ASTM D7436-11
(Classification)Standard Classification System for Unfilled Polyethylene Plastics Molding and Extrusion Materials with a Fractional Melt Index Using ISO Protocol and Methodology
Standard Classification System for Unfilled Polyethylene Plastics Molding and Extrusion Materials with a Fractional Melt Index Using ISO Protocol and Methodology
SCOPE
1.1 This classification system provides for the identification of unfilled polyethylene plastics molding and extrusion materials, with a melt index of 1g/10 min, in such a manner that the supplier and the user agree on the acceptability of different commercial lots or shipments. The tests involved in this specification are intended to provide information for identifying materials in accordance with the groups, classes, and grades covered. It is not the function of this classification system to provide specific engineering data for design purposes.
1.2 This classification system allows for the use of recycled polyethylene materials provided that the requirements as stated in this classification system are met. The proportions of recycled material used, as well as the nature and amount of any contaminant, however, will not be covered in this specification.
Note 1—See Guide D7209 for information and definitions related to recycled plastics.
1.3 The properties included in this classification system are those required to identify the compositions covered. There may be other requirements necessary to identify particular characteristics important to specialized applications. These shall be agreed upon between the user and the supplier by using the suffixes given in Section 5.
1.4 This classification system and subsequent line callout (specifications) 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 should be made by those having expertise in the plastic field after careful consideration of the design and the performance requirements 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 system.
1.5 The values stated in SI units are regarded as the standard.
1.6 The following precautionary caveat pertains to the test method portion only, Section 12 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 limitations prior to use.
1.7 For information regarding plastic pipe materials, see Specification D3350. For information regarding wire and cable materials, see Specification D1248. For information regarding classification of PE molding and extrusion materials using ASTM test methods, see Specification D4976.
Note 2—There is no known ISO equivalent to this standard.
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Designation:D7436 −11
StandardClassification System for
Unfilled Polyethylene Plastics Molding and Extrusion
Materials with a Fractional Melt Index Using ISO Protocol
1
and Methodology
This standard is issued under the fixed designation D7436; 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 material specification is intended to provide a callout system for polyethylene utilizing
specimen preparation procedures and test methods based primarily on ISO standards.
1. Scope performance requirements of the part, the environment to
which it will be exposed, the fabrication process to be
1.1 This classification system provides for the identification
employed,thecostsinvolved,andtheinherentpropertiesofthe
of unfilled polyethylene plastics molding and extrusion
material other than those covered by this classification system.
materials, with a melt index of <1g/10 min, in such a manner
that the supplier and the user agree on the acceptability of 1.5 The values stated in SI units are regarded as the
different commercial lots or shipments. The tests involved in standard.
this specification are intended to provide information for
1.6 The following precautionary caveat pertains to the test
identifying materials in accordance with the groups, classes,
method portion only, Section 12 of this classification system.
and grades covered. It is not the function of this classification
This standard does not purport to address all of the safety
system to provide specific engineering data for design pur-
concerns, if any, associated with its use. It is the responsibility
poses.
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
1.2 This classification system allows for the use of recycled
limitations prior to use.
polyethylene materials provided that the requirements as stated
1.7 For information regarding plastic pipe materials, see
in this classification system are met. The proportions of
Specification D3350. For information regarding wire and cable
recycledmaterialused,aswellasthenatureandamountofany
materials, see Specification D1248. For information regarding
contaminant,however,willnotbecoveredinthisspecification.
NOTE 1—See Guide D7209 for information and definitions related to classification of PE molding and extrusion materials using
recycled plastics.
ASTM test methods, see Specification D4976.
NOTE 2—There is no known ISO equivalent to this standard.
1.3 The properties included in this classification system are
thoserequiredtoidentifythecompositionscovered.Theremay
2. Referenced Documents
be other requirements necessary to identify particular charac-
2
2.1 ASTM Standards:
teristics important to specialized applications. These shall be
D883 Terminology Relating to Plastics
agreed upon between the user and the supplier by using the
D1248 Specification for Polyethylene Plastics Extrusion
suffixes given in Section 5.
Materials for Wire and Cable
1.4 This classification system and subsequent line callout
D1600 TerminologyforAbbreviatedTermsRelatingtoPlas-
(specifications) are intended to provide a means of calling out
tics
plastic materials used in the fabrication of end items or parts.
D1693 Test Method for Environmental Stress-Cracking of
It is not intended for the selection of materials. Material
Ethylene Plastics
selection should be made by those having expertise in the
D2565 Practice for Xenon-Arc Exposure of Plastics In-
plastic field after careful consideration of the design and the
tended for Outdoor Applications
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ThisclassificationsystemisunderthejurisdictionofASTMCommitteeD20on
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Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Materials. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Nov. 15, 2011. Published December 2011. Standards volume information, refer to the standard’s Document Summary page on
DOI:10.1520/D7436-11. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D7436−11
D3350 Specification for Polyethylene Plastics Pipe and Fit- 4. Classification
tings Materials
4.1 Unfilled polyethylene plastic materials are classified
D3763 Test Method for High Speed Puncture Properties of
into groups in accordance with molecular structure. These
Plastics Using Load and Displacement Sensors
groups are subdivided into classes and grades as shown in
D
...
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