Designation: F1140/F1140M − 13
Standard Test Methods for
Internal Pressurization Failure Resistance of Unrestrained
Packages1
This standard is issued under the fixed designation F1140/F1140M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 These test methods explain the procedure for determin-
ing the ability of packages to withstand internal pressurization.
1.2 The burst test increasingly pressurizes the package until
the package fails.
1.3 The creep test maintains a specified pressure for a
specified time or until the package fails.
1.4 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
with the standard.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:2
E171 Practice for Conditioning and Testing Flexible Barrier
Packaging
F17 Terminology Relating to Flexible Barrier Packaging
F88 Test Method for Seal Strength of Flexible Barrier
Materials
3. Terminology
3.1 Definitions—For definitions and terms used in this test
method, refer to Terminology F17 for standardized terminol-
ogy for flexible barrier packaging.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 package failure—refers to rupture of seal or material.
3.2.2 restraint—a mechanism that prevents package move-
ment during inflation.
4. Summary of Test Method
4.1 Test Method A (Burst Test)—Packages are tested in an
apparatus that internally pressurizes the package until the
package fails. The pneumatic supply and pressurization equip-
ment need the capability to maintain an increasing pressure
until the package bursts. The test measure is the maximum
pressure detected before the package fails.
4.2 Test Method B1 (Creep Test)—Packages are tested in
apparatus that internally pressurizes the package to a specified
pressure and maintains that internal package pressure for a
specific time. The test measure is pass/fail.
4.3 Test Method B2 (Creep to Failure)—Packages are creep-
tested and held until the package fails. Test setup is similar to
that of the Creep Test except the pressure setting will need to
be higher to ensure the package fails in a reasonable amount of
time (that is, about 15 s). The test measure is the time until
failure.
5. Significance and Use
5.1 These test methods provide a rapid means of evaluating
tendencies for package failure when the package is exposed to
a pressure differential. Pressure differentials may occur during
processes such as sterilization and transportation.
5.2 These test methods are frequently used to quickly
evaluate packages during the manufacturing process and at
various stages of the package’s life cycle.
5.3 If correlations between pieces of test equipment are to
be made, it is important that all parameters of the test method
be exactly the same. Typical parameters may include, but are
not limited to, package size, material, seal configuration, test
equipment, rate of air flow into the package, sensitivity
(machine response to pressure drop), and position of test article
(see Fig. 1).
5.4 These test methods do not necessarily provide correla-
tion with actual package seal strength as typically measured
using Test Method F88 (or equivalent).
1 These test methods are under the jurisdiction of ASTM Committee F02 on
Flexible Barrier Packaging and are the direct responsibility of Subcommittee F02.20
on Physical Properties.
Current edition approved April 1, 2013. Published June 2013. Originally
approved in 1988. Last previous edition approved in 2012 as F1140 – 07 (2012).
DOI: 10.1520/F1140_F1140M-13.
2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
6. Apparatus
6.1 Packages are tested under unrestrained conditions as
follows:
6.1.1 Open Package Tester, used to test flexible packages
with one opened side.
6.1.2 Closed Package Tester, internally pressurizes the com-
pletely sealed package through a puncture.
6.2 The test apparatus for both open and closed package
testing shall include the following:
6.2.1 Means of Measuring the Pressure Inside the Package,
6.2.2 Timer, and
6.2.3 Pressure Regulator, intended to maintain steady or
increasing pressure in the package.
NOTE 1—If the pressure regulator cannot provide the necessary volume,
the porosity of the sample may need to be limited. (See Appendix X1.)
7. Sampling
7.1 Choose the number of test specimens to permit an
adequate determination of representative performance. Testing
of specimens with visual defects or other deviations from
normality may or may not be appropriate, depending on the
purpose of investigation. Indiscriminate elimination of defects
can bias results.
8. Conditioning
8.1 Standard Test Conditions—Condition packages and con-
duct testing in accordance with Practice E171.
8.2 If the test methods are conducted in other than standard
test conditions, record the temperature and relative humidity at
the time of the test method.
9. Procedure
9.1 Test Method A (Burst Test)—Place the package in the
apparatus and increase the internal pressure until a failure
occurs.
9.1.1 Open Package Test:
9.1.1.1 Package Preparation—The package may be tested
with or without the product enclosed. Record the package test
preparation.
