Main Factors Affecting the Flatness of Corrugated Board - Corrugated Board Production Line

2021-10-27

Main reasons affecting the flatness of cardboard

1. The types and grades of liner paper are different. There are imported and domestic kraft paper, imitation kraft paper, corrugated paper, tea board paper, high-strength corrugated paper, etc. They are divided into A, C, B, E. Generally, the quality of the paper is better than that of the liner paper.

2. The main technical parameters of liner paper are different. Considering the performance requirements of the carton or the cost reduction for users, the surface liner paper of the carton has different requirements, usually:

(1) The quantity of surface liner paper is different. Some organizations are larger than the liner paper, while others are smaller.

(2) The moisture content of the facial tissue liner paper is different. Due to different humidity from suppliers, transportation, inventory, and other environments, the moisture content of facial tissue is higher than that of liner paper, but also lower.

(3) The surface liner paper and moisture content are different. First, the basis weight of thin paper is greater than that of liner paper, and the moisture content is greater than or less than that of liner paper; secondly, the basis weight of thin paper is less than that of liner paper, and the moisture content is greater than or less than that of liner paper.

3. The moisture content of the same batch of paper is different. One part of the paper has a higher moisture content than another part or the moisture content of the tube paper.

4. The selection and adjustment of the heating surface length (package angle) of the paper page preheater is improper and cannot be adjusted arbitrarily. Improper operation of the former and limited equipment of the latter affect the preheating and drying effect.

5. The steam spray device cannot be used correctly or there is no spray device on the equipment, so the moisture of the paper cannot be increased arbitrarily.

6. The time for the paper to release moisture after preheating is insufficient, or the environmental humidity is high, ventilation is poor, and the production line speed is inappropriate. 7. The amount of glue applied by the single-sided corrugating machine and the gluing machine is inappropriate and uneven, leading to uneven shrinkage of the imported cardboard.

8. Insufficient and unstable steam pressure, damaged accessories such as the dehydrator, or delayed drainage of pipeline water, resulting in the preheater unable to work normally and stably.