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Introduction To The Principle Of Mechanical Pulping

Release time:

Nov 06,2018

Mechanical pulping is a method in which fiber raw materials (mainly wood) are made into pulp by mechanical grinding alone. The products are collectively referred to as mechanical pulp.

Mechanical pulping mainly utilizes the mechanical frictional friction work to face the frictional tearing action of the fiber raw material, and the heat generated by the friction to heat and soften the raw material intercellular layer lignin, and the raw material is ground and teared into Single fiber. Mechanical pulping hardly dissolves the lignin in the raw material, so the pulping yield is very high, generally about 95%, and it does not consume chemicals, so it is a pulping method with the lowest production cost. However, due to the damage caused by the friction and tear of the fibers in the production process, the physical strength of the mechanical pulp is lower than that of other pulps, and a large amount of lignin is retained in the pulp, so it is difficult to bleach and easily yellow and light under the action of light and heat. brittle.

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