Heat Seal & Barrier Coatings

Demand is up for heat seal adhesives and barrier coatings on paper packaging: form-fill-seal, stand-up pouches, and single-use food packs. The point is source reduction. Less package weight, less waste, and a construction that can be coated instead of laminated to a film that will not repulp.

Why run them together

The hard part is barrier and heat seal without a multi-layer plastic stack (PE, EVOH, PET) that cannot be separated at end of life. The barrier coating holds out water, moisture vapor, oil, and grease. The heat seal coating is coated and dried now, and heat reactivates it to form the bond later, in-line or offline.

Water-based heat seal and barrier coatings can replace a thicker extruded polyolefin layer, often at a lower coat weight.

What to check

Paper usually needs a double bump so the film is continuous and pin-hole free. Grade and coat weight depend on smoothness, porosity, and holdout. Cobb, dye stain, oil/grease resistance, MVTR, and OTR are the checks. Heat seals are sensitive to substrate and sealing conditions.

Where they run

• Form-fill-seal and stand-up pouches
• Food and flexible packaging
• Yogurt lidding and blister packs
• Sugar and flour bags
• Fast-food carton board
• Protective wraps

Pick the line

Heat seal and barrier coatings FAQ

Running paper packaging that needs barrier and heat seal without the plastic stack? Each line has its own buyer FAQ: stock, coat weight, seal temp, and how to get a sample.

Heat seal adhesive FAQ · Barrier coatings FAQ · Call 800-249-0337 for a match.

Read before you run

Heat seal adhesives and barrier coatings for paper · How to select heat seal coatings for lidding · Sustainable barrier coatings for paper: moisture, OTR, oil, grease resistant · How to test for grease resistance using TAPPI UM 557 grease-kit solutions

Send board samples for a drawdown. Call 800-249-0337 for SDS, TDS, and activation temperature.

Call 800-249-0337 Request a sample