Composite breathable housewrap films

Details Composite breathable housewrap films Composite breathable housewrap films

B - Operations, Transporting

32

B

154/78

B32B 27/06 (2006.01) B32B 3/26 (2006.01) B32B 27/12 (2006.01) B32B 27/32 (2006.01)

Patent

CA 1311181

ABSTRACT OF THE DISCLOSURE Composite breathable film comprising a breathable polyolefin film heat laminated to a nonwoven HDPE fabric. Preferably the breathable film in prepared by melt embossing a highly filled polyolefin film to impose a pattern of different film thickness therein, and stretching the embossed film. The nonwoven fabric is made by cross-laminating HDPE fibers at the crossing points to form a thin open mesh fabric, and coextruding a heat seal layer thereon. The composite is made by heat laminating the breathable film to the heat seal layer of the fabric. The resulting laminate has excellent water vapor transmissibility, air resistance and strength and is particularly adapted for use as a housewrap.

567033

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