Method for producing pellets of liquid-crystalline polymer or pellets of liquid-crystalline polymer composition
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United States of America Patent
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Issued Date -
Dec 21, 2006
app pub date -
Jun 1, 2006
filing date -
Jun 1, 2005
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Abandoned
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Abstract
The present invention provides a method for producing pellets or pellets of a liquid-crystalline polymer composition with a reduced amount of anionic impurities such as chloride, nitrate and sulfate ions. The present invention provides a method for producing pellets of a liquid-crystalline polymer, which comprises: providing a molten state liquid-crystalline polymer in a polycondensation reaction vessel, pulling out the liquid-crystalline polymer from a valve at the bottom of the reaction vessel through a die to give a strand of the polymer, cooling the strand on a water cooling conveyor positioned below the reaction vessel, and cutting the strand to give the pellets, wherein the cooling water for the strand is pure water whose electrical conductance is not more than 10 .mu.S/cm.
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