Zouping Shuntong Paper Machinery Co., Ltd.

Zouping Shuntong Paper Machinery Co., Ltd.

Specializing in the production of pulping system equipment and accessories manufacturers

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Comparison Of Laser Cutting Machine Accuracy, Speed, Effect And Stability

Comparison Of Laser Cutting Machine Accuracy, Speed, Effect And Stability

How much do you know about laser cutting machines? Do you know laser cutting machine? With the development of laser cutting technology, laser cutting is used in more and more fields, and more and more materials are applicable.

26

2022

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09

Mechanical Pulping According To The Different Classification Of Its Grinding Equipment And Pulp Quality

Mechanical Pulping According To The Different Classification Of Its Grinding Equipment And Pulp Quality

The grinding equipment is of various types of grindstone grinding machines, mainly including bag type (including Dabei type, Kaweier type, etc.), chain type (see figure) and ring type. The first two are more commonly used. The wood section can be continuously added to the material box, and the wood section is subjected to the pressure of rotating the chain downward, and is in close contact with the surface of the rotating grindstone. In the friction zone, the interfiber layer of the wood fiber is softened by friction and is softened and torn into a single sheet. The root fiber is washed by water from the surface of the grindstone to the underlying slurry pit. The properties of the surface of the grindstone have a great influence on the quality of the pulp, and can be decorated with a stone carving device. The pulp is generally made of wood such as spruce, fir, and poplar, with a whiteness of about 60%, and has good opacity and ink absorbing properties, and is generally used for production of newsprint and medium and low-grade printing paper.

06

2018

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11

Introduction To The Principle Of Mechanical Pulping

Introduction To The Principle Of Mechanical Pulping

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.

06

2018

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11

11 solutions to the problem of raising paper in the papermaking process

11 solutions to the problem of raising paper in the papermaking process

11 solutions to the problem of raising paper in the papermaking process: (1) Temperature of several dryers (check the temperature with a pyrometer) (2) There are too short fibers in the slurry (requires reduction of fine grinding, research on the possibility of changing raw materials) (3) Poor bond between fibers (increasing fine grinding and increasing the amount of wet additive) (4) Check the PH value of white water (adjust if necessary)

06

2018

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11

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