Other Lessons in This Course
- Types of Plastic
- Types of Plastic
- Guide to Materials: Polypropylene, Polyester, and Nylon
- Differences Between Pill and No-Pill Fleece
- 50/50 vs. 100% Cotton T-Shirts
- What is Neoprene?
- Different Types of Lead
- BPA Promotional Products
- What is Proposition 65?
- Ounces in Garments
- What Materials Are Used for Koozies?
- Do Stress Balls Work?
- Different Types of Inks and Their Uses
- Different Types of Pens and Their Uses
- Different Types of Tote Bag Materials
- What Are the Different Types of Mugs?
- What Are the Different Types of Adhesives?
Plastic is an essential component of many items, including water bottles, combs, and beverage containers. Knowing the difference, as well as the SPI codes, will help you make more informed decisions about recycling.
The seven types of plastic include:
- Polyethylene Terephthalate (PETE or PET)
- High-Density Polyethylene (HDPE)
- Polyvinyl Chloride (PVC)
- Low-Density Polyethylene (LDPE)
- Polypropylene (PP)
- Polystyrene or Styrofoam (PS)
- Miscellaneous plastics (includes: polycarbonate, polylactide, acrylic, acrylonitrile butadiene, styrene, fiberglass, and nylon)
When it comes to promotional giveaways, and even items we use around the house, there is no material more important than plastic. The same can be said for the items we use at the office. Most of our supplies contain at least a little bit of this material. In fact, humans have thus far produced 9.1 billion tons of plastic!
For the sake of the environment, it’s important to know the different types of plastic and their uses, as well as the resin identification codes found on each.
Recycling Codes for Plastic
Understanding the different types of plastic can help consumers like you make more informed decisions related to your health and the environment. It’s important to become familiar with an item’s SPI (Society of the Plastics Industry) code, which is also known as a resin identification number and is used to classify the different types of plastic. This information will help you sort plastic materials more effectively for recycling.
See a full breakdown of each kind of plastic, along with its associated SPI resin code!
#1 - PETE or PET - recyclable
#2 - HDPE - recyclable
#3 - PVC - recyclable, but call your recycler
#4 - LDPE - recyclable, but call your recycler
#5 - PP - not recyclable
#6 - PS - not recyclable
#7 - Other plastics like nylon and styrene - not recyclable
SPI Code 1
Recycling Number: 1
Abbreviation: PETE or PET
Polymer Name: Polyethylene Terephthalate
Uses: Soda bottles, Water bottles, Salad dressing bottles, Medicine jars, Peanut butter jars, Jelly jars, Combs, Bean bags, Rope, Tote bags, Carpet, Fiberfill material in winter clothing
Repurposed to Make: textiles, carpets, pillow stuffing, life jackets, storage containers, clothing, boat sails, auto parts, sleeping bags, shoes, luggage, winter coats
SPI Code 2
Recycling Number: 2
Polymer Name: High-Density Polyethylene
Uses: Milk jugs, Juice containers, Grocery bags, Trash bags, Motor oil container, Shampoo and conditioner bottles, Soap bottles, Detergent containers, Bleach containers, Toys
Repurposed to Make: Plastic crates, lumber, fencing
SPI Code 3
Recycling Number: 3
Polymer Name: Polyvinyl Chloride
Uses: Some tote bags, Plumbing pipes, Grocery bags, Tile, Cling films, Shoes, Gutters, Window frames, Ducts, Sewage pipes
Repurposed to Make: Flooring, mobile home skirting
Recyclable: Yes - but call your recycler
SPI Code 4
Recycling Number: 4
Polymer Name: Low-Density Polyethylene
Uses: Cling wrap, Sandwich bags, Squeezable bottles for condiments such as honey and mustard, Grocery bags, Frozen food bags, Flexible container lids
Repurposed to Make: Garbage cans, lumber
Recyclable: Yes - but call your recycler
SPI Code 5
Recycling Number: 5
Polymer Name: Polypropylene
Uses: Plastic diapers, Tupperware, Kitchenware, Margarine tubs, Yogurt containers, Prescription bottles, Stadium cups, Bottle caps, Take-out containers, Disposable cups and plates
Repurposed to Make: Ice scrapers, rakes, battery cables
SPI Code 6
Recycling Number: 6
Polymer Name: Polystyrene or Styrofoam
Uses: Disposable coffee cups, Plastic food boxes, Plastic cutlery, Packing foam, Packing peanuts
Repurposed to Make: Insulation, license plate frames, rulers
SPI Code 7
Recycling Number: 7
Polymer Name: Miscellaneous Plastics (polycarbonate, polyctide, acrylic, acrylonitrile butadiene, styrene, fiberglass, and nylon)
Uses: Plastic CDs and DVDs, Baby bottles, Large water bottles with multiple-gallon capacity, Medical storage containers, Eyeglasses, Exterior lighting fixtures
Repurposed to Make: Plastic lumber (which is often used in outdoor decks, molding, and park benches
|Recycling Number||Symbol||Abbreviation||Polymer Name||Uses||Repurposed to Make||Recyclable|
|1||PETE or PET||Polyethylene Terephthalate||
||textiles, carpets, pillow stuffing, life jackets, storage containers, clothing, boat sails, auto parts, sleeping bags, shoes, luggage, winter coats||Yes|
||Plastic crates, lumber, fencing||Yes|
||Flooring, mobile home skirting||Yes - but call your recycler|
||Garbage cans, lumber||Yes - but call your recycler|
||Ice scrapers, rakes, battery cables||No|
|6||PS||Polystyrene or Styrofoam||
||Insulation, license plate frames, rulers||No|
|7||N/A||Miscellaneous Plastics (polycarbonate, polyctide, acrylic, acrylonitrile butadiene, styrene, fiberglass, and nylon)||
||Plastic lumber (which is often used in outdoor decks, molding, and park benches||No|
What Are the Different Types of Plastic?
