Knife full coating：the glue coming out from the coating head,then go on to the material,the coating head contacted the material.it can have best even and smooth glue on materials
This method is more suitable for self adhesive materials such as label, adhesive tapes and so on.
 
Roller coating: first coat hot melt on roller,then transfer the hot melt to paper,then laminate with other materials
Spraying: spray the hot melt on paper,then laminate with other material
Slot die coating ：the glue coming out from the coating head, the glue flow to the material, there is a distance between the coating head and material.coating head doesn’t contact material.
The glue on materials is not so even and uniformity is not so good. This method is more suitable for garments and clothes.