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Long glass fiber reinforced polypropylene composite material for automobile front-end module and preparation method thereof

A technology for front-end modules and composite materials, applied in the field of long fiber reinforced polypropylene materials for automotive front modules and its preparation, and long glass fiber reinforced polypropylene composite materials, which can solve the problems of insufficient strength and rigidity, complex structural design, and parts warping Deformation and other problems, achieve strong mechanical properties, good economic value, and reduce warping and deformation

Active Publication Date: 2020-05-08
SHANGHAI PRET COMPOSITES +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the front-end module has high requirements on the stiffness, dimensional stability, impact resistance and humidity-heat aging performance of the material itself. Polypropylene has gradually become difficult to fully meet the needs of the design and use of front-end modules. It is often reflected in the warping and deformation of parts, severe post-shrinkage, insufficient strength and rigidity, difficulty in assembly, and affecting use.

Method used

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  • Long glass fiber reinforced polypropylene composite material for automobile front-end module and preparation method thereof
  • Long glass fiber reinforced polypropylene composite material for automobile front-end module and preparation method thereof
  • Long glass fiber reinforced polypropylene composite material for automobile front-end module and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] Weigh 65 parts by mass of modified polypropylene resin, and 4 parts by mass of compatibilizer, 1 part by mass of antioxidant is placed in a high mixer and mixed evenly, then added to a twin-screw extruder for melting and plasticization, and then Pass it into the soaking die head, set the temperature of each section of the extruder to 200-260°C, the temperature of the mold cavity to 260°C, and the speed of the main engine to 350°C. Then the ordinary LFT long glass fiber and the flat LFT long glass fiber are dipped into the mold cavity after being drawn, and the drawing speed is adjusted so that the surface of the LFT long glass fiber is fully and evenly wrapped and infiltrated with PP raw materials. The infiltrated glass fiber bundles are water-cooled in a cold water tank and then cut into pellets to obtain particles with a length of 10-12mm, and the glass fiber ash content of the particles is 30. Then the two types of long glass fiber reinforced polypropylene particles ...

Embodiment 2

[0040] Weigh 65 parts by mass of modified polypropylene resin, and 4 parts by mass of compatibilizer, 1 part by mass of antioxidant is placed in a high mixer and mixed evenly, then added to a twin-screw extruder for melting and plasticization, and then Pass it into the soaking die head, set the temperature of each section of the extruder to 200-260°C, the temperature of the mold cavity to 260°C, and the speed of the main engine to 350°C. Then the ordinary LFT long glass fiber and the flat LFT long glass fiber are dipped into the mold cavity after being drawn, and the drawing speed is adjusted so that the surface of the LFT long glass fiber is fully and evenly wrapped and infiltrated with PP raw materials. The infiltrated glass fiber bundles are water-cooled in a cold water tank and then cut into pellets to obtain particles with a length of 10-12mm, and the glass fiber ash content of the particles is 30. Then the two types of long glass fiber reinforced polypropylene particles ...

Embodiment 3

[0042] Weigh 65 parts by mass of modified polypropylene resin, and 4 parts by mass of compatibilizer, 1 part by mass of antioxidant is placed in a high mixer and mixed evenly, then added to a twin-screw extruder for melting and plasticization, and then Pass it into the soaking die head, set the temperature of each section of the extruder to 200-260°C, the temperature of the mold cavity to 260°C, and the speed of the main engine to 350°C. Then the ordinary LFT long glass fiber and the flat LFT long glass fiber are dipped into the mold cavity after being drawn, and the drawing speed is adjusted so that the surface of the LFT long glass fiber is fully and evenly wrapped and infiltrated with PP raw materials. The infiltrated glass fiber bundles are water-cooled in a cold water tank and then cut into pellets to obtain particles with a length of 10-12mm, and the glass fiber ash content of the particles is 30. Then the two types of long glass fiber reinforced polypropylene particles ...

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Abstract

The invention discloses a long glass fiber reinforced polypropylene composite material for an automobile front-end module and a preparation method thereof. The composite material is composed of the following raw materials in parts by weight: 20 to 90 parts of polypropylene resin, 10 to 60 parts of common LFT long glass fibers, 10 to 60 parts of flat LFT long glass fibers, 1 to 10 parts of a compatilizer and 0.1 to 5 parts of an antioxidant aid. The preparation method comprises the following steps: uniformly mixing the polypropylene resin, the compatilizer and the antioxidant, and carrying outmelt extrusion by an extruder; putting a product of the invention into a specially-made dipping mold cavity, allowing the common LFT long glass fibers and the flat LFT long glass fibers to penetrate through the mold cavity for drawing, and completing infiltration; then carrying out cooling and pelletizing to obtain two different types of long fiber reinforced polypropylene resin; and then blendingthe two types of long glass fiber particles according to a certain proportion to obtain a finished product. The long glass fiber reinforced polypropylene composite material prepared by the inventionhas the advantages of better impact resistance, higher rigidity and strength, low warping degree, higher dimensional stability and higher forming precision, and is well applicable to preparation of the automobile front-end module.

Description

technical field [0001] The invention relates to a long glass fiber reinforced polypropylene composite material, in particular to a long fiber reinforced polypropylene material for an automobile front-end module and a preparation method thereof, belonging to the field of polymer modified composite materials. Background technique [0002] The front-end module of the car mainly plays the role of carrying the cooling module and the hood lock. As the degree of integration becomes higher and higher, more and more parts must be fixed on the front-end module, such as headlights, buffer blocks, and frontal impact sensors. , calf protection bar, front buffer beam, etc. According to the different materials used, the front-end modules of automobiles can be divided into all-metal front-end modules, metal-plastic mixed front-end modules, and all-plastic composite front-end modules. At present, under the background of climate warming and energy shortage, automobile lightweight is an impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/06C08K7/14C08J5/04
CPCC08J5/043C08J2323/12C08J2451/06C08K2201/014C08K7/14
Inventor 姚代川张中伟张杨赵卫哲蔡青周文
Owner SHANGHAI PRET COMPOSITES