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Blended material of ethylene-vinyl alcohol copolymer and high-density polyethylene and method for preparing same

A high-density polyethylene and vinyl alcohol copolymer technology, which is applied in the field of ethylene-vinyl alcohol copolymer and high-density polyethylene blend materials and its preparation, can solve the problems of poor barrier properties of blends, low EVOH content, impact Low strength and other problems, to achieve the effect of high impact strength at room temperature and low temperature, good toughness, and cost reduction

Inactive Publication Date: 2010-06-16
GUANGZHOU LUSHAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low impact strength and poor toughness of PP at low temperature, the application of the blend at low temperature is limited.
Chinese patent CN101323685A discloses a blend film of EVOH and LLDPE and its preparation method. Due to the addition of a certain amount of calcium carbonate masterbatch and the low content of EVOH in the blend, the barrier properties of the blend are not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The components of the blended material are calculated by weight percentage: EVOH 50%, HDPE 25%, metallocene polyolefin elastomer is American Dow ENGAGE8200 10%, maleic anhydride grafted metallocene polyolefin produced by Guangzhou Lushan New Materials Co., Ltd. Elastomer AR-114.8%, antioxidant tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester 0.2%. Add the above-mentioned components except the antioxidant to a high-speed mixer and mix for 5 minutes, then add the antioxidant and mix evenly, then add them to a twin-screw extruder, extrude, granulate and dry to obtain the present invention of the blend. Among them, the diameter of the twin-screw extruder is 35mm, the length-to-diameter ratio is 40, and the temperature settings are: 150°C, 180°C, 190°C, 200°C, 205°C for the first zone to five zones, and the die head temperature is 200°C. The extruder speed was 350 rpm.

Embodiment 2

[0036] The components of the blended material are calculated by weight percentage: EVOH 75%, HDPE 10%, EVA 10%, maleic anhydride grafted metallocene polyolefin elastomer AR-14.8% produced by Guangzhou Lushan New Materials Co., Ltd., 2,6 - Di-tert-butyl-4-methylphenol 0.2%. The preparation method of the blended material is the same as in Example 1.

Embodiment 3

[0038] The components of the blended material are calculated by weight percentage: EVOH 80.1%, HDPE 10%, metallocene polyolefin elastomer DF7405% of Mitsui Corporation of Japan, maleic anhydride grafted polyethylene HR-14.8 produced by Guangzhou Lushan New Materials Co., Ltd. %, 2,6-di-tert-butyl-4-methylphenol 0.1%. The preparation method of the blended material is the same as in Example 1.

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Abstract

The invention belongs to the technical field of blending processing of copolymers and discloses a blended material of an ethylene-vinyl alcohol copolymer and high-density polyethylene. The blended material comprises the following components in percentage by weight: 50.0 to 80.1 percent of ethylene-vinyl alcohol copolymers, 10.0 to 30.0 percent of high-density polyethylene, 5.0 to 15.0 percent of flexibilizer, 4.8 to 15 percent of compatilizer, and 0.1 to 1.0 percent of antioxidant. The invention also discloses a method for preparing the blended material. The blended material has high gas resisting property of EVOH as well as high moisture resisting property of HDPE; the product cost is effectively lowered; the EVOH / HDPE blended material is good in toughness, the normal-temperature and the low-temperature impact strengths of the EVOH / HDPE blended material are obviously higher than those of the EVOH, and the application range of EVOH is widened.

Description

technical field [0001] The invention belongs to the technical field of polymer blending processing, and in particular relates to a blend material of ethylene-vinyl alcohol copolymer and high-density polyethylene and a preparation method thereof. Background technique [0002] Ethylene-vinyl alcohol copolymer (EVOH) is a crystalline polymer with a chain structure. The molecular chain contains a large number of hydroxyl groups, which makes it have excellent barrier properties to gases. It is compatible with polyvinyl dichloride (PVDC) and polyamide ( PA) and known as the world's three major barrier resins. The gas barrier property of EVOH is 10,000 times that of polyethylene, 100 times that of PA, and 40 times that of PVDC. EVOH not only has excellent gas barrier properties, but also has good barrier properties to most organic chemicals such as oils, acids and solvents. Coupled with its good transparency, gloss, mechanical strength, abrasion resistance and antistatic properti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/02C08L23/06C08L23/00C08L23/08C08L31/04C08L31/02C08L23/16C08L51/06
Inventor 刘红旗唐舫成汪加胜
Owner GUANGZHOU LUSHAN NEW MATERIALS
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