| CPC B29C 53/602 (2013.01) [B29C 70/16 (2013.01); B29K 2101/10 (2013.01); B29K 2105/0872 (2013.01); B29K 2105/251 (2013.01); B29L 2031/7156 (2013.01)] | 4 Claims |
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1. A method for manufacturing a high-pressure tank, the high-pressure tank including a first reinforcing layer made of a fiber reinforced resin and a second reinforcing layer made of a fiber reinforced resin and covering the first reinforcing layer, the method comprising:
preparing a cylinder member by forming a cylindrical winding body by winding a continuous fiber impregnated with a first thermosetting resin in a circumferential direction, and thermally curing the first thermosetting resin in the winding body;
preparing a joined member corresponding to the first reinforcing layer by joining a pair of dome members to both end portions of the cylinder member; and
forming the second reinforcing layer by helically winding a fiber bundle impregnated with a second thermosetting resin around the joined member over the dome members and thermally curing the second thermosetting resin in the wound fiber bundle,
wherein a thermosetting resin containing a main agent and a granular solid curing agent is used as the first thermosetting resin, the main agent including a resin precursor of the first thermosetting resin and the solid curing agent chemically bonding molecules of the resin precursor together,
wherein a particle size of the solid curing agent is larger than a gap between the continuous fibers,
wherein a surface layer having a lower ratio of the solid curing agent to the main agent than a portion other than a surface of the winding body is formed by causing the main agent to ooze from between the continuous fibers onto the surface of the winding body by heating the first thermosetting resin, and
wherein the particle size of the solid curing agent is at least 20 μm.
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