Everyone knows that the self-adhesive material consists of three parts: facial tissue, adhesive and base paper. Before purchasing self-adhesive materials, in addition to considering these aspects, we also need to pay attention to many factors. We must make comprehensive choices based on equipment, process, environment and labeling conditions. Otherwise, we will be careless. The decision is likely to lead to material application failure. Below I briefly summarize a few points of attention, I hope to be able to help us choose the right self-adhesive materials.
Labeling surface
Labels processed with self-adhesive materials may be applied to surfaces such as glass, metal, cardboard, and plastic. So this is one of the factors we need to consider, and tests have shown that the labeling surface of different materials has different effects on the adhesive.
2. Cleaning of the label surface
The cleaning of the label surface is also our first consideration. The self-adhesive material is most suitable for the surface cleaning, drying, oil-free and dust-free labeling substrate.
3. Surface structure of the labeling substrate
The surface structure of the labelled substrate should also be taken into account. Intuitively, a rough label surface requires a relatively strong adhesive.
4. Label the shape of the surface of the substrate
The surface of the labeling substrate has a surface and a curved surface. If the labeling surface has a certain curvature (for example, a surface of a vial having a diameter of less than three centimeters), the paper may have good flexibility and strong adhesive viscosity. .
5. Adhesive
From the properties of the adhesive, the overall can be divided into two categories: permanent adhesives and removable adhesives. We must carefully choose according to the needs of the product.
6. Adverse effects of plasticizers on adhesives
When the labeling material is polyvinyl chloride, high-density polyethylene, low-density polyethylene, polypropylene, etc., the adverse effect of plasticizer on the adhesive is absolutely not negligible, and plastic molding is often seen in polyvinyl chloride plastics. The agent will reduce the viscosity of the adhesive after being pasted for a certain period of time.
7. Labeling conditions and use environment
Labeling conditions refer to whether the sticker needs to be applied in cold, hot or humid conditions. The use environment refers to whether the self-adhesive label is exposed to the environment below freezing point, whether it is used in outdoor, high temperature, humid environment or ultraviolet light, and whether it is exposed to chemical solvents.
8. Printing methods and processing methods
After determining the printing method (such as flexo, embossing, offset printing , digital printing, etc.) and the processing method (roll to roll, roll to sheet, fold feed mode, sheet to sheet), you can decide which to use. Kind of printed material. It is worth noting that before determining the self-adhesive material, the material should be tested under the same printing and processing conditions.
9. Pay attention to problem transfer
When label printing companies first purchase self-adhesive materials, if they encounter problems that cannot be solved, they should seek help in time and do not drag. You can ask the material suppliers and professionals for help, but pay attention to the accuracy of the expression, make your own needs clear, and avoid unnecessary troubles.
The above content is selected from the 6th volume of the Label Technology of the Printing and Printing Media in 2013. For more journal content, please pay attention to the journal channel. The latest journal content is clicked to enter the electronic journal channel of Keyin.com.
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