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Two-pieces Paperboard Aluminum foil Induction seal liner BP-320T

Product introduction

The BP-320 is a premium two-piece induction seal liner designed for tamper-evident packaging and superior product protection. This 2-in-1 construction combines a paperboard backing with an aluminum foil sealing layer, creating a reliable hermetic seal that extends shelf life, prevents leaks, and provides clear tamper evidence.

During induction sealing, the aluminum foil layer generates heat through electromagnetic induction, bonding securely to the container mouth. The paperboard backing separates and remains inside the cap, serving as a resealable liner for repeated use after opening. This design is widely adopted in pharmaceutical, food, cosmetic, and chemical industries for its balance of security and consumer convenience.
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Features and characteristics

·         ✅ Tamper-Evident – Clear visual indication if the seal has been broken

·         ✅ Two-Piece Design – Paperboard stays in cap for reseal after foil is removed

·         ✅ Hermetic Seal – Prevents leakage, moisture ingress, and oxygen transmission

·         ✅ Clean Peel Option – No residue left on container mouth

·         ✅ Custom Printable – Aluminum foil surface accepts logos and branding

·         ✅ Extended Shelf Life – Protects product freshness and integrity

Detailed introduction

Layer Structure Diagram

 

Paperboard Layer

(0.5mm/0.9mm thickness)

← Stays in cap for reseal, printable surface

Wax Release Layer

← Allows clean separation during induction

Aluminum Foil Layer

(20µm thickness)

← Generates heat via induction, provides barrier

Heat Seal Coating

← Bonds to container mouth (resin-specific)