You've probably seen it on your packaging line: the carton sealing machine finishes one carton type, the next SKU arrives at the feed inlet, and the line stops. A worker walks over, loosens the guide rails, adjusts the width, resets the height, tightens everything back, runs a test carton, and adjusts again. Several minutes lost per switchover. Multiply that by the number of changeovers a day, and an hour's worth of sealing output is gone. In all of this, the worker is fine, the tape is fine, and the carton is fine. The problem is the machine: it was designed to run one carton type all day, and as your order mix grows more varied, that setup stops working. Before choosing a machine, one question comes first: why water-activated tape? Traditional pressure-sensitive tape relies on surface contact. The adhesive grips the outer linerboard of the corrugated board through initial tack. But the bond stays on the surface, and under continuous load or temperature changes, surface adhesion is the first thing to fail. Water-activated tape bonds differently. Its starch adhesive penetrates the corrugated fibers and cures within the substrate. Once set, tape and carton are structurally integrated—they cannot be peeled apart without tearing a layer of board. For a modern packaging line, this fiber-level bond removes the weakest point in carton sealing. Water-activated tape also meets current environmental regulations, is fully recyclable with the carton, and provides tamper-evident closure. Fiber-reinforced water-activated tape adds tensile strength for heavier loads. This matters for machine selection: a WAT sealer integrates a water-activation system into the tape path. The machine wets the tape, applies it, and presses down the flaps—a different mechanical process from pressing a dry pressure-sensitive strip onto a carton. How to Choose the Right Machine for Your Business JL offers high-performance WAT carton sealing machines tailored to different operational needs. The table below compares the three models in the series. Item KN-1717USemi-automatic KN-1721RFully-automatic KN-2626USemi-automatic Case Sealing Speed 8-13 cases/min(Depending on case size and quality) 8-13 cases/min(Depending on case size and quality) 8-13 cases/min(Depending on case size and quality) Max Carton Size Up to 43 × 53 cm Up to 43 × 53 cm Up to 66 × 66 cm Max Load 38 kg 38 kg 60 kg Size Adjustment Manual Automatic self-adaptation Manual Changeover Downtime Minutes per changeover Near zero—machine adapts automatically Minutes per changeover Power 1.1 kW 1.5 kW 1.1 kW Water Tank Dual 2L tanks Dual 2L tanks Dual 2L tanks Tape Roll Capacity Up to 500 mm dia.(approx. 1,300 m) Up to 500 mm dia.(approx. 1,300 m) Up to 500 mm dia.(approx. 1,300 m) Machine Dimension(L × W × H) 93" × 43.9" × 65"(236 × 112 × 165 cm) 93" × 43.9" × 65"(236 × 112 × 165 cm) 128" × 53" × 70"(326 × 135 &t...