| 摘要 |
PURPOSE:To manufacture easily a cubic netlike article wherein each of cyhlindrical and spiral yarns is combined with each other beforehand, by welding unitarily spiral yarns adjoining to each other through warp, in the cubic netlike article made of the aggregate of a pluraility of cylindrical spiral system. CONSTITUTION:A cubic netlike article which is obtained by making a plurality of cylindrical products made of a spiral yarn weld through a warp 2 which is common to each other to cylindrical products and is useful for a contacting member for water treatment, a back-filling member for a turnnel and a drainage member for the ground surface. Simultaneously with molding of each spiral yarn 1 by extrusion of molten resin through a plurality of rotating dies incorporated into a stationary die the warp 2 is extruded through the stationary die and the title netlike article is manufactured through unification of them by performing contact point welding. |
