Multi-layered molded articles
AssigneeAsahi-Dow Limited
InventorsAkio Yasuike, Hiroshi Kataoka, Norito Takao
Life of this patent
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Abstract
A multi-layered article molded according to the present invention has in its cross-section a triple-layered structure consisting of two surface layers and a core layer interposed between said surface layers, said triple-layered structure being injection molded in a single shot from two kinds of thermoplastic synthetic resins to be formed into the surface and core layers, respectively, said core layer having a thickness less than one half of the entire thickness of said article.
Claims13
A multi-layered molded article having the shape of a vessel, closed-end parison, disk or the like, said article comprising in its cross-section a triple-layered structure consisting of two surface layers of different thicknesses and a core layer interposed between said surface layers, said triple-layered structure having been injection molded in a mold cavity in a single shot from two different kinds of thermoplastic synthetic resin to form said surface and core layers, respectively, said core layer having a thickness less than one half of the entire thickness of said article, said triple-layered structure having its crosssection represented by
- a+b<1/2(a+b+c)
- where a is the thickness of the core layer, b is the thickness of the thinner surface layer and c is the thickness of the thicker surface layer.
Dependencies are inferred from the claim text.