Testing Standards For The Textile Industry
May 14, 2020
Our company has the top technology and technical personnel in the domestic composite industry, specializing in solving difficult problems in the waterproof and breathable composite industry. Our company has a complete set of complete testing equipment and testing methods, currently commonly used are American Standard (ASTM), Japanese Standard (JIS), British Standard (BS), European Standard (ISO), National Standard (GB).
American standard ASTM E96 BW, this method has two versions, 1995 version and 2000 version, Gu said now there is a 2005 version, the restrictions in it have not changed much, only the wind speed of the thermostat is different; 3 meters per second, and the 2000 version has a wind speed of 0.2 meters per second; other temperatures are 23 degrees and humidity is 50%. The indicators of this version are generally 5000/5000, 3000/3000, 2000/2000.
Japanese standard JISL1092, JISL1099, JISL1092A method is the low water pressure method, 5000MM / H2O is the highest water pressure; JISL1092B is the high water pressure method, the highest measured is 20000MM / H2O; JISL1099A method is the positive cup method, which uses the calcium hydroxide to absorb moisture The method detects moisture permeability, which is similar to the result of ASTM E96 BW 1995 version method; JISL1099B method is a high moisture permeability method, which is an inverted cup method. Because the membrane is hydrophilic, the measured moisture permeability will be very high, up to 20000 G / M2 / DAY
British standard BS7209; EN31092, EN343 is water pressure, EN31092 is the specific standard in EN343, divided into three levels, one level, two levels, three levels; the highest is three levels, after five washings, it is converted into MM / H2O 1300; The method of expressing moisture permeability is 85% 65%. At present, China can only achieve 80%, which is approximately equal to our 20K / 20K, and our 10K / 10K is only 59%. This method is rarely used.
The European standard uses RET (ISO11092) for moisture permeability, and ISO811 for water pressure, which is also a low water pressure method. Our products can achieve 10000MM / H2O after five washings; RET is the wet resistance, the smaller the RET value, the greater the moisture permeability There are only a few types on the market today, RET ≤ 6, RET ≤ 13, RET ≤ 20, RET ≥ 40 ...
The moisture permeability is divided into the Ret value Chinese called wet steam resistance method and the Rct value Chinese called hot steam resistance method. The Ret value IS0 11092 was mainly used in the moisture permeability requirements of military clothing in the past, and now has entered the field of civilian clothing.
