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ASTM F2251-03

(Test Method)

Standard Test Method for Thickness Measurement of Flexible Packaging Material

Standard Test Method for Thickness Measurement of Flexible Packaging Material

SCOPE
1.1 This test method covers the measurement of thickness of flexible packaging materials using contact micrometers.
1.2 The Precision and Bias statement for this test method was developed using both handheld and bench top micrometers with foot sizes ranging from 4.8 to 15.9 mm (3/16 to 5/8 in.).
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.

General Information

Status
Historical
Publication Date
09-Jun-2003
ICS
55.040 - Packaging materials and accessories
Technical Committee
F02 - Primary Barrier Packaging
Current Stage
Ref Project

Relations

Replaced By
ASTM F2251-03e1 - Standard Test Method for Thickness Measurement of Flexible Packaging Material
Effective Date
10-Jun-2003
Referred By
ASTM F1306-21 - Standard Test Method for Slow Rate Penetration Resistance of Flexible Barrier Films and Laminates
Effective Date
10-Jun-2003
Referred By
ASTM F99-21 - Standard Guide for Writing a Specification for Flexible Barrier Rollstock Materials
Effective Date
10-Jun-2003
Referred By
ASTM F2097-20 - Standard Guide for Design and Evaluation of Primary Flexible Packaging for Medical Products
Effective Date
10-Jun-2003
Referred By
ASTM F3300-23 - Standard Test Method for Abrasion Resistance of Flexible Packaging Films Using a Reciprocating Weighted Stylus
Effective Date
10-Jun-2003

