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Title:
PRODUCTION METHOD FOR SEPARATED FIBER BUNDLE, SEPARATED FIBER BUNDLE, FIBER-REINFORCED RESIN MOLDING MATERIAL USING SEPARATED FIBER BUNDLE, AND PRODUCTION METHOD FOR FIBER-REINFORCED RESIN MOLDING MATERIAL USING SEPARATED FIBER BUNDLE
Document Type and Number:
WIPO Patent Application WO/2017/221688
Kind Code:
A1
Abstract:
A production method for a separated fiber bundle. The production method is characterized by including at least [A] a partial separation step for obtaining a partially separated fiber bundle that comprises separation-processed parts and not-separation-processed parts that are alternately formed along the long direction of a fiber bundle that comprises a plurality of single threads, wherein the separation-processed parts comprise a plurality of separated bundles, and [B] a cutting step for cutting along the long direction of the fiber bundle at the not-separation-processed parts of the partially separated fiber bundle formed during step [A]. A separated fiber bundle produced by means of said method, a fiber-reinforced resin molding material that uses the separated fiber bundle, and a production method for the fiber-reinforced resin molding material that uses the separated fiber bundle. The present invention can keep cutting processing to a minimum during the cutting step [B] and, in comparison with conventional techniques in which separation processing is performed by using a slitter or the like to abruptly and continuously make vertical slits in a fiber bundle that comprises a large tow, can reduce the risk of process trouble and the frequency with which a cutting blade is replaced and greatly improve productivity.

Inventors:
MOTOHASHI TETSUYA (JP)
HASHIMOTO TAKAFUMI (JP)
MIYOSHI KATSUHIRO (JP)
SATO CHIASA (JP)
Application Number:
PCT/JP2017/020916
Publication Date:
December 28, 2017
Filing Date:
June 06, 2017
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B29C70/02; B29B11/00; C08J5/06; C08J5/24; B29K101/10; B29K105/12
Domestic Patent References:
WO2014021315A12014-02-06
WO2014007389A12014-01-09
WO2012105080A12012-08-09
Foreign References:
JP2008254191A2008-10-23
JP2002255448A2002-09-11
JP2004100132A2004-04-02
JP2013049208A2013-03-14
JP2014030913A2014-02-20
JPS5512908B11980-04-04
JP2011241494A2011-12-01
US20120213997A12012-08-23
EP2687356A12014-01-22
Other References:
See also references of EP 3476576A4
Attorney, Agent or Firm:
BAN Toshimitsu et al. (JP)
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