When using a polyurethane paper feed roller in a humid environment, the first thing to pay attention to is the adaptability of the material itself, because the moisture contained in the humid air will have a subtle effect on the roller material. Although polyurethane polyurethane paper feed rollers have a certain degree of water resistance, polyurethanes of different formulas have different stability in humid environments. When selecting, you need to confirm their hydrolysis resistance and moisture resistance level. Just like cotton clothes are prone to mold growth in humid weather, if polyurethane paper feed rollers use polyurethane materials with insufficient water resistance, they may soften, swell or even crack on the surface in a humid environment for a long time, causing the roller body to deform in roundness, and slip or deflect when feeding paper. Therefore, the material selection process needs to pay special attention to the matching degree between the material and the use environment.
Before installing the polyurethane paper feed roller, thorough drying is a preparatory work that cannot be ignored. This step is equivalent to building the first line of defense against moisture for the equipment. Whether it is a newly purchased polyurethane paper feed roller or a replaced old roller, check whether the storage environment is dry before installation. If there is water vapor or condensation on the surface of the roller, wipe it carefully with a clean, dry soft cloth to ensure that there is no moisture residue on the roller surface and the shaft core. Imagine that wet wood used directly in construction will cause structural deformation. If the polyurethane paper feed roller is installed with water, the moisture will penetrate into precision parts such as bearings during operation, which will not only accelerate metal corrosion, but also cause stress between the polyurethane surface and the internal structure due to humidity differences. After long-term operation, degumming or surface peeling problems will occur, affecting paper feeding accuracy and equipment life.
Real-time monitoring of environmental humidity during operation is the key to maintaining the normal operation of the polyurethane paper feed roller. The humid environment is not static, and humidity fluctuations will directly change the working state of the polyurethane paper feed roller. A hygrometer can be installed near the equipment to control the environmental humidity within the appropriate range of the polyurethane paper feed roller. When the humidity exceeds the threshold, the dehumidification equipment in the workshop should be started in time. This is just like the human body needs to adjust the indoor humidity to stay comfortable in humid weather. When the humidity of the polyurethane paper feed roller is too high, the surface friction will decrease due to the adhesion of water vapor, and the contact pressure between the paper and the roller surface will be insufficient, which is prone to paper feeding lag or paper skew. Especially in high-speed printing or packaging equipment, slight changes in humidity may cause continuous paper feeding failures.
Daily cleaning and maintenance are more important in a humid environment. Water vapor will make impurities such as dust and paper scraps more likely to adhere to the surface of the polyurethane paper feed roller, forming a dirt layer that affects the paper feeding effect. When cleaning, neutral detergent and soft cloth should be used to avoid using rough tools to scratch the polyurethane surface. At the same time, special attention should be paid to the gaps at the ends of the roller body and the connection between the bearings, which are prone to accumulation of wet debris. For example, if the wet floor is not cleaned in time, it will become dirtier and dirtier. If the impurities on the surface of the polyurethane paper feed roller are not removed in time, they will be repeatedly crushed during the rotation of the roller body, which will not only increase the wear of the roller surface, but also may cause the paper to be contaminated or wrinkled during transmission, affecting product quality.
Keeping the equipment running in a well-ventilated environment is an effective measure to reduce the impact of humidity. Air circulation can accelerate the diffusion of water vapor and reduce the condensation of water on the surface of the polyurethane paper feed roller. Exhaust fans or ventilation systems can be installed in the workshop, especially in the rainy season or high humidity areas, and ventilation equipment should be turned on regularly to maintain air circulation. This is like opening windows in a humid room to ventilate, which can prevent furniture from getting damp. In a well-ventilated environment, water vapor on the surface of the polyurethane paper feed roller is not easy to accumulate, and the rust rate of metal parts will also slow down. At the same time, ventilation can also take away the heat generated by the operation of the equipment, avoiding the dual effects of high temperature and high humidity from damaging the polyurethane material.
Maintenance work after shutdown should not be ignored in a humid environment. When the equipment is suspended, the polyurethane paper feed roller may continue to be in an unfavorable state due to the environmental humidity, and targeted protective measures need to be taken. After shutdown, a thin layer of protective oil (select a variety compatible with polyurethane) can be applied to the surface of the polyurethane paper feed roller, and the equipment can be covered with a waterproof and dustproof cloth to prevent water vapor from directly contacting the roller body. Just like people need to wear raincoats when going out on rainy days, polyurethane paper feed rollers also need "protective equipment" when they are shut down to avoid long-term exposure to humid air and performance degradation. Especially when the machine is shut down for a long time, it is necessary to regularly check whether the covering is intact, and start the dehumidification equipment if necessary to maintain the local environment dry.
When the polyurethane paper feed roller is found to be abnormal in a humid environment, timely troubleshooting and troubleshooting are the key to preventing the problem from expanding. Any slight abnormality may be a manifestation of the accumulation of moisture. If the polyurethane paper feed roller is found to have abnormal noise or jamming when it rotates, it is necessary to check whether the bearing is rusted due to moisture; if the paper feeding slips, it is necessary to check whether the roller surface changes the friction due to water absorption and expansion. This is like seeing a doctor in time when you are unwell. The abnormal signal of the polyurethane paper feed roller is a "reminder" for maintenance. If the treatment is delayed, it may develop from simple component rust to the scrapping of the entire roller body, which will not only affect production efficiency, but also increase maintenance costs. Therefore, it is necessary to maintain sufficient sensitivity to equipment abnormalities in humid environments to achieve early detection and early resolution.
