The quality difference of double-sided tape

by:CROWN     2021-10-18

How to distinguish the quality of colored tape? Colored tape is used for marking and covering purposes. Usually beige and khaki. Many people think that colored tape is the color of the film. In fact, the color is the color of the glue. Squeeze the adhesive and quickly pull it apart, you can pull the adhesive from one side, and then you can see the purity and transparency of the original film. It is important to check the thickness of the glue. If the glue is not pulled or scattered, there will be many impurities in the glue, and the glue has no cohesion.

The second reason is that too much water has evaporated. At this time, the initial adhesive force of the tape is significantly reduced, and the hand feel can be distinguished. Put yellow tape on the object. The better the shielding performance, the thicker the glue, the better the quality. Compared with the appearance of the tape, there are few tapes, the color of the entire roll of the doped tape is very dark, and the transparency of the tape after opening is high. The color of the entire roll of tape is not much different from the color after tearing, because a good tape has strong shielding properties and there is no color overlap. Inferior doped tapes require impurities to be applied to the BOPP film. Only the relatively backward direct gluing method is used. Therefore, there are often large foreign particles that are not completely dissolved and paper jams occur, so tapes are often used. Wired (no glue).

The good tape uses soft glue transfer and gluing methods, and there is no linear situation (ink leakage and less printing tape are related to the printer). Another way to distinguish is to look at the surface of the tape. When the tape is divided into finished products, bubbles will appear. After a week, the bubbles will basically disappear. The surface of the pure tin tape is smooth without any white spots.

The impurity-doped belt has many irregularly distributed white spots. These white spots are different from bubbles because they will not be dispersed by hand pressure. In short, everyone can basically judge the quality of the tape from the appearance of the tape. The important condition for distinguishing a good tape from a bad tape is not to feel the viscosity just by the feel of the hand, because the doped tape has a very high initial adhesion without volatilization, so it is necessary to use the tape and then quickly pull it apart to check the retention. After pasting it several times and then touching it with your hand, you will obviously feel the attenuation. When using doped tape to prepare the glue,

It is usually necessary to dissolve it with gasoline and acid, so the smell is very strong. Conventional large companies use toluene for dissolution, and they are volatilized during the coating process.

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