Surface coating technology is one of the most commonly used moisture-proof treatment methods for paper pallets. By coating a layer of moisture-proof material on the surface of paper pallets, it can effectively prevent direct contact between moisture and paper. Common coating materials include paraffin, resin, polyvinyl alcohol, etc. Paraffin coating can form a dense wax film on the surface of paper pallets, and block the intrusion of external water vapor by virtue of the good waterproofness of paraffin itself. Resin coating has good flexibility and adhesion, can fit closely to the surface of paper, form a continuous waterproof barrier, and also enhance the wear resistance and mechanical strength of paper pallets. Polyvinyl alcohol coating has a certain film-forming property, which not only plays a moisture-proof role, but also has the advantages of environmental protection and degradability. These coating materials can be evenly coated on the surface of paper pallets by spraying, pouring, roller coating, etc. The operation is relatively simple and the cost is relatively controllable. They are widely used in moisture-proof treatment of various paper pallets.
Waterproofing agent impregnation treatment is also an important method to improve the moisture-proof performance of paper pallets. This technology is to immerse the paper pallet in a solution containing a waterproofing agent so that the waterproofing agent penetrates into the paper fiber. Commonly used waterproofing agents include silicone waterproofing agents, acrylate waterproofing agents, etc. Silicone waterproofing agents can react chemically with paper fibers to form a hydrophobic film on the fiber surface, changing the surface properties of the paper and making it have a good water-repellent effect. Acrylic waterproofing agents form a polymer network structure between paper fibers, fill the pores between fibers, and prevent water penetration. After being impregnated with waterproofing agents, the paper pallet not only has waterproof properties on the surface, but also protects the internal fibers, and its moisture-proof ability is significantly improved. It is especially suitable for paper pallets that are stored or circulated for a long time in a humid environment.
Lamination treatment provides more comprehensive moisture-proof protection for paper pallets. This technology covers a layer of plastic film on the surface of the paper pallet, such as polyethylene (PE) film, polypropylene (PP) film, etc. The film is tightly attached to the paper pallet through hot pressing or adhesive to form a complete sealing structure, which fundamentally isolates the external moisture. The paper pallet after lamination treatment not only has excellent moisture-proof performance, but also effectively prevents dust and stains from being contaminated, while enhancing the mechanical strength and wear resistance of the pallet. In addition, the laminating process can also choose transparent film or color film according to actual needs, and realize the personalized identification and beautiful display of the product on the basis of meeting the moisture-proof function. However, the laminating process will increase certain production costs, and the film needs to be separated from the paper during recycling, and the processing process is relatively complicated.
The application of nanotechnology has brought new breakthroughs in the moisture-proof treatment of paper pallets. The special properties of nanomaterials, such as nano-silicon dioxide and nano-calcium carbonate, can be used to modify paper pallets. Nanomaterials have extremely high specific surface area and surface activity, and can be evenly dispersed in paper fibers, filling the tiny pores between fibers to form a nano-level waterproof barrier. At the same time, nanomaterials can also physically or chemically react with paper fibers to enhance the bonding force between fibers and improve the density and strength of paper. The paper pallet treated with nanotechnology not only greatly improves its moisture-proof performance, but also improves the mechanical properties and aging resistance of the pallet to a certain extent, showing good comprehensive performance advantages, which is an important development direction of future paper pallet moisture-proof treatment technology.
The composite structure design enhances the moisture-proof performance of the paper pallet from the overall structural level. By compounding materials with different properties, such as compounding a plastic layer with good waterproof performance with a paper layer, a multi-layered paper pallet is formed. A common sandwich structure is plastic-paper-plastic, where the middle paper layer provides load-bearing capacity and the upper and lower plastic layers play a moisture-proof protection role. In addition, a structure of a honeycomb paper core and a waterproof panel can be used. The honeycomb paper core provides good compressive strength, and the waterproof panel resists the erosion of external moisture. This composite structure design not only improves the moisture-proof ability of the paper pallet, but also optimizes the mechanical properties of the pallet, so that it can still maintain a stable load-bearing capacity in a humid environment, and is suitable for logistics and transportation scenarios with high requirements for moisture-proof and strength.
The development of bio-based moisture-proof materials provides a new way for environmentally friendly moisture-proof treatment of paper pallets. With the enhancement of environmental awareness, bio-based moisture-proof materials based on natural renewable resources have gradually attracted attention. For example, moisture-proof coatings or films are prepared using natural polymer materials such as starch, cellulose, and chitosan. These bio-based materials have good biocompatibility and degradability. By modifying them, the materials can be given excellent waterproof properties. Applying bio-based moisture-proof materials to paper pallets can not only meet the moisture-proof needs, but also meet environmental protection requirements, reduce environmental pollution, and comply with the concept of sustainable development. It is an important trend in the development of moisture-proof treatment technology for paper pallets in the future.
In addition to the above technical means, in practical applications, it is also necessary to combine scientific storage and use management to further improve the moisture-proof effect of paper pallets. In the storage process, paper pallets should be stored in a dry and ventilated environment to avoid direct contact with the ground. Pads can be used to suspend the pallets to reduce the impact of ground moisture. During use, try to avoid exposing paper pallets to humid environments for a long time. If transported in rainy days, protective measures should be taken to cover them. At the same time, regularly inspect paper pallets, promptly detect signs of moisture and take corresponding treatment measures, such as drying or replacement. By combining technical treatment with management measures, the moisture-proof performance of paper pallets can be improved in all aspects, their service life can be extended, and the safety and efficiency of logistics and transportation can be guaranteed.
