Because the plastic is the poorest conductor of heat (That means it doesn't heat up when it touches something that's hot). Metal is a great conductor of heat though, so if the handle were made of metal we would burn our hand whenever we touch the handle.
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Plastic is a poor conductor of heat; it doesnโt let heat flow through it. For instance, when we heat the water in a pan, we can lift the pan using the plastic handle because it doesnโt get hot, but if the same handle was of metal, we couldnโt have been to lift the pan because metal is a great conductor of heat.
The pan handle is made up of plastic because plastic is a poor conductor of heat, which means it will not heat up. Whereas metal is a good conductor of heat, which means it will heat up causing our hand to burn.
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Since Plastic is a poor conductor of heat, It is used as the handle in pans as it does not transfer the heat from the pan to the handle and burn your hand whereas if a good conductor of heat like metal was used then the handle would heat up and give you a First or Second Degree burn.
The handles of frying pans are made of plastic or insulating materials because plastic and insulating materials doesn't allow the heat to flow from pans to handles so that it will be easy to hold the frying pans.
They are basically made of plastic or insulating materials because insulating material doesn't allow the heat to pass through the pans to handles. thus it is easier for the person to hold the handle and the person's hand doesn't also burn.
The first and last answers simply are not correct, nor do they answer your question. The second, middle question is much better, but it does not fully answer your question either.
If a metal pan with a plastic handle is put in the oven at, let's say, 350 deg., then the temperature of the entire pan, metal and plastic, will eventually reach 350 deg. It is not true that the plastic won't get hot, actually it should heat up faster than the metal.
There are two properties in consideration: heat capacity and thermal conductivity. Metals in general have large heat capacities. One can think about the amount of heat a substance can store per unit mass, called the "Specific Heat," or one can consider the amount of heat a substance can store per unit volume. In the case of a pan and handle, it makes more sense to look at the question in terms of the heat stored per volume.
Most people know from everyday experience that metals stay hot longer than non-metals like wood and plastic. That is because metals have a much larger heat capacity per volume than most non-metals; that is they hold more heat.
What about thermal conductivity? In this case, we only need to consider the thermal conductivity of air.
Heat flows FROM a hotter object TO a cooler object. If a pan w/ plastic handle is put in a 350 deg. oven and allowed to heat up completely, when it is taken out the oven the pan and handle are at 350 deg. We only need to consider the heat transfer from the metal to the air and from the plastic to the air. Since the cooler material is the air, all that matters is the thermal conductivity of the air. You can look up thermal conductivities in a table, but air, and all gasses, have much lower thermal conductivities than almost any solid, and it is certainly lower than the pan and Bakeliteยฎ (the pan's handle). Since the handle does not contain as much heat as the pan, it will cool down to a touchable temperature faster.
The same applies if the pan is placed on a burner. The handle will take longer to heat up than the metal because 1) the metal is directly over the flame, and 2) the metal has a higher thermal conductivity than the plastic meaning that a lot more of the heat from the burner will be absorbed by the metal.
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The reason the pan Handle is made of plastic is because Plastic is not a conductor of heat so it won't get hot. If the handle was metal it would get very hot because it is a conductor of heat.
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Frying pans have plastic handles because plastic is a terrible conductor of heat that is coming from a stove. Therefore the handle is cool even when the metal of the frying pan is hot, when you need to lift it, or perhaps something else.
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Safety. Plastic will not conduct either heat or electricity, so in order you can safely handle pots and pans, plastic is used for those reasons.
Conductivity of air plays practically no role in this. If the pan heats up air in contact, that air is immediately removed by convection and replaced by cool air.
That is because when you are cooking you need to handle the pan most of the time while stirring or dodging the food you are cooking. All the pan is made up of conductive material that heats up so fast that it could burn your skin if handled bare handed EXCEPT for the handle that is made of plastic or other non-conductive material to make cooking safe and enjoyable
Rubber stamps come in many shapes and sizes. They consist of a handle, usually of wood or plastic, and the die--attached to said handle-- made of rubber or a rubber like substance.
A phillips screwdriver is generally made of a steel shaft with a plastic handle
The blade is metal and the handle is usually either wood or plastic.
a plastic pen is made out of a special type of plastic that is moulded to the shape of a pen! :)
yes plastic is a man made fibre