Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
D3218-07 – Standard Test Method Technical Guide
📐 Scope and Referenced Documents
D3218-07 (Reapproved 2018) provides a comprehensive specification for polyolefin monofilament yarns and standard test methods for their evaluation. Developed under Subcommittee D13.58 on Yarns and Fibers, it is primarily designed for standard polyolefin monofilaments as defined in Section 3.1. Procedures applicable to non-standard monofilaments should be used with caution.
The standard emphasizes that a test method is recommended for acceptance testing of commercial shipments only when interlaboratory precision data is available for the specific procedure (Section 1.2).
| 🟦 Standard | 📏 Application in D3218 |
|---|---|
| D2256 | Tensile Properties (Single-Strand Method) |
| D1907 | Yarn Number by Skein Method |
| D2259 | Shrinkage of Yarns |
| D374 | Thickness Measurement |
| D2565 | Xenon-Arc Exposure of Plastics |
⚙️ Key Test Procedures and Measured Properties
Individual properties are evaluated according to dedicated sections of the specification. The table below summarizes the primary test methods and their corresponding sections.
| 📐 Property | 🎯 Section | ⚡ Primary Method |
|---|---|---|
| Breaking Force / Tenacity | 10 | D2256 |
| Elongation | 10 | D2256 |
| Initial Modulus | 10 | D2256 |
| Hot Water Shrinkage | 14 | D2259 |
| Yarn Number (Linear Density) | 9 | D1907 |
| Thickness | 12 | D374 |
| Resistance to UV Radiation | 15 | D2565 |
💡 Technical Note: While designed for standard monofilaments, many procedures in D3218 can be applied to other polyolefin monofilaments. Always validate the method’s precision and bias for the specific material under evaluation.
⚠️ Safety Caution (Section 1.6): Testing may involve hazardous materials, operations, and equipment. It is the user’s responsibility to establish appropriate safety, health, and environmental practices prior to use.
📊 Units and Compliance Requirements
Per Section 1.5, all values stated in SI units are regarded as the standard. English units provided in the standard are for information only and are not exact equivalents. The standard adheres to internationally recognized principles of standardization established by the WTO TBT Committee (Section 1.7).
❓ Frequently Asked Questions
🔍 Are these test methods valid for all polyolefin monofilaments?
The specification is designed for standard polyolefin monofilaments (Section 3.1). Non-standard monofilaments should be tested with caution, as procedures may require modification.
💡 Can results from these methods be used for acceptance testing?
Yes, but only if interlaboratory precision data are available for the specific test procedure and material being evaluated (Section 1.2).
⚡ What unit system is mandatory for reporting results?
SI units are the standard unit system. English units provided in the standard are informational only and are not exact equivalents (Section 1.5).
📌 What are the user’s safety responsibilities?
The user must establish appropriate safety, health, and environmental practices before testing. The standard