US 11,911,933 B2
Molded body and manufacturing method therefor
Akihiro Maeda, Tokyo (JP); and Masao Tomioka, Tokyo (JP)
Assigned to Mitsubishi Chemical Corporation, Chiyoda-ku (JP)
Appl. No. 15/562,185
Filed by Mitsubishi Chemical Corporation, Chiyoda-ku (JP)
PCT Filed Mar. 30, 2016, PCT No. PCT/JP2016/060454
§ 371(c)(1), (2) Date Sep. 27, 2017,
PCT Pub. No. WO2016/159118, PCT Pub. Date Oct. 6, 2016.
Claims priority of application No. 2015-067850 (JP), filed on Mar. 30, 2015.
Prior Publication US 2018/0104869 A1, Apr. 19, 2018
Int. Cl. B29C 37/00 (2006.01); B29C 43/18 (2006.01); B29C 70/06 (2006.01); B29C 70/08 (2006.01); B29C 70/14 (2006.01); B29C 70/54 (2006.01)
CPC B29C 43/18 (2013.01) [B29C 37/0053 (2013.01); B29C 70/06 (2013.01); B29C 70/083 (2013.01); B29C 70/14 (2013.01); B29C 70/541 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A molded body comprising:
a plate-shaped composite member comprising a fiber reinforced composite material comprising a reinforcing fiber (f1) and a matrix resin (A); and
a plurality of rib portions corresponding to two or more convex stripes which are directly formed on top of a surface of the composite member and comprise a thermoplastic resin (B), wherein at least one of the plurality of rib portions is formed along an inner surface of a bent portion of the composite member or an inner concave surface of a curved portion of the composite member such that a bottom part of the at least one rib portion at an interface between the at least one rib portion and the surface of the composite member continuously contours the composite member from a first end portion of the surface of the composite member through the bent portion or the curved portion and to a second end portion of the surface of the composite member,
wherein the molded body satisfies the following conditions (1′) to (5′):
(1′) an arbitrary rib portion or an extended line of a long axis thereof intersects with another rib portion or an extended line of a long axis thereof on the surface of the composite member;
(2′) a ratio H/t of an average height H to an average width t of the rib portions is 1 or more and 50 or less;
(3′) a ratio SR/S of an area SR occupied by the rib portions on a surface of the composite member on a side at which the rib portions are formed to an area S of the surface is 5.0×10−3 or more and less than 8.0×10−2;
(4′) a ratio H/TI of the average height H of the rib portions to an average thickness TI of the composite member is 2.5 or more and 13 or less; and
(5′) a ratio Q of a length of at least one rib portion to a circumferential length of an outer edge of the composite member is 8% or more, and
wherein an intersection point of two rib portions of the plurality of rib portions is formed only on an upward facing part of the top of the surface of the composite member.