Standard Test Method for Apparent Density of Rigid Cellular Plastics

SIGNIFICANCE AND USE
4.1 If the material to be tested includes forming skins, the apparent overall density, or the apparent core density, or both, shall be determined. If the material does not have forming skins, the term overall density is not applicable.  
4.2 This test method is also applicable to spray foam materials.  
4.3 Before proceeding with this test method, reference shall be made to the specification of the material being tested. Any test specimen preparation, conditioning, dimensions, or testing parameters, or combination thereof, covered in the relevant ASTM materials specification shall take precedence over those mentioned in this test method. If there are no relevant ASTM material specifications, then the default conditions in this method apply.  
4.4 When density or apparent density is used in reference to a cellular plastic, without further qualification, it shall be interpreted as follows:  
4.4.1 density—shall be interpreted as being the apparent overall density if the material is to be used with forming skins intact.  
4.4.2 density—shall be interpreted as the apparent core density if the forming skins have been, or will be, removed before the material is used.
SCOPE
1.1 This test method covers the density of a cellular plastic. Density can be evaluated as the apparent overall density (includes forming skins) or by apparent core density (forming skins removed).  
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: This test method is equivalent to ISO 845.  
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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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.
Designation: D1622 − 20
Standard Test Method for
1
Apparent Density of Rigid Cellular Plastics
This standard is issued under the fixed designation D1622; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 2.2 ISO Standard:
ISO 845 Cellular plastics and rubbers—Determination of
1.1 This test method covers the density of a cellular plastic.
3
apparent density
Density can be evaluated as the apparent overall density
(includes forming skins) or by apparent core density (forming
3. Terminology
skins removed).
3.1 Terms used in this standard are defined in accordance
1.2 The values stated in SI units are to be regarded as
with Terminology D883, unless otherwise specified. For terms
standard. The values given in parentheses are mathematical
relating to precision and bias and associated issues, the terms
conversions to inch-pound units that are provided for informa-
used in this standard are defined in accordance with Terminol-
tion only and are not considered standard.
ogy E456.
1.3 This standard does not purport to address all of the
3.2 Definitions of Terms Specific to This Standard:
safety concerns, if any, associated with its use. It is the
3.2.1 apparent core density (of a cellular plastic), n—the
responsibility of the user of this standard to establish appro-
weight in air per unit volume of a sample, after all forming
priate safety, health, and environmental practices and deter-
skins formed during the manufacturing process have been
mine the applicability of regulatory limitations prior to use.
removed.
NOTE 1—This test method is equivalent to ISO 845.
3.2.2 apparent overall density (of a cellular plastic), n—the
1.4 This international standard was developed in accor-
weightinairperunitvolumeofasample,includingallforming
dance with internationally recognized principles on standard-
skins formed during the manufacturing process.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Significance and Use
mendations issued by the World Trade Organization Technical
4.1 If the material to be tested includes forming skins, the
Barriers to Trade (TBT) Committee.
apparent overall density, or the apparent core density, or both,
shall be determined. If the material does not have forming
2. Referenced Documents
skins, the term overall density is not applicable.
2
2.1 ASTM Standards:
4.2 This test method is also applicable to spray foam
D618 Practice for Conditioning Plastics for Testing
materials.
D883 Terminology Relating to Plastics
4.3 Before proceeding with this test method, reference shall
E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Study to be made to the specification of the material being tested. Any
test specimen preparation, conditioning, dimensions, or testing
Determine the Precision of a Test Method
E2935 Practice for Conducting Equivalence Testing in parameters, or combination thereof, covered in the relevant
ASTM materials specification shall take precedence over those
Laboratory Applications
mentioned in this test method. If there are no relevant ASTM
material specifications, then the default conditions in this
1
method apply.
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
and is the direct responsibility of Subcommittee D20.22 on Cellular Materials -
4.4 When density or apparent density is used in reference to
Plastics and Elastomers.
a cellular plastic, without further qualification, it shall be
Current edition approved July 15, 2020. Published July 2020. Originally
approved in 1959. Last previous edition approved in 2014 as D1622/D1622M - 14.
interpreted as follows:
DOI: 10.1520/D1622-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contactASTM Customer Service at service@astm.org. ForAnnual Book ofASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
*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
1

---------------------- Page: 1 ----------------------
D1622 − 20
4.4.1
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D1622/D1622M − 14 D1622 − 20
Standard Test Method for
1
Apparent Density of Rigid Cellular Plastics
This standard is issued under the fixed designation D1622/D1622M;D1622; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This test method covers the density of a cellular plastic. Density can be evaluated as the apparent overall density (includes
forming skins) or by apparent core density (forming skins removed).
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values statedgiven
in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, and values from the two systems shall not be combined.parentheses are mathematical conversions to
inch-pound units that are provided for information only and are not considered 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
NOTE 1—This test method is equivalent to ISO 845.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
D883 Terminology Relating to Plastics
E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E2935 Practice for Conducting Equivalence Testing in Laboratory Applications
2.2 ISO Standard:
ISO 845 Cellular Plasticsplastics and Rubbers—Determination of Apparent (Bulk) Densityrubbers—Determination of apparent
3
density
3. Terminology
3.1 Terms used in this standard are defined in accordance with Terminology D883For definitions of terms associated with plastic
materials, see , unless otherwise specified. For terms relating to precision and bias and associated issues, the terms used in this
standard are defined in accordance with Terminology D883E456.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 apparent core density (of a cellular plastic)—plastic), n—the weight in air per unit volume of a sample, after all forming
skins formed during the manufacturing process have been removed.
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.22 on Cellular Materials - Plastics
and Elastomers.
Current edition approved April 1, 2014July 15, 2020. Published May 2014July 2020. Originally approved in 1959. Last previous edition approved in 20082014 as
D1622 - 08.D1622/D1622M - 14. DOI: 10.1520/D1622-14.10.1520/D1622-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*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
1

---------------------- Page: 1 ----------------------
D1622 − 20
3.2.2 apparent overall density (of a cellular plastic)—plastic), n—the weight in air per unit volume of a sample, including all
forming skins.skins formed during the manufacturing process.
4. Significance and Use
4.1 If the material to be tested includes forming skins, the apparent overall density, or the apparent core density, or both, shall
be determined. If the material does not have forming skins, the term overall density is not applicable.
4.2 This test method is also applicab
...

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