Liquid Crystal Polymer
Symbol: | LCP |
Crystallinity: | Crystalline |
Trade Names: | Vectra, Xydar, Ekkcel |
Description:
LCP is a self-reinforcing, highly crystalline polyarylate that produces a very tough part with excellent electrical properties, is chemically inert and is resistant to exposure, hydrolysis and flame. It is molded at very high temperatures (550 – 800°) and is outstanding for high-temperature long-wear parts.
Processing Considerations:
- Residence Time: Residence time is typically between 1.5 to 4 minutes.
- Back Pressure: Back pressure should be 200 PSI (2000 Plastic Pressure) or less.
- Drying: Drying this material is recommended..
- RPM: RPM is normally 30 or greater.
Screw Design Based on:
- High Compression Ratio
- Medium Transition Length
- Shallow Meter Channel Depth
Other Information:
- *Mixer:*Low to high shear mixing screws can be used to process LCP.
- Barrier: Residence time will determine the usefulness of a barrier designed screw.
- Custom Design: Optimal processing of LCP requires a special screw design which takes into account clearances between the screw and barrel.
- Recommended Valve: Valves can be 3-piece free-flow, 3-piece locking, 4-piece or ball check.
- Screw & Barrel Material Recommendation: Do NOT use chrome-plated screws. Processing temperature is too high. Components manufactured from special alloys are required.
Various additives and/or fillers can have an effect on a resin’s process behavior. For more detailed information, please contact Reiloy Westland Corporation.