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ANTI-MOLD MS GLUE tells the principle and precautions of glue?

Release time：

2021-01-29 11:55

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Glue is an intermediate that connects two materials. It mostly appears as a water agent. It belongs to the fine chemical industry and has a wide variety of types. It is mainly classified by adhesive, physical form, hardening method and material of the adherend. In the use of glue, if the amount of glue is too much, the polymers in the glue will crowd each other, and the polymers will not be able to generate good tension. At the same time, the moisture between the polymers is not easy to evaporate. This is why in the bonding process "the thicker the film, the worse the bonding effectiveness of the glue". The bonding of objects is achieved by the tension between the polymers in the glue. In the glue, water is the carrier of the medium polymer body, and the water carrying the polymer body slowly immerses into the tissue of the object. When the water in the glue disappears, the polymer in the glue will rely on mutual tension to bind the two objects tightly. If the amount of glue is too much, the glue plays a "filling effect" rather than a bonding effect. The adhesion between objects depends not on the adhesion of the glue, but the "cohesion" of the glue. If it is not water-soluble, the principle is actually the same, that is, other solvents are used instead of water. Then understand its principle, let's follow the editor of ANTI-MOLD MS GLUE to understand its precautions!

Glue and sealant must be used in a certain environment, and the working conditions have an important influence on the bonding performance. In the conditions of use, there are stress conditions, ambient temperature and humidity, chemical media conditions, outdoor conditions and so on.

1. Force condition. When the adherend is subjected to peeling force and uneven pull-off force, rubber with good toughness can be selected, such as rubber glue, polyurethane glue, etc.; when it is subjected to uniform pull-off force and shear force, it can be selected with higher hardness and strength. High glue, such as epoxy glue.

2. Temperature conditions. Different glues have different heat resistance. According to different temperatures, choose different glues.

3. Humidity. Moisture and moisture are detrimental to the stability of the bonding interface, and can be said to be harmful and not beneficial. Because water molecules are small in size and high in polarity, they have a hydrolysis effect through penetration and diffusion, causing the bonding surface to be damaged or detached by itself, resulting in a decrease in bonding strength and durability. The adhered parts require good water resistance, epoxy glue, polyurethane glue and so on.

4. Outdoor conditions. Adhesive joints used outdoors are under complex conditions. Temperature changes, wind, rain, and freezing in the sun will accelerate the aging of the adhesive layer and shorten the life span. Therefore, under outdoor conditions, high temperature curing and weather resistant adhesives should be used for bonding.

In summary, the editor of ANTI-MOLD MS GLUE tells: You can learn more about the principle of glue and the relevant knowledge of the precautions when using it.

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