| 摘要 |
PROBLEM TO BE SOLVED: To provide artificial rush having the same or higher property than natural rush by dividing a cross section in the axis orthogonal direction of a linear hollow body composed of thermoplastic resin into a plurality of substantially fan-shaped hollow parts by partition walls. SOLUTION: Partition walls 1 radially provided, an outer wall 2 of a linear hollow body circumfrentially provided, and artificial rush by a fan-shaped hollow part 3 are provided. When the number of the hollow part 3 is at least three, radial resistance becomes large, and the hollow part 3 is difficult to collapse. The thermoplastic resin part of artificial rush contains the foaming part of 10-50%, and when the void rate of the hollow part 3 in the cross section is 40-90%, monotonic plastic appearance can be improved. Furthermore, when thickness of the partition wall 1 is 20-200μm and thickness of the outer wall 2 is made 100-500μm, restoration after collapse exists, appearance is good, radial resistance is excellent and it is difficult to break. Thus, artificial rush having the same or higher proper than natural rush can be provided. |
