Patent ID: 9585444
Date: 2017-03-07
CPC Classifications: A44B,B29D,Y10T

Claim:
1. A method for manufacturing a slide fastener comprising: a pair of fastener tapes; a pair of fastener element rows provided on respective opposing tape-side edges of the pair of fastener tapes, the pair of fastener element rows having a plurality of fastener elements; and a slider configured to engage and disengage the pair of fastener element rows with and from each other, wherein each of the pair of fastener element rows is comprised of a monofilament which is made of synthetic resin, the method comprising: a step of forming the monofilament by extrusion molding, the monofilament having a surface layer on a surface thereof, the surface layer being able to be colored with dyes; a step of forming a roughened surface having a number of concaves on the surface of the monofilament by performing blast processing on the surface of the monofilament; a step of shaping the monofilament into the fastener element row; and a step of dying the fastener element row, wherein the surface layer has a thickness ranging from 10 μm to 30 μm, and an average roughness degree of the roughened surface is less than a thickness of the surface layer.