Biaxially oriented polypropylene films

FIELD: polymer materials.

SUBSTANCE: invention relates to technology of making oriented synthetic films and, specifically, to biaxially oriented polypropylene films, which invention may be utilized in manufacture of food packaging materials. Film is formed from at least polypropylene (co)polymer containing at least 0.8 wt % ethylene and optionally one or several C4-C10-α-olefins or from polypropylene composition containing at least 0.8 wt % one or several comonomers selected from ethylene and C4-C10-α-olefins. (Co)polymer or polymer composition have melting point above or equal to 155°C and less than 3 wt % fraction soluble in xylene at ambient temperature. Weight ratio of polymer fraction collected within temperature range 25 to 95°C to above-mentioned xylene-soluble fraction is superior to 8.

EFFECT: improved physicochemical properties of biaxially oriented polypropylene films.

7 cl, 1 dwg, 6 tbl, 9 ex

 

The present invention relates to improved devuono-oriented polypropylene films (war) based on the specific type of propylene polymer or polymer composition.

Compared to worr made of propylene homopolymers and copolymers with similar MFR, films of the present invention provide the best balance of characteristics extraction at elevated temperature and physical properties. Thus, when the same or even a lower temperature exhaust oriented films of this invention find superior properties, such as stiffness and kislotonepronitsaemost.

In addition, if the copolymer composition used for war, in accordance with the prior art, they are usually used for layers subjected to welding (surface layers), and at higher concentrations of the fractions soluble in hydrocarbon solvents, in General good properties (in particular, the ability to weld, as shown, for example, in the US A 5780168. However, the increased content of fractions soluble in the solvent, make the film unsuitable for use in food packaging.

Currently, it was found that the correct choice of some of the characteristic properties of the material of the propylene polymer obtained Warr with excellent odnymi properties and a low content of fractions, soluble in the solvent.

Therefore, the present invention relates to devuono-oriented polypropylene films war, in which at least one layer contains a propylene polymer containing at least 0.8 wt.% ethylene and possibly one or more4-C10α-olefin, or propylene polymer composition containing at least 0.8 wt.% one or more comonomers selected from ethylene and C4-C10α-olefins, and having the following features:

1) melting point 155°With or above;

2) the content of the fraction soluble in xylene at room temperature (about 25°), less than 3 wt.%, preferably less than 2.5 wt.%, and the value of the ratio of the polymer fraction collected at the temperature range from 25 to 95° (TREF method: fractionation by elution with increasing temperature using xylene), to the number mentioned fraction soluble in xylene exceeds 8 wt.%/ wt.%, preferably more than 10 wt.%/wt.%, more preferably greater than 12 wt.%/ wt.%.

In a preferred implementation, at least one layer essentially made of the above-mentioned propylene polymer or propylene polymer composition.

Mentioned propylene polymer is an article which tistichesky copolymer (I), containing such quantity of co monomer (comonomers), in which the melting point (measured according to the method of DSK, i.e. differential scanning calorimetry) would be equal to 155°s or greater. If the co monomer is present only ethylene, this rate is expected to be in the range from 0.8 to 1.5 wt.% in the calculation of the weight of the polymer. If you will be present With4-C10α-olefins, the content will be in General in the range from 1 to 4 wt.% in the calculation of the weight of the polymer.

Particularly preferred propylene polymer composition (II)containing the first propylene (co)polymer (where the copolymer is a statistical copolymer with ethylene content in the range from 0 to 1.5 wt.% and the second propylene statistical copolymer with ethylene content in the range from 0.8 to 5 wt.%, moreover, the mass ratio of the content of the second copolymer to the contents of the first (co)polymer is in the range from about 20:80 to about 80:20, preferably from 30:70 to 70:30, and the difference in the ethylene content between the two is preferably in the range from 1 to 4 percentage units when calculating the mass in question (co)polymer; or one propylene polymer composition (II)containing the first propylene (co)polymer (where the copolymer before the hat is a statistical copolymer) containing co monomer in the range from 0 to 2 wt.% and the second propylene statistical copolymer with the content of the co monomer in the range from 1.5 to 12 wt.%, moreover, the mass ratio of the content of the second copolymer to the contents of the first (co)polymer is in the range from about 20:80 to about 80:20, preferably from 30:70 to 70:30, and the difference in the content of the co monomer between the two is preferably in the range from 1.5 to 10 percentage units when calculating the mass in question (co)polymer, where the mentioned comonomer selected from C4-C10α-olefins and mixtures thereof, with ethylene is optional. The present invention also relates to the above-mentioned propylene polymer compositions.

The rate of melt flow (MFR in accordance with ISO 1133, 230°C, load of 2.16 kg) of the said propylene polymer or polymer composition is preferably in the range from 1 to 10 g/10 min, more preferably from 1 to 4 g/10 minutes

Other preferred characteristics of the compositions used for the films of the present invention, are:

the rate of polydispersity (PI): from 3.5 to 7, more preferably from 3.8 to 5.

The MFR values of the first propylene (co)polymer in the composition (II) and the second propylene statistical copolymer in the composition (II) may be similar or significantly different.

In a particular implementation of the present invention, the MFR value of the first propylene (co)polymer lower cumshotvidscute is the second propylene statistical copolymer, and the difference values of the MFR is preferably greater than 5 g/10 minutes

With4-C10α-olefins that may be present in the above-mentioned propylene polymer or polymer composition as comonomers, are described by the formula CH2=CHR, where R is an alkyl radical, linear or branched, with 2-8 carbon atoms or aryl (in particular phenyl) radical.

Examples mentioned With4-C10α-olefins are 1-butene, 1-penten, 1-hexene, 4-methyl-1-penten and 1-octene. Particularly preferred 1-butene.

Compositions of the present invention can be obtained by polymerization in one or more stages of polymerization. Such a polymerization is carried out in the presence of stereospecific catalysts of the Ziegler-Natta. A significant component of the above-mentioned catalyst is a solid catalyst component containing compound of titanium, which has at least one link of the titanium-halogen, and an electron-donor compound, both put on a magnesium halide in active form. Another significant component (acetalization) is alyuminiiorganicheskikh connection, such as aluminiumalloy derived.

External donor type is optional.

Catalysts, generally used in this way izaberete the Oia, able to produce polypropylene with a measure of isotacticity greater than 90%, preferably greater than 95%.

Catalysts having the above characteristics, are well known in the patent literature; particularly advantageous are the catalysts described in U.S. patent 4399054 and in the European patent 45977. Other examples can be found in U.S. patent 4472524.

