ASTM D7436 - 12

    Standard Classification System for Unfilled Polyethylene Plastics Molding and Extrusion Materials with a Fractional Melt Index Using ISO Protocol and Methodology

    Active Standard ASTM D7436 | Developed by Subcommittee: D20.15

    Book of Standards Volume: 08.03


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    Abstract

    This specification is intended to provide a callout system for polyethylene utilizing specimen preparation procedures and test methods based primarily on ISO standards. The 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 specification also lists the requirements that would allow for the use of recycled polyethylene materials. These requirements include the colour and form of the material.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; 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. 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 1See 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 2There is no known ISO equivalent to this standard.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D883 Terminology Relating to Plastics

    D1248 Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable

    D1600 Terminology for Abbreviated Terms Relating to Plastics

    D1693 Test Method for Environmental Stress-Cracking of Ethylene Plastics

    D2565 Practice for Xenon-Arc Exposure of Plastics Intended for Outdoor Applications

    D3350 Specification for Polyethylene Plastics Pipe and Fittings Materials

    D3763 Test Method for High Speed Puncture Properties of Plastics Using Load and Displacement Sensors

    D3892 Practice for Packaging/Packing of Plastics

    D4000 Classification System for Specifying Plastic Materials

    D4329 Practice for Fluorescent UV Exposure of Plastics

    D4703 Practice for Compression Molding Thermoplastic Materials into Test Specimens, Plaques, or Sheets

    D4976 Specification for Polyethylene Plastics Molding and Extrusion Materials

    D6436 Guide for Reporting Properties for Plastics and Thermoplastic Elastomers

    D7209 Guide for Waste Reduction, Resource Recovery, and Use of Recycled Polymeric Materials and Products

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    ISO Standards

    ISO3167 Dimensions of Test Specimens

    SAE Standards

    SAEJ2527 Performance Based Standard for Accelerated Exposure of Automotive Exterior Materials Using a Controlled Irradiance Xenon-Arc Apparatus


    ICS Code

    ICS Number Code 83.080.20 (Thermoplastic materials)

    UNSPSC Code

    UNSPSC Code 13111016(Polyethylene)


    DOI: 10.1520/D7436-12

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