Application of Applicator rod in dry preparation of PVDF film

Polyvinylidene fluoride (PVDF) films are widely used in microelectronics, biomedicine, and solar cells due to their excellent mechanical, chemical, and electrical properties. Compared with wet preparation, dry preparation of PVDF films has the advantages of slow evaporation rate, easy control of environmental impact and simple film-forming structure. Among them, the coating rod technology plays a key role in the manufacture of PVDF films, especially in the squeegee coating method.

Principles and Operations

The coating rod is used in the scraping method, the basic principle of which is to apply a polymer solution evenly on the substrate. The procedure is as follows:

1. The cleaned substrate is fixed to the rails, ensuring its flatness and smoothness.

2. Place the PVDF solution to be coated on one side of the substrate to ensure that the liquid is evenly distributed along the substrate.

3. The coating rod moves at a certain speed along the substrate to form a uniform wet film. By adjusting the angle and pressure of the blade, the thickness of the film can be precisely controlled.

Benefits & Applications

In the dry preparation of PVDF films, the coating rod technology has the following advantages:

• The squeegee coating method is not only suitable for experimental testing, but also suitable for large-area coating, which can quickly manufacture large batches of films to meet industrial needs.

• This technology is particularly suitable for high-viscosity solutions and can generate thick film layers, which can be adapted to a variety of application scenarios.

• By adjusting parameters such as solution concentration, scraping speed, and substrate temperature, precise control of film thickness and uniformity can be achieved.

In the dry preparation of PVDF films, the coating rod not only improves the production efficiency, but also ensures the uniformity and thickness control of the film. The application of this technology in the field of solar cells and other functional thin films demonstrates its wide range of potential and advantages. With the continuous development of coating technology, it will be possible to achieve more efficient and precise PVDF film preparation in the future.