Two-Component Solvent-Free Polyurethane Adhesive for PET/AL/RCPP Retort Pouch with 121C Steam Sterilization

Product Overview

Huitian 866A/866B is a two-component solvent-free polyurethane adhesive developed for flexible packaging lamination. It is recommended for the inner layer of PET/AL/RCPP and PET/AL/NY/RCPP steaming structures. The cured adhesive layer withstands steaming at 121C for 40 minutes and features excellent medium resistance, high bond strength and good inner layer smoothness.

Key Features

• 100% solids solvent-free system with moderate viscosity and excellent wettability
• Withstands retort steaming at 121C for 40 minutes
• High bond strength with good medium (oil, acid, alkali) resistance
• Translucent, elastic and anti-aging adhesive layer after curing
• Does not affect the openability of the inner layer of laminated film
• Meets water boiling and steaming performance requirements

Applications

• PET/AL/RCPP and NY/RCPP lamination structures
• PET/AL/NY/RCPP retort pouch structures
• PET/VMPET/PET/PE high-barrier flexible packaging
• Food and pharmaceutical retort packaging lamination

Typical Technical Parameters

Directions for Use & Precautions

• Mix 866A and 866B at the standard mass ratio of 100:80 in an automatic glue mixer before use.
• Set glue mixing and coating temperatures according to the typical use parameters in the TDS; adjust to actual conditions.
• Films must receive corona treatment to achieve appropriate surface tension before lamination.
• Full process verification is required for outer high-barrier structures such as PET/AL and PET/VMPET.
• Seal containers immediately after opening to avoid moisture absorption and bubble formation.
• Install an effective exhaust hood on the coating system and monitor isocyanate content in the air.
• Store in a cool dry place away from direct sunlight; perform lamination trials before mass production.

FAQ