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Question:

what's the function of coated paper board ?

nan

Answer:

General packaging which you tounched smoothly is used the laminated paper board, and on the surface it has packaging film, however, food, gifts, wine boxes and other packaging is flat, smooth, and not easy to fade, and waterproof.
the membrane paper in the great plan is a composite material coating on the paper surface by the casting machine coated the plastic particle, and the main feature is that the composite material can be oil proof, waterproof (relative), and can be heat seal.
Its specific purpose is used as the packaging film.

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