Waterproof slide fastener and manufacturing method thereof
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United States of America Patent
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Aug 6, 2002
Grant Date -
N/A
app pub date -
Apr 11, 2000
filing date -
Apr 30, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention intends to provide a waterproof slide fastener in which a synthetic resin film is fused to a fastener tape in order to prevent a perforation phenomenon that the synthetic resin film does not exist locally. A laminated synthetic resin film composed of low melting point resin layer having melting point of, for example, 100.degree. C.-140.degree. C. and high melting point resin layer having melting point of, for example, 150.degree. C.-230.degree. C. is fused to a surface or both surfaces of a pair of the fastener tapes with the low melting point resin layer being in contact with and opposing the fastener tape by heating with pressure. Fastener elements are mounted onto a side edge of the fastener tape and the laminated synthetic resin film is formed so as to protrude outward from the side edge of the fastener tape and a center point of coupling of the fastener elements. Because the high melting point resin layer disposed on the surface of the fastener tape is not melted, no perforation phenomenon occurs. Further, because the laminated synthetic resin film protrudes from the side edge, waterproof function is secured.
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