Self-adhesive, also called self-adhesive sticker material, is a composite material that uses paper, film, or special materials as the fabric, coated with adhesive on the back, and coated with silicon protective paper as the backing paper. Adhesive is one of the important features of stamps. The world's first stamp "Black Penny" was painted with adhesive. The difference is that the two materials are different, the stickers are suitable for surface light, and the adhesive is only used and pasted. In the analogy of the image, the sticker is actually transparent glue, except that the surface is printed with graphics. The adhesive is actually a double-sided tape, which is used to bond two products that are not bonded together.
Features of stickers
Small investment and quick results. Self-adhesive prints are mostly trademarks and stickers, which have a smaller format, fast printing speed, and less production waste.
Flexible printing. Stickers are not restricted by printing methods, and traditional printing houses can use offset or screen printing machines to print.
Many functions, stickers are widely used in food, cosmetics and bar codes, etc., can also be used as electronic products, machinery products and other special environment signs.
Classification of stickers
There are two types of self-adhesive labels: one is a paper sticker, and the other is a film sticker.
1. Paper stickers are mainly used for liquid washing products and popular personal care products; film materials are mainly used for high-end daily chemical products. At present, popular personal care products and household liquid washing products in the market occupy a large proportion, so corresponding paper materials are used more.
2. PE, PP, PVC and other synthetic materials are commonly used for film stickers. The film materials are mainly white, matte and transparent.
Because film materials have poor printability, they are generally treated with corona treatment or by adding a coating on their surface to enhance their printability. In order to prevent some film materials from deforming or tearing during the printing and labeling process, some materials are also subjected to directional treatment and unidirectional stretching or biaxial stretching. For example, the application of BOPP materials after biaxial stretching is quite common.