Toray Industries, Inc.

Masato Masuda

Joji Funakoshi

Akira Kishiro

Tomohiko Matsuura

Yoshitsugu Funatsu

Norio Suzuki

Yasunori Kanemori

Seiji Mizukami

Hirofumi Yamanaka

Yoshiyuki Ueno

Hiroshi Tsuchikura

Hiroshi Takahashi

Kaoru Shimada

Shungo Kanda

Tatsuya Hanawa

Junichi Kasuya

Ryo Matsunaga

Takashi Shibata

Kosuke Hamada

Hideki Morioka

Shunsuke Komachi

Shinya Nakamichi

Masaomi Miyashita

A stretch yarn includes a multifilament including fibers having a coiled crimping form in a fiber axial direction, wherein a coil diameter distribution of crimping in the fiber has two or more groups, a ratio of a maximum group average value to a minimum group average value of the coil diameter (a maximum group average value/a minimum group average value) is less than 3.00, and a cross section of the fibers constituting the multifilament is an eccentric core-sheath cross section.

Stretch-processed yarn, fiber product, composite spinneret, and composite fiber production method

An ultrafine fiber has a fiber diameter (D) of 100 to 5000 nm, a ratio (L/D) of a fiber length (L) to the fiber diameter (D) of 3000 to 6000, and a carboxyl terminal group amount of 40 eq/ton or more. At least a part of a surface layer of the ultrafine fiber may be formed of polyester.

Ultrafine fibers and liquid fiber dispersion

A fiber material combines both stretchability and wear resistance, has a uniform and bump- and streak-free outer appearance, and has a smooth, delicate texture. The eccentric core-sheath composite fiber is characterized in that in the cross-section of a composite fiber composed of two different polymers, an A-component is completely covered by a B-component, a ratio S/D, or the minimum thickness S of the thickness of the B-component covering the A-component to a fiber diameter D, is 0.01 to 0.1, and a perimeter of a portion of fiber, where the thickness is 1.05 times or less the minimum thickness S, is at least one third of the perimeter of the fiber overall.

Eccentric core-sheath composite fiber and combined filament yarn

An object of the present invention is to provide a ligand-immobilized sea-island composite fiber in which generation of fine particles due to peeling of a sea component from an island component and generation of fine particles due to destruction of a fragile sea component are both suppressed. The present invention provides a sea-island composite fiber comprising a sea component and island components, in which a value (L/S) obtained by dividing the average total length (L) of the perimeter of all island components in a cross section perpendicular to the fiber axis by the average cross-sectional area (S) of the cross section is from 1.0 to 50.0 &#x3bc;m, a distance from the surface to the outermost island component is 1.9 &#x3bc;m or less, and an amino group-containing compound is covalently bonded to a polymer constituting the sea component at a charge density of 0.1 &#x3bc;mol or more and less than 500 &#x3bc;mol per 1 gram dry weight.

Sea-island composite fiber, carrier for adsorption, and medical column provided with carrier for adsorption

Glossy fibers can be processed into woven or knitted fabric suitable for clothing applications while exhibiting a sense of deep, lustrous glossiness. The glossy fibers are characterized by having an average reflectance for the visible light region of 20% or greater, an average transmittance of 40% of less, and a contrastive glossiness of 3.0 or less.

Glossy fiber

An object of the present invention is to provide a carrier for adsorbing organic matter, which achieves both of adsorption ability for organic matter and suppression of pressure increase. The present invention provides a carrier for adsorbing organic matter, comprising a sea-island type solid composite fiber, wherein the pore volume is 0.05 to 0.5 cm/g and the fiber diameter is 25 to 60 &#x3bc;m.

Carrier for adsorbing organic matter

A core-sheath conjugated fiber includes two kinds of polymer, wherein the core-sheath conjugated fiber is characterized in that the core component has projected shapes having projections and grooves alternately in a cross section in a direction perpendicular to the fiber axis, the projections are formed continuously in the direction of the fiber axis, and the height (H) of the projections, the width (WA) at the tip of the projections, and the width (WB) of the bottom surface satisfy the formulas at the same time:1.0&#x2264;/()&#x2264;3.0&#x2003;&#x2003;(1)0.7&#x2264;&#x2264;3.0&#x2003;&#x2003;(2).

Core-sheath conjugated fiber, slit fiber, and method of manufacturing such fibers

A sea-island composite fiber in which island components are interspersed in a sea component on a fiber cross-section, wherein the island components have a composite structure formed with two or more different polymers joined together, and the ratio (L/D) of the length (L) of the joint section of the island component and the diameter (D) of the composite island component is 0.1 to 10.0. The sea-island composite fiber has satisfactory high-order processability, and therefore can be produced with high productivity and quality using existing equipment, and thin fibers obtained by removing the sea component have functions of structure control while having an excellent tactile impression.

Sea-island composite fiber, composite ultra-fine fiber, and fiber product

A sea-island composite fiber includes island component fibers having a circumscribed circle diameter of 10 to 1000 nm, a circumscribed circle diameter variation of 1 to 20%, a non-circularity of 1.2 to 5.0, and a non-circularity variation of 1 to 10%.

Sea-island composite fiber

A sea-island composite fiber includes two or more kinds of island components having different cross section shapes of which an irregularity difference is 0.2 or more in a same fiber cross section, wherein at least one kind of island component has an irregularity of 1.2 to 5.0 and an irregularity coefficient of variation of 1.0 to 10.0%.

Sea-island composite fiber, mixed yarn and fiber product

An islands-in-sea fiber includes island components and a sea component arranged to surround the island components, wherein the island components and the sea component are composed of at least two polymers and are provided on a fiber cross-section in a direction perpendicular to the fiber axis. The islands-in-sea fiber is a raw yarn for a combined filament yarn, which can be used to produce a cloth having good tension and drape and an excellent color-developing property. An islands-in-sea fiber in which at least two types of island components having different diameters are arranged on the same fiber cross section, the islands-in-sea fiber characterized in that at least one type of the island components have diameters of 10-1000 nm and have fluctuations in diameters of 1.0-20.0%.

Sea islands fiber

The fiber cross-section of an island-in-a-sea composite fiber perpendicular to the fiber axis, the island component and sea component are arranged such that the sea component surrounds the island components. The composite cross-section is very consistent, and the fiber has excellent post-processibility. The island-in-a-sea composite fiber wherein diameter of the island component is 10 to 1000 nm, variation of the island component diameter is 1.0 to 20.0%, modification ratio is 1.00 to 1.10, and variation of the modification ratio is 1.0 to 10.0%.

Composite fiber

A sea-island composite fiber has an island component which is ultrafine fibers having a noncircular cross-section, the ultrafine fibers being uniform in the degree of non-circularity and in the diameter of the circumscribed circle. The sea-island composite fiber includes an easily soluble polymer as the sea component and a sparingly soluble polymer as the island component, and the island component has a circumscribed-circle diameter of 10-1,000 nm, a dispersion in circumscribed-circle diameter of 1-20%, a degree of non-circularity of 1.2-5.0, and a dispersion in the degree of non-circularity of 1-10%.

Growing community of inventors

Mishima, Japan

Masato Masuda