Composition for polymer film and polymer film and multilayer film

A polymer film and composition technology, applied in the direction of synthetic resin layered products, layered products, chemical instruments and methods, etc., can solve the problems of mutual adhesion, high initial heat sealing temperature of the film, and adverse effects of the processing process, etc. Achieve good film-forming properties, low initial heat-sealing temperature, and good heat-blocking resistance

Active Publication Date: 2013-05-08
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the heat-sealing temperature of propylene polymer is lower than that of polypropylene, the initial heat-sealing temperature of films prepared from existing propylene polymers is still high (usually above 115°C), and it is easy to seal at high temperatures.

Method used

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  • Composition for polymer film and polymer film and multilayer film
  • Composition for polymer film and polymer film and multilayer film
  • Composition for polymer film and polymer film and multilayer film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] This example serves to illustrate compositions for polymer films and polymer films and multilayer films according to the invention.

[0108] (1) Preparation of propylene polymer

[0109] Adopt commercially available catalyst solid components from Beijing Aoda Petrochemical Co., Ltd., and sieve the catalyst solid components before use, so that the particle size of the catalyst solid components is 10-50 microns, and the particle size is 14-30 The amount of solid components within the range of microns is 87% by volume; as figure 1 As shown, the particle size distribution curve of the collected solid components is a unimodal distribution.

[0110] Based on the total amount of the solid components, the content of titanium in the solid components is 2.5% by weight, and the content of di-n-butyl terephthalate is 9% by weight.

[0111] Continuously feed the catalyst solid component at 0.61g / h for 50m 3 In the continuous horizontal stirred bed gas-phase reactor, add triethyla...

Embodiment 2

[0123] This example serves to illustrate compositions for polymer films and polymer films and multilayer films according to the invention.

[0124] The same method as in Example 1 was used to prepare propylene polymer and polymer film, except that in step (1), the amount of solid components with a particle size in the range of 14-30 μm was 90% by volume.

[0125] During the polymerization process, there was no phenomenon that the polymer particles blocked the material discharge pipe of the reactor. The composition and properties of the propylene polymers prepared are shown in Table 1. The onset heat-sealing temperature and thermal blocking resistance of the prepared polymer films are shown in Table 1.

Embodiment 3

[0127] This example serves to illustrate compositions for polymer films and polymer films and multilayer films according to the invention.

[0128] The same method as in Example 1 was used to prepare a propylene polymer, except that in step (1), the amount of solid components with a particle size in the range of 14-30 microns was 100% by volume.

[0129] During the polymerization process, there was no phenomenon that the polymer particles blocked the material discharge pipe of the reactor. The composition and properties of the propylene polymers prepared are shown in Table 1. The onset heat-sealing temperature and thermal blocking resistance of the prepared polymer films are shown in Table 1.

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Abstract

The invention provides a composition for a polymer film, a polymer film and a multilayer film; the composition comprises propylene polymer and a film forming additive; on a basis of the total amount of the propylene polymer, the content of the propylene structure unit is 80-95 wt%; the content of the ethylene structure unit is 1-10 wt%; the content of the alpha-olefin structure unit is 1-19 wt%; the propylene polymer comprises 1-20 wt% of xylene soluble substances, and 80-99 wt% of xylene insoluble substances; the crystallization temperature of the xylene soluble substance is 40-65 DEG C, and the melting temperature is 80-97 DEG C; the crystallization temperature of the xylene insoluble substance is 85-105 DEG C, and the melting temperature is 125-135 DEG C. The composition of the invention has good film forming capability, and the polymer film formed by the composition has a low initial heat-sealing temperature and good thermal adhesion resistance. The polymer film of the invention is suitable for being used as a heat-sealing layer for a heat shrinkable film or a multilayer film.

Description

technical field [0001] The present invention relates to a composition for a polymer film, the present invention also relates to a polymer film formed from the composition, and the present invention further relates to a multilayer film comprising the polymer film. Background technique [0002] Heat-shrinkable film is a thermoplastic film that is stretched and oriented during production and shrunk by heat during use. Heat shrinkable film is widely used in food, books and packaging. While preventing product damage and dirt, it can also fully display the appearance of the packaged object. At present, polyolefins (such as polyethylene and polypropylene) are usually used to prepare heat-shrinkable films. Propylene terpolymer formed by copolymerization of propylene, ethylene and α-olefins other than propylene, due to the introduction of structural units derived from ethylene and α-olefins other than propylene into the macromolecular chain of the propylene homopolymer The structur...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08F210/16C08F2/34C08F4/646B32B27/32
Inventor 华炜马良兴赵丽梅成卫戍谷汉进袁春海陈青葵田正昕耿存赵春红张启明杨连永
Owner CHINA PETROLEUM & CHEM CORP
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