Composition of extrusion coating

FIELD: chemistry.

SUBSTANCE: invention relates to a multimodal polyethylene resin, an extrusion composition, containing it, and products, which can be used for manufacturing extrusion coatings, extrusion profiles and films.

EFFECT: extrusion composition contains the multimodal polyethylene resin and from 2 to 20 wt % of a polyethylene low density resin, and is characterised by high rates of a technological line, high resistance to resonance in the process of the extrudate drawing and essentially reduced degree of necking.

9 cl, 5 dwg, 10 tbl, 11 ex

 

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to application U.S. No. 12/608647, filed on 24 November 2009.

Background of the INVENTION

This invention relates to new multimodal polyethylenes, polyethylene extrusion compositions containing low density polyethylene and multimodal polyethylene and extruded products made from polyethylene extrusion compositions.

Low density polyethylene (LDPE), obtained as a result of the high pressure polymerization of ethylene using free-radical initiators, as well as high-density polyethylene (HDPE), linear low density polyethylene (LLDPE) and polyethylene low density (PASNP) obtained by carrying out copolymerization of ethylene and α-olefins using Ziegler-Natta and/or metallocene single-centre catalysts at pressures in the range from low to medium, used, for example: (i) for the application of extrusion coatings on substrates, such as cardboard, paper and/or polymeric substrate; (ii) to obtain the film by way of a slot die extrusion for applications such as disposable diaper and packing of food products; and (3) for receiving the extrusion prof�lay, such as sheath of wires and cables. Further in this document traditional resin HDPE, LLDPE and PASNP, including linear and essentially linear polyethylene resin, collectively referred to as linear polyethylene. Despite the demonstration of the LDPE resin in General superior extrusion processing AIDS and high degrees of extrusion of the extrusion, the extrusion compositions of LDPE is no resistance to misuse and impact strength sufficient for many applications.

Restrictions on density for LDPE resins in the form of approximately 0,915-0,935 g/cm3hinder their use in unmixed condition in the presence of demand characteristics in the low heat sealing packaging or in applications with increased density, such as a coating for the separation of paper, a coating for photographic paper, which requires the presence of an increased elastic modulus. For purposes of applying extrusion coating and slot die extrusion of efforts to improve the properties as a result of receipt of LDPE compositions having high molecular weight (i.e., characterized by a melt index (I2less than about 2 g/10 min), ineffective, since such compositions inevitably characterized by excessive PR�cestu melt to successful drawing at high speed production line. While the ethylene copolymers, including functionalized olefins, such as vinyl acetate, demonstrate a lower temperature for heat sealing, chemical properties of these resins make them unsuitable for many use cases. Any known method for producing LDPE resin having a density of greater than approximately 0,935, has not been described. Thus, applications that require such high densities, rely on a linear resin, usually mixed with LDPE resin for improving the performance characteristics of the coating, but usually to the detriment of desirable physical properties.

While the extrusion of the composition HDPE, LLDPE and PASNP demonstrate the improved characteristics of resistance to stress if not properly used, impact strength and barrier resistance (in relation, for example, to the penetration of moisture and fat), these linear ethylene polymers can be subjected to extrusion or drawing at high speeds and, as you know, they exhibit relatively poor extrusion processability in the form of high degrees of samoobrazovaniya, resonance during the extraction of the extrudate and a big load on the engine.

Limiting the degree of extrusion of the extrusion of the ethylene-α-olefin interpole�'erov rather limited (if practical in other respects, the velocity of extrusion processing line) the beginning of the emergence of the phenomena of instability of the melt flow, known under the name resonance during the extraction of the extrudate, in comparison with limited breaks in tension of the melt, due to "strain hardening" which occurs at higher speeds the process line and is typical for LDPE resin and other vysokorazvetvlennyi ethylene polymers high pressure, such as, for example, copolymers of ethylene-acrylic acid (EAK), and copolymers of ethylene-vinyl acetate (EVA), referred to herein functionalized LDPE resins.

Linear low density polyethylene (LLDPE) is typically a copolymer of ethylene and α-olefin containing from 3 to 12 carbon atoms, preferably from 4 to 8 carbon atoms (for example, 1-butene, 1-ökten, and the like), characterized by a content of α-olefin, is sufficient to reduce the density of the copolymer to a density in the range from 0,915 to 0,935 g/cm3- the range of densities available for the LDPE resin. The LLDPE resin in many areas demonstrate improved performance characteristics in comparison with what occurs for LDPE resins, including the improved characteristics of resistance to stress if not properly used, the impact strength, the characteristics of the sealant, the range of elastic modulus, barrier resistance� (relative, for example, to the penetration of moisture and fat). However, in the General case of a linear ethylene polymers exhibit an unacceptably high degree of samoobrazovaniya and resonance during the extraction of the extrudate that as a result leads to relatively poor extrusion processing AIDS in comparison with pure LDPE resin. Consequently, the LLDPE resin in the General case considered unacceptable in the extrusion coating industry, and in commercial applications they are mixed with the resin LDPE to improve processing AIDS while benefiting from an excellent range of physical properties of LLDPE resins. However, the addition of LDPE resins, in fact, has a certain negative impact on the performance of LLDPE resins.

It describes several of the compositions containing the resin LDPE, mixed with linear polyethylene resins. For example, in U.S. patent No. 5582923 describes compositions, characterized by the level of the resin content of LDPE is in the range from 5% to 20%, the value of I2<6 g/10 minutes and a linear density of 0.85 to 0.94. Similarly, in U.S. patent No. 5773155 and in the publication EP 0792318 describes essentially linear polyethylene is mixed with up to 25% of LDPE resin. In the publication WO 2005/023912 describes the extrusion composition comprising, a minimum, 10% of LDPE resin, where essentially linear polyethylene component is characterized by a melt index of >20 g/10 min, the Compositions described in these references can be mixed within the part of the step of granulating the powder in a gas-phase method of manufacturing a linear polyethylene resins. However, not all production systems prove the existence of such technological capabilities. In the General case, these compositions cannot be obtained in the method of obtaining the solution of linear polyethylene resins to granulation, as a means of supplying the required quantities of LDPE is not available or would require an unacceptable reduction in performance of the reactor. Thus, these mixtures should be obtained after pelleting at significant costs (e.g., costs associated with re-heating of polymers and transportation).

Often the installation for the method of obtaining the solution of linear polyethylene develop where there are opportunities for lateral supply a certain amount of material in the flow of molten polymer before pelletization. The maximum amount that can be added to the result of adding the supply side, in the General case is less than 20% of the polymer flow, and more often <6% of the polymer flow. Dan�th ability to add side cart in the General case is used to add to the polymer additives, such as antioxidants, additives reduce friction, and the like.

Thus, there is a need for linear polyethylene compositions of a wide range of densities, which in the case of mixing with the resin LDPE demonstrate acceptable behavior in a coating, and wherein the mixture contains <20% of LDPE resin of the total weight of the resin, and preferably <6% of LDPE resin.

Due to the limited availability of autoclave LDPE resin occurs another need. Although in the General case, the preference of autoclave LDPE resin for methods of applying extrusion coating in comparison with autoclave LDPE resin, there is a much greater availability of LDPE resin produced in a tubular reactor. However, the LDPE resin produced in a tubular reactor, has a tendency to lead to smoke emission during the application extrusion coating. In addition, in comparison with autoclave LDPE resin while mixing with linear polyethylene will require a more significant amount of LDPE resin produced in a tubular reactor, to achieve acceptable processing AIDS, such as low degree of samoobrazovaniya and high degrees of drawing. The amount of resin LDPE produced in a tubular reactor and in General required to obtain acceptable extrusion Perera�ativamente, is at least 25% of the aggregate amount of resin when mixed with known linear polyethylene resins. Such large quantities of LDPE resin produced in a tubular reactor, causing significant smoke generation during extrusion and are often associated with the deposition of wax on various parts of the extrusion equipment, such as rollers, which may lead to unwanted downtime. To take advantage of the greater availability of polyethylene produced in a tubular reactor, it would be desirable to have a linear polyethylene composition which when mixed with less than 25% of LDPE resin produced in a tubular reactor, based on the total weight of the resin showed acceptable extrusion processability.

As described herein below, the present invention essentially satisfies the need in the ethylene polymer extrusion compositions, characterized by a high speed processing line, high resistance to resonance during the extraction of the extrudate and significantly reduced the degree of samoobrazovaniya and containing <20% autoclave LDPE resin in the calculation of the total mass of the resin, and preferably <6% autoclave LDPE resin, and method for producing such composition.�th. Embodiments of the invention further satisfies the need in the ethylene polymer extrusion compositions providing acceptable operational characteristics of the installation for coating extrusion coating containing resin and LDPE is produced in a tubular reactor and component from 15% to 20% of the total amount of the resin composition. Component in the form of a linear polyethylene resin of embodiments of the present invention includes high molecular weight component is characterized by the presence of significant long-chain branching, and low-molecular component and herein below called intermodal or multimodal polyethylene polymer PE. The compositions of the present invention can be used in combination with known equipment and equipment modifications for the manufacture of resins and coating extrusion coating, and can be implemented and combined or synergistic advantages of the present invention and the known solutions.

