ASTM D5990-20a

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Designation: D5990 − 20 D5990 − 20a
Standard Classification System and Basis for
Polyketone Injection Molding and Extrusion Materials (PK)
This standard is issued under the fixed designation D5990; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This classification system covers polyketone materials suitable for injection molding and extrusion. This classification system
does not address recycled polyketone materials.
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 and subsequent line call out (specification) 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 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.
1.4 The following precautionary caveat pertains only to the test method 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.
NOTE 1—This classification system and ISO 21970-1 and ISO 21970-2 address the same subject matter, but differ in technical content.
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.
2. Referenced Documents
2.1 ASTM Standards:
D256 Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics
D618 Practice for Conditioning Plastics for Testing
D638 Test Method for Tensile Properties of Plastics
D648 Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D883 Terminology Relating to Plastics
D1238 Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer
These test methods are under the jurisdiction of ASTM Committee D20 on Plastics and are the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials.
Current edition approved Feb. 1, 2020Sept. 1, 2020. Published March 2020September 2020. Originally approved in 1996. Last previous edition approved in 20002020
as D5990 – 00D5990 – 20., which was withdrawn September 2007 and reinstated in February 2020. DOI: 10.1520/D5990-20. DOI: 10.1520/D5990-20A.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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
D5990 − 20a
D1600 Terminology for Abbreviated Terms Relating to Plastics
D3418 Test Method for Transition Temperatures and Enthalpies of Fusion and Crystallization of Polymers by Differential
Scanning Calorimetry
D3641 Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials
D3892 Practice for Packaging/Packing of Plastics
D4000 Classification System for Specifying Plastic Materials
D5630 Test Method for Ash Content in Plastics
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
2.2 ISO Standards:
ISO 21970-1 Plastics—Polyketone (PK) moulding and extrusion materials—Part 1: Designation system and basis for
specifications
ISO 21970-2 Plastics—Polyketone (PK) moulding and extrusion materials—Part 2: Preparation of test specimens and
determination of properties
3. Terminology
3.1 Except for the term defined as follows, the terminology used in this classification system is in accordance with Terminologies
D883 and D1600.
3.2 Definitions:
3.2.1 polyketone (PK), n—a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon.
4. Classification
4.1 Unreinforced polyketone materials are classified into groups according to their composition. These groups are subdivided into
classes and grades as shown in Table PK.
NOTE 2—An example of this classification system is given as follows. The designation PK0112 indicates the following:
PK = Polyketone as found in Terminology D1600,
01 = Carbon monoxide olefin (Ethylene-propylene),
1 = General purpose (class), and
2 = Requirements given in Table PK (grade).
4.1.1 To facilitate incorporation of future or special materials the “other” category for group (00), class (0), and grade (0) is shown
in Table PK. The basic properties of these materials can be obtained from Table A as they apply.
4.2 Reinforced, filled, and lubricated versions of polyketone materials that are not in Table PK are classified in accordance with
Tables PK and A. Table PK is used to specify the group of polyketone materials and Table A is used to specify the property
requirements after the addition of reinforcements, pigments, fillers, or lubricants at the nominal level indicated (see 4.2.1).
4.2.1 Reinforced versions of the basic materials are identified by a single letter that indicates the reinforcement used and two digits
that indicate the nominal quantity in percent by weight. Thus, a letter designation G for glass fiber reinforced and 33 for percent
of reinforcement, G33, specifies a filled material with a nominal glass level of 33 %. The reinforcement letter designations and
associated tolerance levels are tabulated as follows:
Symbol Material Tolerance
C Carbon and graphite fiber reinforced ±3 %
G Glass fiber reinforced ±3 %
L Lubricants (such as PTFE and silicone) Depends upon material and process—to be specified.
M Mineral-reinforced ±3 %
R Combinations of reinforcements or fillers, or both ±3 %
NOTE 3—This part of the classification system uses the percent of reinforcements or additives or both in the call-out of the modified basic material. The
types and percentages of reinforcements and additives should be shown on the supplier’s technical data sheet unless they are proprietary in nature. If
necessary, additional call-out of these reinforcements and additives can be accomplished by use of the suffix part of the system (see Section 3). Ash content
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
D5990 − 20a
of filled or reinforced materials may be determined using Test Method D5630 where applicable.
4.2.2 Specific requirements for reinforced, filled, or lubricated polyketone materials shall be shown by a six-character designation.
The designation consists of the letter “A” and the five digits comprising the cell numbers for the property requirements in the order
as they appear in Table A.
4.2.2.1 Although the values listed are necessary to include the range of properties available in existing materials, users should not
infer that every possible combination of the properties exists or can be obtained.
4.2.3 When the grade of the basis material is not known, or is not important, the use of the “0”-grade classification shall be used
for the reinforced materials in this system.
NOTE 4—An example of this classification for a reinforced polyketone material is given as follows: The designation PK0120G30A76360 would indicate
the following material requirements:
PK0120 = High flow ethylene-propylene copolymer polyketone from Table PK,
G 30 = Glass reinforcement at 30 % nominal level,
A = Table A property requirements,
7 = Tensile strength 170 MPa min,
6 = Tensile modulus 10 GPa min,
3 = Izod impact strength 120 J/m min,
6 = Deflection temperature 220°C min, and
0 = Unspecified.
5. Suffixes
5.1 When additional requirements are needed that are not covered by the basic requirements or cell-table requirements, they shall
be indicated through the use of suffixes.
5.2 A list of suffixes can be found in Classification D4000 (Table 3) and may be use
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