Envelope Gluing

Special glues have been developed for the production of envelopes. These cold glues based on dextrin (starch dissolved in water), gum arabic and synthetic dispersions can process all parts of the envelope to be glued, at the highest possible speeds. For example, the glue is suitable for gluing the bottom flap, the bottom and the longitudinal seam. Envelopes usually have a line of glue that seals the envelopes when moistened. This requires a rewetting adhesive, which is used for applying the lick layer. It is also possible that this is done by a contact glue or a self-adhesive glue strip. A special adhesive has also been developed for the application of windows (available in spray and wheel viscosity). Together with the quality, the type of paper and the speed of the envelope machine, optimum machine workability must be obtained. If necessary, Intercol can adapt the adhesives to your machine-specific wishes. The viscosity and percentage of solids are also important with this envelope glue. When using glue, it is necessary to perform an extensive test. This can partly take place in our house, but will also have to prove itself in production. Usually one of our technical people is present during an adhesive test, to support the settings and answer any questions from the TD and machine operators.

• rolling glue
• spray adhesives
• gum glues
• window glues
• psa hot melt