Soaping agent “Disperon G-55K”
Introduction
In the dyeing of knits or weaves of polyester or its blends,
staining trouble has become more pronounced along with the
spread of high-speed spinning, caused by the resultant increases
in the quantity of oligomers.
Moreover, staining is also increasing due to the decomposition
of liberated terephthalic acid during weight reduction treatment
with the use of caustic soda, a process now commonly carried
out for improved fabric hand.
An extended process of cold or warm washing is necessary for
the elimination of such trouble. There has been a greater demand
for a soaping agent that allows rationalization of the washing
process while being capable of dealing with staining of the
substrate and the dyeing machine. Disperon G-55K has been developed
in order to meet this demand.
Disperon G-55K is a soaping agent that achieves outstanding
results in the elimination of polyester oligomers and decomposed
terephthalic acid resulting from weight reduction. It also
ensures the amount of residue remaining as machine staining
is reduced to a minimum.
Description
| Appearance |
: |
Pale yellow translucent liquid |
| Main component |
: |
Special nonionic/anionic surfactant |
| Ionicity |
: |
Anionic |
| pH |
: |
3.5±0.5 (stock solution) |
| Viscosity |
: |
100cps or less |
| Solubility |
: |
Dissolves readily in water at room temperature |
Features
| * |
Compatible with a variety of recipes, being effective
in a broad pH range.
NB: While its pH is on the acid side, it does not reduce the effect of
scouring or reduction clearing. |
| * |
Prevents oligomers and the residue of weight reduction
treatment from staining yarn, fabric or dyeing machines. |
| * |
A chelate effect on metallic ions can be expected due
to the chelate component of the polycarboxylic acid content. |
| * |
Also effective as a machine cleaner after the disperse
dyeing of polyester. |
| * |
Because of its outstanding solubility, it will not
remain as residue on the substrate. |
Method of use
1. As a soaping agent for detached polyester after weight
reduction
treatment with caustic soda
Use in soaping (warm rinsing) after weight reduction treatment
with caustic soda and before neutralization with acid. The
recommended amount is 1-3g/L. The quantity should be determined
by the degree of weight reduction required.
2. As an oligomer remover
In scouring or reduction clearing (RC)
- Use in conjunction with a scouring agent for the removal
of oligomers produced during spinning (quantity: 0.5-1g/L)
- With a reduction clearing agent (caustic soda, soda ash,
sodium hydrosulfite) for the removal of oligomers produced
during dyeing (quantity: 1-2g/L)
- As a cleaning agent for dyeing machines (quantity: 3-5g/L)
While quantities in the recipes above are used as standard
based on our test data and practical conditions, the method
is not fixed and should be determined upon after preliminary
testing.
Oligomer dispersion test
In order to assess performance in dispersing oligomers, the
degree of dispersion was compared with and without Disperon
G-55K in the black paper filtration of oligomers, extracted
with the use of dioxane into an acidic or alkaline solution.
(1) Test on dispersion in acidic solution (to simulate oligomer
remaining
during dyeing)
| Oligomer solution |
10cc/200cc |
| Disperon G-55K |
0.5g/L |
| Acetic acid |
pH=5 |
The dispersing agent was add to the test solution with pH
adjusted to 5 using acetic acid while being stirred. After
the temperature was raised to 130ﾟC then cooled to
80ﾟC, suction filtration was carried out using black
filter paper.
(2) Test on dispersion during reduction clearing
a) Reduction clearing for pale to
medium shades (pH 10)
| Oligomer solution |
10cc/200cc |
| Disperon G-55K |
0.5g/L |
| Acetic acid |
pH=10 |
b) Reduction clearing for deep shades
(pH 12)
| Oligomer solution |
10cc/200cc |
| Disperon G-55K |
0.5g/L |
| Caustic soda |
pH=12 |
Suction filtration with black filter paper after 80ﾟC
x 15min
Properties of wastewater
Attribute (concentration) |
BOD (1g/L) |
COD (1g/L) |
n-hexane (10g/L) |
Measurement |
64mg/L |
371mg/L |
45mg/L |
Packaging
18kg can
200kg drum
Directions for use
- Verify compatibility with other chemicals before use. Dilute
with cold or warm water before addition.
- Verify performance and other factors during treatment or
after use as required.
Handling instructions
- Ensure that the workplace is well ventilated and avoid
contact with the eyes and skin. Use protective clothing as
required. Wash hands and face thoroughly after use.
- In the event of direct contact with the eyes, wash the
eyes immediately under running water for 15 minutes or more,
and seek prompt medical attention.
- In the event of swallowing, spit out immediately (but do
not induce vomiting if unsuccessful), and seek prompt medical
attention.
- In the event of inhalation, remove immediately to fresh
air, rest and preserve body heat. Seek medical help if required.
- Use this product as soon as possible and avoid outside
storage. Store in a cool, dry place at a temperature between
5-35ﾟC away from direct sunlight in air-tight conditions.
- For further details, please refer to the Material Safety
Data Sheet.
| While the information presented here is based on data
from exhaustive in-company testing, it does not guarantee
results in practical use. The description above is subject
to change according to improvements in performance or
specifications. There is no guarantee that any patents
or legal rights are not infringed upon, with regard to
the specifications for this product. |
|