What is coating ? Why it is used ?
Answers
Answer:
please explain clearly
Explanation:
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Answer:
The coating process consists of applying a coating material to a moving web of flexible substrate.
The carrier substrate may be paper, film, or aluminum foil and the resulting material's additional properties will vary depending on the required application and on the material’s end-use.
The benefit of coating is that it delivers to the substrate enhanced aesthetic and physical properties derived from the coating material.
Explanation:
In flexible packaging, the most common types of coating are:
Varnish: to impart a clear, glossy surface to the web
Cold seal: used mainly for products where normal heat sealing cannot be used (chocolate bars, ice-creams, etc)
PVdC coating: used to improve the barrier properties of transparent films, as well as the gloss of printed films