Polymeric sheets and laminas having high flexural durability

Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond

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Details

428204, 428421, 428518, 428916, 283 94, 283904, B32B 300

Patent

active

054786290

ABSTRACT:
Polymeric blends suitable for making plastic sheets and laminas which exhibit improved flexural durability while retaining stiffness and impact strength include a core made from a blend comprising polyvinyl chloride resin, a vinyl chloride-vinyl ester copolymer, one or more acrylic polymers or copolymers, a chlorinated polyolefin, a solid tin stabilizer, and one or more ester waxes. The lamina, which is suitable for use as an extended life credit card, is prepared by forming a polymeric blend of a core material into a base layer sheet material which is subsequently treated to reduce surface tension and improve ink adhesion thereto, then printed with desired indicia, and finally provided with a contact-transparent protective overlay which is laminated thereto. The protective layer is a sheet material made from either a polymer or copolymer such as polyvinyl fluoride, or a polymer blend comprising essentially the same components of the core material but utilizing a different tin stabilizer and including the use as an ultra-violet light stabilizer. The overlay polymer blend material is very compatible with the core material and has good flex life.

REFERENCES:
patent: 4133926 (1979-01-01), Vorrier et al.
Applicants's Disclosure Statement Sep. 30, 1994.

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