ASTM D6778-12
(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 and health practices and determine the applicability of regulatory requirements prior to use.
Note 1—This classification system is similar to ISO 9988-1/-2, although the technical content is significantly different.
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Designation: D6778 −12
StandardClassification 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 9988-1/-2,
1. Scope*
although the technical content is significantly different.
1.1 Thisclassificationsystemcoverspolyoxymethylenema-
terials suitable for molding and extrusion. This classification 2. Referenced Documents
system allows for the use of polyoxymethylene plastic mate- 2
2.1 ASTM Standards:
rials that are recycled, reconstituted, recycled-regrind,
D618 Practice for Conditioning Plastics for Testing
recovered, or reprocessed, or combination thereof, provided
D883 Terminology Relating to Plastics
that the requirements as stated in this specification are met. It
D1600 Terminology forAbbreviatedTerms Relating to Plas-
is the responsibility of the supplier and the buyer of recycled,
tics
reconstituted, recycled-regrind, recovered, or reprocessed
D3892 Practice for Packaging/Packing of Plastics
polyoxymethylene plastic materials, or combination thereof, to
D4000 Classification System for Specifying Plastic Materi-
ensure compliance. (See Guide D7209).
als
1.2 The properties included in this standard are those D5630 Test Method for Ash Content in Plastics
required to identify the compositions covered. Other require- D7209 Guide for Waste Reduction, Resource Recovery, and
ments necessary to identify particular characteristics important Use of Recycled Polymeric Materials and Products
to specialized applications are to be specified by using suffixes D6100 SpecificationforExtruded,CompressionMoldedand
as given in Section 5. Injection Molded Polyoxymethylene Shapes (POM)
E29 Practice for Using Significant Digits in Test Data to
1.3 This classification system and subsequent line callout
Determine Conformance with Specifications
(specification) are intended to provide a means of calling out
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2.2 ISO Standards:
plastic materials used in the fabrication of end items or parts.
ISO 75-1 Plastics—Determination of Temperature of De-
It is not intended for the selection of materials. Material
flection under Load—Part 1: General Test Method
selection can be made by those having expertise in the plastic
ISO 75-2 Plastics—Determination of Temperature of De-
field only after careful consideration of the design and the
flection under Load—Part 2: Plastics and Ebonite
performance required of the part, the environment to which it
ISO 179-1 Plastics—Determination of Charpy Impact
will be exposed, the fabrication process to be employed, the
Properties—Part 1: Non-instrumented Impact Test
costsinvolved,andtheinherentpropertiesofthematerialother
ISO 294-1 Plastics—Injection Moulding of Test Specimens
than those covered by this standard.
of Thermoplastic Materials—Part 1: General Principles,
1.4 The values stated in SI units are to be regarded as the
and Moulding of Multipurpose and Bar Test Specimens
standard.
ISO 527-1 Plastics—Determination of Tensile Properties—
1.5 The following precautionary caveat pertains only to the
Part 1: General Principals
test method portion, Section 11, of this classification system. ISO 527-2 Plastics—Determination of Tensile Properties—
This standard does not purport to address all of the safety
Part 2: Test Conditions for Moulding and Extrusion
concerns, if any, associated with its use. It is the responsibility Plastics
of the user of this standard to establish appropriate safety and
ISO 1133 Plastics—Determination of the Melt-Mass Flow
health practices and determine the applicability of regulatory Rate (MFR) and the Melt Volume-Flow Rate (MVR) of
requirements prior to use.
Thermoplastics
1 2
This classification is under the jurisdiction of ASTM Committee D20 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic contactASTM Customer Service at service@astm.org. ForAnnual Book ofASTM
Materials. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved May 1, 2012. Published June 2012. Originally the ASTM website.
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approved in 2002. Last previous edition approved in 2006 as D6778 - 06. DOI: Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/D6778-12. 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at th
...
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:D6778–06
Standard Classification for Polyoxymethylene (POM, Acetal)
Molding and Extrusion MaterialsDesignation: D6778 – 12
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.
1. Scope*
1.1This1.1 This classification system covers polyoxymethylene materials suitable for molding and extrusion. This specification
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 polyoxymeth-
ylene plastic materials, or combination thereof, to ensure compliance. (See Guide D5033D7209).
1.2The1.2 The properties included in this classificationstandard are those required to identify the compositions covered. There
may be other Other requirements necessary to identify particular characteristics important to specialized applications. These
mayapplications are to be specified by using the 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 shouldcan
be made by those having expertise in the plastic field of plastics design 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 classification. 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. , 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 and health practices and determine the applicability of
regulatory requirements prior to use.
NOTE 1—This classification system is similar to ISO 9988-1 and 9988-2/-2, although the technical content is significantly different.
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 D3641Practice for Injection Molding Test Specimens of
Thermoplastic Molding and Extrusion Materials
D3892 Practice for Packaging/Packing of Plastics
D4000 Classification System for Specifying Plastic Materials
D5630 Test Method for Ash Content in Plastics
D5033Guide for Development ofASTM Standards Relating to Recycling and Use of Recycled Plastics 7209 Guide for Waste
Reduction, Resource Recovery, and Use of Recycled Polymeric Materials and Products
D6100 Specification for Extruded, Compression Molded and Injection Molded Polyoxymethylene Shapes (POM)
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
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 Nov.May 1, 2006.2012. Published November 2006.June 2012. Originally approved in 2002. Last previous edition approved in 20052006 as
D6778 - 056. DOI: 10.1520/D6778-06.10.1520/D6778-12.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.ForAnnualBookofASTMStandards
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.
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D6778 – 12
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2.2 ISO Standards
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