Can anyone tell me how butane gas hair straighteners work?

I'm trying to use the same/similar technology for a project but struggling to find out any information on how the butane gas transfers to heat energy without a flame. 

These in particular - http://www.argos.co.uk/webapp/wcs/stores/servlet/ProductDisplay?storeId=10151&catalogId=19551&langId=110&productId=557918

rickharris5 years ago
1. possibly uses a catalyst

2. Produces a flame but inside a mesh where you can see it.