SAMPE Journal - July/August 2019 - 11
FEATURE
Fast-Cure
Resin System
High TG Fast-Cure Resin System
Jay R. Berndt, Jonathan C. Hughes, Nobuyuki Arai
Toray Composite Materials America, Inc., Tacoma, WA
INTRODUCTION
ABSTRACT
A
quick cure high glass transition temperature (Tg) resin
system designed for fast ramp rate cures up to press
molding conditions is discussed. The resin system is
able to fully cure within 10 minutes at the dwell temperature
of 163°C and a demold time of just 2 minutes, even when fast
ramp rates are used. The material has been shown to withstand
temperatures needed for the automotive electro-coat with
subsequent cures to apply the primer and topcoats while
maintaining a class "A" finish. Once cured the material also has
the ability for post machining and workability. The new CFRP
material also has excellent mechanical properties allowing it to
be used in structural areas. Due to the quick cure cycle, excellent
mechanical properties, broad range of UD and fabrics, and high
Tg of this CFRP, a broader use of carbon fiber composites both
in the automotive and industrial industries will be seen for both
structural and non-structural use.
w w w. s a m p e . o r g
As tougher emissions standards imposed by the
2025 US corporate average fuel economy and
European CO2 requirements come into effect
on the automotive industry1,2, the use of exotic
materials has been increasing in recent years.
Aluminum has been adapted and used by most
of the automotive companies due to the ease of
transition and similar manufacturing techniques
to that of steel. Carbon fiber composite parts can
improve the weight savings while also having the
highest stiffness to weight ratios of any material.
One way of doing this is to use the material in
specific areas in the BIW (Body in White) that need
the high stiffness of the CFRP. Due to the challenges
and the cost, full scale use of the material will be
slow to incorporate. However, integration of CFRP
into the "body in white" for key areas where stiffness
and weight reduction is needed has already begun.
The challenge will be the ability to coat these parts
effectively during the inline process, along with the
rest of the materials. Automotive companies will
need to coat the entire BIW with an electro-coat
(e-coat) to protect the metal parts from corrosion.
Even though corrosion is not a problem for the
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SAMPE Journal - July/August 2019
Table of Contents for the Digital Edition of SAMPE Journal - July/August 2019
Table of contents
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SAMPE Journal - July/August 2019 - Table of contents
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