Edge Glue Seepage In Self-adhesive Label: What You Need to Know

When using self-adhesive label for labeling, end-users often encounter problems such as glue seepage from the edge of the label self adhesive or the self-adhesive label directly sticking to the bottom paper, which not only affects production efficiency, but may also lead to a large amount of waste of labels or goods. Such problems usually increase costs and affect customer experience, and even cause loss of brand reputation. According to years of actual case analysis, there are many reasons for this situation, including the quality of raw materials, the processing technology of printing companies, packaging methods, and the operation methods of end-users during use. The following are some possible reasons for the glue seepage problem of labels self adhesive, and corresponding solutions are proposed.

1. Changes in the amount of glue applied

Changes in temperature and humidity in different seasons and regions will cause changes in the amount of adhesive applied in the self-adhesive material. Especially in high temperature environments, the fluidity of the adhesive increases, which may cause glue to seep out of the edge of the label. In order to ensure the stability of material quality, label manufacturers must maintain close communication with suppliers to ensure that the adhesive materials provided by suppliers remain consistent during the coating process. If it is a self-coating self-adhesive material, the manufacturer should make adjustments in different seasons and perform quality control based on factors such as coating amount, temperature, and humidity. Especially in a high humidity environment, the applied adhesive may be affected, causing fluctuations in label quality, so it is necessary to strengthen the precise control of the amount of glue applied.

2. Quality control of adhesives

The quality of adhesives directly affects the use effect of self-adhesive labels, especially in the problem of glue seepage at the edge of the label. The fluidity of the adhesive is closely related to its water content and solvent content. Excessive solvent content or moisture will make the adhesive too fluid and then penetrate to the edge of the label. To avoid this problem, manufacturer label need to strictly control the quality of the adhesive formula to ensure that the moisture content and solvent content of the finished self-adhesive material are within a reasonable range. At the same time, through laboratory testing, the relationship between coating amount, drying temperature and coating speed can be optimized to obtain the best adhesive performance.

3. Storage or storage of materials

The materials of blank self adhesive labels must be stored in a suitable environment, especially the control of temperature and humidity is crucial. Excessive temperature or humidity may cause the adhesive to soften or increase fluidity, which in turn causes the label to seep. Therefore, after receiving the self-adhesive materials, label manufacturers and end users should store them in an environment with suitable temperature and humidity, avoid storage under extreme conditions, and ensure that the performance of the adhesive is not affected.

Die-cutting process Die-cutting is a key step in self adhesive label roll production. The sharpness of the die-cutting knife and the adjustment of the pressure directly affect the cutting quality of the label. If the die-cutting knife is not sharp enough, it may not be able to completely cut off the adhesive layer of the label, resulting in glue seepage on the edge of the label. In order to ensure the die-cutting effect, regular maintenance and cleaning of the die-cutting knife is very important. During the die-cutting process, if flat die-cutting is used, special attention should be paid to regular cleaning or replacement of the sponge on the die-cutting plate. In addition, the winding tension after die-cutting should be kept appropriate to avoid excessive tension causing glue seepage on the edge of the label. For label jumbo roll, it is best to perform striping as soon as possible after die-cutting to reduce the effect of tension in the label roll on glue penetration.

1. Striping process

The striping process requires special attention to the cleaning and regular maintenance of the blade to prevent the glue attached to the surface of the blade from transferring to the base paper, causing the self-adhesive label to stick during the packaging process. The striped label should be properly tensioned to avoid glue seepage on the edge of the label due to excessive winding tension. After the label is slit, check it on the rewinder and readjust the tension in the roll, which can effectively reduce the risk of label glue seepage. If necessary, the self adhesive label sticker can be placed on a paper pallet to further reduce the impact of looseness and tension on the quality of the label.

2. Packaging and storage

During the packaging of the label, the label should be fixed and placed in a standard manner. When the stripped labels or the single labels after die-cutting are placed in the packaging box, it should be ensured that the labels will not squeeze each other. Excessive squeezing will cause the label glue to be compressed and cause glue seepage. Appropriate space should be left in the label packaging box, and do not place too many labels to avoid the self adhesive labels roll being affected by external forces during transportation, causing glue seepage. In addition, the storage environment of the finished sticky self adhesive labels should also be strictly controlled to avoid extreme temperature and humidity conditions that have an adverse effect on the quality of the label.

3. Environmental factors

The temperature and humidity control of the label production workshop or warehouse is particularly important. The finished self adhesive label should be placed on the shelf to avoid being squeezed or in a high humidity and high temperature environment for a long time. Fluctuations in temperature and humidity will affect the adhesion and fluidity of the glue, resulting in glue seepage at the edge of the label. Therefore, the production environment should maintain stable temperature and humidity to prevent the rolls self adhesive labels from being affected by the external environment during storage and transportation.

1. Storage environment

For terminal brand users, it is crucial to ensure that the storage environment of the self adhesive label is appropriate. Self adhesive blank labels should be stored in a suitable temperature and humidity environment, especially in the hot and humid summer. The high temperature of the warehouse may increase the fluidity of the label glue, thereby causing glue seepage problems. Therefore, the warehouse should be kept within a reasonable temperature and humidity range to avoid quality problems of the label due to improper storage environment.

2. Labeling environment

The use environment of the self adhesive printed labels also needs to be properly controlled. Especially during the production and labeling process, the temperature and humidity should be kept in an ideal state to avoid glue penetration problems caused by environmental factors. An ideal labeling environment can ensure the smooth application of self-adhesive labels, improve labeling efficiency, and reduce losses caused by glue seepage.

Although the problem of glue seepage on the edge of self adhesive label may seem minor, once it occurs, it may have a serious impact on production efficiency and product quality. To solve this problem, it is necessary not only to start with the selection and quality control of raw materials, but also to pay attention to every detail in the production process, including die-cutting, striping, packaging and other links. At the same time, terminal brand users also need to pay attention to environmental control during warehousing and labeling to ensure that the self adhesive sticker labels are in the best condition before and during use. Through comprehensive management and meticulous process control, the occurrence of glue seepage problems of self-adhesive labels can be effectively avoided to ensure the smooth progress of production.

From the above understanding, we can see that the glue seepage problem of self-adhesive labels is often not caused by a single factor, but the result of multiple factors such as raw materials, process control and use environment. Therefore, it is particularly important to choose a label production company with a high-quality material supply chain, strict process management and rich industry experience.

As a professional factory with 20 years of experience in label manufacturing, Sailingpaper strictly adheres to quality standards in every link from source material control to production and processing to delivery quality inspection. We use highly stable self adhesive label material, advanced die-cutting and striping equipment, and standardized packaging processes to avoid common problems such as glue seepage and reverse sticking to the greatest extent. At the same time, Sailingpaper also supports a variety of label sizes and material customization, fast delivery, serving global customers, and providing you with more professional and efficient label solutions.

Choose Sailingpaper to make labels more intimate and brands more secure!