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 great

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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Example Embodiment

[0047] Example 1

[0048] After mixing 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 it in a 10-liter high-speed mixer for 3 minutes to make a premixed masterbatch. Add 95 parts of LLDPE (101AA) powder resin, 0.05 part of antioxidant 1010, and 0.15 part of calcium stearate to the extruder through the feeding port, and react for 2 minutes under the condition that the temperature of the barrel is 155 to 200 ℃, and then 0.015 part of BPO and 0.04 part of acetone solvent are prepared into a solution, which is added dropwise into the plasticizing section of the extruder, and the temperature of the barrel is 200-230 ° C, after the extrusion reaction for 17 seconds, cooling, and pelletizing to prepare the composition . The composition is blown on a Φ120 three-layer composite film blowing unit to blow an ultra-wide shed film (width 14m, thickness 80μm), and its composition properties, film blowing pr...

Example Embodiment

[0049] Example 2

[0050] After mixing 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) pellet resin, mix in a 10-liter high-speed mixer for 3 minutes to make a premixed masterbatch, and the premixed 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 through the feeding port, and react for 2 minutes under the condition that the temperature of the barrel is 155 to 200 ° C, and then 0.02 part of BPO and 0.04 part of acetone solvent are prepared into a solution, which is added dropwise into the plasticizing section of the extruder, and the temperature of the barrel is 200-230° C. After extruding for 17 seconds, the composition is cooled and granulated to prepare the composition. . The composition is blown on a Φ120 three-layer composite film blowing unit to blow an ultra-wide shed film (width 14m, thickness 80μm), and its composition pro...

Example Embodiment

[0051] Example 3

[0052] After mixing 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 it in a 10-liter high-speed mixer for 3 minutes to make a premixed masterbatch. Add 95 parts of LLDPE (101AA) powder resin, 0.15 part of antioxidant 1010, and 0.05 part of calcium stearate into the extruder through the feeding port, and react for 2 minutes under the condition that the temperature of the barrel is 155 to 200 ℃, and then 0.024 parts of BPO and 0.04 parts of acetone solvent are prepared into a solution, which is added dropwise into the plasticizing section of the extruder, and the temperature of the barrel is 200-230° C. After extruding for 17 seconds, the composition is cooled and pelletized to prepare the composition. . The composition is blown on a Φ120 three-layer composite film blowing unit to blow an ultra-wide shed film (width 14m, thickness 80μm), and its composition properties, film blowi...

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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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