Print Version

Paper coating is basically a starch slurry with a high percentage (up to 70%) of finely ground clay mixed in. Some paper coatings may also include small amounts of other materials such as titanium dioxide (extremely abrasive), methyl ethyl ketone, latex, toluene and alcohol.

Viscosity: In the 20,000 cPs. range as measured on normal viscosity testing equipment. Liquid is shear thinning. The estimated viscosity as it passes through the pump is in the range of 2,000 cPs. Use of 2,000 cPs. for determining capacity and horsepower gives reasonable results.

Sp. Gr.: Varies from 1.3 to 1.7

Remarks: Paper coating provides the "slick" surface to paper stock used for magazines. Coating is normally applied by blade coaters.

Pump Notes: Stainless steel construction is frequently used to maintain product color and purity. Buna n elastomers are recommended. Paper coating is abrasive and a mechanical shaft seal and pump design must be selected that are suitable for handling abrasives.  

See also:  Pulp & Paper