Kraft paper machine, corrugated paper machine, cultural paper machine. Special paper machine

The process of producing kraft paper from waste paper involves several steps. Here is a brief description of the process:

1. Collection and Sorting: Waste paper is collected from various sources such as households, offices, and industries. It is then sorted based on its quality and type. The sorting process helps in separating different types of paper and removing contaminants.

2. Pulping: The sorted waste paper is then mixed with water and chemicals in a large pulper. The pulper breaks down the paper fibers and separates them from ink and other impurities. This process, known as pulping, converts the waste paper into a pulp mixture.

3. Cleaning and Screening: The pulp mixture is passed through screens and cleaners to remove any remaining impurities such as staples, plastics, and adhesives. This ensures that the pulp is clean and free from contaminants.

4. Bleaching (optional): Depending on the desired quality and color of the kraft paper, the pulp may undergo a bleaching process. Bleaching agents are added to the pulp to remove any residual color and achieve a brighter appearance.

5. Papermaking: The cleaned and refined pulp is then fed into a paper machine. The machine consists of a wire mesh conveyor belt that moves continuously, allowing the pulp to spread evenly and form a thin layer. As the water is drained, the fibers begin to bond together, forming a sheet of wet paper.

6. Drying and Pressing: The wet paper sheet is passed through a series of heated rollers and drying cylinders to remove excess moisture. Pressure is applied to compress the paper and improve its strength and smoothness.

7. Finishing: Once the paper is dry, it goes through a series of finishing processes. This may include calendering, where the paper is passed through smooth rollers to enhance its surface finish, and cutting into desired sizes.

8. Packaging and Distribution: The finished kraft paper rolls or sheets are packaged and prepared for distribution. They are typically used for various applications such as packaging materials, envelopes, bags, and other paper products.

Overall, the process of producing kraft paper from waste paper involves collecting, sorting, pulping, cleaning, screening, bleaching (optional), papermaking, drying, pressing, finishing, and packaging.