Polymeric sheets and laminas having high flexural durability

Details Polymeric sheets and laminas having high flexural durability Polymeric sheets and laminas having high flexural durability

1994-01-21

1995-12-26

Buffalow, Edith

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

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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