The Reason For The Warping Of The Edge Of The Self-adhesive

Self-adhesive labels are ubiquitous in our daily life, and they are necessary consumables for many manufacturers. However, the warping edge of self-adhesive labels has been troubling many manufacturers. A small warping edge will directly affect the beauty of products, resulting in their own products being not favored from a visual point of view. So, why will the adhesive warp? How to deal with this warping problem? Find out more with Yucai Printing.

1. When sticking self-adhesive labels on automatic labeling machines, many manufacturers find that the warping edge often appears, which is the problem of initial adhesion and the instantaneous adhesion is not strong. That is to say, when the roller of the automatic labeling machine presses the label on the bottle, the time is too fast, and the pressure time between the label adhesive surface and the contact surface of the bottle is not long enough, resulting in the label not being able to adhere to the bottle well and easy to warp. This is the case that the initial adhesion of the self-adhesive label is not strong.

2. Many people find that self-adhesive labels will fall off after a short time and lose viscosity. This situation is the problem of holding stickiness, which is poor holding force. In other words, the durability of label glue is too poor. After reaching a certain period, the glue loses viscosity, has no adhesion, and falls off naturally. It's the durability of the glue.

The Following is the Specific Treatment of the Warping Edge of the Adhesive:

1. The pressure of the press wheel of the labeling machine is not enough: adjust the pressure wheel of the labeling machine and check the machine fault.

2. Glue viscosity is too weak: appropriate glue materials should be selected;

3. Improper selection of adhesives: When choosing self-adhesive, first of all, it is necessary to determine whether the adhesive required by the self-adhesive label is permanent or detachable, whether it can be pasted once or re-pasted, and whether the product has special requirements for the chemical characteristics of the adhesive used by the self-adhesive label. For example, in the large surface (diameter of less than 2 cm circular substrate) on the label, should not use thick or hard paper materials (such as mirror coated paper) as the surface material, but should use thin or soft paper materials and adhesives with high initial viscosity; For containers requiring hot filling, film materials and adhesives with good initial viscosity should be selected as the surface materials of self-adhesive materials.

4. coated tension control is not good: the correct label covered by the film is removed from the base paper after leveling, no curling. After labeling, the label can maintain good follow-up; When a label with over-tight film tension is removed from the base paper, the label will flip up. As a result, the edge of the label is prone to unglue, and the label is prone to warp.

5. the bottle shape design is not reasonable: the reasonable design should be the surface of the bottle body is flat in the labeling range (mainly the design of the flat bottle body), but if the surface of the labeling range is partially spherical, the labeling area is large when the branch label is used, and the lower end of the labeling is easy to wrinkled on both sides.

At the end of the day, is the non-drying glue out of the question, the manufacturer at the time of purchasing the non-drying label, whether it is important to note that the label with the appropriate glue, Shanghai Yucai printing is a very good self-adhesive label manufacturer, many customers are here custom self-adhesive label, and according to the customer's quality is guarantee of manufacturer, The initial adhesion and durability of self-adhesive are relatively stable, and there is no warping edge.

If you have any further questions, please feel free to contact our sticker experts.