The basic structure of the adhesive material and the function of each part

The basic structure of the adhesive material and the function of each part. The structure of the self-adhesive material is composed of three parts: surface material, adhesive and backing paper. However, from the point of view of manufacturing process and quality assurance, the self-adhesive material consists of seven parts:

1, surface coating

Used to change the surface properties of the face material. Such as improving the surface tension, changing the color, adding a protective layer, etc., to make it more acceptable ink and easy to print, to prevent dirt, increase the adhesion of ink and to prevent the printing of graphics off. Surface coating is mainly used for non-absorbent materials, such as aluminum foil, aluminized paper and various film materials.

2. The surface material is the surface material, and it is the material that accepts the printed graphic on the front side, accepts the adhesive on the back side, and is finally applied to the attached article.

In general, any flexible deformable material can be used as a self-adhesive material fabric, such as commonly used paper, film, composite foil, all kinds of textiles, thin metal sheet and rubber and so on. The type of face material depends on the final application and the printing process. Surface materials should be able to adapt to printing and printing, have a good ink, and have enough strength to accept a variety of processing, such as die cutting, waste, slitting, punching and labeling.

3, coating

The same as the surface coating, it is just coated on the back of the face material. The main purpose of the coating is:

(1) Protect surface material to prevent adhesive penetration.

(2) increase the opacity of the fabric;

(3) increase the adhesive force between the adhesive and the surface material;

(4) Prevent the plasticizer in the plastic surface material from penetrating into the adhesive, affecting its adhesive properties, resulting in a decrease in the adhesive force of the label and the label falling off.

4, adhesive

The adhesive is the medium between the label material and the bonding substrate and acts as a bonding agent. According to their characteristics can be divided into two kinds of permanent and removable. It has a variety of recipes for different face materials and different occasions. Adhesives are the most important ingredient in adhesive material technology and are key to the application of labeling technology.

5, release coating (silicon coating layer) that is coated on the bottom surface of the silicone oil layer, the coating of silicone oil can make the bottom surface of the paper surface tension is very low, very smooth surface, the role is to prevent the adhesive bond in the bottom paper on.

6, bottom paper

The role of the bottom paper is to receive the release agent coating, protect the adhesive on the back of the face material, support the face material, enable it to die cut, waste and labeling on the labeling machine.

7, back or back

Back coating is a protective coating on the back of the backing paper to prevent waste, and the adhesive around the rewinded label is attached to the backing paper. Another role is to make multilayer labels. The back printing function is to print the registered trademark or pattern of the manufacturer on the back side of the backing paper, which serves as a propaganda and anti-counterfeiting effect.

There are five types of self-adhesive materials:

Classified by adhesive properties, can be divided into permanent adhesive materials and removable adhesive materials;

Classified by adhesive coating technology, can be divided into hot-melt adhesive materials, solvent-based adhesive materials and emulsion-type adhesive materials; (not very understand)

According to the classification of adhesives and chemical properties, it is divided into rubber-based and acrylic adhesive materials;

Classified according to the characteristics of the bottom paper, it is divided into opaque bottom paper, translucent bottom paper and transparent bottom paper three kinds of self-adhesive materials;

Classified according to the characteristics of surface materials, divided into paper stickers, film stickers and special stickers.