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Composition for polymer membrane and polymer membrane

A polymer film and composition technology, applied in the field of polymer film compositions and polymer films, can solve problems such as unstable performance, high heat-sealing temperature, and uneven composition of propylene terpolymer, and achieve initial Low heat sealing temperature, good film forming effect

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

[0004] Although propylene polymers have a lower heat-sealing temperature compared to polypropylene, films made from existing propylene polymers still have a higher onset heat-sealing temperature (typically above 115°C)
[0005] In addition, the composition of the propylene terpolymer prepared by the existing gas-phase polymerization method is not uniform enough, the performance is not stable enough, and the film-forming property needs to be further improved.

Method used

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  • Composition for polymer membrane and polymer membrane
  • Composition for polymer membrane and polymer membrane
  • Composition for polymer membrane and polymer membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] This example serves to illustrate the composition for a polymer film and the polymer film according to the present invention.

[0093] (1) Sieve the catalyst solid component (commercially purchased from Beijing Aoda Petrochemical Co., Ltd.), so that the particle size of the obtained solid component is 8-100 microns, and the particle size is a solid within the range of 14-30 microns The amount of the components is 80% by volume. Such as figure 1 As shown, the obtained particle size distribution curve of the solid component is a unimodal distribution.

[0094] The solid component uses magnesium chloride as a carrier, wherein, based on the total amount of the solid component, the content of titanium in terms of elements is 2.5% by weight, and the content of di-n-butyl terephthalate is 10% by weight.

[0095] Continuously feed the catalyst solid component into 50m at 0.63kg / h 3 In the continuous horizontal stirred bed gas-phase reactor, add triethylaluminum continuously ...

Embodiment 2

[0110] This example serves to illustrate the composition for a polymer film and the polymer film according to the present invention.

[0111] (1) The same method as in Example 1 is used to prepare propylene polymer, the difference is that the pressure in the reactor is 2.4MPa, the temperature in the reactor is 60°C, and the hydrogen in the reactor / propylene molar ratio (H 2 / C 3 ) is 0.013.

[0112] The composition and properties of the propylene polymers prepared are shown in Table 1.

[0113] (2) The polymer film was prepared by the same method as in Example 1, except that the propylene polymer was the propylene polymer prepared in step (1) of Example 2.

[0114] The heat-sealing initiation temperature of the prepared polymer films was measured and the results are shown in Table 1.

Embodiment 3

[0116] This example serves to illustrate the composition for a polymer film and the polymer film according to the present invention.

[0117] (1) The same method as in Example 1 is used to prepare propylene polymer, the difference is that the pressure in the reactor is 2.3MPa, the temperature in the reactor is 61°C, and the hydrogen in the reactor / propylene molar ratio (H 2 / C 3 ) is 0.017.

[0118] The composition and properties of the propylene polymers prepared are shown in Table 1.

[0119] (2) The polymer film was prepared by the same method as in Example 1, except that the propylene polymer was the propylene polymer prepared in step (1) of Example 3.

[0120] The heat-sealing initiation temperature of the prepared polymer films was measured and the results are shown in Table 1.

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Abstract

The invention provides a composition for a polymer membrane. The composition contains a propylene polymer and a film forming auxiliary agent; on the basis of the total amount of the propylene polymer, the content of a propylene structure unit is 70 to 96 wt%, the content of an ethene structure unit is 1 to 10 wt%, and the content of an alpha-olefin structure unit is 1 to 20 wt%. The propylene polymer is prepared by using gas phase polymerization; in the process of polymerization, the particle size of a solid component in a utilized catalyst is in a range of 8 to 150 micrometers, and a particle size distribution curve of the solid component is in the form of unimodal distribution. The invention further provides the polymer membrane formed by the composition. The polymer membrane prepared from the composition has a low initial heat-sealing temperature which may be lower than 115 DEG C, normally 105 to 113 DEG C, and the polymer membrane is especially applicable as a heat-sealing layer for a heat-sealing membrane or a multilayer film.

Description

technical field [0001] The present invention relates to a composition for a polymer film and a polymer film. Background technique [0002] Polypropylene film has the characteristics of low relative density, high mechanical strength, good transparency, high gloss, good stiffness, good moisture resistance, excellent heat resistance and easy heat sealing. It is widely used, especially suitable for clothing, food and Packaging of various daily necessities. Therefore, polypropylene film has an important position in the field of plastic product packaging materials. [0003] Since polypropylene is a semi-crystalline polymer, it not only has high hardness, but also has a high melting point. In order to lower the melting point of polypropylene, propylene is usually copolymerized with ethylene and α-olefins other than propylene (such as 1-butene), thereby introducing ethylene structural units and α-olefin structural units into the macromolecular chain of polypropylene , to reduce t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08F210/06C08F210/02C08F210/08C08F2/34
Inventor 华炜马良兴赵丽梅赵唤群谷汉进佟中军陈青葵于建明耿存李卫华李国张丁
Owner CHINA PETROLEUM & CHEM CORP
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