The solid components of catalyst used in the above-mentioned catalysts contain as electron donor (internal donor) compounds selected from the group consisting of ethers, ketones, lactones, compounds containing N atoms, R and/or S, and esters of one - and dibasic carboxylic acids.

Particularly preferred electron-donor compounds are simple 1,3-diesters described by the formula:

where RIand RIIare the same or different and represents a C1-C18alkyl, C3-C18cycloalkenyl or C7-C18aryl radicals; RIIIand RIVare the same or different and represents a C1-C4alkyl radicals; or a simple 1,3-diesters in which the carbon atom in position 2 belongs to a cyclic or polycyclic structure formed by 5, 6 or 7 coal is native atoms, or 5-n or 6-n' carbon atoms and, accordingly, n nitrogen atoms and n' by heteroatoms selected from the group consisting of N, O, S and Si, where n is 1 or 2, a n' is 1, 2 or 3, with the above structure contains two or three unsaturation (cyclopentadiene structure), and she may be condensed with other cyclic structures or substituted by one or more substituents selected from the group consisting of linear or branched alkyl radicals; cycloalkyl, aryl, kalkilya, alkalline radicals and Halogens, or condensed with other cyclic structures and substituted by one or more of the above-mentioned substituents, which may also be associated with the condensed cyclic structures; and one or more of the above-mentioned alkyl, cycloalkyl, aryl, kalkilya or alkalinic radicals and condensed cyclic structure optionally containing one or more heteroatoms as substituents, replacement carbon or hydrogen atoms, or both at once.

Ethers of this type are described in published European patent applications 361493 and 728769.

Representative examples mentioned simple diesters are 2-methyl-2-isopropyl-1,3-dimethoxypropane, 2,2-Diisobutyl-1,3-dimethoxypropane, 2-isopropyl-2-cyclopentyl-1,3-dimethoxy is open, 2-isopropyl-2-isoamyl-1,3-dimethoxypropane, 9,9-bis(methoxymethyl)fluorene.

Other suitable electron-donor compounds are esters of phthalic acid, such as Diisobutyl, dioctyl-, diphenyl -, and benzylbutylphthalate.

Obtaining the above-mentioned catalyst components is carried out in accordance with various methods.

For example, the adduct MgCl2·nROH (especially in the form of spheroidal particles), where n in the General case is in the range from 1 to 3, a ROH represents ethanol, butanol or Isobutanol, is introduced into reaction with excess TiCl4containing electron-donating compound. The reaction temperature in General ranges from 80 to 120°C. thereafter, the solid phase is isolated and again introduced into the reaction of TiCl4in the presence or in the absence of electron-donating compounds, after which it is separated and washed with an aliquot of a hydrocarbon until then, until you have removed all chlorine ions.

In the solid component of catalyst compound of titanium, expressed through Ti, generally present in amounts of from 0.5 to 10 wt.%. The number of electron-donor compounds, which remains fixed on the solid component of catalyst, generally is in the range from 5 to 20 mole% based on dihalogenide magnesium.

The titanium compounds which can be used in the us to obtain a solid component of catalyst, are the halides and halogenoalkane titanium. The titanium tetrachloride is the preferred connection.

The reaction described above, result in the formation of magnesium halide in active form. In the literature there are other reactions that lead to the receipt of a magnesium halide in active form of the magnesium compounds other than halides, such as carboxylates of magnesium.

The active form of the magnesium halide in the solid catalyst component can be identified by the fact that in the x-ray spectrum of the catalyst component reflection with maximum intensity that is present in the spectrum of non-activated magnesium halide (with a value of specific surface area, less 3 m2/g), more is not observed, and in its place appears a halo with the maximum intensity shifted with respect to the position of the reflection with maximum intensity at non-activated dihalogenide magnesium, or the fact that the bandwidth of the reflection with maximum intensity at half the peak height of at least 30% larger than the corresponding parameter to reflect the maximum intensity, which is observed in the spectrum of non-activated magnesium halide. The most active forms are those in which x-ray spectrum of the solid component can produce the RA is observed above the halo.

Among the magnesium halides preferred magnesium chloride. In the case of the most active forms of magnesium chloride in the x-ray spectrum of the solid component of the catalyst is observed halo instead of reflection, which in the spectrum of non-activated chloride observed in 2,56 Å.

Al-alkyl compounds used as socialization include Al-trialkyl, such as Al-triethyl, Al-triisobutyl, Al-tri-n-butyl, and linear or cyclic Al-alkyl compounds containing two or more Al atoms linked to each other through the atoms O or N or groups SO4or SO3.

Al-alkyl compound is in General used in an amount such that the ratio Al/Ti would be in the range from 1 to 1000.

Electron-donor compounds that can be used as external donors include esters of aromatic acids, such as alkylbenzoates, and in particular silicon compounds containing at least one bond of Si-OR, where R is a hydrocarbon radical.

Examples of silicon compounds are (tert-butyl)2Si(och3)2, (cyclohexyl)(methyl)Si(och3)2,(phenyl)2Si(och3)2and (cyclopentyl)2Si(och3)2. Simple 1,3-diesters described above formulas can also be used with the ode. If the internal donor is one of these simple diesters, external donors and can not be used.

In particular, even if lead to the production of polymers and polymer compositions having the previously mentioned features 1) and 2)will be able and many other combinations of the aforementioned catalyst components, statistical copolymers preferably obtained using catalysts containing phthalate as internal donor and (cyclopentyl)2Si(och3)2as an external donor or mentioned simple 1,3-diesters as internal donors.

As mentioned earlier, the method of polymerization can be implemented in one or in several stages. In the case of the composition (II) it can be implemented in at least two successive stages, where the first propylene (co)polymer and a second propylene statistical copolymer receive on separate consecutive stages, conducting the reaction at each stage except the first stage, in the presence of the polymer formed at the previous stage, and the catalyst used therein. Obviously, if the composition (II) will contain additional (co)polymers, for their production will be necessary to add an additional stage of polymerization. Mentioned stage polymerization can be done in R is zdalnych risers or in one or more risers, in which will be created gradients of the concentrations of the monomer and the conditions of the polymerization. The catalyst in the General case, add only at the first stage, but its activity is such that it remains active for all subsequent stages (the stage).

The regulation of the molecular weight is performed using known regulators, in particular hydrogen.

The correct dosing concentration of the molecular weight regulator at appropriate stages receive the previously described MFR values.

