hi i'm planning to make a cuestick case and i want to make it thermo resistant with outside temperature.

I'm looking for a material or materials that i could use that could maintain my cue stick temperature if and when outside temperature of 50 deg C or higher (i.e. inside of a car parked outside of the house on a sunny day) for the longest time.

im thinking of pvc pipe layered with some kind of material outside and inside the pipe

any suggestions? thanks alot.

Oops! Already two months ago...

Well, you need some tough casing selected for its mechanical - not thermal - properties. Beware PVC is brittle - make your experience before. Polypropylene is better. Wood looks good. +50°C is nothing difficult for plastics.

Then, you need a thermal insulator to keep the cue temperature constant as long as possible. Polystyrene foam is excellent there. Polyurethane foam as well. You may also find polyethylene foam, for instance as camper's mattress. All would also protect your cue stick against shocks.

By the way, some firms specialize in building such cases, exactly with this composition - for shock protection.

You might want to add some material around the cue stick (within the foam) to increase the heat capacity. Little difference between the materials here. Polyethylene is good, wax as well, other plastics are almost as good.

Closing the case (almost) airtight is more important than optimizing the foam, as air movements will carry more heat than is conducted through the foam. Some kind of felt on the foam would be nice to stop the air movement while allowing for tolerances. Also looks better.

For the efficiency, I would suggest to experiment rather than compute.