Blowing Agent (Foaming agent) for PVC Plastisol

Manufacturer: We are manufacturers of products based on PVC plastisols including PVC gloves. We are now venturing into making foamed products but our initial work has not been successful. We believe that this could be due the wrong choice of blowing agent as our processing temperature is quite low at about 120 C.  We would appreciate very much if you could suggest some suitable blowing agents for our use.



John Woon (Senior Latex Consultant): Some of the most common blowing agents used for rubber and plastic do have high decomposition temperatures of more than 150°C which would of course not work satisfactorily if your processing temperature is only 120°C.

I suggest you evaluate the following:

Azo nitriles, bezene sulphonic acid hydrazide and ditroso pentamethylene tetramine.

Let me know the outcome in due course.