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When polyester/polyurethane blends or union goods are dyed, disperse dye tends to stain the polyurethane side, which causes troubles such as dullness in shade, poor reproducibility and insufficient
fastness.
UNIONAL EU is a disperse dye, which has excellent stain resisting effects on polyurethane and this product improves fastness and also improves build-up effects on polyester side.
 Properties and aspects
| Appearance: |
dark brownish liquid. |
| Component: |
natural tannin compounding ingredient |
| Ionicity: |
anionic |
| pH: |
about 2.5 (1 % solution), less than 1 (non-diluted) |
| Solubility: |
water soluble |
Characteristics
- When polyester/polyurethane is dyed, UNIONAL EU enhances polyurethane's resistance to disperse-dye staining.
- UNIONAL EU also enhances the build-up effects of disperse dye on the polyester side.
Usage
When the exhaustion dyeing is done in polyester/polyurethane, UNIONAL EU is added to a dye bath containing disperse dyes. Depending on the mixture ratio, the type of the dyestuff or the concentration,
the standard amounts are as follows.
Reduction clearing should be carried out after dyeing to improve anti-yellowing effects and fastness.
Performance test
1.Resistance of polyurethane to disperse-dye.
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Test specimen : |
polyester double pique / |
*LYCRA knitted fabric (90/10) |
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*LYCRA is preliminarily scoured. |
Dyestuff :
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(1) Miketon Poly. Red USP-4 |
4 %(o.w.f.) |
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(2) Kayalon Poly. Black EX-SF 200 |
6 %(o.w.f.) |
Stain resisting agent :
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0) None |
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1) UNIONAL EU |
2.5g/L |
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2) UNIONAL L |
2.5g/L (our stain resisting agent for Nylon.) |
Dyeing conditions :
Result : 1)
Table 1 Stain resistant effects on polyurethane
2.Wet fastness in polyester/polyurethane.
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Test specimen : |
polyester/LICRA (80/20) |
bare gray sheeting |
Dyestuff :
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(1) Miketon Poly. Yellow USP-3 |
4 %(o.w.f.) |
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(2\) Miketon Poly. Red USP-4 |
4 %(o.w.f.) |
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(3) Kayalon Poly. Black EX-SF 200 |
6 %(o.w.f.) |
Stain resisting agent :
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0) None |
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1) UNIONAL EU |
2.5g/L |
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2) UNIONAL L |
2.5g/L |
The dyeing conditions are the same with 1).
Result : 2)
Table 2 Test results of fastness on polyester/LYCRA
3.Bleeding test by perchloroethylene on polyester/ployurethane.
Using the same cloth as in 2.
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As shown in the drawing on the right, a test cloth and a filter paper were placed between the plates and then a perspirometer was set. It was kept at room temperature for 4 hours under a 1kg weight. |
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Table 3 Bleeding test
CAUTION
This agent should be used after enough tests are done.
NET WEIGHT
20 kgs.
PRECAUTION
This agent is strongly acidic, therefore care should be taken in use.
| 1) |
This agent is very corrosive, therefore, in handling, protective gloves, goggles and clothes should be worn. Direct contact should be avoided.
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| 2) |
If the product comes into contact with your eyes or accidentally gets into your mouth, it is recommended to thoroughly rinse (for at least 15 minutes) the affected area with tap water immediately
and see a doctor.
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| 3) |
After use, you should wash your hands and gargle sufficiently.
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| 4) |
Containers in use should be perfectly sealed and foreign bodies should not be allowed to enter.
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| 5) |
When this agent is stored, you should follow the relevant ordinance and it should be kept in a cool (5 to 35 ) dark place, and direct
sunlight should be avoided.
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| 6) |
When it is disposed of, it should be dealt with as industrial waste. |
CAUTION
This agent should be used after enough tests are done.
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