Page 38 - C:\Users\Adik\Documents\Flip PDF Professional\Marketer PPT LR\

requires extreme temperature resistance
Density 1.18 g /cm 3
Glass Transition Temperature Tg 78°C
Melting point Tm 295°C
Processed by extrusion and injection moulding methods
PA 46 is white opaque with glossy surface with high stiffness and strength when dry,
but much lower when moisture conditioned. At higher temperatures there is little
difference between dry and conditioned, shows low coefficient of friction, high level
of toughness and wear resistance. Its HDT at 1.8MPA is 160°C, and 285°C when
filled with 30% of glass fibers.
PA 4.6 is has superior mechanical resistance and fatigue resistance compared to
that of PA6.6.
Strength: often used to replace metal in demanding high temperature applications,
excellent tribological behaviour, have high fluidity so is a good solution for complex
shapes and parts with thin walls and extremely short cycle times are possible.
Limitations: high water absorption, less resistant to strong acids and bases, drying
before processing required.
Applications: (miniature) connectors, sockets for memory modules and
processors, LED's, (miniature) printed circuit boards, electronics and automotive:
lighting components, turbocharger inlet / intercooler, gears, industrial transmission
components, sensor encapsulation, films, fibers for belts, aerospace turbine engine
components, connectors.
33) Polyamide 11 (Nylon 11):
A semi-crystalline aliphatic polyamide with a very high chemical resistance. It has
relatively little amide groups in the chain compared to the most common nylons
(PA6 and PA66), therefore, the moisture absorption is low. This means that the
mechanical properties and dimensions are not influenced much by the environment
it is used in. PA11 is produced from a renewable resource: castor oil.
Density 1.03 g /cm 3
Glass Transition Temperature Tg 45°C
Melting point Tm 180-189°C
Max / Min continuous service temperature 125 °C / -45°C
Pre drying is required: 4-6 hours at 80-100°C
Processing by conventional extrusion, blow moulding, injection moulding and
rotomoulding.
PA 11 is white opaque with glossy surface with relatively low stiffness, possess high
toughness and ductility and can be used at a wide temperature range, and remains
ductile down to very low temperatures. Good resistance against oil, fuels and
hydraulic fluids. More resistant to diluted acids and bases than other polyamides.
Fiber filled grades for higher Young's Modulus and plasticized grades for flexibility
are available. Due to the relatively high price PA11 is mainly used in high
demanding applications where the excellent chemical resistance to hydrocarbons
and low permeability are vital.

DAVE TECHNICAL SERVICES 38