EVA hot melt adhesives are very common in modern life. It can be used in industries such as industry and decoration, packaging, and bookbinding. When using hot melt adhesives, the usual concern is whether the hot melt adhesive can be bonded firmly, and how to bond firmly?

1. In order to bond firmly, the first problem to be solved is to ensure the correctness of EVA hot melt adhesive selection. There are many types of EVA hot melt adhesives, including rubber particles, rubber blocks, rubber powder, plastic film, omentum film, etc., and there are also film types with or without substrates. According to the composite process requirements of the product, a more suitable EVA hot melt adhesive type can be selected.

2. Stickiness. The viscosity of eva adhesive film is divided into early viscosity and late viscosity. Only when the early viscosity is consistent with the late viscosity can the hot melt adhesive and the adherend remain stable. In the production process, it should be guaranteed that it has oxidation resistance, halogen resistance, acid and alkali resistance and plasticity. The viscosity of EVA hot melt adhesive varies with the material of the adherend. Therefore, different EVA hot melt adhesives should be selected according to different materials, and the selected materials should be compatible with composite materials.

3. The color requirements of the glue should be different. If the object itself has no special requirements for color, it is recommended to use yellow hot melt adhesive. In general, yellow hot melt adhesive is stickier than white.

4. Surface treatment of the adherend. The surface treatment of hot-melt adhesives is not as strict as other adhesives, but the dust and oil on the surface of the adherend should also be properly treated, so that the hot-melt adhesive can play a better role in bonding.

5. Working hours. Fast operation is a major feature of hot melt adhesives. The working time of hot melt glue is generally about 15 seconds. With the wide application of modern production methods - assembly lines, the working time of hot melt adhesives is getting shorter and shorter, such as book binding, speaker manufacturing, etc. It takes about 5 seconds.

6. Temperature resistance. Hot melt adhesives are more sensitive to temperature. When the temperature reaches a certain level, the hot melt adhesive begins to soften. Below a certain temperature, hot melt adhesives become brittle. Therefore, the choice of hot melt adhesive must fully consider the temperature change of the environment where the product is located.

Can eva hot melt adhesive stick metal plate

As one of the five conventional hot-melt adhesive films, Eva hot-melt adhesive film has a very low melting point and is relatively strong in adapting to harsh environments. At the same time, eva hot melt adhesive film also has good adhesion, durability and optical properties, so it has very good applications in current components and some optical and photovoltaic products.

Eva hot melt adhesive film is a common type of hot melt adhesive. Many people are more curious about whether it can be used to stick metal materials. In fact, we have introduced hot melt adhesives for bonding metals in many previous articles, and you may not have seen them, so we will discuss this issue again in this article.

Can eva hot melt glue stick to metal plates? From the actual application effect, it is not recommended to use eva hot melt adhesive as the adhesive for bonding metal materials. This is because the compatibility of eva type hot melt adhesives from KETAEBO to metal materials is actually not very good, and the adhesion is not enough, which can easily lead to weak bonding.

So does it mean that hot melt adhesive can't stick to metal? no. Hot-melt adhesives can actually be used for bonding metal materials. There are many types of hot-melt adhesive materials. The types of hot-melt adhesive films include EVA film, PA film, PES film, PO film, tpu hot melt adhesive film, etc. . But not every hot melt adhesive can be used for bonding metal materials. When choosing hot melt adhesives as composite adhesives for metal materials, be sure to consider material compatibility issues.

Among the many hot melt adhesives, the best adhesion to metal materials is the hot melt adhesive made of pes material. Therefore, when you choose to use hot melt adhesive to bond metal, you should use pes hot melt adhesive, so that there will be no weak bond caused by material incompatibility.

Let's go back to the question at the beginning. It is not recommended to stick eva hot melt adhesive to the metal plate, but it does not mean that all hot melt adhesives cannot be glued, as long as the correct type of hot melt adhesive is selected.