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METHOD FOR PRODUCING MIXTURE PTFE YARN AND MIXTURE PTFE YARN PRODUCED BY THE PRODUCTION METHOD, AND REINFORCED MIXTURE PTFE YARN AND METHOD FOR REINFORCING MIXTURE PTFE YARN
METHOD FOR PRODUCING MIXTURE PTFE YARN AND MIXTURE PTFE YARN PRODUCED BY THE PRODUCTION METHOD, AND REINFORCED MIXTURE PTFE YARN AND METHOD FOR REINFORCING MIXTURE PTFE YARN
PROBLEM TO BE SOLVED: To provide a method for producing a mixture polytetrafluoroethylene (PTFE) yarn; a PTFE yarn which is produced by the production method and is excellent in tensile strength; and a method for reinforcing the PTFE yarn.;SOLUTION: A method for producing a mixture PTFE yarn using mixture PTFE powder containing 73-95 wt.% PTFE, 3-25 wt.% MoS2, 1-5 wt.% of Al2O3 and 1-5 wt.% of Al(OH)3 includes: a heat insulation adjustment step of putting kerosine as a solvent into the mixture PTFE powder to keeping a temperature of the mixture PTFE powder; an extrusion step of extruding the mixture PTFE powder of which the temperature is adjusted to be kept to a rod of which a cylinder temperature is 70-90°C and a cross section has a circular or oval shape; a rolling step of rolling the rod into a sheet shape; a folding step of folding the sheet in a multiple form, and passing the folded sheet through an oven at 250-270°C at a speed of 10-40 cm/s; and a drawing step of heating the folded sheet to 450-500°C, and then drawing the heated sheet in a multiple stages at a drawing ratio of 200-600%.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT
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