US 11,912,854 B2
PTFE liners with reduced coefficient of friction
Justin A. Marro, Orangeburg, SC (US); John Richard Campanelli, West Columbia, SC (US); Patrick Cooper, Orangeburg, SC (US); Robert L. Ballard, Lexington, SC (US); and Douglas Lee Tourville, Orangeburg, SC (US)
Assigned to ZEUS COMPANY INC., Orangeburg, SC (US)
Filed by Zeus Industrial Products, Inc., Orangeburg, SC (US)
Filed on May 26, 2021, as Appl. No. 17/330,956.
Claims priority of provisional application 63/030,640, filed on May 27, 2020.
Claims priority of provisional application 63/030,367, filed on May 27, 2020.
Prior Publication US 2021/0371638 A1, Dec. 2, 2021
Int. Cl. C08L 27/18 (2006.01); A61M 39/08 (2006.01)
CPC C08L 27/18 (2013.01) [A61M 39/08 (2013.01); A61M 2205/0222 (2013.01); C08L 2203/02 (2013.01); C08L 2205/025 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A PTFE composite tube comprising PTFE and a second polymer,
wherein the second polymer is present in a concentration of less than about 10% by weight of the PTFE composite tube,
wherein the PTFE composite tube exhibits one or both of:
a lower coefficient of friction as compared to a comparable PTFE tube when tested at 23° C.; and
a smaller change in coefficient of friction from about 23° C. to about 40° C. as compared to a comparable PTFE tube, the comparable PTFE tube not comprising the second polymer,
wherein the PTFE composite tube has a wall thickness of less than about 0.1 mm, and
wherein the PTFE composite tube is in sintered form.