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LCPs exhibit outstanding mechanical properties at extreme temperatures, have
excellent resistance to virtually all chemicals, good weatherability and resistance to
radiations and are inherently flame retardants.
Liquid crystal polymers come in a variety of forms from sinterable high temperature
to injection mouldable compounds.
LCP's have heat deflection temperatures as high as 306 °C at 264 psi when
reinforced with glass fiber. The resin's high melt flow and fast setup permits it to be
moulded into large, heavy walled parts as well as thin walled components. Its
thermal stability permits efficient use of regrind.
Strengths: Suitable for highly demanding applications, high MFI, Suitable for
moulding in thin sections and small parts with tight dimensional tolerances,
Excellent UV resistance, good insulating properties, excellent mechanical and
chemical properties, intrinsic flame retardant, meet federal standards for aircraft
interior use, excellent repeated sterilization resistance.
Limitations: Very high cost, severe stoving (pre drying) is necessary before
processing, high anisotropy of its properties; forms weak weld lines,
Applications: aviation, aircraft interiors, electronic connectors, sockets, chip
carriers, Metric plug connector, Miniature switches, Watch base plate , automotive
under hood parts, Sensor for car safety belt, Heater plug connectors, medical
applications like Needle free syringe, Surgical stapler, Skin stretcher, trays, drug
delivery systems, in diagnostics and surgical devices, chemical processing,
household cookware for conventional and microwave ovens.
POLYAMIDE (NYLONS):
Nylon is the generic name for all long-chain fiber-forming polyamides with recurring
amide groups and they comprise the largest family of engineering plastics with a
very wide range of applications.
They are tough, rigid and have good heat resistance but all absorb water. There is a
wide range of different grades identified by a numerical suffix, i.e. PA6, PA 6.6, PA
4.6, PA11 and PA 12. In the series of polyamides the number(s) refers to the
amount of carbon atoms between the amide functional groups (NH). Lower
numbers mean that there are more functional groups in the chain which form the
strong hydrogen bonds, resulting in a higher melting temperature. Although the
basic structure of the materials is similar the properties vary from grade to grade.
Moisture absorbance is decreased due to reduced polarity with further separation
and less regular location of the very polar amide groups. Resistance to thermal
deformation is lowered due to more flexibility and mobility in the methyl unit sections
of the main chain.
Both Polyamide 6 (PA6) and Polyamide 6.6 (PA6.6) are by far the most used
polyamide globally in many different markets and applications due to their very
good performance / cost ratios. When reinforced with glass fibers (short or long),
their stiffness can compete with metals.
Nylons can be readily machined. Mouldings can be decorated by plating, painting,
vacuum metallization, hot foil stamping, silk screen printing and laser printing.
Components can be joined by using a two part epoxy adhesive and ultrasonic
welding may also be used.

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