Essays about: "Kappa number"

Showing result 1 - 5 of 23 essays containing the words Kappa number.

  1. 1. Impact of pre-treatments on the brightness stability of a conventional and near neutral pH ECF-light bleaching sequence

    University essay from KTH/Fiber- och polymerteknologi

    Author : Ali Amirjani; [2023]
    Keywords : ECF; Bleaching; Pulp; AOX; Brightness Stability; ECF; Blekning; Massa; AOX; Ljushetsstabilitet;

    Abstract : Syftet med denna studie är att undersöka inverkan av förbehandlingar på ljushetsstabiliteten av Northern Bleached Softwood Kraft (NBSK) som har blekts enligt (OO) (OP) D/Dn (PO) bleksekvensen. Effekten av förbehandling med xylanas (X), mild sur (A), DTPA (Q) samt ett kombinerad DTPA- & xylanassteg (Q+X) har studerats. READ MORE

  3. 2. Evaluation of the RAMP Tool’s New Hand Model -Reliability, Usability and Face Validity

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Dina Burghol; [2023]
    Keywords : Hand-Intensive Work; RAMP Tool; Observation-based Risk Assessment tools; reliability; Usability; Face Validity.;

    Abstract : Hand-intensive work significantly correlates with the increased risks of developing Distal upper-extremity (DUE) Work-related musculoskeletal disorders (WMSDs), such as carpal tunnel syndrome and tendinitis. Many studies have investigated the physical risk factors and their contribution to the occurrence of the DUE WMSDs. READ MORE

  4. 3. Quantitative and qualitative analysis of dyes in pulp from recycled textiles

    University essay from KTH/Fiber- och polymerteknologi

    Author : Anna Bevin; [2023]
    Keywords : Textile fibers; Dyes; Kappa number; FTIR; UV-VIS; Textilfibrer; Färgämnen; Kappatal; FTIR; UV-VIS;

    Abstract : To decrease the environmental footprint, the textile industry needs to become more circular. One company that is trying to close the textile lifecycle loop is the Swedish company Renewcell. In the Renewcell process, discarded clothes and other textile waste are turned into a dissolving pulp that can be used for production of new textiles. READ MORE

  5. 4. Impact of pulp chemical composition and fiber morphology on hygroexpansion and strength properties of kraftliner

    University essay from Lunds universitet/Kemiteknik (CI)

    Author : Serdar Unal; [2023]
    Keywords : Chemical Engineering; Hygroexpansion; Pulp; Kraftliner; Tensile strength; Iso-brightness; Chemistry;

    Abstract : Kraftliner is the unbleached pulp used in the outermost layer of corrugated cardboard. Like other types of paper, it is produced from wood chips as a raw material. Kraftliner is known for its high tensile strength, tear resistance, compressive strength, etc., making it suitable for packaging material for heavy objects. READ MORE

  6. 5. Reactivity increasement of prehydrolysis kraft pulp from Acacia crassicarpa and Eucalyptus hybrids

    University essay from KTH/Träkemi och massateknologi

    Author : Edward Tandy; [2022]
    Keywords : Acacia crassicarpa; Eucalyptus hybrids; Pentosan removal; Pulp yield; Prehydrolysis kraft pulp; Reactivity; Acacia crassicarpa; Eucalyptushybrider; Förhydrolyserad kraftmassa; Massautbyte; Pentosan; Reaktivitet;

    Abstract : Syftet med detta examensarbete var att öka reaktiviteten hos förhydrolyserad kraftmassa genom att använda tidigare förhydrolysat och svavelsyra under förhydrolysen. Först bestämdes den kemiska sammansättningen av två olika vedråvaror (Acacia crassicarpa och Eucalyptushybrider) för att observera och korrelera med förhydrolysprocessen. READ MORE