Polyolefin polymer composition, the mixture used to it, protivorededivne agent and polyolefin film based on it

 

(57) Abstract:

The invention relates to polyolefin polymer compositions, intended for the production of transparent films having satisfactory anti-adhesion ability. Protivorededivne mixture consists of a first component selected from talcs and a second component selected from feldspars and nepheline syenites, with low abrasion. The introduction of the polyolefin composition protivoallergennogo agent containing this mixture, provides anti-adhesion effect, much more than proteoliposome action of any component separately. When used in polyolefin film protivorededivne mixture provides good optical properties. 4 S. and 2 C.p. f-crystals, 3 tables.

The invention relates to polyolefin polymer compositions, the original materials used in them and made of them the film.

More specifically, the invention relates to the use of a combination of talc and feldspar, nepheline and/or nepheline syenite.

The invention relates to polyolefin polymer compositions that are intended to obtain transparent is its adhesion, has low abrasivity. These tapes are widely used for plastic and shell.

Polyolefin films are widely used for packaging all over the world and are gradually replacing traditional materials such as paper. Highly transparent polyolefin films allows you to easily see and identify the contents of the package. However, upon receipt of the polymer film is used for bonding two or more of the contacting layers of film or "sticking", making difficult the separation film, opening the bag and finding the end of the roll.

To reduce adhesion to the introduction of inorganic mineral filler in polyolefin film. It is well known that films prepared from the polymer containing anti-adhesion fillers, have a rough surface, which reduces the pressure contact between the film layers and reduces adhesion, hence such fillers we use the term "anti-adhesion agents".

Not all inorganic fillers are effective anti-adhesion agents, and some of them have other disadvantages such as high cost, high abrasion, a negative influence on the optical characteristics, the damage is about the number of anti-adhesion agent to reduce adhesion to the desired level while minimizing negative effects on the optical properties and other characteristics, such as wear of processing equipment.

Diatomaceous earth is commonly used as a moderately effective anti-adhesion agent, but has the following negative characteristics: gives the film turbidity, poor transparency, very high abrasion and is moderately expensive. Talc is also used extensively in some polyolefin formulations as a moderately effective anti-adhesion agent. Its advantages in comparison with diatomaceous earth are lower cost, excellent transparency film and very low abrasion. However, this film is muddy and is not suitable for highly transparent packaging applications. Although nepheline syenite or feldspar are considered as anti-adhesion agents for highly transparent film applications (as their index of optical refraction is closer to the index of optical refraction polyethylene), they are relatively ineffective in reducing the strength of adhesion and have a very high abrasiveness.

Abrasive inorganic anti-adhesive agents is of interest for several reasons. High is amityvale equipment. When the wear reaches the point where it changes the size of the equipment in critical areas, can deteriorate as the dispersion of additives in the polymer, and performance. In such cases, it may suffer the quality of the product and may increase the cost of production, especially if the equipment must be decommissioned, and new parts to be purchased to replace worn parts. In addition, abrasion of the equipment will be entered in the polymer product metal contamination that may adversely affect the stability and color of the product, or both. For these reasons, preferred are anti-adhesion agents with low abrasiveness.

There are many attempts to solve the problem of balancing and anti-adhesion motornih properties of the polyolefin film, but none of them are aimed at further increasing transparency and lowering proteoliposomes abrasiveness of the film and the cost (which are all necessary indicators for competitive industrial product). Still not been found cost-effective caking recipe for highly transparent polyolefin of planetesi first component, selected from talcs and a second component selected from feldspars, nepheline treatment and nepheline syenites, in which the ratio of the first component to the second component provides the amount of abrasiveness, significantly less than expected by the rule of mixtures. The invention also relates to anti-adhesion agent containing a mixture of a first component selected from talcs and a second component selected from feldspars, nepheline treatment and nepheline syenite in which the ratio of the first component to the second component provides anti-adhesion effect, significantly greater than the effect of any anti-adhesion component separately. When used in polyolefin film this substance does not result in a significant loss of optical properties.

