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Title:
COMPOSITE MATERIAL AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/107248
Kind Code:
A1
Abstract:
The present invention provides: a composite material which comprises a thermoplastic matrix resin and carbon fibers A comprising carbon fiber bundles A1 in which Li/(Ni×Di2) is 6.7×101 to 3.3×103, wherein the carbon fibers A have a fiber length of 5-100 mm and the carbon fiber bundles A1 are contained in an amount of 80 vol% or larger but less than 100 vol% with respect to the carbon fibers A and wherein removal of the matrix resin from the composite material gives a carbon fiber mass which, when compressed to a thickness of Tf, has a repulsive force P of 0.05-1.00 MPa; and a method for producing the composite material, the method comprising subjecting a composite composition comprising carbon fibers and a thermoplastic resin to an impregnation treatment with a compression/impregnation device. Li is the fiber length (mm) of the carbon fiber bundles. Di is the single-filament diameter (mm) of the carbon fibers constituting the carbon fiber bundles. Ni is the number of single-filament fibers contained in the carbon fiber bundles. Tf is [(basis weight of the carbon fiber mass)/(density of the carbon fibers)]×3 (mm).

Inventors:
ONOUE SHUHEI (JP)
KATO TAKUMI (JP)
TOYOZUMI TAKASHI (JP)
OOTSUBO MAKOTO (JP)
OHKI TAKERU (JP)
HUA GUOFEI (JP)
NOMURA AKIHISA (JP)
Application Number:
PCT/JP2018/043024
Publication Date:
June 06, 2019
Filing Date:
November 21, 2018
Export Citation:
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Assignee:
TEIJIN LTD (JP)
International Classes:
C08L101/00; C08J5/04; C08K7/06; D01F9/12
Domestic Patent References:
WO2014017612A12014-01-30
WO2014021316A12014-02-06
WO2014021315A12014-02-06
WO2016152563A12016-09-29
WO2015115225A12015-08-06
WO2007126133A12007-11-08
WO2015111536A12015-07-30
WO2015163408A12015-10-29
WO2017159264A12017-09-21
Foreign References:
JP2013049749A2013-03-14
JP2013072042A2013-04-22
JP2004142165A2004-05-20
JP2016027956A2016-02-25
JP2017022966A2017-01-26
JP2018149791A2018-09-27
Other References:
See also references of EP 3719079A4
Attorney, Agent or Firm:
KOH-EI PATENT FIRM, P.C. (JP)
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