What kinds of self-adhesive label materials are there?

There are many coating processes of stickers, which lead to different grades of self-adhesive materials. At present, the development direction is from traditional roll coating, blade coating to high-pressure tape casting coating, to ensure the uniformity and sensitivity of coating to the greatest extent, to avoid bubbles and pinholes and to ensure the coating quality. However, the casting coating technology is not mature in China, and the traditional roller coating method is mainly used in China. In recent years, due to the development of offset printing technology, offset printing is also used for self-adhesive printing. It is necessary to make films and plates before printing. Release paper, commonly known as "backing paper", has a non-stick surface and low surface energy. The backing paper can isolate the adhesive, so as an accessory of the tissue paper, the tissue paper can be easily peeled off from the backing paper. Commonly used are white, blue and yellow cellophane or onion paper, kraft paper, polyester (PET), coated paper and polyethylene (PE).