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Enzymes for textile Industry

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Enzymes for textile Industry

  1. 1. ENZYMES FOR TEXTILE INDUSTRY Nadeera Dodamgoda Dpt of Chemical and Process Engineering University of Moratuwa
  2. 2. WHAT ARE ENZYMES? • biological catalysts for biochemical reactions • Every enzyme has a specific function • accelerate the reaction rate by reducing the activation energy.pH and temperature sensitive. • Stable and work in mild conditions • Categorized according to the compounds they act upon. Ex: Cellulase enzyme for Cellulose, Lipase for lipids
  3. 3. ENZYME HYDROLYSIS
  4. 4. Reaction of Cellulase Enzyme
  5. 5. APPLICATIONS • Food & Diary Industry – Amylase, Protease, Rennin, Lipase, Lactase • Brewing Industry – Amylase, glucanases, proteases • Paper Industry – Amylases, Cellulases, ligninases • Biofuel Industry – Cellulases, Ligninase • Textile Industry - Cellulase, Lipace
  6. 6. OBJECTS OF GARMENT WASHING • To remove starch that applied during fabric manufacturing - Desizing • To soften the garment hand feel and improve bulkiness • To remove dirt, spots, oil stains that accumulate to garment at the garment manufacturing processes. • To remove chemicals used during printing process and embroidery process
  7. 7. USAGE OF ENZYMES IN TEXTILE INDUSTRY • De sizing • Enzyme washing – Makes the garment softer and more supple(Hand feel). Used to get various wash looks • Enzyme stone washing • Bio polishing • Remove stains
  8. 8. Desizing • It is the process of removing the sizing material from the warp yarns after the textile fabric is woven. • Desizing methods: Enzymatic, Oxidative, Acid, Removal of water soluble sizes Advantages of using Enzymes • Less time required • No damage to the fiber • Biodegradable • Closely constructed fabric can be easily desized due to the effective enzyme action
  9. 9. Suppliers
  10. 10. Bioscouring Enzymatic Scouring or Bio-Scouring can simply be defined as the application of living organisms and their components to remove the natural and added impurities. Conventional scouring requires high temperatures and high consumption of chemicals. Suppliers
  11. 11. •Bleach Cleanup • Natural fabrics such as cotton are normally bleached with hydrogen peroxide before dyeing. Bleaches are highly reactive chemicals and any peroxide left on the fabric can interfere with the dyeing process. Therefore a thorough ‘bleach clean- up’ is necessary • The traditional method is to neutralize the bleach with a reducing agent or to rinse with hot water. Both the methods require copious amounts of water Advantages of using enzymes for clean up • Less environmental pollution • easier and quicker to use • Less water & energy consumption • Less amount is needed • Safe to use
  12. 12. •Suppliers
  13. 13. TYPES OF ENZYMES • Acid Enzymes – Ex: Bio polishing 75L Conditions: pH 4.5 ,Temperature: 550C Used to remove pilling , suitable for cotton fabrics • Neutral Enzymes – Ex: Coldzyme LCS Conditions: pH 6-6.5, Temperature: 400C Suitable for light weight fabrics Ex: Linon • Alkali Enzymes – Ex: Adzyme RDC Conditions: pH 8.5, Temperature: 550C Used to get a good high low property
  14. 14. SUPPLIER CHEMICAL NAME PRODUCT NAME USAGE Resil •Amaylases • Acid cellulases • Neutral cellulases Ezysize Ultima Ezysize 3XXL Ezysize Flex conc Ezysoft XCL Ezysoft BSE Ezysoft 300L Ezycare Neutra Max Ezycare Neu Desizing agents Bio polishing agents High contrast finishing Minimal backstaining Chromotech •Cellulase •Alpha Amaylase Chromolase Bio P Chromolase THN Chromolase HTE Chromolase LTE Bio polishing Stone wash effect Desizing agents
  15. 15. ADVANTAGES OF USING ENZYMES • Energy saving – Active in mild conditons. Low temperatures and moderate pH • Cost saving – a reduction in the amount of chemicals used • Time saving – Powerful, less time needed • Eco friendly – Fully bio degradable • Each enzyme has a specific function Ex: Polyesterase will not attack the cotton part in a cotton polyester fabric. It will only hydrolyze the polyester part.
  16. 16. BIO POLISHING-DE PILLING ENZYMES • Fabric pilling is the formation of small, fuzzy balls on the surface of a fabric • Enzymes are used to remove pilling Ex: Cellulase is used to remove pilling in cotton fabric • Enzymes in controlled conditions, hydrolyze and break the protruded fiber parts on the fabric surface. This is called de pilling.
  17. 17. REACTION BETWEEN ENZYEME & POLYESTER • As in cellulose cellulase reaction, the polyesterase enzyme can hydrolyze the ester bond.
  18. 18. THANK YOU

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