The whole process of polymerization, which may be continuous or periodic, implement, following known methods and conducting the reaction in the liquid phase, in the presence or in the absence of an inert diluent, or in gas phase, or by using techniques for gas-liquid mixed phase.

Time, pressure and temperature of the reaction in two stages are not critical moments, but in samolocik case, the temperature will be in the range from 20 to 100°C. the Pressure can be atmospheric or higher. The catalysts can be pre-entered in contact with small quantities of olefin (terpolymerization).

You can also use a method of catalytic polymerization in the gas phase, implemented at least in two the relationship is these areas polymerization, moreover, the method includes applying under the reaction conditions of one or more monomers in the above-mentioned polymerization zone in the presence of the catalyst and removal of the polymer product of the above-mentioned polymerization zones, in this way the growing polymer particles flow upward through one of the said polymerization zones (vertical riser to lift) in the fast fluidization, leave mentioned vertical riser to lift and enter another area of polymerization (vertical riser for descent)through which they flow downward under the action of gravity, leave mentioned vertical riser to descend and come back to a vertical riser to lift, creating that the circulation of polymer between the vertical riser to lift and vertical riser for descent, and the method may differs in that:

- available tools that can completely or partially prevent the gas mixture present in the vertical riser to lift in a vertical pipe for a descent, and

- a vertical pipe for a descent injected gas and/or liquid mixture with a composition different from the composition of the gaseous mixture present in the vertical riser to lift.

This method of polymerization is illustrated in WO 00/02929.

In accordance with a particularly advantageous variant of p is the implementation of this method the introduction of a vertical standpipe for draining the gas and/or liquid mixture with the composition, different from the composition of the gaseous mixture present in the vertical riser to lift, effectively prevents the latter mixture in a vertical riser for the descent.

Composition (II) can also be obtained, obtaining mentioned (co)polymers separately, carrying out the reaction with the same catalysts and essentially in the same polymerization conditions as described above (except that the above-mentioned (co)polymers will receive at separate stages of polymerization), and then mechanically mixing mentioned (co)polymers in the molten state. Can be used in conventional mixing apparatuses, such as screw extruders, in particular twin-screw extruders.

Propylene polymers and propylene polymer compositions used for the films of the present invention, can also contain additives commonly used state of the art, such as antioxidants, light stabilizers, heat stabilizers, nucleating, dyes and fillers.

In particular, the addition of nucleating leads to a significant improvement of important physico-mechanical properties such as modulus of elasticity in bending, heat resistance (HDT), the yield strength and transparency.

Common examples of nucleating are n-tert-butylbenzoate 1,3 - and 2,4-dibenzylidene.

The nucleating preferably added in amounts in the range from 0.05 to 2 wt.%, more preferably from 0.1 to 1 wt.% in the calculation of the total mass.

The addition of inorganic fillers such as talc, calcium carbonate, and mineral fibers, also leads to an improvement in certain mechanical properties, such as modulus of elasticity in bending and HDT. Talc can also act as a nucleating agent.

Sector application of the present invention is the sector of devuono-oriented films, often called film Warr (devuono-oriented polypropylene films).

The film of the present invention can be obtained using well-known methods of obtaining war, for example, in the stretching frame or razuki sleeve film.

In the method of stretching in the frame of the molten polymer material is continuously expanded through a narrow slot. Extruded molten material is pulled out of the slot and cool, then heat up again and stretch in the longitudinal direction (MD), using the General case of heated rollers, and in the transverse direction (TD) using a frame for stretching and orienting the film.

In the way of razuki sleeve film of molten polymer material is expanded through the slot in the form of district the tee to get the pipe. The film can be stretched in the longitudinal and transverse directions.

In both ways the film in conclusion, it can be treated by annealing (termowizyjne).

The thickness of the films of the present invention in General less than 250 μm, preferably less than 100 μm. They can be single-layer or multilayer films.

In multilayer films, it is preferable that at least the base layer (also called "carrier layer") would contain mentioned propylene polymer or a propylene polymer composition having features 1) and 2). Another layer may contain other types of polymers.

Examples of olefin polymers, which can be used for the other layers are polymers or copolymers, and mixtures thereof, olefins CH2=CHR, where R represents a hydrogen atom or a C1-C8alkyl radical.

Particularly preferred are the following polymers:

a) isotactic or mainly isotactic propylene the homopolymers and homopolymers or copolymers of ethylene, such as HDPE, LDPE, LLDPE;

b) crystalline copolymers of propylene and ethylene and/or C4-C10α-olefins, such as, for example, 1-butene, 1-hexene, 4-methyl-1-pentene, 1-octene, where the full content of the co monomer is in the range from 0.05 to 20 wt.% per the Assu copolymer, or mixtures of the above-mentioned copolymers with isotactic or mainly isotactic propylene homopolymers;

c) elastomeric copolymers of ethylene and propylene and/or C4-C10α-olefin, optionally containing minor quantities (in particular from 1 to 10 wt.%) diene, such as butadiene, 1,4-hexadiene, 1,5-hexadiene, ethylidene-1-norbornene;

d) heterophase copolymers containing a propylene homopolymer and/or one of the copolymers of item b) and an elastomeric fraction containing one or more copolymers of paragraph (C), normally produced in accordance with known methods by mixing the components in the molten state or in the step of polymerization and containing the aforementioned elastomeric fraction in amounts from 5 to 80 wt.%;

e) 1-butenova the homopolymers or copolymers with ethylene and/or other α-olefins.

Examples of polymers other than polyolefins, applicable to the other layers, are polystyrenes, polyvinylchloride, polyamides, polyesters, and polycarbonates.

In conclusion, the film of the present invention can be subjected to a series of subsequent operations, such as:

embossed on the surface by heating the surface pinning her to the roller for embossing;

print p is the following, as the surface will be given the receptivity to inks as a result of processing by oxidation (for example, in a flame) or ionizing radiation (for example, treatment by corona discharge);

connection with fabric or plastic, especially polypropylene, as a result of heating surfaces and cuddling;

joint extrusion with other polymeric or metallic material (e.g. aluminum foil);

treatment with a metal coating (e.g., deposition of an aluminum layer by evaporation in a vacuum);

applying an adhesive layer on one or both surfaces of the film with obtaining thus an adhesive film.

Depending on the particular type of film and the final film processing of the present invention can find many applications, the most important of which is the packaging of goods and food products.

To illustrate the present invention but not to limit, the following further examples.

Data related to polymeric materials and the films of examples were determined using the methods described below.

