Minli Hot Melt Adhesive丨What are the main advantages of hot melt adhesives?

发布时间：2021-04-15 0

The advantages of hot melt adhesives are mainly manifested in the following aspects:

1. Fast curing speed, good bonding strength and flexibility. Hot melt adhesives can be cured and bonded within a few tenths of a second to a few seconds, and have the characteristics of melting when heated, and bonding when cold. This allows packers to use hot melt adhesives to use higher-speed production lines, and increase output while reducing defective products, which is convenient for continuous and automated high-speed operations, and has a lower cost.



2. The ability of hot melt adhesive is very stable, and is not affected by changes in temperature and humidity from morning to night in the working environment. This ensures the bonding fastness and eliminates the inherent bonding and peeling problems of packaging machinery.



3. The hot melt adhesive does not contain water or any other fluxes. Its solids can be made into blocks, films, strips or pellets, which are easy to transport and store. It has a long service life, eliminates damage and waste, and is easy to use.

4. The hot melt adhesive does not contain solvents, does not emit harmful and toxic fumes, is not easy to burn or explode, is safe, and does not cause secondary pollution to the environment and endanger human health.



5. The hot melt adhesive forms a glue layer that is resistant to water and moisture, and can form a reliable glue even in a humid environment.



6. The hot melt adhesive can be repeatedly melted and bonded. If the hot melt adhesive coated on the adherend cannot be bonded due to cooling and solidification, it can be reheated for bonding operation, so it is especially suitable for bonding with some special process requirements. Connection, such as the restoration of some cultural relics.



7. A wide range of bonding objects, both bonding and sealing, no drying process, simple bonding process, and good economic benefits.



8. Good gloss and gloss retention and excellent shielding performance.

Of course, hot melt adhesives also have some disadvantages, as described below:

1. There are limitations in performance, insufficient heat resistance, limited bonding strength, and poor chemical resistance. Modification of the hot-melt adhesive base polymer can improve the heat resistance and strength of the hot-melt adhesive.

2. Manual coating is not effective, and waste of rubber is difficult to control. Therefore, it is necessary to be equipped with special equipment to melt and apply glue, such as a hot melt gun, which is inconvenient to use and restricts its use and promotion.

3. Bonding is sometimes affected by climate and seasons. Generally, the wettability in winter is poor, the curing slows down in summer, and the melting time is shortened when the wind is strong.