To introduce the bonding principle of hot melt adhesive […]
To introduce the bonding principle of hot melt adhesive film and how to achieve good bonding effect, including the selection of suitable hot melt adhesive film and how to surface treatment of the material.
1, mechanical combination
The adhesion of the hot melt adhesive film to the adherend is a mechanical bond. After the adhesive surface is coated with the adhesive, the hot melt adhesive film penetrates into the pores of the adherend and is dried and solidified to generate a frictional force between the hot melt adhesive film and the adherend, thereby increasing the bonding force between each other.
2, mutual diffusion
The bonding between the polymer compounds is due to the diffusion of the macromolecule itself or its segments by thermal motion, which is essentially the mutual dissolution of the interface, thereby forming the hot melt adhesive film and the adherend molecules intertwined to form A strong bond. The diffusion rate is related to temperature and pressure.
3. Chemical reaction
A chemical crosslinking reaction occurs between the hot melt adhesive film and the interface of the adherend, and the cross-linking reaction has hydrogen bonding, coordination bonding, and covalent bonding.
Hot melt adhesives are classified into rubber blocks, glue sticks, adhesive films, rubber powders, etc. according to the shape of the product. Our company specializes in film products, can produce matching film forms according to customer needs, and customize product specifications. The weight range is 15-150g/m2 and the width is 6mm-1520mm.