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ASTM D4976 - 12a
Standard Specification for Polyethylene Plastics Molding and Extrusion Materials
Active Standard ASTM D4976 | Developed by Subcommittee:
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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: ten nom sec environmental stress- slow cra thermal str water and weatherability.
This abstract is a brief summary of the referenced standard. It is informational only and not an official
the full text of the standard itself must be referred to for its use and application.
ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
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 necessary to identify particular characteristics important to specialized applications 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 ). 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 1—See Guide
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 . For information regarding wire and cable materials, see Specification .Note 2—There is no known ISO equivalent to this standard.
2. Referenced Documents (purchase separately)
ASTM Standards
Test Methods for DC Resistance or Conductance of Insulating Materials
Method of Test for Burning and/or Extent and Time of Burning of Flexible Plastics in a Vertical Position
Practice for Conditioning Plastics for Testing
Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position
Test Method for Tensile Properties of Plastics
Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
Terminology Relating to Plastics
Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer
Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable
Practice for Filtered Open-Flame Carbon-Arc Exposures of Plastics
Test Method for Density of Plastics by the Density-Gradient Technique
Test Methods for Relative Permittivity (Dielectric Constant) and Dissipation Factor by Fluid Displacement Procedures
Terminology for Abbreviated Terms Relating to Plastics
Test Method for Environmental Stress-Cracking of Ethylene Plastics
Practice for Xenon-Arc Exposure of Plastics Intended for Outdoor Applications
Practice for Use of a Melt Index Strand for Determining Density of Polyethylene
Test Method for Resistance of Types III and IV Polyethylene Plastics to Thermal Stress-Cracking
Specification for Polyethylene Plastics Pipe and Fittings Materials
Test Method for Measuring the Comparative Burning Characteristics of Solid Plastics in a Vertical Position
Practice for Packaging/Packing of Plastics
Classification System for Specifying Plastic Materials
Practice for Fluorescent UV Exposure of Plastics
Practice for Compression Molding Thermoplastic Materials into Test Specimens, Plaques, or Sheets
Test Method for Determining the Flammability Characteristics of Nonrigid Solid Plastics
Test Method for Density of Polyethylene by the Ultrasound Technique
Test Method for Horizontal Burning Characteristics of Cellular Polymeric Materials
Practice for Enclosed Carbon-Arc Exposures of Plastics
Guide for Waste Reduction, Resource Recovery, and Use of Recycled Polymeric Materials and Products
Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
Test Method for Heat and Visible Smoke Release Rates for Materials and Products Using an Oxygen Consumption Calorimeter
Test Method for Notch Tensile Test to Measure the Resistance to Slow Crack Growth of Polyethylene Pipes and Resins
Military Standard
MIL-STD-105 Sampling Procedures and Tables for Inspection by Attributes
ICS Number Code 83.080.20 (Thermoplastic materials)
UNSPSC Code
UNSPSC Code (Polyethylene)
Referencing This Standard
DOI: 10.-12A
ASTM International is a member of CrossRef.
Citation Format
ASTM D4976-12a, Standard Specification for Polyethylene Plastics Molding and Extrusion Materials, ASTM International, West Conshohocken, PA, 2012,ASTM D4976能不能传我一份_百度知道
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