ASTM E171/E171M-11(2020)
(Practice)Standard Practice for Conditioning and Testing Flexible Barrier Packaging
Standard Practice for Conditioning and Testing Flexible Barrier Packaging
ABSTRACT
This specification defines the standard temperature and humidity for conditioning and testing of materials at nominally ambient conditions. Materials for conditioning and testing include material containing paper and plastic material. The instruments and techniques used to measure these standard conditions of temperature and humidity must be validated.
SIGNIFICANCE AND USE
4.1 Conditioning is used to minimize the variation in test results that may result from fluctuations in temperature and humidity, or both. Many flexible packaging materials or components of flexible packaging materials, particularly materials that are hygroscopic, undergo changes in physical properties as the temperature and the relative humidity (RH) to which they are exposed are varied.
4.2 Many packaging materials do not exhibit a meaningful change in physical properties across the temperature and humidity range that is generally found in office and general laboratory settings. As a result, conditioning of samples is often not required in order to achieve useful test results and is often bypassed during routine testing.
4.3 Conditioning should be considered when (a) comparing between or among laboratory results (for example, supplier and customer), (b) temperature or humidity is anticipated to have an effect on the test outcomes, or (c) potential sources of variation in test results must be minimized.
4.4 Temperature and humidity alone are not sufficient to completely define a storage condition. Many other factors may be relevant (such as time, light, and atmospheric pressure) that are not defined in this specification.
SCOPE
1.1 This practice defines the standard temperature and humidity for conditioning and testing of flexible barrier packaging and flexible barrier packaging materials at nominally ambient conditions.
1.2 There are many other temperature and humidity conditions that may be appropriately used to test end use conditions (such as freezer, refrigerated, or abusive storage). These need to be individually established and are not in the scope of this practice.
1.3 Only those materials that fall under the general area of flexible barrier packaging materials are included in this practice.
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 international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E171/E171M − 11 (Reapproved 2020)
Standard Practice for
Conditioning and Testing Flexible Barrier Packaging
This standard is issued under the fixed designation E171/E171M; 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 3. Terminology
1.1 This practice defines the standard temperature and 3.1 conditioning—the exposure of a material to the influ-
humidity for conditioning and testing of flexible barrier pack- ence of a prescribed atmosphere for a stipulated period of time
aging and flexible barrier packaging materials at nominally or until a stipulated relation is reached between material and
ambient conditions. atmosphere.
1.2 There are many other temperature and humidity condi- 3.2 Terms and definitions used in this practice may be found
tions that may be appropriately used to test end use conditions in Terminology F17.
(such as freezer, refrigerated, or abusive storage). These need
to be individually established and are not in the scope of this 4. Significance and Use
practice.
4.1 Conditioning is used to minimize the variation in test
1.3 Only those materials that fall under the general area of results that may result from fluctuations in temperature and
flexible barrier packaging materials are included in this prac- humidity, or both. Many flexible packaging materials or
tice. components of flexible packaging materials, particularly ma-
terials that are hygroscopic, undergo changes in physical
1.4 The values stated in either SI units or inch-pound units
properties as the temperature and the relative humidity (RH) to
are to be regarded separately as standard. The values stated in
which they are exposed are varied.
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining 4.2 Many packaging materials do not exhibit a meaningful
values from the two systems may result in non-conformance change in physical properties across the temperature and
with the standard. humidity range that is generally found in office and general
laboratorysettings.Asaresult,conditioningofsamplesisoften
1.5 This international standard was developed in accor-
not required in order to achieve useful test results and is often
dance with internationally recognized principles on standard-
bypassed during routine testing.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4.3 Conditioning should be considered when (a) comparing
mendations issued by the World Trade Organization Technical
between or among laboratory results (for example, supplier and
Barriers to Trade (TBT) Committee.
customer), (b) temperature or humidity is anticipated to have
an effect on the test outcomes, or (c) potential sources of
2. Referenced Documents
variation in test results must be minimized.
2.1 ASTM Standards:
4.4 Temperature and humidity alone are not sufficient to
D4332 Practice for
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