Slot die for producing webs of a foamed plastic material
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United States of America Patent
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Nov 5, 2002
Grant Date -
N/A
app pub date -
Jan 5, 2001
filing date -
Jun 12, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A slot die for producing webs of a foamed plastics material, into which die plastics material which has been plasticized under elevated pressure in an extruder and charged with a blowing agent enters, and through the die gap of which the plastics material is extruded by foaming. The die gap is formed by a pair of rollers mounted in a laterally sealed manner in the slot die. This achieves the effect that an advantageous formation of outer layers already occurs ahead of the die gap before the start of foaming.
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