Why can self-adhesive label warped?
Self-adhesive labels are ubiquitous in our daily life, and are necessary consumables for many manufacturers. However, the warping Angle of self-adhesive labels has been troubling many manufacturers. A small warping Angle will directly affect the beauty of the products, leading to their own products are not favored from the visual point of view. So, why will self-adhesive warping Angle? How to deal with this kind of Angle problem, here involves a lot of professional problems. The following Xiaobian to explain to you one by one.
1.When sticking self-adhesive labels on the automatic labeling machine, many manufacturers find that the warping Angle often appears, which is the initial viscosity problem, 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, the pressure time between the label rubber surface and the bottle contact surface is not long enough, resulting in the label cannot be well adhered to the bottle, and it is easy to warpage. 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 and lose viscosity after a short time. This situation is the problem of holding viscosity, is the retention of the poor. 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 method of self-adhesive warping Angle:
1.The pressure of the press wheel of the labeling machine is not enough: adjust the press wheel of the labeling machine and check the machine failure.
2.glue viscosity is too weak: should choose the appropriate glue material;
3.Improper selection of adhesive: When selecting self-adhesive, first of all, we should 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 there are special requirements for the chemical characteristics of the adhesive for the self-adhesive label. For example, when labeling large curved surfaces (circular substrates less than 2 cm in diameter), instead of using thick or hard paper materials (such as mirror coated paper) as surface materials, thin or soft paper materials and adhesives with high initial viscosity should be used; For containers requiring hot filling, film materials and adhesives with good initial viscosity should be selected as the surface material of self-adhesive materials.
4, the coating tension control is not good: the correct label of the coating is smooth after being removed from the base paper, without curling. After labeling, the label can keep good follow-up; When the label with too tight film tension is removed from the base paper, the label will turn up, leading to the phenomenon that the edge of the label is easy to degummed, and the Angle is easy to be warped after labeling.
5, the bottle shape design is not reasonable: reasonable design should be the bottle surface in the labeling range is flat (mainly flat bottle design), but if the surface within the labeling range is partially spherical, the use of branch label labeling area is large, after labeling the lower end is easy to wrinkles on both sides.
In the final analysis, there is a problem with the glue used in the self-adhesive label. When the manufacturer purchases the self-adhesive label, it is necessary to pay attention to whether the label is equipped with the right glue.
At present, our company's waterborne adhesive and and waterborne Label adhesive, has been put on the market, the market feedback is good, the performance is excellent, fully able to meet the complex needs of customers of various packaging structures.
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