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Title:
PRODUCTION METHOD FOR PREPREG, PREPREG TAPE, AND FIBER REINFORCED COMPOSITE MATERIAL, AND PREPREG PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/040154
Kind Code:
A1
Abstract:
Regarding a method for producing a prepreg that is obtained by applying a matrix resin to a fiber reinforced sheet, the present invention addresses the problem of providing a prepreg production method by which continuously travel can be performed without involving jamming of a generated fluff even when the travel speed is high, and by which a fiber reinforced sheet can be efficiently impregnated with a matrix resin. The present invention uses a prepreg production method comprising causing a fiber reinforced sheet to substantially, vertically downward pass through the inside of a coating part in which a matrix resin is reserved, so as to obtain a matrix resin-impregnated fiber reinforced sheet in which the matrix resin has been applied to the fiber reinforced sheet, and subsequently, heating at least the matrix resin-impregnated fiber reinforced sheet, wherein: the coating part is provided with a liquid reservoir section and a constriction section which are connected to each other; the liquid reservoir section has a portion the cross-sectional area of which continuously decreases along the travel direction of the fiber reinforced sheet; the constriction section has a slit-shaped cross section, and has a cross-sectional area smaller than that of the upper surface of the liquid reservoir section; the distance N from an outlet of the coating part to a heating start point of the matrix resin-impregnated fiber reinforced sheet is 1 m or shorter; and, at a heating end point, a surface temperature P2 (°C) of the matrix resin-impregnated fiber reinforced sheet is equal to or higher than the temperature M (°C) of the matrix resin reserved in the coating part (expression 1).

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Inventors:
OCHI TAKASHI (JP)
KONO YOSHIKAZU (JP)
NISHINO SO (JP)
AOKI JUNICHI (JP)
MINOURA KIYOSHI (JP)
SUZUKI TAMOTSU (JP)
Application Number:
PCT/JP2019/032496
Publication Date:
February 27, 2020
Filing Date:
August 20, 2019
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B29B11/16; B29B15/12; B29K101/10
Domestic Patent References:
WO2013038521A12013-03-21
WO2001028951A22001-04-26
WO2012002417A12012-01-05
WO2009142231A12009-11-26
WO2015060299A12015-04-30
WO2010150022A12010-12-29
WO2015076981A12015-05-28
WO2017068159A12017-04-27
Foreign References:
JPS6416612A1989-01-20
JP2017154330A2017-09-07
JP2012016857A2012-01-26
JPH07252372A1995-10-03
JPS4930453A1974-03-18
JPH0252278A1990-02-21
JPH0631821A1994-02-08
JP2015022799A2015-02-02
JPH01104624A1989-04-21
JP2011132389A2011-07-07
JP2016203397A2016-12-08
JP2017154330A2017-09-07
JP2013022868A2013-02-04
Other References:
SEN-I GAKKAISHI, vol. 64, 2008, pages 262 - 267
See also references of EP 3842202A4
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