PP is used in a large amount in general plastics, which has the advantages of low density, flex resistance, chemical corrosion resistance, good insulation, etc., but its low temperature impact resistance is poor, it is easy to age, and the shrinkage rate is large. The molding shrinkage rate of PP Between 1.0% and 2.5%, which severely limits its application in some precision fields, it is very important to control the shrinkage rate of PP. PP granules is a highly crystalline plastic, so the shrinkage is mainly due to its high crystallinity. Controlling the molding shrinkage of PP raw materials is mainly to control the crystallinity of its raw materials during molding.
Long glass fiber reinforced thermoplastic material is called LFT or LFRT, it is a new type of plastic material. Since the separation of the long fibers in the flow direction is different from the arrangement of the short fibers, the homogeneity of the long fibers is high.
The arrangement of short fibers in the flow direction is irregular,
The arrangement of PP long fibers in the direction of flow is orderly. The production of polypropylene pellets includes injection molding, extrusion molding, blow molding and other processing methods.
The long fiber is impregnated with a special resin system to obtain a long strip which is sufficiently wetted by the resin，and the cut into a desired length as required.
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1.Auoto parts：Bumper, instrument panel, battery bracket, chassis cover, noise baffle, rear door baffle, seat support frame, front-end components, etc.
2.Daily necessities: Common PP is commonly used in injection stools, buckets, basins, office supplies, furniture, turnover boxes, etc.
3.Electrical appliances: Modified plastic raw material PP can be used in washing machine drums, TV casings, fan blades of electric fans, inner linings of refrigerators, etc.
4.PP LGF polymer can also used in scooter parts,paddle,skylight frame,pipe fittings etc.
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