| 摘要 |
PROBLEM TO BE SOLVED: To provide a tubular element that satisfies all conditions of making a fine diameter, a long life formation of a product, and improved tensile strength and flexibility.SOLUTION: This invention relates to a tubular element including an inner layer, a reinforcing layer and an outer layer and the like. A section of a strip body 5 constituting the reinforcing layer crossing with a longitudinal direction thereof is a shape of smooth curved lines. At least a part of the tubular element has a contact region where a part of the surface of the inner layer and the surface of reinforcing layer opposing against the inner layer are contacted to each other at a section crossing at a right angle with a longitudinal direction of the tubular element, and a non-contact region where the other part of the surface of the inner layer and the surface of reinforcing layer opposing against the inner layer forms a clearance between the inner layer and the reinforcing layer.SELECTED DRAWING: Figure 1 |
