720A 720B Polyurethane Dry Lamination Adhesive with High Peeling Strength Tunnel Prevention and FDA 175.105 Compliance for Film Foil Laminates

Product Overview

Weeton 720A/720B is a two-component polyurethane adhesive for film/film and film/foil laminates delivering high peeling strength and good transparency. Its balanced rheology effectively prevents the tunnel phenomenon, ensuring a clean, uniform appearance in printed and unprinted flexible packaging.

Key Features

• Effectively prevents tunnel phenomenon in lamination
• High peeling strength for durable laminate bonds
• Good transparency for clear film applications
• High initial adhesion for immediate line stability
• FDA 175.105 compliant for food contact laminates
• Adjustable dilution (30-45% solid content) for process flexibility

Applications

• Transparent film/film lamination for clear pouches
• Film/foil laminates for barrier packaging
• Printed laminates requiring precise adhesive laydown
• Food packaging dry lamination lines

Typical Technical Parameters

Directions for Use & Precautions

• Dilute 720A with ethyl acetate (water below 300 ppm) before adding 720B.
• Never use aromatic or alcoholic solvents for dilution.
• Consume the ready-for-use adhesive within 8 hours; max 4 hours retention in the machine.
• In tropical conditions use within 2 hours to avoid unstable lamination.
• Add approximately 0.5-1 g/m2 more adhesive for printed films.
• Follow isocyanate handling regulations and install exhaust hood on the coating unit.

FAQ