Process for making thermoplastic polymer pellets
US8709315B2 · kind B2 · utility
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20References
20Claims
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Key dates
| Filing date | Aug 18, 2009 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Jan 31, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/919
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Provided is a process for making thermoplastic polymer pellets. The process has the following steps: (a) melting a thermoplastic polymer to form a polymer melt; (b) extruding the melt through a die to form a substantially continuous molten polymer extrudate wherein the die has a contact surface bearing a polymer coating having a surface energy of less than 25 mN/m at 20° C.; (c) cooling the extrudate to form a cooled extrudate; and (d) pelletizing the cooled extrudate to form a plurality of polymer pellets. Provided is also a polymer pellet shipping system and a stable thermoplastic polymer pellet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.