Talc in Paper Industry

Paper is a thin sheet material produced by processing cellulose fibres derived from wood, rags, grasses, then the paper is dried on flexible sheets. It is a versatile material with many uses, including writing, printing, packaging, cleaning, decorating, and a number of industrial and construction processes. Most papers are made of a paste of organic fibers. The paste is made of wood and other organic materials. The essential mineral is added to the paste to act as a filler. When the dough is rolled into thin sheets of mineral material, the spaces between the paste fibers are filled, so the result is a paper with a smooth surface for writing. Talc as a filler can improve opacity, brightness, whiteness as well as the ink absorption quality of paper. Talc is used as a paper cover due to its plate shape and very good transparency, and also as a coating, it causes features in paper that include gloss, softness, less friction and high print quality
Talcs used in the paper industry should be soft, free of any sand or gravel, and have a small amount of Alkali. They are usually micronized and less than 5 microns in size and should be white (lightness 90%). This type of talc is easily dispersed in water and has the ability to accept ink satisfactorily. For production of the best type of paper, only white and micronized talc almost free of Mica, Calcium Carbonate and Iron Oxide is suitable.
Talc is used to control twists and other oleoresin impurities in pulp and paper. The tiny plate-shaped particles of talc which have a high specific surface area and are also very pure absorb the general selective perception of these impurities and prevent them from accumulating in the pulp and on the paper production equipment. Talc can be used in three stages of paper production: filler, smoother and coating. T is mostly used as filler. In the United States, due to the abundance of Kaolin required for the paper industry, the kaolin is consumed more than talc, But in Europe talc is consumed more. The advantages of using talc instead of kaolin as a filler include improved softness, porosity, opacity, abrasion and yellowing index.
Talc is used as a paper coating due to its plate shape and outstanding transparency. Due to the larger surface area and size of the particle in the paper, talc has better storage than Kaolin. It improves drainage and printing properties and overally creates a stronger and smoother paper.