	US 11,905,188 B2
	Article and method for making same
Timothy J. Morris, Bridgeton, NJ (US); Donald G. Curran, Swarthmore, PA (US); and David R. St. Germain, Garden Grove, CA (US)
Assigned to SAINT-GOBAIN PERFORMANCE PLASTICS CORPORATION, Solon, OH (US)
Filed by SAINT-GOBAIN PERFORMANCE PLASTICS CORPORATION
Filed on Jun. 17, 2021, as Appl. No. 17/350,173.
Application 17/350,173 is a continuation of application No. 15/418,482, filed on Jan. 27, 2017, abandoned.
Claims priority of provisional application 62/288,050, filed on Jan. 28, 2016.
Prior Publication US 2021/0309541 A1, Oct. 7, 2021
Int. Cl. C02F 1/32 (2023.01); C08J 5/00 (2006.01); B29C 48/00 (2019.01); B29C 48/10 (2019.01); B29C 69/00 (2006.01); B29C 71/02 (2006.01); B29C 71/04 (2006.01); B29C 35/08 (2006.01); B29C 48/37 (2019.01); B29C 48/09 (2019.01); B29C 48/36 (2019.01); B29K 27/12 (2006.01); B29L 23/00 (2006.01)

CPC C02F 1/325 (2013.01) [B29C 48/022 (2019.02); B29C 48/10 (2019.02); B29C 69/001 (2013.01); B29C 71/02 (2013.01); B29C 71/04 (2013.01); C08J 5/00 (2013.01); B29C 48/09 (2019.02); B29C 48/362 (2019.02); B29C 48/37 (2019.02); B29C 2035/085 (2013.01); B29C 2035/0827 (2013.01); B29C 2035/0877 (2013.01); B29K 2027/12 (2013.01); B29K 2995/0018 (2013.01); B29L 2023/005 (2013.01); C02F 2303/04 (2013.01); C08J 2327/18 (2013.01); C08J 2329/10 (2013.01)]

18 Claims

1. A method of making an article comprises:

providing a single layer comprising a melt processable fluoropolymer, wherein the fluoropolymer comprises a copolymer of a tetrafluoroethylene and a perfluoroether heated to a temperature of 250° C. to 420° C. to extrude the fluoropolymer into a tube; and

cooling the tube at a temperature of less than 70° C. to provide the tube with optical clarity, an ultraviolet transmittance of at least about 50% when measured at a thickness of about inches to about 0.062 inches when exposed to ultraviolet radiation of about 200 nm to about 280 nm and a light transmission greater than 50% in the visible light wavelength range, wherein the article has a shore D durometer of less than about 90 at a temperature of about 23° C.+/−5° C.