Method for enhancing permeability of prepregs

A technology of prepreg and impregnation, which is applied in the processing of textile materials, liquid/gas/steam textile material processing, textiles and papermaking, etc. It can solve the problems of poor impregnation of prepregs and achieve good impregnation

Inactive Publication Date: 2011-04-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem of poor penetrability of the prepreg processed by the existing method, thereby providing a method for improving the penetrability of the prepreg

Method used

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  • Method for enhancing permeability of prepregs
  • Method for enhancing permeability of prepregs
  • Method for enhancing permeability of prepregs

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0015] Specific implementation mode 1. Combination figure 1 Illustrate this specific embodiment, a kind of method that improves prepreg wettability, it is realized by the following steps:

[0016] Step 1. Pretreat the reinforcement material 1 to be processed to obtain the pretreated reinforcement material;

[0017] Step 2. Send the pretreated reinforcing material obtained after step 1 into the dipping tank 2, and use two pressure rollers 3 to impregnate the pretreated reinforcing material in the glue solution in the dipping tank 2. , to obtain the reinforced material after the first dipping;

[0018] Step 3, using the rubber-extruding roller 4 to squeeze the reinforced material obtained in step 2 above the rubber surface in the dipping tank 2 to obtain the reinforced material after the rubber-squeezed;

[0019] Step 4, the reinforced material obtained in step 3 after being extruded is dipped again in the glue solution in the dipping tank with a rubber roller 3 to obtain the ...

specific Embodiment approach 2

[0025] Embodiment 2. The difference between this embodiment and the method for improving the permeability of prepreg described in Embodiment 1 is that in step 5, the extruded reinforcing material is sent into the interior from the dipping tank 2 The prepreg 5 was obtained after pre-curing in a curing oven at a temperature of 110°C.

specific Embodiment approach 3

[0026] Specific embodiment three, in conjunction with concrete parameter, verify the effect of the present invention method: select one volume (wide 1 meter, long 100 meters) of the glass cloth of weaving for use under the traction of motor, send into interior with the speed of 0.6 meter per minute Heat treatment in a heat treatment furnace at a temperature of 150°C, remove surface impurities (dust removal) and then enter the dipping tank, set two pressure rollers near the bottom of the dipping tank to impregnate the glass cloth, and then pass through the dipping tank Squeeze the glue roller on the top of the rubber surface to remove excess glue, then return to the glue in the dipping tank to dip again, and then squeeze the glue again and send it to a curing furnace with an internal temperature of 100°C to pre-cure the resin in the glass cloth , and then rolled to make a prepreg. During the dipping process, the purpose of adding a group of extrusion rollers above the dipping t...

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Abstract

The invention relates to a method for enhancing the permeability of prepregs, relating to a method for enhancing the permeability of the prepregs and solving the problems of poorer permeability of the prepregs processed by the traditional method. The method comprises the following steps of: preprocessing reinforcing materials to be processed, then delivering into a gum dipping tank, and carrying out gum dipping on the preprocessed reinforcing materials by adopting two dandy rolls in a gum solution inside the gum dipping tank; then carrying out gum extrusion above the gum surface of the gum dipping tank by adopting a gum extruding roll; then carrying out the gum dipping again in the gum solution inside the gum dipping tank by adopting one dandy roll, carrying out the gum extrusion again, and then delivering into a curing oven with the internal temperature of 100-120 DEG C for precuring so as to obtain the prepregs. The invention is suitable for the dipping of glass cloths or carbon cloths.

Description

technical field [0001] The present invention relates to a method of increasing the wettability of prepregs. Background technique [0002] Prepreg is a composition made of resin matrix and reinforcement, and is an intermediate material for making composite materials. The performance of the composite depends largely on the quality of the prepreg. At present, prepreg has been widely used in the fields of aerospace, energy, automobile and sports, so the research on prepreg is of great significance. [0003] The wettability during prepreg processing is an important evaluation index of prepreg. The amount of glue impregnated with fibers or fabrics is small, the impregnation inside the prepreg is uneven, and the quality of the prepreg product is light, which will lead to unqualified products in the subsequent manufacturing process and cannot meet the needs of continuous production. At present, for 3K carbon cloth or densely woven glass cloth, some existing processes and methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06B3/18D06B15/02D06B7/00
Inventor 姜波黄玉东刘丽
Owner HARBIN INST OF TECH
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