Determination the opti mum pulping and bleaching conditions for some forest species and evaluation its papers

Abstract In recent years, environmental problems of irregular wood harvesting and shortages of raw materials made wood and paper Ind. & country to be faced serious crises. And some researchers and industry experts have led to fundamental and long-term solution for supplying raw materials to thes...

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Autores principales:	Mojtaba Goli, Saeed Mahdavi
Formato:	article
Lenguaje:	FA
Publicado:	Regional Information Center for Science and Technology (RICeST) 2018
Materias:	hardwood forest species shortages of raw materials CMP Optical and mechanical Properties Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/28cf0ce0b2b046abbe95f7dd8751a889
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spelling	oai:doaj.org-article:28cf0ce0b2b046abbe95f7dd8751a8892021-12-02T02:01:57ZDetermination the opti mum pulping and bleaching conditions for some forest species and evaluation its papers1735-09132383-112X10.22092/ijwpr.2018.110569.1409https://doaj.org/article/28cf0ce0b2b046abbe95f7dd8751a8892018-03-01T00:00:00Zhttp://ijwpr.areeo.ac.ir/article_115144_dbe68af046b7fb0f8c13aa9e1fcaf1aa.pdfhttps://doaj.org/toc/1735-0913https://doaj.org/toc/2383-112XAbstract In recent years, environmental problems of irregular wood harvesting and shortages of raw materials made wood and paper Ind. & country to be faced serious crises. And some researchers and industry experts have led to fundamental and long-term solution for supplying raw materials to these industries. This present study aimed to determine the optimum conditions of pulping and bleaching for several hardwood forest species (as a separate cooking & Combining with 40% popular, 15% beech and hornbeam 45%) and paper evaluation. After preparing CMP in accordance with the terms of an 85% efficiency , Different cooking times (25-60 minutes, temperature of 170 °C, the ratio of L TO W & 7 TO 1 and Making hand sheet with standard 60 gram per square meter, Optical and mechanical properties of paper was evaluated. The results showed that, A species that was used in cooking, Poplar were better in terms of total properties with mechanical and optical properties. Also in Bleaching stage, the tensile strength index is decreased & Burst and tear strength index is improved. The maximum brightness is related to poplar species with mixing and without species and after bleaching the beech is the lowest ones. In both methods the rate of opacity and yellowness is decreased.Mojtaba GoliSaeed MahdaviRegional Information Center for Science and Technology (RICeST)articlehardwood forest speciesshortages of raw materialsCMPOptical and mechanical PropertiesForestrySD1-669.5FAتحقیقات علوم چوب و کاغذ ایران, Vol 33, Iss 1, Pp 38-49 (2018)
institution	DOAJ
collection	DOAJ
language	FA
topic	hardwood forest species shortages of raw materials CMP Optical and mechanical Properties Forestry SD1-669.5
spellingShingle	hardwood forest species shortages of raw materials CMP Optical and mechanical Properties Forestry SD1-669.5 Mojtaba Goli Saeed Mahdavi Determination the opti mum pulping and bleaching conditions for some forest species and evaluation its papers
description	Abstract In recent years, environmental problems of irregular wood harvesting and shortages of raw materials made wood and paper Ind. & country to be faced serious crises. And some researchers and industry experts have led to fundamental and long-term solution for supplying raw materials to these industries. This present study aimed to determine the optimum conditions of pulping and bleaching for several hardwood forest species (as a separate cooking & Combining with 40% popular, 15% beech and hornbeam 45%) and paper evaluation. After preparing CMP in accordance with the terms of an 85% efficiency , Different cooking times (25-60 minutes, temperature of 170 °C, the ratio of L TO W & 7 TO 1 and Making hand sheet with standard 60 gram per square meter, Optical and mechanical properties of paper was evaluated. The results showed that, A species that was used in cooking, Poplar were better in terms of total properties with mechanical and optical properties. Also in Bleaching stage, the tensile strength index is decreased & Burst and tear strength index is improved. The maximum brightness is related to poplar species with mixing and without species and after bleaching the beech is the lowest ones. In both methods the rate of opacity and yellowness is decreased.
format	article
author	Mojtaba Goli Saeed Mahdavi
author_facet	Mojtaba Goli Saeed Mahdavi
author_sort	Mojtaba Goli
title	Determination the opti mum pulping and bleaching conditions for some forest species and evaluation its papers
title_short	Determination the opti mum pulping and bleaching conditions for some forest species and evaluation its papers
title_full	Determination the opti mum pulping and bleaching conditions for some forest species and evaluation its papers
title_fullStr	Determination the opti mum pulping and bleaching conditions for some forest species and evaluation its papers
title_full_unstemmed	Determination the opti mum pulping and bleaching conditions for some forest species and evaluation its papers
title_sort	determination the opti mum pulping and bleaching conditions for some forest species and evaluation its papers
publisher	Regional Information Center for Science and Technology (RICeST)
publishDate	2018
url	https://doaj.org/article/28cf0ce0b2b046abbe95f7dd8751a889
work_keys_str_mv	AT mojtabagoli determinationtheoptimumpulpingandbleachingconditionsforsomeforestspeciesandevaluationitspapers AT saeedmahdavi determinationtheoptimumpulpingandbleachingconditionsforsomeforestspeciesandevaluationitspapers
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Determination the opti mum pulping and bleaching conditions for some forest species and evaluation its papers

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