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US 12,054,315 B2Granted
Cap liner comprising a sintered fluoropolymer layer
AssigneeRogers Corporation
InventorR. Ray Patrylak
Life of this patent
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Abstract
In an aspect, a cap liner comprises a sintered fluoropolymer layer; and a backing layer; wherein the sintered fluoropolymer layer is in direct physical contact with the backing layer with no intervening layer located there between. In another aspect, a method of forming the cap liner of comprises plasma etching the sintered fluoropolymer layer to form a sintered plasma etched layer; and laminating the sintered plasma etched layer and the backing layer to form the cap liner.
Claims18
A cap liner, comprising:
- a solid sintered plasma etched fluoropolymer layer having a porosity of 0 volume percent based on the total volume of the solid sintered plasma etched fluoropolymer layer;
- wherein the sintered plasma etched fluoropolymer layer comprises at least one of a poly(tetrafluoroethylene) or a modified poly(tetrafluoroethylene);
- and
- a backing layer in the form of a continuous compressible foam layer having a porosity of 10 to 70 volume percent based on the total volume of the backing layer;
- wherein the sintered plasma etched fluoropolymer layer is in direct physical contact with the backing layer with no intervening layer located there between;
- wherein the sintered plasma etched fluoropolymer layer is co-extensive with the backing layer;
- and
- wherein the cap liner is configured to provide continuous contact between the backing layer and an inner surface of a cap.
5 more elements
A cap liner, comprising:
- a solid sintered plasma etched fluoropolymer layer having a porosity of 0 volume percent based on the total volume of the solid sintered plasma etched fluoropolymer layer;
- wherein the sintered plasma etched fluoropolymer layer comprises at least one of a poly(tetrafluoroethylene) or a modified poly(tetrafluoroethylene);
- wherein the sintered plasma etched fluoropolymer layer is free of a filler;
- and
- a backing layer in the form of a continuous compressible foam layer having a porosity of 25 to 45 volume percent based on the total volume of the backing layer;
- wherein the continuous compressible foam layer comprises at least one of an elastomer or a polyolefin;
- and
- wherein the sintered plasma etched fluoropolymer layer is in direct physical contact with the backing layer with no intervening layer located there between;
- wherein the sintered plasma etched fluoropolymer layer is co-extensive with the backing layer;
- wherein the sintered plasma etched fluoropolymer layer is free of an etchant residue identifiable by Fourier transform infrared spectroscopy;
- and
- wherein the cap liner is configured to provide continuous contact between the backing layer and an inner surface of a cap.
9 more elements
Dependencies are inferred from the claim text.