Toray Industries, Inc.

Hirotsugu Suzuki

Masanori Takahashi

Tadakazu Endo

Yoshikazu Kikuchi

Kenji Yabe

Shin-ichi Kitazawa

Yo Ogawa

A process for producing thermal-insulating nonwoven bulky product characterized by its structural make up of substantially continuous single filaments of from about 0.01 to 2 denier which are stabilized on themselves in the product by a surface binder on the filaments.

Process for making a thermal-insulating nonwoven bulky product

A thermal-insulating nonwoven bulky product characterized by its structural make up of substantially continuous single filaments of from about 0.01 to 2 denier which are stabilized on themselves in the product by a surface binder on the filaments and process for making the same.

Thermal-insulating nonwoven bulky product

A nonporous flexible sound insulating sheet is provided which is composed of 50 to 90 wt.% of a nonwoven lead fiber fabric and 10 to 50 wt.% of a vinyl chloride polymer reinforcing material. The reinforcing material fills the spaces between individual lead fibers of the nonwoven fabric to secure the individual lead fibers in their places. The lead fibers are substantially uniformly distributed in the nonwoven fabric and are disposed such that the axes of the lead fibers extend, as a whole, substantially at random in all directions, and such that the lead fibers are not exposed on the surface of the sound insulating sheet. The sound insulation sheet has a thickness of 0.3 to 2.0 mm and a specific gravity of 2.0 to 6.5.

Sound insulating sheet containing lead fibers

A spun-type yarn having a unique configuration and useful properties is manufactured by a novel process which comprises forming a ribbon-shaped fiber bundle being substantially free from twists and composed of randomly oriented continuous filaments, each of which comprises random bends and loops along its length, and then false twisting the ribbon-shaped bundle to consolidate it into a yarn. In the false-twisting, some of the filaments are broken.

Growing community of inventors

Tokyo, Japan

Hirotsugu Suzuki