Back to results
US 5,846,266 AGranted
Fabric printing
OwnerIan Durham Ratteeinventor
Life of this patent
Estimating the term…
Abstract
By using printing pastes containing thiourea dioxide together with finely dispersed calcium, magnesium or zinc hydroxide, present in the paste as such or generated from components in the printing paste during a treatment process, fabric discharge printing processes may be developed which have the advantage of decorating fabric webs, garments or garment panels effectively, even in dry heat conditions, whilst avoiding contamination of such fabrics with undesirable residues, particularly formaldehyde.
Claims15
A process of decorating a cellulose fabric of an original dye color by discharge printing to form a design on the fabric comprising 1) the steps of:
- applying a paste in the design to the fabric, said paste comprising a reagent of at least one of thiourea dioxide or formamidine sulfinic acid 2) an amine and 3) calcium, magnesium or zinc hydroxides or water soluble metal salts or oxides of calcium, magnesium or zinc which, under the conditions of the treatment process, will react with ammonia or an amine to form finely dispersed hydroxides of the said metals;
- and
- dry heating the fabric with said paste thereon to react the constituents of the paste and discharge the original dye color.
Dependencies are inferred from the claim text.