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Polyurethane staining inhibitor

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.

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 specimen : Polyester/spandex(operon)
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 (5g/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×30min. 
●Explanation of test data

Reduction clearing agent performance test

Soaping properties of Emill NW-1570 (colorfastness to washing, absorption in residual-liquor) were tested following the method below.
Test spscimen : Polyester/spandex(operon)
Colorfastness comparison tests
(1) Washing fastness
:JIS A-2 method (5g/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×30min.
●Explanation of test date
Dyeing conditions are the same in 1B, 2B and 3B, with no anti-staining agent used.
RC=Hydrosulfite 4g/L, NaOH (flake) 2g/L in all cases
  1B  No soaping agent used
  2B  Emill NW-1570 2g/L used
  3B  A competitor's soaping agent 2g/L used
KOTANI CHEMICAL
13-14, CHIKKO HAMADERA NISHI MACHI, NISHI-KU, SAKAI CITY, OSAKA 592-8352, JAPAN
Phone:+81 72 268 0291
FAX   :+81 72 268 0293
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