Take a walk through your house or office and you’re guaranteed to stumble across a variety of plastic products like water bottles and pens. No material is more commonly used in our everyday lives! It’s easy to classify everything as simply “plastic.” However, there are seven different types you should know about.
- 1) Polyetylene Terephthalate (PETE or PET)
- 2) High-Density Polyetylene (HDPE)
- 3) Polyvinyl Chloride (PVC)
- 4) Low-Density Polyetylene (LDPE)
- 5) Polypropylene (PP)
- 6) Polystyrene or Styrofoam (PS)
- 7) Miscellaneous Plastics (nylon, styrene, fiberglass, etc.)
1. Polyethylene Terephthalate (PETE or PET)
Introduced by J. Rex Whinfield and James T. Dickson in 1940, this plastic is one of the most commonly used on the planet. Interestingly enough, it took another 30 years before it was used for crystal-clear beverage bottles, such as the ones produced by Coca-Cola and Pepsi.
PETE plastics make up 96% of all plastic bottles and containers in the United States, yet only 25% of these products are recycled. By being mindful and making sure to recycle code 1 plastics, you’re helping to ensure a cleaner environment and less landfill pollution!
2. High-Density Polyethylene (HDPE)
In 1953, Karl Ziegler and Erhard Holzkamp used catalysts and low pressure to create high-density polyethylene. It was first used for pipes in storm sewers, drains, and culverts. Today, this plastic is used for a wide variety of products.
HDPE is the most commonly recycled plastic because it will not break under exposure to extreme heat or cold. According to the EPA, 12% of all HDPE products created are recycled in a year. This is a very small dent in the planet’s carbon footprint.
3. Polyvinyl Chloride (PVC)
PVC is one of the oldest synthetic materials in industrial production. It was actually discovered on accident twice; once in 1838 by French physicist Henri Victor Regnault and again in 1872 by German chemist Eugen Baumann. On both occasions, these men found it inside vinyl chloride flasks left exposed to sunlight.
PVC is one of the least recycled materials; generally less than 1% of PVC plastic is recycled each year. It has been called the "poison plastic" because it contains numerous toxins and is harmful to our health and the environment.
4. Low-Density Polyethylene (LDPE)
LDPE was the first polyethylene to be produced, making it the godfather of the material. It has less mass than HDPE, which is why it’s considered a separate material for recycling.
Packaging and containers made from LDPE make up about 56% of all plastic waste, 75% of which comes from residential households. Fortunately, many recycling programs are evolving to handle these products. This means less LDPE will end up in landfills and negatively affect the environment!
5. Polypropylene (PP)
J. Paul Hogan and Robert L. Banks of Phillips Petroleum Company discovered polypropylene in 1951. At the time, they were simply trying to convert propylene into gasoline, but instead discovered a new catalytic process for making plastic.
Only about 3% of polypropylene products are recycled in the US, but interestingly enough, 325 million pounds of non-bottle plastics were collected for recycling over a year. In other words, a lot of this plastic is created, but only a small fraction is actually recycled.
6. Polystyrene or Styrofoam (PS)
In 1839, German apothecary Eduard Simon accidentally came across polystyrene while preparing medication. He isolated a substance from natural resin and didn’t realize what he had discovered. It took German chemist Hermann Staudinger to research this polymer and expand on its uses.
Since polystyrene is lightweight and easy to form into plastic materials, it also breaks effortlessly, making it more harmful to the environment. Beaches all over the world are littered with pieces of polystyrene, endangering the health of marine animals. Polystyrene accounts for about 35% of US landfill materials.
7. Miscellaneous Plastics
The remaining plastics include: polycarbonate, polylactide, acrylic, acrylonitrile butadiene, styrene, fiberglass, and nylon. Of course, there are many differences in the plastics classified as miscellaneous by recycling programs.
Many BPA products fall into this category, which means it’s best to avoid this plastic for food products. It is not very easy to break down these plastics once they are created, unless they are exposed to high temperatures. This makes these plastics nearly impossible to recycle.
