FSC double gray cardboard
paper production process of general printing paper production is divided into two basic processes, pulp and paper pulp is to use mechanical method, chemical method or combination of both dissociation into unbleached pulp or plant fiber raw material pulp bleaching.
Papermaking is suspended in the water of the pulp fibers, after various processing combined into accord with various requirements of sheet.
Mill is usually need to store enough with 4 ~ 6 months of the raw material, through natural fermentation in the raw material in storage, for pulping, at the same time to ensure continuous production of paper factory.
The preparation section of the reed, wheat straw and wood raw materials such as cutting ChengLiao (
For the production of chemical pulp)
Or cut wood
For production of groundwood)
And then add in the small piece of material into the digester chemical liquid, steam cooking, cook the raw materials into pulp, or to terminate the wood to grind wood on the ground to a pulp, can be via a certain degree of cooking and then ground to a pulp.
And with plenty of water for pulp washing, and through the screening and purification of the pulp thick slices, she, stones and sand to remove.
Again according to the requirement of the paper kind, the required the whiteness of pulp floated with bleach, then use the beating beating equipment.
And then add to improve the performance of paper pulp packing, plastic materials, sizing agent and other supplementary materials, purification and selection and once again, the last on paper machine through a network filter water, squeeze dryer dehydration, drying, pressure light winding, and the cutting and rewinding of or cutting to produce web and tablet of paper.
If the production to produce coated printing paper, you may need to dry or after production of paper rolls in central implementation by coating processing.
In addition to the above basic process, also including some auxiliary process, such as cooking liquor preparation, preparation of bleaching solution, stewing and steaming of the rubber chemicals and heat recycling of waste liquid and waste gas, etc
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