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A test method for prepreg resin impregnation degree

A test method and prepreg technology, applied in the field of composite materials, can solve the problems of high sampling requirements, lack of scientific standards, discrete data, etc., and achieve the effect of easy operation

Active Publication Date: 2018-11-16
HENGSHEN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of judging the degree of resin infiltration in some prepregs at home and abroad is mainly to observe the depth of resin infiltration in the thickness direction of the prepreg through scanning electron microscopy. This method has high sampling requirements, and the resin infiltration in the image can only be judged with the naked eye. Depth, the lack of scientific standards, the resulting data is too discrete to be used as an accurate test standard for the degree of resin infiltration

Method used

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  • A test method for prepreg resin impregnation degree
  • A test method for prepreg resin impregnation degree

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] like figure 1 , figure 2 As shown, a partially impregnated prepreg resin impregnation test method, including:

[0024] 1. Sampling of fabric matrix and prepreg matrix: samples are taken from both sides (OS, DS) and middle (M) of the full width prepreg and fabric respectively. Dipping matrix, the size of the matrix is ​​100.0mm×100.0mm,

[0025] 2. Sampling of fabric samples and prepreg samples: Cut 2 fabric samples on the fabric matrix of each group, and cut 2 prepreg samples on the prepreg matrix of each group, namely 6 fabric samples, 6 prepreg samples, a total of 12 samples, the size of the test sample is 10.0mm×30.0mm;

[0026] 3. Use pressure-sensitive tape to stick on the bottom of all test samples. Both sides must be pasted with pressure-sensitive tape to ensure that the bottom of the test sample is not completely soaked when in contact wit...

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Abstract

The invention provides a test method for prepreg resin infiltration degree. The method is mainly for testing the impregnation degree of a vacuum bag molded oven cured prepreg. The method utilizes the capillary water absorption phenomenon occurred during contact of dry fiber and water, and water rises along the capillary between fiber bundles and infiltrates the fiber till reaching a saturated water absorption capacity. The resin infiltrated interfibre capillary channel is closed, capillary action cannot occur to absorb water, so that the water absorption capacity can be utilized to judge the content of dry fiber in the impregnated prepreg, thus testing the impregnation degree of the prepreg.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a method for testing the degree of resin infiltration during the preparation of carbon fiber prepregs. Background technique [0002] Compared with the traditional autoclave prepreg process, the prepreg vacuum bag curing process can get rid of the limitation of the size of the autoclave of the molding equipment and the high cost of use. The internal and surface quality of the prepreg vacuum bag pressure curing part depends not only on the resin formula and resin mixing process, but also is closely related to the degree of infiltration of the resin on the fiber during the prepreg manufacturing process. At present, the method of judging the degree of resin infiltration in some prepregs at home and abroad is mainly to observe the depth of resin infiltration in the thickness direction of the prepreg through scanning electron microscopy. This method has high sampling requirements, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/02
CPCG01N5/02
Inventor 孙杰徐辰陈琰升
Owner HENGSHEN
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