A kind of cardboard production process and dryer

Abstract

The invention discloses a cardboard production process and a dryer, and relates to the technical field of cardboard production. The cardboard production process includes: S1, subjecting starch to the first gelatinization treatment to produce gelatinized starch slurry, and drying the gelatinized starch slurry to produce mature starch; S2, subjecting the mature starch in S1 to the second Secondary gelatinization treatment, making gelatinized matured starch slurry, and simultaneously preheating multiple base papers for the first time; S3, coating the gelatinized matured starch slurry in S2 between multiple base papers in S2; S4: Send the base paper coated with the gelatinized mature starch slurry in S3 to a dryer, and heat and set it. Also disclosed is a dryer, which adopts the above process. This process can reduce the gelatinization temperature of the starch slurry and increase the viscosity, saving energy, and at the same time, the dryer can improve the physical index of the cardboard surface.

Description

technical field [0001] The invention relates to the technical field of cardboard production, in particular to a cardboard production process and a dryer. Background technique [0002] Cardboard is a thick paper sheet made of various pulps and interwoven fibers. The uses of cardboard mainly include cardboard for packaging, cardboard for industrial technology, cardboard for construction, and cardboard for printing and decoration. With the continuous increase of logistics volume, the market demand for cardboard is also increasing. Therefore, how to improve the production efficiency of cardboard and reduce production costs and energy consumption has become an important issue in the field of cardboard production technology. Using starch gelatinization as a binder in the paperboard manufacturing process is a common method in the prior art. Specifically, starch is insoluble in water at room temperature, but when the water temperature reaches above 53°C, the physical properties of s...

AI Technical Summary

Problems solved by technology

[0004] 1) The gelatinization temperature of the starch slurry coated on the base paper is relatively high, usually 60°C. At the same time, the gelatinized starch slurry has a low viscosity and poor effect, which makes it difficult to guarantee the physical indicators of the cardboard;

[0005] 2) Due to the low viscosity of the gelatinized starch slurry, the temperature of the upper and lower heating plates needs to be above 200°C in order to effectively dry the gelatinized starch slurry coated between the base paper and the base paper, and at the same time make the phase The adhesion between two adjacent sheets of base paper meets the requirements of use, which greatly wastes energy and is not conducive to energy saving and emission reduction; at the same time, the high temperature of the upper and lower heating plates will cause deterioration of the physical indicators of the cardboard surface, making it difficult to ensure the quality of the cardboard. product quality

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