Manufacture and use of a composite structure containing precipitated carbonate

摘要

A precipitated carbonate polysaccharide structure which, when used as a filler, improves the structural strength of paper or board, or gypsum boards, plastics or gums, among others, as well as the stiffness level and optical properties (brightness and opacity) of the paper or board, together or separately with other fillers; carbonates, in particular. The invention further improves the setting of printing ink on the surface of the paper or board. The invention also includes the manufacturing method of the precipitated carbonate polysaccharide structure.

主权项

1. A method of producing a composite structure, which is formed of starch, on which carbonate is precipitated, consisting of:
forming a carbonate ion solution; mixing starch, in a form having free hydroxyl groups on its surface, into the carbonate ion solution, whereby a carbonate starch slurry is formed; and precipitating carbonate salt from the slurry into the starch.