公开(公告)号：US11192346B2

公开(公告)日：2021-12-07

申请号：US16664181

申请日：2019-10-25

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Motoko Yoshizaki ,  Makiko Nakano ,  Yukihiro Ikura ,  Jirou Hiroishi ,  Isao Tomomatsu ,  Yousuke Kokubo ,  Yoichiro Negishi

IPC: B32B27/12 ,  B32B5/12 ,  B32B27/32 ,  B32B37/06 ,  B32B38/08 ,  C08J5/04

Abstract: A laminated body, containing a fiber-reinforced resin, in which a fiber-reinforced thermoplastic resin layer (1) containing fiber bundle of reinforcing fibers and a first thermoplastic resin, and a resin layer (2) containing a second thermoplastic resin, are alternately laminated, to form the fiber-reinforced resin, and the ratio of the indentation elastic modulus EIT-B of the first thermoplastic resin portion of the laminated body with respect to the indentation elastic modulus EIT-C of the second thermoplastic resin is 1.5 or more and 5.0 or less; a fiber-reinforced composite resin material; and a method of producing these.

公开(公告)号：US11203673B2

公开(公告)日：2021-12-21

申请号：US15971718

申请日：2018-05-04

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Motoko Yoshizaki ,  Makiko Nakano ,  Takayori Ito ,  Yukihiro Ikura ,  Takahiro Iida ,  Yasumasa Morishima ,  Hidekazu Hara

IPC: C08J5/04 ,  B29C70/20 ,  B29C43/02 ,  B29C70/30 ,  B29B15/12 ,  B29K23/00 ,  B29K105/08 ,  B29K307/04

Abstract: A thermoplastic composite material comprising, a fiber bundle having a polypropylene emulsion impregnated therein and having a plurality of reinforcing fibers lined up in a predetermined direction, and satisfies the following conditions (1) to (4); and a formed body:
(1) A void content of the thermoplastic composite material is 3% or less,
(2) A fiber volume fraction of the thermoplastic composite material is 40% or more and 70% or less,
(3) A bending strength of a laminated body, in which a plurality of layers of the thermoplastic composite material has been laminated so that the reinforcing fibers would be lined up in one direction, when bent in the fiber-axis direction and measured in conformity to JIS K7074, is 250 MPa or more, and a bending elastic modulus of the laminated body is 90 GPa or more, and (4) A variation coefficient of the bending strength, when measured at N=5 or more and calculated in conformity to JIS K7074, is within 7%.