9.1.1.2 Place the package in the test apparatus, and set the
specified parameters. The open package tester must be adjusted
such that the tester does not restrain the package from forming
its normal unrestricted height at the time of the burst.
NOTE 2—The package is typically positioned in one of the positions
shown in Fig. 1. Different positions may result in different test values and,
therefore, the final report should specify which position was chosen.
9.1.1.3 Begin the test method by starting the inflation
process. The rate of pressurization may affect the test results
and must not exceed the response rate of the pressure indicator.
Continue pressurization until a failure occurs.
9.1.1.4 Visually examine the package, and note the position
and type of failure (material or seal) and the pressure at which
it occurred.
9.1.2 Closed Package Test:
9.1.2.1 Package Preparation—The package may be tested
with or without the product enclosed. Record the package test
preparation.
9.1.2.2 Position the completely sealed package in the test
apparatus and carefully insert the pressurization entry device
(see Fig. 2). The center of the package is the preferred point of
entry. Location variations of the entry point may affect the
results of the test. Record the location of entry and perform all
sample testing at this same location.
NOTE 3—It is important not to damage other package surfaces when
FIG. 1 Open Package Test Positions
F1140/F1140M − 13
2
inserting the needle. If the package material tears easily, reinforce the
point of entry with tape or equivalent.
9.1.2.3 Begin the test method by starting the inflation
process. The rate of pressurization may affect the test results
and must not exceed the response rate of the pressure indicator.
Continue pressurization until a failure occurs.
9.1.2.4 Visually examine the package and note the position
and type of failure (material or seal) and the pressure at which
it occurred.
9.1.3 If no failure is visible but equipment is indicating a
burst, sensitivity settings may need to be adjusted, porosity of
package may need to be limited (see Appendix X1), or this test
method may not be appropriate.
9.2 Test Method B1 (Creep Test)—Place the package in the
test apparatus, internally pressurize to the specified pressure,
and maintain that pressure for a specified time. The suggested
starting pressure for the creep test method may be expressed as
a percentage of the burst pressure for that package. A common
starting point is 80 % of the burst value. Note however that the
specified creep pressure may be dependent on the materials or
sealing mechanism and may be raised or lowered to allow
testing to occur in an appropriate time range.
Test Method B2 (Creep to Failure)—Identical to Test Method
B1 except the pressure is held until the package fails. The
suggested starting pressure for the creep to failure test may be
expressed as a percentage of the burst pressure for that
package. A common starting point is 90 % of the burst value.
Note however that the specified creep pressure may be depen-
dent on the materials or sealing mechanism and may be raised
or lowered to allow testing to occur in an appropriate time
range. The time to failure is the test statistic.
9.2.1 Open Package Test:
9.2.1.1 Package Preparation—The package may be tested
with or without the product enclosed. Record the package test
preparation.
9.2.1.2 Place the package in the test apparatus and set the
specified parameters. The open package tester must be adjusted
such that the tester does not restrain the package from forming
its normal unrestrained height during the test. Package position
is important, see Note 2.
9.2.1.3 Begin the test method by starting the inflation
process. The rate of pressurization may affect the test results
and must not exceed the response rate of the pressure indicator.
Inflate the package to a specified pressure and hold for a
specified time, typically a value between 15 and 30 s.
9.2.1.4 During the pressurization and hold cycle (9.2.1.3),
observe the package to determine yielding of the seal or other
deformation that indicates a tendency to fail.
9.2.1.5 This test method is complete when a specified time
elapses or a failure occurs. Note the time elapsed and pressure
reading. Visually examine the package and note the position
and type of any failure (material or seal) and the pressure at
which it occurred.
NOTE 4—Failure of a package to reach its intended test pressure may be
a result of insufficient volume delivery of air. See Appendix X1.
9.2.2 Closed Package Test:
9.2.2.1 Package Preparation—The package may be tested
with or without the product enclosed. Record the package test
preparation.
9.2.2.2 Position the completely sealed package in the test
apparatus and carefully insert the pressurization entry device
(see Fig. 2). The center of the package is the preferred point of
entry. Location variations of the entry point may affect the
results of the test. Record the location of entry and perform all
sample testing at this same location. See Note 3.
9.2.2.3 Begin the test method by starting the inflation
process. The rate of pressurization may affect the test results
and must not exceed the response rate of the pressure indicator.
Inflate the package to a specified pressure.
