MOLDED OBJECT AND METHOD OF MANUFACTURING SAME
A molded object includes: a first layer formed using a fiber-reinforced resin material including thermoplastic resin and strip-shaped reinforcement fiber bundles each composed of a plurality of reinforcement fibers aligned unidirectionally, the strip-shaped reinforcement fiber bundles being three-dimensionally and randomly stacked; and a second layer made of a fiber-reinforced resin material including thermoplastic resin and reinforcement fibers of filaments, and formed on at least one surface of the first layer.
1 . A molded object comprising:
a first layer formed using a fiber-reinforced resin material including thermoplastic resin and strip-shaped reinforcement fiber bundles each composed of a plurality of reinforcement fibers aligned unidirectionally, the strip-shaped reinforcement fiber bundles being three-dimensionally and randomly stacked; and
a second layer made of a fiber-reinforced resin material including thermoplastic resin and reinforcement fibers of filaments, and formed on at least one surface of the first layer.
2 . The molded object according to claim 1 ,
wherein the second layer is formed on both surfaces of the first layer.
3 . The molded object according to claim 1 ,
wherein the reinforcement fibers used in the second layer are in woven fabric form.
4 . The molded object according to claim 1 ,
wherein the strip-shaped reinforcement fiber bundles are each 5 mm or more and 500 mm or less in length.
5 . The molded object according to claim 1 ,
wherein the thermoplastic resin used in each of the first layer and the second layer is epoxy resin.
6 . The molded object according to claim 5 ,
wherein the thermoplastic resin is late-reactive thermoplastic resin.
7 . The molded object according to claim 1 ,
wherein the reinforcement fibers used in each of the first layer and the second layer are carbon fibers.
8 . A method of manufacturing a molded object, the method comprising:
forming a sheet-like object made of a fiber-reinforced resin material including thermoplastic resin and reinforcement fibers of filaments;
forming a stack object by three-dimensionally and randomly stacking a strip-shaped fiber-reinforced resin material including thermoplastic resin and reinforcement fiber bundles each composed of a plurality of reinforcement fibers aligned unidirectionally; and
heating and applying pressure to a layered object obtained by stacking the sheet-like object and the stack object.
9 . The method of manufacturing a molded object according to claim 8 ,
wherein the reinforcement fibers of filaments are in woven fabric form.