Definition of pressure sensitive adhesives

Composition of thermoplastic elastomer pressure sensitive adhesive:

A thermoplastic elastomer is a new type of synthetic rubber developed after 1963. It has the stay solubility and hot workability of thermoplastic plastics. It has the elasticity of vulcanized rubber at room temperature without chemical crosslinking. Therefore, it is also called the third-generation rubber. A typical thermoplastic elastomer is an A-B-A block copolymer, which is made of styrene (St), diolefin (D), and styrene (St) terpolymer, referred to as SDS.

Specific varieties of SBS and SIS, its unique structure makes it can be in some organic solvents without plasticizing, at the same time at high temperatures, and have low melting viscosity. Pressure sensitive adhesives with different properties were prepared by adding components with different compatibility with polystyrene (PS), polybutadiene (PB), and polyisoprene (PI). Due to unsaturated bonds in PB and PI segments, it can also be modified by grafting copolymerization. Thermoplastic elastomer pressure sensitive adhesives are mainly solvents. Thermoplastic elastomer pressure sensitive adhesives are composed of SBS, SIS, viscosifying resin, softener, antioxidant, colorant, and so on. Only when the allocation of each group is appropriate, can the pressure sensitive adhesives with excellent performance be prepared.

Definition of pressure sensitive adhesive

There are more than ten interpretations of the meaning of pressure sensitive adhesive and pressure sensitive adhesive products, the most common definition is as follows:

Definition

• 1: Using finger energy pressure can make the adhesive immediately adhere to any adhesion object’s smooth surface. At the same time, if the damage is the adhesive surface, the adhesive does not pollute the surface of the adhesive, this type of adhesive is called pressure sensitive adhesive. Its bonding process is very sensitive to pressure, so it is called pressure sensitive. Pressure sensitive adhesives are  generally not directly used to bond the adhesive. Pressure sensitive adhesives are made of various materials (tape and adhesive labels).
• 2: (pressure sensitive adhesives) Academic definition: pressure sensitive adhesive is a viscoelastic body with viscous properties of liquid and elastic properties of solid; This kind of viscoelastic body has the influence factors and properties of both the contact process and the failure process of bonding.