ASTM D4020 - 18
Standard Specification for Ultra-High-Molecular-Weight Polyethylene Molding and Extrusion Materials
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Abstract
This specification provides for the identification of virgin, unmodified homopolymer ultra-high-molecular-weight polyethylene (UHMW-PE) molding and extrusion plastic materials in the form of powder, granules, or pellets. This specification is not intended to differentiate between various molecular weight grades of commercially available UHMW-PE, nor does it function to provide specific engineering data for design purposes. Sampled specimens shall be tested for dilute solution viscosity.
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 specification provides for the identification of virgin, natural color, unmodified homopolymer ultra-high-molecular-weight polyethylene (UHMWPE) plastics molding and extrusion materials. This identification is made in such a manner that the seller and purchaser can agree on the acceptability of different commercial lots or shipments.
1.2 This specification also provides guidance for the characterization of UHMWPE materials based on various mechanical, thermal, electrical, and other analyses.
1.3 It is not intended to differentiate between various molecular weight grades of ultra-high-molecular-weight polyethylene commercially available.
1.4 It is not the function of this specification to provide specific engineering data for design purposes.
1.5 Ultra-high-molecular-weight polyethylenes, as defined in this specification, are those linear polymers of ethylene which have a relative viscosity of 1.44 or greater, in accordance with the test procedures described herein.
1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.7 The following precautionary caveat pertains only to the test method portions in Section 7 and the Annex and Appendixes, 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.
Note 1: This standard and ISO 11542-1 address the same subject matter, but differ in technical content. ISO 11542-1 provides a classification system based on various characteristics and a range of viscosity numbers determined in accordance with ISO 1628-3.
1.8 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
C1444 Test Method for Measuring the Angle of Repose of Free-Flowing Mold Powders
D256 Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics
D618 Practice for Conditioning Plastics for Testing
D635 Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position
D638 Test Method for Tensile Properties of Plastics
D648 Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
D790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D883 Terminology Relating to Plastics
D1601 Test Method for Dilute Solution Viscosity of Ethylene Polymers
D1894 Test Method for Static and Kinetic Coefficients of Friction of Plastic Film and Sheeting
D1895 Test Methods for Apparent Density, Bulk Factor, and Pourability of Plastic Materials
D1921 Test Methods for Particle Size (Sieve Analysis) of Plastic Materials
D2240 Test Method for Rubber PropertyDurometer Hardness
D2951 Test Method for Resistance of Types III and IV Polyethylene Plastics to Thermal Stress-Cracking
D4703 Practice for Compression Molding Thermoplastic Materials into Test Specimens, Plaques, or Sheets
E313 Practice for Calculating Yellowness and Whiteness Indices from Instrumentally Measured Color Coordinates
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
IEC Standards
IEC 243-1 Recommended Methods of Test for Electric Strength of Solid Insulating Material at Power Frequencies IEC 93 Recommended Methods of Test for Volume and Surface Resistivities of Electrical Insulating MaterialsISO Standards
ISO 11542-1 PlasticsUltra High Molecular-Weight Polyethylene (PE-UHMW) Moulding and Extrusion MaterialsPart 1: Designation System and Basis for Specification ISO11542-2 ISO 11542–2 ISO 1183 A PlasticsMethods for Determining the Density and Relative Density of Non-cellular Plastics ISO 1628-3 PlasticsDetermination of Viscosity Number and Limiting Viscosity NumberPart 3: Polyethylenes and Polypropylenes ISO180 Determination of Izod Impact Strength of Rigid Materials ISO 3146 PlasticsDetermination of Melting Behavior (Melting Temperature or Melting Range) of Semicrystalline Polymers ISO 527-1 Determination of tensile Properties, Part 1 General Principles ISO 62 PlasticsDetermination of Water Absorption ISO 868ICS Code
ICS Number Code 83.140.99 (Other rubber and plastic products)
UNSPSC Code
UNSPSC Code 13111016(Polyethylene)
Referencing This Standard
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DOI: 10.1520/D4020-18
Citation Format
ASTM D4020-18, Standard Specification for Ultra-High-Molecular-Weight Polyethylene Molding and Extrusion Materials, ASTM International, West Conshohocken, PA, 2018, www.astm.org
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