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Quantitative test method for tackiness of prepreg

A test method and prepreg technology, applied in the field of testing

Active Publication Date: 2021-06-01
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Among the composite material test methods at home and abroad, there are only qualitative (grading) test methods for prepreg viscosity, and no quantitative test methods and index systems for viscosity.

Method used

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  • Quantitative test method for tackiness of prepreg
  • Quantitative test method for tackiness of prepreg
  • Quantitative test method for tackiness of prepreg

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] Quantitative viscosity test of 3238A / CF3052 medium temperature curing epoxy prepreg

[0054] 1. Test Preparation

[0055] Take out the product 3238A / CF3052 medium temperature curing epoxy prepreg from the cold storage, and open the package after placing it at room temperature for at least 6 hours. Cut the prepreg sample, the size of the sample is 160mm×25mm, the width of the sample is accurate to ±0.1mm, and the length of the bonding surface is 50mm±0.5mm. The number of samples taken along the longitudinal direction of the sample is 5. Prepare a stainless steel plate (roughness Ra<1.6um), the size of the stainless steel is 160mm×25mm, and the quantity is 5 pieces.

[0056] 2. Test conditions (environment)

[0057] The sample needs to be adjusted and tested under the condition that the ambient temperature reaches 23°C±2°C and the relative humidity is not greater than 65%.

[0058] 3. Test procedure (test steps)

[0059] Before the test, lap the cut single-layer prep...

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Abstract

The invention belongs to the technical field of detection, and relates to a method for quantitatively testing the viscosity of one of the physical properties of prepreg, an intermediate product of molding composite materials, in particular to a method for quantitatively testing the viscosity of prepreg. Take samples of the same material as the tested product, the number of samples is not less than 5, the test environment temperature is 23°C±2°C, and the relative humidity is not more than 65%, and the tensile test machine is used for tensile and shear tests. The invention provides a test method for quantitatively characterizing the viscosity of a prepreg of a composite material. The viscosity of the prepreg can be better controlled through the test method, thereby improving the use process of the prepreg. The present invention completes the quantitative testing of the viscosity of the prepreg, the selection and optimization of the test parameters, and the formation of the quantitative testing method of the viscosity of the prepreg through a large number of experimental researches and demonstrations. Through the verification of the suitability of the prepreg laying process, the fixed value control of the prepreg viscosity is realized to improve the stability of the prepreg process.

Description

technical field [0001] The invention belongs to the technical field of detection, and relates to a method for quantitatively testing the viscosity of one of the physical properties of prepreg, an intermediate product of molding composite materials, in particular to a method for quantitatively testing the viscosity of prepreg. Background technique [0002] The laying process of prepreg is a key factor to determine whether the prepreg is suitable for manufacturing composite components, and the viscosity of the prepreg should be within an appropriate range. Viscosity is a basic physical property of prepregs used in resin matrix composites. However, both the theoretical understanding of viscosities and the establishment of viscosity quantitative test methods in practical applications to characterize the viscosities of prepregs are still in the early stages of research. . In the application of prepreg, there is still the situation that the viscosity of prepreg is not ideal, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/04G01N3/24
CPCG01N3/24G01N19/04
Inventor 王洁宇朱凯沈超
Owner AVIC COMPOSITES
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