| 摘要 |
<p>This method for producing fibers for cement reinforcement is a method for producing fibers for cement reinforcement, said fibers are composed of polypropylene fibers, wherein a polypropylene having a Z average molecular weight (Mz) of 1,000,000 or more and a weight average molecular weight(Mw)/a number average molecular weight (Mn) ratio of more than 5 is melt spun at a temperature of 300-400°C and drawn, thereby obtaining polypropylene fibers having an Mz of less than 1,000,000 and an Mw/Mn ratio of more than 4 but 5 or less. Fibers for cement reinforcement of the present invention is obtained by the above-described production method and has an Mz of less than 1,000,000 and an Mw/Mn ratio of more than 4 but 5 or less. A cement hardened body of the present invention contains fibers for cement reinforcement obtained by the above-described production method. The present invention provides: low-cost fibers for cement reinforcement, which are highly crystalline polypropylene fibers obtained without using a highly crystalline polypropylene; a method for producing the fibers for cement reinforcement; and a cement hardened body.</p> |