9.2.2.3.1
For the creep test method (B1), hold for a specified time,
typically a value between 15 and 30 s.
9.2.2.3.2
For the creep to failure test method (B2), hold until the package
fails.
9.2.2.4 During the pressurization and hold cycle (9.2.1.3),
observe the package to determine yielding of the seal or other
deformation that indicates a tendency to fail.
9.2.2.5 This test method is complete when a specified time
elapses or a failure occurs. Note the time elapsed and pressure
reading. Visually examine the package and note the position
and type of any failure (material or seal) and the pressure at
which it occurred. See Note 4.
10. Report
10.1 Report the following information:
10.1.1 Test method performed (burst, creep, or creep to
failure), apparatus used, machine setting chosen if operator
adjustable, position of package, and blocking agent flow
limiting method.
10.1.2 Material type(s) and other characteristics of package
tested (with or without product), package lot number, and name
of source.
10.1.3 Date, time, location, and identification of the indi-
vidual performing the test method.
FIG. 2 Closed Package Test Fixture with Package Engaged
F1140/F1140M − 13
3
10.1.4 The number of packages tested, and the number of
package failures for each test method.
10.1.5 Conditioning parameters used for the test method(s).
10.1.6 Results:
10.1.6.1 Burst Test—The burst pressure value and location
at which failure occurred.
10.1.6.2 Creep Test—The internal pressure at which the
package was held and the hold time.
10.1.6.3 Creep to Failure Test—The internal pressure at
which the package was held and the time until the package
failed.
10.1.7 A summary including comments or conclusions, or
both, should also be reported.
11. Precision and Bias
11.1 Ten laboratories were supplied with test pouches in an
open and closed state. The open-state samples were a three-
sided sealed pouch with a fourth side unsealed. The same
pouch was used for the closed state samples, with the final side
sealed.
11.1.1 Test Method A, the aperture test, was evaluated by
eight of the laboratories involved at four measurements per
pouch. See Table 1.
11.1.2 Test Method B, the pressurization/hold test was
conducted at a test pressure of 9.96 kPa (40 in. H2O) for 30 s.
Eight of the involved laboratories reported at four measure-
ments per pouch. See Table 2.
12. Keywords
12.1 burst; closed package; creep; flexible packaging; infla-
tion; medical packaging; open package
APPENDIX
(Nonmandatory Information)
X1. TESTING PACKAGES WITH A LARGE POROUS AREA
X1.1 The testing of the seals of packages with porous
barrier materials may be limited due to the inability to provide
sufficient air volume. An example of this inability to provide
sufficient air volume may be encountered when the package is
so large that air leaks through the porous barrier faster than it
can be applied. Because of this air leakage, inadequate force
due to lower pressure will not allow either the bursting of the
seals or reaching the desired holding pressure level.
X1.2 Industry has typically responded to this effect by
limiting the porous barrier area. There are two major classifi-
cations of barrier blocking agents, the first being labels or tape,
and the second being non-solid agents that are spread across
the porous barrier material. Caution must be used with any
method of blocking to ensure that the porous barrier area is
consistently and uniformly covered or coated. When using
labels or tape as blocking agents, it is important that the
blocking material does not reinforce the seal area being tested
on the package. When using non-solid blocking agents that
require spreading over the porous barrier material, caution
must be used to ensure that the blocking agent does not affect
the seal bonding area by penetrating the porous barrier mate-
rial.
X1.3 Regardless of the method used, consistency of the area
blocked is necessary to provide minimum variability in the
method. Validation of these techniques is necessary when used
for regulated products.
TABLE 1 Precision Summary
Test Method A, Aperture Test, in. H2O
Average
Standard Deviation,
Within Laboratories
Sr
Coefficient of Variance
%
Reproducibility,
Between Laboratories
SR
Coefficient of Variance
%
Open package 49.11 3.67 7.47 6.39 13.01
Closed package 50.81 3.29 6.48 6.81 13.40
Test Method A, Aperture Test, kPa
Open package 12.23 0.91 7.47 1.59 13.01
Closed package 12.65 0.82 6.48 1.70 13.40
TABLE 2 Precision Summary
Test Method A, Pressurization/Hold Test
Samples
Evaluated
Samples
Passing
Percent
Passing
Open pouch 32 30 93
Closed pouch 32 26 81
F1140/F1140M − 13
4
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F1140/F1140M − 13
5
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