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Why is the pulp and paper process important?
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Pulp is a fibrous lignocellulosic material prepared by chemically, semi-chemically or mechanically producing cellulosic fibers from wood, fiber crops, waste paper, or rags. Mixed with water and other chemicals or plant-based additives, pulp is the major raw material used in papermaking and the industrial production of other paper products. [1][2]
Papermaking - Pulping, Refining, Bleaching: Mechanical or groundwood pulp is made by subjecting wood to an abrading action, either by pressing the wood against a revolving grinding stone or by passing chips through a mill.
- Our pulp and paper process. Paper for recycling is mixed with processed water and then stirred in a giant stainless steel vat, called a pulper, to make a fibre suspension.
- Diluting paper fibres. Our paper machines remove water from the fibre solution. At the start of the papermaking process, the solution comprises of roughly 1% fibre and 99% water.
- Wire section. At the wet end of the paper machine sits the headbox, which distributes a uniform jet of watery stock. The liquid falls onto the wire or forming fabric.
- Press section. The next stage of water removal consists of passing the paper web through a series of nip rollers that squeeze the water out of the pulp mat.
The pulping process is aimed at removing lignin without loosing fiber strength, thereby freeing the fibers and removing impurities that cause discoloration and possible future disintegration of the paper. Also Read: Safeguarding the Pulp and Paper Industry: Key Safety Practices.
The paper making industry process is a multifaceted journey that starts with the sustainable harvesting of raw materials, mainly softwood and hardwood trees. These logs undergo pulping, either mechanically or chemically, to break down into fibers.
This diagram details the papermaking process and illustrates the extensive use of recovered paper. New pulp, however, is an integral part of the papermaking process: recovered paper cannot be recycled indefinitely because the fibres lose their papermaking qualities.
Oct 28, 2022 · Pulp is prepared for papermaking machines either mechanically or chemically. The mechanical method (generally used to make lower-grades of paper) is called the groundwood process , because the pulp was originally made by using huge stones to grind up logs.
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