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Foam-assisted web forming and chemical application technologies have great potential to improve manufacturing efficiency and product quality in the paper and nonwovens industries. In this study, the benefits of foam forming and foam-assisted application of chemicals were demonstrated in a pilot machine trial. Uniform high-bulk webs of unrefined bleached softwood kraft pulp (BSKP) and viscose fibers were manufactured by foam forming. It was shown that foam formed low-grammage and high-bulk viscose fiber webs can be strengthened by foam-assisted application of latex onto the wet web. Correspondingly, foam-assisted application of carboxymethyl cellulose (CMC) and anionic polyacrylamide (A-PAM) improved the strength of the foam formed low-grammage and high-bulk BSKP web. Overall, the pilot machine results indicated that material cost savings could be achieved and a high-performance product could be manufactured with foam-based technologies.

Renewable and bio-based materials have gained great interest on an industrial scale owing to environmental issues. Paper industries also are constantly exploring bio-resources for intrinsic chemico-physical property enhancement of paper and paper products. These bio-resources will potentially increase their cyclability besides making paper compatible beyond traditional uses. Mechanical beating or use of chemical additives or the combination of these methods are widely used to improve critical paper characteristics such as strength, surface smoothness, density, brightness, filler retention, water and grease resistivity etc. These chemical additives as mill effluents are hazardous and have detrimental effect on environment. So, to move ahead of traditional practices, the present review discusses about the production and utility of abundantly available renewable bio-polymers and their products such as starch, cellulose, plant-based proteins, microbial biopolymers, animal-based biopolymers, and natural gums etc. They represent ample prospect in terms of research and development on their functionality and industrial applications.

25th International Mining Congress of Turkey: New Trends in Mining, IMCET 2017 Ultra-fine ground calcium carbonate is widely utilized as a performance mineral in rubber, plastics and paper industries. Both micronized calcium carbonate and a chemical (sodium oleate) treated calcium carbonate products, obtained in the aqueous solution, were used in the experiments. The color property is an important factor that affects the acceptability of the industrial mineral products. The current study describes the relationship between micronized calcium carbonate and coated calcium carbonate on the basis color parameters (L?, a?, b?), whiteness index (WI), saturation index (SI), hue angle (H) and total color difference (?E). The results showed that the processing variables (chemical dosage) did not have a significant effect on the color parameters of hydrophobic calcium carbonate products.

In this study, solid lignin produced from lignin liquor which is a waste of paper industry, and Sb 2 O 3 , MnSO 4 ·H 2 O, K 2 (SbO) 2 C 8 H 4 O 10 ·3H 2 O and FeSO 4 ·H 2 O were investigated in terms of their reducing effect on Cr(VI) and other effects on cement properties. Test results revealed that Sb 2 O 3 and MnSO 4 ·H 2 O are able to reduce Cr(VI) effectively when they were used at levels of 0,02% and 0,25% by weight of cement respectively and these amounts in cement did not cause any negative effect on concrete properties of cement. Also, they performed stable reducing effects when exposed to high temperature tests and shelf life tests and it is concluded that they can be used conveniently to reduce Cr(VI) in cement industry.

valuable products. For the current products the technologies enabling the reduction of the raw material consumption and improvement of the energy and water efficiency are under great interest. This is a challenging goal since the quality of the end product should simultaneously remain intact. In a water-laid process the challenge to improve formation comes bigger when the fiber length increases. To date the only solution has been to move towards more diluted conditions i.e. to decrease the forming consistency when utilizing long natural or man-made fibers. However, when using foam as a carrier fluid flocculation of fibers is decreased and fiber length can be increased. This paper will show some results on foam forming studies that have been performed with long fibers in realistic process conditions at VTT's pilot environment. Our scope is on long-fiber suspensions that can still be run on existing paper machine geometries. The average fiber length and foam density were the main variables in these trials. The formation of papers made of short fibers was always very good. For longer fibers the formation improved with decreasing foam density and was much better than that of water-laid samples.