What are the main components of A4 stickers?

The main components of A4 adhesive mainly include the following parts:

1、 Surface material (surface material)

Paper material: A4 stickers usually use high-quality paper as the base, which may include copperplate paper, glass cardboard, etc. They have high water resistance, heat resistance, and cold resistance, and can meet the needs of different environmental conditions.

Plastic materials: In addition to paper, the surface material of A4 stickers may also include plastics such as polyester (PET film), polyethylene, polypropylene, etc. These plastic materials also have good water resistance, heat resistance, and oil resistance, making them suitable for label applications that require higher durability.

2、 Adhesive (glue)

Type: A4 self-adhesive adhesive is usually made of hot melt adhesive, pressure-sensitive adhesive, and other types. These adhesives can firmly adhere paper (or plastic) substrates to various surfaces, forming stable labels.

Characteristics: The type and quality of adhesive directly affect the viscosity and adhesion of A4 stickers. Different types of adhesives have different viscosities, curing times, and temperature resistance, so they need to be selected according to specific application requirements.

3、 Bottom paper

Function: The backing paper is a paper material that is pasted on the back of A4 adhesive to protect the adhesive components from leaking out. It usually has the characteristics of easy tearing and strong tensile strength to ensure that the label can be easily peeled off during use without affecting the performance of the adhesive label and its adhesive.

4、 Other ingredients (optional)

Back coating agent: In order to improve the adhesion and stability of the adhesive, A4 stickers are sometimes coated with back coating agent on the surface material or base paper. These back coating agents are usually chemical substances that can interact with adhesives to enhance the adhesive effect of labels.

Protective coating: In order to extend the service life of A4 stickers, prevent contamination and wear, sometimes a layer of protective coating is applied to their surface. This coating can increase the wear resistance, weather resistance, and pollution resistance of the label.

In summary, the main components of A4 adhesive include surface material (paper or plastic), adhesive (glue), backing paper, and other optional ingredients (such as backing coat and protective coating). These components together form the complete structure of A4 adhesive, enabling it to meet the needs of various label applications.