Metallocene polyethylene greenhouse film resin composition

A technology of metallocene polyethylene and resin composition, applied in the field of polyethylene resin composition for greenhouse film, can solve the problems such as the inability to guarantee the excellent physical properties of mLLDPE, the inability to guarantee the stability of the quality of the film product, and the complexity of the metallocene polyethylene method. , to achieve the effect of significant resin reinforcement, increase cost and improve processability

Active Publication Date: 2011-08-31
PETROCHINA CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] The above-mentioned documents basically use the method of blending mLLDPE with LDPE and LLDPE to improve its processability. In this way, it is impossible to ensure that the excellent physical properties of mLLDPE can be brought into play in film products, and because of the uncertainty of the ble

Method used

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  • Metallocene polyethylene greenhouse film resin composition
  • Metallocene polyethylene greenhouse film resin composition
  • Metallocene polyethylene greenhouse film resin composition

Examples

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[0044] Examples:

[0045] The preparation method of the metallocene polyethylene shed film resin composition: taking the base resin mLLDPE as 100 parts by weight, and adding the number of other additives as parts by weight.

[0046] 1) Specific raw material formula and preparation process. See Table 1 and Table 2.

[0047] Table 1 Ingredients formula

[0048]

[0049] Table 2 Preparation process of twin screw extruder

[0050]

[0051]

[0052] 2) Blowing and performance of greenhouse film. See table 3

[0053] Table 3 Process conditions of resin composition blown greenhouse film*

[0054]

[0055]

[0056] *Φ120 three-layer composite film blowing unit provided by Dalian Rubber Machinery Factory

[0057] 3) Test results of the performance of the greenhouse film resin composition and the application performance of the greenhouse film. See Table 4 and Table 5.

[0058] Table 4 Physical properties of resin composition

[0059]

[0060]

[0061] *Melt flow ratio: It is the ratio of the melt f...

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Abstract

The invention relates to a metallocene polyethylene greenhouse film resin composition, by taking the weight of metallocene linear low-density polyethylene as 100%, the metallocene polyethylene greenhouse film resin composition comprises 100% of (1) the metallocene linear low-density polyethylene (mLLDPE), 0.05-0.35% by weight of (2) di-tert-butyl hydrogen peroxide and 0.005-0.041% by weight of (3) tert-butyl peroxybenzoate, wherein the mLLDPE adopts polyethylene prepared by adopting a metallocene catalytic system, the polyethylene is obtained by homopolymerization of ethylene or by copolymerization of ethylene and butylene-1 or hexylene-1, the greenhouse film resin composition can produce a greenhouse film with the breadth of more tahn 8m in a blowing way on an ordinary three-layer compound film blowing machine unit without any equipment transformation, and the film has high tensile strength and tear strength and excellent light transmission. The invention further provides a preparation method of the resin composition.

Description

technical field [0001] The invention relates to a polyethylene resin composition for a greenhouse film, in particular to a resin composition for stably blowing a wide-width three-layer composite greenhouse film by micro-crosslinking and modifying metallocene polyethylene to improve its melt strength substances and their preparation methods. Background technique [0002] Since the end of the 1950s, agricultural shed film was first used successfully in rice seedling raising in Guangdong. Since then, my country's agricultural greenhouse film has spread rapidly in China. According to incomplete statistics, at present, my country has nearly a thousand agricultural film production enterprises of various sizes and sizes, with a production capacity of more than 1 million tons and an actual annual output of more than 1.2 million tons. my country has become the largest producer and consumer of agricultural film. countries, their consumption is about 1.6 times that of all other countr...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08K5/14B29C47/92A01G9/22B29C48/92
CPCY02A40/25
Inventor 徐典宏刘鹏刘敏邵月君张宇牛承祥梁滔白竞冰董万卓魏绪玲
Owner PETROCHINA CO LTD
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