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Seven factors affecting the transfer rate of adhesive

1, seven factors affecting the transfer rate of adhesive

There are many factors that affect the transfer rate of adhesives. Generally speaking, the transfer rate of adhesives depends mainly on the following factors:

1) the properties of adhesives are mainly adhesives' adhesion to specific substrates and the viscosity of adhesives. The better adhesive force is, the higher the transfer rate of adhesive. When the viscosity of adhesive is within a certain range, the transfer rate will tend to be relatively stable. However, when the working viscosity is too high or too low, normal transfer can not be performed, and the metastasis rate will decrease.

2) the properties of the base material, including the material, thickness, rigidity and surface condition of the base, the most important factors are the material, the surface tension and the absorbability to the adhesive.

3) the characteristics of the coating roller include the rigidity and surface characteristics of the coating roller, especially the adhesion of the surface to the adhesive.

4) the characteristics of coated cots, which mainly relate to the hardness and diameter of coated cots and their resilience. Different hardness, diameter and resilience have direct effects on the transfer rate.

5) the pressure of coating pressure or working pressure is the pressure between the coating roller and the coated steel roll, in fact it is the pressure of the coating roller to the base material, the film and the coated steel roll. It directly affects the combination of base and adhesive and the transfer of adhesive to substrate. In general, the greater the pressure, the higher the transfer rate of adhesive. However, when the coating pressure is too high, the abnormity between the cots, the base material, the glue layer and the steel roller can not be transferred normally.

6) working speed and its acceleration. Within a certain speed range, the bonding status of substrate and rubber roller and adhesive is not obviously related to speed. However, when the speed is changed within a certain range, or the acceleration is in a certain range, the status of the base material, the rubber roll and the adhesive will be obviously perceptible, and the transfer rate of the adhesive will change. Generally speaking, when the speed is not more than a certain value, or the rate of slow down is slow, the transfer of adhesives is relatively stable. If the speed is too high or the acceleration is too high, it may appear that the transfer of adhesives is obviously changed, and the metastasis rate is obviously reduced.

7) from a long time operation, the environment will also have a certain effect on the adhesive transfer rate. This effect is achieved through the influence of substrates, adhesives, and rollers.


2. The logical relationship between these factors

It is not difficult to see that the main factors affecting the transfer rate of adhesives can be attributed to four in one, seven factors and three forces.

The so-called "four in one" is directly related to the four basic components of the coating mechanism, that is, substrates, adhesives, coating rollers and cots.

The so-called "seven factors" are four basic components (adhesive, substrate, coating roll, coating roller) and three interrelated factors, such as coating pressure, working speed and acceleration, environmental conditions, etc.

The so-called "three forces" are the cohesiveness of the adhesive (the viscosity on the macro), the adhesion of the adhesive to the substrate or the roll surface of the coating roll, the base material or the adhesion of the coating roll to the adhesive.

The actual adhesive transfer rate is the result of the above factors.

It should be specially pointed out that the transfer rate of adhesive is related to the surface characteristics of the substrate, and is also related to the printing and printing process of the substrate. Therefore, for printed substrates, both the substrate and the layout should be considered.

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