Asahi Kasei Kogyo Kabushiki Kaisha

Asahi Kasei Kabushiki Kaisha

Masataka Ikeda

Hiroshi Yamazaki

Tsukasa Shima

Yasushi Kishimoto

Tatsuo Ishikawa

Naoki Kataoka

Yasushi Miyake

Kohichi Shohji

An undergarment formed from a tubular mixed knitted fabric that comprises a poly(trimethylene terephthalate) fiber crimped yarn and a short fiber, a blending ratio of the crimped yarn is 15 to 60% by weight, a blending ratio of the short fiber is 30 to 85% by weight, and the tubular mixed knitted fabric has a course number of from 30 to 70 courses/2.54 cm and a wale number of from 30 to 70 wales/2.54 cm.

Undergarment

The present invention provides a warp knitted fabric containing a latent crimp fiber but no elastic fiber, and showing a stretchability of 60% or more in both the warp and weft directions, and a residual strain at 60% elongation recovery of 15% or less in both the warp and weft directions. The warp knitted fabric of the present invention shows little lowering of the stretchable functions during dyeing at high temperature, repeated washing, repeated stretching, or the like treatment, and is excellent in elongation recovery due to the high stretchability, surface smoothness and shape retention.

Warp knitted fabric

A weft knitted fabric made from a poly(trimethylene terephthalate) fiber yarn and not containing other elastic yarns such as a polyurethane yarn, a polyester type elastic yarn and a polyester ether type elastic yarn, and showing an elongation under constant load in a range from 80 to 250% in the weft direction under a load of 19.6N per 2.5 cm, an elongation elastic modulus after elongation by 50% of 80% or more in the weft direction, a fabric weight per square meter in a range from 80 to 500 g/m , a bulk density in a range from 0.28 to 0.60 g/cm and a shear rigidity G in a range from 0.28 to 1.50 cN/cm&bull;deg.

Weft knitted fabric

A stretchable nonwoven fabric manufactured by using a hydrogenated block copolymer obtained by hydrogenating a block copolymer including polymer blocks A constituted mainly by a vinyl aromatic compound and a polymer block B constituted mainly by a conjugated diene compound, at least one polymer block B being arranged on an end of a polymer chain of the block copolymer, as a raw material. The spinning property and characteristics of the nonwoven fabric can be further improved by adding a polyolefin to the above raw material. The obtained stretchable nonwoven fabric has a superior strength, extension characteristics, i.e., elongation and extension recovery, and weathering resistance, and can be broadly used for many applications due to those characteristics.

Stretchable nonwoven fabric and method of manufacturing the same

A nonwoven fabric having a weight per unit area of 5 g/m.sup.2 to 500 g/m.sup.2 composed of a polyallyene sulfide fiber having a mean fiber diameter of 0.1 .mu.m to 8.0 .mu.m is provided. The nonwoven fabric of extra fine polyallylene sulfide fibers has superior heat resistance, wet heat resistance, resistance to chemicals and fire retardant properties, suitable for various filter applications.

Polyallylene sulfide nonwoven fabric

The disclosed composite fabric, useful as a substratum for artificial leather, comprises a woven or knitted frabic and at least one non-woven fabric firmly bonded to the woven or knitted fabric, and is produced by providing a precursory sheet with two or more layers from a woven or knitted fabric and one or more fibrous webs which consist of numerous extremely fine fibers having an average diameter of from 0.1 to 6.0 microns, and uniformly impacting the fibrous web surface of the precursory sheet with numerous fluid jets ejected under a high pressure of from 15 to 100 kg/cm.sup.2, at a ratio of a total impact area of the fluid jets on the precursory sheet surface to an area of the precursory sheet surface to be impacted of at least 1.5, in order to allow the extremely fine fibers in the fibrous web to randomly entangle with each other and also to allow a portion of the extremely fine fibers to penetrate into the inside of the woven or knitted fabric and entangle with a portion of the fibers in the woven or knitted fabric.

Growing community of inventors

Takatsuki, Japan

Masataka Ikeda