ASTM D5672-03
(Test Method)Standard Test Method for Testing Flexible Cellular Materials Measurement of Indentation Force Deflection Using a 25-mm (1-in.) Deflection Technique
Standard Test Method for Testing Flexible Cellular Materials Measurement of Indentation Force Deflection Using a 25-mm (1-in.) Deflection Technique
SIGNIFICANCE AND USE
The 25-mm [1-in.] deflection IFD method is recommended for production screening and quality control on full size cushions only.
Applicable cushion thicknesses to be tested by this test method are only those listed in this test method. Further research and development are required before this test method will be applicable to other cushion thicknesses.
This test method is designed to give a value approximating the 25 % IFD on a 100-mm [4-in.] thick piece of foam when the actual specimen thickness tested is within the ranges listed in the test method. In case of disagreement, the referee method is the IFD procedure in Test Methods D 3574, Test B1. The user of this test method shall establish the correlation between this test method and the referee method.
SCOPE
1.1 This test method covers a screening type quality control test used to determine if flexible polyurethane foam cushions are within the specified grade range for firmness.
1.2 This test method is limited to foams with thicknesses that are 75 mm [3 in.] or greater.
1.3 This test method is based on the fact that the traditional industry standard thickness for Indentation Force Deflection (IFD) is 100 mm [4 in.], and the traditional percent deflection for IFD acceptance and product planning is 25 %. With respect then to these traditional industry conventions, a 25 % deflection on a 100-mm [4-in.] cushion would be 25 mm [1 in.]. Thus, deflecting proper thickness cushions 25 mm [1 in.] will determine if the flexible polyurethane foam is within the specified grade range for 25 % IFD.
1.4 Cushion thicknesses less than 75 mm [3 in.] shall not be tested for IFD using this test method.
1.5 This test method is intended to provide a quick and simple method to screen flexible polyurethane foams for determination of its firmness grade.
1.6 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.
Note 1—ISO 2439 is a similar test, but there are technical differences.
General Information
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Standards Content (Sample)
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Designation: D 5672 – 03
Standard Test Method for
Testing Flexible Cellular Materials Measurement of
Indentation Force Deflection Using a 25-mm [1-in.]
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Deflection Technique
This standard is issued under the fixed designation D 5672; 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* “Flexible Polyurethane Foam Standards and Guidelines,”
Joint Industry Foam Standards and Guidelines Commit-
1.1 This test method covers a screening type quality control
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tee
test used to determine if flexible polyurethane foam cushions
are within the specified grade range for firmness.
3. Terminology
1.2 This test method is limited to foams with thicknesses
3.1 This test method is based on Test Methods D 3574, Test
that are 75 mm [3 in.] or greater.
B . Refer to Test Methods D 3574 for terminology used in this
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1.3 This test method is based on the fact that the traditional
test method.
industry standard thickness for Indentation Force Deflection
(IFD) is 100 mm [4 in.], and the traditional percent deflection
4. Significance and Use
for IFD acceptance and product planning is 25 %.With respect
4.1 The 25-mm [1-in.] deflection IFD method is recom-
then to these traditional industry conventions, a 25 % deflec-
mended for production screening and quality control on full
tion on a 100-mm [4-in.] cushion would be 25 mm [1 in.].
size cushions only.
Thus, deflecting proper thickness cushions 25 mm [1 in.] will
4.2 Applicable cushion thicknesses to be tested by this test
determine if the flexible polyurethane foam is within the
method are only those listed in this test method. Further
specified grade range for 25 % IFD.
research and development are required before this test method
1.4 Cushion thicknesses less than 75 mm [3 in.] shall not be
will be applicable to other cushion thicknesses.
tested for IFD using this test method.
4.3 This test method is designed to give a value approxi-
1.5 This test method is intended to provide a quick and
mating the 25 % IFD on a 100-mm [4-in.] thick piece of foam
simple method to screen flexible polyurethane foams for
when the actual specimen thickness tested is within the ranges
determination of its firmness grade.
listed in the test method. In case of disagreement, the referee
1.6 This standard does not purport to address all of the
method is the IFD procedure in Test Methods D 3574, Test B .
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safety concerns, if any, associated with its use. It is the
The user of this test method shall establish the correlation
responsibility of the user of this standard to establish appro-
between this test method and the referee method.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Apparatus
NOTE 1—ISO 2439 is a similar test, but there are technical differences.
5.1 TheapparatususedfordeterminingIFDinTestMethods
D 3574, Test B is used for this test method.
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2. Referenced Documents
2.1 ASTM Standards: 6. Conditioning
D 3574 Methods of Testing Flexible Cellular Materials—
6.1 The conditioning conditions described in Test Methods
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Slab, Bonded, and Molded Urethane Foams
D 3574 are best used when using this test method; however,
E 691 Practice for Conducting an Interlaboratory Study to
since this method is a screening type test method, precise
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Determine the Precision of a Test Method
conditioning is not always practical.
2.2 Method for IFD, Chapter 4.0,
6.2 IFD is very sensitive to temperature and humidity
conditions, therefore testing samples that have been exposed to
extreme conditions of humidity and temperature shall be
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This test method is under the jurisdiction ofASTM Committee D20 on Plastics
avoided. Simply placing the specimens to be tested into an
and is the direct responsibility of Subcommittee D20.22 on Cellular Materials-
air-conditioned room in the summer or a heated room in the
Plastics and Elastomers.
Current edition approved March 10, 2003. Published April 2003. Originally
approved in 1995. Last previous edition approved in 1995 as D 5672 - 95.
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Annual Book of ASTM Standards, Vol 09.02.
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Annual Book of ASTM Standards, Vol 14.02. Available from AFMA, P.O. Box HP-7, High Point, NC 27261.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D5672–03
winter and allowing them to equilibrate for at least 4 h with the 75 mm [3 in.]. Carry out all other parts of the test as described
cooled or heated room air will alleviate some of the problems
...
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