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| MIL-P-46183
6.
NOTES
6.1 Intended use. Polyetheretherketone (PEEK) thermoplastic materials are
intended for use as a matrix for glass fiber and carbon-graphite composites, for
injection molded parts and monofilament, and as insulation for electrical wire
and cable. The material has very low flammability, low smoke and toxic gas
emission, and resistance to gamma radiation.
6.2
Ordering data.
6.2.1 Acquisition requirements.
Acquisition documents should specify the
following:
a.
Title, number and date of this specification.
b.
Type and class of material.
c.
Specific pellet size, if required (see 3.3).
d.
Whether a preproduction sample is required and, if so, pertinent details
(see 4.2.1).
e.
Quality conformance tests, if other than specified in 4.2.2.
f.
Sampling plan, if other than specified in 4.2.2.2.
g.
Level of packing required (see 5.1).
6.3 Specific optical density. The maximum specific optical density, Dmax,
represents total smoke accummulation.
6.4 Gamma radiation resistance. Polyetheretherketone is extremely resistant to
embrittlement by gamma radiation. Wire samples, coated with various grades
(molecular weights) of PEEK polymer to a total diameter of 1.5 mm, have been
exposed to gamma radiation from 60Co spent fuel cells.
Samples were removed at 250 Mrad intervals until a maximum dose of 2000 Mrad had
been absorbed. The samples were subjected to a wrap test around a 1D mandrel
followed by a standard dielectric test (1.5 kV for 1 minute in water). In the
range suggested for high performance wire covering (melt viscosity = 0.4 to 0.5
kNsm-2), the dosage level of gamma radiation required to cause failure of the
insulation is of the order of 1100 Mrad (11 MGy). Note: 1 rad = 0.01 gray.
6.5
Sources of supply.
PEEK materials may be obtained from:
a.
ICI Americas
Concord Pike and New Murphy Road
Wilmington, DE l9897
b.
LNP Corporation
4l2 King Street
Malvern, PA l9355
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