Principles of Polymer Foam Classification

Mankind has long been interested in natural gas-filled materials. The combination of lightness and buoyancy with strength and good heat insulation properties ensured 

At present, hundreds of various elastic and rigid gas-filled materials used literally in all branches of industry are produced on the basis of reactive oligonwrs and high polymers. The production of these materials is rapidly expanding. Thus, in 1970 the world output of plastic foams was 2 million tons, in 1975 3.5 million tons, 1980 it will be 5-6 million tons, and in 1985 about 20% (6% in 1975) of all plastic materials will be gas-filled  

---