PET?

PET — Polyethylene Terephthalate — is a semi-crystalline polyester film. In the label trade, it is the strongest, most heat-resistant, most chemically inert face stock in routine production. Where BOPP is the bottle wrap of choice, PET is the answer for cosmetics, electronics, automotive, and anything that needs to survive a dishwasher or a Saudi summer.

PET is also the same polymer that makes water bottles — though the film form is different, more refined, and engineered for adhesive lamination.

Molten PET is extruded as an amorphous sheet, biaxially stretched (similar to BOPP), then heat-set at high temperature to crystallise the polymer. The resulting film has exceptional dimensional stability — it will not creep, shrink, or distort under normal-use conditions.

PET is typically coated with a UV-curable top-coat for printability. It accepts UV inkjet, eco-solvent, hot-foil and screen printing without surface treatment. For dishwasher- and outdoor-grade durability, pair it with a UV-cured ink or a full-resin thermal-transfer ribbon.

Premium cosmetics — serum bottles, perfume, scientific skincare. PET’s temperature range and chemical inertness mean it survives essential oils, alcohol-based toners, and the bathroom shelf for years.

Electronics labels — serial numbers, certification marks, asset tags. PET’s heat tolerance handles soldering proximity; its dimensional stability handles thermal cycling.

Mirror, metallic, brushed finishes — PET is the substrate for nearly all metallised label looks. The vapour-deposited aluminium layer is bonded to the underside of clear PET.

Long-life outdoor — trail markers, equipment tags, marine. PET resists UV degradation longer than BOPP or vinyl.

PET is noticeably more expensive than BOPP or vinyl — expect to pay roughly 40–80% more at comparable thicknesses. For most non-premium bottle work, BOPP is the right answer.

PET is stiffer — it does not wrap around very tight curves as well as vinyl. For complex compound curves, vinyl conforms better.

PET needs the right print build for full durability — a UV-cured ink or full-resin thermal-transfer ribbon. Plain inkjet and laser prints on PET will smear or fade in extended use. Specify the printing method when sourcing.