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Method for testing compression watertight performance of foam

A water-tight and high-performance technology, used in measurement devices, suspension and porous material analysis, scientific instruments, etc., can solve the problem that it cannot be close to the working conditions of vehicles, the water-tight performance check standard is loose, and it cannot match the foam water-tight performance check standard. and other problems, to achieve the effect of reducing the probability of changes and after-sales problems, strong durability and performance discrimination, and good matching.

Pending Publication Date: 2022-04-29
SAIC GENERAL MOTORS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from the test content stipulated in the existing material level performance test method (refer to GMW 17408Aug2017, GMW 17650 Oct2016), the watertight performance check standard for material level is too loose, and cannot match the watertight performance of foam in specific parts applications Calibration standards (refer to GMW14906 Jan2018 4.5.4&4.9.3.7), it is necessary to develop a test method that is more in line with the part application and better matches the part detection standard
[0003] The traditional foam watertight performance test method can only test the material-level watertight properties of the foam under non-durable conditions, and cannot be close to the vehicle conditions

Method used

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  • Method for testing compression watertight performance of foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] use as figure 1 The shown watertight performance test tool follows the steps below to test the watertight performance of foam compression:

[0085] (1) Take the foam sample, first install the foam sample on the watertight performance test tool for compression, the compression amount is 50%, and then store the foam sample installed on the watertight performance test tool at high temperature in the compressed state treatment, salt spray durability treatment and high and low temperature shock cycle treatment, and cycled 3 times; among them,

[0086] In the high-temperature storage process, it is stored in an environment of 70 ° C for 72 hours;

[0087] In the salt spray durable treatment, it is stored for 24 hours according to the method of GMW 3286;

[0088] In the high and low temperature shock cycle treatment, first store at 40°C for 7 hours, then store at 38°C and 95% humidity for 17 hours, then store at 70°C for 7 hours, and then store at 38°C and 95% humidity Stor...

Embodiment 2

[0102] The difference with embodiment 1 is only: in step (1),

[0103] In the high-temperature storage process, it is stored in an environment of 80 ° C for 76 hours;

[0104] In the salt spray durable treatment, it is stored for 26 hours according to the method of GMW 3286;

[0105] In the high and low temperature shock cycle treatment, first store at 30°C for 10 hours, then store at 30°C and 97% humidity for 19 hours, then store at 60°C for 10 hours, and then store at 35°C and 99% humidity Stored for 36 hours, a total of 75 hours;

[0106] The total duration of three cycles of high temperature storage treatment, salt spray durability treatment and high and low temperature shock cycle treatment is 531h.

Embodiment 3

[0108] The difference with embodiment 1 is only: in step (2),

[0109] The test position of the foam sample is located at 10cm underwater;

[0110] The inflated CO is 4Kpa, and the inflation time lasts 45s.

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Abstract

The invention discloses a method for testing the compression watertight performance of foam. The method comprises the following steps: (1) compressing a foam sample, and sequentially carrying out high-temperature storage treatment, salt mist durability treatment and high-low temperature impact circulation treatment; and (2) testing the compression watertight performance of the foam sample treated in the step (1). According to the method for testing the compression watertight performance of the foam, evaluation on the compression watertight performance of the foam in the two dimensions of durability and time is provided, and compared with evaluation on the compression watertight performance only aiming at brand new foam materials, the method has higher durability quality discrimination capability and can be used for reference of application occasions with requirements for durability application.

Description

technical field [0001] The invention belongs to the field of testing foam compression watertight performance, in particular to a method for testing foam compression watertight performance. Background technique [0002] The requirements for watertight performance in the development of auto parts have different requirements in various sub-system fields. For the application of exterior lighting with closed-cell flexible expansion rubber or rubber-like materials for sealing, in addition to ensuring that the sealing material meets the performance requirements of the material level, still Compressive watertightness at the component level should be considered. Judging from the test content stipulated in the existing material level performance test method (refer to GMW 17408Aug2017, GMW 17650 Oct2016), the watertight performance check standard for material level is too loose, and cannot match the watertight performance of foam in specific parts applications For the calibration stan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 王颖黄汉云雷周激欣史天泽
Owner SAIC GENERAL MOTORS
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