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Organic fiber reinforced polypropylene composite material and LFT-D forming process thereof

A technology of LFT-D and composite materials, which is applied in the field of polymer composite materials and machinery, can solve the problems of high product density, serious floating fibers on the product surface, and unfavorable weight reduction of automobiles, and achieve the balance of rigidity and toughness, and improve the impact strength. Effect

Inactive Publication Date: 2016-10-12
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent discloses a polypropylene material for the production of automobile bottom guard plates, which uses glass fiber to reinforce polypropylene, but the surface of the product has serious floating fibers, and the product density is high, which is not conducive to the promotion of automobile lightweight

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 80 parts of dry polypropylene BX3900 (Korea SK), 3 parts of compatibilizer PP-g-MAH, 0.05 part of antioxidant 1010, 0.05 part of antioxidant 168, black masterbatch PE2772 according to weight ratio 5 parts, flame retardant decabromodiphenylethane is 10 parts, flame retardant antimony trioxide is 5 parts, add the above materials into a high-speed mixer and mix them evenly, and then add the evenly mixed mixture into the extruder , pelletized after water cooling, and prepared into a polypropylene composition. The composition is melted and plasticized by a first-stage twin-screw extruder, and then the plasticized block and the cut organic carbon fiber are melted and plasticized by the second-stage screw from the feed port at a mass ratio of 60 / 40, and finally the plasticized block is cut. The blocks are put into the mold by a robot and molded into a building formwork.

Embodiment 2

[0029] Weigh 85 parts of dry polypropylene S2040 (Shanghai Secco), 0.1 part of compatibilizer PP-g-MAH, 0.1 part of antioxidant 1010, 0.1 part of antioxidant 168, antioxidant The DSTDP is 0.3, the lubricant EBS (ethylene bis stearamide) is 0.2 parts, the light stabilizer V703 (American Cytec) is 0.2 parts, the toughening agent POE is 10 parts, and the red masterbatch is 3 parts. Add the above materials Mix uniformly in a high-speed mixer, then feed the uniformly mixed mixture into an extruder, water-cool and then pelletize to prepare a polypropylene composition. The composition is melted and plasticized through a first-stage twin-screw extruder, and then the plasticized block and the cut PA6 fiber are melted and plasticized by the second-stage screw from the feed port at a mass ratio of 70 / 30, and finally the plasticized block is cut. The blocks are put into the mold by a robot and molded into a building formwork.

Embodiment 3

[0031] Weigh 90 parts of dry polypropylene HI828 (Korea Samsung), 1 part of compatibilizer PP-g-GMA, 0.1 part of antioxidant 1010, 0.1 part of antioxidant 168, and 0.1 part of antioxidant DSTDP according to the weight ratio. 0.2 parts, white oil 36# is 0.2 parts, light stabilizer V680 (American Cytec) is 0.2 parts, flame retardant P602 is 10 parts, red masterbatch is 3 parts, add the above materials into a high-speed mixer and mix evenly , and then put the homogeneous mixture into the extruder, water-cooled and pelletized to prepare a polypropylene composition. The composition is melted and plasticized through a first-stage twin-screw extruder, and then the plasticized block and cut PA66 fiber enter the second-stage screw from the feed port to be melted and plasticized at a mass ratio of 70 / 30, and finally the plasticized block is cut. The blocks are placed into the mold by the robot and molded into the battery base.

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Abstract

The invention discloses an organic fiber reinforced polypropylene composite material and an LFT-D forming process thereof. The polypropylene composite material is formed by compounding of a polypropylene composition and organic fiber, and the polypropylene composition is prepared from the following components by weight: 80-100 parts of polypropylene, 0.1-3 parts of a compatilizer, 0.1-0.5 part of an antioxidant, and 0-20 parts of other assistants. The LFT-D forming process of the organic fiber reinforced polypropylene composite material includes: subjecting a polypropylene composite material to melting plastification by a first-order screw extruder, then subjecting the treated polypropylene composite material and organic fiber together to melting plastification again, then performing block cutting, and finally putting the block melt into a die to conduct die pressing, thus obtaining a finished product. The LFT-D production process of the organic fiber reinforced polypropylene has short forming cycle, and the formed product has the advantages of complex structure, large size, high strength, and good toughness.

Description

technical field [0001] The invention belongs to the field of polymer composite materials and machinery, and in particular relates to an organic fiber reinforced polypropylene composite material and an LFT-D forming process thereof. technical background [0002] Long fiber reinforced thermoplastics (LFT for short) is a kind of thermoplastic composite material, and it is also a hot spot in the development of thermoplastic composite materials abroad. The material has the characteristics of light weight, high strength, environmental protection and recyclability, and is widely used in automobile, construction, shipbuilding, aerospace and other industries. The LFT-D production line is an online composite molding production line for long fiber reinforced thermoplastics. It composites fibers and thermoplastic resins online and directly molds them into different products. The production line is mainly composed of three parts, namely extrusion, handling (robot), molding (press). The...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L51/06C08L77/02C08L77/06C08L67/00B29C47/92B29C48/92
Inventor 杨桂生徐芹汪海
Owner HEFEI GENIUS NEW MATERIALS
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