Laminating inks for reverse gravure printing - Solvent based inks.
2. Name : Q - Chromax OPP3. Features and Uses:- Q - Chromax OPP is a type of gravure laminating ink system, was applied for treated OPP, BOPP film with surface tension more than 38 dyne/cm
- Q - Chromax OPP supports various complex laminating processes like drying laminating, extrusion laminating to give ideal laminating strength for PE resin. In addition, for using in PP extrusion laminating, adding about 10% adhesive intensifier to give fair laminating strength.
- Good in chemical resistance
- Leave less residual solvent
- Good ink transfer and printability
- Good static resistance
- Heavy metal contents in the ink meet ASTM F963-96a 4.3.5 & 8.3 and EN 71-3:1994 testing standards
4. Main Compositions:- Resin : Chlorinated Polypropylene (CPP)
- Pigment : Organic/ Inorganic pigment
- Additive : Synthetic wax
- Solvent : Toluene / MEK / Isopropanol (IPA)
5. Physical Properties:
|
Colour
|
Code
|
Net weight (kg)
|
Viscosity
(sec)
|
Light fastness
|
Water
Resistance
|
Acid& Alkali
Resistance
|
|
Full
|
Tint
|
|
White
|
W001
|
20
|
30- 60
|
AA
|
AA
|
A
|
A
|
|
Yellow
|
Y203
|
17
|
35- 65
|
B
|
C
|
A
|
A
|
|
Red
|
R106
|
17
|
35- 65
|
B
|
C
|
A
|
A
|
|
Red
|
R102
|
17
|
35- 65
|
B
|
C
|
A
|
A
|
|
Orange
|
O307B
|
17
|
30- 60
|
B
|
C
|
A
|
A
|
|
Green
|
Gr401
|
17
|
30- 60
|
AA
|
A
|
A
|
A
|
|
Blue
|
B301
|
17
|
35- 65
|
AA
|
A
|
A
|
A
|
|
Violet
|
V703
|
17
|
35- 65
|
A
|
B
|
A
|
A
|
|
Black
|
BL501
|
17
|
35- 65
|
AA
|
A
|
A
|
A
|
|
Medium
|
Me
|
17
|
20÷ 40
|
|
|
|
|
Remark:
- Fineness: < 10 microns
- Viscosity: measured by Zahn No.3 Jis
- Acid resistance:
Dipping into solutions of 3% hydrochloric acid and 7% acetic acid; slightly colouring of
solution, but no change in shade of ink film after 30 mins.
- Alkali resistance:
Same result as acid test after 30 mins. Dipping into solution of 2% NaOH at room
temperature.
- Water resistance:
Same result as acid test after 30 mins. Dipping into water at room temperature.
A : No change
B : Slightly colouring of solution but no change of shade of ink film
C : Slightly fading of shade of ink film and a little colouring of the solution
D : Fading pretty much
- Light fastness:
Tester: Sun Tester 575
Distance from light source to substance: 300 mm
Full: high concentration (colour ink : white ink = 1: 0)
Tint: low concentration (colour ink : white ink = 1:10)
The degree of resistance:
AA : No fading after 60 hours
A : Fading after 35 - 60 hours
B : Fading after 15 - 35 hours
C : Slightly fading after 15 hours
D : Fading much within 15 hours
6. Thinner:
|
SpeedMachine
|
Mixedsolvent
|
|
%Toluene
|
%EA
|
%MEK
|
|
£150m/min
|
80
|
|
20
|
|
150–200m/min
|
70
|
30
|
|
|
200–300m/min
|
50
|
20
|
30
|
Note:EA:EthylAcetate,MEK:MethylEthylKetone
7. Attention for Users:
- Stir well before using.
- The fineness of previously used inks should be tested before using because a long-term storage can cause an ink agglomerate. Only mix 10 – 30 % previously used inks into fresh inks and sieve carefully by filter screen 100 µm or metal screen 120 mesh.
- Using the ink supply system together filter screen equipment and circulating pump to prevent inks from skinning, foreign matters as well as to stabilize colour strength.
- For the printing with less ink consumption and small printing plate, moisture can be easily introduced due to long contact with air, leading to thickening and filling-in. To prevent these phenomena, slow drying solvent should be used in so far as possible, and humidity of working areas should be controlled at 55 – 65%.
- Ensuring a good blocking resistance, it’s necessary to control adequate drying rate.
Medium usage:
For printing, medium is added into inks to decrease colour strength, depends on the cell- deepness of cylinders. Generally, 10 – 15% medium should be mixed into fresh inks. In special cases, the medium content used is a higher ratio. We recommend the medium ratio as follows:
Medium rate ≤ 10 – 15% : using non-additives medium.
Medium rate > 15% : using medium with additives.
8. Safety and storage information:
- The products contain flammable liquids. Thus, it’s necessary to keep a working area ventilating or install a exhaust system of ventilation. Keep away from heat, spark/flame, and static electricity.
- Storage and handling at 15 – 25oC.
- Avoid contact with skin and eyes.
- Shelf life: 6 months after date of manufacture (in condition 15 – 25oC).