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Application filed by Vissh Khim T IfiledCriticalVissh Khim T I
Priority to BG9169090ApriorityCriticalpatent/BG50346A1/en
Publication of BG50346A1publicationCriticalpatent/BG50346A1/en
The composition applies to the production of writing, printing and packing paper. The papers produced have good mechanical strength with higher filling agent retention, better sizing degree with a comparatively higher pH system and are more stable when ageing. The paper composition is the following: bleached and unbleached cellulose pulp, woody pulp and secondary fibrous materials; rosin glue 0.25 to 3.0 percent of the absolutely dry fibrous material; filling agent from 5 to 25 percent of the absolutely dry fibrous material; aluminium hydroxide paste and aluminium sulphate in ratio from 1:1 to 3:1, and the pH system is from 5.0 to 5.5.
Process for loading cellulose fibers with calcium carbonate, paper pulp loaded with calcium carbonate, loaded paper and process for the production of a loaded paper from cellulosic fibers
Process for the bleaching and delignification of chemical paper pulps and application of this process to the bleaching and delignification of kraft pulps and of asam pulps