FIBER-REINFORCED RESIN MOLDING MATERIAL MOLDED PRODUCT AND METHOD FOR PRODUCING SAME

Title:

FIBER-REINFORCED RESIN MOLDING MATERIAL MOLDED PRODUCT AND METHOD FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2020/195756

Kind Code:

A1

Abstract:

Provided are a fiber-reinforced resin molding material molded product and a method for producing same, the molded product being a molded product [D] made of a fiber-reinforced resin molding material [C] obtained by impregnating chopped fiber bundles [A] with a matrix resin [B], wherein in a region excluding 30 mm from the edge of the molded product [D], when an arbitrary rectangular region having an area of at least 40 mm2 and defined by the thickness of the molded product and the width in the direction perpendicular to the thickness direction of the molded product is set in a cross section in an arbitrary thickness direction of the molded product [D], the bundle thickness [E] of the chopped fiber bundles [A] present in the set rectangular region satisfies the requirements [1]-[3] below: [1] when a frequency distribution in which the values of the bundle thickness [E] are distributed at intervals of every 0 μm to 10 μm is created, the most frequent value of the bundle thickness [E] in the span representing the highest value is in the range of 30-100 μm; [2] the proportion of the chopped fiber bundles [A] having a bundle thickness [E] of at least 200 μm is 5% or less; and [3] the CV value of the bundle thickness [E] is in the range of 10-60%. A fiber-reinforced resin molding material molded product capable of exhibiting excellent homogeneity and mechanical properties can be obtained.

Inventors:

YAMANAKA YUSUKE (JP)
HASHIMOTO TAKAFUMI (JP)
MOTOHASHI TETSUYA (JP)
ONO YASUKAZU (JP)

Application Number:

PCT/JP2020/010098

Publication Date:

October 01, 2020

Filing Date:

March 09, 2020

Export Citation:

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Assignee:

TORAY INDUSTRIES (JP)

International Classes:

B29C70/12; B29C70/42; C08J5/04; B29K101/10; B29K105/08

Domestic Patent References:

WO2018143068A1	2018-08-09
WO2017159264A1	2017-09-21
WO2014017612A1	2014-01-30
WO2017159264A1	2017-09-21

Foreign References:

JP2009062474A	2009-03-26
JP2013202890A	2013-10-07
JP2013202890A	2013-10-07
JP5572947B2	2014-08-20

Other References: