TLP
NEUTRAL
(Neutral cellulase)
INTRODUCTION:
TLP
NEUTRAL is M.L. latest development in the
area of enzymes for finishing of cellulosic materials
like cottons, Viscose, Tencel etc and is widely used
for giving stone washed effect on Denims. TLP
NEUTRAL is a neutral cellulolytic enzyme.
Enzymes are obtained on fermentation of genetically
engineered, non – pathogenic moulds. TLP
NEUTRAL imparts greyish cast to the Indigo
after enzyme washing.
ADVANTAGES
OF USING ENZYMES:
| 1. |
Unlike
stones, enzymes are specific in action and hence
create a very consistent, homogeneous effect. |
| 2. |
Enzymes
are produced by controlled fermentation and hence
batch wise quality can be maintained. |
| 3. |
Fabric
damage losses are almost nil. |
| 4. |
Machine
damage does not occur. |
|
5. |
Enzymes
are user friendly and the process is less laborious. |
| 6.
|
Washing
discharges are completely biodegradable and hence
eco-friendly. |
APPLICATION
Enzymatic
“stone washing or Bio washing” as it is
referred to comprises of 3 main steps:
DESIZING
BIOWASHING
FINISHING
DESIZING
:
This
is the first step in Biowashing and involves the removal
of the starch size from the denim fabric / garment
using a starch – hydrolyzing enzyme system such
as DEL DESIZING. Desizing is recommended
to be carried out at an optimal pH range of 6.5 - 7.0
and an optimal temperature range of 65 - 70 deg C (150
– 160 deg F) for a period of 20 mins with a
DEL DESIZING dose rate of 4 to 6
grams per Kg. of denim fabric / garment ( 1.4 oz per
100 lbs of denim fabric). However, the effective range
of temperature and pH as well as the Enzyme dose level
is wider than the above optimal range and may be adjusted
based on individual requirements. M.L.’s Technical
services will be only too pleased to provide any assistance
on desizing.
SIGNIFICANCE
OF SIZE REMOVAL:
If
the size is not removed up to the desired extent,
the crease marks might remain in the denim, Which
in turn can cause streaks. The final effect and stiffness
of the Denim can also be controlled by controlling
the extent of desizing.
TIPS
TO REDUCE CREASES :
| 1. |
Denim
Trousers etc., can be steam blown before desizing. |
| 2.
|
Pre
wetting and soaking can be done with suitable
wetting agents. |
| 3. |
Trousers
can be turned inside out while desizing. |
| 4.
|
Lubricators
can be used while pre- wetting. |
| 5. |
Enough
water level during Desizing operation has to be
ensured. |
BIOWASHING
:
On
completion of desizing which is traditionally checked
by “ handfeel” to observe absence of “stickiness”,
the liquor is drained and rinsed with plain water.
The fabric / garment is then steeped in water at a
ratio of approximately 1:5 to 1:10 and the temperature
is raised to 55 Deg C. The starting pH of water should
be at 6.0 .
TLP NEUTRAL is then dosed
at 5-10 gms per garment. Bio washing is carried out
for a period of 60 to 90 mins depending on the tint
and enzyme effect desired ensuring that the temperature
is maintained between 50 - 55 Deg C.
| PARAMETERS |
OPERATIONAL
RANGE |
| Temperature |
50
- 55°C |
|
pH |
6 - 7 |
| Dosage |
0.5 - 1 % on wt. of fabric |
| Time |
60
to 90 min |
| M/L
ratio |
8:1 to 15:1 |
|
FINISHING
:
At
the end of Biowashing which is evaluated by the required
“ stone washed appearance, the liquor is drained
and the denim fabric / garment is rinsed with plain
water to remove the surplus indigo and loose colour.
TLP NEUTRAL creates excellent Abrasion
on the denim with grey casting. The denim is then
washed with a heavy duty detergent for approximately
20 minutes at 65 Deg C. At the end of this detergent
wash, the liquor is drained and the denim is rinsed
at least twice with plain water and then finished
off with a 5 minute wash with brightener, softeners
etc.
PACKING
:
TLP
NEUTRAL is available as off white coloured
powder in standard 25 Kg HDPE Drum.
STORAGE AND HANDLING :
TLP
NEUTRAL should be stored in preferably cool
and dry place. Care must be taken to ensure that the
containers are kept closed after use to prevent moisture
entry into the product. Other handling instructions
are available on request.
SHELF LIFE :
TLP
NEUTRAL is stable under recommended storage
conditions for a period of 6 months with less than 10%
drop in activity. M.L.’s standard assay method
for cellulase activity is available on request
TECHNICAL
SERVICE :
M.L.CHEMICALS
(INDIA) PVT.LTD provides technical assistance related
to the application of enzymes in the textile industry.
|
