Talc in Paper Industry


Paper industry consolidation, along with a changing printing industry landscape and a renewed focus on the improvement of paper mill ; is forcing papermakers to increase productivity. Unable to pass on increased costs to customers, paper companies are responding by optimizing machine efficiency and reducing paper waste .Talc, as a functional pigment, continues to gain momentum in paper coatings as a viable approach to achieve necessary productivity improvement The paper industry being the largest consumer of talc uses it extensively for various purposes. The process of manufacturing paper requires the use of talc as a filler that gives paper its silky, porous, and opaque surface. It is a component that keeps a check on the pitch and stickiness to avoid wear .and tear on paper machines owing to its hydrophobic nature.

 

 
  
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Talc has environmental benefits as well since it removes contaminants from paper and pulp without the use of chemicals or chemical cleaning methods. This indicates that wastewater is purer and requires less chemical oxygen (COD). The manufacture of recycled paper is facilitated, and energy usage is decreased. Talc is extracted along with the pulp, allowing the company to function more effectively in closed-circuits as compared to chemical pitch-control solutions that contaminate the process water. It aids in raising production and quality in specialized materials like colored papers and labelling.




The uses of talc as a paper filler are suitable for rotogravure printing process. Two things are very important for rotogravure paper; paper smoothness and good spool formation. As talc is a flat-like particle, it helps improve the paper smoothness. The low coefficient of friction of talc helps to produce a large spool with constant tension. We supply high-quality paper-grade talc with remarkable barrier qualities of higher aspect ratios that reduce the amount of water vapor, minimize the issue of crepe wrinkles and core bursts, and aid in efficient ink transfers which enhance image quality in the paper machinery. Talcum powder is an ideal ingredient to utilize for barrier coatings because of its barrier and water-repellent properties. Talc’s combination of platy structure, softness, organophilic, hydrophobicity, and chemical inertness makes it unique among all minerals. Talc provides opportunities to improve profitability by utilizing these properties in several niche paper coating applications, such as rotogravure, matte offset, barrier, and labels.



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Talc is utilized by the paper industry in both coated and uncoated gravure, where it increases printability and lowers surface friction, boosting output at the paper factory and printing shop. Additionally, they enhance the mate look and lessen ink smudge. By extracting any adhesive resinous bits in the pulp onto their platy surfaces, talc is used as a pitch control agent to “clean” the entire manufacturing process and stop the aggregation and accumulation of this sticky material.

Talc has environmental benefits as well since it removes contaminants from paper and pulp without the use of chemicals or chemical cleaning methods. This indicates that wastewater is purer and requires less chemical oxygen (COD). The manufacture of recycled paper is facilitated, and energy usage is decreased. Talc is extracted along with the pulp, allowing the company to function more effectively in closed-circuits as compared to chemical pitch-control solutions that contaminate the process water. It aids in raising production and quality in specialized materials like colored papers and labelling.




The uses of talc as a paper filler are suitable for rotogravure printing process. Two things are very important for rotogravure paper; paper smoothness and good spool formation. As talc is a flat-like particle, it helps improve the paper smoothness. The low coefficient of friction of talc helps to produce a large spool with constant tension.

We supply high-quality paper-grade talc with remarkable barrier qualities of higher aspect ratios that reduce the amount of water vapor, minimize the issue of crepe wrinkles and core bursts, and aid in efficient ink transfers which enhance image quality in the paper machinery. Talcum powder is an ideal ingredient to utilize for barrier coatings because of its barrier and water-repellent properties. Talc’s combination of platy structure, softness, organophilic, hydrophobicity, and chemical inertness makes it unique among all minerals. Talc provides opportunities to improve profitability by utilizing these properties in several niche paper coating applications, such as rotogravure, matte offset, barrier, and labels.



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In rotogravure grades, coating talc reduces crepe wrinkles and core bursts, and allows for the production of “jumbo” rolls by lowering the coefficient of friction. The resulting benefit is an increase in productivity from reduced paper waste. In matte offset grades, talc properties help to improve matte effect (lower sheet gloss, higher print gloss), reduce ink-scuff, and provide a silky feel. In barrier coatings, talc’s platy structure and hydrophobicity allow for an improvement in barrier properties (moisture/grease barrier). Talc also eliminates anti-blocking during unwinding, while substituting for expensive materials such as mica. In label grades, talc improves productivity by extending the life of the die, therefore reducing downtime.




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. Talc 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. Kaolin generally has a lower surface area and internal porosity than calcium carbonate so interferes less with fiber-to-fiber bonding resulting in a stronger product. Talc is used principally as a coating and pitch control agent rather than as a filler pigment. Blending these two minerals together can produce a material with exactly the required specifications.





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Hanaakia talc makes excellent low-abrasion, high-retention filler grades for paper, where they:

• Provide high retention.
• Impart good mechanical properties to the paper.
• Provide fast dewatering.
• Improve wet web strength.
• Reduce drying time.
• Can be used under acid and neutral conditions.
• Reduce dye usage.
• Reduce core bursts and crepe wrinkles, improving printing press runnability.
• Improve smoothness, lowering surface friction and enabling jumbo roll production.
• Strengthen resistance to fold breaks during reel changes reducing broke levels.
• Maximize ink transfer, bringing better image quality in the halftone area and reducing missing dots.

More advantages:

• Allow increased usage of high brightness pigments including calcium carbonate – in coating formulations.
• in mills operating under alkaline conditions.
• Give low high shear viscosity, allowing higher solids and improved fiber coverage.
• Confer good coating hold-out.
• Solve ink scuff problems in papers with a high calcium carbonate content.
• Improving readability and touch.
• Provide a matte effect (lower sheet gloss, higher print gloss).
• Control ink drying speed, decreasing print mottle and improving opacity.
• Talc is an organophilic, so absorbs impurities from the process, such as pitch, resin particles. Hence, talc is used as a cleaner of the wet-end system of the paper machine.
• Talc as a coating pigment can improve the viscosity and the water retention of coating color, the compressibility of coating layer, and hence gravure printability. Talc is also well known for its larger particle size than other pigments,
• As talc is organophilic it is helps to reduce dye consumption and two-sidedness in colored paper.








Magnesium oxide
A combination of magnesium oxide is one of the most abundant compounds in Hannakia talc, accounting for over 32% of its mass. This combination is very important in the paper industry. It is used to provide moisture resistance and increase the mechanical strength of paper, and also to use atomized magnesium oxide solutions to acidify paper products.

Silica
Silica is used as an excellent filler and reinforcing agent for paper. Silica can be used by creating properties such as a matte effect, surface improvement, and abrasion
resistance in coatings. The silica in the paper cover improves the smoothness of the surface and stabilizes the ink on the paper. More than 62% of the weight of Hanaakia talc is silica.


Iron
Iron is another element that accounts for more than 5% of weight in Hanaakia talc and is widely used in the paper industry. Iron produces properties such as good electrical conductivity, relatively high melting temperature, and material texture. With the increasing use of metals, especially iron in papermaking, the role of iron is becoming more and more important, especially in the form of factory machinery and industrial writing instruments. Gift wrapping paper, tissue paper, multi-layer paper and various other papers are types of paper in which paper machines play an important role in their production.p>



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