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Super-wide-breadth metallocene polyethylene greenhouse film resin composition and preparation method thereof

A technology of metallocene polyethylene and resin composition is applied in the field of resin composition for making ultra-wide shed film and its preparation field, which can solve the problems of excessive gelation, limited width, and many fish-eyes in the film, so as to improve the performance of the film. Melt strength, melt strength increase, effect of improving processability

Active Publication Date: 2012-04-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned documents are limited in improving the melt strength of the resin and improving its blown film processing performance. They can only blow ultra-thin films and ordinary wide-width shed films, and cannot solve the problem of overheating when the resin melt strength is greatly increased. More gels, resulting in more "fish eyes" in the film, making it impossible to blow and use
There is no relevant report on mLLDPE ultra-wide greenhouse film (width ≥ 14m, thickness ≥ 60μm) with less "fish eyes" in the blown film

Method used

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  • Super-wide-breadth metallocene polyethylene greenhouse film resin composition and preparation method thereof
  • Super-wide-breadth metallocene polyethylene greenhouse film resin composition and preparation method thereof
  • Super-wide-breadth metallocene polyethylene greenhouse film resin composition and preparation method thereof

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Embodiment and

[0043] Embodiment and comparative example:

[0044] The following examples are cited to illustrate the inventive effect of the present invention, but the scope of protection of the present invention is not limited to these examples, and each component in the composition is calculated in parts by weight of the base resin mLLDPE.

Embodiment 1

[0046] Mix 0.33 parts of TB and 0.025 parts of TBPA with 0.8 parts of acetone solvent, then add 5 parts of mLLDPE (HPR18H10AX) powder resin, 0.05 parts of antioxidant 1010, 0.15 parts of calcium stearate, and mix in a 10-liter high-speed mixer After 3 minutes, the premixed masterbatch is made, and the premixed masterbatch and 95 parts of mLLDPE (HPR18H10AX) powder resin are added to the extruder through the feeding port, and the barrel temperature is 155-210 ° C. After reacting for 2 minutes , and then prepare a solution of 0.012 parts of BPO and 0.04 parts of acetone solvent, add it dropwise into the plasticizing section of the extruder, and at a barrel temperature of 200-225 ° C, after extrusion for 17 seconds, cool and granulate to prepare combination. The composition is blown on a Φ120 three-layer composite blown film unit to produce an ultra-wide shed film (14m in width and 60 μm in thickness). The properties of the composition, the film blowing process conditions and the...

Embodiment 2

[0048] Mix 0.29 parts of TB and 0.03 parts of TBPA with 0.7 parts of xylene solvent, then add 5 parts of mLLDPE (ECD350) granular resin, 0.1 part of antioxidant 168, and 0.2 parts of zinc stearate in a 10-liter high-speed mixer After mixing for 3 minutes, make a premixed masterbatch, put the premixed masterbatch and 95 parts of mLLDPE (ECD350) powder resin into the extruder through the feeding port, and react for 2 minutes at the barrel temperature of 155-210°C Finally, prepare a solution of 0.015 parts of BPO and 0.05 parts of xylene solvent, add it dropwise into the plasticizing section of the extruder, and extrude it for 17 seconds at a barrel temperature of 200-225 ° C, then cool and granulate Compositions are prepared. The composition is blown on a Φ120 three-layer composite blown film unit to produce an ultra-wide shed film (14m in width and 60 μm in thickness). The properties of the composition, the film blowing process conditions and the properties of the shed film are...

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Abstract

The invention discloses a metallocene polyethylene greenhouse film resin composition, which comprises the following components based on metallocene linear low-density polyethylene (mLLDPE) being 100% by weight: 1) mLLDPE, wherein the flow rate of mLLDPE melt is 0.5-10 g / 10 minutes; 2) 0.11-0.37% of compound cross-linking agent composed of 1,1-dimethylethyl-hydrogen peroxide and tert-butyl peroxyacetate; and 3) 0.011-0.027% of dibenzoyl peroxide. The strength of the greenhouse film resin composition melt is increased by more than 2 times as compared with that of mLLDPE, and high-strength little-fisheye super-wide-breadth greenhouse film (breadth not less than 14m and thickness not less than 60 mu m) can be prepared by blowing the greenhouse film resin composition without adding any other substances. The invention further discloses a preparation method of the composition.

Description

technical field [0001] The invention relates to a metallocene polyethylene shed film resin composition, in particular to a metallocene linear low-density polyethylene as the base resin, through micro-crosslinking modification to greatly improve its melt strength and blown an ultra-wide shed Resin composition for film and method for its preparation. Background technique [0002] Metallocene linear low-density polyethylene (mLLDPE) has developed rapidly since its first industrial production by Exxon in the 1990s. According to statistics, the current annual output of metallocene linear low density polyethylene in the world is about 15 million tons, accounting for about 15% of the total consumption of linear low density polyethylene, and this proportion is expected to reach about 22% by 2012. This is mainly due to the fact that mLLDPE uses a metallocene catalyst with a single active center, high catalytic activity, outstanding homogeneous catalytic effect, and free design of th...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08K5/14C08J3/24B29C47/92B29B9/06B29C48/92
CPCB29C48/04B29C48/92B29C2948/92561B29C2948/92704B29C2948/92895
Inventor 徐典宏王洪山刘鹏李晶何连成牛承祥伏妍仇国贤梁天珍朱晶
Owner PETROCHINA CO LTD
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