P.A.I.

P.A.I (Poly Amide Imide) Torlon®

Essentially a polycondensate of imide chains with aromatic diamines, this unique material orginally from Amoco Performance Products is manufactured by phosgenation of trimellitic anhydride and reaction of the acid chloride, with 4,4'-diaminophenyl methane in N-methyl pyrrolidone at room temperature.

Available in primarily rod and sheet Torlon® is available in the following grades:

Grade Filler Properties Applications

4203L 3% TiO2 + 0.5% PTFE High notched impact strength, high elongation good electrical properties Electrical insulator

4301 12% Graphite + 3% PTFE High compressive strength low coefficient of friction high wear resistance bearings, seal rings

4275 20% Graphite + 3% PTFE Similar to 4301 but higher wear resistance 4301+ higher performance

5030 30% GF + 1% PTFE High stiffness at elevated temperatures, high strength and dimensional stability valve plates, pistons, metal Replacement part

6000 30% mineral + 1% PTFE Good mechanical properties at high temperature, good electrical properties. Electrical & Mechanical components

7130 30% C-Fibre + 1% PTFE similar to 5030 but stiffer at high temperature, high fatigue strength. load bearing parts of high strength, Thermal insulation

Torlon® Polyamideimides can be characterised by the following properties:

High strength between -190°C and 260°C
High impact strength
High dimensional stability
High fatigue limit
High heat distortion temperature
Low coefficient of linear thermal expansion
Very good dielectric properties
High chemical resistance
Flame retardant (UL 94 V-0)
Resistant to oxidation
Resistant to high energy radiation
High UV stability
Low outgassing at high vacuum

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