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A kind of long glass fiber reinforced polypropylene composite material for automobile front-end module and preparation method thereof

A front-end module and composite material technology, which is used in the field of long-fiber reinforced polypropylene materials for automotive front-end modules and their preparation, and the field of long-glass fiber reinforced polypropylene composite materials, which can solve the problems of insufficient strength and rigidity, warping and deformation of parts, and structural design. complex problems, to achieve the effects of strong mechanical properties, reduced warpage deformation, and good economic value

Active Publication Date: 2022-05-27
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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  • A kind of long glass fiber reinforced polypropylene composite material for automobile front-end module and preparation method thereof
  • A kind of long glass fiber reinforced polypropylene composite material for automobile front-end module and preparation method thereof
  • A kind of 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] Respectively, 65 mass parts of the modified polypropylene resin, and 4 mass parts of the compatibilizer, 1 mass of antioxidants into the high mixer mixed evenly, and then added to the twin screw extruder melt plasticization, and then through the wetting die, set the extruder each section temperature of 200-260 °C, cavity temperature of 260 °C, the main engine speed of 350 °C. Then the ordinary LFT long glass fiber and flat LFT long glass fiber are immersed in the mold cavity after traction, and the traction speed is adjusted, so that the surface of the LFT long glass fiber is fully and uniformly wrapped and infiltrated with PP raw materials. After the infiltrated glass fiber bundle is cut through the cold water tank after water cooling, particles with a length of 10-12 mm are obtained, and the particle glass fiber ash is divided into 30. The two types of long glass fiber reinforced polypropylene particles are then blended to obtain the final front-end module with long glass...

Embodiment 2

[0040] Respectively, 65 mass parts of the modified polypropylene resin, and 4 mass parts of the compatibilizer, 1 mass of antioxidants into the high mixer mixed evenly, and then added to the twin screw extruder melt plasticization, and then through the wetting die, set the extruder each section temperature of 200-260 °C, cavity temperature of 260 °C, the main engine speed of 350 °C. Then the ordinary LFT long glass fiber and flat LFT long glass fiber are immersed in the mold cavity after traction, and the traction speed is adjusted, so that the surface of the LFT long glass fiber is fully and uniformly wrapped and infiltrated with PP raw materials. After the infiltrated glass fiber bundle is cut through the cold water tank after water cooling, particles with a length of 10-12 mm are obtained, and the particle glass fiber ash is divided into 30. The two types of long glass fiber reinforced polypropylene particles are then blended to obtain a final front-end module reinforced polypr...

Embodiment 3

[0042]Respectively, 65 mass parts of the modified polypropylene resin, and 4 mass parts of the compatibilizer, 1 mass of antioxidants into the high mixer mixed evenly, and then added to the twin screw extruder melt plasticization, and then through the wetting die, set the extruder each section temperature of 200-260 °C, cavity temperature of 260 °C, the main engine speed of 350 °C. Then the ordinary LFT long glass fiber and flat LFT long glass fiber are immersed in the mold cavity after traction, and the traction speed is adjusted, so that the surface of the LFT long glass fiber is fully and uniformly wrapped and infiltrated with PP raw materials. After the infiltrated glass fiber bundle is cut through the cold water tank after water cooling, particles with a length of 10-12 mm are obtained, and the particle glass fiber ash is divided into 30. The two types of long glass fiber reinforced polypropylene particles are then blended to obtain the final front module with long glass fibe...

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Abstract

The invention discloses a long glass fiber reinforced polypropylene composite material for automobile front-end modules and a preparation method thereof. It consists of the following raw materials in weight percentage: 20-90 parts of polypropylene resin, 10-60 parts of ordinary LFT long glass fiber, Flat LFT long glass fiber 10-60 parts, compatibilizer 1-10 parts, 0.1-5 antioxidant additives. The polypropylene resin, compatibilizer, and antioxidant are uniformly mixed and then melted and extruded through an extruder into a special impregnation mold cavity. Ordinary LFT long glass fibers and flat LFT long glass fibers are used to pass through the mold cavity for pulling. Pull, complete the infiltration, and then cool and pelletize to obtain two different types of long fiber reinforced polypropylene resins, and then blend the two types of long glass fiber particles in a certain proportion to obtain the finished product. The long glass fiber reinforced polypropylene composite material prepared by the invention has better impact resistance, higher stiffness and strength, lower warpage, higher dimensional stability and molding accuracy, and can be well suitable for preparing automobile front-end modules. .

Description

Technical field [0001] The invention relates to long glass fiber reinforced polypropylene composite materials, specifically to long fiber reinforced polypropylene materials for automobile front-end modules and their preparation methods, and belongs to the field of polymer modified composite materials. Background technique [0002] The automobile front-end module mainly plays the role of carrying the cooling module and the hair cover 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 collision sensors. , calf protection bar, front buffer beam, etc. Depending on the materials used, automobile front-end modules can be divided into all-metal front-end modules, metal-plastic hybrid front-end modules, and all-plastic composite front-end modules. At present, in the context of climate warming and energy shortage, automobile lightweighting is an important direction for automo...

Claims

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Application Information

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Patent Type & Authority Patents(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