The invention relates to a method for thermally stabilizing melt-spun PAN precursors. For this purpose, the invention provides a continuous method for producing a thermally stabilized multifilament thread made of a meltable copolymer of polyacrylonitrile (PAN), wherein a pre-stabilized multifilament thread is thermally stabilized and in the process at least temporarily stretched. The invention additionally relates to a thermally stabilized multifilament thread which can be obtained according to a corresponding method and to a carbon fiber which is made of the correspondingly thermally stabilized multifilament thread.

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.

Methods, systems, and devices for changing cross-sectional sizes and/or shapes of flat braided sutures and the resulting constructs are disclosed. The flat braided sutures can have a textile first cross-sectional shape that can be changed to a textile second cross-sectional shape. The systems can have a heater and a die. The flat braided sutures can be movable through the heater and the die. When the flat braided sutures are in the heater, the flat braided sutures can be heatable from a textile first temperature to a textile second temperature greater than the textile first temperature. When the flat braided sutures are at the textile second temperature, the textile first cross-sectional shape can be changeable to the textile second cross-sectional shape.

An oxidation furnace for the oxidative treatment of fibers having a housing which is gas-tight, apart from passage openings for the fibers, inter alia. A process chamber is located in the interior of the housing. Deflecting rollers guide the fibers through the process chamber in a serpentine manner so that the fibers lie next to one another as a fiber carpet which spans a plane between opposite deflecting rollers. An atmosphere-generating device can generate a hot working atmosphere and includes a blowing device with at least one outlet window through which a hot working atmosphere can be blown into the process chamber between two adjacent planes of the fiber carpet (22a). The working atmosphere is guided into the process chamber by a flow guiding system. The flow guiding system includes exchangeable flow guiding elements with flow passages which can be detachably and/or movably mounted on the blowing device, before the outlet window.

An oxidation furnace for the oxidative treatment of fibers having a housing which is gas-tight, apart from passage openings for the fibers, inter alia. A process chamber is located in the interior of the housing. Deflecting rollers guide the fibers through the process chamber in a serpentine manner so that the fibers lie next to one another as a fiber carpet which spans a plane between opposite deflecting rollers. An atmosphere-generating device can generate a hot working atmosphere and includes a blowing device with at least one outlet window through which a hot working atmosphere can be blown into the process chamber between two adjacent planes of the fiber carpet (22a). The working atmosphere is guided into the process chamber by a flow guiding system. The flow guiding system includes exchangeable flow guiding elements with flow passages which can be detachably and/or movably mounted on the blowing device, before the outlet window.

A nonwoven recyclable fabric and associated methods are provided. The fabric is formed from 100% polyester, and may also include surface coatings such as hydrophilic coatings to promote heat transfer as well moisture vapor transmission rates and/or a silicone coating to promote fabric smoothness and reduce abrasiveness of the fabric.

A method of preparing a fiber for use in forming a ceramic matrix composite material comprises the steps of removing a polymer coating from an outer surface of glass or ceramic fibers by providing heated and humidified gas across the glass or ceramic fibers for a period of time.

A method of preparing a fiber for use in forming a ceramic matrix composite material comprises the steps of removing a polymer coating from an outer surface of glass or ceramic fibers by providing heated and humidified gas across the glass or ceramic fibers for a period of time.

Disclosed is a method of manufacturing a nano metal wire, including: putting a metal precursor solution in a core pipe of a needle; putting a polymer solution in a shell pipe of the needle, wherein the shell pipe surrounds the core pipe; applying a voltage to the needle while simultaneously jetting the metal precursor solution and the polymer solution to form a nano line on a collector, wherein the nano line includes a metal precursor wire surrounded by a polymer tube; chemically reducing the metal precursor wire of the nano line to form a nano line of metal wire surrounded by the polymer tube; and washing out the polymer tube by a solvent.

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.