Chloe Zhang
Plastic salad containers are often not recyclable due to the unique production process that makes the plastic more brittle and harder to reuse. This type of plastic is known as Polyethylene-terephthalate, or PET, and is labelled with the #1 symbol, which is usually accepted by recycling programs. However, the specific production process for salad containers results in a lower-grade form of PET that is often considered a contaminant. Additionally, the shape and size of the plastic lids can be mistaken for paper or cardboard by recycling machinery, further complicating the recyclability of these containers. While some places do accept these containers, it is important for consumers to properly clean and prepare them for recycling to minimize contamination.
| Characteristics | Values |
|---|---|
| Are plastic salad containers recyclable? | Yes, but the process is more complicated than for other plastics. |
| Why are they hard to recycle? | Plastic salad containers have undergone a molding process that makes the plastic more brittle, harder to reuse, and less valuable as a raw material. |
| What is the molding process? | Thermoforming, which produces a different grade of PET (Polyethylene-terephthalate) than the one used in plastic bottles and jugs. |
| Why does the grade of PET matter? | PET that has undergone thermoforming is considered a contaminant and has little to no market value. |
| What about biodegradable options? | Polylactic acid (PLA) containers are technically biodegradable but require industrial facilities for processing, which are lacking in many places. |
| Are there any recycling programs that accept plastic salad containers? | Yes, some programs like Ridwell offer convenient pickups for plastic clamshell containers in select cities. |
| What can be done to improve recyclability? | Companies like Organicgirl are working to identify gaps in the recyclability of their clamshell packaging and explore better packaging options. |
| What can consumers do? | Consumers can wash and dry plastic clamshells, remove any labels or adhesives, and place them directly in the recycling bin. |
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What You'll Learn
Plastic salad containers are often not recycled
Another challenge with recycling plastic salad containers is their shape and size. The lids for these containers can be mistaken by recycling machinery for paper or cardboard, leading to contamination issues. Additionally, the containers themselves have different bulk density and more fine particles when processed compared to other plastics, further complicating the recycling process. The adhesives used on the labels of plastic salad containers can also be difficult to remove, creating additional contamination issues.
The recycling process for plastic salad containers is more complicated and costly compared to other plastics. Recycling facilities are set up primarily to recycle bottles, not clamshell containers. As a result, clamshells are often viewed as garbage by recyclers, who would rather not pay for receiving them as they know they will either have to manually separate them or compromise their quality standards. The light weight of flattened clamshells also makes them difficult to sort from other materials once they reach the recycling facility, even with advanced sorting machinery and a large number of employees.
While some companies have explored using biodegradable Polyactic Acid (PLA) bioplastic containers, the lack of industrial composting facilities in countries like the United States makes it challenging to reliably process a large volume of this material. This highlights the gap between the recyclability of certain materials and the infrastructure available to support their recycling. Overall, these factors contribute to the low recycling rates for plastic salad containers, with a significant portion of plastic worldwide ending up in landfills or incinerated instead of being recycled.
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The molding process makes containers harder to reuse
Plastic salad containers are often not recyclable due to the molding process they undergo, which makes the plastic more brittle and harder to reuse. This molding process, called thermoforming, creates a different grade of plastic compared to other commonly recycled plastics like bottles and jugs, which typically undergo blow molding. The thermoforming process results in a type of plastic called Polyethylene Terephthalate (PET), which is considered a contaminant by recyclers and often has little to no market value.
The challenge with recycling PET is that it requires manual separation from other types of plastic, increasing labor and costs for recycling centers. PET is also more brittle than other plastics, making it harder to reuse and less valuable as a raw material. This is especially true for clear plastic salad containers, which are often made from recycled plastic bottles but are more challenging to recycle due to the molding process.
The molding process used to create plastic salad containers results in a material with different physical properties compared to other plastics. For example, plastic salad containers melt at a different temperature than plastic bottles and break into different-sized chips, making it challenging to create a uniform, high-quality recycled product when mixed with other plastics. The adhesives used on the labels of plastic salad containers can also complicate the recycling process, as they are difficult to remove.
To address the issue of non-recyclable plastic salad containers, some companies are exploring alternative packaging options. For example, Organicgirl introduced a biodegradable Polyactic Acid (PLA) bioplastic container, but later switched to a recycled PET clamshell package due to a lack of industrial composting facilities in the United States. They are now working with their packaging provider to identify ways to improve the recyclability of their clamshells and are also exploring new labeling options to reduce adhesive and paper contamination.
While it is technically possible to recycle plastic salad containers, the process is more complicated and less economically viable than recycling other types of plastic. As a result, many recycling centers choose not to accept these containers to avoid contamination, increased labor, and costs. However, there are a handful of places that do accept plastic salad containers, despite their limited value, and individuals can also take steps to recycle them properly by removing labels and placing them directly in recycling bins without bagging them.
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Plastic lids are often mistaken for paper or cardboard
Plastic salad containers are often not recyclable, and one of the main reasons for this is the plastic lids. These lids are often mistaken for paper or cardboard due to their shape and size, causing issues for recycling technology. Machinery struggles to differentiate between these lids and paper or cardboard, resulting in contamination. Consequently, even recycling centers that accept salad tubs usually refuse the lids.
The issue of plastic lids being misidentified as paper or cardboard is a significant challenge in the recycling process. This problem arises from the unique characteristics of the lids, which have distinct shapes and sizes that resemble paper or cardboard products to the machinery used in recycling facilities. The consequences of this confusion are far-reaching, impacting both the efficiency of recycling operations and the overall environmental impact of plastic waste.
