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公开(公告)号：US10428894B2
公开(公告)日：2019-10-01
申请号：US15116582
申请日：2015-02-05
Applicant: Teijin Limited
Inventor： Shuhei Onoue , Tadashi Yamaji , Keizo Yokoyama , Kohei Oka
Abstract: Provided is a resin-made impact absorption member including: an impact absorption portion which includes a fiber-reinforced resin material containing reinforcing fibers and a thermoplastic resin and has a hollow structure including an outer cylindrical portion and a hollow portion, in which the reinforcing fiber has an average fiber length of 1 mm to 100 mm, the thermoplastic resin has a fracture elongation of 10% or more, the fiber-reinforced resin material has a compressive elastic modulus of 10 GPa or more and a compressive strength of 150 MPa to 500 MPa, and in the impact absorption portion, a maximum value of a ratio L1/t1 of a distance L1 from a position of the center of gravity to the outer cylindrical portion on a same section in a sectional shape in a direction orthogonal to an impact absorption direction, to a thickness t1 of the outer cylindrical portion, is 40 or less.
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公开(公告)号：US12251893B2
公开(公告)日：2025-03-18
申请号：US17484190
申请日：2021-09-24
Applicant: Teijin Limited
Inventor： Keizo Yokoyama
IPC: B29C70/48 , B29C70/54 , B29K101/12 , B29K307/04 , B29K309/08
Abstract: The present invention provides a method for manufacturing a press-molded body, the method having a step for disposing an X material inside a mold, a step for closing the mold and extruding a Y material, which is a kneaded material, into the mold after pressure has begun to be applied to part of the X material, and a step for cold-pressing and integrally molding the X material and the Y material inside the mold, wherein: the X material includes reinforcing fibers FA, having a weight-average fiber length LwA, and a thermoplastic resin RX; the Y material includes reinforcing fibers FB, having a weight-average fiber length LwB, and a thermoplastic resin RY; LwB t2.
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公开(公告)号：US20220009180A1
公开(公告)日：2022-01-13
申请号：US17484190
申请日：2021-09-24
Applicant: Teijin Limited
Inventor： Keizo Yokoyama
Abstract: The present invention provides a method for manufacturing a press-molded body, the method having a step for disposing an X material inside a mold, a step for closing the mold and extruding a Y material, which is a kneaded material, into the mold after pressure has begun to be applied to part of the X material, and a step for cold-pressing and integrally molding the X material and the Y material inside the mold, wherein: the X material includes reinforcing fibers FA, having a weight-average fiber length LwA, and a thermoplastic resin RX; the Y material includes reinforcing fibers FB, having a weight-average fiber length LwB, and a thermoplastic resin RY; LwB t2.
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公开(公告)号：US20220009179A1
公开(公告)日：2022-01-13
申请号：US17484082
申请日：2021-09-24
Applicant: Teijin Limited
Inventor： Keizo Yokoyama
Abstract: The present invention provides a method for producing a press-molded body, the method having: a step for placing a material X in a mold, a step for closing the mold and injecting a material Y, which is a kneaded material, into the mold after pressure has begun to be applied to part of the material X; and a step for cold-pressing the material X and the material Y in the mold to integrally mold these materials, wherein the material X is cut from a composite material M that includes reinforcing fibers FA having a weight-average fiber length LwA and a thermoplastic resin RX, the material Y includes carbon fibers B having a weight-average fiber length LwB and a thermoplastic resin RY, LwB
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