ASTM D6778-20
(Specification)Standard Classification System and Basis for Specification for Polyoxymethylene Molding and Extrusion Materials (POM)
Standard Classification System and Basis for Specification for Polyoxymethylene Molding and Extrusion Materials (POM)
ABSTRACT
This classification covers polyoxymethylene materials suitable for molding and extrusion. This specification allows for the use of polyoxymethylene plastic materials that are recycled, reconstituted, recycled-regrind, recovered, or reprocessed, or combination thereof, provided that the requirements as stated in this specification are met. Test specimens shall be molded by injection molding and all test pieces shall be tested as molded and conditioned in the standard laboratory atmosphere. The mechanical properties of the unreinforced and reinforced, filled, or lubricated polyoxymethylene materials shall be determined and shall conform to the following requirements: flow rate; melting point; tensile strength; tensile modulus; Charpy impact resistance; and deflection temperature.
SCOPE
1.1 This classification system covers polyoxymethylene materials suitable for molding and extrusion. This classification system allows for the use of polyoxymethylene plastic materials that are recycled, reconstituted, recycled-regrind, recovered, or reprocessed, or combination thereof, provided that the requirements as stated in this specification are met. It is the responsibility of the supplier and the buyer of recycled, reconstituted, recycled-regrind, recovered, or reprocessed polyoxymethylene plastic materials, or combination thereof, to ensure compliance. (See Guide D7209).
1.2 The properties included in this standard are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications are to be specified by using suffixes as given in Section 5.
1.3 This classification system and subsequent line callout (specification) are intended to provide a means of calling out plastic materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection can be made by those having expertise in the plastic field only after careful consideration of the design and the performance required of the part, the environment to which it will be exposed, the fabrication process to be employed, the costs involved, and the inherent properties of the material other than those covered by this standard.
1.4 The values stated in SI units are to be regarded as the standard.
1.5 The following precautionary caveat pertains only to the test method portion, Section 11, of this classification system. 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 classification system is similar to ISO 29988-1/-2, although the technical content is significantly different.
1.6 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: D6778 −20
Standard Classification System and Basis for Specification for
1
Polyoxymethylene Molding and Extrusion Materials (POM)
This standard is issued under the fixed designation D6778; 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.
NOTE 1—This classification system is similar to ISO 29988-1/-2,
1. Scope*
although the technical content is significantly different.
1.1 Thisclassificationsystemcoverspolyoxymethylenema-
1.6 This international standard was developed in accor-
terials suitable for molding and extrusion. This classification
dance with internationally recognized principles on standard-
system allows for the use of polyoxymethylene plastic mate-
ization established in the Decision on Principles for the
rials that are recycled, reconstituted, recycled-regrind,
Development of International Standards, Guides and Recom-
recovered, or reprocessed, or combination thereof, provided
mendations issued by the World Trade Organization Technical
that the requirements as stated in this specification are met. It
Barriers to Trade (TBT) Committee.
is the responsibility of the supplier and the buyer of recycled,
reconstituted, recycled-regrind, recovered, or reprocessed
2. Referenced Documents
polyoxymethylene plastic materials, or combination thereof, to
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2.1 ASTM Standards:
ensure compliance. (See Guide D7209).
D618 Practice for Conditioning Plastics for Testing
1.2 The properties included in this standard are those
D883 Terminology Relating to Plastics
required to identify the compositions covered. Other require-
D1600 Terminology forAbbreviatedTerms Relating to Plas-
ments necessary to identify particular characteristics important
tics
to specialized applications are to be specified by using suffixes
D3892 Practice for Packaging/Packing of Plastics
as given in Section 5.
D4000 Classification System for Specifying Plastic Materi-
als
1.3 This classification system and subsequent line callout
(specification) are intended to provide a means of calling out D5630 Test Method for Ash Content in Plastics
D7209 Guide for Waste Reduction, Resource Recovery, and
plastic materials used in the fabrication of end items or parts.
