Why Surface Application or Coating Is Essential For Paper Manufacturers

Surface application or coating has always been a significant step for paper manufacturers. A coated paper is one that undergoes a surface treatment during which it is coated with a coating mixture. To elaborate, the surface application involves coating the surface of a flexible or sturdy support using a liquid coating mix, aqueous materials, plastics, etc. 

Manufacturers often make use of a wire bar coater to do a uniform coating on the paper’s surface. Once the surface coating is done, the paper gets the following benefits. 

Benefits of Surface Coating

This surface treatment results in a transformation of the paper. The following benefits could be witnessed post-coating.

• A modification in the aesthetic properties and appearance of the paper and the addition of qualities like shine, printability, solidity, etc. 

• Improvement in the technical properties of the material as it gains smoothness, water resistance, fire resistance, and other aspects.

• Improvement in the ability of the material to become suitable for most kinds of printing.

How is the coating mixture prepared?

The coating mixture plays a major role, other than the instrument used, to get a uniform coating. The following ingredients form the coating mixture:

• Water: To make the mixture

• Pigments (basically, minerals): To lend the mixture good coverage and greater opacity, gloss, and whiteness to the paper. 

• Binders or Bonding Agents: To allow the components to stay mixed and avoid phenomena like poor adhesion and dusting of the layer to the paper.

• Additives: For additional properties.

How does uncoated differentiate from coated paper?

Unlike coated paper, uncoated paper is derived directly from machine made process of paper production. This paper, such as an A4 paper sheet, is usually made from cellulose fibers. Before the surface application is done on this paper, it is calendared. As a result, the paper gets smooth and improved appearance. 

Conclusion

Surface coating is truly effective for the paper quality and appearance, hence manufacturers must ensure this step. To invest in coating instruments, paper testing waxes, and other printability testing machines, you can always resort to UEC. Visit the website today.