The bonding of the hot melt adhesive film may not be su […]
The bonding of the hot melt adhesive film may not be successful. There are also some special factors that cause the hot melt adhesive film to fail. If the incorrect hot melt adhesive film is selected, or the bonding material, area, environment, function, etc. Factors, it will lead to the failure of the hot melt adhesive film bonding.
We must pay attention to the strength of the hot melt adhesive film bonding. If the bonding is too strong, it will cause damage to the stickies, and if it is too weak, the bonding will not be strong.
The reasons for the improper selection of the bonding joint may be the use of the bonding joint without remedial measures, the long overlap length of the joint, the lack of consideration of the difference in the coefficient of linear expansion of different materials, the insufficient rigidity of the adherend, and the failure of the adhesive joint. The serious effect of uniform pull-off force, ignoring the strength of the bonded joint material, the unsealed edge of the end, the peeling force, the laminated material uses lap joints, and the parts with greater force use miter joints, etc. The reason is that the improper bonding process of the hot melt adhesive film also makes the bonding effect poor. For example, the amount of glue on the surface of the adherend is too much or too little, the bonding is unstable, the bonding time, etc., hot The process of adhesive film bonding is also different for the time of gluing. Some need to be glued for a period of time after gluing, and some need to be glued immediately.
The processing of hot melt adhesive film generally requires heating to a suitable temperature. Usually the softening temperature of hot melt adhesive film is above 80 degrees. When we heat to this temperature, the hot melt adhesive film begins to soften The fusion situation is gone.