What are the influencing factors of uneven experimental film?

In experiments, film inhomogeneity may be affected by the following factors:

1. Spreader speed:The speed of the Spreader speed will directly affect the distribution uniformity of the Coating on the surface of the substrate. Too fast Spreader speed may cause the Coating to not fully cover the surface, and too slow Spreader speed may cause excessive accumulation of Coatings.

2. Spreader thickness:Inconsistent Spreader thickness can lead to uneven film. If the Spreader thickness control is not accurate, the Spreader thickness in some areas may be too thick or too thin, resulting in uneven film.

3. Spreader head design:The design of the Spreader head affects the uniformity of the coating. If the design of the Spreader head is unreasonable or defective, it may lead to uneven distribution of the coating on the surface of the substrate.

4. Coating properties:Coating viscosity, flowability, drying speed and other properties will directly affect the Spreader effect. If the Coating viscosity is too high or the flowability is poor, it may lead to uneven Spreader.

5. Substrate surface preparation:The surface preparation of the substrate also has an important impact on the uniformity of the Spreader. If there is dirt, grease or unevenness on the surface of the substrate, the coating may not adhere evenly.

6. Spreader environmental conditions:Spreader process environmental conditions, such as temperature, Humidity, air flow, etc., will also affect the Spreader effect. Poor environmental conditions may lead to uneven Coating drying or too fast volatilization rate resulting in uneven Spreader.

7. Operator technical level:The experience and technical level of the operator are also important factors affecting the effect of the Spreader. Operators who lack experience or skills may not be able to properly control the Spreader process, resulting in uneven film.

In summary, the experimental film unevenness may be affected by various factors such as Spreader speed, Spreader thickness, Spreader head design, Coating properties, substrate surface preparation, Spreader environmental conditions, and the technical level of the operator. In the experiment, these factors need to be comprehensively considered and corresponding measures should be taken to ensure the uniformity of the film.