CPC B65D 41/0435 (2013.01) [B32B 27/065 (2013.01); B32B 27/322 (2013.01); B65D 53/06 (2013.01); B32B 2266/025 (2013.01); B32B 2305/026 (2013.01); B32B 2305/80 (2013.01); B32B 2435/00 (2013.01); B65D 2251/20 (2013.01)] | 7 Claims |
1. A cap liner, comprising:
a sintered plasma etched fluoropolymer layer having a white color; 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; wherein a thickness of the sintered plasma etched fluoropolymer layer is 0.02 to 0.4 millimeters; and
a backing layer in the form of a continuous layer; wherein the backing layer comprises a closed cell, compressible foam layer having a porosity of 10 to 70 volume percent based on the total volume of the backing layer; wherein the closed cell, compressible foam material comprises at least one of an elastomer or a polyolefin; wherein a thickness of the backing layer is 0.5 to 3 millimeters; 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 free of an etchant residue identifiable by Fourier transform infrared spectroscopy; and
wherein the sintered plasma etched fluoropolymer layer is a solid layer having a porosity of 0 volume percent.
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