What Is Plastic Packaging Called?

Ask five people along a packaging supply chain what a clear plastic pack is called and you will get five different answers. The tooling engineer calls it a mold. The printer calls it a substrate. The buyer calls it a blister. The freight forwarder writes "plastic articles for conveyance or packing" on the paperwork and moves on.

Plastic packaging simply carries several layers of names, because people name things by the material in front of them, by the shape they see, or by the job the pack has to do. 

Names That Come From the Material

The most common way the industry names plastic packaging is by resin, and the resin names you will see quoted most often are PET, PVC, PP, PS, HDPE and rPET.

Names That Come From the Material

The most common way the industry names plastic packaging is by resin, and the resin names you will see quoted most often are PET, PVC, PP, PS, HDPE and rPET.

PET, sometimes written PETE, is the clear, strong resin behind most transparent retail boxes, tubes, jars and blisters. It is resin code 1 and the most recycled plastic in the world. PVC, resin code 3, is also clear and usually cheaper, but it is softer, which is why it turns up in folding clear boxes and sleeves where the pack has to crease without cracking. PP, code 5, is the workhorse for hinges, closures, food containers and anything that needs to sit in a dishwasher or a microwave. PS, code 6, gives you foam and thin trays but is brittle, so it is rarely chosen for anything a customer will reopen. HDPE, code 2, is the opaque, tough resin of bottles and drums.

Then there is rPET, recycled PET, which is now a qualification requirement rather than a nice-to-have for many European and North American retail programs. When a specification says "minimum 50% recycled content," rPET is the material it is asking about. Names such as PCR, post-consumer recycled, and bio-based or compostable resins like PLA belong to the same conversation, and they mean different things: recycled content, feedstock origin and end-of-life behavior are three separate claims that are easy to blur together in a marketing paragraph and expensive to blur together in a compliance file.

Names That Come From the Shape

The second naming layer is structural, and this is where the vocabulary gets colourful.

A blister is a formed plastic cavity sealed to a printed card or film, the classic way to sell small hardware, batteries or cosmetics. A clamshell is a pack of two formed halves joined by a hinge, closing on itself without any card. The name comes from the way it opens, like a shell. A skin pack shrinks a film tight over a product mounted on a board, and a thermoformed tray is a shallow formed insert that holds items in place. Beyond those, you will run into clear folding boxes, tubes, jars, pouches, sachets, shrink sleeves and stand-up pouches, each with its own tooling, print method and unit cost.

The broad structural split that buyers find most useful is between rigid and flexible. Rigid plastic packaging holds its shape on its own: boxes, tubes, trays, blisters, clamshells, jars. Flexible plastic packaging deforms: films, bags, pouches, wraps, labels. The two behave differently in logistics, in shelf display and in the recycling stream, so a spec that names only "plastic packaging" leaves a supplier guessing between genuinely different factories.

Names Used in Retail and Merchandising

Retail language adds its own set of words. Store buyers ask for visible packaging, window packaging, display boxes and clear boxes, and they care how a pack hangs, stands or stacks rather than which resin it uses. That is why the same item can be a "PET box" to the factory and a "display pack with a euro slot" to the retail team. Hang tabs, euro slots, inserts and printed backing cards are features, not materials, and they are usually the details that decide whether a product sells from a shelf or a pegboard.

"Plastic packaging" will get you a general catalog. "Custom plastic packaging: 0.5 mm rPET thermoformed clamshell with a printed insert card, hinged, food-contact grade" will get you a mould review, a unit price and a sample schedule. The same logic applies on a purchase order, in a brief to a design studio or in a message to a new supplier. Name the material so the tooling is right, name the structure so the machine is right, and name the function so the compliance paperwork is right.