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Continuous fiber-reinforced thermoplastic resin prepreg and preparation method thereof

A technology of reinforced thermoplastic and continuous fiber, applied in the direction of chemical instruments and methods, layered products, lamination devices, etc., to achieve the effect of small fiber damage, ensure stability, and avoid thermal and oxygen aging

Inactive Publication Date: 2016-04-13
SHAANXI TIANCE NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a continuous fiber reinforced thermoplastic resin prepreg and its preparation method to solve the technical problems existing in the preparation process of traditional thermoplastic prepreg

Method used

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  • Continuous fiber-reinforced thermoplastic resin prepreg and preparation method thereof
  • Continuous fiber-reinforced thermoplastic resin prepreg and preparation method thereof
  • Continuous fiber-reinforced thermoplastic resin prepreg and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The selected density is 0.949g / cm 3 , a high-density polyethylene resin film matrix with a thickness of 0.0458mm, electronic grade glass fiber cloth 7628 as a continuous reinforcement material, and a control glue content of 30%. Cut the fiber cloth and resin film into a square of 400*400mm, and blow the fiber cloth and resin film with hot air at a temperature of about 120°C to remove impurities and achieve the purpose of drying. Store the treated material in an oven at 105°C to prevent moisture regain. Use two plastic films to sandwich a layer of electronic grade glass fiber cloth 7628, according to figure 1 The method shown is placed in a press. The pre-set temperature of the press is 210°C. After the material is put into the press, close the safety door and start the program. The pressing program is 210°C, the pressure is 1.5MPa and the pressure is 180s, and the pressure is kept at 1.5MPa. The water cooling system that comes with the press is used to cool down. Mo...

Embodiment 2

[0083] The selected density is 0.851g / cm 3 , a polypropylene resin film matrix with a thickness of 0.051mm, electronic grade glass fiber cloth 7628 as a continuous reinforcement material, and the glue content is controlled at 30%. Cut the fiber cloth and resin film into a square of 400*400mm, rinse the fiber cloth and resin film with low boiling point solvents such as acetone, methanol, ethanol, etc. Dry in oven. Use two plastic films to sandwich a layer of electronic grade glass fiber cloth 7628, according to figure 1 The method shown is placed in a press. The pre-set temperature of the press is 230°C. After the material is put into the press, close the safety door and start the program. The pressing program is 230°C, the pressure is 0.4MPa for 60s, continue to increase the pressure to 0.8MPa and press for 60s, keep the pressure at 0.8MPa, and use the water cooling system that comes with the press to cool down. The cooling rate is controlled at 10-15°C / min. When the tempe...

Embodiment 3

[0085] The selected density is 1.34g / cm 3 , a polyphenylene sulfide resin film matrix with a thickness of 0.051mm, and unidirectional carbon fiber cloth as a continuous reinforcement material, and the control glue content is 40%. Cut the fiber cloth and resin film into a square of 400*400mm, rinse the fiber cloth and resin film with low boiling point solvents such as acetone, methanol, ethanol, etc. Dry in oven. Use two plastic films to sandwich a layer of unidirectional carbon fiber cloth, according to figure 1 The method shown is placed in a press. The pre-set temperature of the press is 320°C. After the material is put into the press, close the safety door and start the program. The pressing program is 320°C, the pressure is 0.4MPa, press for 60s, then raise the temperature to 330°C, increase the pressure to 0.8MPa and press for 60s, keep the pressure at 0.8MPa, use the water cooling system that comes with the press to cool down, and the cooling rate is controlled at 5-1...

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Abstract

The invention relates to a continuous fiber-reinforced thermoplastic resin prepreg and a preparation method thereof. Conventional preparation methods for prepreg normally have the defects of proneness to damage and deformation of fibers, great possibility of thermo-oxidative aging of resin and the like. The preparation method comprises the following steps: preparing reinforced fiber and a resin film according to a predetermined glue content, carrying out cutting and subjecting the reinforced fiber and the resin film to impurity removal, dedusting and drying; preheating a pressing machine and coating a die with a releasing agent for subsequent usage; sandwiching a layer of the reinforced fiber into two layers of the resin film and pressing the sandwiched reinforced fiber and resin film in the die at a maintained pressure; and carrying out rapid cooling so as to obtain the prepreg. Resin used in the invention is the resin film prepared in advance, so the content of resin in preparation of the prepreg can be ensured, and stability of the glue content of the prepared prepreg can be guaranteed; a pressurization mode is such that the whole prepreg is pressurized, so deviation of fibers caused by too great local pressure can be effectively prevented; fibers do not need to bear great radial load and tension force, so damage to the fibers is small; and molten resin does not contact with air, so thermo-oxidative aging of the resin is prevented.

Description

technical field [0001] The invention belongs to the technical field of resin-based composite materials, and in particular relates to a continuous fiber-reinforced thermoplastic resin prepreg and a preparation method thereof. Background technique [0002] Compared with traditional materials such as metals and inorganic materials, resin matrix composites have higher specific strength and specific modulus and are widely used. Resin-based composite materials are divided into thermosetting and thermoplastic composite materials. Compared with thermosetting composite materials, thermoplastic composite materials have the advantages of short molding cycle, environmental friendliness, and recyclability. [0003] Common thermoplastic prepregs are prepared by passing preheated fiber bundles through a melt pool filled with high-temperature, high-pressure resin melt. Coat the fiber bundles with resin, then pass the resin-coated fiber bundles through equipment such as oriented rollers and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/10
CPCB32B37/10
Inventor 杨泽诚江汛殷武雄聂挺
Owner SHAANXI TIANCE NEW MATERIAL TECH
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