SUMMARY of the INVENTION

Certain embodiments of the invention propose a polyethylene resin characterized by further: (a) Mw(abs.)/Mw(AP)>1.05 and <1,6; (b) Mz(MEAs.)/Mz(Theor.)>1.4 and <3,0, where a value of Mz(�Syd.) calculated according to the measured value of I 2in accordance with the expressionMz(paCh.)=1,5*10(5,077-0,284*log10(I2));(c) I2>8.0 g/10 minutes and < 15.0 g/10 minutes; (d) FIA(fraction according to claims)>0,01 at log10(Mw) of 5.5; and (e) a density in the range of indexes of 0.860-0,965 g/cm3(PP - refractive index, FIA - the total fraction of the detector).

Other variants of the invention offer an extrusion composition comprising from 80% to 98% multimodal polymer PE and from 2% to 20% LDPE resin, where the multimodal PE polymer further characterized as: (a) Mw(abs.)/Mw(AP)>1.05 and <1,6; (b) Mz(MEAs.)/Mz(Theor.)>1.4 and <3,0; (c) I2>8.0 g/10 minutes and < 15.0 g/10 minutes; (d) FIA(fraction according to claims)>0,01 at log10(Mw) of 5.5; and (e) a density in the range of indexes of 0.860-0,965 g/cm3; and the LDPE resin is characterized by a value of I2less than 10 g/10 min and greater than 0.2 g/10 min, and the ratio Mw(abs.)/Mw(AP)>2,0.

In specific embodiments, the extrusion composition comprises from 91% to 97% of the multimodal PE polymer and from 3% to 9% of LDPE resin, and, besides�, the multimodal PE polymer further characterized as: (a) Mw(abs.)/Mw(AP)>1,10 <1,20; (b) Mz(MEAs.)/Mz(Theor.)>1.5 <2,5; (c) I2>9.0 and <12,0; (d) FIA(fraction according to claims)>0,02 at log10(Mw) of 5.5; and (e) MMP>3.0 <3,5; and the LDPE resin is characterized by a value of I2less than 1.0 g/10 min and greater than 0.3 g/10 min, and the ratio Mw(abs.)/Mw(PP) is >3,2.

Still other embodiments of the invention offer a product comprising at least one layer of ethylene polymer extrusion composition, where the extrusion composition comprises from 80% to 98% multimodal polymer PE and from 2% to 20% LDPE resin. In certain aspects of the invention ethylene-based polymer composition has the form of an extrusion profile, extrusion coating on a substrate or film, obtained by the method of cast extrusion. In other aspects of the invention, the product is an extrusion coating on the substrate, and the substrate is a woven or nonwoven material. In still other aspects, at least one layer of ethylene polymer composition is a sealant layer, a layer of adhesive, a layer which is resistant to impacts if not properly used, or the dividing surface.

Description of the DRAWINGS

Fig.1 is a table including working cond�Wii for the primary reactor, used when receiving certain embodiments of the invention, namely, examples of the invention ("Ave." or "PI") 1-8 and comparative examples ("Ms. D." or "SP") And-V.

Fig.2 is a table that includes the operating conditions for the secondary reactor is used to receive certain embodiments of the invention, namely examples of the invention ("Ave." or "PI") 1-8. Comparative examples (JV) A-b represent one-pot resin and shown in Fig.2.

Fig.3 is a graphical illustration of the molecular weight distribution according to GPC measurement method detecting the presence of a bimodal distribution of MMP two multimodal polymers of PE, suitable for use in embodiments of a composition of the invention and constitute examples of PI 2 and 3, illustrating a graph of the original data, presented in the form of response of light scattering" (=MM*concentration), the amount of elution.

Fig.4 shows the normalized data of Fig.3.

Fig.5 shows graphs for FIA(PP) from the examples of the invention and comparative examples discussed in this paper. In the accompanying inscriptions in Fig.5 the term "SP" is used to indicate the comparative examples, and the term "PI" is used for about�values of examples of the invention.

DESCRIPTION of PREFERRED embodiments

1.Definitions

The term "discharged from the extruder in accordance with the usage in this document refers to the speed at which moves the substrate, thus stretching or elongating the molten polymer extrudate.

The term "degree of samoobrazovaniya" in accordance with the usage in this document represents the difference between the width of the extrusion head and the width of the extrudate on a manufactured product. The magnitude of the degree of samoobrazovaniya given in the present document define when the speed of withdrawal from the extruder 440 ft/min (134 m/min), which yields a coating thickness of 1 mil (25,4 µm) at a speed of extrusion of approximately 250 lbs/HR (113 kg/h), when using the device for applying extrusion coating, characterized by a diameter of 3.5 inches (88,9 mm) and L/D ratio of 30:1 and is equipped with an extrusion head having a width of 30 inches (762 mm), converging to 24 inches (610 mm), and the gap of the slit of the extrusion head 25 mils (635 microns), at a temperature of approximately 600°F (316°C), while the "hood" is defined as the speed of the outlet of the extruder in which the molten material breaks away from the extrusion head, or as the velocity at which the observed destabi�nost edges. Data are also available at the speed of withdrawal from the extruder 880 ft/min (268 m/min) in similar technological conditions, will result in a coating thickness of 0.5 mil (12.7 m).

The term "polymer" in accordance with the usage in this document refers to a polymer compound obtained by polymerization of monomers, whether of identical or different types. Thus, the generic term "polymer" includes the term "homopolymer" is used to refer to polymers derived from only one type of monomers, and the term "copolymer" refers to polymers derived from two or more different monomers.

The term "LDPE resin" in accordance with the use herein can also refer to "ethylene-based polymer of high pressure" or "vysokorazvetvlennyi polyethylene" and is defined as the designation that the polymer is partly or entirely derived from homopolymerization or copolymerized in autoclave or tubular reactors at pressures greater than 14500 lbs/inch2(100 MPa), using free-radical initiators, such as peroxides (see, for example, publication US 4599392, by reference incorporated herein).

The term "functionalized polyethylene" refers to polyethylene, including, �about least one functional group in its polymer structure. Examples of functional groups may include, for example, Ethylenediamine mono - and difunctional carboxylic acids, anhydrides Ethylenediamine mono - and difunctional carboxylic acids, their salts and esters. Such functional groups can be grafted on the ethylene homopolymer or ethylene-α-olefin interpolymer, or it may be introduced by copolymerization with ethylene and an optional additional comonomer to obtain interpolymer of ethylene, the functional comonomer and optionally other comonomer (comonomers).

The term "long-chain branch" or "DCO" in accordance with the usage in this document refers to a chain length corresponding to at least 6 carbon atoms, with a larger number of carbon atoms of the length cannot be distinguished using spectroscopy,13With nuclear magnetic resonance. Long-chain branch can be about the same length as the length of the main polymer chain to which it is attached.

The term "molecular weight distribution" or "MMP" in accordance with the usage in this document is defined as the ratio between weight average molecular weight and having a number average molecular weight (M w/Mn). Values of Mwand Mndetermined in accordance with methods known at the present level of technology, when using conventional chromatography GPC.

The ratio Mw(abs.)/Mw(GPC) or "Gr" in accordance with the usage in this document is determined by its values where the magnitude of Mw(abs.) represents a mass-average molecular weight determined by light scattering at a small angle (such as 15 degrees) and put the weight of the polymer, and the magnitude of Mw(GPC) represents a mass-average molecular weight, obtained by calibrating the GPC method. The light scattering detector is calibrated to obtain an equivalent mass-average molecular weight, as in the device of the GPC method for linear polyethylene homopolymer standard, such as NBS 1475.

2.Description composition

Embodiments of the extrusion compositions of the invention are the mixtures of one or more multimodal polyethylene resins, each contains a high-molecular component, characterized by the presence of substantial long-chain branching, and at least one more low molecular weight polyethylene resin mixed with one or more resins LDPE or blends of LDPE resin and one or more discharge points�Kimi functionalized resins LDPE, optionally together with additional polymers, such as minor amounts of polypropylene. While embodiments of the invention may contain up to 20% LDPE, one preferred variant implementation contains approximately 90% of at least one component in the form of a multimodal polymer of PE based on the total weight of the composition. In yet another preferred embodiment of the composition comprises at least about 94% of the component in the form of a multimodal polymer of PE and, in one more preferred embodiment of the composition comprises 96% of the component in the form of a multimodal polymer of PE.

Embodiments of compositions of the invention also contain from 2% to 20%, preferably from 4% to 10% based on the total weight of the composition, of at least one of LDPE resin. You must understand that the total amount of the multimodal polymer PE and LDPE resin need not be equal to 100%.

Like now you can imagine without binding itself to any particular theory, the low degree of samoobrazovaniya given by compositions of the invention, despite the low levels present LDPE resin, is caused by the molecular architecture of the component in the form of a multimodal polymer PE to�notizie. As you can imagine without the intention to bind themselves to any particular theory, macromolecular vysokorazvetvlennyi component of a multimodal polymer of PE yields a unique balance between processability and extraterrest observed in embodiments, the polyethylene extrusion compositions of the invention.