- MFR:ISO 1133, 230°C, 2,16 kg;

the melting temperature, enthalpy of melting and the curing temperature: method DSK when the temperature is 20°min;

the ethylene content: according to the method of the K-spectroscopy;

- modulus of elasticity in bending: ISO 178.

The rate of polydispersity (PI): a measure of the molecular mass distribution of the polymer. In order to determine the value of PI at a temperature of 200°conducted With the definition of separate modules with a low modulus value, for example, at 500 PA, using the model plastometer with parallel plates RMS-800 shipped to market by Rheometrics (USA), carrying out the measurement when the oscillation frequency which increases from 0.01 to 100 rad/second. From the value of the separation modules PI can be obtained using the following equation:

PI=54,6×(separation modules)-1,76,

where separation modules (MS) was defined as:

MS=(frequency at G'=500 PA)/(frequency at G"=500 PA)

where G' is the storage modulus, a G" is the loss modulus.

The fractions of soluble and insoluble in xylene at 25°S: 2.5 g of the polymer under stirring was dissolved in 250 ml of xylene at 135°C. after 20 minutes the solution was left to cool to 25°S, still under stirring, and then left to settle for 30 minutes. The precipitate was filtered using filter paper, the solution was evaporated under nitrogen atmosphere and the residue was dried in vacuum at 80°until reaching constant weight. Thus was calculated mass percentage of polymer soluble nerastvorim at room temperature (25° C).

TREF.

Approximately 1 g of sample was dissolved in 200 ml of o-xylene, stabilized with 0.1 g/l Irganox 1010 (pentaerythritoltetranitrate-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate). The temperature of dissolution was in the range of 125-135 mA°C. the Resulting solution was poured into a column Packed with glass beads, and then slowly cooled over 16.5 hours to 25°C.

The first fraction was obtained at room temperature when the elution o-xylene. The second fraction was collected after increasing the temperature of the column up to 95°C. the Polymer component soluble in the range between 25 and 95°With, was collected as one fraction.

Subsequent fractions were obtained by elution o-xylene at that time, as the temperature is linearly increased in the range from 95 to 125°C. Each fraction extracted in the form of a solution volume of 200 ml were collected at a temperature in increments of 1°C. the Polymer fraction was then planted with acetone, filtered on a filter of PTFE hole size of 0.5 μm, was dried in vacuum at 70°C and weighed.

Examples 1 and 2 and comparative example 1.

The polymers of examples 1 and 2 were obtained in the polymerization of propylene and ethylene in a continuous mode at the facility, including apparatus for gas-phase polymerization.

In the apparatus for gas-phase polymerization of Padova and the catalyst. The apparatus consisted of two interconnected cylindrical riser, the vertical riser for lifting and vertical riser for descent. The terms of fast fluidization was installed in the pipe for a rise in the recirculation gas from the separator gas and solid phase.

Way of how to make different compositions of gases in two vertical struts, was a "barrier" submission. This thread was the submission of propylene in the more voluminous the upper part of the vertical riser for the descent.

The used catalyst containing catalyst component obtained by analogy with example 5 of EP AND 728769, but when using microspheroidal MgCl2·1,7C2H5HE instead MgCl2·2,1 C2H5OH.

This component of the catalyst used together with dicyclopentadienyliron as an external donor and triethylaluminium (TEAL). The mass ratio TEAL/component catalyst was equal to 5; the mass ratio TEAL/external donor was equal to 4. Other operating conditions and characteristics of the obtained polymers are shown in table 1.

The main features of conventional propylene polymer to worr are shown in table 1 for comparative example 1.

Table 1
Example1 2Comparative example 1
The first component
Temperature°8585-
Divisionwt. -%≅50≅50-
C2/(C2+C3)mol/mol0,0010,001-
The second component

P.I.
Divisionwt. -%≅50≅50-
C2/(C2+C3)mol/mol0,010,01-
MFR "L"g/10 min1,51,51,8
The content C2wt%.1/41,30
The content of fraction insoluble in xylenewt.%97,398,195,5
The content of fraction soluble in xylenewt.%2,71,94,5
The content of the fraction soluble at the temperature: 25-95°wt.%34,330,315,9
4,424,434,8
The modulus of elasticity in bendingMPa150015001600
The melting temperature according to the method of DSC°158,7158,6165/1
The enthalpy of melting method DSCJ/g96,7for 95.394,8
The curing temperature according to the method of DSC°106,6107,4112,6
Film casting 50 microns
Turbidity%8,58,4-
Gloss 60°%58,559-
Fisheye >0.2 mmn°/m2230190200

Fish eye 0,5-0, 7mmn°/m2442
Fish eye 0,7-1, 5 mmn°/m2100
Fisheye >1.5 mmn° /m2000

Note:

The first component of = the polymer obtained in the vertical riser for the descent.

The second component of = the polymer obtained in the vertical riser to lift.

Division = the number of the obtained polymer;

wt.% = wt.%;

C2 = ethylene;

C3 = propylene;

C2/(C2+C3) = the ratio of monomers in the feed.

The polymers of these examples stretched along two axes at different temperatures in laboratory exhaust device TM-long. The drawing shows a biaxial stress of plastic flow, measured at the exhaust device for films TM-long, depending on the temperature of the extrusion. With respect to comparative example 1, the polymers of examples 1 and 2 show significantly lower values biaxial tension plastic flow and the lower the temperature of the exhaust.

Examples 3 to 5 and comparative example 2.

The polymers from examples 1 and 2 was obtained in the same conditions as in examples 1 and 2. Other operating conditions and characteristics of the obtained polymers are shown in tables 2 and 3.

The main features of conventional propylene polymer to worr are shown in tables 2 and 3 for comparative example 2.

Table 2
Example345Comparative example 2
The first component
Temperature°858888-
Divisionwt.%≅50≅50≅50-
C2/(C2+C3)mol/mol0,001<0,001<0,001-
The second component
Divisionwt.%≅50≅50≅50-
C2/(C2+C3)mol/mol0,0130,0150,01-
MFR "L"g/10 min1,72,01,71,8
The content C2 wt.%1,11,61,2≅0,6
The content of fraction insoluble in xylenewt.%of 98.297,498,194,5
The content of fraction soluble in xylenewt.%1,82,61,95,5
I.V. (characteristic viscosity)DL/g2,582,452,37-
P.I.4,754,554,754,6
The modulus of elasticity in bendingMPa1475125515351385
The melting temperature according to the method of DSC°159,2157,5160,2of 161.7
The enthalpy of melting method DSC J/g99,994,3101,8to 91.6
The curing temperature according to the method of DSC°109,8104,3107,8107,1
Table 3
The content of the fraction soluble at the temperature:
The polymer from exampleI.V.25-95°95-115°Tp
(DL/g)(wt.%)(wt.%)(°)
32,5822,676,1107
42,4550,948,0105
52,3727,271,1106
uravnitelny example 2 -27,667,6107

Tr is the temperature of the elution, the corresponding maximum peak on the curve of temperature rise elution fractionation. Curve TREF.

