Why Does Tape Sometimes Fail in Cold Weather?

Why Does Tape Sometimes Fail in Cold Weather?

Hot melt adhesive tape is one of the most widely used carton sealing solutions due to its strong initial tack, cost-effectiveness, and suitability for corrugated boxes and paper-based packaging. However, during colder months or when stored in low-temperature environments, users may notice that the tape appears to be "faulty" or does not perform as expected.

In most cases, the tape itself is not defective. The issue is caused by temperature-related changes in the adhesive. Hot melt adhesives are designed to remain flexible and tacky under normal operating conditions. When exposed to cold temperatures, the adhesive can become rigid and lose some of its ability to flow into the microscopic pores and surface irregularities of the carton. As a result, the bond between the tape and the substrate is weakened, leading to poor adhesion, edge lifting, or cartons that do not remain securely sealed.

Cold temperatures can also affect the corrugated carton itself. If both the tape and the carton are cold, achieving a reliable bond becomes even more challenging, as the adhesive cannot properly wet out and anchor to the surface.

How Can This Issue Be Rectified?

The simplest and most effective solution is to allow either the cartons or the rolls of tape to acclimatise to a warmer environment before use. Ideally, tape should be stored and applied at room temperature. This can be achieved by moving tape rolls and cartons into a warmer indoor area or allowing them to sit in a temperature-controlled environment for several hours before use.

As the adhesive warms up, it regains its flexibility and tack, enabling it to bond more effectively to the carton surface and deliver the sealing performance it was designed for.

Best Practices for Optimal Tape Performance

In addition to allowing tape and cartons to reach room temperature, the following measures can help ensure consistent sealing performance:

• Ensure the carton surface is clean, dry, and free from dust, moisture, oil, or other contaminants.
• Store tape in a temperature-controlled environment whenever possible.
• Avoid applying tape to cartons that have been stored overnight in cold warehouses or vehicles.
• Apply firm and consistent pressure during tape application to maximise adhesive contact with the substrate.
• Rotate stock using a first-in, first-out (FIFO) approach to ensure tape is used within its recommended shelf life.

By following these simple guidelines, businesses can minimise sealing issues during winter and maintain reliable carton closure performance throughout the year.