Difference between GB and GB test methods

Textile physical indicators of the detection methods and assessment methods vary from country to country, general buyers will specify the standard test methods are: GB, is China's standard; ISO, applicable to European countries; AATCC and ASTM, applicable to the Americas; BS for use in the United Kingdom; AS for Australia and New Zealand; DIN for Germany; JIS for Japan; WS for most countries in the world, mainly wool; CAN for Canada. At present, our company often encountered customers require the use of American Standard testing methods are more.
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Here are some of the major test methods for comparison:
1, wash fastness
At present, we selected the American Standard Method A2 and GB method 2, the American standard temperature is lower than the national standard 1 ℃, the water is three times the national standard, the need for steel cup 1200ml, while the national standard is 550ml; Also different, the American standard is the use of 10 # multifiber cloth, the national standard is DW multifiber cloth; sample size is different, the American standard is 5 × 15cm, the national standard is only 4 × 10cm; the amount of detergent used and different, the United States Standard use of non-phosphorus detergent, GB with phosphorus; American Standard test plus 50 steel ball to rubbing, GB did not. That is: that the same piece of cloth, with two standard methods of detection will make different results, the American Standard will almost. So when the need to test must choose a good test, or confirm with the customer clear test standards.
2, rubbing fastness
On the equipment, the national standard is the motor automatically, the American standard is hand-shake, the result of the two methods of dry friction will not have much difference. The wet-rubbed GB requires water content of 100% and the American standard requires 65%. The result will be different.
3, perspiration fastness
GB and the United States in the operation basically the same, different formulations of sweat stains, the American standard than the national standard plus a more lactic acid composition, and only the detection of sweat acid; while the national standard contains sweat acid, in time is also different, Pressure required 6 hours, the national standard just pressure 4 hours, the test results will be almost American Standard GB worse.
4, formaldehyde content
GB commonly used water extraction method, extraction 1 hour; while the US standard 20-hour extraction with the vapor phase, the result will be much higher than the national standard, such as GB measured 60ppm, the US standard may be measured as 200 ppm.
5, PH value
GB is 40 ℃, 100ml water extraction 2g cloth 1 hour, measuring the water pH value; while the American Standard is 250ml water, 10g cloth, boiling water boiling 10 minutes, measuring the water pH, the two methods is difficult to achieve the same, Not comparable.
6, shrinkage
GB is a horizontal washing machine, American standard washing machine is used, two different washing machines, can not compare the results of the differences. Different drying methods will also be a big difference between the factors. So be sure to confirm with the customer clear water method and drying method.
Xinxiang City Yulong textile specializing in the production of flame-retardant fabrics, fluorescent fabrics, anti-arc fabric and other functional fabrics and custom fire-retardant clothing, fluorescent clothing and other multi-functional clothing.