Description
SF9180A/SF9180B is a two-component solvent-free aromatic polyurethane adhesive that can be fully cured to form an elastic film with good laminating strength and heat-sealing strength. It demands shorter curing time than other normal adhesives. SF9180A/SF9180B is low-viscosity adhesive specially designed for purpose of excellent optical property, high speed machine running,short curing time before slitting(5+ hours under 45℃),lower coating weight, easy cleaning on machine.
Technical Properties
Item | SF9180A | SF9180B |
Type | Isocyanate prepolymer | Polyol |
Ingredient | NCO | OH |
Appearance | Yellowish transparent liquid | Yellowish transparent liquid |
Density（g/cm3） | 1.161 | 0.998 |
Solid Content(%) | 100% | 100% |
Viscosity (BKF25℃) | 3500±500cps | 450±200cps |
Mix Ratio in Weight (KGS) | 100 | 55 |
Mix Ratio in Volume (CBM) | 100 | 64 |
Typical Features:
l Health: Since no solvent is used in the process, there will be no impact on the physical and mental health of workers;
l Environmental protection: No exist solvent emissions pollution to the environment;
l Security: There is no danger of fire and explosion in the process of safe transportation and use, and there is no need to install explosion-proof facilities;
l Energy conservation: Consumed power is less than half of that of dry lamination
l High efficiency : For example, PET/AL laminating speed could be up to 260m/min, PET/PE laminating speed could be up to 400m/min; Curing time for general packaging demands round 5 hours under 45℃before silitting,
l Economical coating: coating weight ( 1.2~2.0g/m2)
l Wide application: Widely used in laminating of various material like BOPP, CPP, LDPE, PET, PA, Aluminum foil and metalized film etc with any model of solvent-free laminator (automatic or manual mixing both can be used)
Coating weight and mix ratio
Films Laminating Structure | Coating Weight | Mix ratio |
Plain films：BOPP/CPP，BOPP/PE，PET/PE，PA/PE,PET/CPP | 1.0-1.3 g/ m2 | 100:55 |
Printed films：BOPP/PE，BOPP/CPP，PET/PE，PET/CPP | 1.8-2.2 g/ m2 | |
PA/PE，PET/CPP, VMPET/PE，VMPET/CPP, AL/PE | 1.4-1.6 g/ m2 | |
Printed PET/AL, PET/PET, | 1.8-2.2 g/ m2 | |
BOPP/VMOPP,BOPP/VMCPP，BOPP/VMPET,PET/VMPET, PET/VMCPP | 1.8~2.2g/ m2 | 100:60 |
The above is for reference only, please adjust according to the actual situation (film thickness, ink area, temperature and humidity of the workshop, equipment status).
Laminating Temperature:
please find following different recommended operating temperatures in different processing sections.
Item | Temperature ℃ | Remark |
A Component | 40~45 ℃ | When the temperature is low in winter, the temperature can be appropriately increased |
B Component | 35~38 ℃ | |
Feeding Tube | 35~40 ℃ | Please make adjustments according to the actual situation. For example, when high frictional coefficient films are required or PE film is required to be relatively thin in second laminating, the laminating temperature can be properly reduced, and the cooling roll can be opened if possible. In winter conditions, the cooling roller can be changed to a heating roller, and then the laminated aluminumized films or thick PE films can have good leveling properties. |
Transfer Roller | 35~40 ℃ | |
Coating Roller | 35~40 ℃ | |
Laminating | 35~45 ℃ | |
Curing Chamber | 40~50 ℃ | |
Curing time | ＞4 hours (40~50 ℃); ＞12 hours (25 ℃) | The special structures have to be curing for longer time, such as boiling grade, retorting grade, etc. The actual requirements shall prevail. |
Note: When the temperature is low in winter, the adhesive should be put into the curing room in advance for more than 4 hours. To ensure a suitable operating environment, please pay attention to the environmental temperature and humidity in the summer, the moisture absorption of the film, and solvent residual of the printed film, etc. Otherwise, it is easy to lead the adhesive sticky and other problems, the operating humidity should not exceed 80%. When the humidity is low in winter, the mix ratio should be properly adjusted.
Performance Index
SF9180A/SF9180B (mixed by weight of 100:55~60) is applied to typical flexible packaging structures and is fully cured up to final peeling strength for your reference (N/15mm).
Cleaning
After production, the surface of the device is cleaned with a suitable solvent to prevent it from being hard to clean after curing.
Package
200L barrel or 20L drum; One 20GP container could be loaded with total 16000KGS net weight in total 80 barrels (200L)
Safety & Storage
This product should be stored in the room without direct sunlight at temperature 15-25 °C, shelf life would be 12 months in unopened drums, it should be used as soon as possible after drum opened.
Attentions
l When laminating different types of ink or transparent ink film, it is necessary to confirm whether it is suitable
l The LDPE and CPP films must be corona-treated with a surface tension greater than 40 mN/m. The PA film must be double-corona treated as an intermediate layer. The surface tension of the PET film must not be Less than 52 mN/m.
l When laminating PET printed film, confirm whether the appearance meets the requirements or not with lab test at first
l If the contents of the package are corrosive, please confirm and start production
l The temperature and humidity of the environment have a great influence on the time for storing the configured adhesive. It is recommended to arrange the adhesive in small quantities for a few times in high temperature and high humidity weather to avoid waste
l During the laminating processing, care must be taken to check and control the viscosity.
l Residual adhesive: The remaining adhesive cannot be used in principle. If the amount of residual liquid is excessive, it shall be sealed and stored in cool place after dilution, which could be used as diluent for operation in next day, and a small amount shall be little by little added to the newly prepared adhesive solution. It cannot be used any more, if it appears cloudy, translucent or thickened.
l In actual production, if other types of OCHEM solvent-free adhesive are replaced, the cylinder, pipelines and rollers may not be cleaned. If solvent free adhesives other than OCHEM adhesives are replaced, the user must perform thorough cleaning of the feeding system.
l Please stop using adhesive and then contact us when you find that the adhesive has become turbid or there is agglomeration.