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Nagase & Co., Ltd. and Nagase ChemteX Corporation have
jointly developed a one-part epoxy adhesive that hardens by
means of high frequency induction.
A process used in the hardening and shrink fitting of metals,
high frequency induction allows metals to be heated instantaneously
with excellent energy efficiency. For these reasons it had
often been considered as a method for hardening adhesives,
but because no adhesive had been able to withstand the rapid
temperature increases, successful application had not been
feasible.
XNR3628 and XNR3630 adhesives newly developed by Nagase ChemteX
do not blister even when their temperature is instantaneously
raised to a working temperature of 250 to 260 deg C by high
frequency induction. XNR3628 hardens in less than twenty seconds,
and the fast hardening type XNR3630 hardens in less than ten
seconds. What's more, these adhesives offer superb heat resistance
with a glass transition temperature (tg) of 150 deg C along
with excellent heat cycling characteristics.
Nagase has established high frequency induction hardening
facilities at its Mishima Branch and, jointly with customers,
is engaged in applications development in the areas of motors,
electric components, magnet adhesion for speakers and other
applications, coil fastening, and adhesion of other metal
products. The company plans to further develop high frequency
induction hardening facilities jointly with high frequency
generator manufacturer Showa Kikai Shoji Co., Ltd. and to
actively meet customer requirements for automated mass-production
facilities.
Features of the adhesive hardening system:
- Rapid hardening
Hardens a one-part epoxy adhesive in seconds (hardening
using conventional methods requires hours)
- Energy savings
Energy consumptions is 1/5 to 1/10 that of the conventional
convection method
- Space savings
Requires 1/10 the space of convection-based continuous ovens
- Reduction in fixtures use
(Source: Nagase ChemteX Corporation)
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