ASTM D6338-09
(Classification)Standard Classification System for Highly Crosslinked Thermoplastic Vulcanizates (HCTPVs) Based on ASTM Standard Test Methods
Standard Classification System for Highly Crosslinked Thermoplastic Vulcanizates (HCTPVs) Based on ASTM Standard Test Methods
SCOPE
1.1 This classification system covers highly crosslinked thermoplastic vulcanizates (HCTPVs) for extrusion, molding and other fabrication methods. HCTPVs are thermoplastic elastomers (TPEs) consisting of two or more polymer systems at least one of which is rubbery and highly (>95 %) crosslinked and at least one of which is thermoplastic, with each system having its own phase. The thermoplastic phase will tend to be continuous and the rubbery phase discontinuous. The high level of crosslinking and ultrafine particle size (ca 1 μm diameter) of the rubbery phase give rise to properties more closely approaching those of conventional thermoset rubber, when compared to the same thermoplastic/rubbery polymer composition with a lower level (≤95 %) of crosslinking. The HCTPV polymer compositions may contain fillers, reinforcing agents, plasticizers, resins, antidegradants, colorants and other beneficial constituents. Recycled HCTPVs are not covered in this classification system.
1.2 Included in this classification system are the properties necessary to identify the respective compositions. For specialized applications, other requirements may be needed to identify specific characteristics.
1.3 As given in IEEE/ASTM SI-10, values in SI units are to be regarded as standard.
Note 1—There is no known ISO equivalent to this standard.
1.4 This standard is based on testing completed in accordance with ASTM standard test methods.
1.5 The following safety hazards caveat pertains only to the test methods portion, Section 12, of this classification system. This standard does not purport to address all of the safety problems, 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.
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Designation: D6338 – 09
Standard Classification System for
Highly Crosslinked Thermoplastic Vulcanizates (HCTPVs)
1
Based on ASTM Standard Test Methods
This standard is issued under the fixed designation D6338; 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.
INTRODUCTION
This classification system is intended as a means for the callout of materials for the fabrication of
parts or end-use items. It is not intended for material selection, which should be performed by those
with special expertise in the materials field. Material selection should be made after careful
consideration of: part performance and design; the environment in which the part must function; the
material properties covered and not covered by this classification system; the desired service lifetime
of the part; the fabrication process for the part; and material and fabrication costs.
1. Scope* 1.5 The following safety hazards caveat pertains only to the
test methods portion, Section 12, of this classification system.
1.1 This classification system covers highly crosslinked
This standard does not purport to address all of the safety
thermoplastic vulcanizates (HCTPVs) for extrusion, molding
problems, if any, associated with its use. It is the responsibility
and other fabrication methods. HCTPVs are thermoplastic
of the user of this standard to establish appropriate safety and
elastomers (TPEs) consisting of two or more polymer systems
health practices and determine the applicability of regulatory
atleastoneofwhichisrubberyandhighly(>95 %)crosslinked
limitations prior to use.
and at least one of which is thermoplastic, with each system
having its own phase. The thermoplastic phase will tend to be
2. Referenced Documents
continuous and the rubbery phase discontinuous. The high
2
2.1 ASTM Standards:
level of crosslinking and ultrafine particle size (ca 1 µm
D395 Test Methods for Rubber Property—Compression Set
diameter) of the rubbery phase give rise to properties more
D412 Test Methods for Vulcanized Rubber and Thermo-
closely approaching those of conventional thermoset rubber,
plastic Elastomers—Tension
when compared to the same thermoplastic/rubbery polymer
D471 Test Method for Rubber Property—Effect of Liquids
composition with a lower level (#95 %) of crosslinking. The
D573 Test Method for Rubber—Deterioration in an Air
HCTPV polymer compositions may contain fillers, reinforcing
Oven
agents, plasticizers, resins, antidegradants, colorants and other
D618 Practice for Conditioning Plastics for Testing
beneficial constituents. Recycled HCTPVs are not covered in
D638 Test Method for Tensile Properties of Plastics
this classification system.
D883 Terminology Relating to Plastics
1.2 Included in this classification system are the properties
D1434 Test Method for Determining Gas Permeability
necessary to identify the respective compositions. For special-
Characteristics of Plastic Film and Sheeting
izedapplications,otherrequirementsmaybeneededtoidentify
D1566 Terminology Relating to Rubber
specific characteristics.