The shape and size of plastic lids play a crucial role in their recyclability. Their flat, thin, and often round or rectangular shapes can be quite similar to certain types of paper or cardboard items, such as sheets of paper, cardboard boxes, or envelopes. This similarity in appearance can trick recycling machinery into misidentifying the material, leading to incorrect sorting and potential contamination of the recycling stream.
Additionally, the size of these lids can also contribute to the problem. Smaller lids, in particular, can be similar in dimensions to pieces of paper or cardboard. When these lids enter the recycling stream, their size may cause them to slip through sorting mechanisms or be overlooked by optical sensors, resulting in their incorrect classification.
To address this issue, some recycling centers have implemented manual sorting processes to separate plastic lids from paper and cardboard items. However, this additional step requires more time, labor, and resources, increasing the overall cost of recycling. As a result, some recycling centers choose to reject plastic lids altogether, rather than incurring the additional expenses associated with manual sorting.
Furthermore, the confusion caused by plastic lids can have environmental repercussions. When plastic lids are mistakenly recycled as paper or cardboard, they can contaminate the recycled paper stream. This contamination can lead to issues during the papermaking process, resulting in reduced paper quality or even the need to discard the entire batch of recycled paper. Ultimately, this can defeat the purpose of recycling and contribute to the waste of valuable resources.
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Industrial composting facilities are lacking
Plastic salad containers are notoriously difficult to recycle. While some recycling programs do accept them, the majority of recycling centres do not. This is due to the specific type of plastic used in their manufacture and the processes required to recycle them.
Salad containers are typically made from Polyethylene-terephthalate (PET) using a process called thermoforming. This process results in a more brittle plastic that is harder to reuse and less valuable as a raw material. The plastic is also more lightweight and less dense than other types of PET, which makes it harder to sort once it reaches the recycling facility. Even facilities with advanced sorting machinery struggle to differentiate between the different types of plastic at high volumes and fast speeds.
The different types of PET need to be separated manually by staff at recycling centres, which is time-consuming and costly. As a result, many recycling centres view clamshells as garbage and would rather not pay to receive them. PET that has undergone thermoforming is often considered a contaminant with little to no market value. This means that even if salad containers are accepted by a recycling centre, they are likely to be sent to landfill or incinerated rather than being recycled.
An alternative to PET salad containers is polylactic acid (PLA) containers, which are made from materials such as corn, bamboo, and sugarcane. These containers are technically biodegradable, but in practice, they also need to be processed at industrial composting facilities, which are currently lacking. A 2019 report found that out of approximately 4,000 composting facilities in the US, only 53 accepted BPI-certified compostable bioplastic products. This highlights the lack of infrastructure for processing biodegradable materials, even when products are marketed as compostable or biodegradable, there may not be a facility that can actually process them.
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Plastic bottles are more desirable for recycling facilities
Plastic salad containers are notoriously difficult to recycle. While some recycling programs do accept them, they are incompatible with most recycling systems. This is due to the unique molding process used to create these containers, which makes the plastic more brittle and harder to reuse. This type of plastic is also less valuable as a raw material, and often considered a contaminant.
Plastic bottles, on the other hand, are more desirable for recycling facilities. Firstly, most recycling centers are set up primarily to recycle bottles, not clamshells. Bottles are typically made using a process called blow molding, which results in a different grade of plastic compared to the thermoforming process used for salad containers. This grade of plastic is more valuable and has a wider range of uses.
Secondly, the different processes result in plastics with different densities, melting points, and chip sizes. This means that bottles and clamshells need to be separated to be recycled properly. If they are mixed, the recycled material may not be high-quality. As such, recycling centers that accept both bottles and clamshells often prefer to receive bottles, or only accept a small number of clamshells to avoid compromising the quality of the end product.
Additionally, plastic lids for tubs, often used for salads, can be mistaken for paper or cardboard due to their shape and size. This further complicates the recycling process, as even centers that accept the tubs may not accept the lids. Labels on containers can also cause issues, as the strong adhesives used can be hard to remove, leading to paper contamination.
Finally, recycling plastic bottles reduces energy consumption and carbon dioxide emissions during production. For example, recycling one pound of 5 oz. organic girl salad containers, or 8.60 containers of 1.86 ounces each, reduces power consumption by approximately 3.35 kilowatt-hours, eliminates about one pound of CO2 emissions, and saves almost 2.5 gallons of water. Therefore, it is clear that plastic bottles are more desirable for recycling facilities, while plastic salad containers face several challenges in the recycling process.
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Frequently asked questions
Plastic salad containers are technically recyclable, but they are often not accepted by recycling centers. This is because they are made with Polyethylene terephthalate (PET) that has undergone thermoforming, a process that makes the plastic more brittle and harder to reuse.
Plastic salad containers are not desirable to recycling centers because they are harder to recycle than other plastics. They have to be separated from other plastics, which is difficult due to their light weight and similar appearance to other plastics. They also have different bulk density and more fine particles when processed, which can result in a lower-quality end product.
The lids of plastic salad containers are often not accepted by recycling centers, even if the centers take the tubs. This is because the lids are often mistaken by machinery for paper or cardboard due to their shape and size.
One alternative to recycling plastic salad containers is to reuse them by growing your own microgreens at home. You can also look for salad containers made from Polylactic acid (PLA), which is a biodegradable material made from corn, bamboo, and sugarcane. However, it can be difficult to find facilities that process this type of plastic.
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