What is Refining? Refining is a physical treatment performed on pulp fibers to improve their papermaking characteristics , Separate Paper Machines Pressure screens or cleaners can be used to separate a heterogeneous stock into streams suitable for production of different grades of paper; The paper is made on different paper machines ,..
Key Questions The following key questions are answered in this module: What is the purpose of paper and board machine refining? The main purpose of most paper and board machine refining is to improve certain sheet properties, including strength and density-related properti..
The objective of this study was to investigate the effect of refining on paper formation As it was indicated PFI refining didn't imposed a considerable shortening effect on fibers and therefore parameters indicating formation (Specific Formation and formation Value) didn't reveal an increasing or decreasing trend..
The Paper Making Process, Part 6: Equipment and Machinery
The Paper Making Process, Part 6: Equipment and Machinery Posted in SME By Mixph On January 11, 2014 Equipment and Machinery for Paper Making It is outside the scope of this brief to look in any detail at the enormous variety of equipment and machinery that has been developed for assisting in the paper making process ,..
Dewatering (Too Slow, Too Fast) The most common problems related to dewatering involve slow or variable drainage and response to vacuum Slow dewatering may involve "slow initial drainage" on the forming table, low solids after vacuum application, low solids after wet-pressing, or just a consequent lower operating speed of the paper machine..
This week as we continue on in our paper making process series, we will be discussing the refining process of the pulp In case you missed it before, the previous blogs are First Steps of Papermaking, Debarking, and Pulping Process..
This machine produces a continuous roll of paper rather than individual sheets These machines are large Some produce paper 150 meters in length and 10 meters wide They can produce paper at a rate of 100 km/h In 1844, Canadian Charles Fenerty and German FG Keller had invented the machine and associated process to make use of wood pulp in papermaking,..
This is where the cellulose fibers pass through a refining process which is vital in the art of papermaking Before refining, the fibers are stiff, inflexible and form few bonds The stock is pumped through a conicle machine which consists of a series of revolving discs..