Omar Khalid
Plastic products are usually imprinted with a number inside a recycling symbol, which indicates the type of plastic used and not its recyclability. There are seven types of plastics, each with unique characteristics and applications. Type 1 plastic, or PET, is commonly used for food and drink packaging due to its ability to prevent oxygen from spoiling the product. Type 2, or HDPE, is widely accepted by recycling centres due to its ease of recycling and is used for milk jugs, shampoo bottles, and more. Type 3, PVC, is dubbed the poison plastic due to its toxic composition and is found in pipes and construction materials. Type 4, LDPE, is considered less toxic and is used for bread bags and clothing. Type 5, PP, is found in medicine bottles and straws but is rarely recycled. Type 6, PS, is used for disposable cups and containers but is difficult to recycle. Type 7 plastics are often made of multiple plastic types and are challenging to recycle. Understanding these plastic types helps inform recycling practices and environmental impact.
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What You'll Learn
Plastic #1 (PETE) is safe and commonly recycled
Plastic is one of the most widely used materials in the world, and it is also one of the most environmentally damaging. Recycling is one way to reduce plastic's environmental impact.
Plastic #1, or PETE (Polyethylene Terephthalate), is a commonly used and widely recycled plastic. It is a safe plastic that can be recycled in most places. PETE is a transparent, lightweight, and strong plastic with good barrier properties. It is often used for packaging beverages, food, and personal care products. It is also used for cooking oil containers, plastic peanut butter jars, and other food containers.
The recycling process for PETE is straightforward and requires less energy and produces fewer greenhouse gas emissions than creating new plastic. First, the plastic is collected, sorted, cleaned, and crushed into small pieces called "flakes." These flakes are then melted and formed into pellets, which can be used to create new products.
While PETE is generally safe, it is important to note that it should only be used once, as it has a porous structure that can absorb chemicals. Strong cleaning products can cause carcinogens to leach, and heating PETE can cause the toxic chemical antimony to leach.
It is important to check local guidelines, as not all recycling programs accept all types of plastic, and some plastics may require specialized handling.
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Plastic #2 (HDPE) is safe, commonly recycled, and resilient
Plastic #2, or High-Density Polyethylene (HDPE), is considered one of the safest forms of plastic. It is a common plastic found in kitchens, bathrooms, and children's playrooms. Its chemical resistance, strength, and durability make it useful for many household and industrial applications.
HDPE is widely recycled and can be used to make many different products. It is accepted at most recycling centers and is considered easy to recycle. It can be identified by the plastic number #2 symbol, with a 2 inside a triangle of chasing arrows. HDPE is used to make milk jugs, detergent and oil bottles, toys, and some plastic bags. It is also used for electrical insulation and automotive parts, such as fuel tanks and car body parts, due to its lightweight and easily moldable nature.
HDPE is a robust and resilient plastic that does not break down easily. It is resistant to sunlight, heating, and freezing, making it ideal for outdoor products such as picnic tables, plastic lumber, waste bins, park benches, and garden beds. It is also used for indoor products like flower pots, bathtubs, and children's toys, as it is considered safe and durable.
To recycle HDPE products, simply clean out any food residue and place them in your recycling bin. If you don't have curbside recycling, check for a nearby container deposit depot. While HDPE is considered safe, it is still important to minimize plastic use and opt for reusable alternatives when possible.
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Plastic #3 is unsafe and hard to recycle
Plastic products are often stamped with a resin code, which is a number between one and seven inside a small triangle made of arrows. This number indicates the type of plastic used for the product, and not all plastics are recyclable or even reusable.
Plastic #3, also known as PVC, is one of the plastic recycling codes that should be avoided or, at the very least, rarely used, especially with food and drinks. PVC plastic recycling is almost impractical because of different additives. It is a soft, flexible plastic, used for a huge array of household products, including plastic tubing, kids' toys, plastic trays, and furniture. However, PVC products cannot be recycled.
It is important to note that even if a plastic type can be recycled, it does not mean that your local municipality wants you to put it into your recycling bin for collection. Hard-to-recycle plastics, including Styrofoam, shrink wrap, and manufacturing scrap, require specialized handling.
To make better choices for your health and the environment, it is crucial to understand the potential harm associated with different types of plastics. All plastic products can leach toxic chemicals when heated or damaged, so it is recommended to transition to other materials like metal and glass whenever possible.
