At the pilot coater, a 1 to 1.3-µm-thin layer is applied to the backing material and then dried in an air-flotation dryer at 100° to 180 °C – depending on the material properties – for 1.2 to 18 seconds. Here, the WACKER experts simulate the customer’s industrial processing conditions exactly.
The subsequent use of the release liner is also of great importance. In industrial labeling, a machine applies up to five labels per second to packaging – such as a shampoo bottle. The skill of the laminate manufacturer now lies in finding a compromise in the release force between the label and the release liner so that both matrix peeling and labeling run smoothly.
Double-sided adhesive tape poses another challenge for laminate manufacturers. The release liner must feature two different release forces for the two sides, so that the adhesive tape peels off of the underside of the release liner first. This allows the double-sided adhesive tape to cleanly peel off for further processing.