3.Resin LDPE

The LDPE resin, preferred for use in the present invention has a density in the range from 0,916 g/cm3to 0,935 g/cm3. In this document and included in this document describes all individual values and subranges in the range of from 0,916 to 0,935 g/cm3; for example, the density may be in the range from the lower limit in 0,916 g/cm3; of 0.917 g/cm3or 0,918 g/cm3to the upper limit in 0,922 g/cm3that 0,927 g/cm3or 0,935 g/cm3. For example, resin LDPE may have a density in the range of 0.917 g/cm3to 0,922 g/cm3or alternatively from 0,918 g/cm3to 0,934 g/cm3. The LDPE resin, preferred for use in the present invention is characterized by a melt index (I2) in the range from 0.2 g/10 minutes to 10 g/10 minutes. In this document and included in this document describes all individual values and subranges in the range of from 0.2 g/0 min to 10 g/10 minutes; for example, the melt index (I2) can be in the range from the lower limit of 0.3 g/10 minutes, 0.4 g/10 minutes, or 0.5 g/10 minutes to an upper limit of 1 g/10 minutes, 2 g/10 minutes, 3 g/10 minutes or 7 g/10 minutes. For example, the LDPE resin may have a melt index (I2) in the range from 0.3 g/10 min to 3 g/10 minutes; or in the alternative LDPE resin may have a melt index (I2) in the range from 0.4 g/10 min to 7 g/10 minutes. In some embodiments, the melt index (I2) LDPE resin may be greater than about 0.25 g/10 minutes, or alternatively greater than 0.3 g/10 minutes. In some embodiments, the melt index (I2) LDPE resin may be smaller than 3 g/10 min, or alternatively less than about 0.7 g/10 min, Despite the possibility of using in embodiments, compositions of the invention LDPE resin, characterized by the ratio Mw/Mn>5,0 according to measurement by conventional GPC method, the preferred embodiments of the compositions include LDPE resin, characterized by the ratio Mw/Mnaccording to measurement by conventional GPC method, of greater than approximately 10. The preferred LDPE resin may also be characterized by the ratio Mw(abs.)/Mw(GPC) (or the value of G), greater than approximately 2.0, while in some applications it is preferable to use Gr values greater than 3 or 3.5. According to the measurement creditaction the GPC method, the ratio Mw(abs.)/Mw(PP) is >2,0, more preferably >to 3.0, and most preferably >3,3. The preferred LDPE resin can be obtained by autoclave method in single-phase conditions designed to give high degrees of long chain branches in accordance with the description in the patent publication according to KDP WO 2005/023912, the description of which is incorporated herein.

The composition of some embodiments of the present invention may also include resins and mixtures of LDPE/PE-LD, where one of the resins LDPE is characterized by relatively higher melt index and the other a lower melt index and is more vysokorazvetvlennyi. Component with higher melt index, can be obtained from the tubular reactor and the component of the mixture, characterized by a lower value of IL and greater branching, can be added to individual stages of extrusion or when using parallel tubular/autoclave reactor in combination with the special methods of control of melt index in each reactor, such as from�treatment of telomere in the recycle flow or addition of fresh ethylene to the autoclave reactor, or any other known state of art technology controls the melt index obtained in each reactor. Melt index (I2) LDPE resin produced in a tubular reactor and intended for use in the compositions of the invention preferably is in the range of 0.2 g/10 minutes 5.0 g/10 minutes, and more preferably from 0.2 g/10 min to 1.0 g/10 minutes, and most preferably from 0.2 g/10 minutes to 0.5 g/10 minutes. Can also be used and two-phase autoclave LDPE resin, characterized by a melt index (I2) in the range of 0.2 g/10 minutes 5.0 g/10 minutes, and more preferably from 0.2 g/10 min to 1.0 g/10 minutes and most preferably from 0.2 g/10 minutes to 0.5 g/10 minutes.

Ethylene-based polymer composition of a high pressure, suitable for use upon receipt of embodiments of the extrusion compositions of the invention include low density polyethylene (homopolymer), ethylene, copolymerizing at least one α-olefin, such as butene, and ethylene, copolymerizing at least one α,β-ethyleneamines a comonomer such as acrylic acid, methacrylic acid, methyl acrylate and vinyl acetate. One technique suitable for use in obtaining suitable ethylene copolymer compositions of high pressure description�is pointed out in U.S. patent No. 4599392, the description of which by reference is incorporated herein.

While suitable for use in the invention are considered as ethylene homopolymers and copolymers of high pressure, in the General case, preferred is a polyethylene homopolymer.

4.Multimodal polymer PE

Multimodal polymer of polyethylene in accordance with the use herein include the linear and essentially linear polyethylene resin. The multimodal PE polymer used in embodiments of the invention may have a density in the range of indexes of 0.860 to 0,965 g/cm3. In this document and included in this document describes all individual values and subranges in the range of indexes of 0.860 to 0,965 g/cm3; for example, the density may be in the range from the lower limit in indexes of 0.860 g/cm3that 0,875 g/cm3, to 0.900 g/cm3that 0,905 g/cm3or 0,910 g/cm3to the upper limit in 0,965 g/cm3that 0,960 g/cm3that 0,950, 0,940 or 0.930 g/cm3. For example, resin LDPE may have a density in the range from 0,875 g/cm3to 0.940 g/cm3or alternatively in the range from 0,905 g/cm3to 0,965 g/cm3. The multimodal PE polymer can be obtained by conducting polymerization in the gas phase, in solution phase or in suspension or in luboya combination when using any type of a single reactor or combinations of two or more reactors in any type of reactor or reactor configuration, known at the present level of technology. The multimodal PE polymer used in the preferred embodiments, the extrusion compositions of the invention receive according to the method of obtaining the solution implemented either in parallel or in serial durectory modes.

The multimodal PE polymer obtained in durection mode, contains a component with higher melt index (I2) (or low molecular weight) and obtained in one reactor, together with the component, characterized by a lower melt index (I2) (or high molecular weight) and obtained in the second reactor, where the value of (log10(component, characterized by a higher melt index)) - (log10(component, characterized by a low melt index)) is greater or equal to 2.0. In embodiments, the high molecular weight portion includes the presence of long chain branches. Low-molecular component in this duraction multimodal PE polymer can be obtained by using either molecular catalyst such as described herein, or a heterogeneous catalyst such as a catalyst of the Ziegler/Natta, while high-molecular components can be obtained by using m�sekularnog catalyst.

The density of the multimodal polymer of PE is limited to only theoretical limits and can be selected in accordance with the wishes for the intended end use. The preferred copolymer for multimodal polymer PE includes any C3-C20alpha-olefin, despite the preference for many application domains such as 1-hexene and 1-ökten. To obtain the multimodal PE polymer used in embodiments, compositions of the invention may also be used and end dienes, including butadiene, and dienes, characterized by a higher number of carbon atoms. In certain preferred embodiments, use of 1,9-decadiene.

The multimodal PE polymer used in the preferred embodiments, compositions of the invention contains a high molecular weight (VM) component, where VM is the component includes substantial long chain branching.

Melt index (I2) preferred parts in the form of multimodal PE polymer composition of the invention is in the range of 5-15 g/10 min In this document and included in this document describes all individual values and subranges in the range of 5 to 15 g/10 minutes; for example, the melt index (I2) finds�Xia in the range from the lower limit of 5 g/10 minutes, 6 g/10 minutes or 7 g/10 minutes to an upper limit of 10 g/10 minutes, 11 g/10 minutes, 13 g/10 minutes, or 15 g/10 minutes. For example, the multimodal PE polymer may have a melt index (I2) in the range of 5 to 13 g/10 minutes; or in an alternative embodiment, the multimodal polymer PE can be characterized by a melt index (I2) in the range of 7 to 11 g/10 minutes. The ratio of I10/I2for multimodal PE polymer may be greater than or equal to 7.0. In alternative embodiments, the ratio of I10/I2can be greater than or equal to 8, while in other embodiments, the ratio of I10/I2can be greater than 10. Resin multimodal polymer PE includes more than one component, then at least one component in the form of multimodal PE polymer preferably is a high molecular weight polymer characterized by the presence of significant long-chain branching (VM-DCO-component) within the limitations of the method and with the following further restrictions in respect of the totality of multimodal resin polymer PE:

and. Mw(abs.)/Mw(AP)>1.05 and <1,6;

b. Mz(MEAs.)/Mz(Theor.)>1.4 and <3,0, where a value of Mz(Theor.) calculated according to the measured value of the RR in accordance with the expression

Mz(paCh.)=1,5*10(5,077-0,284*log10(I2));

c. I2>8.0 g/10 minutes and < 15.0 g/10 minutes; and

d. FIA(fraction according to claims)>0,01 at log10(Mw) of 5.5.

VM-DCA component of multimodal PE polymer is preferably from 15% to 35% (wt.) of the total weight of the multimodal resin PE polymer, preferably from 20% to 30%, and most preferably from 23% to 27%. VM-DCA component of a multimodal polymer of PE is made in such a way as to introduce the possibility of a greater degree of DCO in the way of obtaining in the solution. This entails the implementation of a method for producing in solution conditions that favor the formation of macromenu vinyl-terminated chain at high temperature reaction and/or the use of a catalyst, which favors this mode is open circuit) and which favor the inclusion of these macromeris (at low concentrations of ethylene and/or with the use of a catalyst which favors the inclusion of these macromeris). In addition, a suitable d�I increase the degree of branching in this component is the use of the diene as a comonomer. Details on the method of obtaining the solution using catalysts which favor the formation of long-chain branches can be found in the publication WO 2007136506.

