How to enhance the water resistance of BOPP synthetic paper?

Enhancing the water resistance of BOPP synthetic paper can be achieved in a number of ways, the following are some of the main strategies:

First, surface coating treatment

1.Waterproof coating: The surface of the BOPP synthetic paper is coated with a waterproof coating, such as wax emulsion, paraffin emulsion or other waterproofing agent. This coating can form a protective film on the surface of the paper to prevent water penetration, thereby improving water resistance. This method is simple and easy, but attention needs to be paid to the adhesion of the coating to the paper substrate and the uniformity of the coating.

2.Nanomaterials: You can consider adding nanomaterials, such as nano-silica compounds, to the waterproof coating, which can further improve the density and water resistance of the coating.

Second, internal modification

1.Additives: During the production process, a certain amount of water resistant agent or waterproof emulsion is added to the BOPP resin. These additives can be evenly dispersed in the resin and form a stable waterproof layer during the film stretching process, thereby improving the water resistance of the synthetic paper. It should be noted that the type and amount of additives need to be selected and optimized according to the specific product requirements.

2.Blending modification: The BOPP resin is blended with other resins with excellent water resistance, such as polyvinyl chloride (PVC), polyvinyl alcohol (PVA) and other resins. By blending modification, the advantages of different resins can be synthesized to improve the water resistance and other properties of synthetic paper.

Third, process optimization

1.Drawing process: Drawing process is one of the important factors affecting the properties of BOPP synthetic paper. By optimizing the drawing temperature, drawing rate, drawing ratio and other process parameters, the crystallinity and orientation of the synthetic paper can be improved, so as to improve its water resistance.

2.Post-treatment process: In the post-treatment process, such as heat setting, corona treatment, etc., can also affect the water resistance of synthetic paper. The water resistance and other properties of synthetic paper can be further improved by proper post-treatment process.

Fourth, use environment control

When using BOPP synthetic paper, it is also necessary to pay attention to the effect of the use environment on its water resistance. For example, avoiding long-term exposure to humid environments and reducing direct contact with water can extend the service life of synthetic paper and maintain its good water resistance.

To sum up, enhancing the water resistance of BOPP synthetic paper needs to start from many aspects, including surface coating treatment, internal modification, process optimization and environmental control. In practical applications, the appropriate method can be selected according to the specific needs and conditions or a combination of methods to achieve the best results.