Omar Khalid
Coolers are used to keep food and drinks cool and are made from a variety of materials, including foam, plastic, metal, and fabric. The type of cooler you need depends on the occasion and your budget. If you're looking for a cooler for a one-day event, a small, soft-sided cooler will do the job. For longer periods, such as camping or boating trips, a large, hard-sided cooler is a better option. Hard plastic coolers are typically made from polyethylene, polyurethane foam, or elastomer. They are durable, affordable, and provide decent insulation and ice retention. However, some hard plastic coolers are made from cheaper materials and may not offer the same level of performance. If you're looking for a more durable and high-quality option, injection-molded or rotomolded coolers are worth considering. These coolers are made from one continuous piece of plastic and offer superior performance and features compared to their commonplace counterparts. Metal coolers are another option but tend to be heavier and less portable.
| Characteristics | Values |
|---|---|
| Common materials | Vinyl, cotton, polyester, canvas, neoprene, nylon, hard plastic, metal, fabric |
| Hard plastic types | Polyurethane foam, polyethylene, elastomer, high-density polyethylene (HDPE), injection-molded, rotomolded |
| Soft-sided coolers | More affordable, less durable, lower ice retention |
| Hard-sided coolers | More durable, better insulation, more expensive |
| Metal coolers | Durable, good insulation, heavy, less portable |
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What You'll Learn
Hard plastic coolers are made from a variety of plastics
Polyethylene is the most produced plastic globally, with over 80 million tons manufactured annually. It has a simple structure composed of only carbon and hydrogen. There are three types of polyethylene, each with a different density: high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), and low-density polyethylene (LDPE). HDPE is commonly used to produce plastic picnic coolers due to its advantages, including excellent electrical insulation, chemical resistance, toughness, and low price.
Elastomer is another polymer used in plastic coolers, but it also has an environmental impact. The production of elastomer involves the consumption of natural rubber from rubber trees, which can lead to the instability of the material and the possibility of depletion if consumption continues unchecked. Additionally, the processing of elastomer requires a large amount of fossil fuels, contributing to increased carbon dioxide emissions.
Hard plastic coolers made through injection molding or rotomolding are considered more durable and high-quality than those made through blow molding. Injection-molded and rotomolded coolers are extremely durable, can withstand heavy use, and offer superior insulation and ice retention capabilities. Rotomolded coolers are made from a continuous piece of plastic, making them waterproof and leakproof. They are less likely to crack or break at stress points, and their heavy-duty latches and hinges deter animals. Models made from UV-treated plastic can keep contents cold for extended periods, even when exposed to the sun.
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Polyurethane foam is a polymer used in plastic coolers
Plastic coolers are made from a variety of different polymers. One of the most commonly used polymers in plastic coolers is polyethylene. Polyethylene is the most-produced plastic in the world, with over 80 million tons being manufactured annually. It is composed of only carbon and hydrogen, and it offers excellent electrical insulation, chemical resistance, toughness, and low prices. High-density polyethylene (HDPE) is the type of polyethylene used in plastic coolers.
Another polymer used in plastic coolers is polyurethane foam, also known as PU foam. Polyurethane foam is a solid polymeric foam that is based on polyurethane chemistry. It is a synthetic material with highly diverse applications, but it is primarily used for thermal insulation and as a cushioning material. Its low density, thermal conductivity, and mechanical properties make it an excellent thermal and sound insulator, as well as a structural and comfort material. Polyurethane foam is made from polyesters and diisocyanatos, which are bi-products of crude oil. The hardness of the foam depends on the amount of molecular weight of the polyol used.
Polyurethane foam is used in refrigerator or freezer panels, and it is a cross-linked thermoset plastic that is highly resistant to heat. It can withstand temperatures of up to 750 degrees Fahrenheit (399 degrees Celsius) and has a surface ignition rating of 599 to 698 degrees Fahrenheit (315 to 370 degrees Celsius). Polyurethane foam is also used in the insulation cores of modern refrigeration units, where it offers 30 to 40 percent more insulation per given thickness over expanded polystyrene (EPS). The foam is injected instead of glued, and it provides moisture resistance to ensure the long-term performance of the insulation.
There are two main types of polyurethane foam: flexible (soft) and rigid (hard) foams. Flexible polyurethane foams have an open-cell structure with interconnected pores, while rigid polyurethane foams have a closed-cell structure with non-interconnected pores. Flexible polyurethane foam is often used in furniture, bedding, automotive seating, athletic equipment, packaging, footwear, and carpets. It is also used as an effective noise absorption material in acoustic insulation in various sectors, including construction and transportation. Rigid polyurethane foam is used in refrigeration panels and offers excellent insulation and heat resistance.
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Rotationally moulded (roto-moulded) coolers are popular
Plastic coolers are typically made from polyurethane foams, polyethylene, and elastomer. The outer shells of regular coolers are blow-moulded using polypropylene plastic, which is less durable than the polyurethane used in rotationally moulded (roto-moulded) coolers.
