What is a comma coater?

What is a comma coater?

Introducing Comma Coater® In this method, a film is formed by letting the substrate move through a gap created between the comma roll® and the back roll. Suitable mainly for medium to high viscosity, for producing medium thickness film coating.

What is a blade coater?

A device used to apply a coating to the surface of a paper that applies a thick layer of surplus coating to a paper web (often utilizing an applicator roll) then uses a flexible blade to scrape away the excess coating, leaving a desired level amount of coating on the paper.

How does a tablet coater work?

Tablet coating machines work by applying coating ingredients in the form of a solution to a group of tablets in a bed that may move horizontally or vertically. A concurrent flow of heated air facilitates evaporation of the solvents.

How does a curtain coater work?

In curtain coating, the coating fluid forms a freely falling liquid sheet and is deposited onto a moving substrate, as shown in Fig. 2.14. No friction is involved, so the coating fluid is not forced to penetrate the substrate structures but follows its surface to form a film.

What is doctor blading technique?

common tape-casting method is called doctor blading. In this process a ceramic powder slurry, containing an organic solvent such as ethanol and various other additives (e.g., polymer binder), is continuously cast onto a moving carrier surface made of a smooth, “no-stick” material such as Teflon.

What is spin coating method?

Spin coating is a method to apply a uniform film onto a solid surface by using centrifugal force and requires a liquid–vapor interface. In a typical procedure, a liquid is placed at the center of a circular surface and is rapidly rotated to produce uniform films of 1–10 μm in thickness.

What is web handling equipment?

Web handling involves the use of industrial machinery that uses web rollers to move materials through a processing step. Common materials utilized by web handling equipment include plastic films, foils, paper, and fabrics.

What is web handling manufacturing?

What is Web Handling? Consider web handling as the process that converts material into product ready for mass production. Its advantage lies in it being an automated manufacturing method that allows materials to be processed in a continuous roll instead of one sheet at a time.

Which sealing agent is used in sugar coating?

Examples of binders used in sugar coating include polyvinyl acetate (PVA), polyvinyl pyrrolidone (PVP), carboxymethyl starch, dextrin, acacia gum, gelatin, agar-agar, sodium alginate, cellulose ethers, and starches.

What is flow coating?

Flow Coating involves spraying a component with excessive amounts of paint or lacquer, or applying streams of the coating material to it. The excess coating material that drips off is then collected, filtered and automatically reintroduced to the lacquering system.

What is the average cost of curtains?

Curtains and Drapes: Typically, drapes and curtains cost an average of $100 to $250 per panel. However, this can range between $7 to $1,500 overall, depending on how fancy you want to get.

Why is it called a doctor blade?

Doctor blades are also used in other printing and coating processes, such as flexo and pad printing for the same function. It is believed that the name derives from the blades used in flatbed letterpress equipment for blades used to wipe ductor rolls, and “ductor” became doctor.

Where is spin coating used?

Spin coating is widely used in microfabrication of functional oxide layers on glass or single crystal substrates using sol-gel precursors, where it can be used to create uniform thin films with nanoscale thicknesses. It is used intensively in photolithography, to deposit layers of photoresist about 1 micrometre thick.