W. R. Grace Co.-conn.

Carmen J Melillo

Jyoti Seth

James R Hansen

Jamal N Hamdar

John E Abrahamson

Russell A Victoria

Robert Sorrentino

An exemplary moisture barrier membranecomprises a waterproof adhesive layer, () a carrier support, () and a release liner () composite having a paper sheet, () cutting strings, () a polyolefin () coating or film for holding the strings against the paper and apart from the waterproof adhesive layer, and a release agent () such as silicone or wax over the polyolefin coating or film. This construction allows for relatively thin paper and strings to be used, such that tear resistance is conferred upon the release liner composite as a whole.

Moisture barrier membrane with tearable release liner composite

Skid-resistant moisture barriers of the invention, such as house wrapping, waterproofing membranes, and roofing underlayrnents, have a carrier sheet with polymer nodules deposited thereon through a rotating screen roll or by transfer means such as a gravure roll. Precise coating levels and polymer distribution can be achieved more easily when compared with prior art coating and embossing methods.

Process for making skid resistant moisture barriers

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Wilmington, MA, United States of America

Carmen J Melillo