Extrusion dryer for rubbery polymer, drying method of rubbery polymer, and production method of rubbery polymer
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United States of America Patent
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Jun 20, 2023
Grant Date -
N/A
app pub date -
Oct 23, 2017
filing date -
Nov 4, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
An extrusion dryer for a rubbery polymer includes a cylinder equipped with a hopper for injection of the rubbery polymer at one end and a die at the other end. A screw is rotatably arranged inside of the cylinder, the screw having a shaft and a spiral flight formed on an outer surface of the shaft. The shaft includes multiple zones, each including a conveyance section and a compression section. In the zone closest to the die, the outer diameter of the shaft at the conveyance section is smaller than the outer diameter at the compression section.
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