Quality requirements for label stickers with self-adhesive adhesive

1. Opaque multi-layer stickers, commonly used as opaque backing paper, are divided into yellow and white. According to structure, it can be divided into two types: pre coated PE coating and non PE coating. PE coating has two purposes. Firstly, seal the pores on the surface of the paper to make it smooth and smooth. Apply silicone oil to reduce the amount of coating and reduce costs; Another function is to improve the die-cutting characteristics, as the PE coating has a certain degree of toughness and elasticity, which can reduce the fracture of the backing paper.

2. Non adhesive transparent base paper, also known as gracinth base paper, can be divided into three types: yellow, white, and blue, also known as white gracinth, yellow gracinth, and blue gracinth. Currently, grazin paper (glass paper) is commonly used for label printing. There are two indicators that can affect the quality of die-cutting: one is uniform thickness, and the other is fiber layout. At the same time, the thickness uniformity of the base paper is the most important, especially when circular die-cutting, as the size of the die-cutting roller is determined by the thickness of the base paper. If the thickness of the backing paper is uneven, the blade will be cut or cut, causing trouble to the waste process.

3. Protective coatings are also crucial for the preservation time after printing. It can absorb some light that causes chemical reactions in the thermosensitive coating, slow down the deterioration of printing paper, and protect the thermosensitive components of the printing machine from damage. But if the protective coating is not uniform, it will not only greatly reduce the protection of the thermal sensitive coating, but also cause small particles of the protective coating to fall off during the printing process, causing friction with the thermal sensitive components of the printing machine and causing damage to the printing thermal sensitive components.

4. With the mixing of thermosensitive barcode label paper in the market, the country has not yet introduced national standards, and many users do not know how to identify the quality of stickers, providing convenience for many businesses to produce low-quality thermosensitive paper, causing losses to users. The lightweight thermal printing paper has a short storage time and blurry handwriting, causing serious damage to the printer.