Self-adhesive material with a water-soluble protective layer

摘要

A face material is coated with a pressure sensitive adhesive which is in turn coated with a water soluble protective layer. The opposite printed side of the face material may be coated with hydrophobic lacquer. The adhesive is dried or cooled before the protective coating is applied. The protective layer is applied by extrusion or solution casting. Alternatively a reusable liner can be coated with the protective material and adhesive before the protected adhesive is transferred onto a face material. labels made from the material can be applied by passing them through water and guide rolls, and then between punching die and two way moving vacuum cylinder, and squeeze rolls