Method for providing liquid-proof seams for corrugated elastic laminates
A liquid-proof seamed article including an elastic laminated panel and a corrugated elastic laminated panel joined at the sealing regions of the laminated panels is provided. In exemplary embodiments, both of the laminated panels are corrugated. The laminated panels each include a textile layer and a protective layer. At least one of the textile layer and protective layer is elastic. An adhesive pre-treatment may be applied to the elastic laminate panel and/or the corrugated laminate panel along respective sealing regions prior to forming a seam. Additionally, the laminate can be stretched to substantially flatten the corrugations prior to forming a seam. By substantially flattening the surface of the corrugated laminated panel(s), an adhesive may be applied such that there are no gaps in the adhesive. The corrugated laminates may be used as material for making garments. An apparatus and a method for making a liquid-proof seamed article are also provided.
1. A method of making a liquid-proof seam for a corrugated elastic laminate comprising:
a) providing a corrugated elastic laminate comprising at least one protective layer and at least one textile layer;
b) forming a seam by joining a sealing region of the corrugated elastic laminate with a sealing region of an elastic laminate to form a seamed corrugated laminate; and
c) sealing said seam by sequentially applying and bonding an adhesive to the seamed corrugated laminate while substantially flattening the corrugations of the laminate at the sealing region, said sealing providing the seamed corrugated laminate with a liquid-proof seam,
wherein the at least one textile layer is inelastic.
2. The method of claim 1 , further comprising pre-treating at least one of said corrugated elastic laminate and said elastic laminate with the adhesive along respective sealing regions prior to forming said seam.
3. The method of claim 1 , wherein said elastic laminate is a corrugated elastic laminate.
4. The method of claim 1 , wherein at least one of said at least one protective layer and said at least one textile layer is elastic.
5. The method of claim 1 , wherein the sealed seam is durably liquid-proof.
6. The method of claim 1 , further comprising applying a second adhesive to form an adhesive layer to at least one side of the corrugated laminate and the elastic laminate along the sealing regions prior to forming said seam.
7. The method of claim 1 , wherein the at least one protective layer is inelastic.
8. The method of claim 7 , wherein the at least one protective layer is corrugated.
9. The method of claim 1 , wherein the at least one textile layer is corrugated.
10. The method of claim 1 , wherein the at least one protective layer is elastic.
11. The method of claim 1 , wherein said protective layer is a material selected from the group consisting of a polyester, a polyamide, a polyketone, a polysulfone, a polycarbonate, a fluoropolymer, a polyacrylate, a co-polyether ester, a co-polyether amide, a polyurethane, a polyvinylchloride, a polytetrafluoroethylene coated with a polyolefin and combinations thereof.
12. The method of claim 11 , wherein the protective layer is an expanded polytetrafluoroethylene (ePTFE).
13. The method of claim 1 , wherein said at least one textile layer has a construction selected from the group consisting of wovens, nonwovens and knits.
14. The method of claim 13 , wherein said at least one textile layer further comprises at least one layer of a brushed, fleeced or napped material.
15. The method of claim 1 , wherein a seam tape is the applied adhesive.
16. The method of claim 6 , wherein a hot melt polyurethane is the second adhesive.
17. The method of claim 3 , wherein the sealed seam comprises (a) sewn stitches which join the first and second corrugated laminate and (b) a seam tape covering the sewn stitches and bonded to the seamed laminate.