초록 ▼

The method and apparatus of the present invention prevents the formation of pin-holes during stretching of strip laminates in the cross machine direction. Pin-holes are prevented by creating slack areas along the length of the web where the edges of the non-woven strips meet with the polymer film, p

The method and apparatus of the present invention prevents the formation of pin-holes during stretching of strip laminates in the cross machine direction. Pin-holes are prevented by creating slack areas along the length of the web where the edges of the non-woven strips meet with the polymer film, pressing the slack areas into the interdigital stretching rollers without stretching the slack areas, and stretching the remainder of the web in a typical manner. The slack regions are formed prior to interdigitation by, for example, formation of a furrow, a fold or a corrugation.

대표청구항 ▼

[ What is claimed is:] [1.]1. A laminate of non-woven fibrous web and microporous polymer film comprising:a microporous polymer film; andat least one strip of a non-woven fibrous web having opposite edges, the strip laminated to the film to form a laminated area along the length of the film and unla

[ What is claimed is:] [1.]1. A laminate of non-woven fibrous web and microporous polymer film comprising:a microporous polymer film; andat least one strip of a non-woven fibrous web having opposite edges, the strip laminated to the film to form a laminated area along the length of the film and unlaminated film areas along the opposite edges, each of said opposite strip edges defining a boundary area between the laminated area and the unlaminated areas;wherein each boundary area is unstretched and the laminated area and the unlaminated areas are interdigitally stretched such that each boundary area is substantially pinhole free.