EXTRUSION DRYER FOR RUBBERY POLYMER, DRYING METHOD OF RUBBERY POLYMER, AND PRODUCTION METHOD OF RUBBERY POLYMER
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United States of America
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Feb 13, 2020
app pub date -
Oct 23, 2017
filing date -
Oct 23, 2017
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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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