US 12,480,605 B2
Tube, method for producing tube, and method for storing tube
Hitoshi Imamura, Osaka (JP); Hiroyuki Hamada, Osaka (JP); Eri Mukai, Osaka (JP); Yuuki Kuwajima, Osaka (JP); and Manabu Fujisawa, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Feb. 16, 2022, as Appl. No. 17/673,374.
Application 17/673,374 is a continuation of application No. PCT/JP2020/029884, filed on Aug. 4, 2020.
Claims priority of application No. 2019-150911 (JP), filed on Aug. 21, 2019.
Prior Publication US 2022/0170573 A1, Jun. 2, 2022
Int. Cl. F16L 11/06 (2006.01); B29C 48/00 (2019.01); B29C 48/09 (2019.01); B29C 48/27 (2019.01); B29C 48/32 (2019.01); B29D 23/00 (2006.01); C08F 214/26 (2006.01); B29C 48/69 (2019.01); B29C 48/86 (2019.01); B29C 48/92 (2019.01); B29K 27/18 (2006.01); B29K 105/00 (2006.01); B29L 23/00 (2006.01); C08J 5/00 (2006.01); C08L 27/18 (2006.01)
CPC F16L 11/06 (2013.01) [B29C 48/022 (2019.02); B29C 48/09 (2019.02); B29C 48/274 (2019.02); B29C 48/32 (2019.02); B29D 23/00 (2013.01); B29D 23/001 (2013.01); C08F 214/262 (2013.01); B29C 48/69 (2019.02); B29C 48/865 (2019.02); B29C 48/92 (2019.02); B29C 2948/92704 (2019.02); B29C 2948/92904 (2019.02); B29K 2027/18 (2013.01); B29K 2105/0085 (2013.01); B29K 2995/0072 (2013.01); B29L 2023/00 (2013.01); C08J 5/00 (2013.01); C08J 2327/18 (2013.01); C08L 27/18 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A tube comprising a tetrafluoroethylene/fluoroalkyl vinyl ether copolymer,
wherein the tube inner surface has a surface roughness Ra of 5 nm or less measured by atomic force microscopy (AFM) with an evaluation length set to 3 μm, and
the tube has an amount of metals eluted from the tube inner surface of 0.30 ng/cm2 or less.