IP Library › Granted Patent US 12,599,704
Granted Patent B2
US 12,599,704 · App. 18/147,244 · Granted Apr 14, 2026

Endoscopic flexible tube, endoscopic medical apparatus, and endoscopic-flexible-tube-base-covering material

Inventors: Kazushi Furukawa (Kanagawa, JP); Yoshihiro Nakai (Kanagawa, JP)
Assignee: FUJIFILM Corporation
A61L29/049A61B1/005
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Quick Facts
Patent No.
US 12,599,704
App. No.
18/147,244
Granted
Apr 14, 2026
Kind
B2
Abstract

An endoscopic flexible tube including a sleeve-shaped flexible-tube base having flexibility, and a cover layer for the flexible-tube base, wherein the cover layer contains (a) at least one of (a1) a polyester resin having a naphthalene structure or (a2) a polyester elastomer having a naphthalene structure, and (b) at least one of (b1) a thermoplastic resin not having a naphthalene structure or (b2) a thermoplastic elastomer not having a naphthalene structure, and, in the cover layer, a ratio of the component (a) to a total amount of the components (a) and (b) is more than 50 mass % and less than 90 mass %; an endoscopic medical apparatus including the endoscopic flexible tube; and a covering material for the endoscopic-flexible-tube base.

Claims (13)

1 . An endoscopic flexible tube comprising a sleeve-shaped flexible-tube base having flexibility, and a cover layer for the flexible-tube base,

wherein the cover layer contains components (a) and (b) below and, in the cover layer, a ratio of the component (a) to a total amount of the components (a) and (b) is 53 mass % or more and less than 90 mass %:

wherein the component (a) is (a2) a polyester elastomer having a naphthalene structure; and

the component (b) is (b2) a thermoplastic elastomer not having a naphthalene structure, and

wherein, in the cover layer, the component (a) and the component (b) are phase-separated from each other.

2 . The endoscopic flexible tube according to claim 1 , wherein the (b2) thermoplastic elastomer not having a naphthalene structure includes at least one of a polystyrene elastomer, a polyolefin elastomer, a polyvinyl chloride elastomer, a polyurethane elastomer, a polyester elastomer, or a polyamide elastomer.

3 . The endoscopic flexible tube according to claim 2 , wherein the (b2) thermoplastic elastomer not having a naphthalene structure includes at least one of a polystyrene elastomer or a polyolefin elastomer.

4 . The endoscopic flexible tube according to claim 1 , wherein the cover layer contains a compatibilizer.

5 . An endoscopic medical apparatus comprising the endoscopic flexible tube according to claim 1 .

6 . An endoscopic-flexible-tube-base-covering material comprising components (a) and (b) below, wherein a ratio of the component (a) to a total amount of the components (a) and (b) is 53 mass % or more and less than 90 mass %:

wherein the component (a) is (a2) a polyester elastomer having a naphthalene structure; and

the component (b) is (b2) a thermoplastic elastomer not having a naphthalene structure, and

wherein, in the cover layer, the component (a) and the component (b) are phase-separated from each other.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 28, 2022
From: FURUKAWA, KAZUSHI; NAKAI, YOSHIHIRO
To: FUJIFILM CORPORATION
Reel/Frame 062224/0683 →
Priority Claims (1)
JP 2020-111756 · Jun 29, 2020 · national
Continuity (2)
Continuation PCTJP2021024362 · Jun 28, 2021
Related Publication 20230136764A1 · May 4, 2023
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