Process for making poly(trimethylene terephthalate) yarn
    3.
    发明授权
    Process for making poly(trimethylene terephthalate) yarn 失效
    制造聚(对苯二甲酸丙二醇酯)纱线的方法

    公开(公告)号:US6109015A

    公开(公告)日:2000-08-29

    申请号:US111593

    申请日:1998-07-07

    IPC分类号: D01D5/16 D01F6/62 D01H13/26

    CPC分类号: D01D5/16 D01F6/62 Y10S57/908

    摘要: In a method of producing poly(trimethylene terephthalate) yarn from PTT chip which has been extruded through a spinneret into filaments and coated, the coated filaments are passed between an unheated feed roll and a tension roll to tension them without causing permanent stretching, and then are passed from the tension roll to a heated draw roll to draw the filaments in a single draw step to a draw ratio of 1.25 to 4.0 and to heat them to a temperature between their glass transition temperature and their crystallization temperature.

    摘要翻译: 从PTT芯片生产聚(对苯二甲酸丙二醇酯)纱线的方法,其已经通过喷丝头被挤出成长丝并被涂覆,涂覆的长丝在未加热的进料辊和张力辊之间通过以张紧它们而不引起永久拉伸,然后 从张力辊传递到加热的拉伸辊,以在单个拉伸步骤中拉伸长丝至拉伸比为1.25至4.0,并将其加热至它们的玻璃化转变温度和它们的结晶温度之间的温度。