Composition of pressure sensitive adhesive

Adhesive tape is a special type of adhesive, which is coated on the substrate and processed into strips, and made into coils. It includes solvent-activated adhesive tape, heating adhesive tape, and pressure sensitive adhesive tape. For example, medical daily use of rubber paste and electrical insulation adhesive is a pressure sensitive adhesive tape.

Composition of pressure sensitive adhesive tape:

1. pressure sensitive adhesive
2. Substrate
3. Bottom treatment agent
4. the back treatment agent
5. Isolation paper

The main components of pressure sensitive adhesive include rubber types and resin types, such as polyacrylate or polyvinyl ether two classes, the base material requirements are uniform, have small scalability, and have good solvent wettability.

Include:

• (1) fabrics such as cotton, glass cloth, or non-woven fabrics.
• (2) Plastic films such as PE, PP, PVC, and mylar film.
• (3) Paper such as kraft paper, glass transparent paper, etc., the base material raw degree between 0.1-0.5mm.

The role of the underlying treatment agent is to increase the adhesive strength between the adhesive and the substrate so that the adhesive tape will not cause the adhesive and the substrate to disengage and stain the adhesive surface and make the adhesive tape reuse. The common base treatment agent is chloroprene rubber, modified chlorinated rubber, partially vulcanized with isocyanate.

The back primer is generally prepared from polyacrylate, PVC, cellulose derivatives, or organosilicon compounds. It can act as an isolation agent. Double-sided adhesive tape should be added with a layer of isolation paper such as semi-hard PVC film, PP film, or kraft paper.