Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Reexamination Certificate
2003-03-12
2011-10-25
Del Sole, Joseph (Department: 1743)
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
C264S053000, C264S319000, C264S554000
Reexamination Certificate
active
08043539
ABSTRACT:
Using a metal mold (20a) consisting of a convex mold part (21a) and a concave mold part (22a), a molding material (14) is placed between a pair of coating films (12), and after clamping, the molding material (14) and the coating film (12) are heated and molded to make a biodegradable expanded molded article, and at the same time, the coating film (12) is softened and pressure-bonded to a surface of the biodegradable expanded molded article. An exhaust hole (31a) and (32a) are provided on the convex mold part (21a) and the concave mold part (22a), respectively. At the time of heating and molding, gaseous matter existing between the coating film (12) and a surface of the metal mold (20a) is discharged out of the metal mold (20a) through the exhaust holes (31a) and (32a). Accordingly, it is possible to provide a method and a mold to manufacture a biodegradable expanded molded article easily and with excellent accuracy of dimension, having enough strength, enough water resistance, very excellent biodegradability and excellent surface smoothness even if the biodegradable molded article has a complicated shape.
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Hashimoto Akihisa
Ozasa Akio
Shingu Takeshi
Shinohara Rumi
Tanaka Shinji
Bodawala Dimple
Del Sole Joseph
Harness & Dickey & Pierce P.L.C.
Nissei Company, Ltd.
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