Polyurethane staining inhibitor/RC agent for disperse dyes
Neoleve SDX-D, Emill NW-1570| On dyeing Polyester/spandex blends with disperse dyes,
reproducibility deteriorates as disperse dyestuff stains heavily on
(is adsorbed into) spandex. This kind of dyeing also often involves
other trouble such as production of insufficient fastness. By
adding Neoleve SDX-D to the dye bath, it potently prevents disperse
dye from staining on (being adsorbed into) spandex, and helps its
further distribution in polyester. Furthermore, Emill NW-1570 used
in Finishing after dyeing further washes off stains, leading to
good reproducibility and colorfastness to washing/dry-cleaning
(less staining in test liquor). |
Standard usage
Disperse dyestuff is adsorbed in spandex up to around 100°C, then
as the temperature rises, it begins shifting onto polyester. Higher
temperature is preferable, however, with spandex' other physical
characteristics taken into consideration, dyeing is normally
carried out around 120°C. If the spandex blending rate is so low
that its colorfastness can be ignored, soda ash instead of caustic
soda (NaOH) is used.
Example n anti-staining agent and soaping agent
Test specimen: Polyester/spandex (operon) <Anti-staining agent performance test> Anti-staining properties of Neoleve SDX-D (colorfastness to dry
cleaning and washing, residual-liquor absorption) were tested
following the method below. [Test method] Colorfastness comparison tests | 1) | Dry cleaning fastness: | Fabric, after being set, is folded into a small piece, soaked in
dry cleaning liquor for 5 minutes and left on filter paper No. 5B
until dry. | | 2) | Washing fastness: | JIS A-2 method (5 g/L marseilles soap, 50°C x 30min) with white
silk and polyester pieces attached | | 3) | Absorption in residual liquor: | nylon jersey added in the residual liquor of the washing fastness
test, 80°C x 30 min |
[Test data] 1A Anti-staining agent not used in dyeing
2A Neoleve SDX-D 4% (o.w.f.) used in dyeing
3A A competitor's anti-staining agent 4% (o.w.f.) used in dyeing |
| | RC conditions are the same in 1A, 2A and 3A.
| Hydrosulfite | 4g/L | | NaOH (flake) | 2g/L | | Emill NW-1570 | 2g/L |
|
Colorfastness of 1A, 2A and 3A were examined after being set and
performances of anti-staining agents were compared. | 1) Dry cleaning fastness: | the less bleeding denotes the better performance. | | 2) Washing fastness, | washing fastness tested based on JIS A-2 method with white silk and
polyester pieces attached. After taking out the pieces, nylon
jersey added in the residual liquor, 80°C x 30 min. The paler color
denotes the better performance. | | 3) Absorption in residual liquor: |
[Results]
Reduction cleaning agent performance test
Soaping properties of Emill NW-1570 (colorfastness to washing,
absorption in residual-liquor) were tested following the method
below. [Test method] Tested specimen: Polyester/Spandex (operon)
Colorfastness comparison tests
| 1) | Washing fastness: | JIS A-2 method (5 g/L marseilles soap, 50°C x 30 min) with white
silk and polyester pieces attached. | | 2) | Absorption in residual liquor: | nylon jersey added in the residual liquor of the washing fastness
test, 80°C x 30 min |
[Test data]
Dyeing conditions are the same in 1B, 2B and 3B, with no
anti-staining agent used.
RC = Hydrosulfite 4 g/L, NaOH (flake) 2 g/L in all cases
|
