ASTM International Standard Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer ASTM D1238-23

1.1 This test method covers the determination of the rate of extrusion of molten thermoplastic resins using an extrusion plastometer. 1.2 The values stated in SI units are to be regarded as standard. 1.3 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 1133 address the same subject matter, but differ in technical content. 1.4 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.