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A_World_of_Composite_Technologies - 15 Pages
Polyspeed® laminates and Modipur® polyurethanes
for rapid and cost-effective production
Laminates: Could your application
benefit from the lightness and
strength of fiber-reinforced epoxies,
but without the time consuming lay-
up and cure processes? Polyspeed®
is Hexcel's range of laminates, used
predominantly in the manufacture
of skis and snowboards, but
equally useful for many industrial
applications, wherever light, strong
and durable materials are required
to resist high stresses and strains.
The laminates are also suitable
as skins for sandwich panels.
Polyspeed® laminates are epoxy or
phenolic resin impregnated reinforced
materials, in which the matrix is
already cured. Hexcel manufactures
a range of unpressed laminates, with
woven reinforcements and a range
of pressed laminates with either
woven or UD reinforcements for high
performance. Polyspeed® laminates are
supplied as sheets or in roË form, and
can be delivered already slit to size.
Polyspeed® grid laminates, used in
the manufacture of large composite
structures, deliver a number of
benefits including cost-effective
manufacturing where infusion
technology is combined with
laminates or other pre-cured load-
carrying structures such as pultruded
components. Grid laminates also
provide mechanical fixing of dry
reinforcements prior to infusion and
contribute to the final mechanical
performance.The need for auxiliary
materials is also reduced and
there's no requirement for dry
reinforcement in wet processes,
as grid laminates contribute to
the structural performance.
Polyurethane: Do you need
to produce cost-effective high
performance components in high
production volumes? The properties
of Modipur® polyurethane (PUR)
systems enable complex shapes to be
achieved at low cure temperatures
and in rapid production cycles.
Hexcel supplies a wide range
of formulated two-component
polyurethane systems that are
used for sports, automotive and
other industrial applications. The
Modipur® range includes rigid,
semi-flexible and integral foams
with closed or open cell structures.
The products are used as core
materials, as insulation and/or for
their adhesive properties. Hexcel also
manufactures a polyurethane injection
molding system and a gel coat.
Reaction Injection Molding
(RIM) is a quick, clean production
method for medium-sized
polyurethane parts with moderate
temperature and pressure.A mixture
of two components is injected into
a mold and produces a solid non-
ceËular skin zone and a cellular core
of the foam - a one-shot composite.
These Modipur® formulations can
be tailored to meet virtually any
customer specification, enabling
a wide range of complex
shaped products for high-
volume production. Depending
on the hardness/density ratio
selected, parts ranging from large-
scale to compact and with or without
reinforcements, are possible. Current
applications include skis, automotive
parts and various other industrial uses.
Polyspeed® cured glass fiber epoxy laminates 13
are available In a range of thicknesses and
strengths, Ideal for skis and snowboards.
Polyspeed® grid laminates are woven
glass fiber epoxy laminates with an open
grid structure, supplied In roll form. Grid
laminate materials are available In a wide
fiber areal weight range from 500 up
to 1600g/m2 (14.75 up to 47.20oz/yd2)
Including flexibility on mesh size of the grid
pattern. The open grid structure provides
reinforcement whilst the holes enable liquid
resins or reactive foams to flow through the
lay-up structures, making the materials Ideal
for combined technologies where reactive
liquid systems need to be combined with
solid, already cured composite parts.
Modipur® polyurethane systems once mixed,
react and solidify, as a result of a reaction
from combining two-component thermoset
systems. Usually processed In a match-
mold set-up, PUR Is supplied In drums of
210kg (463 lbs), one ton containers or bulk
transport. For the Component 2 (Isocyanate)
Hexcel uses MDI and HDI and variations
rather than TDI or IPDI Isocyanates.
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HexWeb® honeycombs providing exceptional stiffness and strength with no added weight mm mm V.'.Vi.V.V.'. rrJËtiffffifftit\ Any... -
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Composite materials are progressively replacing aluminum and other metal alloys for new generations of commercial airplanes. Weight-saving...
