PRODUCTION OF DRAWN POLYOXYMETHYLENE OF HIGH STRENGTH AND HIGH ELASTICITY,申请号JP19840268001-传众专利搜索

PRODUCTION OF DRAWN POLYOXYMETHYLENE OF HIGH STRENGTH AND HIGH ELASTICITY

申请公布号：JPS61146812(A)

申请号：JP19840268001

申请日期：1984.12.19

申请公布日期：1986.07.04

申请人：

ASAHI CHEM IND CO LTD

发明人：SHIMURA KAZUHIKO;TERADA JUNICHI

分类号：D01F6/66;D02J1/22

主分类号：D01F6/66

摘要：PURPOSE:In the multistage drawing of thick polyoxymethylene undrawn filaments, the tensions in individual stages are kept under specific conditions to effect drawing at a high draw ratio whereby the titled drawn filament of extremely high tensile strength and elasticity is obtained, which are suitable for use as buts or ropes. CONSTITUTION:When thick polyoxymethylene undrawn filaments are subjected to multistage drawing, as they are heated with an external means, the tensions T(kg) in individual drawing stages are kept so that they satisfy the equation: T>=1.00.lambdad.Ss(kg) (lambdad is draw ratio to the undrawn filament calculated from the cross section area ratio; Ss is the cross section area of drawn filament in mm<2>), preferably the equation: T>=1.50.lambdad.Ss and the filaments are drawn at a draw ratio over 20 to give the objective filament.