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Prepreg fiber cloth and preparation method thereof

A technology of fiber cloth and glass fiber cloth, which is applied in the field of prepreg fiber cloth and its preparation, can solve problems such as insufficient interlayer bonding force, and achieve the effect of excellent interlayer bonding force

Active Publication Date: 2017-02-15
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, pre-impregnated fiber cloth usually uses pre-preg to pre-impregnate the fiber cloth. The pre-preg used in the prior art usually contains unsaturated polyester resin, vinyl resin, phenproxazine resin, phenolic resin, Urea resin, epoxy resin or melamine resin, etc. are used as the main components. When the prepreg fiber cloth obtained by pre-impregnating the prepreg is hot-pressed into a composite board by alternate lamination, the interlayer bonding force is insufficient.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Prepreg fiber cloth and preparation method thereof
  • Prepreg fiber cloth and preparation method thereof

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preparation example Construction

[0050] The present invention also provides a method for preparing prepreg fiber cloth, wherein the method is: in the presence of a magnetic field, impregnating a resin composition containing a thermosetting binder resin and magnetic chopped fibers into the fiber cloth , followed by heat curing.

[0051] In the preparation method of the prepreg fiber cloth of the present invention, since the impregnation of the resin composition is carried out in the presence of a magnetic field, the magnetic chopped fibers contained in the resin composition are all arranged in the same direction under the action of the magnetic field, In addition, since the cross-sectional diameter is small, it is easily inserted into the fiber cloth, so that in the obtained prepreg fiber cloth, the magnetic chopped fibers can have the first part inserted in the fiber cloth and fixed to the fiber cloth. The state of the second part exists in the resin bonding layer. In addition, the alignment direction of the...

Embodiment 1

[0083] 1) Prepare the pretreatment agent according to the ratio (mass ratio) of silane coupling agent: dispersant: ethanol = 1:3:100;

[0084] 2) Spray pretreatment agent on the surface of 4Kg magnetic chopped fiber (magnetic glass chopped fiber EMG-200, length is 200 μm, cross-sectional diameter is 10 μm), and dry to obtain pretreated fiber filament X;

[0085] 3) Weigh 48Kg of epoxy resin and 25Kg of reactive diluent, and disperse with a high-speed disperser (purchased from Shanghai Farfly Energy Co., Ltd., the same below) to obtain mixture A;

[0086] 4) Add the pretreated fiber filament X obtained in step 2) into mixture A, and disperse with a high-speed disperser to obtain mixture B;

[0087] 5) Weigh 15Kg of dicyandiamide (curing agent), 5Kg of 1-methylimidazole (curing accelerator), and 3Kg of defoamer, add them to mixture B, disperse with a high-speed disperser to obtain prepreg, and add fiber prepreg Dip tank;

[0088] 6) Place a magnet on the upper and lower ends o...

Embodiment 2

[0092] 1) Prepare the pretreatment agent according to the ratio (mass ratio) of silane coupling agent: dispersant: ethanol = 1:3:100;

[0093] 2) Spray a pretreatment agent on the surface of 8Kg magnetic chopped fibers (magnetic carbon chopped fibers DCMG-300, the length is 50 μm, and the cross-sectional diameter is 7 μm), and dry to obtain the pretreated fiber filament X;

[0094] 3) Take by weighing 75Kg of epoxy resin and 10Kg of reactive diluent, and disperse with a high-speed disperser to obtain mixture A;

[0095] 4) Add the pretreated fiber filament X obtained in step 2) into mixture A, and disperse with a high-speed disperser to obtain mixture B;

[0096] 5) Weigh 5Kg of dicyandiamide (curing agent), 0.7Kg of 1-methylimidazole (curing accelerator), and 1.3Kg of defoamer, add them to the mixture B, disperse with a high-speed disperser to obtain a prepreg, and add In the fiber prepreg tank;

[0097] 6) Place a magnet on the upper and lower ends of the fiber prepreg tan...

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Abstract

The present invention relates to the field of prepreg fiber cloths, and discloses a prepreg fiber cloth and a preparation method thereof. According to the present invention, at least partial surface of the prepreg fiber cloth is wrapped with a resin adhesion layer, and the prepreg fiber cloth is characterized in that magnetic chopped fibers are arranged between the resin adhesion layer and the fiber cloth and the included angle between the magnetic chopped fibers and the fiber cloth is more than 0 DEG; and the prepreg fiber cloth has excellent interlayer bonding force when the prepreg fiber cloth is subjected to hot pressing into the composite plate.

Description

technical field [0001] The invention relates to a prepreg fiber cloth and a preparation method thereof. Background technique [0002] At present, pre-impregnated fiber cloth usually uses pre-preg to pre-impregnate the fiber cloth. The pre-preg used in the prior art usually contains unsaturated polyester resin, vinyl resin, phenproxazine resin, phenolic resin, Urea resin, epoxy resin or melamine resin is used as the main component, and the interlayer bonding force of the prepreg fiber cloth obtained by pre-impregnating the prepreg is insufficient when it is hot-pressed into a composite board by alternate lamination. Contents of the invention [0003] The object of the present invention is to provide a pre-impregnated fiber cloth and its preparation method. The pre-impregnated fiber cloth has excellent interlayer bonding force when it is hot-pressed into a composite board. [0004] The inventors of the present invention unexpectedly found that when a resin composition conta...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24C08L63/00C08K9/06C08K7/14C08K7/06
Inventor 崔静娜毛定文黄小萍罗文海
Owner BYD CO LTD
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