MANUFACTURE OF MICROWAVE OVEN

摘要

PURPOSE:To enhance the safety of a tray for a microwave oven by arranging the fluorine gas treated surface formed to the surface of a polyolefinic resin layer on the inside. CONSTITUTION:Fluorine gas is sprayed to the surface of the polyolefinic resin of a sheet 20 made of a synthetic resin having a polyolefinic resin layer 21 on one side thereof to form a fluorine gas treated surface 22. Subsequently, the sheet 20 is thermally molded so that the fluorine gas treated surface 22 faces inside to obtain a desired tray 10 for a microwave oven.