How much do you know about the combination of self-adhesive labels and label glue?

How much do you know about the combination of self-adhesive labels and label glue?

Although many printing companies know what kind of self-adhesive labels they need, they do not understand the glue that is important for the stickiness of the self-adhesive labels. The following will introduce some related content of label glue to you, and provide the direction of choice of label glue.

　　1, the choice of permanent and removable

　　From the perspective of adhesive performance, it can be divided into two categories: permanent adhesives and removable adhesives.

　　●Permanent generally used in electronic machinery, such as electronic labels, typical: mobile phone battery labels

　　●Removability is generally used in food, personal care, etc., such as: wet tissue labels, fruit labels, labels on clothes, etc.

　　2, the surface of the affixed object

　　 Labels processed with self-adhesive materials may be labeled on the surface of various materials, such as glass, metal, cardboard, and plastic, and plastics can be further divided into: polyvinyl chloride, high-density polyethylene. Tests have shown that different label surfaces have the greatest impact on performance. It is best to use glue and materials with the same or similar chemical composition to stick to the object.

　　3, the surface structure of the label substrate

　　Intuitively, the rough surface of the label requires strong glue.

　　4, the surface shape of the label substrate

The surface of the label substrate can be divided into flat and curved surfaces. If the label surface has a certain curvature (for example, the surface of a medicine bottle with a diameter of less than three centimeters), it may require a good adhesiveness or a strong glue for the tissue. It is also necessary to choose materials with better flexibility and stretch resistance, such as PVC. The flat surface of the object is suitable for a wider range of label materials.

　　5. The cleanliness of the label surface

　　 Self-adhesive materials are most suitable for label substrates with clean, dry, oil-free and dust-free surfaces. During any labeling, the surface of the object to be labeled must be kept dry, oil-free and dust-free, so that the best labeling effect can be achieved.

　　 6, the adverse effect of plasticization on glue

　　 Labeling conditions-the adhesive viscosity needs to be pasted under cold, hot, humid or room temperature conditions.

　　Using environment-whether the sticker is exposed to an environment below freezing point, whether it is used outdoors, under high temperature, humidity or under ultraviolet light, and whether it is close to a higher temperature car engine.

　　 Let me introduce the common self-adhesive glues, which are divided into three types: hot melt glue, hydrosol (usually called water glue) and solvent glue.

In addition to the characteristics listed in the table, we must also pay attention: the first time the adhesive is pasted, the viscosity of the hot melt adhesive is much stronger than that of the water adhesive. However, if you try again after 24 hours, you will find , The label using water glue is far more difficult to uncover than hot melt adhesive. This is because the fluidity of water glue is slow. In more than 20 hours after labeling, the glue under the label finally completely matches the adherend. Causes of surface adhesion. However, solvent glue is not used too much in the general field due to its high price.

China Customized Kraft Paper Sticker Manufacturers, Suppliers - Factory Direct Wholesale - MINONG