In hot melt adhesives, wax is the most effective regulator of adhesive properties, whose main function is to lower the melting point and viscosity of hot melt adhesives, improve the fluidity and wettability of the adhesive, increase the bond strength, prevent hot melt adhesives from caking and reduce costs.
In polyurethane and polyamide hot-melt adhesives, no wax is added. Other hot-melt adhesives consist of certain waxes. However, if the amount is too much, the shrinkage of the adhesive becomes larger and the bonding strength decreases instead. Thus, the amount of wax should be controlled in order to obtain a greater bond strength.
1. Alkane paraffin wax
Its melting point is 50-70 ℃, and molecular weight is 280-560. Paraffin wax can be well used in corrugated board manufacturing, corrugated box forming, paper bag manufacturing and bookbinding for EVA-based hot melt adhesives and for adjusting curing times.
2. Microcrystalline paraffin wax
Its melting point is 65-105°C, molecular weight is 450-700, and its price is higher. Microcrystalline wax has improved flexibility, bond strength, thermal stability and cold resistance of hot melt adhesives over alkanes, but lower caking resistance than alkanes.
3. PE wax
Adhesive wax has good compatibility with hot melt adhesives such as ethylene/vinyl acetate copolymers. It has a high melting point and high hardness, which can reduce the viscosity of the adhesive composition.
4. Fischer-Tropsch wax
It has a linear molecular structure with high melting point and low permeability, narrow melting point range and good weather resistance. Therefore, Fischer-Tropsch wax is widely used in occasions requiring high weather resistance, temperature resistance and fast curing.
King Honor produces paraffin wax, Fischer-Tropsch (FT) synthetic paraffin wax and microcrystalline wax. Every order involves teamwork from sales, technicians, logistics and all involved. Our expertise makes things perfect. If necessary, you are welcome to consult us.