PROCESS FOR PREPARING A MIXED DYE COMPOSITION FOR BRIGHTENING AND WHITENING CELLULOSE MATERIAL AND AN ABSORBENT PRODUCT

摘要

A mixed dye composition for brightening and whitening cellulose material comprises a first dye having an absorption band from 4800 ANGSTROM to 6000 ANGSTROM and a second dye having an absorption band from 4900 ANGSTROM to 6300 ANGSTROM in a weight ratio of from 10:1 to 1:10. The first dye is the colour index acid violet dye 47 which is an anthraquinone type dye, while the second dye is the colour index acid violet dye 49 which is a triphenylmethane type dye. The cellulosic material is used as an absorbent mass in disposable articles used for capturing body fluids (e.g. diapers, sanitary napkins, and incontinence pads which are generally structured with a top sheet or sheets, a body of absorbent material thereunder and a back sheet to restrain loss or escape of the fluids from the article).