| abstract |
A method of making a foamed plastic part that introduces a blowing agent composition into a plastic substrate and releases at least carbon dioxide gas from the blowing agent composition such that pores are formed in the plastic substrate, wherein the blowing agent composition comprises an alkali metal, an alkaline earth metal, an aluminum, a transition. One or more carbon dioxide carriers selected from carbonates, hydrogen carbonates and carbamates of metals and / or ammonium, and one or more acid carriers. |