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US 3,955,226 AGranted
Process for heat fixation of dyestuffs using polyester material as filter for circulating air stream
AssigneeHoechst Aktiengesellschaft
InventorsErich Feess, Gunther Trapp, Heinz Fleissner
Life of this patent
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Abstract
Process for the heat fixation of dyestuffs on textile flat articles using a steamer with directional air or vapor stream wherein the circulating air or vapor stream is purified from dyestuff particles by intercalating a filter.
Claims2
A process for the heat fixation of dyestuffs on textile articles comprising the steps of:
- passing a directional hot air of vapor flow through dyed or printed textile articles in a heat fixation zone;
- passing the said air or vapor flow coming from said fixation zone through a filter consisting of polyester material, in order to remove dyestuff particles from said air or vapor flow by absorption on said polyester material;
- and recirculating said air or vapor, from which the dyestuff particles have been removed, through said textile articles in said fixation zone.
In a process for the heat fixation of dyestuffs on textile articles wherein a directional air or vapor stream is passed through said textile articles in a heat fixation zone, the improvement consisting of:
- passing the air or vapor coming from said heat fixation zone through a filter consisting of polyester material, in order to remove particles of dyestuff from said air or vapor by absorption on said polyester material;
- and recirculating said air or vapor, from which dyestuff particles have been removed, through said textile articles in said fixation zone.
Dependencies are inferred from the claim text.