The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 1997
Filed:
Jul. 14, 1995
Katsumi Takano, Ibaraki-ken, JP;
Yasushi Katsuta, Ibaraki-ken, JP;
Hideyuki Nakajima, Ibaraki-ken, JP;
Yoshikazu Nagata, Ibaraki-ken, JP;
Sadatoshi Ohno, Chiba-ken, JP;
Tadahiro Kakizawa, Chiba-ken, JP;
Toshio Yonezawa, Chiba-ken, JP;
Junichi Ida, Nagoya, JP;
Masaki Iwata, Nagoya, JP;
Petoca, Ltd., Tokyo, JP;
Takenaka Corporation, Osaka, JP;
Abstract
There are here disclosed carbon fibers for reinforcement of cement which are obtained by applying, onto the surfaces of carbon fibers, esters of oleic acid and aliphatic monovalent alcohols, esters of oleyl alcohol and monovalent fatty acids, polyoxyalkylene bisphenol ethers or polyether esters as sizing agents, and a cement composite material having a bending strength of 300 kgf/cm.sup.2 or more which contains cut carbon fibers having a fiber length of 10 to 50 mm at a mixing volume ratio of the cut carbon fibers to the cement matrix in the range of 1 to 5%. According to the present invention, there are provided the carbon fibers for reinforcement of cement which have excellent adhesive properties to the cement, good process passage properties through a direct spray gun and good bundling properties and which are suitable for a direct spray method, and the cement composite material using the carbon fibers and having high bending strength.