The necessity of spraying plastic boxes can be considered from the following aspects:
1. **Aesthetics**: Spraying can give plastic products a more beautiful appearance. By applying a layer of paint film, plastic boxes can have higher gloss and more uniform color, thereby enhancing their overall visual effect.
2. **Durability**: Spraying can improve the weather resistance and corrosion resistance of plastic boxes. The spraying process can enhance the durability of plastic boxes by forming a solid paint film on the plastic surface, so that it can maintain good performance under various environmental conditions.
3. **Protectiveness**: Plastic spraying can be used as a protective measure to prevent plastic boxes from corrosion or wear. For example, plastic spraying can be used for anti-corrosion treatment of the surface of equipment steel structures and their components.
4. **Functionality**: Spraying can also provide specific functions for plastic boxes, such as waterproofing and rust prevention. By choosing the right coating and spraying process, plastic boxes can play a better role in specific environments.
5. **Environmental protection**: Under the current environmental protection situation, the use of dry spraying can reduce the pollution generated during the spraying process. Dry spraying can effectively separate paint mist and reduce the emission of organic waste gas, thereby reducing the harm to the environment and human health.
6. **Process advantages**: The spraying process has the advantages of simple operation and low cost. For example, the electrostatic spraying process does not require thinners, the construction is pollution-free to the environment, non-toxic to the human body, the coating has excellent appearance quality, strong adhesion and mechanical strength.
7. **Surface treatment**: For plastic boxes made of non-polar materials, surface treatment is required before spraying to improve the adhesion of the paint. Common treatment methods include grinding, flame treatment or treatment with a treatment agent.
In summary, the necessity of spraying plastic boxes is mainly reflected in improving aesthetics, durability, protection, functionality, environmental protection and process advantages.