The present disclosure relates to a polyethylene fiber and a method for preparing thereof, and more particularly to a polyethylene fiber, a method for preparing thereof, and an apparatus for preparing thereof, which has excellent wearing and touch sensation with processing convenience into woven fabrics and knitted fabrics in use in applied products by reducing the stiffness of fiber having the same physical properties using an enforced necking method in a spinning process.

A method of producing an osteoinductive bone graft formed of a plurality of electrospun biodegradable fibers is disclosed. The method includes preparing a fibrous scaffold material formed of the plurality of electrospun biodegradable fibers, wherein the plurality of electrospun biodegradable fibers are entangled with each other to form a cotton-wool like structure having inter-fiber spaces forming a microenvironment for cell growth therein, and immersing the fibrous scaffold in a solution containing BMP-2 so that the BMP-2 is bound to the calcium particles exposed on the surface of the fibers. Area of binding site for BMP-2 on calcium particles exposed on a surface of the electrospun biodegradable fibers is adjusted by an amount of the calcium particles contained in the electrospun biodegradable fibers.

The present invention relates to a device and to a method for producing a texturized filament or yarn, wherein at least one filament is guided into a draw device, is guided there by a pair of intake rollers towards at least two pairs of drafting system rollers and drawn by the same, downstream of which is disposed a texturizing device with a cooling drum. Downstream the texturizing device with the cooling drum is disposed at least one cooled drafting system roller, by which the filament, respectively the yarn is cooled to a temperature of 0° C. to 50° C.

A draw device into which at least two filaments are guided for producing a multi-coloured yarn from differently coloured filaments which consist of a plurality of endless filaments includes a pair of intake rollers for receiving the at least two filaments. Two pairs of drafting system rollers follow the intake rollers to draw the at least two filaments. A texturizing device comprising a texturizing nozzle with a cooling drum is disposed downstream of the two pairs of drafting system rollers to texturize the at least two filaments, wherein at least one yarn is formed from the filaments in the texturizing nozzle. At least one further nozzle is disposed exclusively upstream of the texturizing device in which each filament is separately interlaced. The filaments are drawn on at least one of the two pairs of drafting system rollers at a speed of at least 1,700 m/min.

A device and a method for manufacturing a synthetic yarn, in which at least two yarn plugs (1), (2), (3) are produced by texturing, are placed in a first zone (A) on the cooling surface (6c) of a rotating cooling drum (6), moved to a second zone (B) and form more than one winding (I),(II), in which the yarn plugs are kept in the second zone (B) by a gas stream (F.sub.B) on the cooling surface (6c), and in which no gas stream or a less powerful gas stream is generated in an intermediate zone (C) in order to prevent the yarn plugs (1), (2), (3) from leaving the second zone (B).

Efficient production of high quality oxidized fiber bundles and carbon fiber bundles is described, comprising a step for heat-treating aligned acryl based fiber bundles in an oxidizing atmosphere while turning them back on guide rollers installed on both ends outside the furnace body of a hot gas heating type oxidation furnace wherein: supply nozzles for supplying hot gas into a heat treatment chamber are installed at an end in the traveling direction of the acryl based fiber bundles; a fiber bundle traveling passage(s) exists above and/or below each nozzle; hot gas is supplied from the supply face(s) located above and/or below the acryl based fiber bundle; and the requirements (1) and (2) are satisfied where Vf and V are defined as described.

1.5 m/s≤Vf≤15 m/s   (1)

1.5 m/s≤V≤10 m/s   (2)

The present invention relates to a continuous process for preparing permselective hollow fiber membranes being suitable e.g. for hemodialysis, hemodiafiltration and hemofiltration of blood which comprises a two-stage drying and tempering treatment of the hollow fiber membranes. According to a further aspect, the invention relates to a continuous process for drying permselective hollow fiber membranes on-line. The invention also relates to devices for on-line drying of permselective hollow fiber membranes.

A poly(phenylene sulfide) fiber changes little in fiber structure and has excellent long-term heat resistance. Namely, the poly(phenylene sulfide) fiber has a degree of crystallization of 45.0% or higher, a content of movable amorphous components of 15.0% or less, and a weight-average molecular weight of 300,000 or less.

Provided herein are scalable methods of processing wet-spun fiber comprising recombinant spider silk polypeptides to generate a three-dimensional crystalline lattice of beta-sheet structures in the fiber.

A method for manufacturing a precursor fiber bundle provides precursor fiber bundles used in manufacturing carbon fiber bundles allowing high productivity and having high tensile strength with less yarn bundle divides in the fiber bundles. The method for manufacturing a precursor fiber bundle includes spinning by extruding a spinning solution through a spinneret to produce a coagulated fiber bundle, and interlacing the coagulated fiber bundle by applying a fluid onto the coagulated fiber bundle. The interlacing includes applying the fluid (18) under a pressure in a range of 0.01 to 0.05 MPa onto the coagulated fiber bundle (14) with a moisture content in a range of 25 to 50% under a tension of 0.02 g/dtex or less.