LCP – Liquid Crystal Polymer
LCPs are cool, relatively new materials with interesting properties. They have tensile strength and modulus close to aluminum. Because of the highly oriented, rod like nature, of the polymer molecules, LCPs present some interesting design challenges. This is because the molecules will only form in straight lines. Additionally, the high orientation only occurs within about .040 of the surface of the part. Molecular orientation below this skin is random. As a result all of the strength of the material is in the skin. Good design data is not available for these materials, so prototyping is a must. prototypes must be molded, because of the molecular orientation mentioned above.
Applications: Electrical and Mechanical parts, Food containers, and any other applications requiring chemical inertness and high strength.
| Tensile Strength | Flexural Modulus | Impact Strength | Max Temp. | Chemical Resistance |
|---|---|---|---|---|
| 12,000-32,000 psi | 1,300,000-4,600,000 psi | 1.1-11 ft-lb/in notched izod | 430°-500° F | Good to Excellent |
Advantages
- Strong resistance to chemical attack
- Excellent thermal and dimensional stability
- Absorb little moisture
- Flame retardant
Disadvantages
- Causes weakness at weld lines
- Generally incompatible with other polymers
- Higher cost
Brand Names: Vectra, CoolPoly, Zenite