Search for dissertations about: "high-yield pulps"
Showing result 1 - 5 of 9 swedish dissertations containing the words high-yield pulps.
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1. Light-Induced Yellowing of High-Yield Pulps. The Effect of Acetylation
Abstract : This thesis is a contribution to the understanding of the mechanism of photoyellowing of high-yield pulps. It also gives some general information about the reactivity of different functional groups in lignin towards acetic anhydride. READ MORE
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2. High strength paper from high yield pulps by means of hot-pressing
Abstract : AbstractHigh Yield Pulp (HYP), i.e. TMP, SGW or CTMP, is normally used in printing papers (News, SC and LWC) or in a middle layer on cardboard i.e. READ MORE
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3. Aspects of extended impregnation kraft cooking for high-yield pulping of hardwood
Abstract : The long-term trend regarding wood is an increase in price. Because wood contributes to a large part of production costs, the efficient utilisation of wood is greatly desired to reduce production costs for kraft pulp producers. During the 1990s, the development of improved modified kraft cooking began, which led to higher yields. READ MORE
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4. Some aspects on TCF-bleachability of softwood alkaline pulps
Abstract : The bleachability of softwood oxygen delignified pulps has been studied, i.e. the ease (requirement of bleaching chemicals) with which the pulps can be brightened to a target brightness in totally chlorine free (TCF) bleaching stages, including hydrogen peroxide, ozone and chelating agent stages. READ MORE
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5. Inhibition of light-induced colour reversion of wood-containing papers by means of coating
Abstract : The main purpose of this thesis was to find ways to maintain a low level of light‐induceddiscolouration at an increased addition of mechanical and chemimechanical pulps in coated highqualityfine paper and magazine paper grades. Current technology allows the production of highyieldpulps such as thermomechanical and chemimechanical pulps with properties suitable formanufacturing high‐quality paper or paperboard with a low basis weight. READ MORE