The eight technical properties of the adhesive, these are the basic conditions to ensure the degree of adhesion!

When choosing an adhesive, you should first understand its basic technical properties, which are the basic conditions to ensure the degree of adhesion.

Technical performance of the adhesive

1.
Craftsmanship

It refers to the performance of the adhesive related to the bonding operation, including the preparation of the adhesive, gluing, drying, curing conditions, etc.
, and it is also an evaluation of the difficulty of the bonding operation.
As mentioned earlier, multi-component adhesives must be prepared on site.

Chemically reactive adhesives require temperature conditions for the curing reaction.
Solvent adhesives need to be left in the air for a period of time after the glue is applied until the solvent evaporates before bonding.

2.
Bonding strength

Bonding strength is a performance index to ensure the firmness of the bond.
Insufficient bonding strength will cause the adherend to fall off.

If it is wall decoration, the adherend will fall off, which will not only affect the decoration quality, but sometimes cause injury accidents.

3.
Stability

Stability refers to the degree of change in the strength of the bonded specimen after being immersed in a specified medium at a certain temperature for a period of time.
Such as water resistance, oil resistance and so on.

It is usually expressed by measured strength or by strength retention rate.

4.
Durability (or aging resistance)

As the time of use increases, the performance of the adhesive layer will gradually age until it loses its bonding strength.
This performance is called durability.

Because the most used adhesives are organic polymer materials based on synthetic resins or synthetic rubbers, which are prone to aging and deterioration during use, causing the bonding layer to lose its effectiveness and fall off.

5.
Temperature resistance

Temperature resistance refers to the change in the performance of the adhesive within a specified temperature range.
Including heat resistance (under high temperature environmental conditions), cold resistance (under low temperature environmental conditions) and resistance to high and low temperature changes.

These temperature changes will also change the composition of the adhesive, thereby reducing the bonding strength until the adhesive layer falls off.

6.
Weather resistance

For the bonding parts exposed to the outdoors, their ability to withstand weather, such as rain, sunlight, wind and snow, and moisture, is called weather resistance.
The weather resistance also reflects the long-term effect of natural conditions, the adhesive layer's performance resistance to aging.

It is also because of these natural factors that the properties of the bonding layer will deteriorate and the bonding strength will be affected.

7.
Chemical resistance

Most synthetic resin adhesives and some natural resin adhesives will undergo different changes such as dissolution, swelling, aging or corrosion under the action of chemical media, resulting in a decrease in bonding strength.

8.
Other properties

In addition to the several properties described above (that is, the influence of various environmental conditions such as temperature, humidity, sunlight, chemical media, etc.
on the bonding strength of the adhesive layer of the adhesive, which comprehensively reflects the use effect of the adhesive layer) in the selection In addition to the adhesives, other properties of the adhesive should be considered, such as: whether there is a pungent odor, whether it is toxic, what is the color of the adhesive, what is the storage stability, how long the storage period is, and the price.

The adhesive used indoors should have no pungent odor and no toxicity.
If an odorous adhesive must be used, it should be used after the adhesive layer is completely dry.
Choose a similar color or white adhesive according to the color of the object to be adhered, so as to prevent the color of the adhesive from contaminating the surface and affecting the decorative effect of the surface.

In addition, attention should be paid to the storage period of the adhesive, because the actual bonding performance (especially the bonding strength of the adhesive) of the adhesive after the storage period will be greatly reduced, thereby affecting the bonding effect.