Product description: VINNAPAS® EP1400 is a poly(vinyl alcohol) stabilized vinyl acetate-ethylene copolymer dispersion with a glass transition temperature (Tg) of 0 °C. It was developed as a high performance, cost competitive base polymer dispersion for formulating a variety of water borne adhesives to replace:- Plasticized vinyl-acetate homopolymer packaging adhesives
- High wet tack, low solids poly(vinyl alcohol) or dextrin/starch based adhesives
- Conventional non-contact extrusion applied adhesive systems
Properties: VINNAPAS® EP1400 is a base polymer dispersion for formulating water borne adhesives. It has an excellent balance of wet tack, speed of set, adhesion, and heat resistance. It is compatible with a wide variety of formulating additives. It has a high thickening response to plasticizer. The dried adhesive bonds are resistant to water exposure. The low solids provides a long open time with good wet tack. The low Tg of the dried film provides excellent cold temperature flexibility. This dispersion offers clean machining, easy clean up and is suitable for a variety of roll, extruder, and spray applications. VINNAPAS® EP1400 can be formulated into adhesive systems designed especially for noncontact extrusion machine applications. No formaldehyde or formaldehyde donors are intentionally added to VINNAPAS® EP1400. The dry film is tack-free and heat-sealable. The backbone of the polymer is internally flexibilized to give the dried adhesive film high tensile strength and flexibility. This allows adhesives to be formulated that continue to perform with fluctuations in temperature and humidity. This dispersion has excellent heat resistance which, is much greater than that exhibited by other plasticized vinyl acetate, vinyl acetatemaleate and vinyl acetate-acrylate copolymers with similar glass transition temperatures. The adhesive strength is excellent after aging, and it exhibits excellent resistance to plasticizer migration.Application: VINNAPAS® EP1400 can be used to bond a variety of substrates including but not limited to coated and uncoated paper, cellulose acetate, polystyrene, poly(vinyl chloride) (PVC), and poly(vinylidene chloride). It is recommended for use in high-speed packaging and converting applications where rapid setting speeds, good machining and easy-clean up properties are required. The long open time helps to prevent premature drying under conditions of prolonged exposure to air especially on large diameter applicator rolls and non contact extrusion nozzles. The level of ethylene in the polymer acts as an internal plasticizer which provides flexibility and reduces or eliminates the need for plasticizer in many applications. Due to the low Tg, VINNAPAS® EP1400 continues to form a film at low temperatures and can be used in the laminating of cold substrates while still maintaining adhesion and heat resistance. Information provided by Wacker Chemie AG. |
