Many people not only focus on the aesthetic appeal and logistics performance of packaging products, but also on their heat-seal strength. Since the heat-seal strength of packaging products directly impacts packaging speed, transportation, and sales, what factors influence the heat-seal strength of environmentally friendly shrink wrap films?

The heat-sealing temperature of environmentally friendly shrink wrap directly affects the heat-seal strength of plastic composite packaging products.

2. The heat-sealing time for automatic packaging machines or old-style bag-making machines is determined by the machine speed. With constant heat-sealing temperature and pressure, the longer the heat-sealing time, the stronger the bond between the heat-sealed layers. However, if the heat-sealing time is too long, the sealed area of the composite film may develop wrinkles and unevenness, severely affecting the product's appearance quality.

To ensure the heat-seal strength of plastic composite soft packaging, adequate heat-seal pressure is essential. Therefore, it is required that the heat-seal pressure be moderate and even during the heat-sealing process. Insufficient or uneven heat-seal pressure in the environmentally friendly shrink film can result in bubbles and poor welding at the heat-sealed area, leading to inadequate heat-sealing.