Isolating polypropylene composite material and preparation method thereof

A composite material and polypropylene technology, applied in the field of composite material preparation, can solve the problems of complex multi-layer co-extrusion process, low EVOH strength, unsuitable for popularization and use, etc., and achieve high toughness, low production cost, high gas barrier effect

Inactive Publication Date: 2010-01-27
洛阳石化吉润化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low strength of EVOH, the current EVOH barrier film is generally produced by multi-layer co-extrusion with other polymers. In recent years, a coated EVOH film has been developed.
Howeve

Method used

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  • Isolating polypropylene composite material and preparation method thereof
  • Isolating polypropylene composite material and preparation method thereof
  • Isolating polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 20 parts (by weight, the same below) of ethylene-vinyl alcohol copolymer and 80 parts of polypropylene into a twin-screw extruder at 180° C. for melt blending and extrusion. Test the gas barrier performance of the extrudate: the water vapor transmission rate (38, 90% RH) is 2996g·μm / (m 2 24h).

Embodiment 2

[0027] 98.8wt% of PP, 1wt% of maleic anhydride and 0.2wt% of 2,5-dimethyl-2,5-bis(t-butylperoxy)hexane were melt-grafted at 170°C to obtain PPMA ; 100 parts of PPMA and 5 parts of ethylene-vinyl alcohol copolymer are blended and extruded in a twin-screw extruder at 110°C, and the product is a compatibilizer.

[0028] Melt and knead 80 parts of polypropylene, 20 parts of ethylene-vinyl alcohol copolymer and 1 part of compatibilizer in a twin-screw mixer at 180°C to prepare a polypropylene composite material, and test its gas barrier Performance: Water vapor transmission rate (38°C, 90%RH) is 2158g·μm / (m 2 24h).

Embodiment 3

[0030] 90wt% of PP, 9.5wt% of maleic anhydride and 0.5wt% of 1,4-bis(tert-butylperoxy)dicumene were melt-grafted at 180°C to obtain PPMA; 100 parts of PPMA and 10 parts of ethylene-vinyl alcohol copolymer in a twin-screw extruder at 130°C for blending reaction and extruding, and the product is a compatibilizer.

[0031] Melt and knead 80 parts of polypropylene, 20 parts of ethylene-vinyl alcohol copolymer and 3 parts of compatibilizer in a twin-screw mixer at 190°C to prepare a polypropylene composite material, and test its gas barrier Performance: Water vapor transmission rate (38°C, 90% RH) is 2097g·μm / (m 2 24h).

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Abstract

The invention discloses an isolating polypropylene composite material which is prepared from the following components in terms of parts by weight: 60-80 parts of polypropylene, 20-40 parts of ethylene-vinyl alcohol copolymer and 1-10 parts of compatilizer. Meanwhile, the invention also discloses a preparation method of the isolating polypropylene composite material. The isolating polypropylene composite material has high tenacity, and the impact strength thereof is as high as 210 J/m or so. In addition, the isolating polypropylene composite material has high gas isolation capability, and water vapor permeation speed can be approximately 2000 g*um/(m<2>*24h). The isolating polypropylene composite material has both high gas isolation capability and high tenacity, therefore when the isolating polypropylene composite material is used for preparing an isolating film, a traditional film making process can be adopted, wherein the process is relatively simple and the production cost is relatively low. The isolating polypropylene composite material has a prospect for generalized application.

Description

technical field [0001] The invention relates to a barrier polypropylene composite material, and also relates to a preparation method of the composite material. Background technique [0002] Polypropylene (PP) is a thermoplastic with an average molecular weight of 100,000 to 150,000 and a specific gravity of 0.89 to 0.91cm 3 , with a melting point of 164-170°C. Since PP molecules are catalyzed and polymerized by non-polar propylene, the molecular structure is carbon-carbon and carbon-hydrogen saturated bonds, so it has excellent electrical insulation and chemical stability. However, its gas barrier properties are extremely poor, which hinders the further expansion of its application fields. [0003] Ethylene-vinyl alcohol copolymer (EVOH) is made by saponification and hydrolysis of ethylene and vinyl acetate copolymer (EVA). It has good molding processability, good gas barrier property, fragrance retention, oil resistance and drug resistance. Quality, transparency, especia...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/08C08L87/00
Inventor 赵振辉张力梁万军张玉清高喜平曹豫新赫玉欣周保森席志武王胜利赵均黑云志
Owner 洛阳石化吉润化工有限责任公司
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