Production technology of recycled kraft paper

Recycled kraft paper refers to the use of waste paper as raw materials for recycling processing, made of a paper material similar to kraft paper. The production process of recycled kraft paper mainly includes the following steps: recycling and collecting waste paper, waste pulp, pulp preparation, paper molding and paper processing.

First of all, the collection of waste paper is the first step in the production of recycled kraft paper. Waste paper can be collected by recycling stations, waste paper acquisition stations, etc. When recycling waste paper, the paper needs to be sorted and cleaned to remove impurities and pollutants.

Next, the recycled waste paper is pulped, which is the process of humidifying, crushing, and dispersing the waste paper to make it into pulp. Slurry can be made by physical methods (such as cutting, grinding, etc.) and chemical methods (such as acid-base treatment, etc.).

Then, the pulped pulp is prepared. When preparing pulp, it is necessary to remove impurities and screen the pulp to remove impurities in the pulp and improve the quality of the pulp, at the same time, certain chemicals can be added according to the need, such as bleach, softener, etc., to improve the performance of the paper. Next comes the paper forming process. The prepared pulp is injected into the molding machine and formed by mold and mesh. When forming, the pulp is filtered and drained on the mesh, and the moisture in the pulp is gradually reduced by pressing and pressing rollers, and the density of the fibers in the paper is gradually increased.

Finally, the formed paper will be dried, calender, cutting and other processing. Drying is through hot air or infrared and other methods, so that the water in the paper evaporates, further improve the dryness of the paper, pr essure light through mechanical equipment, apply a certain pressure to the surface of the paper, so that the surface is smooth and clean, cutting is to cut the paper according to a certain size and shape to meet the requirements of use.

The production process of recycled kraft paper mainly relies on the recovery and reuse of waste paper, which not only saves resources, reduces environmental pollution, but also reduces production costs. At the same time, the quality of recycled kraft paper has also been greatly improved to meet the needs of different fields. Therefore, recycled kraft paper has been widely used in modern industrial production.