How paper is made?
This simple material can be made by any fibrous material. China invented process in the second century A.D. the process is still the same with some improvements and refinements. Modern papermaking is quite fascinating.
Papermaking invests over $100,000 in equipment, which stand as one of the most capital-intensive industries in the country. The largest papermaking machine which can produce 1000 miles of paper a day is over 32 feet wide and 550 feet long.
Process of modern papermaking:
Trees are the basic need of this production. For this purpose trees are specially harvested like a crop. Every year millions of seeds are planted to meet the future demand.
Debarking, chipping or recycling:
To initiate the process, debarker is used to pass the logs and remove the bark. Now, come chippers, spinning blades of these cut the wood into 1” pieces. With the help of digester, wood chips are pressure cooked with a mixture of chemicals and water.
In the countable source of paper fibre, used paper is also included. To indulge the demand of the present era, many communities held recycling programs. On an approximate 40% of used paper is being recycled. Also in this process, paper is shredded and stirred with water.
Preparation of pulp:
Now, this time is to wash, refine, clean and if needed bleach the pulp. In beater, the pulp is turned to slush. Coating, color dying and addition are done here. After it, in a moving wire screen pulp slush is pumped. Computerized sensor and other equipment monitor the each stage of the process.
Formation of paper:
Paper formation starts with the draining and recycling of the pulp slush. Slushy pulp drained away, as it moved down the screen. The resulting crude paper sheet is being squeezed between large rolls. This long process takes away most of the remaining water assure smoothness, softness and required thickness. Other than this process, the semi dry crude paper is passed through heated dryer rolls.
Used paper is completely cleaned and filtered out before its releases. Chemicals and fibre particles are purified and burned to reuse.
Now, there is a need for large rolls to wound the finished paper. Particularly, 30 feet wide and 25 tons of rolls are needed to put an end to the process. Cuts the paper into smaller one and here is your paper ready for use.
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