EU Bans Bisphenol a in Food Contact Materials Forcing Supplier Shifts
Buyers must audit packaging suppliers to identify Bisphenol A in coatings before the transition deadline arrives.
Can Coatings
Barrier Formulation
Protective polymeric layers applied to metal container interiors shield food and beverage contents from interaction with raw aluminum or steel substrates. Industrial can coatings prevent chemical corrosion, organic degradation, and metal leaching into packaged consumable goods. Standard epoxy resin systems have historically dominated this field due to high adhesion properties, though bisphenol-free alternatives like acrylics and polyester formulations now occupy substantial market share.
The chemical makeup depends directly on the acidity, alcohol concentration, and processing temperature of the stored product.
Application Process
Liquid resin systems pass through high-speed spray nozzles or roller coaters before undergoing thermal curing in inline industrial ovens. During can coatings application, uniform film thickness prevents micro-pinholes that lead to structural perforation during transport or shelf storage. Thermal crosslinking forms a tight matrix capable of surviving mechanical drawing, necking, and flanging steps without cracking or delaminating.
Variations in viscosity or curing temperature produce surface defects that compromise container integrity. Precise temperature monitoring ensures complete solvent evaporation and chemical polymerization across the substrate surface.
Regulatory Limit
Maximum migration thresholds established by international food safety agencies govern the chemical leaching allowed into contact substances. Modern can coatings must comply with global migration limits verified through standardized extraction tests using food simulants. Trace monomer residues face strict analytical scrutiny under European and North American administrative standards.
Failure to meet chemical compliance guidelines halts batch distribution and forces re-formulation across production lines.