Stock material or miscellaneous articles – Sheets or webs edge spliced or joined
Patent
1997-06-27
1999-03-23
Thomas, Alexander
Stock material or miscellaneous articles
Sheets or webs edge spliced or joined
156 734, 156 735, B32B 310, B32B 3114
Patent
active
058856790
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a water-resistant joining structure for waterproof fabric and method for forming a water-resistant joining structure for textile goods converted from a waterproof fabric. Specifically, a joining structure portion, in which waterproof fabrics with coatings of a thermoplastic elastomeric resin film layer on their respective base fabrics are joined together, provides a water-resistant joining structure having an exceedingly durable waterproof property together with an excellent pliability in bending while having an outward appearance of a seam similar to those of conventional cloths. The present invention provides a method of producing such a structure.
BACKGROUND ART
A waterproof fabric comprising a base fabric with a resin coating thereon, especially a moisture (water vapor) permeable waterproof resin coating has been used in a broad range of clothes, for example, sport clothes such as windcheaters, waterproof work wear for use in rainy weather, and waterproof uniforms (coats and loose jackets). These uses take advantage of the moisture permeability and waterproof properties of the waterproof coated fabric.
A waterproof garment made of waterproof fabric is, in general, produced by joining cloth pieces, which are cut to desired shape from a waterproof fabric, together into a welt seam (to give a decorative effect and to prevent seam catching or so called mimesis) by sewing, and thereafter laminating a sealing tape on the inner side of the welt seam portion. For this reason, there is encountered a problem in which the seamed portion of the garment becomes exceedingly less waterproof than the waterproof fabric material itself.
Further, a sealing tape cannot be applied in the prior art unless a garment is made of a fabric constructed of a small denier filamentary yarn. This is because an expected waterproof property cannot be obtained when a sealing tape is applied to the fiber surface of the base fabric of a waterproof fabric with a resin coating on its right side, especially when the base fabric of a waterproof fabric is a knitted fabric such as tricot which is made of a large denier filamentary yarn or spun yarn made of staple fiber.
In case where a sealing tape is applied onto the back side of a waterproof fabric, the joining seam portion becomes stiff due to both the application of the sealing tape and lack of close contact between the sealing tape and the base fabric.
Still another drawback encountered in the application of sealing tape is that a joining seam may cause an insufficiency in waterproof property when a sealing tape is readily buckled or poorly disposed, off the run of stitches, due to the presence of a bent or curved run of stitches in a seam structure. Accordingly, use of straight-line stitching has been the only way to avoid an occurrence of buckling and/or slipping-off of sealing tape over the stitching line. Use of a straight line stitching, however, greatly restricts the possible range of garment design.
In the manufacturing clothes such as sport clothes such as windcheaters and the like, rain wear, waterproof work wear from a waterproof fabric composed of a base fabric and thermoplastic resin film layer, it has been known that high-frequency welder, an ultra-sonic welder and the like have been used for obtaining a joining bond free from sewing stitches between overlapping faces of base fabrics, with or without the use of adhesive, in order to prevent joining interfaces of fabrics (or cloths) being penetrated by water.
These known methods of joining by means of a welded bond by a high-frequency welder can produce waterproof joining bonds in which the waterproof property is maintained only at an early stage of their use. However, joining bonds obtainable by the known method of melt adhesion bonding gives, on the whole, relative low bond strengths when being compared with those of joining seams obtained by sewing. Besides, the joining bonds by the known methods tend to be stiff and easily damaged and/or split, therefore they have a drawb
REFERENCES:
patent: 4461662 (1984-07-01), Onishi
Derwent Abstract No. 86-046091 to Shimada dated Jan. 6, 1986 (which document relates to Japanese Patent Application No. 61-000666).
Derwent Abstract No. 90-144962 to Fujita dated Apr. 3, 1990 (which document relates to Japan Patent Application No. 02-092519).
Kamiya Masami
Yasue Masaharu
Asahi Kasei Kogyo Kabushiki Kaisha
Thomas Alexander
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