I. The Impact of Adhesive Overflow

During the die-cutting process of adhesive materials, glue may overflow from the edges of the labels, resulting in an adhesive overflow. This phenomenon negatively affects the quality and appearance of adhesive products, specifically in the following ways:

• Appearance Defects: Adhesive overflow can cause uneven label edges, affecting the overall aesthetics of the product.
• Printing Contamination: The excess glue may contaminate printing equipment or printing materials, leading to a decline in print quality.
• Peeling Issues: Adhesive overflow can result in uneven peel strength between the label and release liner, affecting the adhesion and peeling performance of the label.
• User Damage: Severe adhesive overflow may damage printing equipment, causing losses to the user. Additionally, low-quality liners or poor silicone coating may lead to issues such as cutting through, label misalignment, failure to release labels, or paper jams during die-cutting, labeling, or printing.

II. Summer Adhesive Overflow Prevention Guide

During the summer, high temperatures and humidity increase the fluidity of the adhesive, making adhesive overflow more likely. Here are some recommendations to prevent adhesive overflow during the summer:

1. Control Temperature and Humidity

• The processing and storage environment for labels should maintain a temperature of 23±3℃ and a relative humidity of 55±5%.
• Avoid storing adhesive materials in high-temperature and high-humidity environments for extended periods.

2. Choose the Right Adhesive

• Select an adhesive with moderate fluidity, high-temperature resistance, and humidity resistance, based on product needs and the processing environment.
• Consult your material supplier to understand the processing performance and application range of the adhesive.

3. Adjust Coating Amount

• Adjust the adhesive coating amount according to seasonal changes. In summer, reducing the amount slightly can help lower the risk of adhesive overflow.
• For special labels (e.g., tire labels), even with the addition of flow inhibitors, the coating amount should still be monitored.

4. Optimize the Die-Cutting Process

• Use sharp cutting tools during the die-cutting process to avoid blunt blades squeezing the adhesive.
• Control die-cutting pressure to prevent excessive or insufficient pressure from causing adhesive overflow.

5. Pay Attention to Material Transportation and Storage

• During transportation, avoid exposing adhesive materials to high temperatures for extended periods.
• Store materials in cool, dry, and well-ventilated areas.

6. Regular Inspection and Maintenance

• Regularly inspect the die-cutting and printing equipment to ensure it is in good working condition.
• Clean any glue residue from the equipment promptly to avoid impacting subsequent processing.

In Summary

Adhesive overflow can negatively impact product quality and appearance, and high-temperature, high-humidity environments in the summer can exacerbate this issue. Therefore, when producing adhesive products in the summer, special attention should be paid to controlling temperature and humidity, selecting appropriate adhesives, adjusting the coating amount, optimizing the die-cutting process, and managing material transportation and storage to minimize the risk of adhesive overflow and ensure product quality.