| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polypropylene fiber for reinforcing concrete, which has tensile strength of≥450 N/mm<SP>2</SP>, and is free from the generation of rust, inexpensive, and stable. SOLUTION: The polypropylene fiber for reinforcing concrete is produced by using a polypropylene fiber obtained by blending, by weight, 10-40% J(I)-320, 20-50% Y-120, and 20-50% SY-130, each being a polypropylene material, so that the total weight percentage of the polypropylene materials becomes 100%. COPYRIGHT: (C)2006,JPO&NCIPI
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