The experimental results showed that the high tenacity polyester filament can be obtained by partial innovation of the machine and process adjustment.

Polysulfonamide/high tenacity polyester and polysulfonamide/fire-retardant viscose blended yarns were produced and the properties of the yarns were tested.

By using self-developed high stretch yarn terylene fiber-ball filter media in the treatment of landscape water,the filtering characteristics and effect of correlative factors on filtering performance were studied.

The paper discussed the high shrinkage PET fiber in the respect of its heat shrinkage, heat setting and dying, which are considered to be advan-tageous for textile processing.