Coating coating wet-film prepative - Film Applicator

Reliable and accurate determination of Coating coatings requires accurate control of the actual thickness of Dry-Film or wet-film. In routine quality control and R & D tests, Coating hiding power, opacity, scrub resistance, Sag resistance performance and Miscellaneous quality tests all require a coating with good conformity and Repeatability. Therefore, many regulations such as ISO, ASTM, etc. require a preset coating of the same thickness. In daily production control, the commonly used prepative sample tool is the Film Applicator, which can coat the required wet film thickness coatings from a few microns to more than thousands of microns.

Currently on the market, typical Film Applicators can be divided into two types according to manual or motorized: manual Film Applicator and Automatic Film Applicator. General Film Applicators can generally be coated with ten to thousands of microns in wet film thickness, and Mayer Rods are required for smaller films. Mayer Rods can accurately produce wet-films as small as 1 μm.

The I-type Film Applicator consists of a single-sided or multi-sided groove with known depth or intermittent. When using, place it on one end of a flat plate (more stringent prepatives need to be equipped with Drawdown Vacuum Plate and Drawdown Plate), apply enough Coating sample to the front end of the Film Applicator, and then evenly drag the Film Applicator on the cardboard. In contrast, the mechanical method has better Repeatability and accuracy than manual.

The production of Film Applicator not only needs to consider the fineness of the instrument, but also needs to consider the anti-corrosion requirements. Generally, stainless steel, steel or Eletroplating iron are used in imported and CHINA. Imported products are more high-end in material selection, and of course they are better in accuracy, so the price is much higher than that in CHINA.

Generally speaking, the accuracy of the Film Applicator will increase with the number of films. If the cleaning is not clean, some samples will remain cured in the grooves. Over time, it will be difficult to apply the corresponding wet film thickness on the Spreader prepative. For the cleaning method of the Film Applicator, please refer to the "Cleaning Method" provided by NBchao. Com Mall, or you can buy a cleaning brush for cleaning, the effect is much better than manual clarity.

Coating coating wet-film preparatory - Film Applicator

Due to the volatilization of the solvent, the dry grinding thickness of Coating is often smaller than that of wet-film. Similarly, due to physical properties, the wet film thickness is always smaller than the depth of the film trench. The experimenter learned an approximate coating thickness from the specific Coating, Film Applicator and film method through event experience. Knowledge of Coating components enables the experimenter to know how to obtain the expected dry-film thickness.

In terms of industry experience, the following companies can make a preliminary estimate of the thickness of Dry-Film:

DFT = (WFT * solids%)/100