On-line fast detection method for impregnation degree of resin in fiber cloth

A detection method and fiber cloth technology, which can be used in measuring devices, textile testing, material inspection products, etc., can solve the problems of inability, rapid detection, time-consuming and labor-intensive detection, etc., and achieve the effect of saving time, cost, and convenient production.

Active Publication Date: 2009-04-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of time-consuming and labor-intensive detection of the degree of resin impregnation in the fiber cloth during the processing of prepregs and the inability to perform rapid on-site detection, thereby providing an online rapid detection method for the degree of resin impregnation in the fiber cloth

Method used

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  • On-line fast detection method for impregnation degree of resin in fiber cloth
  • On-line fast detection method for impregnation degree of resin in fiber cloth
  • On-line fast detection method for impregnation degree of resin in fiber cloth

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specific Embodiment approach 1

[0008] Specific implementation mode one: an online rapid detection method for the degree of impregnation of resin in fiber cloth. Multiple prepreg samples impregnated; Second, use a scanning electron microscope to observe the impregnation depth of the resin in the fiber cloth in each prepreg sample, and obtain each prepreg sample according to the impregnation depth of the resin in the fiber cloth The degree of impregnation of the resin in the fiber cloth; third, use the near-infrared diffuse reflectance spectrometer to collect multiple times the same area of ​​each prepreg sample in step two, obtain multiple spectral information of each prepreg sample, and compare the obtained Multiple spectral information for optimization; Fourth, establish a prepreg sample database, the prepreg sample database includes the degree of impregnation of each prepreg sample and its corresponding spectral information; Fifth, select from the sample database Representative prepreg samples, establish ...

specific Embodiment approach 2

[0030] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the method of obtaining the degree of impregnation of the resin in the fiber cloth according to the impregnation depth of the resin in the fiber cloth in step 2 is: by the formula:

[0031] I%=(h 1 -h)×h -1 ×100%

[0032] Obtain the impregnation degree I% of resin in fiber cloth, h represents the impregnation degree of optimum impregnation in the formula, h 1 Indicates the actual impregnation depth of the prepreg sample.

[0033] If I%>0, it means that the amount of prepreg impregnated glue is large, and there is excess glue on the upper and lower surfaces, and the degree of impregnation of the prepreg is over-impregnated; if I%=0, it means that the resin is completely impregnated to In the fiber, and there is no excess glue on the upper and lower surfaces, the impregnation degree of the prepreg is the best impregnation at this time; if I%<0, it means that the amount of glue impregnated in ...

specific Embodiment approach 3

[0034] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the selection of representative samples in Step 5 is based on the accumulation of sample spectra and the properties of sample spectra.

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Abstract

The invention discloses an on-line quick detection method used for detecting the dipping degree of resin into fiber cloth relates to the detection method for detecting the dipping degree of resin into fiber cloth. The invention solves the problems that the detection to the dipping degree of resin into fiber cloth costs both time and labor during the processing of pre-dipping materials and the quick detection cannot be realized. The method is as follows: 1. a plurality of pre-dipping material samples with the dipping degree of insufficient dipping, excellent dipping and over dipping are selected respectively; 2. the dipping degree of each pre-dipping material sample is calculated; 3. a near-infrared diffuse reflection spectrometer is adopted to collect the same zone on each pre-dipping material sample to obtain a plurality of spectrum information of each pre-dipping material sample; 4. the pre-dipping material sample database is established; 5. correction sample collections are established; 6. the quantitative analysis model for the resin against the fiber cloth is established and the model is optimized to get the optimal correction model; and 7. the optimal correction model is adopted to predict the dipping degree of the resin into the fiber cloth. The invention is suitable for the detection to the dipping degree of different reinforced fibers and resins.

Description

technical field [0001] The invention relates to a method for detecting the impregnation degree of resin in fiber cloth. Background technique [0002] Prepreg, also known as molding compound, is a composition of resin matrix and reinforcement made by impregnating continuous fibers with resin under strictly controlled conditions, and is an intermediate material for manufacturing composite materials. The performance of the composite depends largely on the performance of the prepreg. Therefore, the study of prepreg is of great significance to the application and development of composite materials. [0003] The impregnation degree of resin in fiber cloth during prepreg processing is an important evaluation index of prepreg. If the impregnation is uneven, the resin distribution in the product will be uneven during the subsequent preparation of the finished product, which cannot meet the needs of production; therefore, it is very important to detect the degree of impregnation of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/04G01N21/49G01N33/36
Inventor 黄玉东姜波刘丽孟令辉
Owner HARBIN INST OF TECH
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