SMC MANUFACTURING METHOD - MITSUBISHI CHEM CORP

Title:

SMC MANUFACTURING METHOD

Document Type and Number:

WIPO Patent Application WO/2021/149578

Kind Code:

A1

Abstract:

Provided is a useful improvement in a CF-SMC manufacturing method in which a continuous carbon fiber bundle is used by being partially split. The present invention provides an SMC manufacturing method including: (i) a step for pulling out, from a package, a continuous carbon fiber bundle (10) that has NK filaments and that is partially split into n sub-bundles in advance; (ii) a step for chopping, with a rotary cutter (234), the continuous carbon fiber bundle (10) pulled out from the package, to obtain chopped carbon fiber bundles (20); and (iii) a step for accumulating the chopped carbon fiber bundles (20) on a carrier film (41) running below the rotary cutter (234), to form a carbon fiber mat (30). Through fragmentation processing in which at least some of the chopped carbon fiber bundles that have not yet been accumulated on the carrier film (41) are brought into contact with a rotating body, the filament number distribution of the chopped carbon fiber bundles in the carbon fiber mat (30) is made different from that obtained without performing the fragmentation processing.

Inventors:

MIZUTORI YUKIHIRO (JP)
KANEHAGI JUNJI (JP)
WATANABE YASUSHI (JP)
SAMEJIMA TADAO (JP)

Application Number:

PCT/JP2021/001014

Publication Date:

July 29, 2021

Filing Date:

January 14, 2021

Export Citation:

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Assignee:

MITSUBISHI CHEM CORP (JP)

International Classes:

B29B11/16; B65H54/02; B65H55/04; B29K105/12

Domestic Patent References:

WO2019151076A1	2019-08-08
WO2017221655A1	2017-12-28
WO2017006989A1	2017-01-12
WO2017221655A1	2017-12-28

Foreign References:

JP2017177522A	2017-10-05
JP2020001851W	2020-01-21
JP2020047205A	2020-03-26
US20120213997A1	2012-08-23

Other References: