OXIDIZED FIBER BUNDLES, CARBON FIBER BUNDLE PRODUCTION METHOD, AND OXIDATION FURNACE

    公开(公告)号:US20230119738A1

    公开(公告)日:2023-04-20

    申请号:US17910870

    申请日:2021-03-17

    IPC分类号: D02J13/00 D01F9/32

    摘要: 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)

    Device and method for manufacturing crimped textile yarn and cooling drum for such a device

    公开(公告)号:US11598030B2

    公开(公告)日:2023-03-07

    申请号:US16463359

    申请日:2017-11-21

    发明人: Claudio Fiorina

    IPC分类号: D02J13/00 D02G1/16

    摘要: 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 (FB) 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).