Refining gentleness – a key to bulky CTMP
Source abstract
Abstract
Abstract Chemithermomechanical pulp (CTMP) is often used in middle layers of multiply paperboards due to its high bulk at specified strength. Such a CTMP should consist of well-separated undamaged fibres with sufficient bonding capacity. The basic objective of this work is to examine the effect of refining on bulk, taking into account conditions such as temperature, sulphonation, refining gap and refiner size. First stage CTMP made from Norway spruce (Picea abies) were produced in pilot and mill scale trials. Two new parameters,Equivalent temperature related to softnessandRefining gentlenessare introduced that take into account refining conditions as actual temperature, softening temperature, bound sulphonate content, refining gap and refiner diameter. The results show that bulk increases linearly with refining gentleness.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Cellulose Research Studies · Material Properties and Processing · Lignin and Wood Chemistry
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemical Engineering , Mid Sweden University, FSCN , Sundsvall , Sweden
BillerudKorsnäs AB , Gävle , Sweden
BillerudKorsnäs AB , Frövi , Sweden
Valmet AB, Refiner Segments , Vretenvägen 11 , Solna , Sweden
Funding
Knowledge Foundation
References (28)
Show source-provided references
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