METHOD FOR PRODUCING THERMOPLASTIC RESIN-IMPREGNATED SHEET-FORM REINFORCING FIBER BUNDLE, AND MOLDED ARTICLE

Title:

METHOD FOR PRODUCING THERMOPLASTIC RESIN-IMPREGNATED SHEET-FORM REINFORCING FIBER BUNDLE, AND MOLDED ARTICLE

Document Type and Number:

WIPO Patent Application WO/2020/040122

Kind Code:

A1

Abstract:

Provided is a method for producing thermoplastic resin-impregnated sheet-form reinforcing fiber bundle obtained by impregnating reinforcing fibers made from continuous fibers with a thermoplastic resin, said method comprising: an application step in which a sheet-form reinforcing fiber bundle obtained by arranging reinforcing fibers made from continuous fibers in one direction is passed through an application unit which stores thermoplastic resin, and the thermoplastic resin is applied to the sheet-form reinforcing fiber bundle to constitute a thermoplastic resin-impregnated sheet-form reinforcing fiber bundle; a further impregnation step in which the applied thermoplastic resin is further impregnated into the interior of the thermoplastic resin-impregnated sheet-form reinforcing fiber bundle; and a shaping step in which the thermoplastic resin-impregnated sheet-form reinforcing fiber bundle is shaped and solidified by cooling. In the application step, the sheet-form reinforcing fiber bundle is passed downward in a vertical direction to apply thermoplastic resin to a band-shaped reinforcing fiber bundle, and in the application step and the further impregnation step, the thermoplastic resin is heated to a temperature of at least the melting point +30°C, and the viscosity of the thermoplastic resin in the heated state is 5-200 Pa·s. With regard to the method for producing a thermoplastic resin-impregnated sheet-form reinforcing fiber bundle, continuous production which curbs the occurrence of fluff and eliminates fluff blockages is possible, and it is also possible to efficiently impregnate the sheet-form reinforcing fiber bundle with a thermoplastic resin, and enable high-speed production.

Inventors:

KOSHI MASAYUKI (JP)
ISHIDA SHOMA (JP)
NARUSE YOSHIHIRO (JP)

Application Number:

PCT/JP2019/032396

Publication Date:

February 27, 2020

Filing Date:

August 20, 2019

Export Citation:

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Assignee:

TORAY INDUSTRIES (JP)

International Classes:

B29B15/14; B29K101/12

Domestic Patent References:

WO2013038521A1	2013-03-21
WO2001028951A2	2001-04-26
WO2012002417A1	2012-01-05

Foreign References:

JPH01178412A	1989-07-14
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JPH07252372A	1995-10-03
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JPS252278B1

Other References: