What Should Be Noted in the Transportation and Storage of Polyurethane Rollers?
Polyurethane rollers are widely used in industries such as papermaking, printing, and plastic processing due to their wear resistance, aging resistance, and oil resistance. Many enterprises often purchase and stock a certain number of rollers in advance to ensure production. However, if transportation and storage are improper, even rollers with excellent performance may be damaged, affecting their service life and effectiveness. Therefore, correct transportation and storage methods are crucial.
First, during transportation, polyurethane rollers must avoid direct sunlight, rain and snow immersion, and external impact. Since the rubber layer is very sensitive to pressure, if it is squeezed by heavy objects during transportation, it is easy to cause deformation of the rubber layer or bending of the roller core. In addition, contact with acids, alkalis, greases, and organic solvents is prohibited during transportation to prevent chemical corrosion.
In terms of storage, environmental conditions are particularly critical. The appropriate storage temperature should be controlled between -10℃ and 40℃, and the relative humidity should be kept below 85%. They should be stored in a cool and ventilated place. Rollers must be kept away from heat sources, at least 2 meters away, to avoid accelerated aging due to high temperatures. At the same time, prolonged exposure to cold air should also be avoided.
To prevent damage to the rubber body, rollers should be wrapped with kraft paper or plastic film and protected with a blanket when stored. Bare storage is strictly prohibited. Rollers should not be stacked randomly, let alone leaned vertically against the wall. Instead, they should be placed on a shelf and fixed by supporting the roller journals. Since the polyurethane rubber layer is not suitable for long-term pressure, the roller body should be rotated 180 degrees every half a month to prevent structural deformation.
When taking out rollers in winter, they should first be placed in a warm environment to gradually restore their flexibility before use. For rollers stored for a long time, they need to be slightly ground before use to restore the best surface condition. During operation, pressure should be applied evenly to avoid instantaneous impact loads. If wrinkles or cracks appear on the surface of the roller, it should be stopped immediately and repaired by grinding.
When waste or idle rollers are transported to the reprocessing stage, random stacking and pressing should also be avoided, otherwise, eccentricity or bending of the roller core will lead to non-reusability. In summary, scientific and reasonable transportation and storage methods can not only extend the service life of polyurethane rollers but also ensure their optimal performance in critical processes.