What kind of hot melt adhesive film has the strongest bonding strength?

What kind of hot melt adhesive film has the strongest bonding strength?
Hot melt adhesives are recognized as environmentally friendly adhesives. Of course, hot melt adhesive film products made from hot melt adhesives are also environmentally friendly. This is why hot melt adhesive films are getting more and more attention today.

Hot melt adhesive film can be divided into many types according to the material of the raw material. The more common ones are EVA hot melt adhesive film, TPU hot melt adhesive film, PA hot melt adhesive film, PES hot melt adhesive film, and PO hot melt adhesive film. Types, corresponding chemical names are ethylene-vinyl acetate polymer, thermoplastic polyurethane, polyamide, polyester, polyolefin. These types of high molecular polymers have their own characteristics, so the performance of the hot melt adhesive film products made is also different, but as an adhesive product, the most important performance index may be the bonding strength. Which type of hot melt adhesive film product has the best adhesive strength?

In fact, there is no way to give an accurate answer to the question of which bond strength is the best. Because different types of adhesives have different bonding characteristics for different materials, the bonding strengths reflected are also different. For example, the bonding effect of PES hot melt adhesive film to metal is generally better than that of TPU hot melt adhesive film, but a certain kind of TPU hot melt adhesive film may be far better than PES hot melt adhesive film for adhesion to PVC plastics. Therefore, the question of which material has the best adhesive strength is not very specific and difficult to answer. Generally, a specific material type can be given before it can be determined based on experience.

Of course, it is usually difficult to accurately judge which type of hot melt adhesive film is the best to bond after a specific material type is actually given. We can only judge a general result based on the most common situation and experience. The final Confirmation still requires experimental tests to prove that it is the most accurate. Because even if the material is the same, the difference in surface roughness, surface tension and other factors will eventually affect the bonding of the material because of the difference in the process.