Description
SF9220A/SF9220B is a two-component solvent-free aromatic polyurethane adhesive that resists 121℃/40min in foil/film and film/film packaging, retaining high peeling strength and heat sealing strength for long time after laminated films fully cured. The adhesive has a long storage time after mixing, and is easy to handle and easy to clean; the adhesive does not affect the PE film slip agent precipitation, thereby having excellent smoothness, widely used in laminating of various treated films, foil and metalized films, PET/AL and PET/VMPET in particular.
Standards
OCHEM SF9220A/SF9220B 2-component solvent-free polyurethane adhesive are in compliance with the positive lists of the following, internationally accepted guidelines for the production of articles intended to come into indirect contact with food stuff.
- EU RoHS directive (EU) 2015/863 amending Annex II to directive 2011/65/EU
- CFR, title 21, § 175.105 of the FDA, Washington D.C., respectively
- CFR, title 21, § 177.1390 of the FDA, Washington D.C., respectively
- CFR, title 21, § 177.1395 of the FDA, Washington D.C., respectively
- Regulation (EC) No 1907/2006 concerning the REACH
- GB9685-2016 hygienic standard for additive use of food containers and packaging material
- GB15193.1-2003 procedures for toxicological assessment on food safety
- GB/T10004-2008 plastic laminated film for packaging, bag dry lamination, extrusion lamination
Technical Properties
Item | SF9220A | SF9220B |
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℃) | 4500±500cps | 1800±500cps |
Mix Ratio in Weight (KGS) | 100 | 65~75 |
Mix Ratio in Volume (CBM) | 100 | 66.1~76.3 |
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 Excellent Resistance: resistant of 121℃/40min film/film retort and high slip agent or additives in thick PE film
l Economical coating: coating weight on non-retort packaging ( 1.2~2.5g/m2)
l Widely application: widely used in laminating of various treated films, foil and metalized films, PET/AL/BOPA and PET/VMPET in particular.
Coating weight and mix ratio
Structures | Coating weight | Mix Ratio (Weight) |
Non printed：BOPP/CPP，BOPP/PE，PET/PE，NY/PE,PET/CPP | 1.2-1.4 g/ m2 | 100 :70 |
Printed：BOPP/PE，BOPP/CPP，PET/PE，PET/CPP | 1.6~1.8g/ m2 | |
Water boiling resistant: NY/PE，PET/CPP | 1.8~2.2 g/ m2 | |
VMPET/PE，VMPET/CPP BOPP/VMPET | 1.8~2.2 g/ m2 | 100:75 |
BOPP/VMCPP，BOPP/VMPET, PET/VMPET, PET/VMCPP | 1.8~2.2 g/ m2 | |
PET/ALU, PET/PA, PET/PET | 2.0-2.2 g/ m2 | 100:65 |
121℃ retort pack :PA//RCPP, PET/RCPP | 1.8-2.5 g/ m2 | 100:68 |
Caution: When the ambient humidity is greater than 70% or less than 20%, it is recommended to adjust the ratio. Please contact our technical personnel before adjustment.
Laminating Temperature:
please find following different recommended operating temperatures in different processing sections
Item | Temperature ℃ | Remark |
SF9220A | 45~50 ℃ | When the temperature is low in winter, the temperature can be appropriately increased |
SF9220B | 40~45 ℃ | |
Feeding Tube | 45 ℃ | 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 | 45~50 ℃ | |
Meter Roller | 40~45 ℃ | |
Nip Roller | 35~45 ℃ | |
Curing Chamber | 40~45 ℃ | |
Curing time | ＞48 hours | Boiling resistant structure: ＞48 hours Retort resistant structure: ＞72 hours pouches or zip pack demand extra 6~12 hours |
Caution: When the ambient temperature is lower than 15℃, the glue should be preheated in advance and poured into the adhesive cylinder to reach the set temperature before use.
Performance Index
SF9200A/SF9200B (mixed by weight of 100:65~75) 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
Pack in steel barrel normally.
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, especially when laminating it with metalized film, aluminum oxide, aluminum foil structure, 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.