Drying equipment and drying process applied to thermal dye sublimation body paper

Abstract

The invention discloses drying equipment and a drying process applied to thermal dye sublimation body paper. The drying equipment sequentially comprises a primary pre-drying unit, a primary drying unit, a surface gluing unit, a secondary pre-drying unit and a secondary drying unit along the advancing method of paper, the primary pre-drying unit comprises a big dryer and a plurality of supporting rollers arranged on the outer side of the big dryer, the primary drying unit comprises a plurality of first small dryers, the secondary pre-drying unit comprises a drying box, and the secondary drying unit comprises a plurality of second small dryers and a cooler which are arranged sequentially along the advancing direction of the paper. Primary pre-drying and secondary pre-drying are added before primary drying and secondary drying respectively, and the big dryer is adopted for primary pre-drying, so that through strong drying of the big dryer, expanding and contracting ratio of the paper is lowered effectively, and influence on smoothness of the paper due to scrapings caused by the fact that undried glue is bonded to a drying net and the dryers is avoided.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a drying equipment and a drying process applied to thermal sublimation base paper. Background technique [0002] In the production process of sublimation base paper, the traditional drying method is divided into primary drying and secondary drying, and both primary drying and secondary drying are dried by small drying cylinders. This method mainly has the following disadvantages: [0003] First, in order to avoid the phenomenon of lint and powder falling, so as to improve the printing quality, surface sizing is usually carried out between the first drying and the second drying, because the paper after surface sizing becomes wet, and the second drying is The paper is supported and shaped by the dry net, such as figure 2 and image 3 As shown, that is, the paper is close to the small drying cylinder, and the dry net is set on the outside of the paper, so that it directly ente...

AI Technical Summary

Problems solved by technology

[0003] First, in order to avoid the phenomenon of lint and powder falling, so as to improve the printing quality, surface sizing is usually carried out between the first drying and the second drying, because the paper after surface sizing becomes wet, and the second drying is The paper is supported and shaped by the dry net, such as figure 2 and image 3 As shown, that is, the paper is close to the small drying cylinder, and the dry net is set on the outside of the paper, so that it directly enters the secondary drying. Friction occurs, and the undried glue sticks to the dryer screen and drying cylinder to generate scraping, which affects product quality, and at the same time destroys the film-forming properties of the glue on the paper surface and affects the printing effect

[0004] Second, in the traditional drying method, a drying is carried out by several small drying cylinders, so in the drying process, the humidity of the wet paper is still relatively high after being dried by the first drying cylinder, and after entering the The pulling force on the second drying cylinder is relatively large, so that the paper is stretched, thus affecting the stretching ratio of the final finished paper

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