Toyo Boseki Kabushiki Kaisha

Takayoshi Fujita

Hisao Nishinaka

Meiji Anahara

Yoshihisa Dammoto

Shigeo Nagira

Michio Ohota

Potential bulky polyester associated bundles or yarns for woven or knitted fabric include spontaneously heat extensible multi-filament A and heat shrinkable multi-filament B. The associated bundles are interlaced at 20-100 interlaces/m. For multi-filament A, the following physical properties apply: &lt;3 denier as a single bundle; 20-80% denier ratio content in associated bundles, wet shrinkage at 100.degree. C. (SHW (A))=0-5%, dry shrinkage at 160.degree. C. (SHD (A))=-15-0%. The properties pertaining to multi-filament B include: fracture tenacity&gt;4 g/denier, denier ratio of 80-29% content in associated bundles, SHW (B)&gt;5-60%. Additionally, SHD (B)-SHD(A)&gt;5%. The invention also relates to processes for forming the bundles and for weaving the bundles into fabric.

Potential bulky polyester associated bundles for woven or knitted fabric

A yarn of thermoplastic synthetic fibers is false twisted and during the false-twisting operation the number of false twists being imparted to the yarn is estimated with high accuracy. The estimation of the number of false twists is carried out by measuring, in a section within the twisting zone of the false-twisting apparatus, the speed of the yarn being processed under a normal operational condition and by the estimated number of false twists the yarn is advantageously quality controlled.

Growing community of inventors

Shiga, Japan

Takayoshi Fujita