Patent ID: 11884838
Assignee: TORAY PLASTICS (AMERICA), INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC C  B | IPC B  C

Claim 20:
21. A method to form a film comprising:
stretching a polyester-containing core layer longitudinally to form a first stretched layer; applying a coating mixture comprising urethane particles, polyvinyl pyrrolidone (PVP) and a crosslinker to the first stretched layer to form a first coated layer; heating the first coated layer; stretching the first coated layer transversally to form a second coated layer; wherein a top surface of the second coated layer has a surface gloss at 60° according to ASTM D523 equal to 4-12; and
wherein the film further comprises a coating of a hot melt adhesive, wherein the hot melt adhesive has a cohesive split of 50/50% within the film when approximately 1 gm of the film is coated with approximately 1/16 inch wide, approximately 0.25 g melt beads of the hot melt adhesive at 370° F.