| 摘要 |
PROBLEM TO BE SOLVED: To provide high strength and to prevent the removal from cement molded goods by using short filamentary bodies formed by cutting an extrusion molded and stretched net-like polypropylene(PP) sheet so as to have plural crossing points along a stretching direction as a main component. SOLUTION: This net-like sheet is an integral molding consisting of a continuous resin body of PP and is obtained by uniaxially or biaxially stretching the sheet molded like a net simultaneously with extrusion from a specific die and is formed with the net-like crossing points thicker or bolder than filamentary parts. The net-like sheet is uniaxially or biaxially stretched at a stretching magnification of >=3 times. The preparation of the short filamentary bodies is executed by cutting the net-like sheet along the stretching direction to form the filamentary bodies, then cutting the filamentary bodies so as to have >=2 pieces of the crossing points along the stretching direction, thereby forming the short filamentary bodies. The ratio of the short filamentary bodies is set at >=50 wt.% and the size thereof is preferably set at 200 to 20000 denier and the length thereof at 10 to 70 mm.
|
