THIS IS DU PONT "ELVAXV..
" Ε LVAX" vinyl resins are translucent, free-flowing pellets that blend readily with wax to form strong, flexible coatings for a wide variety of packaging materials. "Elvax" blends are easy to apply by hot-roll, curtain or solvent-coating techniques. 16 C & Ε Ν
A NEW VINYL RESI THAT GIVES WAX GREATER VERSATILITY IN PACKAGING "Elvax" is a new, high-molecular-weight vinyl resin that makes possible low-cost wax coatings of superior adhesion, flexibility and toughness with excellent water-barrier properties. With "Elvax" you can, for the first time, con trol the water-vapor transmission rate (WVTR) of wax coatings simply by varying the ratio of "Elvax" to wax. As little as 5% of "Elvax" added to wax reduces the creased WVTR of unmodified wax coatings by '50% without im pairing the flat WVTR. In addition, resistance to grease penetration is improved significantly. When 40% "Elvax5' is blended with wax, flexi ble 1-mil coatings with flat and creased WVTRs of 0.2-0,4 gms. /100 in. 2/24 hours are obtainable. You can obtain tough, flexible adhesive bonds using "Elvax" alone or combining it with waxes, resins, rosins and rosin derivatives, "Elvax" exhibits strong adhesion because of the chemically active polar groups in its molecules. Flexibility and toughness (see upper right) result from its rubber-like, noncrystalline structure and . high molecular weight. Hot-melt, solvent and pressure-sensitive adhesives based on "Elvax" adhere tightly to all films used in packaging today (see right).
FLEXIBILITY is demonstrated by tying a strip of paraffin wax, Mended with 40% "Elvax", into a knot. When "Elvax" is added, the strip becomes plastic.will take 50% elongation before it breaks . . . is flexible at ~-20°F. •
Since "Elvax" will be used in food packaging applications, Du Pont is currently completing a nineteen-month study which will be used to petition the FDA for permission to use "Elvax" where contact with food is concerned. You can order "Elvax" now in commercial or evaluation quantities. Our new booklet on "Elvax" provides information on properties and application methods . . , suggests possible uses. Write: Du Pont, Electrochemicals Dept., Vinyl Products Division, Room N-2536, Wilmington 98, Delaware.
of wax extended with 40% "Elvax" is shown by thefiber-tearingbond obtained when paper coated with "Elvax"/wax is heat-sealed to poly ethylene. Coatings based on "Elvax" heat-seal to all films used in packaging today. ADHESIVE STRENGTH
"ELVAX"
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