In yet another preferred aspect of the invention, the multimodal polymer PE contains only components with low and high values of I2and, thus, includes a bimodal distribution of MMP according to the GPC measurement method-RS. Fig.3 and 4 illustrate a bimodal distribution of MMP for examples of multimodal resins polymers PE of the present invention. Thus, such an arrangement preferably through a two-stage mortar reactor. In alternative embodiments, the resin is multimodal PE polymer can be obtained in one reactor when using two or more different catalysts selected to obtain resins of different molecular masses, in the same conditions in the reactor or in yet another alternative embodiment of the can be obtained by mixing one or more high molecular weight and one or more low molecular weight components. This latter method is not preferred because it eliminates the benefits of exclusion postreactor paramasivan�me. The use of multiple catalysts in a single reactor, although possible, is not preferred because of widely differing molecular weight required for the two components, the easier it is obtained in two separate reactors, where you controlled to withstand the favorable conditions for obtaining the required molecular weight. In work situations, in which the ethylene and the hydrogen is sent to the recycle from the end of the process and fed into the reactor, where high molecular weight component, it is preferable to remove hydrogen defined means including a catalytic reaction between it and the ethylene after separation of the gas from the mixture of the polymer/solvent to obtain ethane or prior to the separation of ethylene and hydrogen from the mixture of solvent/alpha-olefin.

High molecular weight polymers, characterized by the presence of DCA, preferably obtained by using a molecular catalyst that leads to the production of the resin, characterized by the maximum distribution MWD of 3.0, and is able to provide an introduction to DCO and the formation of high molecular weight, such as described in patent applications WO2007/136497, WO2007/136506, WO2007/136495, WO2007/136496, 2007136494, the description of which by reference are incorporated herein. Low molecular weight components can butpause using any catalyst, known at the present level of technology for producing linear or essentially linear polyethylene. However, the preferred polymer is characterized by the distribution of MMP<a 2.2. In the case of the ethylene-α-olefin comonomers more preferred is a homogeneous distribution of the comonomer. In various embodiments, can be used all the typical and possible levels of comonomer, which is selected ensure compliance with the selected reaction conditions and the catalyst. Thus, various embodiments of the multimodal PE polymer used in the extrusion compositions of the invention exhibit the full density range of the polyethylene, is known on the prior art. The final density can be obtained using any suitable combination of the density distribution among the components. The development of the composition in relation to density determine the properties required for the end application, as is well understood at the present level of technology.

Like now you can imagine without binding itself to any particular theory, the presence of DCA in low molecular weight component (component) has a minor impact on performance.�Ille invention during extrusion (i.e., engine load, the degree of samoobrazovaniya, exhaustion, instability) and the properties of the extruded product, and in the scope of the invention gets any degree of DCO in low molecular weight component (components) of a multimodal polymer of PE.

Due to the relatively broad molecular weight distribution of polymers obtained by using a catalyst of Ziegler-Natta and chromium catalyst, a low molecular weight component (components) of the compositions of the invention preferably receive the distribution of MMP<2,2 using molecular catalyst such as a catalyst with the "hard" geometry, or other catalyst capable of providing or obtaining a polymer such as described in U.S. patents №№ 5272236; 5278272; 5582923; and 5733155 and such as described in patent applications WO 2007136497, WO 2007136506, WO 2007136495, WO 2007136496 and WO 2007136494. This is because a large number of low molecular weight molecules that are present when using resins, characterized by a broad molecular weight distribution, causes unacceptable smoke generation during extrusion and the emergence of high levels of compounds extractable in hexane, extruded polymer, which may be unacceptable, particularly in applications involving contact with food. In the case of �of alimera by way of receiving in the solution is preferred the catalyst used to obtain high molecular weight component, could lead to obtaining a high-molecular product, characterized by high degrees of DCO, when the temperature of the reactor >190°C and with reasonable efficiency. Such catalysts and methods for their use are described in the publications WO 2007136497, WO 2007136506, WO 2007136495, WO 2007136496 and WO 2007136494.

5.The details of the GPC method used in this document

To determine the moments in the GPC method used to determine the characteristics of the polymer compositions used the following methodology:

The chromatographic system consisted of a high temperature chromatograph Waters (Millford, mA) 150C fitted 2-corner detector scattering of laser radiation Precision Detectors (Amherst, mA) Model 2040. To calculate molecular masses used a 15-degree angle light scattering detector. The collection of data was performed using software Viscotek (Houston, TX) TriSEC software version 3 and a 4 channel device, Viscotek Data Manager DM400. The system provided on-line degassing device for removing solvent from the company Polymer Laboratories (Shropshire, UK).

The carousel compartment was operated at 140°C and the column compartment was operated at 150°C. the columns Used yavl�were columns 7 Polymer Laboratories 20-micron Mixed-A LS. Used solvent consisted of 1,2,4-trichlorobenzene. Samples were prepared at a concentration of 0.1 grams of polymer in 50 milliliters of solvent. The chromatographic solvent and the solvent for obtaining the sample contained 200 ppm butylated hydroxytoluene (OSH). Both sources of solvent purged with nitrogen. Polyethylene samples are gently stirred for 4 hours at 160°C. the amount Used of the sample was 200 microliters, and the flow rate was 1.0 milliliter/minute.

The calibration of the set of columns GPC method was performed using 18 polystyrene standards with a narrow molecular weight distributions and molecular weights in the range from 580 to 8400000, which would merge in the form of 5 "kotelevich" mixtures in the separation between individual molecular weights of at least one order of magnitude. Standards were acquired in the company Polymer Laboratories (Shropshire, UK). Polystyrene standards were obtained at 0.025 grams in 50 milliliters of solvent for molecular weights equal to or greater than 1000000, and 0.05 grams in 50 milliliters of solvent for molecular weights less than 1,000,000. The polystyrene standards were dissolved at 80°C for 30 min under gentle stirring. A mixture of standards with a narrow molecules�RNO-mass distributions, ran the first and in descending order of most high molecular weight component to minimize degradation. The peak molecular weight polystyrene standards were converted to polyethylene molecular weights using the following further equations (in accordance with I2the description in the publication of Williams and Ward, J. Polym. Sci., Polym. Let., 6, 621 (1968)):

Mpolyethylene=A×(Mpolystyrene)In,

where M represents the molecular weight, A has a value of 0.41 and 1.0. For approximation of the corresponding equivalent calibration point of the polyethylene used a fourth order polynomial.

The total number of theoretical plates set of columns for GPC method was determined using eicosane (obtained at 0.04 g in 50 milliliters of TCB and dissolved for 20 minutes under gentle stirring). The number of theoretical plates and symmetry were measured for samples introduced in 200 microliters in accordance with the following further equations:

(1) the Number of theoretical plates=5,54*(EE in the maximum peak/(peak width at 1/2 height))^2, where the value of EE is a retained volume in milliliters and the peak width is given in milliliters.

(2) Symmetry=(width of the rear part of the peak at one-tenth the height of EE in the region of the maximum of the peak)/(EE in the field Mak�of imum peak-width of the front part of the peak at one-tenth height)

where the value of EE is a retained volume in milliliters and the peak width is given in milliliters.

A systematic approach to the determination of multi-detector errors implemented according to the method, consistent with what was published by the authors Balke, Mourey, et al. (Mourey and Balke, Chromatography Polym. Chpt. 12, (1992)) (Balke, Thitiratsakul, Lew, Cheung, Mourey, Chromatography Polym. Chpt. 13, (1992)), optimizing a two-detector results in log MM for characterized by a broad molecular weight distribution polystyrene Dow broad polystyrene 1683 in accordance with the results of the calibration of the column when using standards with a narrow molecular weight distributions, with a calibration curve using standards with a narrow molecular-mass distributions, using internal software. Data on molecular weight was obtained according to the method, consistent with what was published by the authors Zimm (Zimm, B. H., J. Chem. Phys., 16, 1099 (1948)) and Kratochvil (Kratochvil, P., Classical Light Scattering from Polymer Solutions, Elsevier, Oxford, NY (1987)). The total concentration of the samples used for determination of molecular weight was obtained in the region of the refractive index for the sample and calibration refractometric detector obtained for linear polyethylene homopolymer having a molecular weight 115000. Chromatographica�concentrations took low enough to exclude appeals to the effects of the 2nd virial coefficient (concentration effects on molecular weight).

To track deviations over time, which may include a component associated with the elution (due to chromatographic changes), and a component associated with the flow (due to pumping changes), eluting the last narrow peak in the General case is used as a "peak marker. Therefore, based on the discrepancy between the peaks of the air degassed for chromatographic solvent system and sample elution from one of polystyrene kotelevich mixes, set the token consumption. The token flow used for linear correction of flow for all samples as a result of peak alignment of air. Any changes in time to peak marker then take the corresponding linear displacement of both the flow rate and by chromatographic tilt.

To facilitate the achievement of higher precision measurements held volume (SV) at the peak of the token flow in approximating the peak marker of the flow concentration chromatograms quadratic equation using the method of approximation by the method of least squares. After that, to determine the true location of the peak using the first derivative of the quadratic equation. After calibration of the system on the basis of the peak marker currents using equation 1 calculate the effective speed of the�texts (in the form of a result of measurement of the slope of the calibration). In the high temperature system method ECHR as a marker of effective currents can be used peak discrepancy of antioxidant or rush of air (in the case of a sufficient degassing of the mobile phase). Primary signs of a marker of the effective velocity are the following: marker currents must be monodisperse. The token flow should elyuirovaniya near total penetration of the column. The token flow must not interfere with the chromatographic window of integration model.

