ASTM D4976-06
(Specification)Standard Specification for Polyethylene Plastics Molding and Extrusion Materials
Standard Specification for Polyethylene Plastics Molding and Extrusion Materials
ABSTRACT
This specification provides the standard requirements for polyethylene plastic molding and extrusion materials. The tests involved in this specification are intended to provide information for identifying materials in accordance with the groups, classes, and grades covered. Polyethylene plastic materials are classified into two groups in accordance with the molecular structure which may be branched or linear. Test specimens shall be compression molded, conditioned in a standard or controlled laboratory atmosphere, and tested to determine the materials' physical and electrical properties. The specimens shall comply with the following requirements: flow rate; density; tensile stress at yield; nominal strain at break; secant flexural modulus; environmental stress-crack resistance; slow crack growth resistance; thermal stress crack resistance; permittivity; dissipation factor; volume resistivity; water immersion stability; flammability; and weatherability.
SCOPE
1.1 This specification provides for the identification of polyethylene plastics molding and extrusion materials in such a manner that the supplier and the user can 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 specification to provide specific engineering data for design purposes.
1.2 Other requirements may be 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 .
1.3 Ethylene plastic materials, being thermoplastic, are reprocessable and recyclable (see Note 0). This specification allows for the use of those ethylene plastic materials, provided that any specific requirements as governed by the producer and the end user are met.Note 0
See Guide D 5033 for information and definitions related to recycled plastics.
1.4 The values stated in SI units are regarded as standard.
1.5 The following precautionary caveat pertains to the test method portion only, Section , of this specification. 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.
1.6 For information regarding plastic pipe materials see Specification D 3350. For information regarding wire and cable materials, see Specification D 1248. For information on polyethylenes with densities below 0.910 g/cm3, see Classification D 5593.Note 2
There is no similar or equivalent ISO standard.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D4976 – 06
Standard Specification for
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Polyethylene Plastics Molding and Extrusion Materials
This standard is issued under the fixed designation D4976; 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 Department of Defense.
INTRODUCTION
This specification is not intended for the selection of materials, but only as a means to call out
plastic materials to be used for the manufacture of parts.The selection of these materials is to be made
by personnel with expertise in the plastics field where the environment, inherent properties of the
materials, performance of the parts, part design, manufacturing process, and economics are
considered. This specification does not specify the source of the resin to be used for the fabrication
of any given article.
1. Scope* of this standard to establish appropriate safety and health
practices and determine the applicability of regulatory limita-
1.1 This specification provides for the identification of
tions prior to use.
polyethylene plastics molding and extrusion materials in such
1.6 For information regarding plastic pipe materials see
a manner that the supplier and the user can agree on the
Specification D3350. For information regarding wire and cable
acceptability of different commercial lots or shipments. The
materials, see Specification D1248. For information on poly-
tests involved in this specification are intended to provide
3
ethylenes with densities below 0.910 g/cm , see Classification
information for identifying materials in accordance with the
D5593.
groups, classes, and grades covered. It is not the function of
this specification to provide specific engineering data for
NOTE 2—There is no similar or equivalent ISO standard.
design purposes.
2. Referenced Documents
1.2 Other requirements may be necessary to identify par-
2
ticular characteristics important to specialized applications.
2.1 ASTM Standards:
These shall be agreed upon between the user and the supplier,
D257 Test Methods for DC Resistance or Conductance of
by using the suffixes given in Section 1.3.
Insulating Materials
1.3 Ethylene plastic materials, being thermoplastic, are
D568 DESIG ATTRIBUTE D0568 HAD NO TITLE IN
reprocessable and recyclable (see Note 1). This specification
SAD_TABLES
allows for the use of those ethylene plastic materials, provided
D618 Practice for Conditioning Plastics for Testing
that any specific requirements as governed by the producer and
D635 Test Method for Rate of Burning and/or Extent and
the end user are met.
Time of Burning of Plastics in a Horizontal Position
D638 Test Method for Tensile Properties of Plastics
NOTE 1—See Guide D5033 for information and definitions related to
D790 Test Methods for Flexural Properties of Unreinforced
recycled plastics.
and Reinforced Plastics and Electrical Insulating Materials
1.4 The values stated in SI units are regarded as standard.
D792 Test Methods for Density and Specific Gravity (Rela-
1.5 The following precautionary caveat pertains to the test
tive Density) of Plastics by Displacement
method portion only, Section 12, of this specification. This
D883 Terminology Relating to Plastics
standard does not purport to address all of the safety concerns,
D1238 Test Method for Melt Flow Rates of Thermoplastics
if any, associated with its use. It is the responsibility of the user
by Extrusion Plastometer
D1248 Specification for Polyethylene Plastics Extrusion
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This specification is under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
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Materials. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 15, 2006. Published November 2006. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1995. Last previous edition approved in 2004 as D4976 - 04. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D4976-06. 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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D4976 – 06
Materials for Wire and Cable 2.3 DOT Standard:
D1505 Test Method for Density of Plastics by the Density-
Federal Motor Vehicle Safety Standard 302, Flammability
5
Gradient Technique
of Interior Materials
D1531 Test Methods for Relative Permittivity (Dielectric
Constant) and Dissipation Factor by Fl
...
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