Download Packaging Testing

TIPS & TRICKS for
PACKAGING TESTING
Are there hidden errors in your data?
WHY PERFORM
PACKAGING TESTING?
Testing provides quantitative information about
tear resistance, puncture resistance, peel
strength, heat seal strength, and durability of
materials used in flexible and rigid packaging, and
finished packaging products.
Insufficient or inadequate packaging can
result in
damaged, spoiled or lost product,
liability claims, unsatisfied consumers,
and ultimately …
a direct negative impact
on your company’s
bottom line.
PACKAGE TESTING
CAN BE TOUGH
Packaging can be delicate and easily
damaged by improper fixtures, grips or
jaw faces.
Package tests are often peel tests, so the
test signals contain many short, sharp
peaks and troughs.
Signal Conditioning plays a critical
role in the accuracy of data captured.
PACKAGE TESTING
CAN BE TOUGH
Sometimes there is a fine line between
being too easy and too difficult to open a
package.
Does your test data allow
you to distinguish between
the two,
especially when the application
is critical?
COMMON CHALLENGES
IN PACKAGE TESTING
Test Types
• Are you performing the correct test for your products?
Grip Slippage and Extrusion
• Are you using the best grips for your test?
Data Collection & Bandwidth Settings
• Are you viewing all peaks and troughs?
• Are you filtering out any relevant parts of the test signal?
TEST TYPES
Are you performing the best
tests for your materials or
components?
TEST TYPES: PEEL
T-Peel
180° Peel
BS 5350-C12
ASTM D5170
ASTM F88
ISO 11339
ASTM D3330
BS EN 28510-2
ISO 8510-2
ASTM D1000
Adhesive
Rigid Stainless
Steel Plate
90° Peel
BS EN 28510-1
ISO 8510-1
ISO 29862
ASTM D5109
ASTM D2861
ASTM D5375
TEST TYPE: TACK
Loop Tack
BS EN 1719
ASTM D6195
FINAT FTM9
Pressure-Sensitive
Adhesive Tapes
Probe Tack
ASTM D2979
Pressure-Sensitive
Adhesive
Dwell
1 sec.
Dwell
1 sec.
Probe
0.197”
diam.
Loop of
tape
Adhesive
1”-square
adhesive
contact area
OTHERS
PUNCTURE
(static or impact)
MIL-STD-3010
ASTM D5748
ASTM D7192
TENSILE
ASTM D882
ASTM D412
ASTM D638
ISO 527-1, 2, 3
COMPRESSION
FIXTURING
Are you using the correct
grips or fixtures for your
application?
WHICH GRIPS ARE BEST?
Using the correct grips is not always
straightforward. Certain gripping
mechanisms work best for different types
of tests, materials, and maximum loads.
Ultimately, 2 things should be avoided:
SLIPPAGE FROM THE JAW FACE
JAW BREAKS
SPECIAL PEEL FIXTURING
DATA RATE &
BANDWIDTH
Are your system
settings correct?
WHAT DO WE MEAN BY
BANDWIDTH?
Data is collected from the frame (load and
other analog input devices) in an analog
voltage format, and must be converted to a
digital signal in order to be read and
processed by software.
The analog voltage signals need to be
filtered in order to capture a digital signal
that both makes sense and is usable, i.e., to
filter out unwanted data from the signal.
We filter these incoming signals to block out
what is usually high-frequency “noise” by
adding a filter to the incoming data, thus
adjusting the bandwidth of the system.
An ideal bandwidth filters out
noise and is able to capture the
quickest events within a test.
SYSTEM BANDWIDTH
The frequency range (-fc to fc) in which a signal’s amplitude is non-zero,
which defines the responsiveness of the system when converting data
into an electrical signal.
Lower Bandwidth Systems:
Higher Bandwidth Systems:
filter out quick, transient signals that
can result in truncated curves and
missing peak values
track more quickly varying signals that
result in an output that more closely
approximates actual events
Signal
Amplitude
Frequency
(Hz)
fc
AN EXAMPLE
Same exact data …
Different bandwidths
DATA ACQUISITION RATE
How often a signal is saved
Data Acquisition Rate Too Low:
Data Acquisition Rate Just Right:
not capturing all of the important events in
a test
ensure that relevant and important peaks
and troughs in data appear in a test
1 kHz Data
Acquisition
50 Hz Data
Acquisition
Data shown is an approximation
SO WHAT DOES THIS MEAN TO ME?
Data Acquisition Rate and Bandwidth are important factors for peel testing
because, together, they dictate what data is captured from the system and
displayed on the test graph.
Bandwidth should be adjustable
to capture quick events, such as
the peaks and troughs of a peel
test curve
Data Acquisition Rate should
be adjusted according to the
bandwidth to ensure appropriate
visualization of the filtered signal
General Rule of Thumb:
Data Rate should be on the order of
10X the Bandwidth in order to gather
meaningful, accurate data
(see ASTM E1942)
THANK YOU FOR YOUR TIME!