Product Design - Major Project / Materials research

Hello,

Today I have done research on the material that I can use for my lunchbox. Searching the internet I came across a similar lunch box that you can buy on amazon.

This lunch box was made of high quality plastic. It is called 'Food Grade Plastic'.

amazon.com

Follow this material I done research about that. Choosing the right material for the food container is very important, and it must be resistant to heating up to 50 Celsius. 

www.bpf.co.uk

for example, want to place a highly acidic food like pickles or tomatoes into a plastic container where it could leach chemicals and additives into the food product.

www.dupont.co.uk

I found a special plastic that can be used to make my lunchbox. It is a high temperature plastic that  stands up to hot air, hot oil and hot water. It combines superior performance and great surface appearance with the high flow and ease of processability that nylon is known for.

It is really good material for my product, lasts two to three times longer than other nylons when exposed to aggressive chemicals also withstands 4,000 hours of exposure to hot air. Retains the majority of its weld strength after 1000 hours at 210 degrees C, while traditional materials have dropped to almost zero.

www.amazon.co.uk

I was thinking about different materials such as wood, but this material it's unsuitable to heating it to 50 Celsius. 

Searching the internet I found metal storage boxes and lunch boxes. 

elephantbox.co.uk

In conclusion, I think metal is a dangerous material for my lunchbox, because it heats up with food inside and a person who using box can burn. According to science, metal is a good conductor of heat and heat can transfer to human hand very fast. Therefore, the user hand maybe burned.