Maya Ellison
Plastic wrap is a thin plastic film commonly used for sealing and securing food items in containers to keep them fresh. It is also used for industrial purposes, such as securing pallets. The weight of a plastic wrapper varies depending on its size and the type of plastic used. Polyvinyl chloride (PVC), a common material used in plastic wrap, is known for its light weight, with sheets ranging from 0.55 to 0.70 grams per cubic centimeter. Other types of plastic, such as polyethylene terephthalate (PETG) and low-density polyethylene (LDPE), may have different weights and densities. Concerns have been raised about the environmental impact of plastic waste and the potential release of chemicals from plastic into food products. Despite this, plastic wrap is widely used due to its convenience and protective properties.
| Characteristics | Values |
|---|---|
| Common materials | Polyvinyl chloride (PVC), Polyethylene terephthalate (PETG), Polyvinylidene chloride (PVDC), Low-density polyethylene (LDPE) |
| Thickness | 35-40 ga (store-bought) |
| Weight | Dependent on material and thickness. Sheets of PVC from 1-6mm thick are 0.70 grams per cubic centimeter, while sheets ranging from 10-25mm thick are 0.55 grams per cubic centimeter. |
| Applications | Food packaging, freezing food, luggage wrapping, medical applications, industrial applications |
| Environmental impact | Plastic debris can choke or trap wildlife, penetrate toxic compounds into ecosystems, and cause issues for marine life. Recycled plastic materials can reduce environmental impact. |
| Health impact | Health concerns due to the possibility of releasing undesirable chemicals into food products. |
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What You'll Learn
Plastic wrap's environmental impact
Plastic wrap is a cheap and convenient way to protect and preserve food. It can prevent food from perishing, extend its shelf life, and maintain its quality. However, plastic wrap has a significant environmental impact. It contributes to the larger plastic pollution crisis, threatening both wildlife and the environment. Plastic debris can choke or trap wildlife, and it can also release toxic compounds into ecosystems, including oceans, threatening aquatic life. The accumulation of plastic in the ocean is a result of plastic debris being carried by streams and rivers from the land to the coast, and then transferred by currents to other parts of the ocean.
Plastic wrap is difficult to recycle and often ends up in landfills or incinerators, where it can release highly toxic chemicals such as dioxin. Even when recycled, it is costlier than using virgin materials. Some plastic wrap materials, such as polyvinyl chloride (PVC) and polyvinylidene chloride (PVDC), are of particular concern due to their potential to release toxic chemicals into the environment and food. These materials are also good at picking up bacteria and metals, which can be harmful.
To address the environmental impact of plastic wrap, some companies have developed eco-friendly alternatives made from biodegradable and compostable materials, such as plant-based polymers like polylactic acid (PLA) and polyhydroxyalkanoates (PHA). These alternatives have a lower carbon footprint and are approved by food safety authorities, ensuring both consumer and environmental well-being. Recycled plastic materials can also reduce environmental impacts by minimizing the exploration, mining, and transportation of natural gas and oil.
While some advocate for ditching plastic wrap altogether, manufacturers argue that the main issue is the lack of infrastructure for collecting and recycling plastic waste. They believe that with the right infrastructure, plastic films could be easily recycled, reducing their environmental impact.
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Plastic wrap's health concerns
Plastic wrap is a generic term for thin-film polymers used to protect refrigerated food. It is widely used in the food industry due to its low price and convenience. However, there are growing health concerns about the use of plastic wrap, especially regarding the possibility of releasing undesirable chemicals from the plastic into food products.
One of the main concerns is the presence of phthalates in plastic wrap, which are chemicals used to increase the wrap's flexibility. Phthalates are considered toxic as they can disrupt hormones, and these compounds can leach into food wrapped in plastics made with them. Studies have linked phthalate exposure to allergies, asthma, and abnormal sperm quality in adult men. Additionally, a 2023 study found that children exposed to phthalates in the womb or during their first year of life were more likely to develop behavioural, attention, and learning disorders. Due to these concerns, almost all plastic wrap made in North America and the United States has been phthalate-free since 2006.
