What are the ways to improve the oil resistance of BOPP synthetic paper?

The methods to improve the oil resistance of BOPP synthetic paper mainly include the following aspects:

1. Selection of formula and additives

Use of oil resistance additives: In the production process of BOPP synthetic paper, some oil resistance additives can be added, which can form a layer of oil resistance on the surface or inside the film, thereby improving the oil resistance of the film. The selection of these additives needs to be based on their oil resistance and compatibility with PP feedstock.

Adjust the formula ratio: By optimizing the ratio of various components in the formula, especially the amount of oil resistance additives, the oil resistance of BOPP synthetic paper can be improved without significant impact on other properties.

2. Improvement of production process

Optimized drawing process: The drawing process has an important effect on the molecular orientation and crystalline structure of BOPP synthetic paper, which in turn affects its oil resistance. By adjusting the drawing ratio, drawing rate and other parameters, tighter molecular structure and higher crystallinity can be obtained, thus improving the oil resistance of the film.

Control of processing temperature: Processing temperature is also one of the key factors affecting the oil resistance of BOPP synthetic paper. Too high a processing temperature may lead to surface defects or incomplete internal crystallization of the film, thereby reducing oil resistance. Therefore, it is necessary to strictly control the processing temperature during the production process to ensure the quality of the film.

3. Surface treatment technology

Plasma treatment: Plasma treatment can improve the surface properties of BOPP synthetic paper, including increasing surface roughness and improving surface energy. These changes help to improve the bond between the film and the oil-resistant coating, thereby enhancing oil resistance.

Coating oil resistant coating: Coating an oil resistant coating on the surface of BOPP synthetic paper is a direct way to improve its oil resistance. Oil resistant coating needs to have good oil resistance and good bonding force with BOPP film. The type and thickness of the coating need to be selected according to the specific needs.

4. Material selection and modification

Choose high oil resistance PP raw materials: The production of PP raw materials with better oil resistance can improve the oil resistance of BOPP synthetic paper to a certain extent.

PP raw material modification: Through the modification of PP raw materials, such as graft copolymerization, cross-linking, etc., can improve its oil resistance. The oil resistance of the modified PP raw material has been significantly improved on the basis of maintaining the original excellent properties.

5. Environmental condition control

Storage conditions: During the storage process, avoid exposing BOPP synthetic paper to harsh environments such as high temperature and high humidity to reduce the impact of environmental factors on its oil resistance.

In summary, the method to improve the oil resistance of BOPP synthetic paper involves the selection of formula and additives, the improvement of production process, surface treatment technology, material selection and modification, and environmental conditions control. In practical applications, appropriate methods can be selected for improvement according to specific needs and conditions. It should be noted that there may be synergistic effects or mutual constraints between different methods, so comprehensive consideration and optimal combination are needed.