ASTM D1248-05
(Specification)Standard Specification for Polyethylene Plastics Extrusion Materials For Wire and Cable
Standard Specification for Polyethylene Plastics Extrusion Materials For Wire and Cable
ABSTRACT
This specification provides for the identification of polyethylene plastics extrusion materials for wire and cable in such a manner that the seller and the purchaser can agree on the acceptability of different commercial lots or shipments. The polyethylene plastics are identified primarily on the basis of two characteristics, namely, density and flow rate (previously identified as melt index). The former is the criterion for assignment as to type which are as follows: Type 0,Type I, Type II, Type III, and Type IV, the latter for designation as to category which are: Category 1,Category 2, Category 3,Category 4, and Category 5. Other attributes important for certain applications are covered by three general classes and by specifying in greater detail, by grades, a minimum number of key characteristics covered too broadly or not at all by the type, class, and category designations. Each of five types and categories is subdivided into four classes according to composition and use as follows: Class A, Class B, Class C, and Class D. In addition, the materials can be classified into different grades namely Grade E1, Grade E2, Grade E3, Grade E4, Grade E5, Grade E6, Grade E7, Grade E8, Grade E9, and Grade E10. The extrusion material for wire and cable shall be polyethylene plastic in the form of powder, granules, or pellets. The extrusion materials for wire and cable shall be as uniform in composition and size and as free of contamination as can be achieved by good manufacturing practice. Different tests shall be conducted in order to determine the following physical properties of extrusion materials: tensile stress, elongation, brittleness temperature, environmental stress-crack resistance, thermal stress-crack resistance without cracking, dissipation factor before and after milling, dielectric constant, volume resistivity, water immersion stability, absorption coefficient, weatherability for colored materials, and carbon content.
SCOPE
1.1 This specification provides for the identification of polyethylene plastics extrusion materials for wire and cable in such a manner that the seller and the purchaser 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 according to the types, classes, categories, and grades covered. It is not the function of this specification to provide specific engineering data for design purposes.
1.2 This specification does not allow for the use of recycled plastics (see Note 0).
1.3 The values stated in SI units are to be regarded as the standard.
The following safety hazards caveat pertains only to the test method portion, 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.Note 2
No ISO equivalent.Note 3
This standard has undergone major revision from the reapproval of 1989 and now covers only polyethylene for wire and cable applications. For information regarding molding and extrusion materials, see Specification D 4976. For information regarding plastic pipe materials, see Specification D 3350.Note 0
See Guide D 5033 for information and definitions related to recycled plastics.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D1248 – 05
Standard Specification for
Polyethylene Plastics Extrusion Materials for Wire and
1
Cable
This standard is issued under the fixed designation D1248; 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.
1. Scope* mittivity (Dielectric Constant) of Solid Electrical Insula-
tion
1.1 This specification provides for the identification of
D257 Test Methods for DC Resistance or Conductance of
polyethylene plastics extrusion materials for wire and cable in
Insulating Materials
suchamannerthatthesellerandthepurchasercanagreeonthe
D618 Practice for Conditioning Plastics for Testing
acceptability of different commercial lots or shipments. The
D638 Test Method for Tensile Properties of Plastics
tests involved in this specification are intended to provide
D746 Test Method for Brittleness Temperature of Plastics
information for identifying materials according to the types,
and Elastomers by Impact
classes, categories, and grades covered. It is not the function of
D792 Test Methods for Density and Specific Gravity (Rela-
this specification to provide specific engineering data for
tive Density) of Plastics by Displacement
design purposes.
D1238 Test Method for Melt Flow Rates of Thermoplastics
1.2 This specification does not allow for the use of recycled
by Extrusion Plastometer
plastics (see Note 3).
D1505 Test Method for Density of Plastics by the Density-
1.3 The values stated in SI units are to be regarded as the
Gradient Technique
standard.
D1531 Test Methods for Relative Permittivity (Dielectric
1.4 The following safety hazards caveat pertains only to the
Constant) and Dissipation Factor by Fluid Displacement
test method portion, Section 12, of this specification: This
Procedures
standard does not purport to address all of the safety concerns,
D1603 Test Method for Carbon Black Content in Olefin
if any, associated with its use. It is the responsibility of the user
Plastics
of this standard to establish appropriate safety and health
D1693 Test Method for Environmental Stress-Cracking of
practices and determine the applicability of regulatory limita-
Ethylene Plastics
tions prior to use.
D1898 Practice for Sampling of Plastics
NOTE 1—No ISO equivalent.
D2565 Practice for Xenon-Arc Exposure of Plastics In-
NOTE 2—This standard has undergone major revision from the reap-
tended for Outdoor Applications
proval of 1989 and now covers only polyethylene for wire and cable
D2633 Test Methods for Thermoplastic Insulations and
applications. For information regarding molding and extrusion materials,
Jackets for Wire and Cable
see Specification D4976. For information regarding plastic pipe materials,
D2839 Practice for Use of a Melt Index Strand for Deter-
see Specification D3350.
NOTE 3—See Guide D5033 for information and definitions related to
mining Density of Polyethylene
recycled plastics.
D2951 Test Method for Resistance of Types III and IV
3
Polyethylene Plastics to Thermal Stress-Cracking
2. Referenced Documents
D3182 Practice for Rubber—Materials, Equipment, and
2
2.1 ASTM Standards:
Procedures for Mixing Standard Compounds and Prepar-
D150 Test Methods for AC Loss Characteristics and Per-
ing Standard Vulcanized Sheets
D3349 Test Method for Absorption Coefficient of Ethylene
1 Polymer Material Pigmented with Carbon Black
This specification is under the jurisdiction of ASTM Committee D20 on
D3350 Specification for Polyethylene Plastics Pipe and
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
Materials.
Fittings Materials
Current edition approved March 1, 2005. Published March 2005. Originally
D3636 Practice for Sampling and Judging Quality of Solid
approved in 1952. Last previous edition approved in 2002 as D1248 - 04. DOI:
Electrical Insulating Materials
10.1520/D1248-05.
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
3
Withdrawn. The last approved version of this historical standard is referenced
the ASTM website.
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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D1248 – 05
D3892 Practice for Packaging/Packing of Plastics 3.2.3.3 Grade (1, 2, 3, 4, 5) = melt index ranges (same as
D4329 Practice for Fluoresce
...
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