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AssigneeAsahi Fiber Glass Company, Limited
InventorsToru Mizukami, Kengo Ozaki, Masahiko Tominaga, Yuji Yokoo
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A new process for producing a fiber-reinforced thermoplastic resin molded product with a high mechanical strength and no heat substantial deterioration of the resin, by an efficient heating without applying shear stress to the fiber-reinforced thermoplastic resin base material and a molded product, for example, a tiptoe core for a safety shoe produced by said process are provided. The fiber-reinforced thermoplastic resin base material P1 in a string form or a tape form is scattered and accumulated in a vessel such as tube 11, and a heating gas passed to the accumulated base material to melt heat, and preferably press by a plunger 15, the base material P1, whereby a molten mass P2 is formed, and then the molten mass P2 is dislocated to a mold to be press-mold. Said base material preferably satisfies the following formula: {fraction (1/100)}≦ρ1/ρ0≦½, wherein ρ0 means a density where said base material is scattered and accumulated and ρ0 means a true density of said base material.
A process for producing a fiber-reinforced thermoplastic resin molded product, which comprises a step of supplying a base material wherein a fiber-reinforced thermoplastic resin base material in a string form or in a tape form is scattered and accumulated, a step of forming a molten mass wherein a heating gas is passed through said base material accumulated to heat-melt it thereby to form a molten mass, and a molding step wherein said molten mass is supplied to a mold and then is press-molded to form a molded product.
A package of a fiber-reinforced thermoplastic resin base material for a forming material comprising an accumulated fiber-reinforced thermoplastic resin base material in a string form or in a tape form, wherein said base material is enclosed with a film of a thermoplastic resin.
A process for producing a fiber-reinforced thermoplastic resin molded product, which comprises applying a heating gas to a package of a fiber-reinforced thermoplastic resin base material for a forming material whereby an opening is formed in said package by melting the package, passing the heating gas through the opening to prepare a molten mass of said base material and supplying the resulting molten mass to a mold to press-mold, wherein the package comprises an accumulated fiber-reinforced thermoplastic resin base material in a string form or in a tape form, said base material is enclosed with a film of a thermoplastic resin.
Dependencies are inferred from the claim text.