Method of manufacturing composite sheet materials
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United States of America Patent
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Jan 7, 1997
Grant Date -
N/A
app pub date -
Jul 13, 1993
filing date -
Nov 20, 1990
priority date (Note) -
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Abstract
A method of making a composite sheet material in which at least one lamina of previously unused expanded polystyrene is bonded to a second lamina of recycled expanded polystyrene. The laminae are continuously formed from separate extruders and are merged promptly after extrusion. Heat is applied to the laminae just before they are merged.
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