This invention also relates to the mixture of the first component selected from talcs and a second component selected from feldspars, nepheline treatment and nepheline syenites, in which the ratio of the first component to the second component provides the amount of abrasiveness, significantly less than expected by the rule of mixtures, and in which the ratio of the first component to the second component provides CLASS="ptx2">

This invention also relates to a polyolefin resin composition in which the ratio of the first component to the second component additionally provides proteoliposome action, much more than protivorededivne action of any component in isolation, and characterization of the abrasiveness of the first and second component in the mixture is about 80% or less of the characteristics of abrasiveness, which was expected by the rule of mixtures.

Also this invention relates to a polyolefin film containing a polyolefin polymer composition, and such a film can be made of the above components, with the amount of abrasiveness, significantly lower values abrasiveness, which was expected by the rule of mixtures, and the film may have protivorededivne action, much more than when running with any component separately.

The advantage of the present invention is that the mixture and polyolefin polymer compositions can be used to produce films that have satisfactory anti-adhesion and optical characteristics (turbidity and transparency). The initial mixture may also have a low abrasive is high, than separately, while maintaining the optical properties and low abrasiveness.

In published Japanese application Matsumoto et al., "Method for the Production of Antifog face Film" Japanese Kokai 60(1985)-49047 describes how to use polyolefin resin composition containing a polyolefin resin, two types of fine inorganic filler, amide, unsaturated fatty acids and mixed polyolefin fatty acids.

In U.S. patent 5346944 "face Resin Composition" (Hayashida et al.) described polyolefin polymer composition comprising protivorededivne agent and, possibly, an antistatic agent, additive versus turbidity and antioxidants.

One variant of the present invention is a mixture of a first component selected from talcs and a second component selected from feldspars, nepheline treatment and nepheline syenites, in which the ratio of the first component to the second component provides the amount of abrasiveness, significantly less than the amount of abrasiveness, expected by the rule of mixtures.

Preferably, the amount of abrasiveness is about 80% or less of the value abrasiveness, expected by the rule of mixtures, more preferably about 50% or less of the value is, used in polyolefin polymer compositions, films and other kinds of products, such as sheets, extruded, injection molded articles made from such polyolefin polymer compositions. Polyolefins that are considered suitable for the present invention can be any polyolefin, which may be transparent, crystalline and capable of forming naprawiamy film. Non-limiting examples include crystalline homopolymers of olefin with the number of carbon atoms from 2 to 12, or a mixture of two or more crystalline copolymers or copolymers of ethylene and vinyl acetate with other polymers. Also, the polyolefin polymer may be a high density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymers, poly-1-butylene, copolymers of ethylene and vinyl acetate, etc., and polyethylene is low and medium density. Additional examples are statistical or block copolymers of polyethylene, polypropylene, poly-4-methylpentene-1 and copolymers of ethylene and propylene and ethylenepropylene. Among them particularly suitable are copolymers of ethylene and propylene and copolymers containing 1 or 2 kgs is maleinovogo polymer, used in the present invention is not limited. For example, it can be obtained by ionic polymerization or radical polymerization. Examples of polyolefin polymers obtained by ion polymerization, include homopolymers, such as polyethylene, polypropylene, polybutylene-1 and poly-4-methylpentene, and copolymers of ethylene, obtained by copolymerization of ethylene and-olefin, and as-olefins are olefins having from 3 to 18 carbon atoms, such as propylene, butene-1, 4-methylpentene-1, hexene-1, octene-1, mission-1 and octadecene-1. These olefins can be used individually or two or more types. Other examples include copolymers of propylene, such as copolymers of propylene and butene-1. Examples of polyolefin polymers obtained by radical polymerization include a homopolymer of ethylene or copolymers of ethylene, obtained by copolymerization of ethylene and radiolopolis monomers. Examples radiolopolis monomers include unsaturated carboxylic acids are esters of acrylic, methacrylic and maleic acids, anhydrides of these acids and complex vinyl esters such as vinyl acetate. Specific examples of complex emirs not amerisuite monomers can be used individually or two or more types.

Talc in the present invention is selected from talc, used for the produced polyolefin materials. Conventional talc has a monoclinic crystal lattice, the proportion of from about 2.6 to 2.8 and the empirical formula of Mg3Si4O10(OH)2.

Preferably, the average particle size used talc is from about 0.1 microns to about 10 microns.

