We all use plastic every day. It wraps our food, packages our parcels, makes up our tech, and even shows up in our clothes. But when it comes to recycling plastic, things can get confusing. Can this go in the bin? What does that triangle symbol mean? And what about black plastic?
In this guide, we break down the different types of plastics, what their recycling codes mean, and which ones are better for the environment.
Why Different Types of Plastic Matter
Plastic isn’t one single material. It’s a category of materials made from synthetic or semi-synthetic compounds — and not all plastics behave the same way.
Some:
- Melt and remould easily (thermoplastics)
- Are tough and inflexible (thermosets)
- Contain additives like dyes, flame retardants, or softeners
Because of these differences, not all plastics can be recycled — even if they look similar.
Understanding Plastic Recycling Codes
You’ve probably seen the little triangle with a number inside on packaging. This is a Resin Identification Code (RIC) — a way to identify the type of plastic.
There are 7 main types of plastic. Let’s explore them one by one:
1. PET or PETE (Polyethylene Terephthalate)
Used in:
- Water and soft drink bottles
- Ready-meal trays
- Cooking oil containers
Recyclable? ✅
Yes. One of the most widely recycled plastics. Usually turned into:
- New bottles
- Fleece clothing
- Food trays
Eco note: Try to rinse before recycling — food residue can cause contamination.
2. HDPE (High-Density Polyethylene)
Used in:
- Milk bottles
- Shampoo bottles
- Detergent containers
- Toys
Recyclable? ✅
Yes. Also widely accepted in kerbside recycling. Transformed into:
- Pipes
- Plastic lumber
- New bottles
Eco note: HDPE is durable and often reused — a good plastic choice.
3. PVC (Polyvinyl Chloride)
Used in:
- Window frames
- Pipes
- Cling film
- Some food packaging
Recyclable? 🚫
Rarely. Difficult to recycle and contains toxic additives.
Eco note: Avoid where possible. Choose safer alternatives like glass or HDPE.
4. LDPE (Low-Density Polyethylene)
Used in:
- Plastic bags
- Bread bags
- Squeezy bottles
- Bin liners
Recyclable? ♻️
Sometimes. Not usually accepted in kerbside bins but can be recycled at:
- Supermarket drop-off points (e.g. for carrier bags)
Eco note: Lightweight but often ends up as litter or ocean plastic.
5. PP (Polypropylene)
Used in:
- Yogurt pots
- Butter tubs
- Bottle caps
- Straws
Recyclable? ♻️
Increasingly accepted, especially for containers and pots.
Eco note: Heat-resistant and ideal for reuse — but double-check your local recycling policy.
6. PS (Polystyrene)
Used in:
- Disposable cutlery
- Takeaway boxes
- Packaging peanuts
- Foam trays
Recyclable? 🚫
Difficult and uneconomical to recycle. Also a known pollutant and possible carcinogen.
Eco note: Best avoided. Look for biodegradable or paper alternatives.
7. OTHER (Mixed or Unknown Plastics)
Used in:
- Multi-layer packaging (e.g. crisp bags)
- DVDs
- Nylon
- Bioplastics
Recyclable? 🚫
Usually not. Often ends up in landfill or incineration.
Eco note: This is the “everything else” category — always the least sustainable.
Quick Recap: Plastics You Can Recycle
| Code | Plastic Type | Recyclable? | Notes |
|---|---|---|---|
| 1 | PET | ✅ Yes | Most common in bottles |
| 2 | HDPE | ✅ Yes | Rigid containers |
| 5 | PP | ♻️ Sometimes | Yogurt pots, growing in acceptability |
| 4 | LDPE | ♻️ Sometimes | Drop-off at supermarkets |
Why Are Some Plastics Not Recycled?
Several reasons:
- Contamination: Food, oil, or chemicals
- Low market demand: Not cost-effective to recycle
- Composite materials: Hard to separate
- Toxicity: Harmful additives prevent safe reuse
What About Biodegradable and Compostable Plastics?
These are not part of the standard recycling system.
- Biodegradable plastics break down over time but may still release microplastics.
- Compostable plastics require industrial composting — not a home compost bin.
Always check the label and dispose of them in the right way.
Tips for Reducing Plastic Waste
- ✅ Choose products with minimal or no plastic packaging
- ✅ Bring your own bags, cups, and containers
- ✅ Avoid single-use plastics like straws and cutlery
- ✅ Learn your local council’s recycling rules
- ✅ Support brands using recycled or alternative materials
Final Thoughts
Plastic is everywhere — but not all plastics are created equal.
Understanding the types of plastic helps you make better choices as a consumer and recycler. Look out for the resin codes, learn what’s recyclable, and avoid plastics that can’t be reused.
Every decision — every bottle, bag, or tray — adds up. Let’s choose wisely.