| 摘要 |
PURPOSE: A multistructured synthetic resin pipe integrated with pipes having small diameter is provided to improve the intensity of the synthetic resin pipe by integrally connecting connection members to the pipes having small diameter, repeatedly. CONSTITUTION: A multistructured synthetic resin pipe(11) is composed of an inner layer(14) formed by connecting connection members, an inner reinforcing layer(15) located at the outside of a join part and integrated with the inner layer, an outer layer(16) formed at the outside of the inner reinforcing layer, and an outer reinforcing layer(17) spirally formed at the outer layer. A core layer(18) and a core reinforcing layer(19) are formed between the inner reinforcing layer and the outer layer.
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