A sheet material has good mechanical properties, flexibility, lightweight properties, and quality, and also relates to a production method therefor. The sheet material includes, as constitutional components, an elastic polymer and nonwoven fabric composed mainly of ultrafine hollow fiber with an average monofilament diameter in the range of 0.05 to 10 μm, the ultrafine hollow fiber containing 2 to 60 hollows.

A sheet material has good mechanical properties, flexibility, lightweight properties, and quality, and also relates to a production method therefor. The sheet material includes, as constitutional components, an elastic polymer and nonwoven fabric composed mainly of ultrafine hollow fiber with an average monofilament diameter in the range of 0.05 to 10 μm, the ultrafine hollow fiber containing 2 to 60 hollows.

Various implementations of yarns and multi-component filaments having a plurality of solid particles dispersed throughout a portion of the filaments are described herein. Inclusion of solid particles through a portion of the filaments allows for differing certain properties in products formed from the filaments while maintaining desirable physical properties such as strength or abrasion resistance. For example, including translucent or transparent particles, such as glass flakes or mica, may differ the visual properties, such as providing an increased luster. And, in other implementations, opaque solid particles may be included through a portion of the filaments to create a different property for a product formed with the filament.

Various implementations of yarns and multi-component filaments having a plurality of solid particles dispersed throughout a portion of the filaments are described herein. Inclusion of solid particles through a portion of the filaments allows for differing certain properties in products formed from the filaments while maintaining desirable physical properties such as strength or abrasion resistance. For example, including translucent or transparent particles, such as glass flakes or mica, may differ the visual properties, such as providing an increased luster. And, in other implementations, opaque solid particles may be included through a portion of the filaments to create a different property for a product formed with the filament.

Swabs, materials, and methods of making same, include randomly arranged sea-island bicomponent fibers. According to certain embodiments, swabs and methods of using such swabs are provided so as to collect and release a biological sample comprising a flock fiber tipped applicator wherein the flock fibers are sea-island bicomponent fibers attached to an end portion of the applicator with an adhesive selected from the group consisting of a photocurable acrylic adhesive and a polyurethane adhesive, the bicomponent fibers being structurally stable in water and the sea component of the bicomponent flock fibers being intact.

Swabs, materials, and methods of making same, include randomly arranged sea-island bicomponent fibers. According to certain embodiments, swabs and methods of using such swabs are provided so as to collect and release a biological sample comprising a flock fiber tipped applicator wherein the flock fibers are sea-island bicomponent fibers attached to an end portion of the applicator with an adhesive selected from the group consisting of a photocurable acrylic adhesive and a polyurethane adhesive, the bicomponent fibers being structurally stable in water and the sea component of the bicomponent flock fibers being intact.

Swabs, materials and methods of making the same include randomly arranged sea-island bicomponent fibers which have randomly splayed terminal ends. According to certain embodiments, swabs are provide which include an applicator, and sea-island bicomponent fibers attached to the applicator, wherein at least about 70% of the fibers comprise randomly splayed terminal ends of the islands of said bicomponent fibers along a length of about 45% or less from said ends, and wherein the bicomponent fibers comprise 10-3000 island parts per fiber.

Swabs, materials and methods of making the same include randomly arranged sea-island bicomponent fibers which have randomly splayed terminal ends. According to certain embodiments, swabs are provide which include an applicator, and sea-island bicomponent fibers attached to the applicator, wherein at least about 70% of the fibers comprise randomly splayed terminal ends of the islands of said bicomponent fibers along a length of about 45% or less from said ends, and wherein the bicomponent fibers comprise 10-3000 island parts per fiber.

A highly hygroscopic sea-island type composite fiber has characteristics (1)-(4) below: (1) the island component in a polymer has hygroscopicity; (2) the ratio of the outermost layer thickness T to the fiber diameter R in a cross section of the fiber is 0.05-0.25; (3) the difference (MR) in moisture absorption rate after hot water treatment is 2.0-10.0%; and (4) the content of a phenol group is 16-160 mmol/kg, wherein the outermost layer thickness is the difference between the radius of the fiber and the radius of a circumscribed circle connecting the vertices of the island component disposed at the outermost circumference, and represents the thickness of the sea component present in the outermost layer.

The present disclosure relates to suede-like artificial leather and a production method thereof, and more particularly, to suede-like artificial leather, which is excellent in sensibility such as smooth texture and fullness while satisfying physical properties desired as suede that is used for automotive headliners, fillers, and sun visors using a covering yarn including a core and a sea-island type microfiber surrounding the core in suede used for a vehicle interior part, and a production method thereof.