中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

53 records (took 0.026 seconds)

    MELT-SPINNING OF SILICA-CONTAINING POLYESTER
    4.
    发明专利
    MELT-SPINNING OF SILICA-CONTAINING POLYESTER 失效

    公开(公告)号：JPS58149325A

    公开(公告)日：1983-09-05

    申请号：JP3056382

    申请日：1982-03-01

    Applicant: TORAY INDUSTRIES

    Inventor： MATSUMOTO TADAYUKI ,  ISHIBASHI HIDEO ,  NAKAGAWA KIYOSHI

    IPC: D01D1/10 ,  D01F6/92

    Abstract: PURPOSE:A melted polyester containing silica particles whose primary particle size on the average and number of coarse particles are lower than specific values respectively is filtered through a specific filtering layer and spun, thus permitting good melt spinning without any troubles such as reduction in spinnability and filtration pressure rise. CONSTITUTION:Melted polyester containing silica particles of less than 100mmu primary particle size on the average and having less than 300 of coarse particles per gram of the polymer is filtered and spun. As filters, are used metallic sand of more than 80 mesh and/or a metallic nonwoven fabric or less than 30mu absolute filtration diameter. In comparison with the filtration pressure in conventional filtration materials such as morundum, the pressure rise and the initial inner pressure are lower and the spinnability is better. The resultant polyester fiber is preferably used for improved color development.

    MANUFACTURE OF MODIFIED POLYESTER FIBER
    9.
    发明专利
    MANUFACTURE OF MODIFIED POLYESTER FIBER 失效

    公开(公告)号：JPS6075612A

    公开(公告)日：1985-04-30

    申请号：JP18124783

    申请日：1983-09-29

    Applicant: TORAY INDUSTRIES

    Inventor： ISHIBASHI HIDEO ,  UCHIDA KAZUO ,  OKADA TAKEHIKO

    IPC: C08G63/00 ,  C08G63/68 ,  C08G63/688 ,  D01F6/84 ,  D01F6/86

    Abstract: PURPOSE:To decrease the amount of chips to be disposed as scrap, and to decrease the ratio of off-grade chip, by mixing polyester chips having the sulfur content, diethylene glycol content and intrinsic viscosity within specific ranges, and spinning the mixed polyester. CONSTITUTION:The sulfur content Swt%, the diethylene glycol content Dwt%, and the intrinsic viscosity [eta] of the polyester chip to be used as a raw material of the objective fiber satisfy at least one of the formula I -formula IV wherein S0(wt%), D0(wt%) and [eta]0 are the target values of the sulfur content, diethylene glycol content and intrinsic viscosity of the mixed chip. Two or more kinds of chips containing the chip wherein the absolute value of Z defined by the formula VII is >1, are mixed together to obtain a chip mixture having an absolute value of Z of

Patent Agency Ranking