Chloe Zhang
Plastic #6, also known as polystyrene, is a type of plastic identified by a #6 PS symbol and is commonly used in foam products like Styrofoam and some hard plastics like disposable straws and flatware. It is also often found in takeaway food packaging. Plastic #6 is considered harmful to human and environmental health and is not widely recycled due to its challenging nature. However, specialist recyclers do exist and can process this type of plastic. When looking for plastic containers, it is important to consider safer alternatives to plastic #6 due to the potential health and environmental risks associated with it.
| Characteristics | Values |
|---|---|
| Type of Plastic | Polystyrene (PS) or Styrofoam |
| Identification | Number 6 in chasing arrows or triangle |
| Common Uses | Food containers, takeaway food packaging, foam packaging, disposable straws, flatware, CD cases, toys, insulation |
| Recyclability | Possible but challenging due to contamination and high costs; specialist recyclers may accept it; some areas ban its use |
| Health and Environmental Concerns | Carcinogenic, causes cell changes in humans, can cause asthma and hormone disruption |
| Safer Alternatives | Biodegradable packing peanuts, Woolcool (made from waste wool) |
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What You'll Learn
Polystyrene (PS) is plastic no. 6
Polystyrene, otherwise known as Plastic No. 6 or PS, is a thermoplastic polymer that can be solid or foamed. It is lightweight, rigid, versatile, and inexpensive. It is widely used in different industries and products, including food containers (foam cups, plates, and takeout boxes), packaging materials (foam peanuts, protective packaging, and egg cartons), CD and DVD cases, medical supplies (petri dishes, test tubes, and other lab equipment), and insulation materials (expanded polystyrene foam for construction insulation).
Polystyrene is one of the most common plastics available and can be identified by the number 6 inside the recycling symbol (a triangle of chasing pointers). It is often recognised as white foam blocks in packaging or packing peanuts, as well as in takeaway food packaging. It is also used in items like insulation, CD cases, and toys.
Polystyrene is made from the monomer styrene, which is derived from oil. These monomers are polymerized to form polystyrene. It was invented in 1839 by a German apothecary named Eduard Simon, who accidentally created polystyrene while preparing a medication.
Polystyrene is challenging to recycle and is not typically accepted in curbside recycling programs due to the difficulty in separating it from other materials. However, it can be recycled through specialist recyclers, who usually only accept clean, white polystyrene that is free from tape, plastic film, labels, loose parts, or glued-on cardboard. It should be broken or cut into small pieces to facilitate recycling.
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PS is hard to recycle
Plastic no. 6, also known as PS or polystyrene, is one of the most widely used plastics in the world. It is commonly recognised as the white foam blocks in packaging or packing peanuts, and is also used in takeaway food packaging.
Despite these challenges, some companies specialise in recycling PS and turning it into new products. There are also mail-in and drop-off programs that allow people to send in their PS waste for recycling. Although PS recycling is less common than some other types of plastic, it offers significant benefits such as reducing plastic waste and conserving natural resources.
To recycle PS, it is important to first break it into reasonably sized pieces and bag them up to prevent dispersion. Then, one can look up a local specialist recycler and drop off the material.
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PS is identified by #6 PS symbol
Polystyrene is a versatile plastic that is most easily recognised as the white foam blocks in packaging or packing peanuts. It is also commonly used in takeaway food packaging. Polystyrene is identified as Plastic No. 6 and features a "6" inside a triangle of chasing arrows.
Polystyrene is one of the plastic recycling codes that should be avoided or, at the very least, reused, as it is challenging to recycle. It is not accepted by all curbside recycling programs due to the challenges of managing it. Polystyrene can contaminate other recycling materials, and it is costly to transport to specialist recyclers.
Despite these challenges, polystyrene can be recycled, and some communities have drop-off programs where foam waste can be taken for recycling. It is important to reduce the use of polystyrene due to its harmful impact on the environment and human health. Polystyrene is made from styrene, which is derived from oil, and it is lightweight, rigid, versatile, and inexpensive.
To identify polystyrene, look for the #6 "PS" symbol on plastic products. This includes all foam products like Styrofoam and some hard plastics like disposable straws and flatware.
