Whoopsie

So who knew that newly manufactured rolls of foam sheeting are full of butane gas? This guy does. Well, he knows it *now.*

Fun fact:

https://www.borealisgroup.com/polyolefins/polymer-solutions/foam-solutions/10-frequently-asked-questions-about-po-foam

Question 1: Which physical foaming agent (gas) is the best in PP foam production?

Answer 1: The choice of the best physical foaming agent depends on the target foam. Hydrocarbons, like iso- or n-butane, are used in production of the lowest density foams, whereas inert gases, like supercritical CO2 or N2, are used in production of foams with densities typically higher than 200 kg/m3.