(3) Effective flow rate=nominal flow rate*calibration marker current/observed marker flow

The preferred set of columns is characterized by a particle size of 20 microns and "mixed" porosity to the most adequate separation of high molecular weight fractions in accordance with the invention. Check appropriate column separation and the corresponding shear rate can be carried out as a result of observation under a small angle (less than 20 degrees) working in online mode, the light scattering detector for the standard in the form of high-pressure polyethylene and low density NBS 1476. The corresponding chromatogram by scattering of light should appear bimodal (peak, characterized by a very high value �M, and peak, characterized by a moderate molecular weight) with approximately equivalent to the peak heights. There should be adequate segregation during the demonstration of the presence of the height of the depression between the two peaks, less than half of the total height of the peak by the method of the RS. The number of theoretical plates for chromatography system (based on eicosane, as discussed above) should be greater than 32,000, and symmetry should be in the range from 1.00 to 1.12.

6.Preparation of polymer extrusion composition

Mixtures are preferable for the production of polymer extrusion compositions of this invention may be obtained using any suitable methods known at the present level of equipment, including drum getting dry mixes, filing with the dosage by weight, mixing with a solvent, mixing in the melt during the extrusion of the composition or extruded with lateral supply and the like, and combinations thereof. The extrusion composition of the invention can also be mixed with other polymeric materials such as polypropylene, ethylene copolymers high pressure, such as in the case of ethylvinylacetate (EVA) and ethylene-acrylic acid and the like, ethylene-styrene interpolymer, until will overcome�atsya required rheology and molecular architecture, will be indicated by multi-detector GPC method. The composition of the invention may be used to produce single-layer or multilayer components and structures, for example, as a sealant layer, adhesive layer or tie layer. Other polymeric materials may be mixed with the composition of the invention for modifying the characteristics of processing, film strength, heat sealing or adhesion, as in the General case it is known at the present level of technology.

To obtain the compositions of the invention part of the preferred compositions in the form as LDPE resin, and multimodal PE polymer can be used in chemically and/or physically modified form. Such modification can be accomplished by any known technique, such as, for example, in the case of isomerization and extrusion vaccinations.

In the ethylene polymer extrusion composition of the present invention also may include additives such as antioxidants (for example, spatial gridlocked phenolic derivatives, such as Irganox® 1010 or Irganox® 1076 supplied by Ciba Geigy), phosphites (e.g., Irgafos® 168 also supplied by Ciba Geigy), an additive, which imparts stickiness (for example, PIB), the reagent Standostab PEPQ™ (supplied by Sandoz), pigments, dyes, fillers and the under�Noah, to the extent that they do not create interference to achieve high hoods and significantly reduced the degree of samoobrazovaniya discovered by applicants. These compositions preferably do not contain antioxidants or contain only a limited number of them, since these compounds can interfere to achieve adhesion to the substrate. The product obtained from the composition of the invention or uses it, can also contain additives that improve the performance of anti-adhesion and coefficient of friction, comprising the following, but not limited to only this: do not cover the treated silicon dioxide, talc, calcium carbonate and clay, as well as primary, secondary and substituted fatty acid amides, release agents for cooling the rolls, silicone coatings, and the like. Can also be added and other additives that improve the performance of anti-misting, for example, transparent cast films, as described, for example, the author Niemann in U.S. patent No. 4486552, the description of which by reference is incorporated herein. Can also be added other additives such as Quaternary ammonium compounds individually or in combination with copolymers of ethylene-acrylic acid (EAK), or other function�tional polymers, which improves the antistatic properties of coatings, profiles and films of this invention, and provides, for example, packing or manufacture of electronically sensitive goods. Can also be added and other functional polymers such as polyethylene grafted maleic anhydride, which improve adhesion, especially to polar substrates. Still other examples of functionalized polyethylene, which can optionally be added to the options the implementation of the extrusion of the compositions of the present document include: copolymers of ethylene and ethyleneamines carboxylic acids such as acrylic acid and methacrylic acid; copolymers of ethylene and esters of carboxylic acids such as vinyl acetate; polyethylene grafted unsaturated carboxylic acid or carboxylic acid anhydride, such as maleic anhydride. Specific examples of such functionalized polyethylene may include a copolymer of ethylene/vinyl acetate (EVA), a copolymer of ethylene/acrylic acid (EAK), a copolymer of ethylene/methacrylic acid (EMAC), salts thereof (ionomer), polyethylene grafted maleic anhydride (MAH), such as high-pressure polyethylene and low density, grafted when using MAGE, heterogeneous branched linear ethylene-α-olefin Interpol�measures (usually referred to as linear low density polyethylene and polyethylene, ultra low density), homogeneously branched linear ethylene-α-olefin interpolymer, essentially linear ethylene-α-olefin interpolymer and HDPE resin.

Multilayer structures containing a composition of the invention can be obtained by using any known methods, including joint extrusion, lamination and the like, and combinations thereof. In addition, the compositions of this invention can be used in joint operations of extrusion, where the material is characterized by a higher hood, used essentially as a "carrier" for one or more of materials characterized by a lower hood. In particular, the compositions of this invention are particularly well suited for use as a carrier for the material, characterized by a lower degree of stretch.

Ethylene polymer extrusion composition of the present invention, whether single layer or multilayer structures, can be used for the manufacture of extrusion coating, extrusion of profiles and films obtained by the method of cast extrusion, as in the General case it is known at the present level of technology. In the case of use of the composition of the invention for the purpose of coating or multilayer structures of the substrate adjacent layers mA�of erial can be polar or non-polar, including, for example, the following, but not limited to only these: paper products, metals, ceramics, glass and various polymers, in particular, other polyolefins, and combinations thereof. In the case of extrusion profiling can potentially be manufactured a variety of products, including the following, but not limited to only these: seals of refrigerators, shell, wire and cable, coating wires, medical tubes and water tubes, when the physical properties of the composition are suitable for use in these purposes. The film obtained by the method of cast extrusion from the compositions of the invention or when using it, could also potentially be used in applications for packing of food and the wrap industrial stretch-wrap.

EXAMPLES of the INVENTION AND COMPARATIVE EXAMPLES

The following examples illustrate some specific embodiments of the present invention, but the following should not be perceived as an indication to limit the invention demonstrated specific variants of the implementation.

Resin multimodal polymers PE, used in examples of the invention (example of the invention") 1-8, and various resins, which resins Fig�plants and used in the comparative examples (comparative example) A-S.

Table 1 represents the total value of I2, I10and the ratio of I10/I2for multimodal resins polymers PE 1-8 obtained in durection mode when using a component with high molecular weight and the presence of long chain branches, and linear polyethylene resins of comparative examples A-C. table 1 further indicates the catalysts used in obtaining resins of the examples of the invention 1-8, as well as data on nominal polymer, obtained using the high molecular weight catalyst, in the form of level of the percentage content of the total weight of the polymer.

Obtaining polymers:

Ethylene-actinulae copolymers were obtained when using two connected parallel to the hull of rectors with continuous stirring (CRNP). Each reactor is hydraulically full, and placed on the functioning in conditions of steady state. Examples of the invention 1-8 received in two reactors operating in parallel, conditions for which are tabulated in Fig.1 and 2. The sample from the primary reactor is obtained by ensuring the flow of monomers, solvent, catalyst, co-catalyst and MMAO in a primary reactor in accordance with the process conditions shown in Fig.1. Obrazets secondary reactor is obtained by providing separate flow stream of the monomers, solvent, catalyst, co-catalyst and MMAO in the reactor in accordance with the process conditions shown in Fig.2. Flows two reactors unite after a reactor and stirred, obzharivayut and granulated together. Comparative examples A and b were obtained in one-pot mode when using only one primary reactor. The solvent for polymerization reactions is a hydrocarbon mixture (SBP 100/140), purchased at Shell Chemical Comnpany and purified before use by means of layers of molecular sieve 13-X. Unless otherwise stated, all reagents were working under anaerobic conditions using standard techniques for the treatment of materials, are extremely susceptible to the effects of air and water. The solvents before use, degassed and dried over molecular sieves.

Table 1A
Examples of the invention
1-8
Catalyst: VM/NM% VM (nominally)I2(g/10 minutes)I10(g/10 minutes)I10/I2
1A/b2514,31268,8
2A/C2511,712310,5
3A/C3511,214613,1
4D/C2512,71259,9
5D/C3511,414112,4
6E/C2512,119115,8
7E/C3510,725824,1
8A+DDE/C 2513,81017,3

Table 1B
Comparative examples A-CCatalyst: VM/NM% VM (nominally)I2(g/10 minutes)I10(g/10 minutes)I10/I2
AndAnd*11,2867,7
InD*19,91326,6
----12,0675,6
* One-component resin

For example 8 of the invention at a flow rate of 11.8 g/h filed 1,9-decadiene (shown as +DDE in table 1A). Catalysts A, C-E, used for�teachings of the resins from examples of the invention 1-8 and comparative examples A-b in tables 1A and 1B represent the following:

The catalyst may be obtained by using the method described in the publication WO 2007136497 (and references therein). The catalyst is a heterogeneous catalyst type Ziegler and obtained essentially in accordance with the publication US 4612300 (example P) by successive additions to the volume of the reagent Isopar E suspension of anhydrous magnesium chloride in the reagent Isopar E, the solution of EtAlCl2in hexane and a solution of Ti(O-iPr)4in the reagent Isopar E to obtain a composition, characterized by the concentration of magnesium is 0.17 mol/l and the ratio of Mg/Al/Ti 40/12/3. After that an aliquot of this composition containing 0,064 mmol Ti, is treated with dilute solution of Et3Al to obtain an active catalyst in the final quantitative ratio of Al/Ti 8/1. The catalyst can be obtained by using the method described in the publication US No. 5512693. Catalyst D can be obtained using the method described in the publication WO 9849212, and catalyst E can be obtained by using the method described in the publication WO 9806727. Socialization is a tetrakis(pentafluorophenyl)borate and bis(alkyl radical derived solid hydrogenated animal fat)methylamine that can be�ü obtained using the method described in U.S. patent No. 5919983. A comparative example is a commercial homogeneous polyethylene resin, available from ExxonMobil.

