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Metallocene polyethylene greenhouse film resin composition with high intensity and ultra-broad width, and its preparation method

A technology of metallocene polyethylene and resin composition, applied in the field of ultra-wide shed film resin composition and preparation thereof, can solve the problems of high tear strength, limited amplitude and the like, achieve improved melt strength, improved cost and effect significant 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

[0005] The above-mentioned documents are limited in improving the melt strength of mLLDPE resin and improving its blown film processing performance, and can only blow ultra-thin films and ordinary wide-width shed films. However, the melt strength of mLLDPE resin is greatly improved, and by adding a second The component PP / mLLDPE is blended with grafts to prepare ultra-wide greenhouse films with high tear strength, less "fish eyes", which can be laid under the harsh conditions of frequent sandstorms in western China and are not prone to bursting. Width ≥ 14m, thickness ≥ 60μm) There is no relevant report

Method used

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  • Metallocene polyethylene greenhouse film resin composition with high intensity and ultra-broad width, and its preparation method
  • Metallocene polyethylene greenhouse film resin composition with high intensity and ultra-broad width, and its preparation method
  • Metallocene polyethylene greenhouse film resin composition with high intensity and ultra-broad width, and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Preparation of PP / mLLDPE blended graft a: Take 0.04 parts of DCP and 0.15 parts of acetone and mix them in a beaker, then mix the mixed solution with 80 parts of PP (F401) and 20 parts of mLLDPE (HPR18H10AX) , 4 parts of methacrylic acid mixed together at high speed for 5 minutes, then put the mixed material into a twin-screw extruder for melt grafting reaction, the reaction temperature is 170-220 ° C, the reaction time is 7 minutes, extrusion, cooling, granulation, The PP / mLLDPE blended graft a was obtained.

[0055] (2) Preparation of mLLDPE greenhouse film resin composition: After mixing 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) and 0.15 parts of antioxidant 1010, 0.15 parts of calcium stearate , After mixing in a 10-liter high-speed mixer for 3 minutes, a premixed masterbatch was made. Take out 13 parts of PP / mLLDPE blended graft a, premixed masterbatch and 95 parts of mLLDPE (HPR18H10AX)...

Embodiment 2

[0057] (1) Preparation of PP / mLLDPE blended graft b: Take 0.07 parts of DCP and 0.2 parts of acetone and mix them in a beaker, then mix the mixed solution with 70 parts of PP (F401) and 30 parts of mLLDPE (ECD350) , 7 parts of methacrylic acid mixed together at high speed for 5 minutes, then put the mixed material into a twin-screw extruder for melt grafting reaction, the reaction temperature is 170-220 ° C, the reaction time is 7 minutes, extrusion, cooling, granulation, The PP / mLLDPE blended graft b was obtained.

[0058] (2) Preparation of mLLDPE greenhouse film resin composition: After mixing 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) and 0.2 parts of antioxidant 1010, 0.2 parts of stearic acid Zinc, mixed in a 10-liter high-speed mixer for 3 minutes, was made into a premixed masterbatch. Take out 17 parts of PP / mLLDPE blended graft b, premixed masterbatch and 95 parts of mLLDPE (ECD350) and add them to th...

Embodiment 3

[0060] (1) Preparation of PP / mLLDPE blended graft c: Take 0.06 parts of BPDH and 0.22 parts of acetone and mix them in a beaker, then mix the mixed solution with 75 parts of PP (F401), 25 parts of mLLDPE (HPR18H10AX ), 6 parts of butyl methacrylate were mixed at high speed for 5 minutes, and then the mixed material was added to a twin-screw extruder for melt grafting reaction. The reaction temperature was 170-220 ° C, and the reaction time was 7 minutes. Extrusion, cooling, Granulate to obtain PP / mLLDPE blended graft c.

[0061] (2) Preparation of mLLDPE greenhouse film resin composition: After mixing 0.26 parts of TB and 0.08 parts of TBPA with 0.9 parts of acetone solvent, then add 8 parts of mLLDPE (HPR18H10AX) and 0.2 parts of antioxidant 1010, 0.2 parts of zinc stearate , After mixing in a 10-liter high-speed mixer for 3 minutes, a premixed masterbatch was made. Take out 20 parts of PP / mLLDPE blended graft c, premixed masterbatch and 92 parts of mLLDPE (HPR18H10AX) and a...

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Abstract

The invention discloses a metallocene polyethylene greenhouse film resin composition with high intensity and ultra-broad width and its preparation method, by referring linear low density metallocene polyethylene in weight percent, the resin composition comprises: 1) 100% of mLLDPE; 2) 0.11%-0.37% of compound crosslinking auxiliary agent (1,1-hydroxyphenyl-hydrogen peroxide and tert-butyl acetate peroxide); 3) 0.011%-0.027% of dibenzoyl peroxide; 4) 11%-29% of PP / LLDPE blended grafted polymer. According to the invention, the composition is capable of steadily blowing the ultra-broad width greenhouse film (broad width is greater than or equal to 14m, the thickness is greater than or equal to 60 mum) on a general film blowing machine group, and the tear strength of film product is high, the product has no fish eye on the appearance, the polyethylene greenhouse film resin composition is capable of resisting 8-9 grade sand storm, and is especially suitable for laying in central and westernregions in which the sandstorm occurs frequently. The present invention also discloses a preparation method of the resin composition.

Description

technical field [0001] The invention relates to a metallocene polyethylene shed film resin composition, in particular to modifying metallocene linear low-density polyethylene (mLLDPE) by micro-crosslinking with organic peroxides and adding the second component PP / mLLDPE for blending and grafting The object is blown into a high-strength, anti-wind and sand ultra-wide greenhouse film resin composition and a preparation method thereof. Background technique [0002] my country is a large agricultural country and one of the countries that use the most agricultural plastic films in the world. Among them, the annual consumption of greenhouse films has reached more than 700,000 tons. Agricultural greenhouse films occupy a pivotal position in my country's plastic industry. In recent years, with the development of greenhouse cultivation technology, the requirements for the function of greenhouse film are getting higher and higher. It is no longer a simple vegetable planting, but has b...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L51/06C08K5/14C08J3/24B29B9/06B29C47/92B29C48/92
CPCB29C48/92B29C2948/92561B29C2948/92704B29C2948/92895B29C2948/9298
Inventor 徐典宏刘鹏仇国贤牛承祥刘敏郭义孙卫国高阳光董万卓梁天珍李耀
Owner PETROCHINA CO LTD
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