The second component selected from feldspars, nepheline treatment and nepheline syenite or mixtures thereof. Such materials are known in the art and are adequately described in the publication "Minerals and Rocks", The New Encyclopedic, vol.24, pp. 151-157, 175-179, Encyclopedia Britannica, Inc. (Chicago, 1986), given here by reference in its entirety.

Preferably, the average particle size used by the second component ranges from about 0.1 μm to about 10 μm.

The mixture obtained any suitable mixing operation, which does not adversely impact in terms of reducing and agglomerization component. Such confusion can be combined, but not necessarily, with the possible grinding components.

The amount of abrasiveness can be determined using the apparatus for testing abrasion Anl is the number of links here is a guide Device for testing the abrasion Alligner AT 1000".

Another option of the present invention is protivorededivne agent containing a mixture of a first component selected from talcs and a second component selected from feldspars, nepheline treatment and nepheline syenites, in which the ratio of the first component to the second component provides proteoliposome action, much more proteoliposome action of any component separately.

In a preferred embodiment, the ratio of the two components is from about 1: 3 to about 3:1, i.e., from about 25 to 75% talc content up to 100% of the second component. More preferably, the ratio is from about 45:55 to about 75:15.

Preferably, protivorededivne action provides the degree of clumping of approximately 85% or less compared to any component separately, more preferably, the degree of adhesion is approximately 75% or less compared to any component individually, and even more preferably, the degree of clumping is about 50% or less compared to any component separately.

Protivorededivne agent can be used to obtain a polyolefin film; in this case, preference is x as transparency and turbidity.

Another variant of the invention is a mixture of a first component selected from talcs and a second component selected from feldspars, nepheline treatment and nepheline syenites, in which the ratio of the first component to the second component provides the amount of abrasiveness, significantly less than the amount of abrasiveness, expected by the rule of mixtures, and in which the ratio of the first component to the second component provides protivorededivne action, much more than any individual component.

Preferably, the ratio of the first and second component ranges from about 1: 3 to 3:1, and the characteristic of the abrasiveness of the first and second component in the mixture is about 50% or less of the characteristics of abrasiveness, which is expected by the rule of mixtures, and protivorededivne substance provides a degree of clumping about 50% or less.

The mixture of the first and second component can be obtained as the initial mixture introduced into the polyolefin polymer composition, or be kept in place the introduction of the polyolefin polymer composition, or as part of obtaining polyolefin film. The order of introduction of separate components is not ODA is but or in a separate masterbatches with subsequent mixing together.

Another option of the invention is a polyolefin polymer composition having a mixture of a first component selected from talcs and a second component selected from feldspars, nepheline treatment and nepheline syenites, in which the ratio of the first component to the second component provides the amount of abrasiveness, significantly lower values abrasiveness, which is expected by the rule of mixtures.

Another option is a polyolefin film containing a polyolefin polymer composition having a first component to a second component, which provides the amount of abrasiveness, significantly lower values abrasiveness, which is expected by the rule of mixtures, and, in addition, provides protivorededivne action, much more than any individual component.

Preferably, the polyolefin polymer composition is a mixture of the first and second component, in which the ratio of the first component to the second component ranges from about 1:3 to 3:1, and the value of the abrasiveness of the first and second component in the mixture is about 80% or less with what combinatii provide the degree of clumping about 50% or less.

Another variant of the invention is a polyolefin film containing a first component selected from talcs and a second component selected from feldspars, nepheline treatment and nepheline syenites, in which the ratio of the first component to the second component provides the amount of abrasiveness, significantly less than the amount of abrasiveness, expected by the rule of mixtures.

Preferred is a polyolefin film containing a first component selected from talcs and a second component selected from feldspars, nepheline treatment and nepheline syenites, in which the ratio of the first component to the second component provides the amount of abrasiveness, significantly less than the amount of abrasiveness, expected by the rule of mixtures, and in which the ratio of the first component to the second component provides protivorededivne action, much more than any individual component.

The present invention is described in the following illustrative examples which are not intended to limit the scope of the invention.

