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Method for testing damp-heat aging performance of coated fabric

A coating fabric, damp heat aging technology, applied in the direction of applying stable tension/pressure to test material strength, measuring device, strength characteristics, etc., can solve the problems of high risk, poor operability, high cost, etc., and achieve high degree of simulation, The effect of strong designability and strong data reproducibility

Active Publication Date: 2021-01-29
AEROSPACE LIFE SUPPORT IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, the aging test of coated fabrics is usually carried out in accordance with the requirements of GJB150 / 150A-2009 to carry out environmental adaptability tests such as high temperature or humidity with the finished product, or to carry out in the field with the service product The assessment of calendar time has a long period, poor intuition of data, high cost, high risk, and poor operability; while the hot air accelerated aging test involves the influence of high temperature factors, which is different from the high temperature, high humidity, The model of multi-factor interaction such as water immersion does not match

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method for testing damp-heat aging performance of coated fabric
  • Method for testing damp-heat aging performance of coated fabric
  • Method for testing damp-heat aging performance of coated fabric

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] 1) Preparation of material bulk samples

[0031] Prepare according to the test requirements of different characteristic values, and the specific sample preparation is as follows:

[0032] a) Fracture strength test piece

[0033] Make samples with a length of 350 mm and a width of 50 mm according to the warp or weft direction.

[0034] b) Interlayer adhesion test sample

[0035] Make the sample into a sample with a length of 200mm and a width of 50mm. Separate the coated surface from the base fabric at one end of the sample. For the sample that cannot be separated, stretch it on a tensile testing machine until it breaks, and then remove the sample. Then peel off.

[0036] 2) Preparation of seam samples

[0037] a) Heat seal peel strength test sample

[0038] The sealing strips with a length of 100mm are bonded to the coated fabric in a hot air-tight manner. The bonding method can be arranged in parallel and the distance between adjacent sealing strips is 50mm, or co...

Embodiment 1

[0053] Provide a method for testing the moisture-heat aging performance of waterproof and moisture-permeable cloth, which includes firstly preparing a standard sample, soaking it in hot water at 80°C, and then taking it out according to the predetermined soaking time to test the interlayer peeling force of the sample. The rate of change in the degree of decline in the peeling force between layers of the moisture-permeable fabric is used to evaluate the hot water aging resistance of the waterproof and moisture-permeable fabric.

[0054] The waterproof and moisture-permeable fabric is used as the main material of the surface of the pilot's sea life-saving clothing. Before the service life is reached, there are frequent faults such as layering and water leakage of the waterproof fabric, which needs to be improved urgently. In 2019, the hot water aging test and evaluation of the waterproof and moisture-permeable fabrics before and after the improvement were passed, and the effect w...

Embodiment 2

[0058] Provide a method for testing the damp heat aging performance of polyurethane tape, including firstly preparing a standard sample, soaking it in hot water, and then taking it out according to the predetermined soaking time to test the breaking strength, heat-sealing peel strength, and heat-sealing seam peel strength The hot water aging resistance of polyurethane tape is evaluated by judging the rate of change of the breaking strength of polyurethane tape, heat-sealing peel strength, and heat-sealing peel strength. The specific test results are shown in Table 2-4.

[0059] Table 2 Polyurethane tape breaking strength test results

[0060]

[0061] Table 3 Test results of heat-sealing peel strength of polyurethane tape

[0062]

[0063] Table 4 Test results of peel strength of heat-sealing joints of polyurethane adhesive tape

[0064]

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Abstract

The invention discloses a method for testing the damp-heat aging performance of a coated fabric, which comprises the following steps of: testing the hot-water aging performance of the coated fabric bytaking hot water as a test medium and taking breaking strength, interlayer stripping force or joint strength as test characteristic values, and evaluating the aging performance of the coated fabric under damp-heat conditions. The limitation of a single factor of an existing aging test method is broken through, the influence of interaction of multiple factors such as high temperature, high humidity and water media is integrated, the simulation degree is high, and the data reproducibility is high; the sample designability is high, the aging performance of the material body can be tested, and the joint manufacturability can be tested and assessed; and the restriction that real and effective data cannot be obtained due to the fact that the heat sealing strength is larger than the breaking strength of a material body is broken through, a heat sealing joint stripping strength test scheme is designed, and the manufacturability and aging resistance of a heat sealing joint part are equivalently assessed.

Description

technical field [0001] The invention relates to the technical field of a coated fabric environmental adaptability test, in particular to a test method for the damp heat aging performance of a coated fabric. Background technique [0002] Due to my country's vast territory and complex climatic conditions, equipment products such as life-saving clothing, lifeboats, and airborne airdrop parachutes in the military field that use coated fabrics as the main body not only have complex working conditions, but also have harsh environments. Sensitivity, humidity and heat are the main factors leading to the aging of the coated fabric of the main body of the product. In addition, the service life of military equipment is at least 5 years. Long-term exposure to the interaction of humid and hot environments will inevitably cause the decline in the appearance and performance of the coated fabric, resulting in over-service products. Therefore, it is necessary to carry out the test and life eva...

Claims

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Application Information

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IPC IPC(8): G01N17/00G01N3/18
CPCG01N17/002G01N3/18G01N2203/0017G01N2203/0226G01N2203/0282
Inventor 张荣张华陈华琦马振宁
Owner AEROSPACE LIFE SUPPORT IND LTD
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