In order to obtain a high-quality self-adhesive labels, in addition to the configuration of high-quality label printing equipment, the reasonable choice of self-adhesive label materials is also a very important link. Why do some labels warp? Today, let's introduce several other reasons.
1. The viscosity of self-adhesive labels and product matching the impact of label warping
If the viscosity of self-adhesive label material is not enough, it will surely lead to the problem of label warping. In addition, due to the wide variety of self-adhesive labeling materials, different labeling materials and self-adhesive labeling materials to match the problem.
The above considerations have been clearly written on the technical parameters of self-adhesive label materials. Therefore, it is recommended that label printing companies in the selection of self-adhesive labeling materials, you must carefully read the technical parameters of the product, and it is recommended to send samples to the end user to confirm, should also be attached to the self-adhesive labeling materials of the product's technical parameters, to avoid end-users to avoid the misuse of unnecessary risks.
2. Self-adhesive labels on the surface of the flatness of the material on the impact of label warping
For self-adhesive labeling materials, self-adhesive labeling surface material smoothness is the key factor affecting the overall material smoothness, the overall material smoothness is to ensure that the printing quality of the important indicators. Therefore, in the labeling process, attention must be paid to check whether the self-adhesive label surface material is smooth, especially when the label has a film, it must be noted that the film tension can not be too large, otherwise the tension will be too large to lead to the label upward curling, resulting in label warping.
3. Label design on the impact of label warping
In the design, the label should try to avoid lapping from end to end. If it can not be avoided, the use of cold lamination should be avoided, and lap parts shall not be printed or varnish.
At the beginning and end of the label, the following points should be noted:
(1) If the label must be covered with film, the film must be corona-treated after the film is covered so that the film surface is greater than 38 for normal labeling.
(2) When printing, the lap should be left white, the printing surface can be larger than the lap position 1~2 lines, which can ensure that the labeling will not appear white;
(3) For the need to varnish the label, you can change the original full-page varnish to local varnish, lap labeling is not varnish;
(4) Note that UV due to the curing transition of the ink layer surface will reduce the degree of ink curing, will affect the next layer of ink bonding and adhesion of glue.
4. The material being labeled on the impact of label warping
As the material of the affixed object is different, its surface may be different, so the effect of the same adhesive label will be different. Usually, the surface of different materials can be compared as follows: stainless steel > glass > PET > PP > PE.
In addition, due to different processing technology, the same material of the adhesive material will also make its surface different, such as siliconized glass bottles, plastic bottles with different surface roughness. Therefore, for different surfaces of the paste materials or bottles, you need to choose different adhesive labels to match.
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