1. Familiar with the properties of adhesives

For bonding, adhesive is the basis, the selection of adhesive, its performance is an important basis. Different types of adhesives, with different properties, determine their various uses, only familiar with the performance of adhesives, in order to handy selection.

2.Identify the nature of the adhesive

There are many types of adhesive species with different properties, and the properties of each type of material are also different, and the appropriate adhesive must be selected according to the different characteristics of the material. Materials are divided into metal materials, non-metal materials and composite materials.

3.The conditions of use should not be ignored

The adhesive parts should be used under certain conditions, and the condition factors have an important impact on the bonding performance, so the condition factors can not be ignored when selecting the adhesive.

1)Temperature

Different adhesives have different heat resistance. Some have good heat resistance and can be used at higher temperatures; Some have poor heat resistance and can only be used at lower temperatures, most adhesives have better low temperature resistance, and some can also be used in ultra-low temperature environments. The general adhesive use temperature is -40 ~ 150℃.

2)Humidity

Moisture and moisture are very unfavorable to the stability of the adhesive interface and can be said to be harmful. In the environment with high humidity, 502 rubber, unsaturated polyester resin rubber, epoxy-polyamide rubber can not be used, but phenolic butyrilene rubber, epoxy-nitrile rubber, epoxy polysulfide rubber and so on should be used. It is best to get warm curing.

3)Chemical media

The chemical medium is mainly acid, alkali, salt, solvent, etc., different types of adhesives, different curing conditions, with different ability to withstand the medium, should be selected according to the adhesive contact medium.

4)Consider the possibility of process implementation

All kinds of different adhesives need different process conditions, some can be completely cured at room temperature, and some can be cured by heating; Some cure quickly, some cure slowly. On the continuous production line, if a long curing time is not allowed, a fast curing adhesive should be selected.