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Plastic #4 (LDPE) is safe but not eco-friendly
Plastic #4, also known as Low-Density Polyethylene (LDPE), is a type of thermoplastic made from petroleum. It is considered safe for food storage because it does not contain Bisphenol A (BPA) or phthalates, which are chemicals linked to health concerns. LDPE is also resistant to acids, bases, and oils. However, it is not as heat-resistant as other plastics and can leach chemicals when exposed to high temperatures, so it is best to avoid microwaving or heating food in LDPE containers.
LDPE is commonly used in a variety of everyday products, including plastic bags, squeeze bottles, plastic wrap, packaging materials, and wire and cable insulation. It is also used in the automotive industry for car panels due to its lightweight and easily moldable properties. LDPE is durable, flexible, and transparent, making it a useful material for packaging.
While LDPE is considered safe for use, it is not the most environmentally friendly option. LDPE is recyclable, but its recycling process is more complex compared to other plastics, and only a small percentage of LDPE plastic is actually recycled. Some local curbside recycling programs accept rigid LDPE bottles and containers, but many do not accept LDPE plastic bags. It is important to check with your local recycling program to ensure proper disposal.
To reduce the use of LDPE and plastic waste, it is recommended to minimize the consumption of plastic products overall. Reusable grocery bags, concentrated cleaners, and making your own sauces and condiments are some ways to reduce plastic waste. Additionally, old LDPE containers can be reused for food storage or other purposes instead of being discarded.
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Plastic #7 includes bioplastics and new plastics
Plastic products are often stamped with a resin code, which is a number between one and seven inside a small triangle made of arrows. Each number corresponds to a different type of plastic.
The #7 category also includes polycarbonate (PC), which contains highly dangerous BPA (Bisphenol A). This chemical can leach into food or drink products packaged in polycarbonate containers. BPA is a xenoestrogen, a known endocrine disruptor, and is linked to obesity, cancer, and endocrine problems in fetuses and children. Therefore, it is recommended to avoid products with the PC label.
Plastic #7 can be found on items such as baby bottles, sippy cups, water cooler bottles, and car parts. It is hard to recycle #7 plastic, and most factories do not accept it. Therefore, it is better to opt for recycling numbers 1, 2, 4, and 5, which are considered relatively safe.
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Frequently asked questions
The numbers 1-7 inside the chasing arrows triangle on plastic products indicate the type of plastic used for the product.
- Number 1 plastic, or PET/PETE, is one of the most commonly used plastics in consumer products, found in most water and pop bottles, and some packaging.
- Number 2 plastic, or HDPE, is the stiff plastic used to make milk jugs, detergent and oil bottles, toys, and some plastic bags.
- Number 3 plastic, or PVC, can be found in shower curtains, cleaner bottles, pipes, cooking oil bottles, window and door frames, floors, and clear food wrap.
- Number 4 plastic, or LDPE (Low-Density Polyethylene), is a thermoplastic and one of the oldest grades of polyethylene. It is used in bread bags, frozen food bags, and plastic shopping bags.
- Number 5 plastic, or PP, is a soft flexible plastic that is often used in caps, some yogurt containers, medicine bottles, straws, disposable cups, and food containers.
- Number 6 plastic, or PS, is polystyrene, an inexpensive, lightweight, and easily formed plastic with a wide variety of uses. It is often used in disposable cups, food containers, egg cartons, plastic cutlery, and foam packaging.
- Number 7 plastic is a miscellaneous category that includes bioplastics and items composed of multiple types of plastics. This category also includes polycarbonate (PC) plastics, which contain the harmful chemical BPA.
Numbers 1, 2, and 4 plastics are the most commonly recycled plastics and are accepted by most local recycling programs. Number 2 HDPE plastic is considered the safest due to its material resilience and safety in terms of not transmitting chemicals.
Number 3 PVC plastic should be avoided as much as possible because it contains toxic chemicals that can leach into food or drinks when heated, and it is difficult to recycle. Number 7 plastics should also be avoided because they may contain harmful chemicals such as BPA, and they are hard to recycle.
To reduce plastic consumption, it is recommended to refuse, reduce, reuse, and repair plastic products before considering recycling. When purchasing plastic products, choose plastic packaging made from recyclable materials, and opt for reusable alternatives whenever possible.
