VINNAPAS® EP 749
VINNAPAS® EP 749 is a low Tg, medium-viscosity, low formaldehyde vinyl acetate ethylene copolymer dispersion. VINNAPAS® EP 749 exhibits good machinability and strong wet tack. It does provide good adhesion to films such as polyvinyl chloride, UV ink and coatings. It also has very high plasticizer / solvent viscosity thickening responses.
- Excellent adhesion to various plastic surfaces and UV coatings and ink
- Permanently flexible adhesive joints
- balanced adhesion and cohesion
VINNAPAS® EP 749 is chemically stable at both high and low pH. It is compatible with an assortment of resins, solvents, plasticizers and other modifiers as well as the other VINNAPAS® EP dispersions.
This product can be used to bond difficult to bond substrates without adding plasticizer, solvent or other additives.
Typical application fields of VINNAPAS® EP 749 are as follows:
• to bond paper or paper board with UV coatings or ink
• Envelop and Bookbinding
• PVC lamination and OPP wet lamination
• Paper Packaging for difficult-to-bond substrates.
Wird das Produkt in anderen Anwendungen als den aufgeführten Anwendungen eingesetzt, liegen Auswahl, Verarbeitung und Verwendung des Produktes in der alleinigen Verantwortung des Abnehmers. Dabei sind alle gesetzlichen und sonstigen Regelungen zu berücksichtigen.
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When the dispersion is stored in tanks, proper storage conditions must be maintained. VINNAPAS® EP 749 has shelf life of 9 months if stored in the original, unopened containers at temperatures between 5 and 30 °C. Please refer to "Best use before date" on the packaging label. Storage beyond the date specified does not mean that the product can't be used anymore, but the user should perform a quality check on the properties necessary for the intended application.
Iron or galvanized-iron equipment and containers are not recommended because the dispersion is slightly acidic. Corrosion may result in discoloration of the dispersion or its blends when further processed. Therefore the use of containers and equipment made of ceramics, rubberized or enameled materials, appropriately finished stainless steel, or plastic (e.g. rigid PVC, polyethylene or polyester resins) is recommended.
As polymer dispersion may tend to superficial film formation, skins or lumps may form during storage or transportation. Filtration is therefore recommended to utilization prior of the product.
Preservation for Transport, Storage and further Processing
VINNAPAS® EP 749 is adequately preserved during transportation and storage if kept in the original, unopened containers. However, if it is transferred to storage tanks, the dispersion should be protected against microbial attack by adding a suitable preservative package.
Measures should also be taken to ensure cleanliness of the tanks and pipes. In unstirred tanks, a layer of preservative-containing water should be sprayed onto the surface of the dispersion to prevent the formation of unwanted skin and possible attack by microorganisms. The thickness of this water layer should be < 5 mm for low viscosity dispersions and up to 10-20 mm for high viscosity products. Proper procedures - periodic tank cleaning and sanitization - must be set up in order to prevent microbial attack. Contact your biocide representative/supplier for further plant hygiene recommendations. Measures should be taken to ensure that only clean air enters the tank when the dispersion is removed.
Finished products manufactured from polymer dispersions usually also require preservation. The type and scope of preservation will depend on the raw materials used and anticipated sources of contamination. The compatibility with other components and the efficacy of the preservative should always be tested in the respective formulation. Preservative manufacturers will be able to advise you about the type and dosage of preservative required.
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