METHOD OF CASTING AND PRODUCING ATH FILLED ACRYLIC OR POLYMETHACRYLATE BASED MOLDED ARTICLES BY USING PROTECTING POLYETHYLENE FOIL IN THE MOLD

摘要

The invention is about casting forms by "polymerization in the mould" from acrylic or polymethacrylate based, ATH (aluminiumtrihydroxide) filled mixtures by using protective polyethylene foil in mould. During the moulding where silicon mould (5) is used, in order to avoid the ATH (aluminiumtrihydroxide) filled, acrylic or polymethacrylate based mixture (8) to stick chemically to the male mould part (2) where the usage surface of the product (9) is formed; a protecting polyethylene foil (3) has been used which is replaced over the male mould part (2), and by this way the filled mixture is poured to the mould (8) will not be able to give damage to silicon mould (5) during polymerization. The used foil (3) is carried over a thin, acrylic sheet (4). After the polyethylene foil (3) is covered over acrylic sheet (4) in order to get in contact with the material poured, these two elements, by using heat and vacuum (thermoform process), will put over the male mould (2) like a hat or cover and is to be shaped in the same form of the male mould (2).