Low-shrinkage and low-density modified polypropylene composite material and preparation method thereof

A composite material and polypropylene technology, applied in the field of low shrinkage, low density modified polypropylene composite material and its preparation, can solve the problem of affecting the flow characteristics of polypropylene melt, unfavorable processing of polypropylene composite material, and affecting the comprehensive performance of materials, etc. Problems, to achieve good market prospects and economic benefits, low density, low shrinkage effect
CN107501735AInactive Publication Date: 2017-12-22BEIJING INST OF AEROSPACE TESTING TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING INST OF AEROSPACE TESTING TECH
Publication Date
2017-12-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a low-shrinkage and low-density modified polypropylene composite material and a preparation method thereof. The polypropylene composite material is prepared from the following raw materials in percentage by weight: 50 percent to 80 percent of polypropylene (PP), 5 percent to 40 percent of long fiber enhanced resin, 1 percent to 10 percent of a compatilizer, 1 percent to 20 percent of a toughening agent, 0.2 percent to 1 percent of an antioxidant and 0.2 percent to 1 percent of an anti-UV (Ultraviolet) agent. According to the preparation method provided by the invention, after the long fiber enhanced resin is prepared, the long fiber enhanced resin, the PP and other components are blended to uniformly disperse fibers in a polypropylene melt and the performance of the composite material is greatly improved. The low-shrinkage and low-density modified polypropylene composite material provided by the invention has excellent mechanical properties and also has the characteristics of low shrinkage rate and low density.
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Description

technical field

[0001] The invention relates to the technical field of polymer materials, in particular to a low-shrinkage, low-density modified polypropylene composite material and a preparation method thereof. Background technique

[0002] Modified polypropylene composite material is one of the materials widely used in the automobile industry. Due to the large shrinkage rate of pure polypropylene resin, easy shrinkage and deformation, and low heat distortion temperature, talcum powder, calcium carbonate, barium sulfate or silica fume are usually used Mineral fillers such as stone are filled with modified polypropylene to reduce its shrinkage and improve dimensional stability and heat distortion temperature. Taking the materials of automobile bumpers, instrument panels and door panels as examples, they are generally filled with 20% mineral fillers.

[0003] Although the shrinkage of mineral-filled modified polypropylene has been improved, its density has increased from 0.9...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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