Method for producing homogeneously crystallized polycondensate pellets
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United States of America Patent
Stats
-
Oct 22, 2013
Grant Date -
Feb 18, 2010
app pub date -
Dec 5, 2007
filing date -
Dec 11, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to a method for the continuous production of semicrystalline polycondensate pellets. Said method comprises the following steps: producing a polycondensate material; shaping polycondensate pellets and solidifying the polycondensate melt in a liquid cooling medium, wherein the shaping of the pellets can be carried out prior to or after solidification; separating the pellets from the liquid cooling medium once the polycondensate pellets have cooled down to an average temperature that lies within the crystallization temperature range of the polycondensate; and crystallizing the pellets in a treatment chamber, the treatment gas being led in said treatment chamber in a countercurrent to the polycondensate pellets, the flow rate of the treatment gas being above the incipient fluidization point of the polycondensate pellets and the polycondensate pellets having a narrow dwell time spectrum in the treatment chamber.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2007 Application Filing Year
- B29B Class
- 146 Applications Filed
- 71 Patents Issued To-Date
- 48.64 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 4 Citation Count
- B29B Class
- 12.15 % this patent is cited more than
- 12 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Apr 22, 2025 |