However, as a replacement, manufacturers introduced low-density polyethylene (LDPE), which contains diethylhexyl adipate (DEHA), another potential endocrine disruptor. Studies have shown that DEHA can migrate from plastic wrap into food, especially high-fat foods such as cheese, beef, chicken, and pork. DEHA has been linked to liver tumors in mice, and more recent studies indicate potential brain and heart injuries in rats. While the World Health Organization's International Agency for Research on Cancer concluded that there was insufficient evidence to label DEHA as carcinogenic, the chemical's presence in plastic wrap remains a concern for many consumers.
To address these health concerns, some companies have switched from using PVC to LDPE in their plastic wrap products, citing LDPE as a safer alternative for both the environment and human health. However, there are conflicting studies suggesting that LDPE might also pose risks to human health. As a result, consumers are advised to take precautions when using plastic wrap, such as avoiding direct contact with food, especially fatty meats or cheeses, and ensuring that food is cooled before wrapping.
Additionally, when using plastic wrap in microwave ovens, it is essential to follow the guidelines provided by health experts and regulatory agencies. The U.S. Food and Drug Administration (FDA) advises against using any plastic wrap that is not labelled "microwave-safe" in the microwave, as it may cause chemicals to leach into the food. Instead of plastic wrap, some alternatives recommended by health professionals include wax paper, white paper towels, and glass or ceramic containers for microwave use.
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Plastic wrap's weight and thickness
Plastic wrap is a thin plastic film commonly used for sealing and securing food items in containers to keep them fresh. It is also used for industrial purposes, such as securing pallets. The weight and thickness of plastic wrap depend on the type of plastic and the manufacturing process.
One of the most common types of plastic wrap is made from PVC (polyvinyl chloride or polyvinylidene chloride). PVC is known for its smooth matte finish and exceptional screw and staple retention. The density of PVC plastic wrap can vary depending on its thickness. For example, sheets of PVC ranging from 1 to 6 millimetres in thickness have a density of 0.70 grams per cubic centimetre, while sheets ranging from 10 to 25 millimetres in thickness have a slightly lower density of 0.55 grams per cubic centimetre.
Another popular type of plastic wrap is made from LDPE (low-density polyethylene). LDPE is considered safer for the body and the environment compared to PVC. However, LDPE plastic wrap does not provide the same level of cling as PVC. The thickness of LDPE plastic wrap can be adjusted during the manufacturing process by controlling the amount of air blown into the molten plastic tubes.
The weight and thickness of plastic wrap can also be affected by the addition of additives and coatings. For example, lubricants, plasticizers, UV-absorbers, colourants, and antioxidants are commonly added to plastic materials to improve their quality and properties. These additives can increase the weight and thickness of the plastic wrap.
Overall, the weight and thickness of plastic wrap can vary depending on the type of plastic, the manufacturing process, and the additives used. Most store-bought plastic cling wrap has a thickness of 35 to 40 gauge, which is relatively thin compared to other types of plastic sheets.
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Plastic wrap's uses and applications
Plastic wrap is a thin plastic film typically used for sealing food items in containers to keep them fresh over a longer period. Plastic wrap is usually sold on rolls in boxes with a cutting edge and can cling to many smooth surfaces without the need for adhesive. The thickness of common plastic wrap is roughly 0.0005 inches (12.7 μm), although household plastic wrap tends to be thinner, with the majority of brands now being 8, 9 or 10 μm thick.
The most important role plastic wrap plays in food packaging is protection and preservation. Plastic wrap can prevent food from perishing, extend its shelf life, and maintain the quality of food. Plastic wrap generally provides protection for food from three aspects: chemical (gases, moisture, and light), biological (microorganisms, insects and animals), and physical (mechanical and radiations). Plastic wrap can also reduce food waste, tag food information, ease the distribution processes, and increase product visibility and microwavability.
