Polyurethane adhesives do not contain Primary Aromatic Amines (PAAs). However, in specific circumstances and when the adhesive is not fully cured, they can be formed by a reaction. Consequently, the adhesive user has to be made aware of the potential formation of PAAs and their responsibility to ensure full curing of the adhesive layer.
FEICA updated its recommendation to adhesive suppliers and users on the assessment of PAAs in polyurethane adhesives intended to be used in food packaging. The recommendation includes advice to the downstream user as regards the limits to be respected for PAAs.
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