Back to results
US 9,822,228 B2Granted
Prepreg and carbon fiber reinforced composite materials
AssigneeToray Industries, Inc.
InventorsNobuyuki Arai, Norimitsu Natsume, Kenichi Yoshioka, Junko Kawasaki, Hiroshi Takezaki
Life of this patent
Estimating the term…
Abstract
A prepreg containing a carbon fiber [A] and a thermosetting resin [B], and in addition, satisfying at least one of the following (1) and (2). (1) a thermoplastic resin particle or fiber [C] and a conductive particle or fiber [D] are contained, and weight ratio expressed by [compounding amount of [C] (parts by weight)]/[compounding amount of [D] (parts by weight)] is 1 to 1000. (2) a conductive particle or fiber of which thermoplastic resin nucleus or core is coated with a conductive substance [E] is contained.
Claims10
A carbon fiber reinforced composite material manufactured by curing a prepreg containing:
- a thermosetting resin [B],
- carbon fibers [A] impregnated with the thermosetting resin [B],
- conductive particles [E] included in the thermosetting resin [B], and
- a conductive filler having smaller average diameter than the average diameter of the conductive particles [E],
- wherein the conductive particles [E] localize around a surface portion of the prepreg,
- wherein, the conductive filler is mixed in the thermosetting resin [B],
- wherein, the conductive particles [E] have a spherical shape and have a thermoplastic resin nucleus coated with a conductive substance to form a conductive coating layer on the surface of the nucleus, wherein the conductive coating layer is an aggregate of conductive fiber, carbon black or a metallic fine particles, and
- wherein strain an energy release rate of the thermoplastic resin of the conductive particles [E] determined, by compact tension method defined in ASTM D 5045-96 by using a resin plate made of the press-molded thermoplastic resin is 1500 to 50000 J/m2, and a volume ratio of the conductive particles [E] expressed by [volume of nucleus]/[volume of conductive coating layer] is 0.1 to 500, and
- the conductive particles [E], having thermoplastic resin nuclei coated with a conductive substance, are localized between two layers formed by the carbon fibers [A], and the conductive particles [E] form a conductive path between the two layers formed by the carbon fibers [A] of the carbon fiber reinforced composite material.
6 more elements
A carbon fiber reinforced composite material manufactured by curing a prepreg containing:
- a thermosetting resin [B],
- carbon fibers [A] impregnated with the thermosetting resin [B],
- conductive particles [E] included in the thermosetting resin [B], and
- a conductive filler having smaller average diameter than the average diameter of the conductive particles [E],
- wherein the conductive particles [E] localize around a surface portion of the prepreg,
- wherein, the conductive filler is mixed in the thermosetting resin [B],
- wherein, the conductive particles [E] have a spherical shape and have a thermoplastic resin nucleus coated with a conductive substance to form a conductive coating layer on the surface of the nucleus, wherein the conductive layer is an aggregate of fibrous or particulate conductive substances, and
- wherein strain an energy release rate of the thermoplastic resin of the conductive particles [E] determined, by compact tension method defined in ASTM D 5045-96 by using a resin plate made of the press-molded thermoplastic resin is 1500 to 50000 J/m2, and a volume ratio of the conductive particles [E] expressed by [volume of nucleus]/[volume of conductive coating layer] is 0.1 to 500, and
- the conductive particles [E], having thermoplastic resin nuclei coated with a conductive substance, are localized between two layers formed by the carbon fibers [A], and the conductive particles [E] form a conductive path between the two layers formed by the carbon fibers [A] of the carbon fiber reinforced composite material.
6 more elements
A prepreg for making a carbon fiber composite material in a thickness direction formed by molding and curing the two or more prepregs, wherein the prepreg containing:
- a thermosetting resin [B],
- carbon fibers [A] impregnated with the thermosetting resin [B],
- conductive particles [E] included in the thermosetting resin [B], and
- a conductive filler having smaller average diameter than the average diameter of the conductive particles [E],
- wherein the conductive particles [E] localize around a surface portion of the prepreg,
- wherein, the conductive filler is mixed in the thermosetting resin [B],
- wherein, the conductive particles [E] have a spherical shape and have a thermoplastic resin nucleus coated with a conductive substance to form a conductive coating layer on the surface of the nucleus, wherein the conductive coating layer is an aggregate of conductive fiber, carbon black or a metallic fine particles, and
- wherein strain an energy release rate of the thermoplastic resin of the conductive particles [E] determined, by compact tension method defined in ASTM D 5045-96 by using a resin plate made of the press-molded thermoplastic resin is 1500 to 50000 J/m2, and a volume ratio of the conductive particles [E] expressed by [volume of nucleus]/[volume of conductive coating layer] is 0.1 to 500.
5 more elements
A prepreg for making a carbon fiber composite material in a thickness direction formed by molding and curing the two or more prepregs, wherein the prepreg containing:
- a thermosetting resin [B],
- carbon fibers [A] impregnated with the thermosetting resin [B],
- conductive particles [E] included in the thermosetting resin [B], and
- a conductive filler having smaller average diameter than the average diameter of the conductive particles [E],
- wherein the conductive particles [E] localize around a surface portion of the prepreg,
- wherein, the conductive filler is mixed in the thermosetting resin [B],
- wherein, the conductive particles [E] have a spherical shape and have a thermoplastic resin nucleus coated with a conductive substance to form a conductive coating layer on the surface of the nucleus, wherein the conductive coating layer is an aggregate of fibrous or particulate conductive substances, and
- wherein strain an energy release rate of the thermoplastic resin of the conductive particles [E] determined, by compact tension method defined in ASTM D 5045-96 by using a resin plate made of the press-molded thermoplastic resin is 1500 to 50000 J/m2, and a volume ratio of the conductive particles [E] expressed by [volume of nucleus]/[volume of conductive coating layer] is 0.1 to 500.
5 more elements
Dependencies are inferred from the claim text.