Papermaking Technology Paper Paper Flow Shallow Solution

Fiber is the most basic material that constitutes a common paper. At the same time, this fiber must be a vegetable fiber. Some use animal fibers such as wool and silk to make thin sheets. Although they have all kinds of paper functions and characteristics, they cannot be called "paper." The use of chemical polymer fibers to make paper sheets can only be called synthetic paper. . Another important requirement for papermaking is pulping and pulping. Using a mixing knife and large horsepower machinery, the plant fibers are bifurcated and broken, and then copied into papers with greater binding strength. Unlike smooth silky fibers, it is easy to slip; after the beating Debris and pastes produced during the papermaking process have the function of plugging pores and binding paper.

In ancient times or modern handsheets, bamboo was used to screen the floating fibers in the pulp in the pulp. Because the screening action had front and rear short sides and left and right long sides, the handsheets were very uniform in all directions. The arrangement did not produce the silk flow problem described in this article. In addition, the modern anhydrous dry-type papermaking method uses air to disperse and manufacture paper by gluing. The fibers are also arranged in a free-form arrangement, and there is no wire flow direction. Wet mechanical paper, regardless of the old round net machine, single net machine, double net machine, can use very thin about 1% pulp, after the head box flow cloth in the paper surface, the dip net present horizontal or ramp-up movement, will Make the fiber appear straight along the direction of the papermaking net. The principle is as if the river flows rapidly. If there are no other disturbances, the driftwood will naturally follow the flow direction, and it will flow less diagonally or laterally to reduce the resistance. The thin pulp fibers on the paper web have a one-way effect due to the advancement of the web before the water is lost, and most of the fibers are aligned in a parallel flow direction, thus forming the reason for the future “mesh flow” of mechanical papermaking.

The paper flow has a great influence on the “sex” and “shape” of the paper, such as tear resistance, curl, elongation, shrinkage, and processing origami, book stiffness and turnability, etc. There are absolute influences, such as the parallel height of the trademark paper stream, in order to make the automatic packaging machine work smoothly. However, the importance of paper stream is seldom emphasized, and it is not a good thing for a print project.