This classification covers polyoxymethylene materials suitable for molding and extrusion. This specification allows for the use of polyoxymethylene plastic materials that are recycled, reconstituted, recycled-regrind, recovered, or reprocessed, or combination thereof, provided that the requirements as stated in this specification are met. Test specimens shall be molded by injection molding and all test pieces shall be tested as molded and conditioned in the standard laboratory atmosphere. The mechanical properties of the unreinforced and reinforced, filled, or lubricated polyoxymethylene materials shall be determined and shall conform to the following requirements: flow rate; melting point; tensile strength; tensile modulus; Charpy impact resistance; and deflection temperature.

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 covers polyoxymethylene materials suitable for molding and extrusion. This classification system allows for the use of polyoxymethylene plastic materials that are recycled, reconstituted, recycled-regrind, recovered, or reprocessed, or combination thereof, provided that the requirements as stated in this specification are met. It is the responsibility of the supplier and the buyer of recycled, reconstituted, recycled-regrind, recovered, or reprocessed polyoxymethylene plastic materials, or combination thereof, to ensure compliance. (See Guide D7209).

1.2 The properties included in this standard 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 callout (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 can be made by those having expertise in the plastic 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 standard.

1.4 The values stated in SI units are to be regarded as the standard.

1.5 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 and health practices and determine the applicability of regulatory requirements prior to use.

Note 1—This classification system is similar to ISO 9988-1/-2, although the technical content is significantly different.

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

ISO Standards

Keywords

acetal; acetal copolymer; acetal homopolymer; acetal terpolymer; classification; classification system; line callout; L-P-392A; MIL-P-46137A (MR); plastic materials; polyformaldehyde; polyoxymethylene; polyoxymethylene copolymer; polyoxymethylene homopolymer; polyoxymethylene terpolymer; POM; recycle; specification;

ICS Code

ICS Number Code 83.140.01 (Rubber and plastic products in general)

Citing ASTM Standards

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