Seyed atefe Nasiri; ahmadreza saraeyan; Ali Ghasemian; Ghasem Asadpour Atoi
Abstract
The strength properties of medium corrugated board which is made using recycled pulp are always important. The aim of this study was to investigate the effect of bulking agent’s addition and acetylated starch on the strength properties of corrugated board from neutral sulfite semi-chemical and ...
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The strength properties of medium corrugated board which is made using recycled pulp are always important. The aim of this study was to investigate the effect of bulking agent’s addition and acetylated starch on the strength properties of corrugated board from neutral sulfite semi-chemical and old corrugated container pulp. For this purpose, the pulp was treated with two materials separately including tri (propylene glycol) butyl ether and di (propylene glycol) butyl ether bulking agents in the 0.9% dry weight of the pulp level. In addition, each of these bulking agents was added with acetylated starch (at the level of 4% of dry weight of the pulp) to the pulp suspension. The strengths properties of corrugated board were measured. The results showed that the corrugated board treated by tri (propylene glycol) butyl ether and di (propylene glycol) butyl ether bulking agents had the highest bulk and thickness in comparison to other samples. Also, the strength properties of samples decreased by adding bulking agents. Acetylated starch was used to improve the strengths of samples. Addition of acetylated starch with bulking agents improved the strengths of samples. Corrugated board with tri (propylene glycol) butyl ether and acetylated starch showed highest tensile, burst, tear strengths, stiffness, CMT and RCT. Results showed that the effect of different treatments is statistically significant in all trials.
Pulp and paper
ali barzan; hossein resalati; ali ghasemian; ahmadreza saraeyan; ghasem asadpour
Abstract
In this study, the effect of pigment composition on the properties of paper prepared from CMP pulp was studied. There for 3 different pigment combinations (100% calcium carbonate (GCC), 70% calcium carbonate and 30% kaolin clay (70GCC30Clay) and 70% calcium carbonate and 25% gritty and 5% titanium dioxide ...
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In this study, the effect of pigment composition on the properties of paper prepared from CMP pulp was studied. There for 3 different pigment combinations (100% calcium carbonate (GCC), 70% calcium carbonate and 30% kaolin clay (70GCC30Clay) and 70% calcium carbonate and 25% gritty and 5% titanium dioxide (70GCC25Clay5TiO2)) were made with anionic starch, latex and dispersersant and Used for coating. Physical properties included (surface roughness of the paper, Ash content and Apparent density) And the optical properties included (brightness, absorption and diffusion coefficient) and paper resistance characteristics including tensile strength, bursting resistance, tear strength based on standard TAPPI standardized measurements and Using factorial design, analysis of variance was performed and the mean of paper properties was compared with Duncan's test. The purpose of this research is to achieve the best combination for coating the paper with the improvement of physical and optical properties and maintaining resistance properties. By adding clay and dioxide titanium to calcium carbonate, the roughness of the paper surface decreased The highest roughness of the surface of the paper in the diet was observed for the control paper and the lowest was seen in the treatment of 70GCC30Clay surface. Also, the highest degree of brightness is related to 70GCC25Clay5TiO2 treatment. The highest index of tensile strength and burst strength index was related to gypsum treated paper (GCC) and also the highest tear strength index for treated paper at level 2 (70GCC30Clay).
