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The Kappa number is determined by ISO 302:2004. [1] ISO 302 is applicable to all kinds of chemical and semi-chemical pulps and gives a Kappa number in the range of 1–100. The Kappa number is a measurement of standard potassium permanganate solution that the pulp will consume. The measurement is inflated by the presence of hexenuronic acids in
In January 2018, the company acquired Plymouth Packaging, Inc. [14] Later that month, WestRock announced that it would acquire rival pulp and paper company Kapstone. The deal closed in November of 2018. [15] [16] The company ranked 194th on the 2018 Fortune 500 of the largest United States corporations by revenue. [17]
It merged with Kappa Packaging in 2005, changing its name to Smurfit Kappa, [8] and was the subject of an initial public offering in 2007. [9] In 2012 it bought Orange County Container, a US-based packaging company, for $340 million. [10] In 2016 it acquired two Brazilian Companies for €186 million. [11]
The pulping of wheat straw with 40% mixtures of acetone or ethanol with water requires 60 minutes at 180 °C to give good pulp properties. [4] Organic solvents are almost always used as a mixture with water for process considerations such as reducing the vapour pressure and lowering the pH in order to also solubilise hemicellulose.
Dissolving pulp is mainly produced chemically from pulpwood in a process that has a low yield (30 - 35% of the wood). This makes up of about 85 - 88% of the production. [2] Dissolving pulp is made from the sulfite process or the kraft process with an acid prehydrolysis step to remove hemicelluloses. For the highest quality, it should be derived ...
A roll of kraft paper. Kraft paper or kraft is paper or paperboard (cardboard) produced from chemical pulp produced in the kraft process.. Sack kraft paper (or just sack paper) is a porous kraft paper with high elasticity and high tear resistance, designed for packaging products with high demands for strength and durability.
Cacia Pulp and Paper Mill, [211] [212] Figueira da Foz Pulp and Paper Mill, Figueira da Foz [211] [213] Setúbal Pulp and Paper Mill, Setúbal [211] [214] Altri Celbi, Celulose Beira Industrial S.A, Figueira da Foz Caima-Indústria de Celulose S.A., Constância Celtejo, Empresa de Celulose do Tejo, S.A., Vila Velha de Ródão
Mechanical pulping is the process in which wood is separated or defibrated mechanically into pulp for the paper industry. The mechanical pulping processes use wood in the form of logs or chips that are mechanically processes, by grinding stones (from logs) or in refiners (from chips), to separate the fibers.