Melt index (I2) was measured at 190°C under a load of 2.16 kg in accordance with the document ASTM D-1238-03. Melt index (I10) was measured at 190°C under a load of 10.0 kg according to the document ASTM D-1238-03.

Tables 2A and 2B in total represent the data by the method of GPC for resins of the examples of the invention 1-8 and comparative examples A-C, are illustrated in tables 1A and 1B.

Table 2A
Examples of the invention 1-8MnMwMzMMPMz/MwMz(Theor.)Mz/Mz(Theor.)Mw(abs.)/Mw(PP)
16,55049,450143,4007,5502,90084168 1,704to 1.14
221,43064,490200,5003,0093,109890042,2531,16
318,56060,360174,700is at 3,2522,894901581,9381,17
416,99060,660199,0003,5703,281871162,2841,07
515,43055,150153,5003,5742,783897961,7091,16
6of 13.47061,270226,7004,549883062,5671,09
76,37054,640227,3008,5784,160913582,4881,06
89,37047,770138,7005,0982,903849901,6321,51

Table 2B
Comparative examples A-CMnMwMzMMPMz/MwMz(Theor.)Mz/Mz(Theor.)Mw(abs.)/Mw(PP)
A31,02051,130 105,5001,6482,063902041,1701,23
B21,68048,59080,7002,2411,661766201,0531,13
C20,74052,32093,8002,52to 1.79884901,061,06

Tables 3A-3B are a total of certain key parameters for the resins of the examples of the invention and comparative examples in tables 1A-1B.

Table 3A
Examples of the invention 1-8F=Mw(abs.)/Mw(PP)Z=Mz/Mz(Theor.)R=FIA (PP), fraction with log10 (Mw)=5,5I2(g/10 minutes)
1to 1.141,7040,015814,3
21,162,2530,036111,7
31,171,9380,026611,2
41,072,2840,028212,7
51,161,7090,018811,4
61,092,5670,042612,1
71,062,4880,036110,7
81,511,6320,015213,8

Table 3B
Comparative examples A-CF=Mw(abs.)/Mw(PP)Z=Mz/Mz(Theor.)R=FIA (PP), fraction with log10 (Mw)=5,5I2(g/10 minutes)
A1,231,1700,004811,2
B1,131,0530,000811,0
C1,061,060,001112,0

Each of the resins of multimodal polymers PE from the examples of the invention 1-8 and resins of comparative examples A-C are shown in tables 1A-1B, was used to obtain mixtures of extrusion compositions. Each of the polyethylenes of examples and comparative examples shown in tables 1A-1B, was stirred with 4% (wt.) the LDPE resin. The LDPE resin used in examples and comparative examples, the extrusion of the compositions shown in tables 4A-4B, including how gender�offering LDPE resin, is described in patent publication according to KDP WO 2005/023912. More specifically, the used resin LDPE available in company The Dow Chemical Company under the designation LDPE 662i (characterized by the value of I20.45 g/10 minutes, density 0,919 g/cm3and the ratio Mw(abs.)/Mw(GPC) of 3.5). Each of the extrusion of the compositions of examples 1-8 invention and extrusion of the compositions of comparative examples A-C in tables 4A-4B and 5A-5B received when using the appropriately numbered multimodal polymers PE from the examples of the invention 1-8 and resins of comparative examples A-C, are illustrated in tables 1A-1B.

Tables 4A-4B represent a melt index (I2for extrusion of mixtures of the compositions after receipt of dry mixes, but to the extrusion. With the exception of the mixture from comparative example C (which is performed as a calculation and measurement) the value of I2expected when the model is:

log10(IR)=f_LDPE*log10(I2(LDPE))+f_Linear*log10(I2(Linear)),

IR=10^log(I2), where f_LDPE represents the mass fraction of LDPE resin, and f_Linear represents the mass fraction of the linear resin, and where f_LDPE+f_Linear=1,0.

Table 4A
Examples invented�I 1-8 I2(g/10 min.) (Theor.)
112,5
210,3
39,85
411,1
510,0
610,6
79,43
812,0

Table 4B
Comparative examples A-CI2(g/10 min.) (Theor.)-I2(g-C/10 min.) (MEAs.)
And9,85
In17,1
10,5-10,5

Tables 5A-5B are a total of technological properties of extrusion of the compositions of examples 1-8 invention and extrusion of the compositions of comparative examples A To C, where the amperes, T melt (melt temperature in °C), powerful. (power) and press. (pressure) are working PA�Amery device for coating, and where means. is a hood in ft/min (m/min).

Table 5A
The extrusion compositions of examples of the invention 1-8The degree of samoobrazovaniya (inches (mm)) whenHall.Powerful. (HP (kW))AmpsT of melt (°C)Press. (lb/ inch2(MPa))
440 ft/min (134 m/min)880 ft/min (268 m/min)
14,375 (111)4,000 (102)1500+ (457)35 (25,7)1263131135 (7,83)
23,625 (92,1)3,500 (88,9)1250 (381)20 (14,7)75319863 (5,95)
3 3,750 (95,3)3,750 (95,3)1275 (389)22 (16,2)78318766 (5,28)
43,500 (88,9)3,375 (85,7)1500+ (457)28 (20,6)1013151105 (7.62 mm)
54,000 (102)of 4.125 (105)1500+ (457)15 (11,0)55320588 (4,05)
63,625 (92,1)3,625 (92,1)1500+ (457)16 (11,8)58317695 (4,79)
74,250 (108)4,250 (108)1500+ (457)17 (12,5)62316655 (4,52)
83,750 (95,3) 3,750 (95,3)1500+ (457)26 (19,1)94316937 (of 6.46)

Table 5B
The extrusion compositions of comparative examples A-CThe degree of samoobrazovaniya (inches (mm)) whenHall.Powerful. (HP (kW))AmpsT of melt (°C)Press. (lb/ inch2(MPa))
440 ft/min (134 m/min)880 ft/min (268 m/min)
And4,250 (108)4,000 (102)1500+ (457)34 (25,0)1213171227 (is 8.46)
In4,500 (114)of 4.125 (105)1500+ (457)30 (22,1) 111316994 (of 6.85)
6,375 (162)5,875 (149)1500+ (457)40 (29,4)1433231803 (12,4)

1. Multimodal polyethylene resin comprising a high molecular weight component containing a long-chain branch, where the multimodal polyethylene resin is characterized by the following values:
and. Mw(abs.)/Mw(the refractive index PP)>1.05 and <1,6;
b. Mz(MEAs.)/Mz(Theor.)>1.4 and <3,0, where a value of Mz(Theor.) calculated according to the measured value of the melt index (I2in accordance with the expressionMz(paCh.)=1,5*10(5,077-0,284*log10(I2));
c. I2>8.0 g/10 minutes and < 15.0 g/10 minutes;
d. the total fraction of the FIA detector (fraction according to the refractive index PP)>0,01 at log10(Mw) of 5.5; and
E. density in the range of indexes of 0.860-0,965 g/cm3./p>

2. The extrusion composition comprising from 80% to 98% multimodal polyethylene and 2% to 20% of resin low density polyethylene LDPE, where the multimodal polyethylene comprises high molecular weight component containing a long-chain branch and is characterized by the following values:
and. Mw(abs.)/Mw(the refractive index PP)>1.05 and <1,6;
b. Mz(MEAs.)/Mz(Theor.)>1.4 and <3,0, where a value of Mz(Theor.) calculated according to the measured value of the melt index (I2in accordance with the expressionMz(paCh.)=1,5*10(5,077-0,284*log10(I2));
c. I2>8.0 g/10 minutes and < 15.0 g/10 minutes;
d. the total fraction of the FIA detector (fraction according to the refractive index PP)>0,01 at log10(Mw) of 5.5; and
E. density in the range of indexes of 0.860-0,965 g/cm3; and
resin LDPE is characterized by the value of I2less than 10 g/10 minutes and greater than 0.2 g/10 minutes, and the ratio Mw(abs.)/Mw(AP)>2,0.

3. The extrusion composition according to claim 2, where the composition comprises from 91% to 97% of the multimodal polyethylene and from 9% of LDPE resin, and, in addition, where the multimodal polyethylene comprises high molecular weight component containing a long-chain branch and is characterized by the following values:
and. Mw(abs.)/Mw(AP)>1,10 <1,20;
b. Mz(MEAs.)/Mz(Theor.)>1.5 <2,5;
c. I2>9.0 g/10 minutes and <12.0 g/10 minutes;
d. FIA(fraction according to claims)>0,02 at log10(Mw) of 5.5; and
E. the molecular weight distribution MWD>3.0 <3,5; and
resin LDPE is characterized by the value of I2less than 1.0 g/10 minutes and greater than 0.3 g/10 minutes, and the ratio Mw(abs.)/Mw(PP) is >3,2.

