| 摘要 |
PURPOSE: A coil-type slide fastener is provided, which is excellent in abrasive resistance. CONSTITUTION: A core cord(3) is inserted into coil-shaped fastener elements(1) made of thermoplastic resin, and the fastener elements(1) are sewn onto a fastener tape(2) by multi-thread chain stitch. Yarn mainly made of thermally meltable synthetic fiber is used for looper thread of multi-thread chain stitch, while yarn of fiber which is not or less meltable is used for needle thread. Entangling points(6) of the looper thread and the needle thread are disposed on the core cord(3). The looper thread is thermally melted to form melted positions(8) where the looper thread and the needle thread entangle with each other at the entangling points(6). As a result, melted portions(7) which have become mono filaments are formed on the fastener elements(1) or no sewing yarn is on the fastener(1) due to thermal melting. Thus, there is no fear of cutting of the sewing yarn due to sliding of a slider and the slide fastener is abrasive resistant. The coil-shaped fastener elements are firmly attached to the fastener tape(2) by using such thermally meltable looper thread. |
