Maya Ellison
Pressure cookers are often heavy, so using plastic handles helps to keep the overall weight down. Plastic is also a cheaper material than metal and, crucially, it is an insulator of heat. This means that, unlike metal, it doesn't conduct heat well, so the handles remain cool and safe to hold, even when the cooker is hot. The type of plastic used is called Bakelite, which is a thermosetting plastic that can withstand temperatures of about 150 to 160 degrees centigrade.
| Characteristics | Values |
|---|---|
| Material | Bakelite, a thermosetting plastic |
| Composition | A composite of nylon and glass fiber |
| Weight | Lightweight |
| Cost | Cheap to produce |
| Heat | Heat-resistant |
| Electric | Electric insulator |
| Safety | Cool to touch, reducing burns |
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What You'll Learn
Plastic is a cheap material to produce, keeping production costs low
Pressure cookers often feature plastic handles because plastic is a cheap material to produce, keeping production costs low. Bakelite, the thermosetting plastic used in pressure cooker handles, is cheaper to produce than metal. It is also lightweight, helping to keep the overall weight of the pressure cooker down. Pressure cookers are already quite heavy, so the use of plastic handles helps to keep the weight manageable.
The use of plastic handles is also beneficial because plastic is a poor conductor of heat. This means that the handles remain cool to the touch, even when the cooker is hot. This is particularly important for pressure cookers, which can reach internal temperatures of up to 122 degrees Celsius. If metal handles were used, users could burn themselves when handling the cooker.
Bakelite, the type of plastic used in pressure cooker handles, was first developed by Leo Baekeland in New York in 1907. It is crafted from synthetic components, specifically the reaction of phenol and formaldehyde. While Bakelite is no longer widely used, it remains a popular choice for pressure cooker handles due to its heat-resistant and electrical insulation properties.
In summary, the use of plastic handles on pressure cookers is a cost-effective solution that also provides functional benefits, such as heat insulation and lightweight construction.
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Plastic is a poor heat conductor, preventing burns
Pressure cookers are often heavy, and using plastic handles helps to keep their overall weight down. Plastic is also a cheaper alternative to metal. However, the key reason why pressure cookers have plastic handles is that plastic is a poor heat conductor. This prevents burns when handling the cooker.
Plastic handles are typically made from Bakelite, a thermosetting plastic that is lightweight and cheaper to produce than metal. Bakelite is crafted from synthetic components and is known for its heat-resistant and electric insulation properties. It can withstand temperatures of about 150 to 160-degree centigrade, although it is not oven-safe as prolonged exposure to heat can soften it.
The poor heat conductivity of plastic is essential for user safety. Metal handles would conduct heat and reach the same high temperatures as the cooker's body, making it impossible to handle without oven mitts. Plastic handles, on the other hand, remain comparatively cool due to their heat-insulating properties. This allows users to safely lift and move the pressure cooker without the risk of burns.
The use of plastic handles is particularly crucial for electric pressure cookers, which have their own internal heating source. These cookers should never be placed in an oven as they can malfunction and potentially start a fire. The plastic handles help prevent burns when handling these electric cookers, ensuring a safer cooking experience.
In summary, the use of plastic handles on pressure cookers, especially Bakelite, is a deliberate choice due to plastic's poor heat conductivity. This property prevents burns, enhances safety, and makes pressure cookers more convenient to use.
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Plastic is lightweight, reducing the overall weight of the cooker
The handles of pressure cookers are made of plastic because it is lightweight, which helps to keep the overall weight of the cooker down. Bakelite, the thermosetting plastic used in pressure cooker handles, is very lightweight. Pressure cookers are already quite heavy, and using metal handles would make them even heavier. Plastic handles, therefore, make the cooker easier to handle and lift.
Plastic is also cheaper to produce than metal, which keeps down the production costs and the overall price of the cooker. Plastic handles are also beneficial because they do not conduct heat. Metal handles would become hot to the touch, and users would need to wear oven mitts to carry the cooker. Plastic handles, on the other hand, remain cool, allowing users to safely lift the cooker without the risk of burning themselves.
