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Thermoforming method of co-woven continuous fiber reinforced thermoplastic structural plate

A technology for reinforcing thermoplastic and structural panels, which is applied in the field of continuous fiber reinforced thermoplastic composite materials, which can solve the problems of mixed fiber resin bonding, influence of prepreg performance, and performance degradation of finished products, so as to reduce resin components, improve adaptability, and reduce loss Effect

Active Publication Date: 2012-05-30
LIAONING LIAOJIE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In production and processing, due to fiber production process conditions, surface treatment and other issues, the mixed fiber cannot be well combined with the resin, which will have a great impact on the performance of the produced prepreg, resulting in a decline in the performance of the finished product
Prepregs with different fibers in the same matrix are mostly produced by criss-cross laying at 0° and 90° in the production board, which will greatly increase the resin content during the production process, thereby reducing the fiber content and affecting performance. Medium, fibers tend to slide, wrinkle, wave

Method used

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  • Thermoforming method of co-woven continuous fiber reinforced thermoplastic structural plate
  • Thermoforming method of co-woven continuous fiber reinforced thermoplastic structural plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Glass fiber S reinforced polypropylene prepreg and glass fiber E reinforced polypropylene prepreg, the weight ratio is 1:2. Two prepregs with a width of 0.1m were placed on the creel of the weaving machine to weave evenly, and the two prepregs were woven into a mesh prepreg tape with a width of 1.2m. The glass fiber E reinforced polypropylene prepreg is the main body in the prepreg tape, and the glass fiber S reinforced polypropylene prepreg is uniformly dispersed in it.

[0027] Such as figure 1 As shown, cut the prepreg tape 1 to the same size as the mold 5, lay it in the mold 5, and cover it with a vacuum bag 2 (or polyester film). The size of the vacuum bag 2 is larger than the size of the mold 5. Fix and seal with clamping and sealing device 4, vacuum nozzle 6 is preset on vacuum bag 2, and its position is determined according to the shape of the mould. Connect the vacuum nozzle 6 to a vacuum pump or other vacuuming device 3, start electric heating (or oil heatin...

Embodiment 2

[0030] Carbon fiber reinforced nylon 1010 prepreg and glass fiber reinforced nylon 1010 prepreg, the weight ratio is 5:2. Two kinds of prepregs with a width of 0.1m were respectively placed on the creel of the weaving machine to weave evenly, and the two kinds of prepregs were woven into a sheet-like prepreg tape with a width of 1.4m. In the prepreg, the carbon fiber reinforced nylon 1010 prepreg is the main body, and the glass fiber reinforced nylon 1010 prepreg is uniformly dispersed therein.

[0031] Cut the prepreg tape to the same size as the mold, lay it in the mold, cover it with a vacuum bag (or polyester film), the size of the vacuum bag is larger than the size of the mold, fix and seal the periphery of the vacuum bag with a clamping sealing device, The vacuum nozzle is preset on the vacuum bag, and its position is determined according to the shape of the mold. Connect the vacuum nozzle to the vacuum pump (or other vacuuming device), start electric heating (or oil he...

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Abstract

The invention discloses a thermoforming method of a co-woven continuous fiber reinforced thermoplastic structural plate. The method comprises: first co-weaving prepreg into sheet or band prepreg on a braiding machine; spreading the prepreg on a die and conducting sealing with a vacuum bag or a polyester film; then raising the temperature, carrying out vacuum pumping to maintain a vacuum negative pressure, when the temperature reaches the melting point of thermoplastic resin, preserving the heat for a period of time, then performing cooling for molding; finally dismounting the vacuum bag or the polyester film so as to obtain a structural plate. The structural plate produced by the co-weaving method can expel air among the internal layers of the prepreg. Pressure is transmitted uniformly through fibers, so that shift in fiber direction can be avoided, and the structural plate also can be reinforced based on original enhanced fibers, thus substantially saving cost.

Description

technical field [0001] The invention relates to a continuous fiber-reinforced thermoplastic composite material, in particular to a thermoforming method for a "mixed braided" continuous fiber-reinforced thermoplastic structural plate. Background technique [0002] Thermoplastic composite materials are a general term for various thermoplastic resins reinforced with glass fibers, carbon fibers, and aramid fibers, and are called FRTP (Fiber Rinforced Thermo Plastics) abroad. Due to the different types of thermoplastic resins and reinforcing materials, the production process and the performance of the composite materials are very different. From the perspective of production technology, thermoplastic composite materials are divided into two categories: short fiber reinforced composite materials and continuous fiber reinforced composite materials. (1) Short fiber reinforced composite materials: ①Injection molding process, ②Extrusion molding process, ③Centrifugal molding Process; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34
Inventor 康楠
Owner LIAONING LIAOJIE SCI & TECH
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