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ASTM D4020-05

(Specification)

Standard Specification for Ultra-High-Molecular-Weight Polyethylene Molding and Extrusion Materials

Standard Specification for Ultra-High-Molecular-Weight Polyethylene Molding and Extrusion Materials

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.
SCOPE
1.1 This specification provides for the identification of virgin, unmodified homopolymer ultra-high-molecular-weight polyethylene (UHMW-PE) 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 It is not intended to differentiate between various molecular weight grades of ultra-high-molecular-weight polyethylene commercially available.
1.3 It is not the function of this specification to provide specific engineering data for design purposes.
1.4 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.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 The following precautionary 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 1—There is no ISO equivalent specification. However, in ISO 11542-1, a range of viscosity numbers defines the viscosity of UHMW-PE grades. The viscosity numbers are determined in accordance with ISO 1628-3.

General Information

Status
Historical
Publication Date
31-May-2005
ICS
83.140.99 - Other rubber and plastics products
Technical Committee
D20 - Plastics
Drafting Committee
D20.15 - Thermoplastic Materials
Current Stage
Ref Project

Relations

Replaces
ASTM D4020-01a - Standard Specification for Ultra-High-Molecular-Weight Polyethylene Molding and Extrusion Materials
Effective Date
01-Jun-2005
Replaced By
ASTM D4020-11 - Standard Specification for Ultra-High-Molecular-Weight Polyethylene Molding and Extrusion Materials
Effective Date
01-Sep-2011
Referred By
ASTM F648-21 - Standard Specification for Ultra-High-Molecular-Weight Polyethylene Powder and Fabricated Form for Surgical Implants
Effective Date
01-Jun-2005
Referred By
ASTM F2759-19 - Standard Guide for Assessment of the Ultra-High Molecular Weight Polyethylene (UHMWPE) Used in Orthopedic and Spinal Devices
Effective Date
01-Jun-2005
Referred By
ASTM D4000-23 - Standard Classification System for Specifying Plastic Materials
Effective Date
01-Jun-2005
Referred By
ASTM D6712-17 - Standard Specification for Ultra-High-Molecular-Weight Polyethylene (UHMW-PE) Solid Plastic Shapes
Effective Date
01-Jun-2005
Referred By
ASTM F2695-12(2020) - Standard Specification for Ultra-High Molecular Weight Polyethylene Powder Blended With Alpha-Tocopherol (Vitamin E) and Fabricated Forms for Surgical Implant Applications
Effective Date
01-Jun-2005
Referred By
ASTM D7611/D7611M-21 - Standard Practice for Coding Plastic Manufactured Articles for Resin Identification
Effective Date
01-Jun-2005
Referred By
ASTM D1601-18 - Standard Test Method for Dilute Solution Viscosity of Ethylene Polymers
Effective Date
01-Jun-2005
Referred By
ASTM F2193-20 - Standard Specifications and Test Methods for Components Used in the Surgical Fixation of the Spinal Skeletal System
Effective Date
01-Jun-2005

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ASTM D4020-05 - Standard Specification for Ultra-High-Molecular-Weight Polyethylene Molding and Extrusion MaterialsASTM D4020-05 - Standard Specification for Ultra-High-Molecular-Weight Polyethylene Molding and Extrusion Materials
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ASTM D4020-05 - Standard Specification for Ultra-High-Molecular-Weight Polyethylene Molding and Extrusion Materials
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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: D4020 – 05
Standard Specification for
Ultra-High-Molecular-Weight Polyethylene Molding and
1
Extrusion Materials
This standard is issued under the fixed designation D4020; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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* 2. Referenced Documents
2
1.1 This specification provides for the identification of 2.1 ASTM Standards:
virgin, unmodified homopolymer ultra-high-molecular-weight D883 Terminology Relating to Plastics
polyethylene (UHMW-PE) plastics molding and extrusion D1601 Test Method for Dilute Solution Viscosity of Ethyl-
materials.This identification is made in such a manner that the ene Polymers
3
seller and purchaser can agree on the acceptability of different D1898 Practice for Sampling Plastics
4
commercial lots or shipments. 2.2 ISO Standards:
1.2 It is not intended to differentiate between various ISO 11542-1 Plastics—Ultra High Molecular-Weight Poly-
molecular weight grades of ultra-high-molecular-weight poly- ethylene (PE-UHMW) Moulding and Extrusion
ethylene commercially available. Materials—Part 1: Designation System and Basis for
1.3 It is not the function of this specification to provide Specification
specific engineering data for design purposes. ISO 1628-3 Plastics—Determination of Viscosity Number
1.4 Ultra-high-molecular-weight polyethylenes, as defined and Limiting Viscosity Number—Part 3: Polyethylenes
in this specification, are those linear polymers of ethylene and Polypropylenes
which have a relative viscosity of 1.44 or greater, in accor-
3. Terminology
dance with the test procedures described herein.
3.1 Definitions—Definitions of terms used in this specifica-
1.5 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information tion are in accordance with Terminology D883.
only. 3.2 Definitions of Terms Specific to This Standard:
3.2.1 ultra-high-molecular-weight polyethylene molding
1.6 The following precautionary caveat pertains only to the
test method portion. Section 7, of this specification: This andextrusionmaterials—asdefinedbythisspecification,those
substantiallylinearpolyethyleneswhichhavearelativeviscos-
standard does not purport to address all of the safety concerns,
if any, associated with its use. It is the responsibility of the user ityof1.44orgreater,ataconcentrationof0.02%,at135°C,in
decahydronaphthalene.
of this standard to establish appropriate safety and health
practices and determine the applicability of regulatory limita- 3.2.1.1 Discussion—Ithasbeencommonpracticetoreferto
the “molecular weight” of UHMW-PE resins. The following
tions prior to use.
calculations shall be used to approximate the specific viscosity
NOTE 1—There is no ISO equivalent specification. However, in
(h ), reduced viscosity (hred or R.S.V.), intrinsic viscosity (h
sp
ISO11542-1, a range of viscosity numbers defines the viscosity of
or I.V.), and the approximate viscosity average molecular
UHMW-PE grades. The viscosity numbers are determined in accordance
weight of virgin resin. The solution viscosity test on thermally
with ISO1628-3.
processed material is invalid due to inadequate solubility and
possible crosslinking.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This specification is under the jurisdiction of ASTM Committee D20 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Standards volume information, refer to the standard’s Document Summary page on
Materials. the ASTM website.
3
Current edition approved June 1, 2005. Published June 2005. Originally Withdrawn.
4
approved in 1981. Last previous edition approved in 2001 as D4020-01a. DOI: Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/D4020-05. 4th Floor, New York, NY 10036.
*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.
1

