Process for producing low density polyethylenic foam with atmosp

Details Process for producing low density polyethylenic foam with atmosp Process for producing low density polyethylenic foam with atmosp

1997-03-31

1998-12-15

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

264 51, 264DIG5, 521 97, B29C 4420

Patent

active

058492267

ABSTRACT:
Members either of the polyglycol family of substances, more generally, or of the polyglycol ether subset of polyether compounds, more particularly, both for their gas absorption properties and for their plasticizing effect in a polyethylenic extrudate, are combined with physical atmospheric blowing agents, such as, nitrogen, argon, carbon dioxide, water, and blends thereof, to produce uncrosslinked polyethylenic foams having densities as low as 10 kg/m.sup.3.

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