Search for dissertations about: "wrv"

Found 3 swedish dissertations containing the word wrv.

  1. 1. Manufacture of straw MDF and fibreboards

    University dissertation from Sundsvall : Kopieringen Mittuniversitetet

    Author : Sören Halvarsson; Mittuniversitetet.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rice; Wheat; Straw; MDF; HDF; UF; MUF; MDI; Non-resin; binderless MDF; Ash; Silicon; SEM; Hot-pressing; MOR; MOE; IB; Thickness swelling; MDF properties; fibre swelling; WRV; Refining; Defibration.; NATURAL SCIENCES; NATURVETENSKAP; TECHNOLOGY Chemical engineering; TEKNIKVETENSKAP Kemiteknik; TECHNOLOGY Chemical engineering Chemical process and manufacturing engineering; TEKNIKVETENSKAP Kemiteknik Kemisk process- och produktionsteknik;

    Abstract : The purpose of this thesis was to develop an economical, sustainable, and environmentally friendly straw Medium Density Fibreboard (MDF) process, capable of full-scale manufacturing and to produce MDF of requested quality. The investigated straw was based on wheat (Triticum aestivum L.) and rice (Oryzae sativa L.). READ MORE

  2. 2. Model studies of cellulose fibers and films and their relation to paper strength

    University dissertation from Stockholm : Fiber- och polymerteknologi

    Author : Susanna Fält; KTH.; [2003]
    Keywords : absorption; carboxymethyl cellulose; cellulose fibers; dissolving pulps;

    Abstract : The objectives of this work were (i) to develop a new methodfor the preparation of thin cellulose model films, (ii) to usethese model films for swelling measurements and (iii) to relatethe swelling of fibers and films to the dry strength ofpaper.In the new film preparation method, NMMO(N-methylmorpholine-N-oxide) was used to dissolve cellulose andDMSO (dimethyl sulfoxide) was added to control the viscosity ofthe cellulose solution. READ MORE

  3. 3. Fundamental Aspects on the Re-use of Wood Based Fibres Porous Structure of Fibres and Ink Detachment

    University dissertation from Stockholm : Fiber- och polymerteknologi

    Author : Jennie Forsström; KTH.; Mittuniversitetet.; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Other technology Environmental engineering; TEKNIKVETENSKAP Övriga teknikvetenskaper Miljöteknik; Environmental technology; Miljöteknik; TECHNOLOGY Chemical engineering; TEKNIKVETENSKAP Kemiteknik;

    Abstract : In this work, different aspects on the re-use of wood based fibres have been studied, focusing on ink detachment of flexographic ink from model cellulose surfaces and changes in porous structure of kraft fibres following different treatments. New model systems for evaluation of ink detachment and ink-cellulose interactions were used. READ MORE