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ASTM F2251-03 - Standard Test Method for Thickness Measurement of Flexible Packaging Material
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F 2251 – 03
Standard Test Method for
Thickness Measurement of Flexible Packaging Material
This standard is issued under the fixed designation F 2251; 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 3.1.1 bench micrometer—tabletop measurement system us-
ing a dead weight or spring.
1.1 This test method covers the measurement of thickness of
3.1.2 foot—the moving component of the micrometer that
flexible packaging materials using contact micrometers.
comes in contact with the sample.
1.2 The Precision and Bias statement for this test method
was developed using both handheld and bench top micrometers
4. Significance and Use
3 5
with foot sizes ranging from 4.8 to 15.9 mm ( ⁄16 to ⁄8 in.).
4.1 This test method provides a means for measuring a
1.3 This standard does not purport to address all of the
thickness dimension. Accurate measurement of thickness can
safety concerns, if any, associated with its use. It is the
be critical to meeting specifications and characterizing process,
responsibility of the user of this standard to establish appro-
product, and material performance.
priate safety and health practices and determine the applica-
4.2 This test method does not address acceptability criteria.
bility of regulatory limitations prior to use.
These need to be jointly determined by the user and producer
2. Referenced Documents of the product. Repeatability and reproducibility of measure-
ment is shown in the Precision and Bias section. Attention
2.1 ASTM Standards:
should be given to the inherent variability of materials being
D 374 Test Methods for Thickness of Solid Electrical Insu-
measured as this can affect measurement outcome.
lation
D 1898 Practice for Sampling of Plastics
5. Apparatus
D 4332 Practice for Conditioning Containers, Packages or
5.1 Mechanical gage, suitable for measuring thickness:
Packaging Components for Testing
5.1.1 The thickness gage may be either a bench or hand-held
D 5947 Test Method for Physical Dimensions of Solid
mechanical model.
Plastics Specimens
5.1.2 The gage should be capable of accurately measuring in
E 691 Practice for Conducting an Interlaboratory Study to
6 increments of 2.5 μm (0.0001 in.).
Determine the Precision of a Test Method
7 5.1.3 The foot size and foot pressure should be known and
2.2 ANSI/ASQ Standards:
identified. Because of the compressibility of different materials
ANSI/ASQC Z1.4 Sampling Procedures and Tables for
it is important when comparing results between different
Inspection by Attributes
laboratories that the size of the foot and pressure be the same.
ANSI/ASQC Z1.9 Sampling Procedures and Tables for
Inspection by Variables
3. Terminology
3.1 Definitions:
This test method is under the jurisdiction of ASTM Committee F02 on Flexible
Barrier Materials and is the direct responsibility of Subcommittee F02.60 on
Medical Device Packaging.
Current edition approved June 10, 2003. Published August 2003.
Annual Book of ASTM Standards, Vol 10.01.
Discontinued 1998. See 1997 Annual Book of ASTM Standards, Vol 08.01.
Annual Book of ASTM Standards, Vol 15.09.
Annual Book of ASTM Standards, Vol 08.03.
Annual Book of ASTM Standards, Vol 14.02.
Available from American National Standards Instititute (ANSI) 25 W. 43rd St.,
4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F2251–03
TABLE 2 Summary of Interlaboratory Results by Measurement Set
Repeatability, Reproducibility, 95 % Repeatability, 95 % Reproducibility,
Avg Thickness
Std Dev, s Std Dev, s Limit, r Limit, R
r R
Part
mm mils mm mils mm mils mm mils mm mils
G: 0.48 mil PET 0.012954 0.5100 0.001008 0.0397 0.002197 0.0865 0.00282 0.1111 0.006152 0.2422
A: 2 mil PE 0.053679 2.1133 0.000881 0.0347 0.002691 0.1059 0.00247 0.0971 0.007534 0.2966
B: 2.5 mil PET/PE 0.06405 2.5217 0.000489 0.0192 0.001915 0.0754 0.00137 0.0539 0.005361 0.2111
H: 2.94 mil Calibration Feeler Gage 0.074083 2.9167 0.001316 0.0518 0.00152 0.0598 0.00369 0.1451 0.004255 0.1675
F: 42# Uncoated Medical Paper 0.090678 3.5700 0.000733 0.0289 0.001943 0.0765 0.00205 0.0808 0.00544 0.2142
D: 4.2 mil PET/PE/FOIL/PE 0.10994 4.3283 0.000811 0.0319 0.001966 0.0774 0.00227 0.0894 0.005505 0.2167
E: Uncoated 1073B Tyvek 0.143722 5.6583 0.00164 0.0645 0.009781 0.3851 0.00459 0.1807 0.027387 1.0782
C: 10 mil EVA/SURLYN/EVA 0.260181 10.2433 0.001222 0.0481 0.002596 0.1022 0.00342 0.1347 0.007268 0.2862
Average 0.001069 0.0421 0.004001 0.1575 0.00299 0.1178 0.011204 0.4411
TABLE 3 Summary of Interlaboratory Averaged Results
and smooth without wrinkles, creases or folds. Material should
Repeatability (within a laboratory) 0.001069 mm (0.0421 mils) not be under tension when measured.
standard deviation (s )
r
8.5 Release foot and allow reading to stabilize.
95 % repeatability limit (r) 0.00299 mm (0.1178 mils)
8.6 Read thickness on gauge readout or face.
Reproducibility (between laboratories) 0.004001 mm (0.1575 mils)
standard deviation (s )
R
95 % reproducibility limit (R) 0.011204 mm
...

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4.1 This test method provides a means for measuring a thickness dimension. Accurate measurement of thickness can be critical to meeting specifications and characterizing process, product, and material performance.  
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SIGNIFICANCE AND USE
4.1 This test method is valuable in the development and selection of flexible barrier materials suited for use as grease barriers.  
4.2 The test is rapid in comparison with other methods because of the extremely small quantity of oil required for detection (about 6 μg). The actual time to failure is a multiple of the values obtained by this test method. When permeation is through an absorbent structure such as kraft paper coated with polyethylene, the failure times will be longer and variable, depending on the variation in porosity and thickness of the structure.
SCOPE
1.1 This test method provides standard conditions for determining the rate of grease penetration of flexible barrier materials. Pinholes, which can be measured by a separate test, will increase the rate of grease penetration as determined by this test method.  
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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.

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