Discussion on issues of smoke extraction of polyester filament spinning workshops;

Development of polyester filament core yarn sewing thread;

Production and technical characters of direct spinning line of polyester filament in large capacities;

Glycolysis and analysis of products of polyurethane fiber waste with glycerol;

The polyurethane fiber waste was degraded by using diethylene glycol a s the glycolysis agent and dibutyltin dilaurate as the catalyst.

The influence of reaction time,amount of catalyst,weight ratio of polyurethane fiber waste and glycolysis reagents and etc on the properties and chemical structure of the recycled polytetrahydrophrane(PTHF) was investigated.