DEL
DESIZING
(Desizing Enzyme) |
PRODUCT INFORMATION
DEL
DESIZING is an alpha amylase enzyme derived
from a selected strain of Bacillus.It promotes the
rapid removal of starch sizes by breaking down the
starch in to soluble dextrins.
DEL DESIZING can be used in textile
mills to remove the starch sizes from grey fabric
and in Desizing of denim garments.
In
Denim processing desizing is a very important step
to obtain a good finish.If the size is not removed
rapidly,the irregular folding of denim might lead
to formation of streaks that are undesirable.Whether
it is an indigo Denim washing or Denim over-dyeing,
a proper desizing leads to a development of superior
result. It is possible to get a homogeneous streak
free finish by using DEL DESIZING .Typical usage conditions
for DEL DESIZING for desizing denim garments are:
METHODS OF DEL DESIZING
Some
methods employ strong oxidising agents such as ammonium
per sulphate or hydrogen peroxide at high pH and temperature
and certain other methods involve use of hot dilute
hydrochloric acid treatment for removing size polymers.
Although these methods given very quick desizing,it
reduces the tensile strength.
The enzymes are capable of breaking starch sizes completely,without
affecting the cellulose fibre.
PROCESS CONDITIONS
PARAMETER
CONTINOUS |
JIGGER
OR
WINCH |
PAD-ROLL
PIT |
J-BOX
OR |
DOSAGE
(gm/ 100 Lts) |
100-150
|
150-200
|
200-250 |
NON-IONIC
WETTING AGENT
(gm/Lts)
|
1 |
1 |
1 |
CALCIUM
CHLORIDE*
(gm/100 Lts) |
16 |
16 |
16 |
SODIUM
CHLORIDE
(gm/ Lts)
|
10
|
10
|
10
|
| TEMPERATURE
|
60 - 70°C
|
60 - 70°C
|
60 - 70°C |
|
pH
|
6.5 - 7.5
|
6.5 - 7.5
|
6.5 - 7.5 |
| PICK-UP
|
1
|
1
|
1
|
|
*In case
of soft Water (condensate or demineralized )
PROCESS CONDITIONS FOR DENIMS
| PARAMETERS |
OPERATIONAL
RANGE |
| Temperature |
60 - 70°C |
|
pH |
6 - 7 |
| Dosage |
.5 - 1 % |
| Other
additives |
Wetting
Agent* |
| Time |
20
to 30 min |
| M/L
ratio |
1:8
to 1:15 |
| Others |
Cold
rinse |
|
*
Optional
If Desizing is done at a lower temperature, a higher
dosage of the enzyme must be employed.In case of heavily
sized and thick Denim, a lubricant can be used during
Prewetting. A non-ionic softener can be a Lubricant.
For
a heavily folded Denim, an inside out turning during
Desizing or a steam blowing before Desizing is prescribed.
Denim
washing machine should not rotate continuously before
a minimum of
45 - 50°C is attained.
TYPICAL CHARACTERISTICS
|
Appearance |
White
to Tan coloured powder |
|
Solubility |
Soluble
in water |
|
Optimum pH |
5.0
- 8.0 |
|
Operating Temp |
60
- 80°C |
|
STORAGE
DEL
DESIZING should be stored in a cool and dry
place. At Storage temperature of 25-30 deg°C and
under dry conditions it will retain its activity for
at least
6 months without any significant loss.
SHELF
LIFE :
DEL
DESIZING is stable under recommended storage conditions
for a period of
12 months with less than 5% drop in activity.
PACKING:
DEL
DESIZING is available in 25 Kgs HDPE Bags.
|
