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D5021-00 – Standard Test Method Technical Guide
📊 Scope and Classification of TECEA Materials
This specification, ASTM D 5021 – 00, outlines the requirements for Thermoplastic Elastomer–Chlorinated Ethylene Alloy (TECEA). These materials are suitable for a variety of processing methods, including injection molding, extrusion, blow molding, and thermoforming (Section 1.1). The standard provides a system for specifying materials used in part fabrication rather than for material selection, which requires expert analysis of design, performance, environment, processing, and economics (Introduction).
Per Section 4, TECEA materials are classified into a hierarchical structure based on processing method, hardness, and final application purpose. The specific property requirements for each classification are detailed in the basic property table (Table TECEA) of the standard.
| 🔢 Classification Level | 📐 Criteria | 🎯 Description / Examples |
|---|---|---|
| Group | Processing Method | Injection Molding, Extrusion, Blow Molding, Thermoforming |
| Class | Hardness (Shore D) | Defined ranges of durometer hardness per Test Method D 2240 |
| Grade | Purpose / Modifications | General Purpose, Impact Modified, UV Stabilized, or other suffixes per Section 5 |
🔬 Referenced Test Methods and Mandated Practices
The standard mandates specific test methods to ensure uniformity and conformance. All testing must be conducted in accordance with the specified ASTM standards. The values stated in SI units are regarded as the standard, following IEEE/ASTM SI 10 (Section 1.4).
| 🟦 Property or Practice | 📏 Standard Method | ⚙️ Key Details |
|---|---|---|
| Durometer Hardness | D 2240 | Measures indentation hardness; defines the Class of the material. |
| Tensile Properties | D 412 | Determines tensile
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