Title:
METHOD FOR MANUFACTURING SMC
Document Type and Number:
WIPO Patent Application WO/2021/193234
Kind Code:
A1
Abstract:
Provided is a useful improvement typically in a method for manufacturing a CF-SMC from a continuous carbon fiber bundle having a large number of filaments such as a large tow. The method for manufacturing a SMC according to the present invention comprises (i) chopping a continuous carbon fiber bundle having a number of filaments of NK with a rotary cutter to produce chopped carbon fiber bundles, (ii) fragmenting the chopped carbon fiber bundles using a fragmentation processing device equipped with a rotating body, (iii) accumulating the fragmented chopped carbon fiber bundles on a carrier film that runs below the rotary cutter to form a carbon fiber mat, and (iv) impregnating the carbon fiber mat with a thermoplastic resin composition, in which N is 20 or greater and the fragmentation processing device is equipped with a first pin roller and a second pin roller each having a rotation axis that is parallel with the direction of a rotation axis of the rotary cutter.
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Inventors:
NAKAO HIROYUKI (JP)
WATANABE YASUSHI (JP)
SAMEJIMA TADAO (JP)
MIZUTORI YUKIHIRO (JP)
WATANABE YASUSHI (JP)
SAMEJIMA TADAO (JP)
MIZUTORI YUKIHIRO (JP)
Application Number:
PCT/JP2021/010601
Publication Date:
September 30, 2021
Filing Date:
March 16, 2021
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
B29B11/16; B29C70/18; C08J5/04; D02J1/18; B29K105/12
Domestic Patent References:
| WO2017221688A1 | 2017-12-28 | |||
| WO2017221655A1 | 2017-12-28 | |||
| WO2019142851A1 | 2019-07-25 |
Foreign References:
| JPH054246A | 1993-01-14 | |||
| JPH04135713A | 1992-05-11 | |||
| JP2018187862A | 2018-11-29 | |||
| JP2000017557A | 2000-01-18 | |||
| JPH0542537A | 1993-02-23 | |||
| JP2020056724A | 2020-04-09 | |||
| US20120213997A1 | 2012-08-23 |
Attorney, Agent or Firm:
TAZAKI Akira et al. (JP)
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