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A method for testing the breaking strength of glass fiber products

A breaking strength and glass fiber technology, which is applied in the field of strength testing, can solve the problems of glass fiber filaments causing damage to the operator's respiratory system, cumbersome process, small sample size, etc., and achieve the effect of avoiding occupational health hazards and simple operation

Active Publication Date: 2018-05-08
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of this method: ① After the spinning method is used to prepare samples, it is very easy to cause fiber displacement or cloth strip damage during the glue coating process, resulting in inaccurate test data, and a large number of glass fiber filaments produced during the spinning process are harmful to the operator's respiratory system. Causes great damage ②In the process of gluing, the fiber bundles at the edge of the cloth strip made by spinning method are easy to fall off, resulting in the small size of the sample and inaccurate test data; ③The coating is used to increase the friction between the cloth strip and the fixture The adhesive with high resistance needs to be heated at high temperature, the process is cumbersome, and the high temperature will easily cause the toxic solvent inside the adhesive to volatilize, which will cause harm to the health of the operator

Method used

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  • A method for testing the breaking strength of glass fiber products
  • A method for testing the breaking strength of glass fiber products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: the test material of this example: select the glass fiber cloth that Tianjin glass fiber factory produces for use, brand: EW100, thickness: 0.1mm, single fiber nominal diameter 5.5 micron, equipment: U.S. INSTRON electronic tensile machine 3365, measuring range: 2KN, test Conditions: Temperature: 23°C Humidity: 65%.

[0020] The present invention comprises the steps:

[0021] (1) Flatten the non-alkali glass fiber cloth for the test, and cut 6 cloth strips of 40mm×280mm in the radial direction and the weft direction respectively at a distance of 50mm from the edge of the test cloth, such as figure 1 As shown, L=280mm, H=40mm;

[0022] (2) Prepare mixed adhesive: take 2-3 parts of polyimide adhesive and 1 part of dimethylamide, mix well, put it in a glass beaker for later use;

[0023] (3) Place the cloth strip sample cut in step (1) on the flat glass, smooth and straighten it, and brush the mixed glue prepared in step (2) on both ends of the cloth strip ...

Embodiment 2

[0027] Embodiment 2: The difference between this example and Embodiment 1 is: in this example:

[0028] (2) Preparation of mixed adhesive: take 2 parts of polyimide adhesive and 1 part of dimethylamide, mix them evenly, and put them in a glass beaker for later use;

[0029] (3) Place the cloth strip sample cut in step (1) on the flat glass, smooth and straighten it, brush the mixed glue prepared in step (2) on both ends of the cloth strip sample, and apply glue on one end The length is 90mm, and the other end is glued to a length of 110mm. Cover with a glass panel to make the fibers straight and perpendicular to each other to prevent fiber displacement or cloth strip damage. Curing at 60° for 2 hours, such as figure 2 shown.

Embodiment 3

[0030] Embodiment 3: the difference between this example and embodiment 1 is: in this example:

[0031] (2) Prepare mixed adhesive: take 3 parts of polyimide adhesive and 1 part of dimethylamide, mix them evenly, and put them in a glass beaker for later use;

[0032] (3) Place the cloth strip sample cut in step (1) on the flat glass, smooth and straighten it, brush the mixed glue prepared in step (2) on both ends of the cloth strip sample, and apply glue on one end The length is 90mm, and the other end is glued to a length of 110mm. Cover with a glass panel to make the fibers straight and perpendicular to each other to prevent fiber displacement or cloth strip damage. Curing at 70° for 1 hour, such as figure 2 shown.

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Abstract

The invention discloses a method for testing the breaking strength of glass fiber products, which belongs to the technical field of strength testing. Spread the non-alkali glass fiber cloth for the test, and cut 6 cloth strips of 40mmX280mm in the radial and weft directions at a distance of 50mm from the edge of the test cloth; take 2-3 parts of polyimide adhesive, 1 dimethylamide Place the cut cloth sample on the flat glass, smooth and straighten it, brush the prepared mixed glue on both ends of the cloth sample, cover the glass panel, make the fiber straight and Perpendicular to each other, curing at 60-70° for 1-2 hours; straighten the cured cloth strip sample, and cut it to a width of 25mm in the middle; put the cloth strip sample into the tensile machine fixture, and perform the breaking strength test. The invention does not need spinning when preparing the sample, and avoids the phenomenon that the fiber bundles at the edge of the cloth strip are easy to fall off, which causes the size of the sample to be too small and inaccurate test data.

Description

technical field [0001] The invention belongs to the technical field of strength testing, in particular to a method for testing the breaking strength of glass fiber products. It is a test for the breaking strength of non-alkali glass fiber cloth and non-alkali glass fiber tape. Background technique [0002] At present, there are two test methods for the breaking strength of glass fiber products: JC176-80 "Test method for glass fiber products" and GB7689.1-2001 "Determination of glass fiber tensile breaking strength and elongation at break". The actual operation of the latter sample preparation process is more difficult, and the test results are not ideal. The breaking strength of alkali-free glass products usually refers to the standard of the Ministry of Building Materials Industry: JC176-80 "Test Methods for Glass Fiber Products". It stipulates that the determination of the breaking strength of glass cloth should be carried out on a vertical lever testing machine, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N3/08
Inventor 张丽娜刘芳史艳梅南辉邢彬
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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