ASTM D4976-12a(2020)

Standard Specification for Polyethylene Plastics Molding and Extrusion Materials (Includes all amendments and changes 11/17/2022).

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STANDARD published on 1.12.2020

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The information about the standard:

Designation standards: ASTM D4976-12a(2020)
Publication date standards: 1.12.2020
SKU: NS-1013574
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Thermoplastic materials

Annotation of standard text ASTM D4976-12a(2020) :

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.

Keywords:
molding and extrusion materials, polyethylene,, ICS Number Code 83.080.20 (Thermoplastic materials)

Additional information

1. 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 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.

1.3?Ethylene plastic materials, being thermoplastic, are reprocessable and recyclable (see Note 1). 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 D7209 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 12, 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6?For information regarding plastic pipe materials see Specification D3350. For information regarding wire and cable materials, see Specification D1248.

Note 2:?There is no known ISO equivalent to this standard.

1.7?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

2. Referenced Documents

F1473-23	Standard Test Method for Notch Tensile Test to Measure the Resistance to Slow Crack Growth of Polyethylene Pipes and Resins
D1600-18	Standard Terminology for Abbreviated Terms Relating to Plastics (Withdrawn 2024)
	Federal Motor Vehicle Safety Standard 302, Flammability of Interior Materials Available from United States Department of Transportation, National Highway Traffic Safety Administration, Office of Public Affairs and Consumer Participation, 400 7th St., SW, Washington, DC 20590.
D1531-06	Standard Test Methods for Relative Permittivity (Dielectric Constant) and Dissipation Factor by Fluid Displacement Procedures (Withdrawn 2012)
D2565-23	Standard Practice for Xenon-Arc Exposure of Plastics Intended for Outdoor Applications
D2839-16(2023)	Standard Practice for Use of a Melt Index Strand for Determining Density of Polyethylene
D2951-00	Standard Test Method for Resistance of Types III and IV Polyethylene Plastics to Thermal Stress-Cracking (Withdrawn 2006)
D3350-21	Standard Specification for Polyethylene Plastics Pipe and Fittings Materials
D3801-20a	Standard Test Method for Measuring the Comparative Burning Characteristics of Solid Plastics in a Vertical Position (Includes all amendments and changes 9/11/2020).
D4000-23	Standard Classification System for Specifying Plastic Materials
D4329-21	Standard Practice for Fluorescent Ultraviolet (UV) Lamp Apparatus Exposure of Plastics
D4703-16	Standard Practice for Compression Molding Thermoplastic Materials into Test Specimens, Plaques, or Sheets
D6360-15(2021)	Standard Practice for Enclosed Carbon-Arc Exposures of Plastics
D7209-06	Standard Guide for Waste Reduction, Resource Recovery, and Use of Recycled Polymeric Materials and Products (Withdrawn 2015)
E29-22	Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E1354-23	Standard Test Method for Heat and Visible Smoke Release Rates for Materials and Products Using an Oxygen Consumption Calorimeter
MIL-STD-105	Sampling Procedures and Tables for Inspection by Attributes
D257-14(2021)e1	Standard Test Methods for DC Resistance or Conductance of Insulating Materials (Includes all amendments and changes 5/6/2021).
D568-77(1985)	Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Flexible Plastics in a Vertical Position (Withdrawn 1991)
D618-21	Standard Practice for Conditioning Plastics for Testing
D635-22	Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position
D638-22	Standard Test Method for Tensile Properties of Plastics
D790-17	Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
D792-20	Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D883-24	Standard Terminology Relating to Plastics
D1238-23a	Standard Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer (Includes all amendments and changes 12/6/2023).
D1248-16	Standard Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable
D1499-13(2021)	Standard Practice for Filtered Open-Flame Carbon-Arc Exposures of Plastics
D1505-18	Standard Test Method for Density of Plastics by the Density-Gradient Technique
D1693-21	Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics
D3892-15(2020)	Standard Practice for Packaging/Packing of Plastics
D4804-23	Standard Test Method for Determining the Flammability Characteristics of Nonrigid Solid Plastics
D4883-18	Standard Test Method for Density of Polyethylene by the Ultrasound Technique
D4986-22	Standard Test Method for Horizontal Burning Characteristics of Cellular Polymeric Materials

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