Search for dissertations about: "wet press"

Showing result 1 - 5 of 12 swedish dissertations containing the words wet press.

  2. 1. The influence of stress variations in wet pressing

    Author : Jörgen Gullbrand; KTH; []
    Keywords : press felts; roughness; smoothness; surface structure; uniformity;

    Abstract : Two methods for the measurement of micro-scale stressvariations of press felt surfaces were developed. The methodswere based on a thin plastic film that was coated with anopaque stress-sensitive layer (Cronapress conversion film). Thefilm was compressed between a felt and a smooth surface. READ MORE

  4. 2. Precalendering and its interaction with other unit processes in the manufacturing of woodfree paper and board

    Author : Olof Steffner; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; calendering; soft-nip calendering; wet press; compression; deformation; coating; water box;

    Abstract : ABSTRACTDuring calendering, which is done in order to improve its printing properties, the paper is compressed in one or more roll nips. Paper is a viscoelastic material and this will influence its performance during calendering. READ MORE

  5. 3. High strength paper from high yield pulps by means of hot-pressing

    Author : Tove Joelsson; Per Engstrand; Gunilla Pettersson; Anna Svedberg; Samuel Schabel; Mittuniversitetet; []
    Keywords : high yield pulp; hot-pressing; lignin; paper properties; wet strength;

    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

  6. 4. On the Modelling of Mechanical Dewatering in Papermaking

    Author : Vinicius Lobosco; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; paper; modelling; dewatering; forming; wet pressing; fibre network stress; rheology; hysteresis; intra-fibre water; compressibility; structural stress; stress-strain; restricted gels; swelling;

    Abstract : Most of the water fed into a paper machine is removedmechanically in the forming and press sections. One of thefactor which has an important influence on mechanicaldewatering, i.e. in both forming and pressing, is thestress-strain behaviour of the fibre network. READ MORE

  7. 5. Silicon micromachining with applications in microoptics

    Author : Carola Strandman; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Materialvetenskap; Materials science; Teknisk materialvetenskap; Elektronik; Electronics;

    Abstract : The microsystems technology (MST) is strongly evolving, constantly finding new application areas. Here, the area of microoptics is presented with examples of different solutions that MST has made possible within optical sensors, actuators, and optoelectronic systems. READ MORE