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A kind of glass fiber reinforced polypropylene compound and preparation method thereof

A technology of polypropylene and composites, which is applied in the field of glass fiber reinforced polypropylene composites and its preparation, can solve the problems of high price and poor comprehensive performance of 7-micron-diameter chopped glass fibers, and improve rigidity, performance, and good performance. The effect of cost performance

Active Publication Date: 2018-02-16
SHANGHAI KINGFA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current ordinary short glass fiber reinforced PP uses 14 micron diameter chopped glass fiber, which has poor comprehensive performance. Using 7 micron diameter chopped glass fiber, the comprehensive performance can be significantly improved, but 7 micron diameter chopped glass fiber The price of glass fiber is very high, all use 7 micron diameter chopped glass fiber, the cost of short fiber reinforced PP is not superior to that of nylon and LFTPP

Method used

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  • A kind of glass fiber reinforced polypropylene compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 75kg polypropylene, 0.2kg phenolic heat stabilizer, 0.3kg phosphite heat stabilizer 168, 0.3kg ethylene bis stearamide, 0.2kg aryl phosphate salt nucleating agent, 4kg maleic anhydride Branched polypropylene was melt-mixed and dispersed in a twin-screw extruder with an aspect ratio of 40:1. Subsequently, 10 kg of chopped glass fibers with a diameter of 14 microns and 10 kg of chopped glass fibers with a diameter of 7 microns are accurately fed from the side through a weight loss weighing scale, extruded and granulated at 200 ° C, and finally the product is obtained.

[0042] The models and manufacturers of the above raw materials are shown in the table below:

[0043] raw material

Embodiment 2

[0045] 52kg polypropylene PP HX3800, 0.5kg phenolic heat stabilizer 1010, 0.5kg phosphite heat stabilizer 168, 0.5kg ethylene bisstearamide, 0.5kg aryl phosphate nucleating agent, 6kg Malay Anhydride-grafted polypropylene was melt-mixed and dispersed in a twin-screw extruder with an aspect ratio of 40:1. Subsequently, 20kg of chopped glass fibers with a diameter of 14 microns and chopped glass fibers with a diameter of 7 microns were accurately fed from the side through a weight-loss weighing scale, extruded and granulated at 200° C., and finally the product was obtained.

[0046] The models and manufacturers of the above raw materials are shown in the table below:

[0047] raw material

Embodiment 3

[0049] 38kg of polypropylene, 1kg of phenolic heat stabilizer, 1kg of phosphite heat stabilizer, 1kg of ethylene bisstearamide, 1kg of talcum powder, and 8kg of maleic anhydride-grafted polypropylene were placed in a 1:40 aspect ratio Melt mixing and dispersion in a twin-screw extruder. Subsequently, 30 kg of chopped glass fibers with a diameter of 14 microns and 20 kg of chopped glass fibers with a diameter of 7 microns were accurately fed from the side through a weight loss weighing scale, extruded and granulated at 200 ° C, and finally the product was obtained.

[0050] The models and manufacturers of the above raw materials are shown in the table below:

[0051] raw material

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Abstract

The invention discloses a glass fiber-reinforced polypropylene compound, which is characterized in that the compound comprises the following components by weight percent: 24 to 78 percent of polypropylene, 0 to 2 percent of heat stabilizer, 0 to 2 percent of processing agent, 0 to 2 percent of nucleating agent, 2 to 10 percent of compatilizer, 10 to 30 percent of chopped glass fiber A and 10 to 30 percent of chopped glass fiber B; the diameter of the chopped glass fiber A is 14 microns, and the diameter of the chopped glass fiber B is 7 microns. The invention also discloses a preparation method of the glass fiber-reinforced polypropylene compound. Compared with the prior art, the 14-micron-diameter chopped glass fiber and the 7-micron-diameter chopped glass fiber are adopted as raw materials, so that not only is the property of the existing glass fiber-reinforced polypropylene remarkably improved, but also a good cost performance is kept.

Description

technical field [0001] The invention relates to the field of polymer materials and their molding processing, in particular to a glass fiber reinforced polypropylene compound and a preparation method thereof. Background technique [0002] With the development of the automobile industry, the competition in the automobile market is becoming more and more fierce, and the cost requirements for automobile materials are getting higher and higher. [0003] Traditional automotive engine peripheral parts are generally made of glass fiber reinforced nylon and LFTPP materials, and car sunroofs and instrument panel frames are generally made of LFTPP, while glass fiber reinforced nylon and LFTPP are very expensive and cannot adapt to the development of the automotive industry. Requirements, in order to meet the material requirements of the development of the automobile industry, short glass fiber reinforced polypropylene (also known as "short glass fiber reinforced PP") is more and more w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L51/06C08K13/04C08K7/14
CPCC08K2201/003C08L23/12C08L51/06C08K13/04C08K7/14
Inventor 孙刚陈延安程文超李国明李志平
Owner SHANGHAI KINGFA SCI & TECH