Search for dissertations about: "tissue dewatering"
Showing result 1 - 5 of 6 swedish dissertations containing the words tissue dewatering.
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1. Through air drying : The influence of formation and pulp type on non-uniform drying and air flow
Abstract : The removal of water is an integral part of tissue paper production. Through air drying (TAD) is used for water removal when producing premium tissue grade products, however, at the price of higher energy demand. A better understanding of TAD may therefore lower the energy demand. READ MORE
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2. Through air drying : Thermographic studies of drying rates, drying non-uniformity and infrared assisted drying
Abstract : The removal of water is an integral part of papermaking. The drying process is responsible for a great share of the energy used in the paper machine. Premium grade tissue products are dried by through air drying. Large volumes of natural gas are burned to heat the air drawn through the paper web to achieve the drying. READ MORE
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3. Modifying kraft pulping to produce a softwood pulp requiring less energy in tissue paper production
Abstract : Modification of softwood kraft pulp by the addition of either polysulfide (PS) or sodium borohydride (NaBH4) has been shown to increase the pulp yield due to a higher retention of glucomannan. The pulps with higher yield gave a paper with higher tensile index than reference pulp, especially at lower degrees of refining. READ MORE
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4. Evaluation of Furnishes for Tissue Manufacturing
Abstract : Water removal on a tissue machine becomes progressively more difficult and expensive in each successive zone. Since a big part of the cost is allocated to the drying section, improved water removal in the wet end may lead to huge savings in the manufacturing process. READ MORE
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5. Studies of Vacuum Dewatering on Low Grammage Paper Webs
Abstract : A laboratory scale apparatus to simulate high-vacuum dewatering of low grammage paper sheets, typically for tissue products has been constructed. Vacuum level, vacuum pulse dwell time and frequency of single vacuum pulses are in the range typical for a Through Air Drying (TAD) tissue machine. The vacuum pulse dwell time was varied from 0. READ MORE