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PS is used in food packaging
Polystyrene (PS) is a versatile plastic that is commonly used in food packaging. It is identified as Plastic Number 6 and is often found in foam packaging or food containers. PS is a lightweight, hard plastic without much flexibility, and it can be made into foam or cast into moulds with fine detail. This makes it ideal for food packaging applications such as cups, trays, containers, lids, and egg cartons. PS is also suitable for form-fill-seal applications, especially in dairy packaging, due to its rigidity and processability.
One of the benefits of using PS in food packaging is its ease of processing. It is a very easy material to work with in thermoforming and form-fill-seal processes. The rigidity of PS provides key functionality such as snap-ability and score-ability, which are required for form-fill-seal packaging applications. PS also offers good environmental stress crack resistance (ESCR), making it reliable for packaging fatty foods. Additionally, PS supports various printing processes and decoration methods, allowing for customisation and unique designs for branding.
However, there are some concerns regarding the use of PS in food packaging. PS is not the best option when it comes to moisture vapour transmission compared to other polymers. It also poses significant environmental risks due to its long decomposition time and the release of harmful chemicals into the soil and water. These concerns have led many companies to explore alternative materials, such as biodegradable and compostable options, to reduce the environmental impact of food packaging.
While PS is approved by the U.S. Food and Drug Administration (FDA) for food contact, it is important to note that it should be avoided or at least reused when it comes to recycling. PS is challenging to recycle through curbside programs because it is difficult to separate and can contaminate other recycling materials. Instead, it is recommended to collect and reuse Number 6 plastic or utilise specialist recyclers who can process it separately.
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PS is banned by the Green Dining Alliance
Plastic is everywhere. From our homes to the oceans, we are surrounded by it. Over 300 million tons of plastic are produced annually, with more plastic produced in the last decade than in the entire 20th century. This has resulted in millions of tons of greenhouse gas emissions and harmful chemicals being released into the soil and groundwater. With over 100,000 marine animals and 1 million birds dying each year from ingesting plastic, it is clear that plastic pollution is a pressing issue.
Polystyrene, identified as plastic no. 6 or PS, is one such plastic that is prevalent in our lives. It is easily recognized as the white foam blocks in packaging or takeaway food containers. PS is also used in items like insulation, CD cases, and even some toys. Due to its widespread use and the environmental concerns associated with plastic pollution, the Green Dining Alliance (GDA), a year-round program of the 501c3 nonprofit organization earthday365, has banned the use of PS by its member restaurants.
The GDA's Core Concepts, which restaurants must adhere to in order to become members, include banning all polystyrene products. This includes all foam products like Styrofoam and some hard plastics like disposable straws and flatware. PS is rarely recycled, and even when it is accepted by local recycling haulers, it is often not recoverable. Curbside recycling programs usually don't allow polystyrene because it's challenging to manage and can contaminate other recycling materials.
While polystyrene is cheap and lightweight, making it popular for shipping, the GDA and the city of New York have recognized the environmental impact of this plastic and taken steps to reduce its use. It is important to note that while recycling PS is challenging, it is possible through specialist recyclers. However, to minimize the environmental impact of PS, it is preferable to collect and reuse it or opt for biodegradable alternatives.
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Frequently asked questions
6 plastic, also known as polystyrene, is a type of plastic identified by a #6 "PS" symbol. It is commonly used in foam products like Styrofoam and some hard plastics like disposable straws and CD cases.
6 plastic is considered harmful to human and environmental health. Petroleum-based products like plastic are considered carcinogenic, meaning they can cause cancer when ingested by humans.
Although it is possible to recycle 6 plastic, it is not widely practiced. Curbside recycling programs usually do not accept polystyrene because it is challenging to manage and can contaminate other recycling materials.
Instead of using 6 plastic, look for biodegradable alternatives such as packing peanuts made from wool or other compostable materials. For food packaging, consider using glass containers, which are safer for both health and the environment.
Some examples of 6-inch plastic containers include storage bins, totes, and boxes made from rugged, commercial-grade material. These containers are often used for protecting outdoor accessories from the elements or storing oversized items like Christmas decorations.
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