Method of making mechanical and chemi-mechanical papermaking pulp [Framställning av mekanisk och kemimekanisk massa i två steg]

• The invention relates to a method of manufacturing mechanical and chemi-mechanical papermaking pulp with low energy input by disintegrating and beating wood material in at least two steps. According to the invention, the material is coarse-disintegrated in a first step at a concentration exceeding 20 %, acid groups in the wood material are neutralized, the material is diluted to a concentration of 1-10 % and beaten in one or several steps.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)

Nyckelord

mechanical pulping

chemimechanical pulping

low consistency refining

high consistency refining

Publikations- och innehållstyp

pop (ämneskategori)

pat (ämneskategori)