MANUFACTURE OF PLASTIC MOLDED FORM HAVING SCRATCH-RESISTANT COATING
PURPOSE: To manufacture a continuous strip material having a scratch resistant surface by continuously forming a molding material in the strip material by using a calender, and coating the surface of a calender roller with a material adapted to the scratch resistant coating formation in this case. C...
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Zusammenfassung: | PURPOSE: To manufacture a continuous strip material having a scratch resistant surface by continuously forming a molding material in the strip material by using a calender, and coating the surface of a calender roller with a material adapted to the scratch resistant coating formation in this case. CONSTITUTION: A strip plastic is manufactured by the steps of extruding a thermoplastic molding material to a flat strip material by a slit die, subsequently rolling the strip material by a calender, passing the strip material through the calender at least twice via a calibrated roller gap, and cooling it in this case. At that time, the surface of the roller is coated with a liquid mixture containing a radical polymerizable monomer having a polymerizable double bond and a radical forming initiator for forming a radical by an operation of an ultraviolet ray at a temperature between a roller surface temperature and a temperature of the thermoplastic molding material as a material adapted to form the coating. Thus, in the case of bringing the molding material into contact with the roller, an excellent scratch resistant surface layer cured in the case of adhesively bonding with it and cooling it is generated. |
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