The wet film preparer is an instrument used to scrape samples to prepare a film of a certain thickness. It is mostly used in laboratories, especially for scraping samples of paint inks, paints, and varnishes.
General wet film preparers can be divided into single-sided wet film preparers, multi-sided wet film preparers , and adjustable preparers. In terms of style, it can be divided into I-shaped wet film preparer, frame wet film preparer , and square wet film preparer . The width of the coating film is also relatively large, but generally the width of the coating film can go to about 300mm. Under normal circumstances, there are mainly 100mm, or 75mm. 78mM, 80Mm and 90mm, the thickness of the coating film refers to the wet film thickness, and the adjustable applicator can reach a film thickness of 5mm, of course, its accuracy will be slightly worse.
If the integrated single-sided Film Applicator is fixed, it can reach a coating film of about 300 microns or 200 microns, and the mainstream ones are 25-50-75-100-150-200 microns. The multi-sided Wet Film Applicator generally has four sides, that is to say, there are 4 different film thicknesses. The multi-sided Wet Film Applicator is also based on a single side, combining several coating film thicknesses, which is equal to 4 in 1 .
In terms of the accuracy of the Wet Film Applicator, the imported accuracy can reach plus or minus 2 microns (with a calibration certificate), or 3 microns. Regular domestic manufacturers can reach 3 to 5 meters, or 10 microns with a large range, generally relatively low-end. For example, if it is sold on a certain treasure, there are no such so-called precision marks.
The standard import aspect that the wet film preparer follows is mainly. ASTM D302 standard and ASTM D823 standard. Domestic production mainly follows the standard GB/T1727.
The Wet Film Applicator is generally made of stainless steel. Mainstream 440 stainless steel, with some hardening, or anodized aluminum, which is mainly used for adjustable Film Applicators.
How is a wet film preparer different from a wire Bar Coater? This is a question often encountered by customers. The North and South Tide will talk about it in detail here. Nowadays, Film Applicators are generally made of relatively thin ones, such as a few microns or more than ten microns, because their accuracy is relatively high, while Wet Film Applicators are relatively less accurate than wire rods. The applicator is that high. But the wet film preparer has an advantage, because it is not concave, so the wet film preparer is used when coating specific materials, such as fluids with relatively high viscosity, because if a wire Bar Coater is used, It will scratch, but not if it is scraped with a wet film preparer, for the simple reason that the scraper blade of the wet film preparer is straight. In addition, from the cost point of view, the adjustable Film Applicator can freely adjust the film thickness, while the wire bar or single-sided Applicator only has one film thickness. If you want to prepare a variety of different film thicknesses, you have to buy Another type of wire rod will be much more expensive in terms of cost, but its accuracy will be relatively more accurate. This is the main difference between the two.
To sum up, the wire Bar Coater can be used to scrape some very fine film layers, and it is selected when there are strict requirements on film thickness. The wet film preparer is mainly used as a tool for which the precision is not so high, or if the wire Bar Coater cannot be used to scrape the sample, scratches will appear, such as for some thicker fluid scraping samples.
