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Introduction to the principle of mechanical pulping

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Sep 26,2022

Mechanical pulping is a method of making fiber raw materials (mainly wood) into pulp by simply using mechanical grinding. The products are collectively referred to as mechanical pulp.

Mechanical pulping mainly uses the friction and tearing effect of the mechanical rotating friction face on the fiber raw material, as well as the heating, softening and plasticizing effect of the heat generated by the friction on the lignin of the raw material intercellular layer, and the raw material is ground and split into two parts. single fiber. Mechanical pulping hardly dissolves the lignin in the raw materials, so the pulping yield is very high, generally about 95%, and it does not consume chemicals, so it is the cheapest pulping method. However, due to the greater damage to the fibers by friction and tearing during the production process, the physical strength of mechanical pulp is lower than that of other pulp types, and a large amount of lignin is retained in the pulp, so it is difficult to bleach and easy to turn yellow and hair under the action of light and heat. crisp.

Introduction to the principle of mechanical pulping

Sep 26,2022

Mechanical pulping is a method of making fiber raw materials (mainly wood) into pulp by simply using mechanical grinding. The products are collectively referred to as mechanical pulp.

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