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Resource Library

Film Glossary

A quick reference for the film types, properties, and converting terms used in flexible packaging.

A

Adhesion

The physical bonding of two surfaces. In film, it refers to the strength of bond between the substrate and inks, adhesives, or coatings.

Anti-Fog

A chemical treatment that prevents water droplets from forming on the surface of the film, ensuring product visibility.

B

Biaxial Orientation

The process of stretching film in both machine and transverse directions to improve strength, clarity, and barrier performance.

BOPP

Biaxially oriented polypropylene, widely used for high-clarity packaging with strong moisture barrier performance.

C

Cast PP (CPP)

A non-oriented polypropylene film valued for softness, clarity, and strong seal performance.

Corona Treatment

A surface treatment process that raises surface energy so inks, coatings, and adhesives can bond properly.

G

Gauge

A measurement of film thickness, commonly discussed in microns or mils depending on the application.

M

Machineability

The relative ease with which a film substrate travels through a specific packaging or converting machine.

MSI

A standard units of measure (1,000 square inches) used for pricing and inventorying flexible packaging film.

T

Tensile Strength

The maximum stress a film substrate can sustain before breaking or failing permanently under tension.

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