Pigment is the main component of paint, pigments for white board paper coating are white pigments, the main purpose is to fill,Cover the uneven surface of the base paper, improve the whiteness and opacity of the paper, improve the flatness and gloss of the paper, give the paper a uniform and good ink absorption, so as to obtain good printing performance. The ideal pigment must have the following characteristics:

1.High whiteness and good opacity with strong hiding performance

2.The particle structure of the pigment should meet the coating requirements and the particle size should be appropriate. In general, the small particle size of the pigment can improve the coating whiteness, smoothness, gloss. However, the particle size is too small to affect the strength of the coating, printing is easy to cause the paste plate due to powder, but also make the viscosity of the coating increase, the fluidity of the poor.

3.The dispersion of pigments should be better. That means it is easy to disperse in water and the demand for dispersants is small so that the paint with high solid content, low viscosity, good fluidity and stability can be produced.

4.The pigment has good chemical stability and compatibility. Should be inactive, and in the paint and other components of the compatibility is better, in order to produce a good stability of the paint.

5.he wear value of the pigment is low. Low wear pigments can reduce the wear of blade knife and meyar rod, extend the service life of blade knife and meyar rod, and thus reduce the amount of defective products caused by replacing blade knife and meyar bars.

6.Free of impurities.

7.Relatively cheap.

Of course, no pigment can meet all of the above requirements at the same time, so in the actual production process, two or more pigments are often chosen to be mixed to effectively use the characteristics of various pigments.

White pigments in paper board coating process mainly aimed to increase the paper weight and whiteness,enhance paper strength and printability and increase the solid content to save energy consumption of drying.

Our company,Qingdao Jieruixin Machinery&Technology Co Ltd,is specialized in paper machine and related chemical design and manufacturing for decades.If you are interested in this product,we can offer you comprehensive solutions of paper coating.Don’t hesitate to contact us to get complicated product support in one place.