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US 5,885,679 AGranted
Joining structure for waterproof fabric
AssigneeAsahi Kasei Kogyo Kabushiki Kaisha
InventorsMasaharu Yasue, Masami Kamiya
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AssigneeAsahi Kasei Kogyo Kabushiki Kaisha
InventorsMasaharu Yasue, Masami Kamiya
Estimating the term…
An improved joining structure for a waterproof fabric composed of a base fabric with a soft (elastomeric) resin film adhered thereon is provided. The joining structure is formed in a welt seam in which a hot-melt resin adhesive layer is interposed as a part of intermediate layers of the structure. The joining structure has properties of (1) bond strength .gtoreq.25 kg/25 cm width, (2) bending stiffness .ltoreq.20 gf.multidot.cm.sup.2 /cm and (3) water resistance after rubbing 1,000 times according to Scott shape method .gtoreq.800 mm H.sub.2 O. The joining structure can be formed by a method including joining the waterproof fabrics to form a welt seam with a hot melt resin layer put between and following that applying a high-frequency welding to the welt seam portion at a condition with an insulating elastic sheet interposed between the welt seam portion and electrode means to cause the hot-melt resin to be melted.
A joining structure for a waterproof fabric which contains a welt seam joining an overlap of two layers laid one on top of the other of the waterproof fabrics composed of a thermoplastic resin film layer adhered to on one surface of a base fabric, characterized in that the overlapping layers of the waterproof fabrics are bonded together with an interposed hot-melt resin adhesive layer at the welt seam joining portion, and the welt seam portion has the properties satisfying the following formulae:
A joining structure for a waterproof fabric according to any one of the preceding claims, in which the waterproof fabric is an air permeable waterproof fabric.
A method for forming a joining structure for a waterproof fabric by a process including laminating a base fabric and a resin film to produce a waterproof fabric;
Dependencies are inferred from the claim text.