The difference analysis of foaming sponge moisture resistance was tested respectively by weight gain method and weight reduction method.
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Last Update: 2020-07-17
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Source: Internet
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Author: User
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Abstract: The cup method for testing the water vapor passrate of materials includes two experimental methods: weight gain and weight reductionthis paper uses these two methods to test the water vapor transmission rate of a closed-hole foam sponge sample, and compares the test principle, test process and test results of the two methods, introduces the parameters and scope of application of the equipment, and provides reference for the moisture-proof properties of the water-proof materials by cup methodkey words: cup method, weighing method, weight gain method, weight reduction method, water vapor pass rate test system, moisture resistance performance, closed-hole foam sponge 1, meaning water vapor pass rate is an important reference index to measure the moisture resistance of materials, the water vapor pass rate test and research is an important link in material applicationthe principle ofcup formula is one of the important principles of water vapor pass-through testofofofofof, which is also known as the weighing principle, and calculates the water vapor passthrough rate of the material according to the change of the quality of the permeable cupcup method also includes two experimental methods, weight gain method and weight reduction method, and this paper makes a comprehensive comparison of the two methods through targeted testsclosed hole foam sponge is a kind of foamsponge, its interior is independent of each other bubble hole, that is, bubble hole and bubble hole between the wall membrane separation, not connected to each other, this completely separated independent bubble structure and the material's own hydrophobic properties, can effectively prevent water gas penetration, has a certain moisture resistance, is the ideal sealing materialthis paper, the water vapor transmission rate of the closed-hole foaming sponge is tested separately using the above two methods2, test sample SThis paper to a closed-hole foam sponge as a test sample3, the test according to the test process according to GB 1037-1988 "plastic film and sheet permeable vapor test method cup method."4, test equipment The test equipment used in this test is C360M water vapor transmission test system for the test equipment, the equipment by Jinan Lan optical mechanical and electrical technology Co., Ltdindependent research and development and productionC360M water vapor pass-through test system 4.1 test principle Weight gain method test principle is based on the penetration into the permeable cup water vapor quality calculation of the water vapor of the material, that is, the permeable cup into a certain amount of desiccant, used to absorb the water vapor permeable into the permeable cup, sample seal In the permeable cup mouth, the permeable cup internal and external environment separated, the external environment control for high-humidity environment, water vapor from the external environment through the sample penetration into the permeable cup, causing the quality of the permeable cup increase, through the test of the total amount of permeable cup with the penetration time increase, to get the sample water vapor pass rateThe test principle ofweight reduction is to calculate the water vapor passthrough rate of the material based on the outward penetration of water vapor in the permeable cup causing a reduction in the mass of the permeable cupcompared with the weight gain method, the weight reduction method is loaded into a certain amount of distilled water, the formation of a high humidity environment, the external environment of the permeable cup control for low-humidity environment, in order to achieve the penetration of water vapor, according to the wetting cup quality with the reduction of penetration time to obtain the water vapor transmission rate of the material 4.2 Equipment parameters Support weight gain method, weight reduction method two experimental methods, weight gain method test range of 0.01 to 1200 g / (m2.24h), weight reduction method of 0.01 to 10,0 000 g/ (m2,24h); 6 specimens can be tested in one test to improve test efficiency; cabin space stereoscopic temperature, temperature control range (15 to 55) s.2 degrees C; equipped with high-efficiency water-free mist humidity automatic adjustment Device, moisture control range of (10 to 90) % , gas drying device does not need to replace the inner core, continuous operating life of up to 20,000 hours; The test chamber and permeable cup are designed by the structural analysis, the temperature and humidity are more uniform and stable, the test cycle is shorter, the results are more accurate, the unique DataShieldTM data shield system, the management requirements of the docking user data set, supports the export of a variety of data formats, and uses reliable security algorithms to prevent data leakage Support for universal wired and wireless local area network, optional dedicated wireless network, support access to third-party software 4.3 Application Range (1) This equipment is suitable for the testing of water vapor transmission rates of packaging materials and products such as film, sheet, paper and cardboard, textiles and non-textile scouring materials and products , the film category includes a variety of plastic film, paper-plastic composite film, geomembrane, co-extruding film, waterproof breathable film, aluminum coating, aluminum foil, aluminum-plastic composite film and other film-like materials; can be expanded for use in building materials, sterile protective film, medical paste and other materials water vapor pass rate testing (2) this equipment meets a number of national and international standards, such as GB 1037, GB/T 16928, YBB00092003, ISO 2528, ASTM E96, ASTM D1653, TAPPI T464, DIN 53122-1, etc 5, the test process from the sample surface to cut 6 pieces of diameter of 100 mm of specimens, the two methods each test 3 tablets 5.1 weight gain method (1) to 3 permeable cups to add a certain amount of desiccant, the specimen is placed in the permeable cup, inserted into the mask, along the shield into the seal with wax to seal the specimen the test sample is sealed, place the wetting cup in the wetting cup holder of the equipment and close the test door (2) set the test sample name, test temperature, humidity, test method (weight gain method), test mode and other parameter information in the control software of the device, click on the test option, and the test begins the equipment to carry out the test according to the set parameters, and after the test is displayed the test results 5.2 Weight Reduction Method Adds a certain amount of distilled water to the permeable cup, and the rest of the operation is the same as the weight gain method, in which the test method selects the weight reduction method 6, test results take the arithmetic average of the 3 sample test results of each test method as the test results of the sample the water vapor pass rate of 2.8064 g/(m2.24h) of the sample tested by the weight-loss method and 3.3916 g/(m2.24h) of the sample tested by the weight loss method 7, Conclusion From the test principle of weight gain method and weight reduction method and test operation, the two are different in terms of reagents placed in the permeable cup, humidity of the external environment, the direction of water vapor penetration, etc.; the test equipment used in this paper can be used for the accurate test of two test methods, and the accuracy of the test results is high Jinan Lan optical mechanical and electrical technology Co , Ltd is a professional packaging testing equipment research and development and production and packaging testing services of high-tech (separator) technology enterprises, the new C-series barrier detection equipment, the use of independent sensor technology, in the test accuracy, efficiency and automation of revolutionary upgrades, to achieve the packaging barrier equipment shock metamorphosis to understand the relevant equipment information, can visit Jinan Languang company station to view specific information or call for advice The more understand, the more trust! Labthink Languang looks forward to enhancing technical communication and cooperation with enterprises and institutions in the industry .
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