Titanium dioxide adding method in plain shade decorating base paper production

Abstract

The invention relates to a titanium dioxide adding method in a plain color decoration raw paper production, belonging to the method in the paper making production. The invention is characterized in that the titanium dioxide is put into the sizing agent of the pulper and is untwined with the sizing agent; after getting out of the pulper along with the sizing agent, the titanium dioxide gets into the pulping machine to carry on the refining; after getting out of the pulping machine along with the sizing agent, the titanium dioxide gets into the mixture making well to carry on the mixture making. The invention has the advantages that: the titanium dioxide which passes the untwining process of the pulper and the refining process of the pulping machine, receives the high intensity machinery dispersion; the following producing and coping paper basically has no lemon spot; the covering ability is strong; the invention improves the product quality of the plain color decoration raw paper greatly, obviously enhances the remain rate of the titanium dioxide in the coping paper production process, is easy to operate, solves the long-term difficult technical problem puzzling the plain color decoration raw paper production enterprises and gains the unexpected effect.

Description

technical field [0001] The invention provides a method in papermaking production, especially a method for adding titanium dioxide. Background technique [0002] In the production process of plain decorative base paper, in order to improve its covering ability, it is necessary to add titanium dioxide with high whiteness and high refractive index to the slurry. The existing adding method is to directly add titanium dioxide to the slurry in the batching well, and mix it with the slurry and other pigments. Although the particle size of the added titanium dioxide is relatively fine (generally 0.2-0.4μm), the addition of titanium dioxide by this method, due to its poor dispersion in the slurry, will cause subsequent production of the finished paper. , still showing large and small white spots, which has become a major problem affecting the quality of plain decorative base paper products. In order to improve the dispersion effect of titanium dioxide, some people add a certain pro...

AI Technical Summary

Problems solved by technology

Although the particle size of the added titanium dioxide is relatively fine (generally 0.2-0.4μm), the addition of titanium dioxide by this method, due to its poor dispersion in the slurry, will cause subsequent production of the finished paper. , still showing large and small white spots, which has become a major problem affecting the quality of plain decorative base paper products

In order to improve the dispersion effect of titanium dioxide, some people add a certain proportion of dispersant to titanium dioxide, but the effect is still unsatisfactory, and the production cost is increased.