German patent Ger. Offen DE102.007.030. 102 (2009.1.2-11P) describes that the decorative base paper produced by impregnation of modified starch and polymer glue (dispersion index ≥ 6) has good resistance to dissection and the reagents used do not contain formaldehyde.
Decorative base paper manufacturing method: the pulp ratio is 80% of eucalyptus pulp, 20% of pine pulp, and 5% of pulp, and the addition of wet strength agent epichlorohydrin is 1.8%. The pH is adjusted to 6.5 with Al2(SO4)3 and TiO2 is added. 30%, talcum powder 5%, retention agent 0.11%, defoamer 0.03%, paper sheet basis weight 50 g/m2. The base paper was impregnated with a solution of 80% of modified starch and 20% of butyl acrylate-styrene copolymer, and dried at a temperature of 120° C. with a moisture content of 2.5%.
The decorative paper made has high strength, good printing performance and low yellowing rate.
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