What kind of material is the hot melt adhesive film?

What kind of material is the hot melt adhesive film?
Hot-melt adhesive film is a form of hot-melt adhesive, so it is an adhesive, which means that it is a material for bonding or compounding. In terms of material classification, it is an organic synthetic adhesive, and its main component is a polymer compound, such as polyurethane, polyamide, and so on. In essence, these substances are all petrochemical products, just like the fabrics of the clothes we wear now, the plastic products we use daily, etc., they are all petrochemical products.
From the material point of view, the hot melt adhesive film is a solvent-free, moisture-free, and 100% solid content adhesive. It is a solid at room temperature and melts into a liquid after heating, which can form between materials Gluing. Since it is solid at room temperature, hot melt adhesive films are generally made into rolls, which are very easy to package, transport and store.
In terms of use method, since the hot melt adhesive film adopts the sizing method of heating to melt and cooling to harden, its bonding speed is very fast. Generally, large roller laminating machines, pressing machines and other professional equipment are used for operation. There is a relatively large laminating area, and the width can reach more than 1 meter, and some can even reach more than 2 meters, and the production efficiency is extremely high.
To talk about the difference between hot melt adhesive film and ordinary plastic film, in fact, they may not be different in essence, and sometimes they are actually the same material. However, due to the differences in the molecular weight of the raw materials used in their production, the chain structure or the added auxiliary materials, the hot melt adhesive film will eventually become sticky after melting, while the plastic film will not have good stickiness and shrink after melting. It is very strong, so it is not suitable for bonding or composite materials.
Finally, to summarize in one sentence, hot melt adhesive film is a kind of adhesive prod