Groundwood pulp produced by mechanically grinding logs or chips, including bark, as opposed to breaking them down chemically. See also: Groundwood Paper. to top
Pulp produced by mechanically separating the wood fibres from one another. The pulp is produced from debarked wood which is either applied to a grindstone (SGW, stone groundwood pulp), or cut into chips and ground in refiners (TMP, thermo mechanical pulp, or PGW, pressure groundwood).
Wood pulp made entirely by mechanical means (i.e., by shredding logs on a grinder to separate the fibers). Mechanical pulp retains the sap, sulfur compounds, and sugar from the tree, in addition to the lignin, which binds the fibers together. Lignin reacts with violet light. Consequently, papers made from mechanical pulp tend to turn yellow with long exposed to light. Newsprint and some packaging boards are manufactured from mechanical pulp. Pulp produced in this manner is termed groundwood pulp. Mechanical pulping is cost effective, but highly energy-intensive. Mechanical pulp can also be made by feeding chips to refiners where they are defibrated between two circular blades. This gives either refiner mechanical pulp or thermomechanical pulp. The difference is that in producing the latter, the refiner is heated to temperatures up to 250 degrees F under pressure. The pulp is then screened, thickened, and blended with a chemical pulp, either sulfite or sulfate. See also CHEMICAL PULP LIGNIN NEWSPRINT PAPER PULP
pulp prepared through mechanical rather than chemical methods, see groundwood pulp
Same as groundwood pulp. Pulp produced by grinding logs and wood chips into pulp.
Pulp made by the grinding of steamed or boiled groundwood (without the addition of chemical agents).
Pulp produced using a non-chemical process and instead using a grinding process. Papers made from mechanical pulp often have good opacity and bulk but yellow more quickly than paper produced from chemically made pulp. Newspapers are often printed on papers having a proportion of mechanical pulp.
Pulp, which has been prepared from wood primarily by mechanical, rather than chemical, means of separating fibers or fiber agglomerates from each other.
See "groundwood"; also see "semi-chemical", "thermo-mechanical", and "refiner mechanical pulp" (RMP).
Pulp consisting of fibres separated entirely by mechanical means
Paper making pulp made entirely by mechanical means from various raw materials i.e. by grinding wood against an abrasive surface (ground wood pulp) or by processing wood chips or sawdust through a refiner (refiner mechanical pulp). Mechanical pulp contains considerable part of non-cellulosic compounds
Lignin-containing pulp produced from mechanically grinding logs or wood chips in refiners and pulverizers. It is used mainly for the production of newsprint and other paper.
A generic term describing pulps produced by a mechanical (as opposed to a chemical) process. Also known as "high-yield" pulp as the processes utilize a higher proportion of the wood raw material than do the chemical processes. The mechanical processes include groundwood, refiner mechanical, thermo mechanical and chemi-thermomechanical. Mechanical pulps are used principally in the production of newsprint and in publication grades of printing and writing paper.
Pulp produced by mechanically grinding usually logs or wood chips; used mainly for newsprint and as an ingredient of base stock for lower grade printing papers.
Groundwood pulp made by grinding trees into fibres without removing lignin.
A generic term describing pulp produced by a mechanical (as opposed to a chemical) process. Also known as "high-yield" pulp as the processes utilize a higher proportion of the wood raw material than the chemical processes. Mechanical pulp is produced using either grinders or refiners. They are principally used in the production of newsprint, magazine papers, printing papers, specialty papers, tissue, towelling, paperboard, and wallboard.
Wood pulp manufactured wholly, or in part, by a mechanical process.
Pulp produced by mechanical treatment of wood in grinders or refiners.
Pulp produced by means of the mechanical grinding or refining of wood or wood chips.
