IPC-TM-650 EN 2022 试验方法--.pdf - 第280页
1 Scope This method covers the determination of the force required to i nitiate tearing in flexible insulating materials. It is based o n AS TM D1004. 2 Applicable Documents Standard Test Methods for Thickness of Solid E…
Note:
Note:
The Institute for Interconnecting and Packaging Electronic Circuits
2215 Sanders Road • Northbrook, IL 60062-6135
Material in this Test Methods Manual was voluntarily established by Technical Committees of the IPC. This material is advisory only
and its use or adaptation is entirely voluntary. IPC disclaims all liability of any kind as to the use, application, or adaptation of this
material. Users are also wholly responsible for protecting themselves against all claims or liabilities for patent infringement.
Equipment referenced is for the convenience of the user and does not imply endorsement by the IPC.
Page 1 of 1
IPC-TM-650
TEST
METHODS
MANUAL
1
.0
Scope
A
test
method
for
measuring
the
geometric
irregularities
(roughness,
waviness,
etc.)
of
the
surface
of
metal
foils.
2
.0
Applicable
Documents
None
3
.0
Test
Specimen
Any
sample
of
metal
foil
to
be
tested.
Care
must
be
taken
to
insure
that
there
are
no
wrinkles
or
kinks
in
the
sample.
4
.0
Apparatus
4.1
Amplimeter,
with
range
selector
for
measuring
surface
roughness
in
micro
inches.
4.2
Pilotor
(electric)
used
to
operate
the
tracer.
4.3
Tracer,
for
tracing
and
detecting
surface
irregularities.
4.4
Controlled
Roughness
Specimen
4.5
Surface
Plate
5
.0
Procedure
5.1
Test
5.1.1
Place
the
amplimeter
on
a
rigid
support
such
as
a
work
bench,
stand,
or
machine
table
with
space
beside
it
for
the
pilotor
that
will
be
used.
Do
not
connect
the
amplimeter
to
a
power
line
supply¬
ing
heavy
induction
equipment
such
as
induction
furnaces,
welders
and
induction
motors.
The
starting
and
stopping
of
such
equipment
will
cause
fluctuations
in
the
AC
line
voltage
which
may
result
in
erroneous
roughness
readings.
5.1.2
Set
the
AA/RMS
selector
switch
at
AA
(for
arithmetical
average),
and
turn
on
amplimeter.
Number
2.4.15
Subject
Surface
Finish,
Metal
Foil
Date
Revision
3/76
A
Originating
Task
Group
N/A
1.
Position
the
tracer
with
an
appropriate
skidmount
in
place
on
the
work
surface.
Do
not
try
to
use
the
tracer
without
a
skidmount.
2.
With
the
tracer
stationary
and
the
pilotor
cable
discon¬
nected
read
the
amplimeter
digital
display.
If
the
reading
is
higher
than
the
work
allows,
move
the
setup
to
a
steadier
support
and
repeat
the
check.
3.
The
displayed
reading
should
not
be
greater
than
1
0%
of
the
roughness
to
be
measured.
5.1.4
Set
the
roughness-width
cutoff
at
0.030
inch.
5.1.5
Set
the
“Range”
selector
switch.
5.1.6
Set
the
pilotor
stroke
length
between
1
in.
and
1
.5
in.
5.1.7
To
make
sure
that
the
equipment
in
paragraph
4.0
is
operating
properly,
take
a
reading
of
the
rated
roughness
specimen.
The
controlled
roughness
specimen
must
be
thoroughly
cleaned
before
it
is
used.
A
dirty
specimen
will
give
erroneous
readings.
5.1.8
If
erroneous
display
readings
are
obtained,
check
the
following
conditions:
1.
Amplimeter
is
turned
on.
2.
Tracer
is
connected
to
the
amplimeter
with
all
connections
tight.
3.
Tracer
is
moving
over
the
work.
4.
Tracer
point
is
in
contact
with
the
work.
5.
Check
the
tracer
cable
for
wear
and
for
open
or
short
cir¬
cuits.
6.
Check
for
a
blown
fuse
in
the
amplimeter.
5.2
Evaluation
Record
roughness
readings
in
micro
inches
using
Arithmetical
Average
(AA).
A
minimum
of
3
areas
per
sample
should
be
taken
for
determining
the
surface
rough¬
5.1.3
Check
setup
for
minimum
vibration.
ness.
1 Scope
This method covers the determination of the force
required to initiate tearing in flexible insulating materials. It is
based on ASTM D1004.
2 Applicable Documents
Standard Test Methods for Thickness of Solid
Electrical Insulation
Standard Test Method for Tear Resistance
(Graves Tear) of Plastic Film and Sheeting
3 Test Specimens
3.1
The specimens be prepared using flexible dielec-
tric material. If the flexible dielectric is clad, the copper foil
be etched using standard commercial practices.
3.2
Ten specimens, five in the transverse and five in the lon-
gitudinal (machine) directions,
be cut from the sample
material.
3.3
The test specimens conform to the dimensions
shown in Figure 1.
4 Test Equipment
4.1 Testing Machines
A power driven machine of either of
the two following types
be used.
