Patent ID: 11892104
Assignee: FUJIFILM CORPORATION
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC F  A  B  C | IPC A  B  C  F

Claim 8:
9. The endoscope flexible tube according to claim 1, wherein a ratio of thicknesses of an inner layer and an outer layer incrementally changes in an axial direction of the flexible tube base with respect to a thickness of the entire resin layer, and
a ratio of the thicknesses of the inner layer and the outer layer at one end of the flexible tube base is Inner layer:Outer layer=5:95 to 40:60, a ratio of the thicknesses at another end of the flexible tube base is Inner layer:Outer layer=95:5 to 60:40, and the ratio of the thicknesses is reversed between both ends.