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ASTM D3079-94(2003)

(Test Method)

Standard Test Method for Water Vapor Transmission of Flexible Heat-Sealed Packages for Dry Products

Standard Test Method for Water Vapor Transmission of Flexible Heat-Sealed Packages for Dry Products

SIGNIFICANCE AND USE
This test method determines the water vapor barrier properties of the package. With proper precautions and background experience, reproducible results can be obtained to aid in the selection of proper package materials required to provide the product shelf-life desired. This test method may be used to establish a performance specification.
SCOPE
1.1 This test method covers the determination of the amount of water vapor transmission for flexible heat-sealed packages under specified conditions of exposure.
Note 1—Adequate heat-seal efficiency should be determined prior to this test method.
1.2 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
14-Nov-1994
ICS
55.040 - Packaging materials and accessories
Technical Committee
F02 - Primary Barrier Packaging
Drafting Committee
F02.10 - Permeation
Current Stage
Ref Project

Relations

Replaces
ASTM D3079-94(1999) - Standard Test Method for Water Vapor Transmission of Flexible Heat-Sealed Packages for Dry Products
Effective Date
15-Nov-1994
Replaced By
ASTM D3079-94(2009)e1 - Standard Test Method for Water Vapor Transmission of Flexible Heat-Sealed Packages for Dry Products (Withdrawn 2018)
Effective Date
01-May-2009
Referred By
ASTM F2902-16e1 - Standard Guide for Assessment of Absorbable Polymeric Implants
Effective Date
15-Nov-1994
Referred By
ASTM F2097-20 - Standard Guide for Design and Evaluation of Primary Flexible Packaging for Medical Products
Effective Date
15-Nov-1994

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ASTM D3079-94(2003) - Standard Test Method for Water Vapor Transmission of Flexible Heat-Sealed Packages for Dry ProductsASTM D3079-94(2003) - Standard Test Method for Water Vapor Transmission of Flexible Heat-Sealed Packages for Dry Products
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ASTM D3079-94(2003) - Standard Test Method for Water Vapor Transmission of Flexible Heat-Sealed Packages for Dry Products
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D3079–94(Reapproved 2003)
Standard Test Method for
Water Vapor Transmission of Flexible Heat-Sealed Packages
for Dry Products
This standard is issued under the fixed designation D 3079; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope relative humidity for at least 1 month. Measurements of mass
are taken at intervals to determine the average rate of mass
1.1 Thistestmethodcoversthedeterminationoftheamount
change. Controls are used to monitor mass gain of package
of water vapor transmission for flexible heat-sealed packages
materials.
under specified conditions of exposure.
NOTE 1—Adequate heat-seal efficiency should be determined prior to 5. Significance and Use
this test method.
5.1 This test method determines the water vapor barrier
1.2 This standard does not purport to address all of the
properties of the package. With proper precautions and back-
safety concerns, if any, associated with its use. It is the
ground experience, reproducible results can be obtained to aid
responsibility of the user of this standard to establish appro-
intheselectionofproperpackagematerialsrequiredtoprovide
priate safety and health practices and determine the applica-
the product shelf-life desired. This test method may be used to
bility of regulatory limitations prior to use.
establish a performance specification.
2. Referenced Documents
6. Apparatus
2.1 ASTM Standards:
6.1 Weighing Balance—Analytical balance accurate to 1
E 691 Practice for Conducting an Interlaboratory Study to
mg.
Determine the Precision of a Test Method
6.2 Test Chamber—A test room or cabinet provided with
conditioned air that is continuously circulated around the
3. Terminology
specimens under test. The conditions in the chamber shall be
3.1 Definition:
such that no condensation occurs on the specimens.
3.1.1 water vapor transmission of a desiccant-filled
7. Materials
package—the increase in mass after exposure to a specified
humid environment (90 6 2 % relative humidity, 100 6 2°F
7.1 Desiccant—Anhydrous calcium chloride in the form of
(37.8 6 1.1°C)). The mass increase may be divided by a time
small lumps is recommended for this test method. This should
unit to give a rate (for example, grams per 30 days). It is
passaNo.8(2.36-mm)sieve,andbefreeoffinesthatwillpass
assumed that this mass increase is due to water vapor trans-
a No. 30 (600-µm) sieve. The desiccant should be dried for at
mission (through the package) from the test environment to the
least 24 h at 200°C prior to use.
desiccant.
8. Test Specimens
4. Summary of Test Method
8.1 Test specimens shall be representative of the packages
4.1 Test samples are filled with desiccant and after sealing
being tested, and shall be closed and sealed in the normal
are exposed to 100 6 2°F (37.8 6 1.1°C) and 90 6 2%
manner.
8.2 Review the precision and bias statement to determine
the number of samples required to meet requirements. Gener-
This test method is under the jurisdiction ofASTM Committee F02 on Flexible
Barrier Materials and is the direct responsibility of Subcommittee F02.10 on
ally, three to five samples have been found to be sufficient for
Permeation.
most applications.
Current edition approved Nov. 15, 1994. Published January 1995. Originally
e1 8.3 Each test specimen should be half full of desiccant up to
published as D 3079 – 72. Last previous edition D 3079 – 72 (1984) .
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 100 g of desiccant. If the half-full capacity is greater than 100
contactASTM Customer Service at service@astm.org. ForAnnual Book of ASTM
g of desiccant, the package shall be less than half full, but each
Standards volume information, refer to the standard’s Document Summary page on
shall contain approximately the same quantity of desiccant.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D3079–94 (2003)
8.4 If more than one type of package is tested for compari- at least three successive points in a straight line. The slope of
son purposes, all types should have the same (as close as this portion of the curve will furnish a measure of water vapor
possible) su
...

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5.1 Knowledge of extractives from flexible barrier materials may serve many useful purposes. A test cell constructed as described in this practice may be used for obtaining such data. Another test cell has been found equivalent to the one described in this practice. See the appendix for the source of the alternate cell.  
5.2 United States Federal Regulations 21CFR 176.170 (d)(3), 21CFR 177.1330 (e)(4), 21CFR 177.1360 (b), 21CFR 177.1670 (b), and 21CFR Appendix VI (b) cite this standard practice as the basis for determining the amount of extractables from the surface of a package or multilayer film or modified paper in contact with food. In some cases, it is the only practice defined for this purpose. No alternative detail is given in the regulations for conducting extractions.  
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1.7 The values stated in SI units are to be regarded as the standard.  
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