Page 271 - Engineering Plastics Handbook

Thermoplastic Polyimide (TPI) 233

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TABLE 10.6 Standard Aurum Grades
Properties Unit PL450C JCN3030 JGN3030

Filler Natural Carbon fiber Glass fiber
Specific gravity — 1.33 1.43 1.56
Mold shrinkage (MD/TD) % 0.74/0.85 0.00/0.66 0.16/0.78
Tensile strength Mpa 92 228 165
Elongation % 90 2 3
Flexural modulus GPa 2.9 19.0 9.5
Izod impact J/m 88 108 118
HDT °F (°C) 460 (238) 478 (248) 473 (245)
CTE MD/TD (E-5)/F 3.1/3.1 0.3/2.6 0.9/2.9
Flame retardance — V-0 V-0 V-0
UL-94 (0.4 mm)

MD = Machine direction
TD = Transverse direction
HDT = Heat deflection temperature
CTE = Coefficient of thermal expansion

Glass-fiber-filled—JGN3030. JGN3030 consisting of 30% glass fiber has
outstanding thermal and electrical properties as well as mechanical
properties. It is used for high-temperature burn in sockets needed for
tight tolerance, test sockets, insulator bushings and picker fingers and
gudgeons in copiers and printers, pistons for compressors, LCD treat-
ment supporters, and radiation parts.

Wear and friction grades—JCL3030, JCF3030, JNF3020. The JCL3030,
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JCF3030, and JNF3020 are standard Aurum wear and friction grades,
which offer outstanding wear resistance to mating metals for many
kinds of bearing applications. See Table 10.7.
JCL3030 with 30% carbon fiber and a small amount of lubricant filler
has a unique balance of mechanical, tribological, and thermal proper-
ties. It can be used in oil or dry conditions against hard metal, such as
steel and cast iron. Since it has a high amount of carbon fiber, it can with-
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stand high loads. This is why Aurum is used in copier thermal insula-
tor bushings, high-load thrust washers in automotive and off-vehicle
transmissions, vane wear strips, valve seats, gears, pads, and chains in
industrial applications.
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Aurum JCF3030 components are excellent replacements for metal
and other plastics. A combination of 15% carbon fiber and 15% PTFE
enables tight leakage properties in automotive transmission seal ring
applications. The grade offers outstanding tribological properties at
high speed in oil environments.
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JNF3020 is the softest material of all Aurum grades, which consists
of 20% PTFE. It is feasible for wear and friction properties against soft
metals such as aluminum, copper, and brass.