Glass fiber reinforced polypropylene

A technology of polypropylene and copolymerized polypropylene, which is applied in the field of organic materials, can solve the problems of affecting the performance of finished products, not smooth enough, rough products, etc., and achieve the effect of increasing the output rate of finished products, reducing labor costs, and having a smooth and beautiful appearance

Active Publication Date: 2015-04-22
宁波龙洋塑化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, glass fiber reinforced polypropylene is generally prepared from polypropylene, glass fiber, compatibilizer and lubricant. However, in the production process of glass fiber reinforced polypropylene, the glass fiber is difficult to cut, so that the length of the glass fiber is too long and the dispersion Uneven, the inside of the bundled glass fiber cannot be effectively wetted with the resin, so there is stress concentration in the bundled glass fiber, which often blocks the mold hole, causing a bunch of glass fibers to be brought out with the material strip at the exit of the mold hole Fuzz and broken strips make the product look rough and not smooth enough
In order to solve this problem, the existing method is usually to enhance the shearing capacity of the extruder screw, but if the shearing capacity is too large, the glass fiber will be sheared too much, which will affect the performance of the finished product

Method used

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  • Glass fiber reinforced polypropylene
  • Glass fiber reinforced polypropylene
  • Glass fiber reinforced polypropylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The raw materials are weighed according to the weight ratio, and the copolymerized polypropylene: 50%; the homopolypropylene: 14.45%; the compatibilizer: 5%; the lubricant: 0.5%; and the titanium dioxide 0.05%. The above-mentioned mixed materials are fed into the twin-screw extruder, and glass fibers with a weight ratio of 30% are added through side feeding, and then extruded and pelletized. The processing method of the glass-reinforced polypropylene is the same as that of the prior art, and the processing conditions are as follows: the extrusion temperature is 180-230°C, the rotating speed of the screw is 320r / min, and the injection molding temperature is 190-210°C. The glass fiber reinforced polypropylene obtained according to the above weight ratio has been tested to obtain the following physical property test data: the tensile strength is 82.53MPa; the elongation is 5.66%, the bending strength is 115.5MPa, the bending modulus is 5290MPa, and the notched impact streng...

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Abstract

The invention discloses glass fiber reinforced polypropylene which comprises the following components in percentage by weight: 64.45 percent of polypropylene, 30 percent of glass fibers, 5 percent of a compatilizer, 0.5 percent of a lubricating agent and 0.05 percent of titanium dioxide. The glass fiber reinforced polypropylene disclosed by the invention has the technical effects that because the titanium dioxide is added into the glass fiber reinforced polypropylene, the shear capacity of an extruder screw does not need to be enhanced in the material production process, the interior of the glass fibers can be effectively wetted with resins, the manufactured product is smooth and attractive in surface, and the performance is not influenced.

Description

technical field [0001] The invention belongs to the technical field of organic materials, and in particular relates to a glass fiber reinforced polypropylene. Background technique [0002] As a general-purpose engineering plastic, glass fiber-reinforced polypropylene has excellent properties such as high strength, high stiffness, rigid impact strength, low density, low warpage creep, and dynamic fatigue resistance. It is widely used in automobiles due to its high cost performance , home appliances and other structural parts, replacing metal, short glass fiber reinforced nylon and other materials. At present, glass fiber reinforced polypropylene is generally prepared from polypropylene, glass fiber, compatibilizer and lubricant. However, in the production process of glass fiber reinforced polypropylene, the glass fiber is difficult to cut, so that the length of the glass fiber is too long and the dispersion Uneven, the inside of the bundled glass fiber cannot be effectively ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/12C08L51/06C08K13/04C08K7/14C08K3/22C08K5/20C08K5/098
CPCC08L23/14C08L2205/02C08L2205/03C08L23/12C08L51/06C08K13/04C08K7/14C08K2003/2237
Inventor 虞旭晶马青林
Owner 宁波龙洋塑化科技有限公司
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