---------------------- Page: 1 ----------------------
D4020 – 05
k k
5.2 Themoldingandextrusionmaterialsshallbeasuniform
Relativeviscosity5h 5 t 2 / t 2 (1)
S D S D
r s o
t t
s o in composition and size and as free of contamination as can be
achieved by good manufacturing practice. If necessary, the
Specificviscosity5h 5h 21
sp r
level of contamination may be agreed upon between the seller
h
sp
Reducedviscosity5h 5
and the purchaser.
red
C
5.3 Unless controlled by r
...

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5.1 Molding and extruding plastic pellets require dust free, dry pellets to prevent processing problems. Plastic producers try to remove the dust and streamers with dust removal systems prior to packaging and loading. How to accurately measure dust and streamer content in plastic pellets is an important quality control issue.  
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SCOPE
1.1 This test method measures the amount of fine particles adhered on plastic pellets or granules in which they are commonly produced and supplied. The lower limit of this test method is restricted only by the porosity of the filter disc used to capture the particle size being quantified.  
1.2 The wet analysis technique allows for separation and collection of statically charged particles by liquid wash and filtration methods. This must be performed under standard laboratory conditions.  
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Standard Classification System and Basis for Specification for Cellulose Acetate Propionate Molding and Extrusion Compounds (CAP)

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1.1 This classification system covers requirements for plasticized cellulose acetate propionate thermoplastic compounds suitable for injection molding and extrusion. These compounds have a propionyl content less than 48 % and an acetyl content less than 3 % and can contain dyes and pigments. Cellulosic plastic materials, being thermoplastic, are reprocessable and recyclable. This classification system allows for the use of those cellulosic materials, provided that all specific requirements of this classification system are met.  
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SCOPE
1.1 This classification system covers polyphthalamide (PPA) materials suitable for injection molding.  
1.2 The properties included in this classification system are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications are to be specified by using suffixes as given in Section 5.  
1.3 This classification system allows for the use of recycled materials provided that all specification requirements are met.  
1.4 This classification system is intended to be a means of calling out plastics materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection can be made by those having expertise in the plastics field only after careful consideration of the design and the performance required 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 to be regarded as the standard (see IEEE/ASTM SI-10). The values given in parentheses are for information only.  
1.6 The following precautionary caveat pertains only to the test methods portion, Section 11, 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in 11.7.1.
Note 1: There is no known ISO equivalent to this standard. ISO 16396-1/-2 for polyamides may also be used to describe and classify these PPA materials, but the technical content is significantly different.
Note 2: ASTM Standard D6779 on polyamide materials also includes PPA materials in its coverage of various polyamide chemistries. This standard gives additional information for classification and specification for PPA compositions classified as Group 10 (PA6T/66), Group 12 (PA6T/6I/66) and Group 13 (PA6T/6I) in ASTM Standard D6779 and includes provisions for other PPA compositions to utilize the classification presented.  
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.

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ASTM
ASTM D3294-22(Specification)
Standard Specification for Polytetrafluoroethylene (PTFE) Resin Molded Sheet and Molded Basic Shapes

ABSTRACT
This specification establishes the requirements and test methods for the material, dimensions, and workmanship, and the physical and electrical properties of molded sheet manufactured from polytetrafluoroethylene (PTFE) resin molding materials and molded basic shapes made from resin molding and extrusion materials. The sheet or molded basic shape shall be made from unpigmented PTFE and shall be free from foreign matters. Each of the samples shall undergo visual and dimensional inspection to verify their compliance with the standard requirements. The specimens shall conform to the following physical and electrical property requirements: tensile strength; elongation; dielectric strength; specific gravity; porosity; and melting point. Examination for internal defects shall also be conducted to ensure that the specimens are free from microscopic cracks, voids, inclusions, and other surface defects that might affect the serviceability of the materials.
SCOPE
1.1 This specification establishes requirements and methods of test for the material, dimensions, and workmanship, and the physical and electrical properties of molded sheet in minimum thicknesses of 0.794 mm (1/32 in.) manufactured from PTFE resin molding materials defined in Specification D4894.  
1.2 This specification also establishes requirements for molded basic shapes made from molding materials. This specification is for products 300 mm (12 in.) or less in a dimension parallel to and 12.7 mm (0.5 in.) or greater in the dimension perpendicular to the direction of the applied molding pressure.  
1.3 The values stated in SI units are to be regarded as the standard.  
1.4 The following precautionary caveat pertains only to the test method portion, Section 7, 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. Special attention is called to 13.2, 13.3, 13.6, 13.8, and A1.  
Note 1: There is no known ISO equivalent to this standard.  
1.5 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.

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