Roto-moulded coolers are popular because they are extremely durable, and their seamless shells can withstand an incredible amount of abuse. They are also superior in terms of insulation and ice retention, making them ideal for outdoor enthusiasts who need their food and drinks to stay cold for days in very hot temperatures. The rotational moulding process involves heating and rotating the plastic, which results in a consistent thickness all around the cooler. This even distribution of insulation ensures that each side is equally protected from external forces and temperatures, and your items stay equally cold no matter where they are placed inside the cooler.
Roto-moulded coolers are also more eco-friendly than other coolers as the manufacturing process is energy-efficient and does not release any dangerous toxins or chemicals into the air. Additionally, the thicker walls of roto-moulded coolers make them more resistant to cracking and other types of damage. The seamless shell also prevents dirt from building up, which is common in coolers with lines and crevices.
While roto-moulded coolers are more expensive than regular coolers, their superior performance, durability, and eco-friendliness make them a popular choice for those seeking a high-quality, long-lasting cooler.
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Metal coolers are lined with thin plastic
Metal coolers are possibly the least common type of cooler. They are usually made from aluminium or stainless steel and are often lined with thin plastic, with foam separating the metal exterior from the plastic interior. The type of plastic used in the lining of a cooler is important, as it determines the cooler's durability and effectiveness.
There are a variety of plastics used in coolers, each with its own advantages and disadvantages. High-density polyethylene (HDPE) is the most commonly produced plastic in the world and is used in hard plastic coolers. It has a simple structure composed of only carbon and hydrogen, and offers excellent electrical insulation, chemical resistance, toughness, and a low price point. However, HDPE is not as durable as some other plastics and can be more susceptible to environmental damage.
Other types of plastics used in coolers include polyurethane (PU) foam, which is a secondary material produced from the reaction between an isocyanate and a polyol, both derived from crude oil. The hardness of the PU foam can be adjusted by changing the molecular weight of the polyol, with higher molecular weights resulting in rigid foams suitable for creating hard and inflexible plastic coolers. While PU foam is effective for insulation, it has a negative impact on the environment.
Some coolers also use a combination of plastics, such as high-impact polystyrene, polypropylene, or polyethylene for the interior, and molded high-density polyethylene for the outer shell. ABS plastic is another option, but it becomes brittle below 30 degrees Fahrenheit, so it may not be suitable for certain applications.
The choice between a metal or plastic cooler depends on the specific needs and preferences of the user. Metal coolers offer high durability and can withstand significant wear and tear, but they are also heavy and less portable than plastic coolers. Plastic coolers, on the other hand, are more affordable, lightweight, and portable, but may not offer the same level of durability as metal coolers. Ultimately, the decision comes down to the intended use, desired features, and budget.
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Soft-sided coolers are made from vinyl, cotton, polyester, etc
Coolers are available in a variety of materials, including hard plastic, metal, and soft-sided options. Soft-sided coolers are made from flexible materials such as vinyl, cotton, polyester, canvas, nylon, or other fabrics. They are lightweight, small, and have a soft exterior, as opposed to the hard outer shell of traditional coolers. These coolers are designed for short trips and have less cold retention than standard coolers. They are also more portable, often featuring multiple carrying options such as side handles, top handles, and crossbody straps.
Soft-sided coolers are a popular choice for consumers due to their familiarity and affordability. They are commonly seen at barbecues, big-box stores, and similar settings. While they may not offer the same level of insulation and ice retention as hard plastic coolers, they are still effective for their intended purpose. The flexibility of soft-sided coolers also allows for a certain amount of "give," making them easier to fit into tight spaces.
The materials used in soft-sided coolers vary, with some made from natural fabrics like cotton or canvas, while others utilize synthetic materials such as vinyl, polyester, or nylon. These synthetic materials can provide advantages such as durability and water resistance. For example, vinyl is known for its sturdy and long-lasting qualities, making it a popular choice for soft-sided coolers.
In terms of maintenance, soft-sided coolers may require special care to prevent the build-up of mold or mildew. It is recommended to wipe down the interior and exterior of the cooler with a soft cloth, mild dish soap, and water. Allowing the cooler to air dry before zipping it closed is also crucial to maintaining its cleanliness.
Overall, soft-sided coolers made from vinyl, cotton, polyester, and other materials offer a convenient and popular option for consumers. They provide flexibility, portability, and ease of use, making them a practical choice for quick outings and everyday use.
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Frequently asked questions
Coolers are made from a variety of plastics, including polyethylene, polyurethane foam, and elastomer. Polyethylene is the most common type of plastic used in coolers, with high-density polyethylene (HDPE) being the most popular type of polyethylene for coolers.
Coolers can be made from a variety of materials, including plastic, metal, fabric, and foam. Metal coolers are the least common type, while soft-sided fabric coolers are the most widely used. Hard plastic coolers are also popular due to their affordability, durability, and decent insulation and ice retention.
Hard plastic coolers tend to be affordable, durable, and offer decent insulation and ice retention. Injection-molded and rotomolded coolers are superior to their commonplace counterparts in terms of durability, hardware, features, and ice retention.
Hard plastic coolers may not be as effective at retaining ice as other types of coolers, such as metal coolers or rotomolded coolers. They may also be heavier and less portable than soft-sided coolers or backpack coolers. Additionally, the plastic used in coolers can contribute to environmental damage due to its long-lasting nature.
