FDA 175.105 Compliant Polyurethane Laminating Adhesive with Fast Peel Strength Build-Up and Slip Agent Compatibility

Product Overview

Weeton 776A/776B is a two-component polyurethane adhesive specially suited for aluminum foil lamination structures. It demonstrates excellent positioning force and rapid peel strength build-up on foil, combined with high compatibility with slip agents for thick wPE films, good heat resistance and chemical resistance.

Key Features

• Excellent positioning force on aluminum foil substrates
• Fast peel strength build-up for early slitting and converting
• High compatibility with slip agents; ideal for wPE (>=80um)
• Good heat resistance and chemical resistance
• Excellent solvent release and good wetting
• Very high initial tack for line stability
• FDA 175.105 compliant

Applications

• Aluminum foil lamination structures (AL/PE etc.)
• OPP/PE and NY/(w)PE with thick PE films
• Boiling-grade film/film flexible packaging
• Structures requiring fast converting turnaround

Typical Technical Parameters

Directions for Use & Precautions

• Dilute with ethyl acetate, acetone or MEK (water below 300 ppm); never use aromatic or alcoholic solvents.
• Stir 776B into the diluted 776A mixture after reaching the required solid content.
• Use within 24 hours of preparation; max 2 hours retention in the machine.
• In tropical conditions (above 28C, humidity above 60%) use within 2 hours.
• Use gradient oven temperatures (55-85C) to eliminate residual solvents.
• Increase lamination temperature and pressure for better bond strength and surface finish on foil.
• Follow isocyanate safety regulations and install exhaust hood on the coating unit.

FAQ