Laminated and molded body and manufacturing method therefor
AssigneeYoshino Kogyosho Co., Ltd.
InventorsYoshio AKIYAMA, Shinichi ISHIYAMA
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Abstract
A laminated and molded body obtained by coextruding and molding at least two kinds of resin materials is preferable as a blow-molding aimed preform, a direct-blow molded bottle, a tube, or a blow molded tube, and has at least one layer constituted of a colored layer having a thickness continuously or intermittently varied in a direction parallel to the extruding direction of the at least one layer and/or in another direction intersecting the extruding direction, thereby enhancing the gradation effect.
Claims5
A manufacturing method of forming a laminated and molded body by coextruding at least two kinds of resin materials, said method comprising:
- extruding a colored layer as at least one layer of said laminated and molded body from a first kind of resin material;
- controlling an extruding amount of the resin material of said colored layer such that said colored layer has a thickness continuously varied in a predetermined direction with respect to the extruding direction of the resin material of said colored layer;
- controlling an extruding amount of a second kind of resin material forming at least one layer other than said colored layer such that the full thickness of said laminated and molded body is substantially constant along said predetermined direction;
- and
- controlling the extruding amount of the resin material of said colored layer such that said colored layer has a thickness varied within a range of 50% of the full thickness of said laminated and molded body.
Dependencies are inferred from the claim text.