EPOXY and BPANI are two types of lining materials that are commonly used to coat metal cans to protect the contents from contamination by the metal. While they serve a similar purpose, there are some key differences between the two types of lining material.
EPOXY Lining:

• Made from synthetic polymer material
• Excellent chemical resistance, including resistance to acids and bases
• Good adhesion to metal surface
• Resistant to oxygen, carbon dioxide, and other gases
• Appropriate for use in acidic and low-to-mid-range pH food products
• Low odor and taste retention
• Lower overall cost compared to BPANI lining
• Has a shorter shelf life compared to BPANI lining.

BPANI Lining:

• Made from a Bisphenol-A non-intent material
• Offers excellent protection against the migration of harmful substances such as BPA
• Excellent acid resistance and suitable for use in high-acid foods
• Higher resistance to high temperatures
• Excellent resistance to moisture and oxygen barriers
• Higher overall cost compared to EPOXY lining
• Longer shelf life compared to EPOXY lining.

In summary, EPOXY lining is a cost-efficient option with excellent chemical resistance in mid-pH food products. Meanwhile, BPANI lining provides high resistance to acid and high-temperature products, with a longer shelf life, and offers superior migration protection. The choice between the two types of lining largely depends on the specific product being packaged and its requirements.