US 12,075,976 B2
Flexible tube for endoscope, endoscopic medical device, and methods for producing the same
Yoshihiro Nakai, Ashigarakami-gun (JP); Toshihide Yoshitani, Ashigarakami-gun (JP); Shinya Abe, Ashigarakami-gun (JP); Kazuma Horita, Ashigarakami-gun (JP); and Takeshi Senga, Ashigarakami-gun (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Jun. 10, 2021, as Appl. No. 17/343,899.
Application 17/343,899 is a continuation of application No. PCT/JP2020/000876, filed on Jan. 14, 2020.
Claims priority of application No. 2019-005384 (JP), filed on Jan. 16, 2019.
Prior Publication US 2021/0298564 A1, Sep. 30, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 1/005 (2006.01); A61L 29/08 (2006.01); B29C 48/10 (2019.01); B29C 48/151 (2019.01); B32B 1/08 (2006.01); B32B 15/08 (2006.01); B32B 27/08 (2006.01); A61L 29/02 (2006.01); B29K 101/12 (2006.01); B29K 705/12 (2006.01); B29L 31/00 (2006.01); B32B 15/18 (2006.01)
CPC A61B 1/005 (2013.01) [A61L 29/085 (2013.01); B29C 48/10 (2019.02); B29C 48/151 (2019.02); B32B 1/08 (2013.01); B32B 15/08 (2013.01); B32B 27/08 (2013.01); A61L 29/02 (2013.01); A61L 2420/08 (2013.01); B29K 2101/12 (2013.01); B29K 2705/12 (2013.01); B29L 2031/753 (2013.01); B32B 15/18 (2013.01); B32B 2535/00 (2013.01); Y10T 428/1393 (2015.01)] 18 Claims
OG exemplary drawing
 
1. A flexible tube for an endoscope, the flexible tube comprising:
a flexible tube base containing metal as a constituent material;
a resin cover layer that covers an outer periphery of the flexible tube base; and
a primer layer that includes a compound represented by general formula (1) and that is disposed between the flexible tube base and the resin cover layer,
wherein the resin cover layer includes at least one compound selected from the group consisting of polyamides, polyesters, polyurethanes, and polyolefins at least on a side of the resin cover layer in contact with the primer layer:

OG Complex Work Unit Chemistry
where LL1 represents a monovalent substituent or an n1-valent linking group, L1 represents a single bond or a divalent linking group, Y1 to Y3 each represent a substituent, and n1 is an integer of 1 to 4,
at least one of Y1, Y2, or Y3 is a group selected from the group consisting of alkoxy groups and a hydroxy group, and when n1 is 1, none of LL1-L1 and Y1 to Y3 is a group selected from the group consisting of alkoxy groups and a hydroxy group.