Method of manufacturing starch-based biodegradable molded objects
AssigneeNissei Kabushiki Kaisha
InventorsSadamasa Ando, Taizo Karasawa, Toshitaka Haruta, Akio Ozasa, Takayuki Kurisaka, Tsutomu Oowada, Shinji Tanaka
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Abstract
Using a metal mold (8) having an insulating section provided with vapor release sections, pressure outside the metal mold (8) is reduced, and heating is performed while releasing vapor produced thereby through the vapor release sections. This can prevent insulation breakdown caused by condensation of large amounts of vapor produced by materials during molding and heating of starch-based biodegradable molded objects by means of resistance heating, dielectric heating, etc.
Claims30
A method of manufacturing starch-based biodegradable molded objects by placing materials having biodegradability and including starch in a mold having first and second conductive mold halves and an insulating section therebetween, and applying across both said mold halves alternating current from an alternating current power source, thus heating and expanding said materials by means of resistance heating and/or dielectric heating, wherein:
- said insulating section of said mold is provided with a vapor release section;
- and
- pressure is reduced outside said mold, and said heating is performed while releasing vapor produced thereby through said vapor release section.
A method of manufacturing starch-based biodegradable molded objects by placing materials having biodegradability and including starch in a mold having first and second conductive mold halves and an insulating section therebetween, and applying across both said mold halves alternating current from an alternating current power source, thus heating and expanding the materials by means of resistance heating and/or dielectric heating, wherein:
- said insulating section of said mold is provided with a vapor release section;
- and
- said vapor release section is heated during heating of said materials, and heating of said materials is performed while releasing vapor produced thereby through said vapor release section.
Dependencies are inferred from the claim text.