Of polymers of these examples were given samples of the films war with the structure a-b-a and with a thickness of 20 μm. The surface layers were composed of the same polymer as the core. The degree of stretching in the longitudinal direction was set to 5 ·1,1, and the degree of stretching in the transverse direction was in the range of from 8.3 to 8.5.

In order to determine the technological properties of various grades, assessed the way. For each polymer was determined thickness profile, the ability to extract and the amount of destruction during processing.

Properties of films shown in table 4.

Table 4

The polymer from exampleMinimum RNT (°)Profile thickness (standard deviation)The young's modulus (MPa)WVTR (g/m2/day)OTR (CC/m2/day)Turbidity
Longitudinal directionTransverse direction
3 150,50,0285250±152390±20a 4.916200,93±0,08
4145being 0.0365040±352250±305,019700,64±0,08
5139,50,0304260±552050±206,222600,59±0,07
Comparative example 21450,0484760±502150±405,522100,67±0,05

Minimum RNT (preheating temperature) in the transverse direction is a key parameter used to determine the technological properties. Minimum RNT is the lowest temperature of the exhaust in the preheating zone for drawing in the transverse direction, which can be reached before the occurrence of fracture without streaks hood. A common point of view regarding war is that brand, which can be processed at low RNT, in the General case will have better processing properties. Manufacturers Warr even indicate that such brands in General will have the best technologist is ical properties on high-speed production lines vorr.

Profile thickness was controlled by tracking the variation in the film thickness (2σ) depending on time. Variations in thickness were recorded for all the samples in a period of approximately 30 minutes. If you look at the data, it becomes clear that all the polymers representing this invention have a more uniform thickness profile in comparison with the same property for material comparison (comparative example 2).

For all materials subject to this study, no damage was observed.

The characterization of the film includes the determination of optical, mechanical properties and gas-tightness.

The mechanical properties of the films were measured in the longitudinal and transverse directions. The work was carried out on the Instron instrument in accordance with ASTM 882. The rate of passage of oxygen (OTR) and water vapor (WVTR) was measured for all polymers subjected to this study. OTR was measured at room temperature, equal to 23°With, at a relative humidity of 60-70%. WVTR was determined under the same test conditions, but at a relative humidity of 90%.

The polymer of example 4 had the best overall processing properties and mechanical properties and ageing almost at the level of properties of the material of comparative example 2.

Poly is a career of examples 3 and 5 were characterized by temperature processing, similar to the corresponding temperature for comparative example 2, when the best mechanical properties and gas-tightness. The polymers of examples 2 to 4 have found a more uniform thickness profile in comparison with the material of comparative example 2.

Example 6 and comparative example 3.

The polymer of example 6 was obtained under the same conditions as in examples 1 and 2.

Other operating conditions and characteristics of the obtained polymers are shown in table 5.

The main features of conventional propylene polymer to war are given in table 5 for comparative example 3.

Table 5
Example6Comparative example 3
The first component
Temperature°85-
Divisionwt.%≅50-
C2/(C2+C3)mol/mol0,001-
The second component
Divisionwt.%≅50-
mol/mol0,01-
MFR "L"g/10 min1,53,5
The content C2wt.%1,40
The content of fraction insoluble in xylenewt.%97,395,5
The content of fraction soluble in xylenewt.%2,74,5
The content of the fraction soluble at the temperature: 25-95°wt.%34,321
P.I.4,425,5
The modulus of elasticity in bendingMPa15001490
The melting temperature according to the method of DSC°158,7of 160.4
The enthalpy of melting method DSCJ/g96,7for 95.2
The curing temperature according to the method of DSC° 106,6to 107.7
Film casting 50 microns
Turbidity%8,516,7
Gloss 60°%58,534,4
Fisheye >0.2 mmn°/m2230200
Fish eye 0,5-0,7 mmn°/m242
Fish eye of 0.7-1.5 mmn°/m210
Fisheye >1.5 mmn°/m200

A test similar to that described in example 1 was conducted for the pilot line for the production of war. With respect to comparative example 3, the polymer of example 6 was found slightly lower minimum temperature preheating and improved mechanical and optical properties. With respect to comparative example 1 polymer of example 6 found a similar mechanical properties and a significantly lower minimum temperature before alternova heat.

Thus, the polymers used in the films of the present invention, compared with conventional polymers with essentially the same MFR differ significantly improved balance of conduct for drawing at elevated temperatures and mechanical properties of oriented films made from them.

The results are shown in table 6, which also shows and film properties obtained as a result of processing under the same conditions, the polymer of comparative example 1.

Table 6
The polymer from exampleMinimum RNT (°)The young's modulus (MPa)Turbidity
Longitudinal directionTransverse direction
6150203635661,03
Comparative example 115420263617-
Comparative example 3152202233921,36

1. Devuono-oriented polypropylene film, which has at least one layer contains a propylene (co)polymer (I)containing at least 0.8 wt.% ethylene and perhaps one is whether multiple C 4-C10α-olefin, or propylene polymer composition (II)containing at least 0.8 wt.% one or more comonomers selected from ethylene and C4-C10α-olefins, and the above-mentioned polymer or polymer composition has the following characteristics:

1) melting point 155°With or above;

2) the content of the fraction soluble in xylene at room temperature, about 25°With less than 3 wt.%, and the value of the ratio of the polymer fraction collected at the temperature range from 25°to 95°With the number of fraction soluble in xylene at room temperature greater than 8 wt.%/wt.%.

2. Devuono-oriented polypropylene film according to claim 1, where the rate of melt flow (MFR in accordance with ISO 1133, 230°C, load of 2.16 kg) of the said propylene polymer or polymer composition is in the range from 1 to 10 g/10 minutes

3. Devuono-oriented polypropylene film according to claim 1, where at least one layer contains a propylene statistical copolymer (I), in which, if the co monomer is present only ethylene, it is contained in the range from 0.8 to 1.5 wt.% in the calculation of the weight of the polymer, if present4-C10α-olefins, the content in General will be in the range from 1 to 4 mA is.% in the calculation of the weight of the polymer.