What Are SPI Codes?
- 1) SPI Code 1 - PET or PETE
- 2) SPI Code 2 - HDPE
- 3) SPI Code 3 - PVC
- 4) SPI Code 4 - LDPE
- 5) SPI Code 5 - PP
- 6) SPI Code 6 - PS
- 7) SPI Code 7 - Miscellaneous
In 1988, the Society of the Plastics Industry (SPI) established a classification system to help people properly recycle and dispose of their plastics. Today, manufacturers follow this coding system and place a number, or SPI code, on each product, usually molded into the bottom.
SPI Code 1 Plastic marked with an SPI code 1 is made with polyethylene terephthalate. These containers sometimes absorb odors and flavors from foods and drinks that are stored inside them. However, this is still a commonly used plastic for many household items and daily essentials.
SPI Code 2 The SPI code 2 identifies plastic made with high-density polyethylene.These products are very safe and are not known to leach any chemicals into foods or drinks. Due to the risk of contamination, however, it’s not safe to reuse an HDPE bottle as a food or drink container if it didn’t originally contain some kind of edible substance. In other words, keep the shampoo bottles out of your kitchen cabinet!
SPI Code 3 Plastic labeled with an SPI code 3 is made with polyvinyl chloride. This kind of plastic should not come in contact with food items as it is a dangerous, toxic chemical. PVC is in many everyday objects, but it’s mostly for industrial use in the plumbing and construction sectors.
SPI Code 4 Plastic marked with an SPI code 4 is made with low-density polyethylene. This plastic tends to be both durable and flexible. It also does not release harmful chemicals into objects, making it a safe choice for food storage.
SPI Code 5 You’ll find SPI code 5 on plastic items made with polypropylene. PP can be recycled, but it's not as accepted as PETE or HDPE. This type of plastic is strong and can usually withstand higher temperatures. That’s why you’re able to reheat your leftovers in Tupperware without worrying about it melting!
SPI Code 6 Plastic marked with an SPI code 6 is made with polystyrene. PS can be recycled, but not efficiently; recycling it takes a lot of energy, which means that few places accept it. This is why it’s a good idea to invest in a reusable mug for your daily caffeine fix!
SPI Code 7 The SPI code 7 is used to designate miscellaneous types of plastic that are not defined by the other six codes. Think of these items as plastics, but ones that don’t conform to society’s rules by fitting into a specific SPI code.
Get to Know Your Plastic
What are the seven types of plastic? Why do they have different classifications? Scroll through some examples of each SPI Code in this exclusive gallery!
PET/SPI Code 1: Soda bottles and other beverage containers are often made with PETE plastic. This is an easy plastic to recycle and can be reused to create everything from storage containers to piggy banks.
HDPE/SPI Code 2: HDPE plastic isn’t considered toxic and is often used in food and drink containers. While you shouldn’t reuse these containers for food, they are repurposed to make crates and fences.
PVC/SPI Code 3: You are probably familiar with PVC for its industrial use in plumbing and construction. If recycled, this plastic can be reused to create flooring and the bottom of mobile homes.
LDPE/SPI Code 4: Take your weekly trip to the grocery store and you’ll come across low-density polyethylene in almost every aisle. This plastic can be used to make outdoor furniture like lawn chairs and patio tables.
PP/SPI Code 5: Polypropylene plastic can withstand high temperatures without melting. This plastic can be recycled to create seasonal favorites like rakes and ice scrapers.
PS/SPI Code 6: Unfortunately, it’s very difficult to recycle plastic made from Styrofoam. However, it has been repurposed for license plate frames and rulers.
SPI Code 7: All of the plastic that doesn’t fit elsewhere falls into this category. You’ll find this plastic reused to make plastic lumber, which is commonly found in outdoor decking.
Why Is This Important?
Recycling is an important way to ensure sustainability and a green planet for future generations. Being mindful with your plastics can make all the difference in the world to the health of the environment. In fact, for every ton of plastic that’s recycled, an estimated 7 yards of landfill space is saved. And with 80% of Americans having easy access to plastic recycling programs, there’s no excuse to be anything other than green!
While the plastic resin codes don’t necessarily indicate the toxins used in the plastics, they are useful for distinguishing between the different kinds of plastics. SPI codes for plastics help you better understand the products you’re using and how they affect your health and the environment. Informed consumers like you can demand that plastic manufacturers provide better products. So keep these plastic classification numbers in mind, and don't forget to put your newfound knowledge to use—always check a product's classification code prior to recycling it or re-using it. Every small step we take ensures a better tomorrow for our planet!
Alyssa is the Lead Copywriter at Quality Logo Products. She has a BA in English & Communications and has written for Counselor Magazine and The Bolingbrook Sun. If you need her, you’ll find her buried in research, in the middle of a phone interview, or singing way off-tune in her office.
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