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A kind of ultra-thin prepreg and preparation method thereof

A prepreg, ultra-thin technology, applied in the field of ultra-thin prepreg and its preparation, achieves the effects of low production cost, good mechanical properties, and good appearance quality

Active Publication Date: 2021-04-02
BEIJING ONLYTOP HIGH TECH MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems described above

Method used

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  • A kind of ultra-thin prepreg and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] 1S fiber layer preparation: fix 25 spindles of carbon fiber bobbins with the brand name T700SC-12K on the creel, and the tow passes through the yarn unwinding device, yarn spreading device, drying device and winding device in turn, and finally the 25 spindles of tow The fiber filament stretching width is a fiber layer with a width of 500mm, wherein the fiber layer preparation speed is 5m / min;

[0071] 2S resin layer preparation: After heating and melting the epoxy resin, use a glue applicator to evenly coat the gel-like resin on the release paper to obtain a resin layer. The coating temperature is controlled at 70°C and the coating rate is controlled 10m / min;

[0072] Preparation of 3S ultra-thin prepreg: Take two sets of resin layers prepared in step 2S and place them on the upper and lower layers of the fiber layer, pass them through the gap of the heating roller press device, and soak the two layers of resin layers into the fiber layer to obtain an ultra-thin prepreg...

Embodiment 2

[0075] 1S fiber layer preparation: 19 spindles of carbon fiber bobbins with the brand name T700SC-12K are fixed on the creel, and the tow passes through the yarn unwinding device, yarn spreading device, drying device and winding device in sequence. Among them, the yarn unwinding tension of the bobbin It is 8N, and finally the fiber filaments contained in the 19 spindle tows are combined into a fiber layer with a width of 500mm, and the fiber layer is laid on kraft paper for winding;

[0076] In addition, in the ultrasonic spreading device, the frequency of the ultrasonic generator is 100MHz, the medium in the ultrasonic tank is industrial-grade pure water, the unwinding tension of the kraft paper is 30N, the winding tension of the fiber layer is 130N, and the fiber layer preparation speed is 6m / min ;

[0077] 2S resin layer preparation: After heating and melting the epoxy resin, use a glue applicator to evenly coat the gel-like resin on the release paper to obtain a resin laye...

Embodiment 3

[0082] 1S fiber layer preparation: fix 14 spindles of carbon fiber bobbin T700SC-12K on the creel, and the tow passes through the yarn unwinding device, yarn spreading device, drying device and winding device in sequence, among which, the yarn unwinding tension of the bobbin It is 15N, and finally the fiber filaments contained in the 14 spindle tows are combined into a fiber layer with a width of 500mm, and the fiber layer is laid on kraft paper for winding;

[0083] In addition, in the ultrasonic spreading device, the frequency of the ultrasonic generator is 100MHz, the medium in the ultrasonic tank is industrial-grade pure water, the unwinding tension of the kraft paper is 30N, the winding tension of the fiber layer is 150N, and the fiber layer preparation speed is 7m / min ;

[0084] 2S resin layer preparation: After heating and melting the epoxy resin, use a glue applicator to evenly coat the gel-like resin on the release paper to prepare a resin layer. The coating temperatu...

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Abstract

The invention provides a preparation method of ultrathin prepreg. The preparation method of the ultrathin prepreg comprises the steps of preparation of a fiber layer, preparation of a resin layer, preparation of the ultrathin prepreg and the like. According to the preparation method of the ultrathin prepreg, technological control of each step is researched, and the high-quality large-size ultrathin prepreg can be prepared; and in addition, the prepared prepreg has the advantages of being good in appearance quality, excellent in performance, low in production cost and the like. The invention further provides the ultrathin prepreg prepared through the preparation method. Composite laminate made of the ultrathin prepreg is excellent in mechanical property.

Description

technical field [0001] The invention relates to the field of prepregs, in particular to an ultra-thin prepreg and a preparation method thereof. Background technique [0002] Laminated composite materials are one of the most widely used composite material structures. The preparation method of laminated composite materials is usually to prepare unidirectional or fabric fiber prepregs first, and then prepreg the prepregs according to a certain layup method and layup angle. The impregnated materials are stacked to form a laminated composite material. The performance of laminated composite materials and their structures can be changed through the layup method and layup angle design, but the thickness of conventional fiber prepregs is usually 0.125 ~ 0.25mm, when designing some composite structures, especially thin-walled composites When the material structure is used, the number of layers allowed to be used is limited, which greatly reduces its design space, and it is difficult ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/50
CPCB29C70/504
Inventor 梁乐家王金厚杨薇薇
Owner BEIJING ONLYTOP HIGH TECH MATERIALS
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