ASTM F2622-08e1
(Test Method)Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using Various Sensors
Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using Various Sensors
SIGNIFICANCE AND USE
The O2GTR is an important determinant of the packaging protection afforded by barrier materials. It is not, however, the sole determinant, and additional tests, based on experience, must be used to correlate packaging performance with O2GTR. It is suitable as a referee method of testing, provided that the purchaser and the seller have agreed on sampling procedures, standardization procedures, test conditions, and acceptance criteria.
Testing which has compared select instruments with other sensors to the instruments specifically described in Test Method D 3985 is shown in Section 16, Precision and Bias, of this method.
The Precision and Bias section of this method shows results using several instruments with non-coulometric and coulometric sensors.
SCOPE
1.1 This test method covers a procedure for determination of the steady-state rate of transmission of oxygen gas through plastics in the form of film, sheeting, laminates, coextrusions, or plastic-coated papers or fabrics. It provides for the determination of (1) oxygen gas transmission rate (O2GTR), (2) the permeance of the film to oxygen gas (PO2), and (3) oxygen permeability coefficient (P'O2) in the case of homogeneous materials.
1.2 This test method does not purport to be the only method for measurement of O2GTR. There may be other methods of O2GTR determination that use other oxygen sensors and procedures.
1.3 This test method has intentionally been prepared to allow for the use of various sensors, devices, and procedures. The precision and bias of each design needs to be individually established to determine the applicability of that instrument or method to meet the needs of the user.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: F2622 − 08
StandardTest Method for
Oxygen Gas Transmission Rate Through Plastic Film and
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Sheeting Using Various Sensors
This standard is issued under the fixed designation F2622; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
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´ NOTE—Research Report information was added editorially in July 2008.
1. Scope 2. Referenced Documents
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2.1 ASTM Standards:
1.1 This test method covers a procedure for determination
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D1898Practice for Sampling of Plastics (Withdrawn 1998)
of the steady-state rate of transmission of oxygen gas through
D3985Test Method for Oxygen Gas Transmission Rate
plastics in the form of film, sheeting, laminates, coextrusions,
Through Plastic Film and Sheeting Using a Coulometric
or plastic-coated papers or fabrics. It provides for the determi-
Sensor
nation of (1) oxygen gas transmission rate (O GTR), (2) the
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permeance of the film to oxygen gas (PO ), and (3) oxygen
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3. Terminology
permeability coefficient (P’O ) in the case of homogeneous
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3.1 Definitions:
materials.
3.1.1 oxygen permeability coeffıcient (P'O )—theproductof
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1.2 Thistestmethoddoesnotpurporttobetheonlymethod
the permeance and the thickness of film. The permeability is
for measurement of O GTR. There may be other methods of
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meaningfulonlyforhomogeneousmaterials,inwhichcaseitis
O GTR determination that use other oxygen sensors and
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a property characteristic of the bulk material. The oxygen
procedures.
permeabilitycoefficientshouldnotbeused,unlesstherelation-
1.3 This test method has intentionally been prepared to ship between thickness and permeance has been verified on
allow for the use of various sensors, devices, and procedures. tests using several different thicknesses of the material. The SI
The precision and bias of each design needs to be individually unit of oxygen permeability is the mol/(m·s·Pa). The test
established to determine the applicability of that instrument or conditions (see 3.1.3) must be stated.
method to meet the needs of the user.
3.1.2 oxygen permeance (PO )—the ratio of the O GTR to
2 2
the difference between the partial pressure of O on the two
1.4 The values stated in SI units are to be regarded as 2
2
sidesofthefilm.TheSIunitofpermeanceisthemol/(m ·s·Pa).
standard. No other units of measurement are included in this
The test conditions (see 15.1) must be stated.
standard.
3.1.3 oxygen transmission rate (O GTR)—the quantity of
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1.5 This standard does not purport to address all of the
oxygen gas passing through a unit area of the parallel surfaces
safety concerns, if any, associated with its use. It is the
of a plastic film per unit time under the conditions of test. The
responsibility of the user of this standard to establish appro-
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SI unit of transmission rate is the mol/(m ·s). The test
priate safety and health practices and determine the applica-
conditions, including temperature and oxygen partial pressure
bility of regulatory limitations prior to use.
on both sides of the film must be stated.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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ThistestmethodisunderthejurisdictionofASTMCommitteeF02onFlexible contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Barrier Packaging and is the direct responsibility of Subcommittee F02.10 on Standards volume information, refer to the standard’s Document Summary page on
Permeation. the ASTM website.
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Current edition approved April 1, 2008. Published May 2008. DOI: 10.1520/ The last approved version of this historical standard is referenced on
F2622-08E01. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F2622 − 08
3.1.3.1 Discussion—AcommonlyusedunitofO GTRisthe 7.1.1.1 O-Ring—Various designs may be included in the
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3 2
cm (STP)/m ·d) at one atmosphere pressure difference where diffusion cell design. Some systems may require vacuum
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1cm (STP) is 44.62 µmol, 1 atm is 0.1013 MPa, and one day greasetoformaproperseal.Thedesignwilldefinethetestarea
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is 86.4 × 10 s. The O GTR in SI units is obtained by of the film as it is tested.
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-10
multiplying the value in inch-pound units by 5.160 × 10 .
7.1.1.2 Diffusion Cell Pneumatic Fittings—The diffusion
cell shall incorporate suitable fittings for the introduction and
4. Summary of Test Method
exhaust of gases without significant loss or leakage.
4.1 Theoxygengastransmissionrateisdeterminedafterthe
7.1.1.3 It is desirable to thermostatically control the diffu-
sample has equilibrated in a controlled te
...
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