ASTM F1927-07
(Test Method)Standard Test Method for Determination of Oxygen Gas Transmission Rate, Permeability and Permeance at Controlled Relative Humidity Through Barrier Materials Using a Coulometric Detector
Standard Test Method for Determination of Oxygen Gas Transmission Rate, Permeability and Permeance at Controlled Relative Humidity Through Barrier Materials Using a Coulometric Detector
SIGNIFICANCE AND USE
O2GTR at a given temperature and %RH 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 purchaser and seller have agreed on sampling procedures, standardization procedures, test conditions and acceptance criteria.
SCOPE
1.1 This test method covers a procedure for determination of the rate of transmission of oxygen gas, at steady-state, at a given temperature and %RH level, through film, sheeting, laminates, co-extrusions, or plastic-coated papers or fabrics. This test method extends the common practice dealing with zero humidity or, at best, an assumed humidity. Humidity plays an important role in the oxygen gas transmission rate (O2GTR) of many materials. This test method provides for the determination of oxygen gas transmission rate (O2GTR), the permeance of the film to oxygen gas (PO 2), the permeation coefficient of the film to its thickness (PO 2), and oxygen permeability coefficient (PO2) in the case of homogeneous materials at given temperature and %RH level(s).
1.2 The values stated in SI units are to be regarded as the standard.
1.3 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. Specific precautionary statements are given in Section 9.
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F1927 − 07
StandardTest Method for
Determination of Oxygen Gas Transmission Rate,
Permeability and Permeance at Controlled Relative Humidity
1
Through Barrier Materials Using a Coulometric Detector
This standard is issued under the fixed designation F1927; 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.
1. Scope E104Practice for Maintaining Constant Relative Humidity
by Means of Aqueous Solutions
1.1 This test method covers a procedure for determination
E691Practice for Conducting an Interlaboratory Study to
of the rate of transmission of oxygen gas, at steady-state, at a
Determine the Precision of a Test Method
given temperature and %RH level, through film, sheeting,
laminates, co-extrusions, or plastic-coated papers or fabrics.
3. Terminology
This test method extends the common practice dealing with
zerohumidityor,atbest,anassumedhumidity.Humidityplays 3.1 Definitions:
animportantroleintheoxygengastransmissionrate(O GTR)
3.1.1 oxygen permeability coeffıcient (P"O )—the product
2 2
of many materials. This test method provides for the determi-
of the permeance and the thickness of the film.The permeabil-
nation of oxygen gas transmission rate (O GTR), the per-
ity is meaningful only for homogeneous materials, in which
2
meance of the film to oxygen gas (P'O ), the permeation case it is a property characteristic of the bulk material. This
2
coefficient of the film to its thickness (PO ), and oxygen
quantity should not be used unless the relationship between
2
permeability coefficient (P"O ) in the case of homogeneous thickness and permeance has been verified on tests using
2
materials at given temperature and %RH level(s).
several different thicknesses of the material. The SI unit of
oxygen permeability is the mol/m·s·Pa.The test conditions
1.2 The values stated in SI units are to be regarded as the
(see 3.1.4) must be stated.
standard.
3.1.2 oxygen permeance (P'O )—the ratio of O GTR to the
2 2
1.3 This standard does not purport to address all of the
difference between the partial pressure of O on the two sides
2
safety concerns, if any, associated with its use. It is the
2
ofthefilm.TheSIunitofpermeanceisthemol/m ·s·Pa.The
responsibility of the user of this standard to establish appro-
test conditions (see 3.1.4) must be stated.
priate safety and health practices and determine the applica-
3.1.3 oxygen permeation coeffıcient (PO )—the ratio of
2
bility of regulatory limitations prior to use. Specific precau-
O GTR to the thickness of the film. The SI unit of permeance
2
tionary statements are given in Section 9.
2
is the mol/m ·s·cm. The permeation coefficient is meaning-
ful only for homogeneous materials, in which case it is a
2. Referenced Documents
property characteristic of the bulk material. This quantity
2
2.1 ASTM Standards:
should not be used unless the relationship between thickness
3
D1898Practice for Sampling of Plastics (Withdrawn 1998)
and transmission rate is known.
D3985Test Method for Oxygen Gas Transmission Rate
3.1.4 oxygen transmission rate—at a given temperature and
Through Plastic Film and Sheeting Using a Coulometric
%RH (O GTR), the quantity of oxygen gas passing through a
2
Sensor
unit area of the parallel surfaces of a plastic film per unit time
under the conditions of test. The SI unit of transmission rate is
2
the mol/m ·s. The test conditions, including temperature,
1
ThistestmethodisunderthejurisdictionofASTMCommitteeF02onFlexible
%RH and oxygen partial pressure on both sides of the film
Barrier Packaging and is the direct responsibility of Subcommittee F02.10 on
Permeation. must be stated.
Current edition approved Aug. 1, 2007. Published August 2007. Originally
3.1.5 transmission rate(O GTR)—acommonlyusedmetric
2
approved in 1998. Last previous edition approved in 2004 as F1927–98 (2004).
3 2
unit of O GTR is the cm (STP)/m ·d at one atmosphere
2
DOI: 10.1520/F1927-07.
3
2
pressure differential where: 1 cm (STP) is 44.62 µmol, 1 atm
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
is0.1013MPa,andonedayis86.4×10 s.O GTRinSIunits
2
Standards volume information, refer to the standard’s Document Summary page on
is obtained by multiplying the value in metric units by
the ASTM website.
-10 3
3
5.165×10 or the value in inch-pound units [(cm /STP/100
The last approved version of this historical standard is referenced on
2 -9
www.astm.org. in. ·d)] by 8.005×10 .
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