Building a Better Envelope

“The New Gum Gazette,” a free newsletter for envelope manufacturers from National Adhesives, Bridgewater, N.J., offers tips for improved envelope productivity and aesthetics. Topics include boosting tack with remoistening aids, showing how paper grain direction impacts adhesive performance, improving gum seal appearance and avoiding problems with “timed” or “drop seal” gumming methods.

The newsletter features a chart comparing the fiber-tear speeds of remoistening solutions supplied by major adhesives producers, a problem/solution chart for gum seal appearance and a graph illustrating how viscosity impacts gum box stability.

National Adhesives—a unit of National Starch and Chemical Company—provides hot-melt, liquid emulsion and solvent-borne solution adhesives worldwide. The company’s products are based on polyurethane, acrylic, rubber, ethylene vinyl acetate, epoxy and polyvinyl acetate, as well as starch and dextrin chemistries.

For more information, visit www.nationalstarch.com.