Sökning: "Per Engstrand"
Visar resultat 16 - 20 av 30 avhandlingar innehållade orden Per Engstrand.
16. The influence of Pulp Type and Hot-pressing Conditions on Paper Strength Development
Sammanfattning : The hot-pressing technology has proven to have the potential for manufacturing of strong, wet stable materials based on eco-friendly renewable and recyclable lignocellulose. The purpose of this work was to study how the pulp characteristics and the hot-pressing conditions affect the dry and wet strength properties of paper. LÄS MER
17. High consistency hydrogen peroxide bleaching of Norway spruce mechanical pulps
Sammanfattning : .... LÄS MER
18. Improved hydrogene peroxide bleaching of mechanical pulps through fundamental understanding of the influence of heat, iron, fines and chemical treatment on chromophore content
Sammanfattning : .... LÄS MER
19. Polyelectrolyte multilayers of cationic and anionic starch and their use for improving the strength of papers made from mechanical pulps
Sammanfattning : Graphic paper is experiencing severe competition from other materials and, most of all, from other media. This means there is a great need to improve paper quality while reducing raw material and production costs. Polyelectrolyte multilayer (PEM) treatment (i.e. LÄS MER
20. Improved energy efficiency in double disc chip refining
Sammanfattning : The electrical energy consumption in thermomechanical pulping (TMP) is very high, in the range of 2 – 3 MWh/adt depending on process solution and on the product quality specifications for the paper product. Both pulpwood and energy prices have increased rapidly for some time. LÄS MER