| 摘要 |
The present invention provides a flammability multifilament yarn comprising a polyester formed from dicarboxylic acid and diol components which contains, in the polymer chain, units of the formula I or cyclic alkylene, arylene or aralkylene radical, and R1 is an alkyl radical of up to 6 carbon atoms or an aryl or aralkyl radical, wherein the yarn has a tenacity of at least 65 cN/tex, a total burn time, when made into a loomstate cloth and subjected to the flammability test of DIN 4102/B2, which is at least 5 times shorter than that of a comparable loomstate cloth composed of non-phosphorus-modified polyester, and wherein the yarn has no afterburning on 3 and 15 sec flaming according to DIN 54336 and 3 sec flaming according to DIN 54333.
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