ASTM D3748-14(2019)
(Practice)Standard Practice for Evaluating High-Density Rigid Cellular Plastics
Standard Practice for Evaluating High-Density Rigid Cellular Plastics
ABSTRACT
This practice covers the basic test procedures for the determination of the physical properties and the reporting of data for high-density rigid cellular plastics. Samples shall be prepared by either processing samples directly into proper size specimens, or by preparing samples from larger sections as specified in each individual test. Since cellular plastics are often nonuniform in density distribution, a minimum of five specimens shall, therefore, be tested per testing method to obtain representative values. The test methods covered here are to examine the following material properties: apparent density; compressive strength; tensile properties; coefficient of linear thermal expansion; apparent flexural properties; deflection temperature; dielectric breakdown voltage and dielectric strength; thermal conductivity; and water absorption rate.
SCOPE
1.1 This practice covers the basic test procedures for determination of the physical properties and reporting of data for high-density rigid cellular plastics.
1.2 The values stated in SI units are to be regarded as 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 standard and ISO 9054 address the same subject matter, but differ in technical content.
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.
General Information
Relations
Standards Content (Sample)
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: D3748 − 14 (Reapproved 2019)
Standard Practice for
Evaluating High-Density Rigid Cellular Plastics
This standard is issued under the fixed designation D3748; 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* D648Test Method for Deflection Temperature of Plastics
Under Flexural Load in the Edgewise Position
1.1 This practice covers the basic test procedures for deter-
D695Test Method for Compressive Properties of Rigid
mination of the physical properties and reporting of data for
Plastics
high-density rigid cellular plastics.
D696TestMethodforCoefficientofLinearThermalExpan-
1.2 The values stated in SI units are to be regarded as
sion of Plastics Between −30°C and 30°C with a Vitreous
standard.
Silica Dilatometer
1.3 This standard does not purport to address all of the D790Test Methods for Flexural Properties of Unreinforced
safety concerns, if any, associated with its use. It is the
and Reinforced Plastics and Electrical Insulating Materi-
responsibility of the user of this standard to establish appro- als
priate safety, health, and environmental practices and deter-
D883Terminology Relating to Plastics
mine the applicability of regulatory limitations prior to use. D1622/D1622MTest Method forApparent Density of Rigid
Cellular Plastics
NOTE 1—This standard and ISO9054 address the same subject matter,
but differ in technical content.
3. Terminology
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard- 3.1 Definitions:
3 3
ization established in the Decision on Principles for the
3.1.1 high density—greater than 320 kg/m (0.32 g/cm)or
Development of International Standards, Guides and Recom-
20 lb/ft apparent density.
mendations issued by the World Trade Organization Technical
3.1.2 For definitions of other terms used in this practice,
Barriers to Trade (TBT) Committee.
refer to Terminology D883.
2. Referenced Documents
4. Significance and Use
2.1 ASTM Standards:
4.1 This practice provides appropriate testing methods, and
C177Test Method for Steady-State Heat Flux Measure-
a specific data reporting procedure for high-density rigid
ments and Thermal Transmission Properties by Means of
cellular plastics.
the Guarded-Hot-Plate Apparatus
C518Test Method for Steady-State Thermal Transmission
5. Sample Preparation
Properties by Means of the Heat Flow Meter Apparatus
D149Test Method for Dielectric Breakdown Voltage and
5.1 Prepare samples in one of two ways:
DielectricStrengthofSolidElectricalInsulatingMaterials
(a)process samples directly into proper size specimens, or
at Commercial Power Frequencies
(b)prepare samples from larger sections as specified in
D570Test Method for Water Absorption of Plastics
each individual test.
D618Practice for Conditioning Plastics for Testing
5.2 Report the precise manner of sample preparation.
D638Test Method for Tensile Properties of Plastics
6. Conditioning
ThispracticeisunderthejurisdictionofASTMCommitteeD20onPlasticsand
6.1 Condition specimens prior to testing in accordance with
is the direct responsibility of Subcommittee D20.22 on Cellular Materials - Plastics
and Elastomers. Procedure A of Practice D618.
Current edition approved April 1, 2019. Published May 2019. Originally
approved in 1978. Last previous edition approved in 2014 as D3748–14. DOI:
7. Number of Test Specimens
10.1520/D3748-14R19.
For referenced ASTM standards, visit the ASTM Web Site, www.astm.org, or
7.1 Cellular plastics ar
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