The packaging box for biological samples was built by:
Thermal insulating material;
The external area was produced with stainless steel, followed by an expansive polyurethane layer, and another layer of stainless steel, finishing the internal part.
It has 03 compartments, one for each type of packaging. At the site of the frozen samples, there is a nitrogen cylinder. It’s composed of an outer aluminum’s wall, attached to a second layer also of aluminum.
Subsequent to these two layers, there is a nitrogen storage compartment.
Inside there are sponges capable of absorbing liquid nitrogen in case of tipping, thus avoiding leaks and risk of accident.
To close the cylinder, a cap descends through the neck of the same, made with foam and plastic.