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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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  • Application Information

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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 blending grade Unable to guarantee the stability of film product quality
In addition, the method of improving the processing performance of metallocene polyethylene by improving the polymerization process and processing equipment is complicated, technically difficult, high in cost, and narrow in application

Method used

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

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Embodiment

[0045] The preparation method of the metallocene polyethylene greenhouse film resin composition: the base resin mLLDPE is used as 100 parts by weight, and the parts added by other additives are used as parts by weight.

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

[0047] Table 1 raw material formula

[0048]

[0049] Table 2 Twin-screw extruder preparation process

[0050]

[0051]

[0052] 2) The blowing and performance of the shed film. see table 3

[0053] Table 3 Resin Composition Blowing Process Conditions for Shed Film*

[0054]

[0055]

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

[0057] 3) The 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] The physical property of table 4 resin composition

[0059]

[0060]

[0061...

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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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