| 摘要 |
PURPOSE: A multi-wall pipe is provided to improve the ductility of an adhesive layer by adding reinforcing fibers to an adhesive resin, thereby improving resistibility in a weak ground. CONSTITUTION: A multi-wall pipe(10) comprises a profile(11) wound in a spiral shape and an adhesive layer(12). 1-5 vol% of reinforcing fibers(12-1) are mixed to the adhesive resin of the adhesive layer with respect to the entire volume. 1-5 wt% of vegetable antimicrobials are mixed to 100 wt% of the resin of the adhesive resin of the adhesive layer. The vegetable antimicrobials is composed of a mixture of one or two of powdered leaves of Vaccinum oldhami, powdered grass of asparagoides, and powdered grass of plumbaginaceae.
|
