Process of making a glossy film
AssigneeRoehm GmbH
InventorsUwe Numrich, Klaus Hofmann, Peter Kaube, Horst Schmidt, Heinz Vetter
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Abstract
An impact resistant provided PMMA moulding material according to DE 195 44 563 is process into a surface-hardened film which is highly glossy, essentially free of gel bodies and can be processed in the “in-mould-film-decoration” method. The melted mass is generated by means of an extruder and fed to the inventive glazing rolls via a flexible lip nozzle, saild rolls being configured in order to generate an especially high locking pressure in the roll slit. The smoothing rolls are cambered. The films are used for decorating surfaces of high-value thermoplastic moulded parts.
Claims14
A method for manufacturing a film, comprising:
- melting a thermoplastic molding material, thereby obtaining a melt;
- feeding the melt to a roll gap between two glazing rolls;
- generating a locking force in said roll gap;
- shaping said melt in said roll gap to obtain a shaped melt;
- smoothening and cooling said shaped melt,
- thereby obtaining said film which is glossy on at least one side and which has a thickness in the range of 80 to 300 μm.
Dependencies are inferred from the claim text.