Patent ID: 6139675
Filing Date: 2000-10-31
Classification: A41D,B32B,C09J,Y10T

Abstract:
A process of manufacturing a water-based adhesive bonded, solvent resistant protective laminate comprising:providing a microporous, polyolefin-based film having a first surface and a second surface, said film having an areal shrinkage of greater than about 5 percent at temperatures greater than about 100 degrees Centigrade;depositing a discontinuous coating of a water-based, crosslinkable, carboxylated styrene-butadiene rubber latex adhesive on the first surface of the polyolefin-based film, the latex adhesive containing an effective amount of a crosslinking agent;joining a fibrous nonwoven web selected from the group consisting of bonded carded webs, spunbonded webs, meltblown fiber webs and combinations thereof, into intimate contact with the polyolefin-based film to form a laminate; andremoving water from the adhesive thereby causing crosslinking at a temperature at least 5 percent less than the temperature sufficient to cause 5 percent areal shrinkage of the polyolefin-based film, and not greater than about 100.degree. C.;resulting in an adhesive bonded, solvent resistant protective laminate having a dry adhesion strength greater than about 120 grams per two inches, measured using ASTM D1876-72.