4. Devuono-oriented polypropylene film according to claim 1, where at least one layer contains a propylene polymer composition (II)containing the first propylene (co)polymer, where the copolymer is a statistical copolymer with ethylene content in the range from 0 to 1.5 wt.% and the second propylene statistical copolymer with ethylene content in the range from 0.8 to 5 wt.%, moreover, the mass ratio of the content of the second copolymer to the contents of the first (co)polymer is in the range from about 20:80 to about 80:20, and the difference in the ethylene content between the two copolymers preferably is in the range from 1 to 4% when calculating the mass in question (co)polymer.

5. Devuono-oriented polypropylene film according to claim 1, where at least one layer contains a propylene polymer composition (II)containing the first propylene (co)polymer, where the copolymer is a statistical copolymer with the content of the co monomer in the range from 0 to 2 wt.% and the second propylene statistical copolymer with the content of the co monomer in the range from 1.5 to 12 wt.%, moreover, the mass ratio of the content of the second copolymer to the contents of the first (co)polymer is in the range from about 20:80 to about 80:20, and the difference in the content of the co monomer between two sprinklers the measures is preferably in the range from 1.5 to 10% when calculating the mass in question (co)polymer, where mentioned comonomer choose from With4-C10α-olefins and mixtures thereof, with ethylene is optional.

6. Propylene polymer composition comprising a first propylene (co)polymer, where the copolymer is a statistical copolymer with ethylene content in the range from 0 to 1.5 wt.% and the second propylene statistical copolymer with ethylene content in the range from 0.8 to 5 wt.%, moreover, the mass ratio of the content of the second copolymer to the contents of the first (co)polymer is in the range from about 20:80 to about 80:20, and the difference in the ethylene content between the two copolymers preferably is in the range from 1 to 4% when calculating the mass in question (co)polymer, and said composition has the following characteristics:

1) melting point 155°With or above;

2) the content of the fraction soluble in xylene at room temperature, about 25°With less than 3 wt.%, and the value of the ratio of the polymer fraction collected at the temperature range from 25°to 95°With the number of fraction soluble in xylene at room temperature greater than 8 wt.%/wt.%.

7. Propylene polymer composition comprising a first propylene (co)polymer, where the copolymer is statistices the first copolymer with the content of the co monomer in the range from 0 to 2 wt.% and the second propylene statistical copolymer with the content of the co monomer in the range from 1.5 to 12 wt.%, moreover, the mass ratio of the content of the second copolymer to the contents of the first (co)polymer is in the range from about 20:80 to about 80:20, and the difference in the content of the co monomer between the two copolymers preferably is in the range from 1.5 to 10% when calculating the mass in question (co)polymer, where the mentioned comonomer choose from With4-C10α-olefins and mixtures thereof, with ethylene is optional, and said composition has the following characteristics:

1) melting point 155°With or above;

2) the content of the fraction soluble in xylene at room temperature, about 25°With less than 3 wt.%, and the value of the ratio of the polymer fraction collected at the temperature range from 25°to 95°With the number of fraction soluble in xylene at room temperature greater than 8 wt.%/wt.%.



 

Same patents:

FIELD: composite materials on base of thermoplasts; injection molding of various parts, parts for railway engineering in particular: insulating bushes and locks of contact system, elastic insulating gaskets on wooden and concrete sleepers and busbars for switches.

SUBSTANCE: proposed polymer composition contains polyolefin, crumb rubber, synthetic ethylene propylene rubber and filler for micro-spheres from smoke emissions of thermal power plants; it also contains lubricant as additive. Mineral or vegetable oil at boiling temperature not below 180°C or low-molecular diane resins may be used as lubricant. Besides that, filler may contain talc. Use of smoke emissions of thermal power plant of preset composition and combination of components at definite ratio makes it possible to obtain molding compositions possessing high wear resistance, water resistance and oil resistance, low abradability at retained elasticity; increased service life.

EFFECT: enhanced efficiency.

4 cl, 2 tbl, 7 ex

FIELD: polymers.

SUBSTANCE: ethylenepropylene copolymer-base composition comprises dicumyl peroxide, bis-(tert.-butylperoxyisopropyl)benzene or 1,1-di-tert.-butylperoxy-3,3,5-trimethylcyclohexane as an organic peroxide and vinyltri-(methoxyethoxy)silane or polyphenylethoxysiloxane as an organosilicon additive. Except for, the composition comprises additionally a vulcanization co-agent taken among the group including low-molecular polybutadiene with the content of 1,2-links 20-80%, trimethylolpropane-trimethacrylate, triallyl cyanurate and quinone dioxime-1,4. Also, the composition comprises stearin, paraffin and zinc oxide. The composition shows high physical-mechanical properties, oil-resistance and dielectric properties. Invention can be used, in particular, in cable industry.

EFFECT: valuable properties of composition.

2 cl, 3 tbl, 8 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to polyethylene molding mass with multimodule molecular weight distribution intended to manufacture hollow articles such as gas tanks, canisters, barrels, and bottles using extrusion. Molding mass has density at least 0.940 g/cm3, contains low-molecular polyethylene with viscosity index 40-150 cm3/g in amount 30 to 60%, high-molecular copolymer of ethylene with another C4-C10-olefin with viscosity index 150-800 cm3/g in amount 30 to 65%, and ultrahigh-molecular polyethylene with viscosity index in the region 900-3000 cm3/g in amount 1 to 30%. Molding mass is prepared by cascade-based suspension polymerization.

EFFECT: increased degree of blowing and improved balance between hardness and fissuring resistance.

3 cl, 2 tbl, 5 ex

FIELD: road, industrial and civil building, in particular sealing and hydraulic insulating material.

SUBSTANCE: invention relates to industrial method for production of modified bitumen mastic. Claimed bitumen-polymer material contains (mass %) oil bitumen 60-70; synthetic resin 2-10; oil solvent and/or black oil 18-30; sulfur-containing compounds 0.5-5.0; and additionally oxyethylated alkylphenol as surfactant 0.1-5.0. Sulfated mixture of oil bitumen, synthetic resin, oil solvent and/or black oil treated for sulfitation at 140-2300C is used as sulfur-containing compounds. Method for production of said material also is disclosed.

EFFECT: polymer-modified bitumen mastic and sealing of improved quality; method for production of increased capability; inexpensive raw materials; energy-conversation technology.

