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Over-wide polyethylene greenhouse film resin composition and preparation method thereof

A resin composition, polyethylene technology, applied in the field of polyethylene resin composition, can solve the problems of limited range, inability to blow and use, film fisheye, etc., to prevent gelation, improve melt strength, and improve processability. Effect

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

[0004] 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. The contradiction of multiple gels, with the increase of gels, it is easy to cause more "fish eyes" in the film, making it impossible to blow and use
There is no relevant report on LLDPE ultra-wide greenhouse film (width ≥ 14m, thickness ≥ 80μm) with less "fish eyes" in the blown film

Method used

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  • Over-wide polyethylene greenhouse film resin composition and preparation method thereof
  • Over-wide polyethylene greenhouse film resin composition and preparation method thereof
  • Over-wide polyethylene greenhouse film resin composition and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Mix 0.09 parts of TB and 0.03 parts of DBPH with 0.3 parts of acetone solvent, then add 5 parts of LLDPE (101AA) powder resin, and mix in a 10-liter high-speed mixer for 3 minutes to make a premix masterbatch. Add 95 parts of LLDPE (101AA) powder resin, 0.05 part of antioxidant 1010, and 0.15 part of calcium stearate into the extruder from the feed port, and react for 2 minutes at the barrel temperature of 155-200 ° C, and then Prepare a solution of 0.015 parts of BPO and 0.04 parts of acetone solvent, and add it dropwise into the plasticizing section of the extruder. At a barrel temperature of 200-230 ° C, after extrusion for 17 seconds, cool and granulate to prepare the composition . The composition is blown on a Φ120 three-layer composite blown film unit to produce an ultra-wide shed film (width 14m, thickness 80 μm). The properties of the composition, the film blowing process conditions and the properties of the shed film are shown in Table 1 and Table 2 respectivel...

Embodiment 2

[0050] Mix 0.15 parts of TB and 0.08 parts of DBPH with 0.3 parts of acetone solvent, then add 5 parts of LLDPE (7042) granular resin, and mix in a 10-liter high-speed mixer for 3 minutes to make a premix masterbatch. Add 95 parts of LLDPE (7042) pellet resin, 0.1 part of antioxidant 1010, and 0.1 part of calcium stearate into the extruder from the feed port, and react for 2 minutes at the barrel temperature of 155-200 ° C, and then Prepare a solution of 0.02 parts of BPO and 0.04 parts of acetone solvent, add it dropwise into the plasticizing section of the extruder, and extrude it for 17 seconds at a barrel temperature of 200-230 ° C, then cool and granulate to prepare the composition . The composition is blown on a Φ120 three-layer composite blown film unit to produce an ultra-wide shed film (width 14m, thickness 80 μm). The properties of the composition, the film blowing process conditions and the properties of the shed film are shown in Table 1 and Table 2 respectively. ...

Embodiment 3

[0052] Mix 0.2 parts of TB and 0.1 parts of DBPH with 0.3 parts of acetone solvent, then add 5 parts of LLDPE (101AA) powder resin, and mix in a 10-liter high-speed mixer for 3 minutes to make a premix masterbatch. Add 95 parts of LLDPE (101AA) powder resin, 0.15 parts of antioxidant 1010, and 0.05 parts of calcium stearate into the extruder from the feeding port, and react for 2 minutes at the barrel temperature of 155-200 ° C, and then Prepare a solution of 0.024 parts of BPO and 0.04 parts of acetone solvent, drop it into the plasticizing section of the extruder, and extrude it for 17 seconds at a barrel temperature of 200-230 ° C, then cool it and granulate it to prepare the composition . The composition is blown on a Φ120 three-layer composite blown film unit to produce an ultra-wide shed film (width 14m, thickness 80 μm). The properties of the composition, the film blowing process conditions and the properties of the shed film are shown in Table 1 and Table 2 respectivel...

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Abstract

The invention provides an over-wide polyethylene greenhouse film resin composition and a preparation method thereof. Given the weight of linear low-density polyethylene (LLDPE) is 100wt%, the resin composition comprises the following components: 1, 100% of LLDPE; 2, 0.12-0.45wt% of compounded crosslinking auxiliary; and 3, 0.015-0.032% of dibenzoyl peroxide; in the composition, the compounded crosslinking auxiliary is compounded from 1,1-dimethyl-ethyl-hydrogen peroxide (TB) and 2,5-dimethyl-2,5-di-tert-butyl peroxide hexane (DBPH), and the mass ratio of the two crosslinking auxiliaries is (7:1)-(5:3). The melt strength of the composition is improved by more than twice and can be used for producing an over-wide greenhouse film with thickness not less than 80 mu m and width not less than 14m, and few 'fisheyes' are on the surface of the greenhouse film.

Description

technical field [0001] The invention relates to a polyethylene resin composition, in particular to a resin composition which takes linear low-density polyethylene as a base resin and greatly improves its melt strength through micro-crosslinking modification to blown ultra-wide shed film and its Preparation. Background technique [0002] As we all know, linear low-density polyethylene (LLDPE) is a copolymer of ethylene and α-olefin successfully developed in the 1970s. Its molecules have a linear structure, which makes it have excellent tensile strength, tear strength, puncture resistance and The relatively low price is used by more and more agricultural film manufacturers. my country is the country that uses the largest amount of agricultural plastic film in the world, and the agricultural shed film covers an area of ​​2×10 11 m 2 Among them, the annual consumption of greenhouse film has reached more than 700,000 tons, and agricultural greenhouse film has become one of the...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08K5/14C08J3/24B29B9/06B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704B29C2948/92895
Inventor 徐典宏李锦山刘鹏牛承祥李晶郭毅张宇仇国贤伏妍艾纯金魏绪玲朱晶
Owner PETROCHINA CO LTD
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