Below 5 °C, pressure-sensitive tape loses adhesion and returns fail in the cold chain. This guide covers sealing strategies for freezer lines.
The cold-chain sealing problem
Pressure-sensitive tape relies on adhesive flow to bond. Below about 5 °C, that flow slows dramatically; returns and split seams spike in freezers. For frozen food, the seal must survive -25 °C warehouse and transit conditions.
Hot-melt: formulated for cold
Hot-melt adhesives are formulated with the temperature range in mind. Applied at high temperature, they wet out the board surface and re-solidify into a strong bond that remains secure at freezer temperatures.
Condensation management
Cold corrugate condenses moisture, which weakens any adhesive bond. YanMao's hot-melt stations use moisture-tolerant adhesive formulations and pre-heat zones that dry the flap surface before application.
The YM-250 approach
Our YM-250 hot-melt case sealer applies top and bottom seals with dual glue stations, sustains 25 cases/min, and includes low-melt-warning alarms so a cold-chain line never runs under-sealed.
When tape is still right
For dry, room-temperature warehouses, modern tape is perfectly adequate and cheaper. We recommend hot-melt only where the chain is genuinely cold — and help you make that call honestly.