Patent ID: 11945204
Assignee: WEST PHARMACEUTICAL SERVICES, INC.
Field: Surface technology, coating (Chemistry)
Classification: CPC B  A  Y | IPC A  B

Claim 13:
14. An elastomeric article for sealing a container, the elastomeric article comprising:
an elastomeric body having an external sidewall surface and an external crown surface; and
a fluoropolymer film layer having an internal surface and an external surface, the internal surface of the fluoropolymer film layer being laminated to an entirety of the external sidewall surface and the external crown surface, external surface of the fluoropolymer film layer including a drug contact surface positioned over the external crown surface and being configured to contact a drug contained in the container and a sealing surface positioned over the external sidewall surface and being configured to contact an interior surface of the container,
wherein the external surface of the fluoropolymer film layer is substantially free of striations, and the sealing surface has a surface roughness characterized by a peak density greater than 50,000 peaks/mm2 when applying a Gaussian filter of 2.0 microns or a peak density greater than 300,000 peaks/mm2 when applying a Gaussian filter of 0.08 microns.