FIBERS FOR CEMENT REINFORCEMENT, METHOD FOR PRODUCING SAME AND CEMENT HARDENED BODY

WIPO Patent Application WO/2013/089175

A1

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.

KAWAKAMI SHIGEKI

PCT/JP2012/082316

June 20, 2013

December 13, 2012

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DAIWABO HOLDINGS CO LTD (JP)
DAIWABO POLYTEC CO LTD (JP)

D01F6/06; C04B16/06

JP2007262631A	2007-10-11
JPH0813238A	1996-01-16
JP2001123322A	2001-05-08
JPH1181036A	1999-03-26
JP2004018318A	2004-01-22
JPH06248506A	1994-09-06

IKEUCHI SATO & PARTNER PATENT ATTORNEYS (JP)
Patent business corporation Ikeuchi and Sato and partners (JP)

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