4. The product, comprising at least one layer of ethylene polymer extrusion composition, where the extrusion composition comprises from 80% to 98% multimodal polyethylene and 2% to 20% of resin low density polyethylene LDPE, where the multimodal polyethylene comprises high molecular weight component containing a long-chain branch and further characterized as:
and. Mw(abs.)/Mw(the refractive index PP)>1.05 and <1,6;
b. Mz(MEAs.)/Mz(Theor.)>1.4 and <3,0, where a value of Mz(Theor.) calculated according to the measured value of the melt index (I2in accordance with the expressionMz(paCh.)=1,5* 10(5,077-0,284*log10(I2));
c. I2>8.0 g/10 minutes and < 15.0 g/10 minutes;
d. the total fraction of the FIA detector (fraction according to the refractive index in p)>0,01 at log10(Mw) of 5.5; and
E. density in the range of indexes of 0.860-0,965 g/cm3; and
resin LDPE is characterized by the value of I2less than 10 g/10 minutes and greater than 0.2 g/10 minutes, and the ratio Mw(abs.)/Mw(AP)>2,0.

5. The product according to claim 4, where the product has the form of an extrusion profile, extrusion coating on a substrate or film, obtained by the method of cast extrusion.

6. The product according to claim 5, where the product is an extrusion coating on the substrate, and the substrate is a woven or non-woven material.

7. The product according to claim 4, wherein the at least one layer of ethylene polymer composition is a sealant layer, a layer of adhesive, a layer which is resistant to impacts if not properly used, or the dividing surface.

8. The product according to claim 7, where the product is a sealant layer and the density of the multimodal polyethylene is <0,915 g/cm3.

9. The product according to claim 7, where the product is dividing surface, and where tight�th multimodal polyethylene is > 0,940 g/cm3.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: group of inventions relates to polyethylene compositions for films or cast products. Composition has melt fluidity index at 5 kg/190°C (MI5 kg) from 0.25 to 3 g/10 min, Mz higher than 2000000 g/mol and lower than 370000 g/mol and Hostalen index (HI) value from 0.18 to 18. When melt fluidity index at 5 kg/190°C (MI5 kg) is higher than 1.9 g/10 min, Hostalen index (HI) value is higher than 1.

EFFECT: polyethylene composition in accordance with invention, possessing specified molecular-weight distribution and long-chained branched structure, possesses improved technological properties, and obtained films have higher mechanical impact strength with film thickness being 10 mcm than at 20 mcm, in accordance with measurement of dart drop impact (DDI).

9 cl, 4 tbl, 8 ex, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of increasing homogeneity of mixtures of polyethylene, intended for manufacturing moulded products, films, tubes, wires and cables. A mixture of polyethylenes contains three fractures (A), (B) and (C) of a homo- or a copolymer of ethylene and at least one comonomer C3-C10 with different molecular weights. The low-molecular fraction A) has the weight-average molecular weight Mw lower than 40 kg/mol, the highly-molecular fraction B) has the molecular weight Mw higher than 250 kg/mol and the fraction C) has the intermediate molecular weight with the weight-average molecular weight Mw from 100 to 200 kg/mol. The mixture of polyethylenes has a single peak of melting as determined by means of differential scanning calorimetry (DSC).

EFFECT: obtained mixtures of polyethylenes, due to the improved homogeneity, possess improved properties, in particular surface properties, good processability and good mechanical properties.

16 cl, 9 dwg, 4 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to pipe, possessing increased resistance to growth of pipe cracks and manufactured from polyethylene composition, as well as to application of phenol type stabiliser (C) and phenol type stabiliser (D) to increase resistance of pipes to slow crack growth. Pipe consists of polyethylene composition, which includes basic resin and phenol type stabilisers (C) and (D), which are different. Stabiliser (C) contains, at least, one ester group, and stabiliser (D) does not contain any ester group. Basic resin of polyethylene composition contains first ethylene homo- or copolymer (A) and second ethylene copolymer (B), with comonomer(s) for copolymer (B) and, possibly, copolymer (A) representing C3-C20 alpha-olefins.

EFFECT: pipes in accordance with invention have stability in testing whole cut for creep (FNCT), measured in accordance with ISO 16770:2004, at least, 5000 h.

11 cl, 1 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a polyethylene moulding composition intended for making pipes, conduits and cables, and a method of producing said composition. The composition has a multimodal molecular-weight distribution, density in the range of 920 to 960 kg/m3, melt flow index MFI190/2 in the range of 0.05 to 10 g/10 min and Shore hardness D, measured according to ASTM D2240-05 (15 s), of at least 56.0. The composition contains at least three ethylene polymer fractions having different molecular weight. Each of the fractions A, B and C is an ethylene homopolymer or a copolymer of ethylene with at least one C3-C10 comonomer.In the composition, one of the fractions A, B and C is an ethylene homopolymer and at least one of the other fractions is an ethylene copolymer with content of said C3-C10 comonomer of 1-15 wt %. Fraction A has weight-average molecular weight Mw in the range of 15 to 40 kg/mol, fraction B - in the range of 70 to 200 kg/mol and fraction C - in the range of 220 to 400 kg/mol.

EFFECT: obtained polyethylene moulding composition has excellent mechanical properties, hardness and wear resistance, and also has high impact resistance and slow crack growth.

13 cl, 6 dwg, 6 tbl

FIELD: chemistry.

SUBSTANCE: method includes stages of mixing an acid-based polymer, a neutralisation agent and a technological additive to obtain a polymer composition. In the process of mixing a level of the acid-based polymer neutralisation constitutes from 25% to 75%. After processing the said polymer composition a polymer fabric, which is granulated into polymer particles, is obtained. The acid-based polymer represents resin with the melt flow index, measured at 190°C under a load of 2.16 kg, from 10 to 60 g/10 min, with the neutralisation agent being selected from the group, consisting of potassium hydroxide, aluminium hydroxide, calcium hydroxide, zinc oxide or their mixtures, salt of metal and fatty acid and a partly or completely neutralised ionomer or their mixtures.

EFFECT: polymer coatings possess a low negative impact on the environment, evaluated by indices of life cycle evaluation.

26 cl, 1 dwg, 10 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a colourless synthetic binding agent, which is applied in the road-industrial area. The colourless synthetic binding agent contains oil of a vegetable origin, resin of a petroleum origin and a polymer. The quantity of oil of a vegetable origin in the binding agent constitutes 10 wt % or more, and the quantity of the polymer in the binding agent constitutes 15 wt % or less.

EFFECT: colourless synthetic binding agent in accordance with invention possesses good consistency, reduced viscosity, acceptable behaviour at low temperature and acceptable elastic properties.

18 cl, 7 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to hot-melt adhesives. The hot-melt adhesive contains 5-40 wt % of a copolymer based on ethylene and C3-C20 α-olefin, which is obtained by metallocene-catalysed polymerisation, 10-65 wt % of tackifying resin, 0-35 wt % of a plasticiser and 0.01-30 wt % of additives. The additives are selected from stabilisers, adhesion promoters, fillers or pigments, waxes and/or other polymers, wherein the total amounts to 100%. The copolymer is a block copolymer having invariable elastic properties in the range of 0°C to 25°C, measured as a ratio of the storage modulus E′ according to (E'0C-E'25C)/E'25C<1.5.

EFFECT: method improves process properties of the hot-melt adhesive while preserving mechanical properties in the temperature range to 50°C.

18 cl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a PVC-free floor or wall covering comprising at least one layer of a thermoplastic composition. The composition contains a polymer matrix comprising at least two polymers and at least 100 pts.wt of least one filler per 100 pts.wt of the polymer(s). Said matrix contains 10-40 pts.wt of a polymer with carboxylic acid anhydride groups in amount of 0.5-3.1 wt %, and the other polymer of the matrix is selected from a group comprising EVA, EMA, EBA, EEA, EPM, EPDM, VLDPE, LLDPE, POE, POP and mixtures thereof, and has melt flow index between 0.6 and 3 g/10 min at 190°C and mass of 2.16 kg. The total amount of combined polymers in the composition is 100 pts.wt.

EFFECT: floor or wall covering obtained according to the invention preferably in form of rolls or tiles has improved residual indentation properties and is also suitable for recycling.

14 cl, 7 dwg, 9 tbl

FIELD: chemistry.

SUBSTANCE: coating comprises an adhesive sublayer of a thermoplastic adhesive and a functional layer of a nanostructured composite material based on polyethylene. The composite material of the functional layer has a polyethylene matrix and montmorillonite particles dispersed in the matrix in amount of 0.1-2 wt %.

EFFECT: improved physical and mechanical properties of the coating.

12 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a low-density ethylene polymer with a multimodal comonomer distribution, a method for production thereof and moulded articles, including films, made from said polymer. The multimodal polyethylene has a wide molecular weight distribution MWD in the range from 3 to 8 and contains two polymer components. The first polymer component is 70-95 wt % copolymer of ethylene with at least one C3-C20-α-olefin comonomer, having MWD less than 5, CDBI greater than 60% and high-load melt index (@21.6 kg, 190°C) of 10-100 g/10 min. The second polymer component is 5-30 wt % substantially homopolymeric polyethylene, having MWD greater than 10, CDBI greater than 80% and high-load melt index (@21.6 kg, 190°C) of 0.2-20 g/10 min. Said multimodal polyethylene is obtained in a single reactor using a catalyst system containing at least two catalysts in form of transition metal complexes.

EFFECT: polyethylene disclosed herein has considerably improved resistance to mechanical factors and excellent processing properties, which enable to avoid use of process additives when processing films.

