Process and compositions for enzymatic desizing and bleaching of textiles
First Claim
1. IN THE PROCESS OF BLEACHING STARCH-SIZED TEXTILE FABRIC WITH AQUEOUS SODIUM CHLORITE LIQUOR, THE IMPROVEMENT WHICH COMPRISES SUPPLYING THE CHLORITE LIQUOR IN NEUTRAL CONDITION AND CONTAINING A CONCENTRATION OF AMYLASE DESIZING AGENT SUFFICIENT TO EFFECTIVELY DESIZE THE FABRIC IN A PERIOD OF FROM 10 TO 60 MINUTES, THE LIQUOR ALSO CONTAINING A COMPOUND THAT LIBERATES ACID UPON BEING HEATED TO AT LEAST 60*C., THE ACID-LIBERATING COMPOUND BEING IN A CONCENTRATION SUFFICIENT TO CAUSE THE LIQUOR WITH THE LIBERATED ACID TO EFFECTIVELY BLEACH THE FABRIC, AND FIRST CONTACTING THE FABRIC WITH THE LIQUOR AT A TEMPERATURE BETWEEN 20* AND 60*C. FOR BETWEEN 10 AND 60 MINUTES TO EFFECT DESIZING, AND THEN RAISING THE TEMPERATURE OF TREATMENT TO ABOVE 60*C. TO EFFECT BLEACHING.
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Accused Products
15 Citations
1 Claim
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1. IN THE PROCESS OF BLEACHING STARCH-SIZED TEXTILE FABRIC WITH AQUEOUS SODIUM CHLORITE LIQUOR, THE IMPROVEMENT WHICH COMPRISES SUPPLYING THE CHLORITE LIQUOR IN NEUTRAL CONDITION AND CONTAINING A CONCENTRATION OF AMYLASE DESIZING AGENT SUFFICIENT TO EFFECTIVELY DESIZE THE FABRIC IN A PERIOD OF FROM 10 TO 60 MINUTES, THE LIQUOR ALSO CONTAINING A COMPOUND THAT LIBERATES ACID UPON BEING HEATED TO AT LEAST 60*C., THE ACID-LIBERATING COMPOUND BEING IN A CONCENTRATION SUFFICIENT TO CAUSE THE LIQUOR WITH THE LIBERATED ACID TO EFFECTIVELY BLEACH THE FABRIC, AND FIRST CONTACTING THE FABRIC WITH THE LIQUOR AT A TEMPERATURE BETWEEN 20* AND 60*C. FOR BETWEEN 10 AND 60 MINUTES TO EFFECT DESIZING, AND THEN RAISING THE TEMPERATURE OF TREATMENT TO ABOVE 60*C. TO EFFECT BLEACHING.
Specification