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Applications: Industrial pneumatic and hydraulic hoses, filters (fibers), aerospace
cable sheathing, oil tanks, electronic connectors, housings, clips, oil and gas
industry for flexible (offshore) flow lines, flexible liners, umbilical lines and cables,
pipes, fittings, valves, medical catheters, solution bags, food and beverage tubes,
medical equipment, sports components for rackets, shoe soles, skies (top layer).
34) Polyamide 12 (Nylon 12) :
Is a semi-crystalline, white coloured opaque aliphatic polyamide with a glossy
surface. It has low moisture uptake and very high chemical resistance. Similar to
Nylon 11 it has much less amide groups than PA6 and PA66, which causes the
Young’s Modulus to be lower, but it is much less affected by moisture from the
environment. PA12 is very ductile and have very high impact resistance even at low
temperatures, has low coefficient of friction and high wear resistance.
Density 1.02 g/cm 3
Melting point Tm 175-180°C
Pre-drying of material necessary. Processed by injection moulding, extrusion and
blow moulding techniques. Besides that, PA12 is also used in a powder form in
selective laser sintering (SLS), a rapid manufacturing technique and as a powder
coating for metals.
PA 12 has very good resistance against greases, oil, fuels, hydraulic fluids and
many solvents. More resistant to diluted acids and bases than other polyamides.
Nylon 12 has a lower modulus, higher elongation, lower strength, lower thermal
distortion temperature, lower hardness, and lower melting point than Nylon 66 but
has higher cost. However, Nylon 12 absorbs half as much water on Nylon 6.6.
Thus, even though the properties may not be as good as Nylon 6.6 in dry conditions;
the properties of Nylon 12 will be much more consistent when it is used in
applications in which water may be present.
Applications: automotive and industrial hoses, connectors, tanks for fuel, brake
and cooling liquids, electronic connectors, aerospace hydraulic and air-
conditioning hoses, medical equipment, communications and sports industry.
35) Polyphtalamide (PPA) :
Is a semi-crystalline, aromatic polyamide (nylon) composed from a diacid and a
diamine. They are polyamides containing aromatic rings in their backbones, which
gives them high mechanical strength and thermal resistance.
Polyphthalamides have many advantages over traditional polyamide nylons like
improved chemical resistance, higher thermal capabilities, low moisture
absorbance, stiffness and creep resistant.
Density 1.11 - 1.2 g/cm 3
Drying is recommended for 4 hours at 110°C. Injection Moulding process
temperature of 320-345°C and mould temperature of 80-120°C is recommended.
Strengths: excellent retention of performances in a wide range of conditions, high
stiffness and strength, low friction, dimensional stability, improved solvent and
hydrolysis resistance compared to PA 66, good creep and chemical resistance,
good electrical properties, good fatigue resistance, , resist infrared soldering
environments, used to replace metals in chemical, automotive and high
temperature applications.

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