To the independent branch, and its peeling force.
Characteristics of drying and permanent viscosity.
There are many kinds of pressure-sensitive adhesives, which are introduced as follows:
One: According to its nature and dispersion medium, it can be divided into water-soluble pressure-sensitive adhesive, solvent-based pressure-sensitive adhesive, emulsion pressure-sensitive adhesive and hot-melt pressure-sensitive adhesive.
Pressure-sensitive adhesives and calendered pressure-sensitive adhesives, among which water-soluble pressure-sensitive adhesives, hot-melt pressure-sensitive adhesives and solvent-based pressure-sensitive adhesives are the mainstream pressure-sensitive adhesives on the market at present.
Among the adhesive products, hot melt pressure sensitive adhesive is a newly developed variety.
Two: according to the composition structure, it can be divided into two categories: rubber type and resin type, and rubber type can be divided into natural rubber, synthetic rubber and resin.
It can be divided into polyurethane, polyacrylate and silicone.
The main component of rubber-based pressure-sensitive adhesive is rubber, and thickening resin, plasticizer and other components are added.
In addition to the main component resin, defoamer and wetting agent must be added to the photosensitive adhesive.
Brief introduction of resin pressure sensitive adhesive;
1: Among them, resin polyacrylate is the most widely used at present, and its output exceeds that of natural rubber pressure-sensitive adhesive.
2. silicone and other resin pressure-sensitive adhesives are pressure-sensitive adhesives composed of silicone resin and silicone rubber.
With high temperature resistance and aging resistance, it is a very important special pressure sensitive adhesive.
Brief introduction of rubber pressure sensitive adhesive;
1: Rubber pressure sensitive adhesive is also called elastic pressure sensitive adhesive. The elastomer used in this pressure-sensitive adhesive was natural rubber at the earliest.
Later, it gradually extended to all kinds of synthetic rubber and thermoplastic elastomer, so this kind of pressure-sensitive adhesive is called natural rubber pressure-sensitive adhesive, which is synthetic.
Rubber pressure sensitive adhesive, thermoplastic elastic pressure sensitive adhesive.
2. Thermoplastic elastomer pressure-sensitive adhesive will not cause environmental pollution and has high production efficiency because no solvent is used.
In modern society, the voice of eliminating environmental pollution is very high and has high promotion value.
3. The pressure-sensitive adhesive made of synthetic rubber and reclaimed rubber has a certain market sales because of its low price.
4. Natural rubber, which was developed earlier, still has a large output in pressure-sensitive adhesive, and its quality is good, which is almost acceptable.
Make various types of pressure-sensitive adhesive products.
Third, according to whether the main components are crosslinked or not, pressure-sensitive adhesives can be divided into two categories: crosslinked and non-crosslinked. Cross-linked pressure sensitive adhesive is cross-linked according to it.
These methods can be divided into room temperature crosslinking, heating crosslinking and photo crosslinking. Among them, cross-linked pressure-sensitive adhesive has the best bonding strength and is more suitable.
Co-manufacture permanent pressure-sensitive labels.
With the demand of society and production and the requirement of high speed and high efficiency of assembly line production, social environmental protection is very important to eliminate pollution in production.
Requirements, more uniform coating requirements, hot melt pressure sensitive adhesive was born, hot melt pressure sensitive adhesive has the advantages of hot melt adhesive and pressure sensitive adhesive,
Compared with solvent-based and water-based pressure-sensitive adhesives, it is easy to use and operate, and the production process and even the coating process are pollution-free, so it is an ideal pressure-sensitive adhesive.
The demand for upgrading products is very strong now.