VINNAPAS® EP 705K (ULS)
VINNAPAS® EP 705K (ULS) is a PVOH-protected vinyl acetate-ethylene copolymer which viscosity is moderate and also produced without the use of formaldehyde donors. The backbone of the polymer itself gives the dried adhesive film both toughness and flexibility which persist even with water immersion and fluctuations in temperature.
- Good adhesion to various plastic surfaces
- Permanently flexible adhesive joints
- High cohesion
VINNAPAS® EP 705K (ULS) is chemically stable at both high and low pH. It is compatible with other polyvinyl acetate (PVAc) polymers, rubber lattices, EVCL dispersions and VINNAPAS® VAE dispersions. It is also compatible with an assortment of resins, solvents, plasticizers and other modifiers.
VINNAPAS® EP 705K (ULS) offers several advantages in packaging adhesive applications as well as lamination applications. VINNAPAS® EP 705K (ULS) bonds such widely diversified substrates as paper, wood, cotton cloth, nylon cloth, hardboard, urethane foam and certain types of coated paperboard. Typical application fields of VINNAPAS® EP 705K (ULS) are as follows:
- Packaging (window cartons and carton forming)
- Luggage and handbags
- Envelop and bookbinding
- Textiles or upholstery
- PVC lamination and OPP wet lamination
- Wood lamination and low cost veneering
- Cigarette tipping / seaming & packaging
VINNAPAS® EP 705K (ULS) has a good stability at high-speed machines and is suitable for roll, extruder or spray application.
If the product is used in applications other than those mentioned, the choice, processing and use of the product is the sole responsibility of the purchaser. All legal and other regulations must be complied with.
For questions concerning food contact status according the chapter 21 CFR (US FDA) and German BfR, please feel free to contact us.Wacker Chemie AG Hanns-Seidel-Platz 4 D-81737 München Germany
When the dispersion is stored in tanks, proper storage conditions must be maintained. VINNAPAS® EP 705K (ULS) has a shelf life of 9 months from the date of manufacture if stored in the original, unopened containers at temperatures between 5 and 40 °C. 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 resin) is recommended. As polymer dispersions may tend to superficial film formation, skins or lumps may be formed during storage or transportation. A filtration process is thus recommended prior to utilization of the product. If the product is stored for a longer period, stirring is recommended before use.
Preservation for Transport, Storage and further Processing
VINNAPAS® EP 705K (ULS) 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 the 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.