利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

16 条记录 (耗时 0.022 秒)

    Processes for the production of mono- and multifilaments and staple fibers based on kolyarylene sulfides and high-strength polyarylene sulfide fibers
    15.
    发明授权
    Processes for the production of mono- and multifilaments and staple fibers based on kolyarylene sulfides and high-strength polyarylene sulfide fibers 失效

    公开(公告)号：US5215819A

    公开(公告)日：1993-06-01

    申请号：US621403

    申请日：1990-12-03

    申请人： Wolfgang Anderheggen ,  Michael Kraemer ,  Roland Vogelsgesang ,  Wolfram Wagner ,  Wolfgang Olges ,  Thomas Dragovic

    发明人： Wolfgang Anderheggen ,  Michael Kraemer ,  Roland Vogelsgesang ,  Wolfram Wagner ,  Wolfgang Olges ,  Thomas Dragovic

    IPC分类号： D01D5/08 ,  D01F6/76

    CPC分类号： D01D5/08 ,  D01F6/765 ,  Y10T428/2909 ,  Y10T428/2913 ,  Y10T428/2922

    摘要： This invention relates to processes for the production of mono- and multifilaments and also staple fibers of multifilaments based on polyarylene sulfides, preferably substantially linear polyarylene sulfides and, more preferably, substantially linear poly-p-phenylene sulfide by melt spinning, multistage stretching and optionally crimping and setting.As a result of the treatment by blowing of air onto the stabilized spun filaments in the first stretching stages at temperatures .ltoreq.100.degree. C. (preferably in stretching baths, more particularly in boiling water), the chain molecules are oriented; the orientation and crystallinity required for high strengths is achieved by afterstretching (in hot air) at elevated temperature. The residence times in the first stage required for effective stretching in accordance with the invention can only be varied within relatively narrow limits in order subsequently to achieve the calculated orientations and effects, particularly high strengths, crystallinities and densities. Overly long residence times at temperatures above 100.degree. C. result in elongation of the material with no additional orientation and hence with an inadequate increase in strength.To increase crystallinity and strength in the production of mono- and multifilaments, multistage stretching may be followed by a thermal aftertreatment; in the staple fiber process, the material is additionally crimped, set (in the absence of tension) and cut. Where an aerodynamic crimping nozzle is used, as is preferably the case, stretching has to be carried out in accordance with the invention in such a way that the fibers are left with sufficiently high shrinkage which is important for crimping and subsequent processing. Crimping is improved by setting in the absence of tension. Relatively high-tensile fibers with sufficiently high residual crimping for subsequent processing are obtained.Textile-denier fibers (up to about 20 dtex) having hitherto unknown strengths of >6 cN/dtex, preferably >6.2 cN/dtex and, more preferably, >6.4 cN/dtex are claimed.

    Processes for the production of mono- and multifilaments and staple fibers based on polyarylene sulfides
    16.
    发明授权
    Processes for the production of mono- and multifilaments and staple fibers based on polyarylene sulfides 失效
    用于生产基于聚亚芳基硫化物的单丝和复丝和短纤维的方法

    公开(公告)号：US5024797A

    公开(公告)日：1991-06-18

    申请号：US522296

    申请日：1990-05-11

    申请人： Wolfgang Anderheggen ,  Michael Kraemer ,  Roland Vogelsgesang ,  Wolfram Wagner ,  Wolfgang Olges ,  Thomas Dragovic

    发明人： Wolfgang Anderheggen ,  Michael Kraemer ,  Roland Vogelsgesang ,  Wolfram Wagner ,  Wolfgang Olges ,  Thomas Dragovic

    IPC分类号： D01D5/08 ,  D01D5/12 ,  D01F6/76 ,  D02J1/22

    CPC分类号： D01D5/08 ,  D01F6/765

    摘要： Processes for the production of mono- and multifilaments and also staple fibers of multifilaments based on polyarylene sulfides by melt spinning, multistage stretching and setting. As a result of the treatment by blowing of air onto the stabilized spun filaments in the first stretching stages at temperatures .ltoreq.100.degree. C., the chain molecules are oriented; the orientation and crystallinity required for high strengths is achieved by afterstretching at elevated temperature. The residence times in the first stage required for effective stretching can only be varied within relatively narrow limits in order subsequently to achieve the calculated orientations and effects. Overly long residence times at temperatures above 100.degree. C. result in elongation of the material with no additional orientation and hence with an inadequate increase in strength.

    摘要翻译： 用于通过熔融纺丝，多段拉伸和定型来生产单丝和多丝以及基于聚亚芳基硫化物的复丝的短纤维的方法。 作为通过在100℃的温度下在第一拉伸阶段中将空气吹到稳定纺丝上进行处理的结果，链分子被取向; 高强度所需的取向和结晶度通过在升高的温度下拉伸来实现。 在有效拉伸所需的第一阶段中的停留时间只能在相对窄的范围内变化，以便随后实现计算的取向和效果。 超过100℃的过长停留时间导致材料的伸长，没有额外的取向，因此强度不足。