Surface Treatment Aided Effect On The Printing Performance Of Artificial Board Decorative Base Paper

Decorative base paper is a kind of special paper produced by wet papermaking technology using high quality wood pulp, titanium dioxide, functional fillers, additives as raw material, after being printed and dipped by melamine resin, composite and other optional process, decorative paper can be used for underlying balance paper, surface layer decorative paper and protective layer of artificial board such as fiberboard, flakeboard and so on. The printed decorative base paper (referred to as decorative base paper)as the substrate for the surface layer decorative paper, it is a kind of decorative paper for artificial board after printed, dipped by melamine resin and pressed on the board to improve the appearance and resistance. The quality of our decorative base paper still have a gap with the world’s advanced products and most of high-quality products rely on imports, it is mainly reflected in the printability problems such as surface strength, evenness, smoothness, color reproduction and so on. In order to compensate for these shortcoming, take the domestic decorative base paper as the base material, surface sizing was used to improve the printing performance in this study.In this paper it is mainly adopted the surface sizing and pigment sizing for decorative base paper surface treatment. Starch and styrene-acrylic emulsion (SAE) were used as the surface sizing agents for the surface treatment, through the starch solution and complex of starch and SAE(modified starch and SAE is30:1、20:1、10:1and5:1) to improving printability in the decorative base paper and get the optimal sueface sizing method. Based on surface sizing conclusion, respectively calcium carbonate, silica and titanium dioxide as the pigment in the pigment sizing liquid, changing the different ratio of the sizing liquid and pigment (i.e.90:10、80:20,70:30,60:40and50:50) as the pigment sizing liquid for the surface sizing, obtains the optimal sizing proportion. In above experiments were used goods SAE and homemade SAE, compared the difference in decorative base paper applications.Under the conditions sizing speed9m/min,sizing quality about2g/m2to the surface sizing for the decorative base paper. Using starch and SAE can improve the tensile strength, smoothness, unchange the absorbent, ink absorbency was reduced, printing reproduction in the middle and light area enhanced, when the starch and SAE ratio of20:1get the best effect; Compared homemade and goods SAE in the sizing liquid found the homemade SAE had the better performance, especially in the absorbent height; Respectively by using calcium carbonate, silicon dioxide and titanium dioxide compound with adhesive solution, after the comprehensive consideration of silica is more suitable for application in decorative base paper surface sizing; Change the proportion of adhesive solution and pigments, when the ratio of70:30obtained the better performance. Contrast the sizing liquid can be found that the adhesive solution add little pigment can improve the absorbent, color density, color reproducibility, dots loss of the decorative paper. In order to further confirm the conclusion, from the pemeability and the microscopic observation of the decorative base paper get the paper absorption properties and surface structure data, and by SEM and laser microscope observation of surface morphology, complex the visual and microscopic result obtained the suitable treatment method for decorative base paper.