Tredegar Surface Protection, LLC

Tredegar Film Products Corporation

Ricky Santoso

Kevin Arthur Brady

Bankim Bhupendra Desai

Carl Douglas Ray

Shailesh Chunilal Patel

A masking film includes an adhesion layer that includes at least one hydrogenated styrene block copolymer and an adhesive surface having a surface roughness (Sa) of greater than about 2.0 μm. An Adhesion Build Value of the masking film is less than about 2.0 after the adhesion layer has been attached to a textured polycarbonate substrate and heated to 85° C. for 30 minutes.

Masking film with improved adhesion stability

Films may be used as interleaves between hard and non-compressible surfaces such as surfaces of sheets or plates made of glass, metal, such as steel, polycarbonate, and/or poly(methyl methacrylate). The films may be embossed and/or may include a foamed core layer having a plurality of micro-voids. In particular, the films may include a polyolefin, a basis weight of between about 30 gsm and about 70 gsm, an embossed thickness of between about 150 microns and 800 microns, and a stiffness of between about 150 grams and about 750 grams according to the Circular Bend Stiffness Test.

Films for use as interleaves between substrates

An illustrative aspect of the invention provides a film comprising a release layer defining a first outer film surface and an adhesion layer defining a second outer film surface opposite the first outer film surface. The adhesion layer comprises a hydrogenated styrene block copolymer with a styrene content in a range of about 30% to 40% by weight. In some embodiments, the adhesion layer may further comprise low density polyethylene (LDPE). In some embodiments, the adhesion layer may further comprise LDPE and high density polyethylene (HDPE).

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Glen Allen, VA, United States of America

Ricky Santoso