Adhesives and Resins for Film Converting

A converter buys film, adhesive and ink and sells a structure that has to run on somebody else's filling line. That makes consistency more valuable than any single property: the same coat weight, the same bond, the same print, batch after batch.

Where the specification starts

With the end use. A retort pouch and a dry-snack bag can use the same films and still need different adhesives, because one sees steam at 121 °C and the other never sees water.

What a converter should ask a supplier

• Which grade for this structure, and why that grade rather than the next one down.
• Mix ratio, pot life and cure schedule in writing.
• Batch documentation and a certificate of analysis with the delivery.
• What changes if the line speed goes up, and what the limit is.

Those four answers separate a supplier who understands converting from one who is selling drums.