What should I do if there is glue overflow at the edge of A4 adhesive labels?

When there is glue overflow at the edge of A4 adhesive labels, the following measures can be taken to deal with it:

1、 Identify the cause of glue overflow

Firstly, it is necessary to identify the specific cause of adhesive overflow. The overflow of adhesive on the edge of self-adhesive labels may be caused by various factors, such as high temperature and high humidity environment, excessive adhesive coating, sharp die-cutting tools, improper die-cutting pressure, etc. Understanding the causes of glue overflow can help develop targeted solutions.

2、 Physical treatment methods

Using sharp knives:

During the die-cutting process, sharp cutting tools are used to reduce the squeezing and flipping of the adhesive, thereby reducing the possibility of glue overflow.

Adjust die-cutting pressure:

Strictly control the die-cutting pressure to avoid adverse effects of excessive or insufficient pressure on the adhesive. Excessive pressure may cause the adhesive to be excessively squeezed and overflow, while insufficient pressure may cause the adhesive to draw.

Freezing treatment:

For the overflow that has already occurred, freezing method can be attempted for treatment. Use ice packs or cryoprotectants to cool down the excess adhesive area and make it hard, then gently scrape it off with a scraper or nail. This method is suitable for larger areas of overflow glue, but care should be taken to avoid excessive scratching and damaging the surface.

3、 Chemical treatment methods

Using solvents:

You can choose some solvents with strong solubility, such as alcohol, acetone, or lemon oil, apply the solvent to the overflow area, and then wipe it with a cloth or cotton swab. This method can effectively remove the adhesive residue on self-adhesive labels. However, it should be noted that good ventilation should be ensured when using solvents, and solvents should be avoided from coming into contact with other material surfaces.

Use professional adhesive remover:

There are also some products on the market specifically designed for removing glue, which can be used correctly according to the product instructions. These products are usually able to quickly and thoroughly remove adhesive residue from adhesive labels.

4、 Preventive measures

Control environmental conditions:

When producing and storing adhesive labels, environmental conditions such as temperature and humidity should be controlled. Avoid storing adhesive labels in high temperature and high humidity environments for extended periods of time to reduce the fluidity of the adhesive.

Choose the appropriate adhesive:

When choosing adhesive label materials, it is necessary to consult the supplier in advance about the type of adhesive and processing performance of the material. Choose the appropriate type of adhesive based on actual needs to reduce the possibility of glue overflow.

Reasonably control the coating amount:

When applying adhesive, the coating amount should be reasonably controlled. Avoid the occurrence of overflow caused by excessive coating amount.

In summary, dealing with the problem of A4 adhesive label edge overflow requires starting from multiple aspects such as identifying the cause, adopting physical or chemical treatment methods, and taking preventive measures. By adopting reasonable handling methods and preventive measures, the probability of adhesive overflow can be effectively reduced, and the printing quality and production efficiency of self-adhesive labels can be improved.