It is not intended for the selection of materials. Material Use of Recycled Polymeric Materials and Products (With-
3
selection can be made by those having expertise in the plastic drawn 2015)
D6100 SpecificationforExtruded,CompressionMoldedand
field only after careful consideration of the design and the
performance required of the part, the environment to which it Injection Molded Polyoxymethylene Shapes (POM)
E29 Practice for Using Significant Digits in Test Data to
will be exposed, the fabrication process to be employed, the
costsinvolved,andtheinherentpropertiesofthematerialother Determine Conformance with Specifications
4
than those covered by this standard. 2.2 ISO Standards:
ISO 75-1 Plastics—Determination of Temperature of De-
1.4 The values stated in SI units are to be regarded as the
flection under Load—Part 1: General Test Method
standard.
ISO 75-2 Plastics—Determination of Temperature of De-
1.5 The following precautionary caveat pertains only to the
flection under Load—Part 2: Plastics and Ebonite
test method portion, Section 11, of this classification system.
ISO 179-1 Plastics—Determination of Charpy Impact
This standard does not purport to address all of the safety
Properties—Part 1: Non-instrumented Impact Test
concerns, if any, associated with its use. It is the responsibility
ISO 294-1 Plastics—Injection Moulding of Test Specimens
of the user of this standard to establish appropriate safety,
of Thermoplastic Materials—Part 1: General Principles,
health, and environmental practices and determine the appli-
cability of regulatory limitations prior to use.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contactASTM Customer Service at service@astm.org. ForAnnual Book ofASTM
1
This classification is under the jurisdiction of ASTM Committee D20 on Standards volume information, refer to the standard’s Document Summary page on
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic the ASTM website.
3
Materials. The last approved version of this historical standard is referenced on
Current edition approved Feb. 1, 2020. Published March 2020. Originally www.astm.org.
4
approved in 2002. Las
...
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: D6778 − 14 D6778 − 20
Standard Classification System and Basis for Specification for
1
Polyoxymethylene Molding and Extrusion Materials (POM)
This standard is issued under the fixed designation D6778; 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 classification system covers polyoxymethylene materials suitable for molding and extrusion. This classification system
allows for the use of polyoxymethylene plastic materials that are recycled, reconstituted, recycled-regrind, recovered, or
reprocessed, or combination thereof, provided that the requirements as stated in this specification are met. It is the responsibility
of the supplier and the buyer of recycled, reconstituted, recycled-regrind, recovered, or reprocessed polyoxymethylene plastic
materials, or combination thereof, to ensure compliance. (See Guide D7209).
1.2 The properties included in this standard are those required to identify the compositions covered. Other requirements
necessary to identify particular characteristics important to specialized applications are to be specified by using suffixes as given
in Section 5.
1.3 This classification system and subsequent line callout (specification) are intended to provide a means of calling out plastic
materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection can be
made by those having expertise in the plastic field only after careful consideration of the design and the performance required of
the part, the environment to which it will be exposed, the fabrication process to be employed, the costs involved, and the inherent
properties of the material other than those covered by this standard.
1.4 The values stated in SI units are to be regarded as the standard.
1.5 The following precautionary caveat pertains only to the test method portion, Section 11, of this classification system. 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 requirementslimitations prior to use.
NOTE 1—This classification system is similar to ISO 9988-1/-2,29988-1/-2, although the technical content is significantly different.
1.6 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
D1600 Terminology for Abbreviated Terms Relating to Plastics
D3892 Practice for Packaging/Packing of Plastics
D4000 Classification System for Specifying Plastic Materials
D5630 Test Method for Ash Content in Plastics
D7209 Guide for Waste Reduction, Resource Recovery, and Use of Recycled Polymeric Materials and Products (Withdrawn
3
2015)
D6100 Specification for Extruded, Compression Molded and Injection Molded Polyoxymethylene Shapes (POM)
1
This classification 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 Aug. 1, 2014Feb. 1, 2020. Published September 2014March 2020. Originally approved in 2002. Last previous edition approved in 20122014
as D6778 - 12.D6778 - 14. DOI: 10.1520/D6778-14.10.1520/D6778-20.
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
The last approved version of this historical standard is referenced on www.astm.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
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