|
RadTech
UV/EB Technology Conference & Expo 2008
May 4-7, 2008
Lakeside Center at McCormick Place
Chicago, Illinois - United States of America
ADHESIVES
Characterization of
High-Performance Adhesives
and Coatings by Photorheometry
Dr. Joel Schall, Henkel Corporation
Abstract:
Photorheometry is a relatively new physical technique that allows
one to determine with high reproducibility critical radcure performance
parameters such as fixture time and ultimate modulus. It provides
a valuable method for determining how these parameters are impacted
by variables such as air inhibition, lamp intensity, the lamp wavelength
emission profile, temperature, and irradiation time. Photorheometry
data can thus provide a comprehensive assessment of a sample's kinetic
and physical cure profile.
Laminating
Oligomers used to Produce Optically Transparent Adhesion to Glass
Deborah Smith, Sartomer Company
Abstract: New specialty oligomers were developed to increase
adhesive performance in low viscosity UV/EB curable laminating adhesives
for glass. Sample formulations will be discussed including refractive
indices, transmissions, clarity and surface tensions of glass and
adhesives, along with environmental conditioning of laminate structures.
Adhesive testing results will also be covered.
Print-Applied
UV-Curable Pressure Sensitive Adhesives for Industrial Graphics
Jeffrey Warmkessel, Ashland Performance
Materials
Abstract: Printable UV-cured pressure sensitive adhesives
(UV PSAs) afford process improvements and advances in design to
producers of industrial graphics and labels. A printable product
can lower cost by reducing adhesive waste and potentially eliminating
manufacturing steps compared to conventional methods. The flexo
or screen printing of a complex geometric shape, moisture release
channel or adhesive-free area in a part can be accomplished easier
than assembly die cutting. Historically, printable UV PSAs were
characterized as high tack, high peel adhesives with low cohesive
strength. While these properties are sufficient for a wide variety
of label applications, many industrial applications require high
temperature (>200°F) and chemical resistance. Graphic overlays,
membrane switches and nameplates are a few applications that can
take advantage of a printable, high performance UV PSA. A line of
UV curable, printable adhesives has been developed to meet the needs
of industrial graphics and label manufacturers. In addition to a
high tack/high peel resistance UV PSA for labels, a new high temperature
and chemical resistant UV PSA was developed. UL 969 Durable Label
requirements have been achieved. Overlay constructions subjected
to (221°F) for 30 days have retained the same peel force as
a leading transfer tape. Long term elevated temperature performance
at 221°F has been measured by static shear samples (1"
x 1" x 1kg) with results over 300 hours before failure. The
short term temperature performance has been measured by the Shear
Adhesion Failure Temperature (SAFT) test and found to be 350°F.
Resistance to common agents such as gasoline, engine oil, methyl
ethyl ketone, weak acid/base, salt water, etc., has been found to
be comparable to high performing transfer tapes. A brief description
of pressure sensitive adhesive and UV technology will be presented.
UL 969 adhesive performance testing along with other Pressure Sensitive
Tape Council tests will be presented. General market and application
techniques will be discussed.
Interested
in Registering >>>
Return
to Technical Conference >>>
|
|