Bakelite, the type of plastic used in pressure cooker handles, is crafted from synthetic components and is known for its heat-resistant and electric insulation properties. It can withstand temperatures of about 150 to 160 degrees Celsius, although it is not recommended for use in ovens as prolonged exposure to heat can soften the plastic.
While plastic handles offer several advantages, it is important to note that not all pressure cooker handles are made of plastic. Some handles are made using tiny metallic components, while others use a composite of nylon and glass fiber, which is also heat-resistant and helps keep the handles cool. Inside the plastic handles, there may be a metal part that reinforces the cooker's handle.
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Plastic is an electric insulator, reducing the risk of electric shock
The handles of pressure cookers are made of plastic, specifically Bakelite, a thermosetting plastic that is a poor conductor of heat and electricity. This makes it a good choice for pressure cooker handles as it keeps them cool and safe to touch, even when the cooker is hot.
Bakelite is a synthetic plastic that was first developed in 1907. It is crafted from phenol and formaldehyde, which react together to form a composite that is initially soft but can be heated and hardened. In its final structure, Bakelite is insoluble and does not react to heat. This makes it ideal for use in pressure cooker handles as it can withstand temperatures of up to 150-160 degrees Celsius without melting or conducting heat.
The use of plastic handles on pressure cookers is a safety feature to reduce the risk of electric shock. Plastic is an electric insulator, which means it does not conduct electricity. This is in contrast to metal, which is an excellent conductor of both heat and electricity. If pressure cooker handles were made of metal, they could conduct electricity and potentially give the user an electric shock.
In addition to being a good electrical insulator, Bakelite is also lightweight and cheap to produce. This helps to keep the overall weight and production costs of pressure cookers down.
Overall, the use of plastic handles on pressure cookers is a practical and safety-conscious choice, providing a cool-to-touch, lightweight, and electrically safe option for users.
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Plastic handles are reinforced with metal parts
Pressure cookers use plastic handles to prevent burns and keep the weight of the unit down. Plastic is a poor conductor of heat and electricity, meaning the handles remain cool to the touch even when the cooker is hot. Metal handles, on the other hand, would heat up alongside the cooker, making it impossible to handle without oven mitts.
Plastic is also a lightweight material, which helps to keep the overall weight of the pressure cooker down. Pressure cookers are already quite heavy, so plastic handles are preferable to metal ones.
However, plastic handles are not without their drawbacks. While the plastic used for pressure cooker handles is designed to be heat-resistant, it can still melt at high temperatures. This means that pressure cookers should not be placed in ovens, as the handles may melt and cause a fire.
To address the potential weakness of plastic handles, they are often reinforced with metal parts. Inside the plastic handle, there is typically a metal component that is bolted to the main unit to reinforce the handle. This metal part adds strength and durability to the handle, ensuring that it can withstand the weight of the cooker and its contents.
The use of a metal reinforcement also helps to address the issue of plastic's relatively low melting point. By having a metal component within the handle, the risk of melting or softening is reduced, as metal has a much higher melting point than plastic. This adds a level of safety to the design, further reducing the risk of accidents or fires caused by melting handles.
In summary, pressure cookers use plastic handles for their heat-insulating properties and lightweight nature, but these handles are reinforced with metal parts to increase durability and address the limitations of plastic. This combination of materials ensures that pressure cookers are both safe and functional.
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Frequently asked questions
Plastic handles on pressure cookers are made from a material called Bakelite, which is a thermosetting plastic. Bakelite is a poor conductor of heat, keeping the handles cool and safe to hold even when the cooker is hot.
Bakelite is a type of plastic that was first developed in 1907. It is crafted from synthetic components and is known for its heat-resistant and electric insulation properties.
Metal is an excellent conductor of heat, so if metal handles were used, they would get very hot and potentially burn the user. Metal handles would also make the pressure cooker heavier and more expensive to produce.
No, the plastic handles would melt in the oven. Electric pressure cookers should not be placed in the oven as they will malfunction and may start a fire.
