THIS IS DU PONT "ELVAXV.
Coatings based on "Elvax" heat-seal to allfilmsused in packaging today. Adhesive strength of wax extended with 40% "Elvax" is shown by fiber-tearing bond obtained when paper coated with "Elvax" is heat-sealed to polyethylene. This feature makes "Elvax" ideal for such applications as affixing end labels on polyethylene bread wrappers. 22
C&EN
a new vinyl resin wax extender of superior adhesion and toughness... now available in commercial quantities '"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. "Elvax" is now available in commercial quantities for your use or evaluation. With "Elvax" you can, for the first time, control the water-vapor transmission rate (WVTR) of wax coatings simply by varying the ratio of "Elvax" to wax. When 30% "Elvax" is blended with wax, flexible 1-mil coatings with flat and crease WVTRs of 0.2-0.4 gms./lOO in. 2/24 hours are obtainable. (In addition, resistance to grease penetration is improved significantly.) Flexible, tough adhesive bonds are obtainable using "Elvax" alone or blending it with waxes, resins, rosins or rosin derivatives. Hot-melt, solvent and pressure-sensitive adhesives based on "Elvax" adhere tightly to all films used in packaging. For example, bread end labels, such as the one shown at the left, can be securely affixed to polyethylene bread wraps with low-cost, hot-melt adhesives based on "Elvax". This is just one of the many product improvements made possible by new Du Pont "Elvax". Other applications include: improved coatings for frozen-food overwraps, waxed glassine, waxed cartons . . . wher-, ever low-cost, heat-sealable coatings with excellent water-barrier properties are required. Perhaps you, too, can utilize "Elvax" to good advantage . . . get greater versatility in packaging and an improved product. Why not evaluate it for yourself... now! Write for our booklet and technical information on "Elvax", describing properties, methods of application and possible uses. Du Pont, Electrochemical Dept., RoomD-2061, Wilmington 98, Delaware. Translucent, free-flowing pellets of "Elvax" vinyl resins are packed in easy-to-handle 50-pound multiwall bags. You can order "Elvax" now in commercial or evaluation quantities.
®
REG. U.S. PAT.OFF-
BETTER THINGS FOR BETTER LIVING . ,
ELVAX VINYL
RESINS C & E N 23
