This document discusses the effect of cold enzyme washing on cotton-tencel denim fabrics. It introduces tencel fiber and its use in denim fabrics. Cold enzyme washing is proposed as an environmentally friendly alternative to conventional enzyme washing that uses lower temperatures. The document outlines the cold enzyme washing process and provides data on the weight loss, k/s values, GSM change, color fastness, and wicking ability of cotton-tencel samples after being cold enzyme washed. Further testing of properties like tensile strength, thickness, air permeability, pilling, and tearing strength is recommended.

1. Effect of cold enzyme washing on
physical and mechanical properties
of cotton-tencel denim fabrics
Supervisor: Prof. changhai Yi
Prepared by:
Rajib Chandra Gosh

2. Introduction
• Tencel fiber has been reinvented by denim
designers as the perfect complement to
today’s fashion trends.
• jeans with tencel fibre are attractive, durable
and become immediate favorites thanks to
their enhanced comfort.
• The key performance criterion of cotton-
tencel denim fabric is moisture management
which determines the comfort level.

3. • The removal of the surface fibrillated hairs
from cotton-tencel denim fabrics by cold
enzyme can be effected , with minimal effect
on the bulk of the fabrics.
• Vintage look of denim fabric is very
fashionable and it is the main attraction of
young generation

4. • Industrial washing is one of finishing method
of garments such as jeans which is mostly
used in textile industry
• with the advent of technologies and
equipment to get over dyed-look, damaged-
look, scrubbed-look

5. Denim washing
Denim washing is the aesthetic finish given to the
denim fabric to enhance the appeal and to provide
strength.
There are two types of denim washing :
1. Wet process
2. Dry process

6. Wet process of denim
There are many kinds of wet process:
• Rinse wash
• Enzyme wash
• Enzyme bleaching wash
• Softeners wash
• Acid wash
• Rubber ball wash
• Resin wash
• Garments wash

7. Enzyme wash
• Enzyme washing is a laundering
process that uses enzymes to
clean clothing or to finish cotton.
• In the case of jeans and other
garments with a worn in look

8. Conventional enzyme wash
Working condition:
• Temperature= 45-50c
• Time =30-35
• Ph= 4.5-5

9. Why cold enzyme washing
Reasons for using cold enzyme wash:
• Time consumption
• Temperature saving
• Eco-friendly

10. Cold enzyme wash
• Working condition:
• Temperature = 20-35°c
• Time =20-35 minute
• PH = 4- 4.5

11. Cold enzyme washing
Flow chart of denim washing by cold enzyme :
Desizing(60 °C ,20 MIN with water)
Rinse wash(5”×2)
Cold enzyme wash
Rinse wash ( 2 times)
Drain

12. Front loading machine

13. Working condition
SAMPLE TIME TEMPERATURE
1 20 34
2 18 32
3 15 29
4 10 28

14. Determination of weight loss
Samples no Before wash (gm.) After wash(gm.) Weight loss%
Sample 1 267 268 -0.3%
Sample 2 274 274.5 -0.2%
Sample 3 247 246.5 0.2%
Sample 4 254 256 -0.7%

15. k/s value
Samples After ( cold enzyme wash) Before wash
1 15.018 16.599
2 15.301 16.888
3 15.400 16.522
4 15.428 16.578

16. GSM Change

17. Color fastness to rubbing

18. Wicking test

19. Need to test
• Tensile strength
• Thickness
• Air permeability
• Pilling
• Tearing strenght
• SEM
Etc………………………

20. Thank you very much