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The advantages of hot melt adhesives are primarily manifested in the following facets:

1 Quick curing speed, good bonding strength and flexibility.

Hot melt adhesives can cure and bond within a few tenths of a second to some seconds, and have the traits of melting when heated, and bonding when cold. This enables packers to use hot melt adhesives to make use of higher-speed production lines, and improve production while reducing defective products, which is convenient for steady and automated high-speed operations, and has a lower cost.

2 The ability of hot melt adhesive is stable

It isn't affected by modifications in temperature and humidity from morning to night in the working environment, which ensures the bonding fastness and eliminates the inherent adhesive peeling problem of packaging machinery.

3 Hot melt glue doesn't comprise water and another fluxes

Its solids will be made into blocks, films, strips or pellets, which are simple to transport and store. It has a protracted service life, eliminates damage and waste, and is simple to use.

4 The hot melt adhesive doesn't comprise solvents and does not emit dangerous and toxic fumes, is not easy to burn or explode, is safe, and will not cause secondary pollution to the environment and endanger human health.

5 The hot melt adhesive forms a glue layer that's immune to water and moisture, and may form a reliable glue even in a humid environment.

6 Hot melt adhesive can be repeatedly melted and bonded

If the hot melt adhesive coated on the adherend cannot be bonded as a result of cooling and solidification, it could be reheated for bonding operation, so it is particularly suitable for bonding with some particular process requirements parts, 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, excellent shielding.

In fact, hot melt adhesives also have some disadvantages, as described below:

1 There are limitations in performance, inadequate heat resistance, limited bonding power, 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 Coating by hand, the impact shouldn't be good, and the waste of rubber is tough to control. Subsequently, it is necessary to be equipped with special equipment to melt and apply glue, resembling a hot melt gun, which is inconvenient to use and restricts its use and promotion.

three Bonding is usually affected by climate and seasons. Usually, the wettability is poor in winter, the curing becomes slower in summer, and the melting time is shortened when the wind is strong.

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