ASTM D5422-25 PDF
Name in English:
St ASTM D5422-25
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Ст ASTM D5422-25
Original standard ASTM D5422-25 in PDF full version. Additional info + preview on request
Full title and description
Standard Test Method for Measurement of Properties of Thermoplastic Materials by Screw-Extrusion Capillary Rheometer — a procedure that defines the use of a screw-extrusion-type capillary rheometer to measure flow and rheological properties of thermoplastics and thermoplastic compounds for quality control, development, and comparative analysis.
Abstract
This test method specifies the operation and data reporting for screw-extrusion capillary rheometers used to determine flow behavior (viscosity, flow curves, and related parameters) of thermoplastic materials. Results are intended to characterize material flow under laboratory conditions and to support quality control, material development, and comparison between lots or formulations; direct factory-process correlation is not implied. The standard notes differences from piston-type capillary rheometers and references related test methods and uncertainty guidance.
General information
- Status: Active standard.
- Publication date: July 1, 2025 (designation D5422-25).
- Publisher: ASTM International (Committee D20 — Plastics).
- ICS / categories: 83.080.20 (Thermoplastic materials).
- Edition / version: D5422-25 (2025 revision of the method).
- Number of pages: 7 pages; DOI 10.1520/D5422-25.
Scope
This method covers use of a screw-extrusion-type capillary rheometer to measure flow properties of thermoplastics and thermoplastic compounds. It explains differences in results relative to piston-type capillary rheometers, states SI units as standard, and highlights that safety, health, and environmental practices are the responsibility of the user. The procedure is intended for laboratory characterization rather than as a direct replication of processing-line conditions.
Key topics and requirements
- Specification of screw-extrusion capillary rheometer operation and geometry relevant to test repeatability.
- Determination and reporting of shear viscosity and flow curves for thermoplastic materials.
- Consideration of effects from fillers, additives, plasticizers, and blends on measured flow properties.
- Comparison notes relative to piston-type capillary rheometers (see Test Method D3835) and reference to uncertainty guidance in related international documents.
- Data formats and units (SI) to support quality control and comparative analysis.
Typical use and users
Used by polymer testing laboratories, QC/QA teams in polymer processing and compounding, material and formulation R&D groups, and suppliers verifying incoming resin lots. The method is applied for batch comparison, production troubleshooting, and characterizing rheological behavior for product development.
Related standards
Closely related to ASTM Test Method D3835 (piston-type capillary rheometer) and referenced in discussion with ISO guidance on capillary and slit-die rheometers (ISO 11443). Historical editions include D5422-17; a 2025 revision produced the current D5422-25 document. The method is developed under ASTM Committee D20, Subcommittee D20.30.
Keywords
capillary rheometer, screw extrusion, flow properties, viscosity, thermoplastics, rheology, material characterization, quality control, D5422-25
FAQ
Q: What is this standard?
A: ASTM D5422-25 is a test method that defines how to measure flow and rheological properties of thermoplastic materials using a screw-extrusion capillary rheometer; it provides procedures, reporting requirements, and notes on interpretation for laboratory characterization.
Q: What does it cover?
A: It covers instrument configuration and test procedures for screw-extrusion capillary rheometers, measurement and reporting of shear viscosity and flow behavior, and comparisons to piston-type capillary rheometers; it is intended for laboratory characterization rather than direct process replication.
Q: Who typically uses it?
A: Polymer testing labs, formulation and process R&D teams, compounders, resin suppliers, and QC/QA departments use this method to assess material flow properties and to perform lot-to-lot comparisons.
Q: Is it current or superseded?
A: The D5422-25 edition (2025) is the current active edition; it supersedes earlier editions such as D5422-17. Work items and committee records document the revision activity leading to the 2025 release.
Q: Is it part of a series?
A: It is part of ASTM Committee D20 plastics test methods and is developed by Subcommittee D20.30; related capillary rheometer methods (for other instrument types) and international guidance documents are considered companion references.
Q: What are the key keywords?
A: capillary rheometer; screw extrusion; flow properties; viscosity; thermoplastic materials; rheology; D5422.