| 摘要 |
PURPOSE:To produce precisely and inexpensively, by a method wherein a foaming or sintering resin material which is hard to be impregnated with a casting monomer, prepolymer or a mixture of them is made into a gasket and after both end surfaces of a cell set are sealed, the casting material is cast and solidified. CONSTITUTION:A gasket 3 made of foamed polyethylene is placed between two panes of glass 2, 2, a gap (d) between both the panes of glass are made into a cell set 1 having a polymerization chamber 4 and fixed by clampes 5, 5. Then predeaerated sirup R of methyl metacrylate is cast within the polymerization chamber 4 and after a temperature rise gradually from a room temperature, the same is cooled down gradually to the room temperature, finally the cell set is dismembered, a cured thin plate is taken out, removal and grinding are performed and then acrylic thin plate is obtained. Production can be performed precisely and inexpensively by this method. |
