| 摘要 |
PURPOSE: To provide a bellows tube of high strength made of the synthetic resin foamed body capable of easily inserting a tube to be protected and free from the noise due to the water hammer or the like. CONSTITUTION: A bellows consists of a synthetic resin foamed body consisting of an outer layer 2 that is a skin layer of high density and an inner layer 3 that is a foamed layer of low density, the sectional shape is approximately circular, the outer circumferential surface 4 is formed corrugated along the axial direction (X direction as indicated by the arrow), and the inner circumferential surface is formed flat long the axial direction. |
