According to Baidu Encyclopedia, the standard delivery product of polyester staple fiber is the excellent cotton product in GBT 1446420 17. At the same time, the oil content is between 0. 1-0.2% and the moisture regain is between 0.3-0.6%. The moisture regain of 0. 17 is abnormal.

Polyester staple fiber is a fiber made of polyester, namely polyethylene terephthalate, which is polymerized by PTA and MEG, then spun into tow and cut.