The method of degumming jute fibres with complex enzyme (2)

Abstract

A method of degumming jute fibres with complex enzyme, wherein said complex enzyme comprises pectinase and laccase, comprises the steps of: a. Soaking the jute fibres in said complex enzyme water solution, wherein the weight proportion of said complex enzyme water solution and jute fibres ranges from 12:1 to 40:1; b. adjusting the PH value of said complex enzyme water solution to above 4.0, but below 5.0, and adjusting the temperature of said complex enzyme water solution to 35° C.-65° C., then keeping said complex enzyme water solution at such temperature for 20-120 minutes; c. adjusting the PH value of said complex enzyme water solution to 7.5-9.5, and adjusting the temperature of said complex enzyme water solution to 40° C.-70° C.; then, keeping said complex enzyme water solution with such temperature value for 20-120 minutes; d. conducting enzyme deactivation of the jute fibres processed with said complex enzyme.

1 . A method of degumming jute fibres with complex enzyme, wherein said complex enzyme comprises pectinase and laccase, comprising the steps of:
 a. soaking the jute fibres in a water solution of said complex enzyme made from pectinase and laccase, wherein the weight proportion of said complex enzyme water solution and jute fibres ranges from 12:1 to 40:1.   b. adjusting the pH value of said complex enzyme water solution to above 4.0, but below 5.0, and adjusting the temperature of said complex enzyme water solution to 35° C.-65° C., then keeping said complex enzyme water solution with such temperature value for 20-120 minutes.   c. adjusting the pH value of said complex enzyme water solution to 7.5-9.5, and adjusting the temperature of said complex enzyme water solution to 40° C.-70° C.; then, keeping said complex enzyme water solution at such temperature for 20-120 minutes.   d. conducting enzyme deactivation of the jute fibres processed with said complex enzyme.   
     
     
         2 . The method of  claim 1 , wherein said jute fibres are accumulation stored before the step d. 
     
     
         3 . The method of  claim 2 , wherein duration of accumulation storing said jute fibres ranges from 6 to 24 hours. 
     
     
         4 . The method of  claim 1 , wherein the enzyme deactivation of jute fibres in step d is through washing with hot water or adjusting the pH value of jute fibres, or through the combination of the two means. 
     
     
         5 . The method of  claim 1 , wherein the weight percentage of pectinase in said complex enzyme ranges from 30% to 90%. 
     
     
         6 . The method of  claim 1 , wherein the weight proportion of said complex enzyme and jute fibres ranges from 0.5:100 to 5:100. 
     
     
         7 . The method of  claim 4 , wherein the temperature of said hot water is above 75°; the pH value of jute fibres is adjusted to above 10.0 or below 4.0. 
     
     
         8 . The method of  claim 1 , wherein said jute fibres is pre-processed before the step a. 
     
     
         9 . The method of  claim 8 , wherein the pre-processing of said jute fibres is either through one of the means of water bath, acid bath, or soaking with hydrogen peroxide, or through the combination of at least two of the three means. 
     
     
         10 . The method of  claim 9 , wherein the temperature of the water bath ranges from 30° C. to 100° C.; said acid is sulphuric acid or acetic acid. 
     
     
         11 . A method of degumming jute fibres with complex enzyme, wherein said complex enzyme comprises pectinase and laccase, comprising the steps of:
 a. soaking the jute fibres in a water solution of said complex enzyme made from pectinase and laccase, wherein the weight proportion of said complex enzyme water solution and jute fibres ranges from 12:1 to 40:1.   b. adjusting the pH value of said complex enzyme water solution to 5.0-5.5, and adjusting the temperature of said complex enzyme water solution to 55° C.-60° C., then keeping said complex enzyme water solution with such temperature value for 51-120 minutes.   c. adjusting the pH value of said complex enzyme water solution to 7.5-8.0, and adjusting the temperature of said complex enzyme water solution to 60° C.-70° C.; then, keeping said complex enzyme water solution with such temperature value for 20-120 minutes.   d. conducting enzyme deactivation of the jute fibres processed with said complex enzyme.   
     
     
         12 . The method of  claim 11 , wherein said jute fibres are accumulation stored before the step d. 
     
     
         13 . The method of  claim 12 , wherein the duration for accumulation storing said jute fibres ranges from 6 to 24 hours. 
     
     
         14 . The method of  claim 11 , wherein the enzyme deactivation of jute fibres in step d is through washing with hot water or adjusting pH value of jute fibres, or through the both of the two means. 
     
     
         15 . The method of  claim 11 , wherein the weight percentage of pectinase in said complex enzyme ranges from 30% to 90%. 
     
     
         16 . The method of  claim 11 , wherein the weight proportion of said complex enzyme and jute fibres ranges from 0.5:100 to 5:100. 
     
     
         17 . The method of  claim 14 , wherein the temperature of said hot water is above 75° C.; the pH value of jute fibres is adjusted to above 10.0 or below 4.0. 
     
     
         18 . The method of  claim 11 , wherein said jute fibres are pre-processed before step a. 
     
     
         19 . The method of  claim 18 , wherein pre-processing of said jute fibres is either through one of the means of water bath, acid bath, or soaking with hydrogen peroxide, or through at least two of the three means. 
     
     
         20 . The method of  claim 19 , wherein the temperature of water bath ranges from 30° C. to 100° C.; said acid is sulphuric acid or acetic acid.