Outside of the food industry, plastic wrap can be used to protect electronic parts from dust, secure goods during storage and shipping, and cover medical instruments, wounds, and medication packaging. In the automotive industry, plastic wrap can be used to protect car parts from dust, moisture, and other contaminants during shipping, storage, or manufacturing. It can also keep car parts and paint from being tainted. Plastic wrap is also used in the textile industry to keep fabric rolls and completed textiles safe from moisture, dust, and other contaminations during transportation or storage.
Different types of plastic wraps include stretch film, stretch wrap, shrink wrap, and hand stretch wraps. Stretch film is used around items to keep them tight, intact, and safe during transportation. It is often used for products kept on pallets and is also recyclable. Stretch wrap does not require heat, unlike shrink wrap, which is used to cover retail products.
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Plastic wrap's alternatives
Plastic wrap is incredibly convenient and widely used in the food industry due to its low price, protection, and preservation. However, plastic wrap contributes to global warming and the destruction of ecosystems, and health issues. Each year, an estimated 8 million tons of plastic waste end up in the oceans, entangling wildlife and breaking down into microplastics that are ingested by marine life.
Fortunately, there are several eco-friendly alternatives to plastic wrap that can help reduce plastic pollution:
Beeswax Wraps
Beeswax wraps are a popular alternative to plastic wrap. They are made from beeswax, tree resin, jojoba oil, and cotton. Beeswax wraps are biodegradable and can be washed and reused for up to a year. They are perfect for wrapping items like vegetables or cheese that need to stay fresh but may dry out or turn brown without a tight seal. However, beeswax wraps don't always create an airtight seal and should be washed in cold water as they cannot withstand high temperatures.
Silicone Food Bags and Covers
Silicone is a non-toxic polymer made primarily from silica (sand). It does not leach harmful chemicals into food, even when heated, making it a safe alternative to plastic. Silicone food bags and covers are self-sealing, airtight, and stretchy, allowing them to mould to the shape of bowls and containers of various sizes. They are also dishwasher, microwave, and freezer safe, making them a versatile and reusable option for food storage.
Glass Jars and Reusable Containers
Glass is 100% recyclable and does not degrade in quality over time. Glass jars are a great alternative to plastic wrap for storing soups, oatmeal, salads, and other food items. Reusable food containers can also be used instead of plastic wrap to store leftovers, lunches, and snacks, reducing the need for single-use plastic.
Bowl Covers
Reusable bowl covers made from laminated or untreated cotton are an eco-friendly alternative to plastic wrap. They come in various colours and sizes and are perfect for covering food in the refrigerator or taking meals on the go. They are easy to wash and can be stretched over bowls of different shapes and sizes.
By choosing reusable and eco-friendly alternatives to plastic wrap, individuals can play a vital role in reducing plastic waste and its harmful impact on the environment and wildlife.
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Frequently asked questions
Plastic wrap is a thin plastic film commonly used for sealing and securing food items in containers to keep them fresh.
The weight of a plastic wrapper depends on its material and thickness. Polyvinyl chloride (PVC) sheets, for example, can range from 0.55 grams per cubic centimeter to 0.70 grams per cubic centimeter in thickness. Other materials used for plastic wrap include polyethylene terephthalate (PETG) and low-density polyethylene (LDPE).
In addition to the type of material and its thickness, the weight of a plastic wrapper can also be influenced by additives and coatings. These additives, such as lubricants, plasticizers, UV absorbers, colorants, and antioxidants, are added to improve the quality and properties of the plastic.
The weight of plastic is typically measured in grams per cubic centimeter or specific gravity, which compares the density of an object to water.
Yes, there are significant environmental concerns associated with plastic wrappers due to the accumulation of plastic debris on the Earth, which threatens wildlife and ecosystems. Efforts have been made to increase the recycling rate of plastics and reduce their environmental impact.
