What is the working principle of self-adhesive? We often encounter various problems in the process of using self-adhesive materials. Generally, the problems encountered are related to the viscosity of self-adhesive materials. Then we know the working principle of self-adhesive material glue. If you encounter some problems, you can usually answer them very well.
What is stickiness, stickiness is the force between two surfaces, cohesion is the strength of the glue itself, and stickiness is the force between the self-adhesive material and the surface of the object to be pasted. Cohesion is the strength of the self-adhesive material glue itself.
What is the specific viscosity of the self-adhesive material related to? What does cohesion do, and what does it have to do with stickiness?
The relationship between the viscosity and cohesion of self-adhesive materials is inversely proportional. When the viscosity is stronger, the glue is softer and the cohesion is smaller; when the viscosity is smaller, the glue is harder and the cohesion is stronger. The more viscous the glue, the greater the initial tack, the greater the cohesion of the glue, and the stronger the sticking force of the self-adhesive material. Therefore, when self-adhesive manufacturers make self-adhesive materials, the glue of self-adhesive can neither be too soft nor too hard. Generally, the value of the middle part will be selected according to the different needs of customers.
So what is the working principle of the material glue of the self-adhesive manufacturer? In fact, it is related to the following.
1. The type of glue and the thickness of the glue. Different glues have different viscosity indicators. Generally, the thicker the glue thickness, the better the viscosity.
2. The surface energy, roughness and shape of the object to be attached. That is to say, what do you stick the sticker on, such as glass or plastic, the surface energy and roughness of different objects are different, and the shape of the object to be attached, such as flat or round, or bottle posted above.
3. The flow time of the pasted glue and the time it takes to place it after pasting, because glue pasting requires a process. When the self-adhesive is just pasted, the viscosity is different from that after it has been pasted for a period of time. In life, it is felt when there is some glue.
4. Pressure, when the self-adhesive material is pasted to the object, it needs a certain amount of pressure.
5. The temperature during labeling, generally room temperature is the ideal temperature for labeling. When the temperature rises, the glue will become soft and the cohesion will decrease (the hot sol is more sensitive at high temperatures). When the temperature decreases, the glue will become hard and the viscosity will decrease. Not conducive to production operations. So room temperature is best when labeling.