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Manufacturing Process

We produce approx. 12,000 tonnes of glassine and capacitor paper on 4 modern paper machines. Glassine papers as well as the static capacitor papers are highly refined and glazed papers. We therefore have different refining machineryand super calanders at our disposal. An exception to this are the electrolytic capacitor papers which are only lightly refined and not glazed. A typical production process in our company includes the following steps:

Pulping
The pulp we receive is mixed with water and then beaten in the pulper. A pumpable suspension results from this process which can be conveyed to the refining apparatus.
Refining/ Cleaning
In the refiners the mixture of pulp and water is refined by rotating discs or cones. During this process the fibres are shortened and split. The higher the grade of this refining, the more dense the paper on the paper machine becomes. Before the pulp suspension is conveyed to the headbox of the paper machine, it is rigorously thinned and screened to eliminate any tiny dirt particles.
Production of paper
The wire of the paper machine is coated through the headbox with the pulp suspension, after which dewatering takes place through the wire. The newly created paper then runs through press and drying rollers before being wound onto a core.
Calandering
The typical properties of the glassine (brightness, smoothness, transparency) or of the static capacitor paper only arise by calandering (super calandering). Here the paper is compressed through a series of fibre rollers by means of temperature and pressure.
Slitting
After calandering the paper is ready for converting on the winding machines. Now the material is cutinto different widths and diameters according to customers' requirements.