[Problem to be solved] An object of the present invention is to provide a yarn having a core-sheath structure, in which yarn the delamination between the core and the sheath can be inhibited, and a method of producing the same.

[Solution to problem] Present invention provides a yarn having a core-sheath structure including a core composed of a polyamide and a sheath composed of a fluororesin, wherein the fluororesin constituting the sheath contains an adhesive functional group and has a melting point of from 220 to 250 C.

A protective fabric is described, preferably for motorcyclist professional clothing, said monolayer or coupled fabric comprising at least two coupled fabrics which surprisingly meets all the requirements of the applicable reference standards for abrasion, cut and burst resistance, while maintaining unchanged exceptional characteristics of softness, breathability, comfort, washability.

A polytetrafluoroethylene textile and manufacturing method thereof is disclosed. a pretreatment process is performed on a plurality of polytetrafluoroethylene yarns. In the pretreatment process, a step of extending the polytetrafluoroethylene yarns are extended, the polytetrafluoroethylene yarns are knitted into a polytetrafluoroethylene fabric, the shape of the polytetrafluoroethylene fabric is fixed, and the polytetrafluoroethylene fabric are de-knitted into the polytetrafluoroethylene yarns with a plurality of knit-assisting parts. A second knitting process is performed to knit the polytetrafluoroethylene yarns and a plurality of artificial yarns together to obtain the polytetrafluoroethylene textile.

An industrial fabric includes upper surface side warps, lower side warps, wefts and an auxiliary yarn. Each of the lower side warps is arranged below each of the upper side warps respectively. The upper side warps and the lower side warps are woven by the wefts. The auxiliary yarn is disposed between the upper side warps and the lower side warps without being woven by the upper side warps and the lower side warps. The auxiliary yarn is disposed between two of the adjacently disposed wefts.

The present invention provides a plastic optical fiber comprising a core and a sheath consisting of at least one layer, the plastic optical fiber having a transmission loss of 120 dB/km or less as measured by a 25 m-1 m cutback method under conditions of a wavelength of 525 nm and an excitation of NA=0.45, and satisfying either one of the following conditions when a thickness of the innermost sheath layer is 0.5 m to 4.5 m, an amount of foreign matter having a size of 2 m or greater contained in the innermost sheath layer is 2000/cm.sup.3 or less, or a size X (m) of foreign matter contained in the innermost sheath layer and an amount Y of the foreign matter (number/cm.sup.3) satisfy formula (1) below: Y1200 X e.sup.(0.067X) (1). Such optical fibers have a low transmission loss of green light (in particular, light having a wavelength of 525 nm), enabling longer distance communication.

Light-permeable multilayer composite film made of plastic as the surface coating of an article, wherein the composite film comprises at least one outer, at least partially light-permeable top layer optionally provided with a lacquer and at least one further layer arranged on the back of the top layer, wherein arranged on the back side of the top layer is at least one sheetlike, optically active textile layer, preferably a textile layer comprising threads made of polyethylene terephthalate (PET) and/or made of polyvinylidene fluoride (PVDF), wherein the textile layer has light-transmitting, light-refracting and light-reflecting properties or a combination thereof and the transmission, refraction and reflection properties are such that illumination of the textile layer, in particular back side illumination of the textile layer, results in preferably uniformized light transmission through the top layer.

A scaffold for cell culture or tissue engineering is provided. The scaffold includes a fiber web having a three-dimensional network structure, which includes a biodegradable scaffold fiber. Therefore, a microenvironment suitable for migration, proliferation and differentiation of cells to be cultured is created, thereby improving a cell proliferation rate and cell viability. In addition, the scaffold may be easily removed from cells cultured therein without physical/chemical stimuli, and thus the cultured cells may be easily recovered, and is able to be grafted into the body while the cultured cells are included in the scaffold. Moreover, the cultured cells may be cultured to have a similar shape/structure to those of an actual animal body to make it more suitable to be applied in grafting into an in vitro experimental model or animal body. Further, the scaffold is modified with a material helping in cell culture/differentiation, such that cell proliferation and viability may be more enhanced and the culture cells may be easily grown in a three-dimensional shape.

Described herein is the application of centrifugal spinning to provide a flexible mechanoluminescent material composed of rare earth metal doped fibers. Rare earth metal doped fibers are formed, in one embodiment, by centrifugal spinning.

A method of manufacturing an artificial muscle fiber device includes: tethering an artificial muscle fiber around one or more shape-setting pieces; annealing the artificial muscle fiber so that the artificial muscle fiber will retain specific shapes established by the shape-setting pieces; and removing the shape-setting pieces from the artificial muscle fiber.

Yarns made from staple fibers comprising a plurality of fluoropolymer staple fibers with an average caliper diameter of at least 15 micron and a plurality of non-fluoropolymer staple fibers, wherein the ratio of the average caliper diameter of the fluoropolymer staple fibers to the non-fluoropolymer staple fibers in the yarn is 1.2 or greater. Also taught are yarns made from staple fibers with a plurality of fluoropolymer staple fibers having a rectangular cross-section and with an average caliper diameter up to 500 micron, and a plurality of non-fluoropolymer staple fibers with an average caliper diameter up to 40 micron.