D2240 Test Method for Rubber Property—Durometer
1.3 As given in IEEE/ASTM SI-10, values in SI units are to
Hardness
be regarded as standard.
D3182 Practice for Rubber—Materials, Equipment, and
NOTE 1—There is no known ISO equivalent to this standard.
Procedures for Mixing Standard Compounds and Prepar-
ing Standard Vulcanized Sheets
1.4 This standard is based on testing completed in accor-
dance with ASTM standard test methods. D3892 Practice for Packaging/Packing of Plastics
D4000 Classification System for Specifying Plastic Materi-
als
1
This specification is under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
Materials.
2
Current edition approved Sept. 1, 2009. Published September 2009. Originally For referenced ASTM standards, visit the ASTM website, www.astm.org, or
approved in 1998. Last previous edition approved in 2003 as D6338 - 03. DOI: contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
10.1520/D6338-09. Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
*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 ----------------------
D6338 – 09
D6436 Guide for Reporting Properties for Plastics and
A = Table A property requirements,
Thermoplastic Elastomers
4=65 6 5 Shore A hardness, Test Method
D6869 Test Method for Coulometric
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:D6338–03 Designation: D 6338 – 09
Standard Classification System for
Highly Crosslinked Thermoplastic Vulcanizates
(HCTPVs)Highly Crosslinked Thermoplastic Vulcanizates
1
(HCTPVs) Based on ASTM Standard Test Methods
This standard is issued under the fixed designation D 6338; 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.
INTRODUCTION
This classification system is intended as a means for the callout of materials for the fabrication of
parts or end-use items. It is not intended for material selection, which should be performed by those
with special expertise in the materials field. Material selection should be made after careful
consideration of: part performance and design; the environment in which the part must function; the
material properties covered and not covered by this classification system; the desired service lifetime
of the part; the fabrication process for the part; and material and fabrication costs.
1. Scope*
1.1 This classification system covers highly crosslinked thermoplastic vulcanizates (HCTPVs) for extrusion, molding and other
fabrication methods. HCTPVs are thermoplastic elastomers (TPEs) consisting of two or more polymer systems at least one of
whichisrubberyandhighly(>95 %)crosslinkedandatleastoneofwhichisthermoplastic,witheachsystemhavingitsownphase.
The thermoplastic phase will tend to be continuous and the rubbery phase discontinuous. The high level of crosslinking and
ultrafine particle size (ca 1 µm diameter) of the rubbery phase give rise to properties more closely approaching those of
conventional thermoset rubber, when compared to the same thermoplastic/rubbery polymer composition with a lower level
(#95 %) of crosslinking. The HCTPV polymer compositions may contain fillers, reinforcing agents, plasticizers, resins,
antidegradants, colorants and other beneficial constituents. Recycled HCTPVs are not covered in this classification system.
1.2 Included in this classification system are the properties necessary to identify the respective compositions. For specialized
applications, other requirements may be needed to identify specific characteristics.
1.3 As given in IEEE/ASTM SI-10, values in SI units are to be regarded as standard.
NOTE1—There is no equivalent ISO standard.
1.4 1—There is no known ISO equivalent to this standard.
1.4 This standard is based on testing completed in accordance with ASTM standard test methods.
1.5 The following safety hazards caveat pertains only to the test methods portion, Section 12, of this classification system. This
standard does not purport to address all of the safety problems, 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D 395 Test Methods for Rubber Property—Compression Set
D 412 Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension
D 471 Test Method for Rubber Property—Effect of Liquids
D 573 Test Method for Rubber—Deterioration in an Air Oven
D 618 Practice for Conditioning Plastics for Testing
D 638 Test Method for Tensile Properties of Plastics
1
This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials.
Current edition approved August 10, 2003. Published October 2003. Originally approved in 1998. Last previous edition approved in 1998 as D6338-98.
Current edition approved Sept. 1, 2009. Published September 2009. Originally approved in 1998. Last previous edition approved in 2003 as D 6338 - 03.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 09.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
*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 ----------------------
D6338–09
D 883 Terminology Relating to Plastics
D 1434 Test Method for Determining Gas Permeability Characteristics of Plastics Plastic Film and
...
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