Open-cell foam and method of making
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 16, 2001
Grant Date -
N/A
app pub date -
Apr 20, 2000
filing date -
Mar 15, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An open-cell polystyrene foam is provided which is formed from a blend of polystyrene and an ethylene-styrene interpolymer. The ethylene-styrene interpolymer functions as a cell opening agent, and is used to control the open cell content of the resulting foam, which may contain greater than 80 percent open cells. The foam is produced by an extrusion process in which carbon dioxide is used as the preferred blowing agent. The resulting foams may be formed into beads, plank, round, sheets, etc.
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