METHOD OF MAKING OF SILICATE FIBER FROM NATURAL CHRYSOTILE ASBESTOS Russian patent published in 1994 - IPC

FIELD: fibrous materials. SUBSTANCE: for making of thermostable and acid resistant microcapillary fiber the natural chrysotile asbestos is subjected for etching in concentrated solution of HCl or HNO₃, at the room temperature for 48 h (not less). Then treatment is carried out in solution of these acids at concentration 1: 20-30 for 1 h (not less) following by washing in water and drying. Method is used for production of woven and nonwoven materials. EFFECT: improved method of fiber making.