6 cl, 3 ex, 4 tbl, 1 dwg

The rubber mixture // 2241010
The invention relates to rubber industry and can be used in aggressive environments, in particular in the communication system for the manufacture of bushings for the suspension of the self-supporting fiber optic cables

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The invention relates to the field of compositions based on petroleum bitumen, rubber, used in construction, waterproofing, repair of concrete and asphalt pavements, Gulf of cracks in them, sealing, corrosion protection, construction of the roof

The invention relates to the manufacturing of artificial leather and can be used in the manufacture of materials for technical use, operated for a long time outdoors, especially in conditions of high humidity

FIELD: polymer materials.

SUBSTANCE: method is implemented via consecutively effecting sublimation and pyrolysis of cyclic dimer 1,1,2,2,9,9,10,10-octafluori[2.2]paracyclophane in three-zone reactor, including sublimation zone, pyrolysis zone, and condensation zone, at residual pressure 0.001 to 0.1 mm Hg to form α,α,α',α'-tetrafluoro-p-xylylene, which is the subjected to condensation and supported polymerization at temperature from -40°C to +25°C to form film followed by heat processing thereof into porous film. According to invention, sublimation is carried out at 30 to 260°C, pyrolysis at 450-650°C, and heat processing is effected in two steps: first at 30-260°C for 10-1440 min until content of residual cyclic dimer achieves 3.0-5.0% of the mass of film and then at 430-480°C for 15-120 min until content of residual cyclic dimer drops below 0.05% of the mass of film. Process is conducted at flow velocity of cyclic dimer from sublimation zone to pyrolysis zone ranging from 0.005 to 10 g/min and film formation rate upon polymerization between 0.22 and 0.88 μm/min.

EFFECT: optimized process parameters.

3 cl, 6 ex

FIELD: polymer production.

SUBSTANCE: invention relates to high-fluidity propylene block copolymers consisting of propylene homopolymer (50-80%) and propylene copolymer, in which propylene is copolymerized with 10-70% of other than propylene C2-C8-alk-1-ene, (20-50%). Process cos4 gas-phase two-stage polymerization in presence of Ziegler-Natta catalyst. In the first polymerization stage, propylene is polymerized at pressure 10 to 50 bar, temperature 50 to 100°C, and average reaction time 0.3 to 5 h in presence of at least 2.0 vol % of hydrogen based on total volume. Thus obtained propylene homopolymer is sent along with Ziegler-Natta catalyst system to intermediate vessel, wherein first pressure is lowered for 0.01 to 5 min to below 5 bar at temperature 10 to 80°C and then gas mixture is compressed to raise pressure to 5-60 bar. Propylene homopolymer subjected to intermediate decompression in intermediate vessel is then sent along with Ziegler-Natta catalyst system to the second polymerization stage, wherein, at pressure 10 to 50 bar, temperature 50 to 100°C, and average reaction time 0.5 to 5 h, propylene homopolymer is copolymerized with propylene/C2-C8-alk-1-ene mixture. Weight ratio of first-stage and second-stage reacted monomers is maintained between 4:1 and 1:1. High-fluidity propylene block copolymers are useful in manufacture of films, fibers, and molded products.

EFFECT: optimized process conditions.

3 cl, 5 tbl

FIELD: paper-and-pulp industry.

SUBSTANCE: pulp for manufacturing lyocell fiber comprises processed alkali cellulose paste containing hemicellulose in amount at least 7% and cellulose having median degree of polymerization between about 200 and about 1100, copper number about 2.0,w herein more than 4% of pulp fibers have length-weighted average fiber length below 2.0 mm. Lyocell fiber comprises above-defined hemicellulose. Process for preparing composition to be converted into Lyocell fiber comprises boiling in boiler to produce alkali pulp wherein feed contains sawdust in amount between 0 and 100% and contacting alkali pulp containing cellulose and at least about 7% of hemicellulose, under alkaline conditions, with oxidant in amounts high enough to lower average cellulose polymerization degree from about 200 to about 1100 without decrease in content of hemicellulose in pulp to below about 50% or significant increase of copper number to above about 100%.

EFFECT: enabled preparation of rapidly dissolving compositions.

80 cl, 6 dwg, 2 tbl, 3 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to plastics processing, in particular to fabrication of thermally shrinkable electronically and chemically modified tape designed for use in composite coatings based on mastic materials for anticorrosive insulation of various-destination steel main pipelines and in repair of pipeline coating. Fabrication of tape comprises extrusion of polyethylene composition, calendaring, electronic-chemical modification involving irradiation by accelerated electron stream (effected to absorption of dose 5-10 Mrad) and longitudinal orientation by 3-10% at 60-85°C. Wrap tape is characterized by content of gel fraction 40-54%, degree of shrinkage 3-6%, rupture strength 14.9-15.7 MPa, and breaking elongation 335-380%.

EFFECT: improved performance characteristics of tape.

1 tbl, 11 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to technology of manufacturing conducting polymer films and coatings (layers) for use in electrical engineering, electronics, and optoelectronics. Provided heat-resistant polymer layer contains iodine-doped polymer layer based on 1-amino-9,10-anthraquinone and showing conductivity from 10-2 to 102 Ω-1cm-1. Indicated layer is prepared by polymerization of 1-amino-9,10-anthraquinone vapors at reduced pressure under cathodic direct current discharge at preferred temperature between 150 to 300°C, which ensures required vapor pressure over a period of time preferably 5 to 30 min, sufficient to achieve required layer thickness at any combination of polymerization process parameters. Thus formed layer is doped with iodine vapors. Discharge current intensity ranges from 5 to 100 mA, preferably 15 to 30 mA.

EFFECT: optimized polymer layer preparation parameters.

7 cl, 1 tbl

FIELD: cellulose fibers treated with oil and compacting agent for modifying properties of fibers; methods of production of cellulose fibers.

