| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a flexible synthetic resin pipe having excellent strength and shape keeping performance while having flexibility capable of being curvedly constructed, and having a smoothly constituted pipe inside surface, and to provide the synthetic resin pipe without using polyvinyl chloride resin at all having the possibility of causing environmental pollution at burning time. SOLUTION: This synthetic resin pipe is formed of a corrugated pipe having a cross section forming a spiral waveform in the shaft direction, and a coil pat filled in a spiral groove part of an inside surface of the corrugated pipe, and has the almost smoothly constituted pipe inside surface. The corrugated pipe is formed by spirally winding a tape composed of a hard synthetic resin, and joining the mutual side edges. The coil part is formed by spirally winding a strip belt composed of a soft synthetic resin, and is integrally adhered to an inner wall surface of the corrugated pipe by thermal welding. The corrugated pipe is formed of a polyolefinic hard synthetic resin, and the coil part is formed of polyolefine thermoplastic elastomer. A hollow part is formed inside the coil part.</p> |
