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ECO friendly Kraft tape base paper beating process!

Article provenance:未知 Popularity:Time:2020-10-10 21:26
It is not necessary to share the pulp and kraft pulp directly after the pulp is washed and boiled.

If you use it to make paper, the result is that the paper is soft, rough surface and poor strength, which can not meet the general requirements for paper.

So beating is a very important link in papermaking, especially in the production of high-quality paper, beating is more important. Generally speaking, in addition to mechanical pulp, other types of oars have to go through different degrees of beating treatment.

The purpose of beating is to give certain properties to the paper industry by mechanical action and fluid shear action, so that the produced paper and core can have the expected quality.
 
In order to explain the function of beating clearly, we must start with the microstructure of plant fiber. As far as plant fiber is concerned, the single fiber that people can see is small enough. However, under the ordinary light microscope and electron microscope, it can be seen that a single fiber is composed of several fine fibers, and a phase fine fiber is composed of a number of microfibrils. The finer the fiber is, the more flexible it is. When the paper is made on the web of the paper machine, the better the fiber interweaves.
 
According to people's common sense of life, a glass rod will break when it is touched. If the appropriate diameter is not fine enough, it will break when it is touched. Only when the diameter is less than 0.75 μ m (1 μ M = 1 / 1000 mm), can it be as soft as cotton, and it will not be broken easily.
 
Beating has several effects on fiber, such as cutting short, moistening, dissolving and splitting. It is easy for us to understand this point about cutting short fibers, so there is no need to explain it. Some of the fibers themselves are very long. For example, jute fiber is generally 1.5-5.0 mm long, and cotton linter fiber length is 10-40 mm. When this kind of long fiber pulp is used, the paper uniformity is not good, and the strength is also poor. Therefore, it is necessary to cut the fiber properly when beating.
 
It is also known in our daily life that it is not easy to separate a bunch of dry fans. If it is not done well, the fans will be broken off. Only put the dry silk into the water to soak for a period of time, after the dried vermicelli have been bloated, stir a little, and the vermicelli will be separated automatically.
 
The same is true of beating. Beating pulp fiber into a single fiber and single fiber further divided into fine fiber, or even into micro fiber, pulp fiber must first get full swelling. This is the reason why wet pulp is easier to beat than dry pulp.
 
The swelling fiber is easy to be dispersed into single fiber and make fine fiber or micro fiber by beating equipment. These effects of beating oars, the former is called relaxation, the latter calls it filiform (scientific name fine fibrosis, commonly known as broom).
 
What needs to be pointed out here is that the common so-called brooming refers to the phenomenon that the micro fibers at the end (one end or both ends) of the fiber are knocked out and fluffed. However, when there are micro stitched fibers on the main body of the fiber to be opened for fuzzing, it certainly can't be called "brooming", but it still belongs to the function of filamentation. In production practice, it is often encountered that there is little or no "brooming" phenomenon in the production, and the paper strength is also very good, which is the reason.
 
In addition, the swelling and splitting of fibers complement and promote each other. The swelling of fibers is beneficial to the separation of fibers, and the separation of fibers also contributes to the further swelling of fibers.
 
In addition to the above effects on fibers, beating sometimes involves the functions of pulp, gum, filler, pigment and various auxiliaries.

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