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Glass fiber reinforced polypropylene composite material with high weld mark strength and preparation method therefor

A composite material, grafting polypropylene technology, applied in the field of high weld line strength glass fiber reinforced polypropylene composite material and its preparation, can solve the problem of unexplained mechanism, etc., to increase the intermolecular force and improve the weld line strength. Effect

Active Publication Date: 2020-02-21
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the description does not explain the mechanism, it may be that the level of entanglement between resin molecules has been increased

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with the claims and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] The raw materials used in the embodiments of the present invention and comparative examples are as follows:

[0029] Homopolypropylene: Maoming Petrochemical PP N-Z30S, MFR 25g / 10min;

[0030] Copolymerized polypropylene: Korea SK Chemical PP BX3800, MFR is 27g / 10min;

[0031] Maleic anhydride grafted polypropylene A: graft rate 1.8%, melt flow rate 80g / 10min;

[0032] Maleic anhydride grafted polypropylene B: graft rate 0.8%, melt flow rate 89g / 10min;

[0033] Maleic anhydride grafted polypropylene C: graft rate 0.3%, melt flow rate 102g / 10min;

[0034] Maleic anhydride grafted polypropylene ...

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Abstract

The invention provides a glass fiber reinforced polypropylene composite material with high weld mark strength. The glass fiber reinforced polypropylene composite material comprises the following ingredients in parts by weight: 100 parts of homopolymerized polypropylene, 1-10 parts of maleic anhydride grafted polypropylene, 1-10 parts of PA6 and 1-50 parts of glass fibers, wherein the PA6 is in a molecular weight range of 5,000 to 10,000. According to the glass fiber reinforced polypropylene composite material with high weld mark strength and the preparation method therefor, through adding a certain amount of the PA6 with a specific molecular weight range into the homopolymerized polypropylene, the weld line strength of glass fiber reinforced polypropylene can be improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a glass fiber reinforced polypropylene composite material with high weld line strength and a preparation method thereof. Background technique [0002] After reinforced with glass fiber, polypropylene can greatly improve its strength, rigidity, impact strength and heat distortion temperature, so it is widely used in automobiles, building materials, home appliances and other industries. However, in the application process, it is often found that the position of the weld line of the reinforced polypropylene injection molded part becomes the failure initiation point of the part. This is because although the addition of glass fiber can greatly improve the strength of the material, it is difficult to improve the strength of the weld line. In general, the strength of glass fiber-reinforced weld lines is not higher than that of matrix resin, which is mainly due to the poor com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/06C08L77/02C08K7/14C08J5/04
CPCC08J5/043C08J2323/12C08J2451/06C08J2477/02C08K7/14
Inventor 陈大华谭寿再陈金伟何亮刘青山
Owner GUANGDONG IND TECHN COLLEGE
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