A thermoset resin (e.g., epoxy, phenolic or BMI) in the form
of a thin film or paste, cured under heat and pressure to bond a
wide range of composite, metallic and honeycomb surfaces.
A high strength, high stiffness fiber derived from polyamide. Kevlar
® and Nomex ® are examples of aramids.
Fiber produced by carbonizing precursor fibers based on PAN
(polyacrylonitrile), rayon and pitch to eliminate non-carbon atoms.
The term is often used interchangeably with graphite. However, carbon
fibers and graphite fibers are made and heat treated at different
temperatures and have different carbon contents.
Product made by combining two or more dissimilar materials
such as fibers and resins to create a product with exceptional structural
properties not present in the original materials.
Laminate The basic building material for printed wiring boards.
The laminate uses resin-coated fiberglass and external plies of
copper foil which are cured in high-pressure flat presses.
The outside protective shell of a jet engine, traditionally made
out of metal. Cowls or cowling mainly provide the engine with protection
from the elements and with structural support.
A measure of an electrical laminate’s dimensional movement (in three
dimensions) when exposed to temperature cycles.
Completed composite components that typically are manufactured from
prepregs, honeycomb, adhesives and assembled hardware. These parts
are ready for direct attachment to a structure (e.g., aircraft)
or to subassemblies. Emerging manufacturing processes allow the
fabrication of engineered products directly from reinforcing fibers/fabrics
and matrix resins.
A secondary structure of an airplane providing enhanced aerodynamics.
Typically, fairings are found where the wing meets the body or at
various locations on the leading or trailing edge of the wing.
Filaments made by drawing molten glass, commonly used to reinforce
A process to manufacture composite materials components such as
rocket casings and cylinders. Fiber filaments are impregnated in
a resin matrix and then wound in a predetermined pattern over a
form with the shape of the desired component.
A unique, lightweight, cellular structure made from either metallic
sheet materials or nonmetallic materials (e.g., resin-impregnated
paper or woven fabric) and formed into hexagonal nested cells, similar
in appearance to a cross-section of beehive.
Finished internal aircraft components, such as overhead stowage
compartments, lavatories, sidewalls, floor panels and ceilings.
An aramid fiber from DuPont. Woven Kevlar ® fabrics are used in
both ballistic and composite materials applications.
The physical measurement of stiffness in a material. A high modulus
indicates a stiff material.
An electrical laminate that uses three or more layers of circuitry.
These laminates are used in complex, high-density circuit designs.
The protective shell of a jet engine housed within the cowling,
usually made from honeycomb. Provides noise absorption, insulation,
structural support and can aid heat dissipation.
DuPont’s registered trade name for its high temperature resistant
aramid papers, pressboard, staple fibers and filament yarns. Nomex
® aramid paper is used in the manufacture of honeycomb.
A polymer which when spun into fiber is used as a precursor material
in the manufacture of certain carbon fibers.
The PAN, rayon or pitch fibers from which carbon or graphite
fibers are derived.
A composite material made from combining high performance reinforcement
fibers or fabrics with a ther-moset or thermoplastic resin matrix.
When cured under high temperature and pressure, exceptional structural
properties are achieved.
An electronic platform containing etched copper circuitry
and multiple layers of interconnected circuitry, and assembled with
microprocessors, passive devices and other electronic components.
The housing which protects the aircraft radar system from the elements
while allowing transmission of radar signals.
A strong material which when combined with a resin matrix forms
a composite material. Reinforcements are usually continuous fibers,
which may be woven. Fiberglass, aramid and carbon fibers are typical
Fabrics Woven fiberglass, carbon or aramid fabrics used in production
of prepregs and honeycomb.
The reinforcement or repair of existing structures to strengthen
them or increase their ability to withstand an earthquake or other
forces. Until recently, repair and retrofit was done with traditional
materials like steel, but now it can also be done with composite
In reinforced fiber composites, the formulated polymeric substrate.
A one-sided or two-sided copper clad standard electrical laminate
used in low cost applications. Usually uses eight plies of 7628
A stiff and lightweight panel consisting of thin sheets such
as aluminum or cured prepreg laminate bonded to a low density, rigid
core material (e.g., foam or honeycomb).
The forming, shaping, machining or bonding of sheets or blocks of
honeycomb into profiled and complex shapes for use as semifinished
components in the fabrication of composite parts and structures.
Finished components for aircraft and industrial applications. For
aircraft, these may be for primary or secondary external structures.