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A fluid-tight slide fastener

A fluid sealing and zipper technology, applied in clothing, fasteners, sliding fastener elements, etc., can solve problems such as delamination defects, layer separation, mechanical properties that do not meet requirements, and achieve good adhesion and flexibility.

Inactive Publication Date: 2009-04-08
RIRI GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] These known zippers prove to be effectively fluid-tight at the tooth-outer barrier interface, but are generally mechanically unsatisfactory and suffer from the so-called delamination defect, i.e. the layers separate from each other, especially due to high Intensive use and / or frequent cleaning especially

Method used

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Examples

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example 1

[0059] Yarns are produced by conventional spinning methods from polyester fibers that have been previously cut to obtain natural staple fibers. Similar to eg "pile" textile materials imitating natural fiber yarns, the yarns thus obtained have an irregular, rough surface.

[0060] The yarn is used to make a textile tape, which is completely coated with a layer of melted TPE-U through a conventional extrusion head.

[0061] The coated strips are then each provided with rows of aligned locking teeth along the longitudinal edges, said rows being arranged at a predetermined distance from each other. The lock teeth are each made of a mixture of ABS and PA. The tooth application is carried out in the conventional way by injection overmolding the material of the tooth onto said longitudinal edges of the coated strip (according to the manufacturer's recommended procedure).

[0062] The coated strip equipped with said rows of aligned teeth is then thermally cut transversely along succ...

example 2

[0071] The zipper is prepared by using an adhesive for bonding the layers of the tape.

[0072] An adhesive layer (polyurethane resin) was applied to the opposite surface of the PE tape by soaking the tape in a dispersion adhesive; the tape was then covered with a TPE-U fluid barrier according to the procedure of Example 1.

[0073] After the tape was coated, the same procedure as in Example 1 was also carried out, thereby obtaining a plurality of zippers which were tested for resistance to delamination of the layer structure of the tape.

[0074] It has been found that due to the presence of the adhesive between the fluid barrier layer and the textile layer of each strip, the fluid barrier layer and the textile layer adhere extremely strongly to each other, and as a result, observed before and after each repeated washing cycle There is no delamination to such layers.

[0075] Specifically, in any case, the fluid barrier and textile layers of the respective strips were found ...

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PUM

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Abstract

A fluid-tight slide fastener (10) comprising tapes (12) with an inner textile layer (14) and a fluid barrier layer (16), teeth elements (21) and a slider (22), wherein said textile layer (14) is made with a spun yarn of cut fibers. Preferred materials are also disclosed for the textile layer, the fluid barrier layer and the teeth, including PE for textile layer, TPE-E or TPE-U for the fluid-barrier layer and PBT, ABS, polyamide (PA) and their blends or copolymers for the teeth. A process for making slide fasteners is also disclosed, wherein strips of a spun yarn textile material are coated by extrusion or lamination of a melted fluid-barrier material.

Description

technical field [0001] In its broadest aspects, the present invention relates to a fluid-tight zipper. The invention also relates to a method for producing a fluid-tight zipper. [0002] The term "fluid-tight" means that the zipper is resistant to liquids and / or gases (such as water and / or air) even when the zipper is subjected to a significant pressure difference between the inside and the outside (for example, up to about 2 bar). pass. Background technique [0003] Fluid-tight zippers are required in many applications such as sports and outdoor activity equipment, diving or sailing suits, camping tents, etc. The zippers are also often required to be strong and bend easily. [0004] Generally, a zipper includes a pair of straps carrying respective rows of teeth, top and bottom stops, and a slider for engaging and disengaging the teeth. Known constructions for fluid-tight zippers include multi-layer strips having an inner reinforcement layer of textile material encapsula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A44B19/00A44B19/32B29C45/14
CPCA44B19/34A44B19/32Y10T29/49782Y10T24/2514
Inventor 利维奥·科苏蒂马克·巴茨
Owner RIRI GROUP