MateriumPlastics · Material reference
PET: properties and identification clues
A practical reference to polyethylene terephthalate: common uses, resin code 1 and the distinction between bottles and polyester fabrics.
Read as Markdown ↗PET stands for polyethylene terephthalate. It appears in drinks bottles, food packaging and polyester fibres. The polymer name describes a material family; the way it is processed determines the form and properties of the finished item.
| Full name | Polyethylene terephthalate |
|---|---|
| Packaging resin code | 1 — PET or PETE |
| Common examples | Drinks bottles and some food packaging |
What to look for
For a bottle, photograph the base markings, body and cap separately. Clear packaging provides useful visual context, but transparency alone does not distinguish PET from every other clear plastic.
Make a useful comparison
Compare PET with HDPE by recording the product type and moulded resin marking. A bottle and its closure can use different polymers, so examine each part as its own material. PET fabric is also a useful reminder that a shared polymer does not mean a shared disposal route.
Explore it with Materium
Explore a clean drinks bottle with Materium, then look for PET, PETE or a resin code on the packaging. Save the marking with your reference notes to connect visual observations with the manufacturer’s material declaration.
Materium brings visible patterns, finish and object context into an AI-assisted assessment. Learn how the analysis works. These references provide supporting reading, separate from the app’s generated report.
Care, reuse and recycling context
Use the on-pack instructions and local collection guidance for the specific item. A resin code identifies the polymer; it does not by itself establish that a tray, bottle or textile is accepted in the same collection.
Related materials
Keep learning
Sources and further reading
Sources checked 2026-10-19. Industry and manufacturer references are labelled; collection guidance applies to the stated location.
- British Plastics Federation — thermoplastic polyesters (industry reference)
- Recycle Now — packaging symbols and local collection (UK)
Educational content prepared with AI assistance. Editorial and corrections policy.