Materials

EVOH: what buyers should know.

A practical buyer’s guide to EVOH in flexible packaging.

Direct answer

EVOH is an ethylene vinyl alcohol copolymer used as an oxygen-barrier layer in many coextruded or laminated packaging structures. Its barrier is sensitive to moisture, so it is normally evaluated as part of a protected multilayer construction rather than as a standalone answer.
Buyer topicoxygen barrier
Tradeoff to discussmoisture sensitivity
Common contextprotected layer
Printed rollstock web leaving a wound roll
Buyer diagramBuyer diagram: evoh: what buyers should know.

A resin name is not a package specification

EVOH may be one layer, coating, or component in a larger construction. Gauge, treatment, orientation, additives, adjacent layers, adhesive, print position, and sealant can change how the finished package behaves.

Ask for the performance target

Instead of starting with a favorite material, define what the package has to do: run on the line, seal through expected conditions, protect the product, survive distribution, present the brand, and meet applicable requirements.

Separate education from manufacturing approval

This page explains common industry terminology. It does not prescribe a structure or certify a material for a food, vacuum, frozen, recyclable, compostable, or other specific application.

Buyer questions

Questions worth settling before the quote.

Can Matt help source EVOH?

Matt can help organize the commercial and technical questions around EVOH. Any specific grade, construction, availability, performance, or application still needs manufacturer and buyer review.

Can a film structure be identified from a photo?

No. Appearance may suggest possibilities, but it cannot establish every layer, coating, adhesive, treatment, or gauge. Use specifications, supplier documentation, or appropriate analysis.

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