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Die-cut glue overflow refers to the phenomenon where glue overflows at the edges of self-adhesive labels after the die-cutting process. It is a common defect of self-adhesive labels. Glue overflow can...
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How to identify the quality of self-adhesive labels? Let me take you through the following five aspects.
1. Smell the smell. If the smell is very strong and has a sour smell, the holding power of this tape is very poor, especially in low temperature environments. It will basically crack when it sticks to the carton. The stronger the smell, the initial tackiness will still be the same. It is very sticky, but the adhesive surface will soon dry out and lose its adhesiveness. At that time, cracks will appear on the surface of the tape. Because of uneven glue application.
2. Look at the brightness of the film. Generally, low-quality tapes are dark in color. This kind of tape has a very high probability of breaking and has poor strength.
3. The thickness of the hand-feeling film. Tapes with hard films are generally slightly worse, and due to the thickness of the film, the actual number of meters will be reduced. The films used in good tapes are relatively soft and have good stretchability.
4. Look at the color. Generally, the whiter the transparent tape is, the fewer impurities in the tape will ensure normal adhesiveness. Tapes below 100 meters have a certain degree of transparency and the paper tube can be seen. For yellow tape, check whether there are irregularly distributed white spots on the surface of the tape. Those that cannot be removed by hand are impurities or marks of dried glue. This product generally has an odor.
5. Look at the paper tube: The use of thick paper tube tape is generally intended to mislead consumers. The inner diameter of the paper tubes of tapes is uniformly 7.6 cm. Many people think that the thicker the paper tube and the larger the outer ring, the more the tape will be rolled. This sounds correct, but can you calculate it carefully? Let’s just compare a 3 mm paper tube with a 7 mm paper tube. If the pure tape thickness of both rolls of tape from the outer diameter of the paper tube to the edge of the tape is 1 cm, we can use mathematical formulas to calculate the comparison of the 7 mm paper tube. How many meters of tape can be added to each 1 cm of glue thickness on a 3 mm paper tube?
