Medical Design Briefs - May 2023 - 17

following CYROLITE® materials
selected for testing:
G-20 HIFLO, GS-90, and
Med 2.
crucial
CYROLITE® G-20 HIFLO
is a low- viscosity material
with a high melt flow index,
particularly suitable
for highly complex designs
and thin-walled and intricate
parts. CYROLITE® GS90
is a material with superior
clarity and easy flow ability,
and it is specifically designed
for high-energy radiation
sterilization. For example,
GS-90 shows no
sig nificant color shifts after
gamma sterilization. CYROLITE®
Med 2 has a higher
ductility and provides exMaterial
properties are
the
in
efficiently
ultrasonic
welding process. The ability
to
absorb and
Pull
Point
Fig. 6 - Hexagon 2.0 pull point.
cellent chemical resistance to a wide
range of substances occurring in the
medical environment, such as lipids, oncology
drugs, or complex disinfectants.
Other materials selected included MABS,
SAN, and PC medical grades. CYROLITE®
GS-90 was used as the material for
the USW tests with the other materials.
To make all tests consistent and comparable,
GS-90 was always used for the bottom
part and the other material was always
used for the top part.
transmit vibrations is important.
This is reflected,
for example, in the tensile
modulus. The higher the
modulus, the better the energy
is transmitted through
the material. In some cases,
however, the amount of
modulus and other inherent
properties showed inferior
results due to the parts
being more brittle. A test
matrix and basic material
descriptions are given in Table
1 to show the main experiment
setup.
The results for the CYROLITE®
grades G-20 HIFLO, GS-90, and
Med 2 are shown in Figure 7. For CYROLITE®
G-20 HIFLO, the best results
(highest tensile strength) were obtained
with all three welding forces with amplitude
25 µm. For 400 N welding force,
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Medical Design Briefs - May 2023

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Medical Design Briefs - May 2023 - COV1a
Medical Design Briefs - May 2023 - COV1b
Medical Design Briefs - May 2023 - Cov1
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