4.1.1 Static Weighing
Constant rate of grip separation
type, negligible movement of the upper jaw.
4.1.2 Pendulum Weighing
Constant rate of grip motion
type, constant rate of lower jaw movement, variable upper jaw
movement. Either maximum load indicating devices or record-
ers are permissible in the testing machine. The applied load,
as indicated by a recorder, dial or scale,
be accurate to
within 12 percent. If an indicating device is used, the indicator
remain at the point of maximum load after rupture of the
test specimen.
4.2 Grips
A gripping system that minimizes both slippage
and uneven stress distribution on the specimen
be
used.
4.3 Thickness Measuring Devices
Suitable calibrated
ratchet/friction thimble machinist’s micrometer reading to
0.0025 mm [0.0001 in] or less
be used for measuring
the thickness of the specimens. The micrometer
con-
form to ASTM D374.
4.4 Die
A die having the dimensions shown in Figure 1
be used to cut all specimens. The 90° angle be
honed sharp with no radius or have a minimum practical
radius, as per ASTM D1004. The cutting edge of the die
have a 5° negative rake, and be kept sharp and free
from nicks to avoid leaving ragged edges on the specimen.
Cutting may be facilitated by wetting the surface of the sample
and cutting edges of the die with water. The sample
rest
on a smooth, slightly yielding surface that will not injure the die
blade. Lightweight cardboard or a piece of leather belting is
suitable. Care should be taken that the cut edges of the speci-
men are perpendicular to its other surfaces and that the
edges have a minimum of concavity. NOTE: The test speci-
men results depend on the quality of the die used.
IPC-2416-1
101.60mm
26.95mm (x2)
25.40mm radius (x2)
Dimensional tolerances ±0.051mm [0.002 in]
Table of Metric-to-Imperial Equivalents
in.
4.0
0.750
1.061
1.000
1.118
2.0
0.500
101.60
19.05
26.95
25.40
28.40
50.80
12.70
mm
28.40mm (x2)
50.80mm (x2)
19.05mm (x2)
19.05mm
radius (x2)
12.70mm radius (x2)
90º±0.5º
3000 Lakeside Drive, Suite 309S
Bannockburn, IL 60015-1249
IPC-TM-650
TEST METHODS MANUAL
Number
2.4.16
Subject
Initiation Tear Strength, Flexible Insulating
Materials
Date
03/14
Revision
B
Originating Task Group
Flexible Circuits Test Methods Subcommittee
(D-15)
P g
Association
Connecting
Electronics
Industries
ASTM
D374
ASTM
D1004
shall
shall
shall
shall
shall
shall
shall
Figure
1
Die
for
Tear
Test
Specimen
shall
shall
shall
shall
shall
shall
Material
/n
this
Test
Methods
Manual
was
voluntarily
established
by
Technical
Committees
of
I
PC.
This
material
/s
advisory
only
and
"s
use
or
adaptation
，
s
entirely
voluntary.
IPC
disclaims
all
liability
of
any
kind
as
to
the
use,
application,
or
adaptation
of
this
material.
Users
are
also
wholly
responsible
for
protecting
themselves
against
all
claims
or
liabilities
for
patent
infringement.
Equipment
referenced
/s
for
the
convenience
of
the
user
and
does
not
imply
endorsement
by
IPC.
a
e
1
of
2
5 Conditioning
5.1 Conditioning
The test specimens be conditioned
at 23 °C ± 2 °C (73.4 °F ± 3.6 °F) and 50% ± 5% relative
humidity for not less than 24 hours prior to test.
5.2 Test Conditions
Conduct tests in the Standard Labo-
ratory Atmosphere of 23 °C ± 2 °C (73.4 °F ± 3.6 °F) and 50
± 10 percent relative humidity.
6 Speed of Testing
A jaw separation of 25.4 mm [1 in]
be used. The rate of travel of the power activated grip
be 51 mm [2 in]/minute and be uniform at all
times.
7 Procedure
7.1
Measure the thickness of the specimen at several points
to the accuracy limits of the measuring devices specified in
4.3. Record the average thickness in millimeters or microns
[in].
7.2
Place the specimen in the grips of the testing machine
so that the long axes of the enlarged ends of the specimen
are in line with the points of attachment of the grips to the
machine.
7.3
Apply the load at 51 mm [2 in]/minute rate of grip sepa-
ration. After complete rupture of the specimen, the maximum
tearing load in grams [ounces]
be noted from the dial
scale or recorder chart and recorded. Data from specimens
which break at some obvious flaw or which break in or at the
edges of the grips
be discarded and retests made.
8 Calculation
The average resistance to tearing be
calculated from five specimens tested in each principal direc-
tion of orientation. Data
be recorded as grams [ounces]
of tearing resistance.
9 Report
9.1
Report the average thickness of all specimens.
9.2
Report the average transverse and the average longitu-
dinal initiation tear strength values.
Number
2.4.16
Subject
Initiation Tear Strength, Flexible Insulating Materials
Date
03/14
Revision
B
P g
IPC-TM-650
shall
shall
shall
shall
shall
shall
shall
shall
a
e
2
of
2