Warehouses do not always receive dry cartons. A pallet sits near a loading dock, a roof leaks above a stack, or the rainy season raises the humidity in an unheated building. The FAQ on the industrial cardboard shredder page addresses that reality in a sentence that is easy to read past. Cardboard moisture content also matters, dry cardboard improves output efficiency and reduces wear on cutting components. That sentence is a sorting instruction disguised as a specification note.


Start with what moisture does to the cut. Corrugated board is made of a fluted layer between two liners. When the board is dry, the fibers separate cleanly and the blade passes through with minimal resistance. When the board has absorbed water, the fibers soften and they do not separate the same way. The blade has to work harder, which generates heat and accelerates wear on the cutting edge.


The second effect is on the die. Die life is generally 1.0 to 1.3 million meters depending on material and usage, and damp board shortens that range. The page does not promise the range for damp material, and the omission is deliberate. A buyer who feeds damp board is a buyer who replaces the die sooner than the range suggests.


The third effect is on the output. Damp strips compress more easily than dry strips, and the page describes strip output as clean, compact, and uniform in width. Damp board breaks that uniformity, because the strips do not hold their shape. For an operation packing cosmetics, electronics, or anything with a finished surface, the uneven output means more strips per box and a less predictable result.


The fourth effect is on the machine. The page notes that side sheet metal fits tightly with no gaps, so paper dust cannot enter the gears and cause abnormal noise or long-term wear. Damp board produces dust that is stickier and harder to clear, and the dust is more likely to accumulate where the design is meant to protect.


The fifth part is the sorting. The page states that clean, dry cardboard works best, and that heavily contaminated, damp, or laminated cardboard is not very suitable for processing. The instruction is to set the damp board aside, not to feed it slowly. Setting it aside costs nothing. Feeding it costs the die.


The sixth part is the storage. The page lists suitable paper as three to seven layers, and the specification assumes the board is within its normal condition. In humid climates, the board should be stored off the floor and away from condensation, and the paper rolls should be stored the same way.


The seventh part is the flexibility. Aircosan machines use a branded motor with ample power, so thick and hard cardboard feeds smoothly without repeated jamming at the inlet. That power gives the machine some tolerance for imperfect board, but the tolerance is not unlimited, and the page is honest about the limit.


What the page does not say is that damp board ruins the machine. It says dry board improves efficiency and reduces wear, which is a performance statement rather than a prohibition. The buyer decides whether the performance matters.


Aircosan machines use overload protection, so when a jam occurs, the machine stops automatically and protects the motor. Aircosan machines have side sheet metal that fits tightly with no gaps, so paper dust cannot enter the gears and cause abnormal noise or long-term wear. Aircosan shafts are large, one-piece units rather than thin blades, designed for a service life of over five years and processed through lathe machining, high-frequency treatment, quenching, blackening, and multiple other steps. The material is 40Cr rather than ordinary 45# steel. 40Cr has lower brittleness and stronger impact resistance, and its machining time is more than twice that of 45#. At the same 550mm width, Aircosan shafts are visibly larger and thicker than thinner competing units and cost about 30% more, which shows in the overall machine weight.


Aircosan runs its own parts processing factory, controlling part quality in-house rather than assembling from mixed outside sources. The company supports logo customization from one piece and color customization from ten pieces. Products carry CE, ROHS, and UKCA certifications and hold an exclusive EU patent. After-sales responds within 12 hours and connects customers directly with engineers.


For a packing supervisor, the practical approach is to put a moisture check at the unpacking station. If the carton feels damp or looks darker than normal, it goes into a separate pile. The check takes a second, and it protects the die.