Functionalisation through coating
INDIVIDUAL FILM PROPERTIES
The film must receive specific properties to meet all requirements on the market. This is also necessary to prevent film-specific properties such as static charges, clinging or fogging from hampering the finishing process. The challenge is to apply functional coats that achieve exactly the desired effect and improve the production and running properties:
The anti-blocking coat
Anti-blocking agents ensure that the films do not adhere to each other or the deep-drawing moulds. Deep-drawing trays can also be easier unstacked.
Application of antistatic agents
Charging of the film is counteracted through antistatic agents.
The anti-fogging coat
Anti-fogging agents minimize the fogging of the foil on the inner surface of packaging materials.
NON-CONTACTING LIQUID APPLICATION
The functional coats are applied with WEKO-Fluid-Application-System (WFA) through precision-metered non-contacting spray application. Compared with supplying respective additives to the masterbatch, this process saves valuable resources and provided flexibility. Coats such as anti-blocking, antistatic and/or anti-fogging agents are applied entirely as needed in minute amounts and reproducible at any time.
FILM NEEDS WEKO-FLOW UND WEKO-SIGMA
The WFA for the coating of film consists of the Liquid Supply Unit and System Controller WEKO-FLOW and the Rotor Carrier WEKO-SIGMA. Liquid is flung via rotors in non-contacting spray application on the film web.
- Precisely defined reproducible application quantity
- High long-term constancy of quantity and distribution
- Application of very diverse liquids
- Economic consumption of application medium
- Low energy consumption