13 cl, 4 dwg, 3 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a product, namely to a power cable, which includes a semiconductor layer, containing a semiconductor polyolefin composition. The composition contains graphene nanoplates, where the average thickness of the graphene nanoplates is in the range from 1 nm to 50 nm, and their side diameter constitutes 200 mcm or less, and olefin polymer resin of the base. The composition for the power cable can additionally contain solid electroconductive filler, different from the graphene nanoplates. The application of the semiconductor polyolefin composition in the semiconductor layer of the power cable is also described. Improvement of electrical exploitation characteristics in the process of annealing at temperatures lower than the temperature of the polymer melting and the temperature dependence of specific volume resistance in comparison to the one that has place for the respective semiconductor polyolefin compositions based on carbon soot.

EFFECT: roughness of the surface of the semiconductor polyolefin composition for extruded samples constitutes 100 mcm and less.

14 cl 7 dwg, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a method of increasing homogeneity of mixtures of polyethylene, intended for manufacturing moulded products, films, tubes, wires and cables. A mixture of polyethylenes contains three fractures (A), (B) and (C) of a homo- or a copolymer of ethylene and at least one comonomer C3-C10 with different molecular weights. The low-molecular fraction A) has the weight-average molecular weight Mw lower than 40 kg/mol, the highly-molecular fraction B) has the molecular weight Mw higher than 250 kg/mol and the fraction C) has the intermediate molecular weight with the weight-average molecular weight Mw from 100 to 200 kg/mol. The mixture of polyethylenes has a single peak of melting as determined by means of differential scanning calorimetry (DSC).

EFFECT: obtained mixtures of polyethylenes, due to the improved homogeneity, possess improved properties, in particular surface properties, good processability and good mechanical properties.

16 cl, 9 dwg, 4 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to pipe, possessing increased resistance to growth of pipe cracks and manufactured from polyethylene composition, as well as to application of phenol type stabiliser (C) and phenol type stabiliser (D) to increase resistance of pipes to slow crack growth. Pipe consists of polyethylene composition, which includes basic resin and phenol type stabilisers (C) and (D), which are different. Stabiliser (C) contains, at least, one ester group, and stabiliser (D) does not contain any ester group. Basic resin of polyethylene composition contains first ethylene homo- or copolymer (A) and second ethylene copolymer (B), with comonomer(s) for copolymer (B) and, possibly, copolymer (A) representing C3-C20 alpha-olefins.

EFFECT: pipes in accordance with invention have stability in testing whole cut for creep (FNCT), measured in accordance with ISO 16770:2004, at least, 5000 h.

11 cl, 1 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining cross-linked product. Method includes stage of polyethylene polymerisation, optionally, with one or more alpha-olefin comonomer(s) in presence of Ziegler-Natta catalyst, formation of product from said polymer and its further cross-linking. Ethylene polymer, obtained at the stage of polymerisation, contains double bonds carbon-carbon/1000 of carbon atoms in the range from more than 0.2 to fewer than 5.0 double bonds, is characterised by molecular-weight distribution (MWD) in the range from 3.3 to 15 and does not contain long-chain branches. Said polymer is selected from rubbers (POE), thermoplasts (POP) or very low density polyethylenes (ethylene copolymers) (VLDPE), which have range of density from 855 to 909 kg/m3, or linear low density polyethylenes (ethylene copolymers) (LLDPE) with density from 910 to 930 kg/m3, of middle density ethylene copolymers (MDRE) with density from 931 to 945 kg/m3.

EFFECT: obtained cross-linked products have good mechanical properties, meeting high requirements and strict norms.

9 cl, 4 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a polyethylene moulding composition intended for making pipes, conduits and cables, and a method of producing said composition. The composition has a multimodal molecular-weight distribution, density in the range of 920 to 960 kg/m3, melt flow index MFI190/2 in the range of 0.05 to 10 g/10 min and Shore hardness D, measured according to ASTM D2240-05 (15 s), of at least 56.0. The composition contains at least three ethylene polymer fractions having different molecular weight. Each of the fractions A, B and C is an ethylene homopolymer or a copolymer of ethylene with at least one C3-C10 comonomer.In the composition, one of the fractions A, B and C is an ethylene homopolymer and at least one of the other fractions is an ethylene copolymer with content of said C3-C10 comonomer of 1-15 wt %. Fraction A has weight-average molecular weight Mw in the range of 15 to 40 kg/mol, fraction B - in the range of 70 to 200 kg/mol and fraction C - in the range of 220 to 400 kg/mol.

EFFECT: obtained polyethylene moulding composition has excellent mechanical properties, hardness and wear resistance, and also has high impact resistance and slow crack growth.

13 cl, 6 dwg, 6 tbl

FIELD: chemistry.

SUBSTANCE: at the first stage a polymer material to be recycled is loaded into a cutting-compacting device, equipped with a mixing or crushing device, after which the polymer particles are continuously moved and heated in the cutting-compacting device. In order to neutralise the formed products of destruction or decomposition into the softened but not yet melted polymer added is a solid, powder-like, preferably mineral, filling agent, usually used for dilution or as a diluting agent, for instance chalk, diatomaceous earth, zinc oxide, talc, activated coal and/or carbonate, in particular calcium carbonate, in an amount, at least, corresponding to the expected acidic or basic impact. The mixture is continuously mixed, moved, if necessary, crushed and supported in the form of separate pieces or freely flowing for a definite time.

EFFECT: method makes it possible to effectively neutralise acidic and basic compounds, which results in the reduction of corrosion and increase of the service term of machines.

30 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a bimodal polyethylene high-density composition for obtaining products by pressure moulding, in particular caps and plugging means. The composition includes bimodal high-density polyethylene, a composition of an inorganic alpha-nucleating agent, a composition of a friction-reducing agent, representing amide of primary fatty acid, and a composition with one or more additives, selected from antioxidants, acid acceptors, pigments and UV-stabilisers. The application of bimodal polyethylene in a combination with the inorganic alpha-nucleating agent, in particular, with talc and behenamide, as the friction-reducing agent, makes it possible to obtain the moulding composition with an unexpected and synergic impact on crystallisation temperature, and the composition friction coefficient.

EFFECT: composition by the invention demonstrates higher crystallisation temperature and lower friction coefficient.

14 cl, 5 tbl

FIELD: chemistry.

SUBSTANCE: claimed invention relates to a solvent-free polyethylene film, which can be applied, for instance, in membranes, packing, and ballistics. The polyethylene film has a ratio between the strength in the first direction in the film plane and the strength in the second direction in the film plane, perpendicular to the first direction, in the range of 0.1-10:1. The strength in, at least, one direction in the film plane constitutes not less than 0.2 GPa. The weight-average molecular weight of polyethylene constitutes not less than 500000 g/mol, and a value of ratio Mw/Mn does not exceed 6. The method of the said film manufacturing is performed by processing an initial polymer of polyethylene UHMWPE with the weight-average molecular weight of not less than 500000 g/mol by elastic shear modulus, determined immediately after melting at 160°C, not higher than 1.4 MPa, and a value of Mw/Mn ratio not higher than 6. Processing is carried out by pressing in the absence of a solvent. A stage of extraction is performed in such conditions that the temperature of the polymer film half-product does not exceed the temperature of the polymer melting at any time moment. During extraction the force is applied to the polymer film half-product in the first direction and in the second direction, which is perpendicular to the first direction.

EFFECT: film, possessing high strength more than in one direction in the film plane, is obtained.

15 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to use of a stabilised composition based on an ethylene homo- or copolymer containing a combination of at least two sterically hindered amine compounds for making plastic articles for transportation and storage of esters of vegetable oil, preferably plastic fuel tanks for motor vehicles, including single-layer or multi-layer articles. At least one of the sterically hindered amine compounds is selected from compounds having the chemical formula:

and a chemical formula:

, where n is an integer ranging from 2 to 20. The invention also describes a plastic article and components for transportation and storage of liquid fuels, including biodiesel fuel.

EFFECT: high resistance to thermal oxidative decomposition caused by presence of liquid fuels, such as biodiesel fuel, including esters of vegetable oils, together with oxygen.

7 cl, 3 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to heat sealable films, laminated materials, membranes or other polymer articles based on cross-linked polymers, having rubber-like heat resistance (heat deformation) and dimensional stability at temperature higher than the melting point of the polymer, while maintaining properties of the compound obtained by heat sealing (heat-adhesive compound). The heat sealable film contains at least one layer formed from a composition containing A) at least one polymer selected from a group comprising i) an ethylene-based polymer, ii) an ethylene/α-olefin/diene interpolymer and iii) a polymer based on a C4-C10 olefin, and B) at least one polymer selected from a group consisting of a propylene/ethylene interpolymer and a propylene/α-olefin interpolymer. Said film is cross-linked using radiation and/or chemical reagents.

EFFECT: polymer films and articles disclosed herein have improved mechanical properties and improved puncture resistance and can be used for high-temperature filling and processing in thermal or radiation sterilisation conditions, and as stretch films and shrink films.

13 cl, 9 dwg, 8 tbl

FIELD: packaging industry.

SUBSTANCE: invention relates to multilayer packaging materials for containers with liquids and relates to the multilayer packaging material for the container. It comprises an outer layer of the thermoplastic material, a layer of paper substrate and an inner layer of the thermoplastic material. The inner layer comprises a mixture of linear low density polyethylene (LLDPE) and low density polyethylene (LDPE). The mixture has a swelling ratio in the range from 0.9 to 1.2.

EFFECT: invention provides more effective process of laminating and fast heat sealing, whereby the densely and firmly sealed containers are obtained.

15 cl, 3 ex

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