Patent ID: 11933998
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Surface technology, coating (Chemistry)
Classification: CPC G  B | IPC B  G

Claim 15:
16. A method of making a film stack comprising:
(c) providing a carrier film comprising a strippable layer disposed between a second layer comprising naphthalene dicarboxylate containing copolyester resin with in-plane birefringence Δnxy<0.02 and a layer of strain hardening polyester having a glass transition temperature at least 5° C. greater than the glass transition temperature of the naphthalene dicarboxylate containing polyester resin of the oriented second layer,
(d) coating a first layer comprising polyvinyl alcohol on the strain hardening polyester, and
(e) orienting the resulting coated carrier film in a second direction.