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AssigneeNitto Boseki Co., Ltd.
InventorsShoichi Watanabe, Hirokazu Inoguchi, Yoshihiro Kanzaka, Yoshiharu Tanaka, Hideji Ikehara, Ryuji Saiki, Nobukatsu Yamato, Tomohiro Mori, Minoru Senna
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The present invention provides a molding sheet material having a sandwich structure produced by preparing a fiber reinforced thermoplastic resin layer (A) reinforced with a woven fabric or a knitted web and a fiber reinforced thermoplastic resin layer (B) reinforced with a random mat and using the layer (A) as a core layer and the layer (B) as a skin layer, or using the layer (B) as a core layer and the layer (A) as a skin layer. When this sheet material is molded into a three-dimensional structure, the layer (B) serves as a cushion to prevent the occurrence of a wrinkle or a crease in the layer (A). A toe puff for a safety shoe having a light weight and excellent pressing resistance can be prepared through the molding of this sheet material. In the sheet materials, the core layer or the skin layer consisting of a thermoplastic resin reinforced with a woven fabric or a knitted web of a reinforcing fiber may be prepared from a woven fabric or a knitted web of a reinforcing fiber alone.
A toe puff for a safety shoe produced by subjecting a molding sheet material to heat molding under pressure, the molding sheet material having a sandwich structure consisting of a core layer of a fiber reinforced thermoplastic resin reinforced with a woven fabric or a knitted web of a reinforcing fiber and, joined to both sides of the core layer, skin layers of a fiber reinforced thermoplastic resin reinforced with a random mat of a reinforcing fiber.
A toe puff for a safety shoe produced by subjecting a molding sheet material to heat molding under pressure, the molding sheet material having a sandwich structure consisting of a core layer of a fiber reinforced thermoplastic resin reinforced with a random mat of a reinforcing fiber and, joined to both sides of the core layer, skin layers of a fiber reinforced thermoplastic resin reinforced with a woven fabric or a knitted web of a reinforcing fiber.
A toe puff for a safety shoe produced by subjecting a molding sheet material to heat molding under pressure, the molding sheet material having a sandwich structure consisting of a core layer of a woven fabric or a knitted web of a reinforcing fiber and, joined to both side of the core layer, skin layers of a fiber reinforced thermoplastic resin reinforced with a random mat of a reinforcing fiber.
A toe puff for a safety shoe produced by subjecting a molding sheet material to heat molding under pressure, the molding sheet material having a sandwich structure consisting of a core layer of a fiber reinforced thermoplastic resin reinforced with a random mat of a reinforcing fiber and, joined to both sides of the core layer, skin layers of a woven fabric or a knitted web of a reinforcing fiber.
Dependencies are inferred from the claim text.