A study on effect of modified calcite on filler retention and mechanical properties of fluting papers

Abstract

In this study, the use of modified calcite as a filler in fluting paper production was investigated and its effects on retention and some mechanical properties of the papers were determined. Ground calcium carbonate (GCC/calcite) and cationic starch were used for modification. Filler modification with alum effect of CPAM resulted in starch-calcite encapsulation. Produced modified calcite (MC) was used in fluting paper production at certain dosages as filler. Simultaneously, paper was made with unmodified calcite (UC), and the effects of modified calcite on the paper properties and filler retention were studied. The results of this study indicated that the use of 10% MC improved filler retention and provided approximately 23% more retention than the use of 10% UC. In addition, mechanical properties and air permeability values of MC-filled papers were higher than those of UC-filled papers. With the use of MC in fluting papers production, better filler retention was achieved, while the reduction in mechanical properties caused by the addition of filler can be minimized. Besides, impurities in white water can be minimized by reducing the filler dosage given during paper production.

Application of polysaccharide based modified ground calcium carbonate in wet‐end of papermaking

“…In another literature starch was used to modify GCC filler and added it to wet-end of papermaking and showed that retention of filler, burst strength and breaking length all were improved. 34 But here in case of set A4, burst factor increased along with the ash content of the paper handsheets to 22.24 and 18% respectively when compared with set A1, A2, and A3. For tear factor, TEA index and tensile stiffness (shown in Figures 8, 9, and 10) similar trend was noticed as that in breaking length Figure 11 showed 2.66% elongation in set A4 as compared to other sets with an elongation value around 1.7%.…”

Improving the Optical Properties and Filler Content of White Top Testliners by Using a Size Press

“…Starch was used as a binder in the coating process because of its properties that make it ideal for this purpose. Starch has a high molecular weight and forms a gel when mixed with water, which helps in binding the coating pigments together and anchor them to the cellulosic fibers in the WTT paper. , This enhances the adhesion of the coating to the substrate and contributes to the overall performance of the coated WTT papers.…”

“…The need for alternative sources of fiber and more sustainable production methods is becoming increasingly pressing in light of the global fiber shortage. 1 This has been noted by various studies. 2−4 The use of fillers in paper production is becoming increasingly popular as papermakers look for alternative and cost-effective ways to reduce the cost of cellulose and fiber.…”

“…Sources such as pine forests are needed to meet the demand for cellulose, but the large amount of capital required to produce it is a limiting factor in its production. The need for alternative sources of fiber and more sustainable production methods is becoming increasingly pressing in light of the global fiber shortage . This has been noted by various studies. − …”

“…Paper producers are seeking alternative materials to lower cellulose-related paper and packaging costs. As a result, the fillers used to improve the characteristics of paper are critical. ,, Nonfiber inorganic materials are preferred over fibrous materials because they lower manufacturing costs and allow for faster drying than fibrous raw materials, hence boosting output. , Many industrial raw materials are evaluated and employed in the papermaking process for two purposes: filling and coating. Some pigments are only used for filling or coating, whereas others may do both …”