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    • 3. 发明公开
    • Polytetrafluoroethylene real twist yarn and method of producing the same
    • Echtgedrehtes Polytetrafluorethylen-Garn und Herstellungsverfahrendafür
    • EP2290140A1
    • 2011-03-02
    • EP10006252.0
    • 2010-06-16
    • Yeu Ming Tai Chemical Industrial Co., Ltd.
    • Huang, JamesChou, Chin-ChunChou, Chin-ChaKuo, Wen-I
    • D02G3/06D01D5/42D01F6/12
    • D02G3/06D10B2321/042
    • The PTFE real twist yarn of the present invention is a PTFE real twist yarn (41) obtained by twisting a polytetrafluoroethylene (PTFE) multi-filament slit yarn. The yarn has a circular cross-section with a circularity in the range of 10/8 to 10/10, where the circularity is expressed by the ratio between the major axis width and the minor axis width, the average fineness of filaments (42) is in the range of 1.5 to 200 dtex, a fineness D is in the range of 50 to 6000 dtex, and a twist coefficient K expressed by Formula (1) is in the range of 10000 to 35000: t ⁢ w ⁢ i ⁢ s ⁢ t c ⁢ o ⁢ e ⁢ f ⁢ f ⁢ i ⁢ c ⁢ i ⁢ e ⁢ n ⁢ t K = n ⁢ u ⁢ m ⁢ b ⁢ e ⁢ r o ⁢ f t ⁢ w ⁢ i ⁢ s ⁢ t ⁢ s T × t ⁢ h ⁢ e f ⁢ i ⁢ n ⁢ e ⁢ n ⁢ e ⁢ s ⁢ s D o ⁢ f t ⁢ h ⁢ e P ⁢ T ⁢ F ⁢ E r ⁢ e ⁢ a ⁢ l t ⁢ w ⁢ i ⁢ s ⁢ t y ⁢ a ⁢ r ⁢ n 1 / 2
      where the number of twists T denotes the number of twists per meter and the fineness D is a total fineness.
    • 本发明的PTFE实捻纱是通过加捻聚四氟乙烯(PTFE)复丝狭缝纱得到的PTFE实捻纱(41)。 该纱线具有圆形横截面,圆形度在10/8〜10/10的范围内,其中圆度由长轴宽度与短轴宽度之比表示,细丝的平均细度(42) 在1.5至200分特的范围内,细度D在50至6000分特的范围内,并且由公式(1)表示的扭曲系数K在10000至35000的范围内:t ¢w ¢i ¢ ¢¢ ¢ ¢ ¢ ¢ ¢ ¢ ¢ ¢ ¢ t t t t t t t¢¢¢¢¢¢¢¢¢ ¢ ¢ ¢ ¢ ¢ ¢ ¢ ¢ ¢ ¢ ¢ ¢¢ ¢ ¢ ¢ ¢ ¢ ¢¢ ¢ ¢ ¢ ¢ ¢ ¢ r ¢n 1/2其中扭曲数T表示每米的扭曲数,细度D是总细度。