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Polyethylene resin composition for weathering resistance agriculture film, and preparation method thereof

A technology of resin composition and polyethylene resin, which is applied in the field of agricultural shed film resin composition, can solve the problems of limited weather resistance range of agricultural shed film, short service life of agricultural shed film, and unreasonable aging resistance system, so as to avoid migration And precipitation, improve efficiency, improve the effect of durability

Active Publication Date: 2013-02-13
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned patent is basically to carry out cross-linking modification on a single resin, and the focus is only to improve the melt strength of the resin and improve its processing performance, but the scope for improving the weather resistance of agricultural greenhouse films is limited.
At present, the LDPE and LLDPE base resins used in domestic agricultural shed film production have low weather resistance, resulting in a short service life of agricultural shed film. At the same time, the anti-aging system added is unreasonable, with many types of additives, high production costs, and the use of additives. The persistence is short, prone to problems such as migration and precipitation

Method used

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  • Polyethylene resin composition for weathering resistance agriculture film, and preparation method thereof
  • Polyethylene resin composition for weathering resistance agriculture film, and preparation method thereof
  • Polyethylene resin composition for weathering resistance agriculture film, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Preparation of ULDPE-g-VA graft: According to the weight percentage of ULDPE, mix 6 parts of vinyl acetate (VA) with 100 parts of ULDPE at high speed for 6 minutes, and place the mixed material in a closed container for 10 hours ; Then get 0.02 part of DCP and 0.3 part of acetone and put it into a beaker and mix it, then put the mixed solution and the placed mixed material, 0.15 part of antioxidant 1010, and 0.15 part of calcium stearate together into a 10L high-speed mixer Medium and high speed mixing for 5 minutes; finally, add the mixed material into the Φ67 twin-screw extruder, the reaction temperature (°C) of each section of the screw is: 160, 170, 180, 190, 200, 190, 180, 175, 170 Carry out melt grafting reaction, after reacting for 7 minutes, extrude, cool and granulate to obtain ULDPE-g-VA graft (grafting rate: 2.8%).

[0049] (2) Preparation of ULDPE weather-resistant masterbatch: according to the weight percentage of ULDPE, 100 parts of ULDPE and 5 parts o...

Embodiment 2

[0052] (1) The preparation of the ULDPE-g-VA graft is completely the same as in Example 1.

[0053] (2) The preparation of ULDPE weather-resistant masterbatch is completely identical with embodiment 1.

[0054] (3) Preparation of polyethylene resin composition: after mixing 0.005 part of BPO and 0.12 part of TBHP with 0.3 part of acetone solvent, then add 5 parts of LLDPE (101AA) powder resin, mix in a 10-liter high-speed mixer for 3 minutes, and prepare into a premix masterbatch; take out 13 parts of ULDPE weather-resistant masterbatch a and premix masterbatch, 95 parts of LLDPE (101AA) powder resin, 0.15 parts of antioxidant B561, and 0.2 parts of calcium stearate and add them to Φ67 through the feeding port In the twin-screw extruder, the reaction temperature (°C) of each section of the screw is: 165, 180, 190, 195, 210, 220, 210, 200, 190; after 3 minutes of reaction, extrude, cool, granulate, and prepare Polyethylene resin composition. The composition was blown on a Φ12...

Embodiment 3

[0056] (1) The preparation of the ULDPE-g-VA graft is completely the same as in Example 1.

[0057] (2) The preparation of ULDPE weather-resistant masterbatch is completely identical with embodiment 1.

[0058] (3) Preparation of polyethylene resin composition: after mixing 0.008 part of BPO and 0.17 part of TBHP with 0.4 part of acetone solvent, then add 5 parts of LLDPE (101AA) powder resin, mix in a 10-liter high-speed mixer for 3 minutes, and prepare into a premixed masterbatch; take out 15 parts of ULDPE weather-resistant masterbatch a, premixed masterbatch, 95 parts of LLDPE (101AA) powder resin, 0.2 parts of antioxidant B561, and 0.2 parts of zinc stearate and add them to Φ67 through the feeding port In the twin-screw extruder, the reaction temperature (°C) of each section of the screw is: 165, 180, 190, 195, 210, 220, 210, 200, 190; after 3 minutes of reaction, extrude, cool, granulate, and prepare Polyethylene resin composition. The composition was blown on a Φ120 t...

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Abstract

The present invention provides a linear low density polyethylene (LLDPE) resin composition for a weathering resistance agriculture film and a preparation method thereof. The resin composition comprises, by weight of LLDPE, (1) 100% of LLDPE, (2) 0.05-0.3% of a compound cross-linking aid, and (3) 10-30% of ultra-low density polyethylene (ULDPE) weathering resistance master batch. With the composition, a broad width shed plastic film (a width of more than or equal to 8 m and a thickness of more than or equal to 80 mum) can be blown out without any blending, fisheyes on the surface of the shed plastic film are less, weathering resistance is excellent, and natural damage can not occur after the shed plastic film continuously covers a greenhouse for more than 40 months. The present invention further provides a preparation method for the resin composition, wherein the preparation method has advantages of short procedure, simple process, low development cost, stable product quality and the like.

Description

technical field [0001] The invention relates to a polyethylene resin composition and a preparation method thereof, in particular to an agricultural shed film resin composition with excellent weather resistance using linear low-density polyethylene as the base resin. Background technique [0002] Agricultural plastic film is very important to modern agriculture and is closely related to the national economy and the people's livelihood. It can effectively alleviate the contradiction between agricultural production and development and bring benefits to farmers. At present, my country is one of the countries with the largest production and consumption of agricultural plastic films. Among them, the consumption of polyethylene resin for agricultural shed films exceeds 1.2 million tons, especially in the western region. The annual consumption of polyethylene resin for agricultural shed films has reached 500,000 tons. , Agricultural shed film has become one of the important applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L51/06C08K5/14C08F255/02C08J3/22B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/911B29C48/92B29C2948/92561B29C2948/92704B29C2948/92895
Inventor 徐典宏曹凤霞何连成朱晶白竞冰陈红翟云芳王月霞魏绪玲梁天珍
Owner PETROCHINA CO LTD
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