Example 1

Laboratory measurements of the abrasiveness of anti-adhesion agents was carried out using the device to test the ground as control tests. The test samples were samples of talc And (Politely AG609), talc (Polyblock), nepheline syenite (MINEX 7) and diatomaceous earth (Super Floss).

The samples and the mixtures were described as follows:

Experience 1 - 50/50* mixture of talc and nepheline syenite.

Experience 2 - 50/50 mixture of talc and nepheline syenite.

Experience 3 - 75/25 mixture of talc and nepheline syenite.

Experience 4 - 25/75 mixture of talc and nepheline syenite.

Experience 5 - 100% talc A.

Experience 6 - 100% nepheline syenite.

Experience 7 - 100% diatomaceous earth.

* "50/50" means 50 wt.% in relation to 50 wt.%.

All samples were tested on the device for testing the abrasion Alligner model al-1000 in the form of suspensions with 10% content of dry mineral. Wear body was bronze wire mesh. The duration of the trials was 100 rpm and/or 174,000 sq of abrasion cycles. The test results have been weight loss wire, expressed in milligrams (mg). The results are shown in table 1.

Example 2

In this experiment, the minerals talc and nepheline syenite, separately and in combination, in parallel with diatomaceous earth as a control option, and the total loading of 50% with obtaining protivogaznyh bases. The ratio of talc to nepheline syenite ranges from 0: 100 to 100:0. Then protivorededivne basis diluted (mixed) LDPE and erucamide Supplement for slippage and processed by extrusion blown film with a thickness of 1 mm using a line for the films by extrusion with blowing on the basis of single screw extruder to obtain the final film formulations with a content of 2000 million-1total mineral protivoallergennogo agent and 750 million-1erucamide supplements for slippage. The resulting films were then tested on protivorededivne and optical properties (turbidity and transparency) using the following methods.

Testing methods.

(1) the Degree of adhesion

To determine the degree of adhesion method is used parallel plates according to ASTM D3354-74. Upon receipt of sample pieces of film 203,2203,2 mm cut from a pipe with flat walls. Double film layer is separated, is passed slowly through a grounding rod to remove static charges and then is folded so that the inner surface of the initial film sleeve are in contact with each other. All films are kept under the maximum load of 6.9 kPa in tsya force, required for the separation of these two layers, expressed in grams.

(2) Turbidity

This test is performed in accordance with ASTM D1003. Turbidity is the percentage of transmitted light which in passing through the sample film is dispersed. The lower the number, the turbidity, the better the optical characteristic of the light transmission film.

(3) Transparency

For this test instrument is used to determine the transparency of Zebedee CL-100 and method of the manufacturer of the device. Optical transparency is defined as the degree of distinctness of detail with which the object can be seen through the film. The higher the number of transparency, the better the resolution of the film.

Separate protivogaznymi minerals used for these samples are: talc And (Politely AG609), talc (Polyblock), nepheline syenite (MINEX 7) and diatomaceous earth (Super Floss). The results of determining the degree of clumping, turbidity and transparency for the samples of example 2 are given in table 2.

Example 3

In this additional experiment, anti-adhesive bases described in example 2, diluted and recycled LDPE film with a thickness of 1 mm using a line receiving pea with 5500 hours per million total protivoallergennogo minerals. The resulting films were then tested to determine the degree of adhesion and optical characteristics (turbidity and transparency) using the test methods described in example 2. The results of determining the degree of adhesion, turbidity and transparency for the samples of example 3 are given in table 3.

1. Protivorededivne mixture consisting of a first component selected from talcs and a second component selected from feldspars and nepheline syenites, in which the ratio of the first and second components is from about 1:3 to about 3:1, namely, from about 24 to 75% of the talc and the second component up to 100%, and the particle size of the talc and the second component is in the range of 0.1 to 10.0 μm.

2. The mixture under item 1, characterized in that the ratio of 45:55 to 3: 1.

3. The mixture under item 1 or 2, characterized in that the second component selected from feldspars.

4. Protivorededivne agent, characterized in that it is made of protivoatomnoi mixture according to any one of paragraphs.1-3.

5. Polyolefin polymer composition comprising a polyolefin resin and protivorededivne agent, characterized in that protivorededivne agent is agent p. 4 of 2000 - 5000 million

 

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