SUBSTANCE: cellulose sheet includes: cellulose fibers, oil applied on cellulose fibers; oil is present in the amount of about 0.5 to 20 mass-% of mass of dry fibers and modifying agent applied on cellulose fibers; modifying agent is present in the amount of about 0.5 to 20 mass-% of active agents of dry mass of fibers. Method of production of cellulose sheet includes: preparation of cellulose mass, molding cellulose sheet from this mass, application of oil on cellulose sheet; oil is present on fibers in the amount of about 0.5 to 20 mass-% of mass of dry fibers and application of modifying agent on cellulose fibers; modifying agent is present in the amount of about 0.5 to 20 mass-% of active agents of dry mass of fibers. Method of production of compacted cloth of cellulose fibers includes: making cellulose fibers treated with oil and modifying agent which modifies properties of compacting the cellulose fibers; cellulose fibers treated with oil and modifying agent contain about 0.5 to 20 mass-% of active agents of dry mass of cellulose fibers; method includes also separation of cellulose fibers treated with oil and compacting modifying agent, molding separated cellulose fibers treated with oil and modifying agent into cloth and compression of cloth. Method of modifying properties for compacting of cellulose fibers includes treatment of fibers with oil; before treatment of cellulose fibers with oil and after application and removal of compressive load they are compacted to first specific mass; then cellulose fibers are compacted to second specific mass after application and removal of compressive force; first specific mass exceeds second specific mass; this method includes: application of modifying agent on fibers treated with oil; this modifying agent modifies properties of fibers for compacting; it is applied on cellulose fibers in the amount of about 0.5 to 20 mass-% of active agents of dry mass of cellulose fibers; modifying agent is applied on fibers treated with oil in the amount sufficient for compacting the fibers to third specific mass after application and removal of compressive load; third specific mass is more than first specific mass. Article for absorption of aqueous fluid medium includes: super-absorbing materials and oil applied on cellulose fibers in the amount of about 0.5 to 20 mass-% of mass of dry fibers and modifying agent applied on cellulose fibers in the amount sufficient for presence of active agents in the amount of about 0.5 to 20 mass-% of dry mass of cellulose fibers.

EFFECT: possibility of retaining super-absorbing materials in structures.

38 cl, 3 dwg, 1 tbl

FIELD: polymer materials.

SUBSTANCE: invention relates to process of preparing antimicrobial polymer material that can be used in medicine, food processing and light industries, in agriculture, and in domestic sphere to manufacture textile materials, nonfouling film, and a variety domestic articles (disposable ware, bottles, glasses, and the like) wherein antimicrobial properties are desirable, fungi-resistant rubber, acrylate-based disinfecting flocculants, hygienic facilities, and so on. Material consists of 0.1-2.0% polyguanidine compound, 0.1-2.0% dimethyl-bis(4-phenylaminophenoxy)silane, 0.05-2.0% organic acid, and polymer component (the balance). Polyguanidine compound is selected from polyhexamethyleneguanidine chloride, phosphate, citrate, lactate, sorbate, and benzoate; poly(4,9-dioxadodecanguanidine) phosphate, polyhexamethylenebiguanide chloride, and polyhexamethylenebiguanide phosphate. Organic acid utilized can be citric, lactic, succinic, or benzoic acid. Polymer compound can selected from high- or low-density polyethylene or polypropylene, or their mixture, copolymers of ethylene with propylene or higher olefins, shock-resistant polystyrene, polyacrylic acid, polyamide, polyethylene terephthalate, polypeptide, cellulose, cellulose, polyvinylchloride, vinylene dichloride copolymers, butadiene/styrene copolymer, polyacrylonitrile, and hydrolyzed polyacrylamide. Material additionally contains a dye.

EFFECT: simplified polymer material manufacture technology, increased protective, antibacterial, antioxidant, antimoldy, algaecide, and antiyeast activities.

6 cl, 6 tbl, 19 ex

FIELD: organic chemistry, polymers, chemical technology.

SUBSTANCE: invention relates to new high-molecular cross-linked polyvinyl butyrals, to a method for their synthesis and to their applying also. Invention describes high-molecular cross-linked polyvinyl butyrals prepared by cross-linking polyvinyl butyral with diethyl- and/or dimethyl oxalate. Method for preparing indicated polyvinyl butyrals involves addition of a cross-linking agent and, if necessary, a plasticizing agent to the parent polyvinyl butyral, homogenization of the mixture and thermal cross-linking at temperature from 80°C to 280°C. Polyvinyl butyrals prepared by such method are components of films useful for manufacturing the triplex. Films made by using such polyvinyl butyrals show the rupture strength value at the level 29 N/mm2 and glasses made of such films show stability against the impact in F- and Sn-directions as 8 and 4, respectively.

EFFECT: improved preparing method, improved and valuable properties of films.

9 cl, 2 dwg, 13 ex

FIELD: polymer materials.

SUBSTANCE: waterproof film is manufactured by heating polyvinyl alcohol-based film to 100-150°C and affecting it by microwave emission for 5-10 min.

EFFECT: enabled modification of film at essentially full absence of by-products.

4 ex

FIELD: sanitary and hygienic facilities.

SUBSTANCE: invention relates to biodegradable film materials for manufacture of such articles as baby swaddling bands, female hygienic products, hospital bed-sheets, and the like. Film subjected to stepped stretching is made from polyester containing disperse phase constituted by inorganic filler. Film is characterized by steam passage above 1000 g/m2/day according to ASTM E96E and air permeability 30 cm3/cm2/min at air pressure 620.52 kN/m2. Film is manufactured by extruding polymer melt mixed with filler through slot extrusion die into cooling zone. Film is impermeable for liquids.

EFFECT: enhanced hygienic properties.

17 cl, 5 dwg, 2 tbl, 10 ex

FIELD: chemical industry; methods of production of the cloth-shaped laminates with a cruciform arrangement of the layers.

SUBSTANCE: the invention is pertaining to chemical industry, in particular to the methods of production of the cloth-shaped laminates with a cruciform arrangement of the layers used for manufacture mainly of bags made out of the such material and having a shape of a pipe, or a folded laminate cloth with a cruciform-shaped arrangement of layers manufactured out of two or more linked to each other oriented films. The film(s)of the laminate representing A-component is (are) placed on one side of the laminate with a cruciform arranged layers and has (have) the main or resulting direction of orientation essentially corresponding to the longitudinal direction of the cloth. The film(s) the laminate, representing B-component is (are) placed on the other side the laminate with a cruciform arrangement of the layers and has (have) the main or resulting direction of orientation essentially perpendicularly to the longitudinal direction of the cloth. The modulus of elasticity of the A- component material being in a non-oriented state is at least by 15 % below the modulus of elasticity of the B-component material being in a non-oriented state. The A- and B-components have different thermal shrinkage along the longitudinal direction of the laminate cloth. At that the thermal shrinkage of A-component is more, than the thermal shrinkage of B-component. The bags made out of the laminate with cruciform-shaped arrangement of the layers have the thermal-welded seams with the heightened strength for delamination at an impact.

EFFECT: the invention ensures, that the film of the laminate representing A-component has a bigger thermal shrinkage, than film of the laminate representing B-component, and the thermal-welded seams of bags have the heightened strength for delamination at an impact.

22 cl, 12 dwg, 2 tbl, 1 ex

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