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D6123 – Standard Test Method Technical Guide
📐 Tape Types and Applications
This specification covers paper-backed pressure-sensitive tapes designed for light-duty packaging and general-purpose masking. These tapes are intended for applications such as bundling small parts for overpacking, holding components to assemblies, temporary closure of chipboard or fiberboard boxes not shipped via common carrier, and masking surfaces during painting or finishing processes.
Two types are defined based on backing material: Type I uses crepe paper backing for enhanced conformability, ideal for irregular surfaces. Type II uses flat paper backing, providing greater strength and suitable for straight-line masking tasks. These tapes are not substitutes for those covered under Specification D5486/D5486M for heavy-duty packaging.
⚙️ Key Test Methods and Specifications
The specification references several ASTM test methods to ensure performance characteristics. The table below lists key test methods used to evaluate tape properties:
| 🔬 Test Method | 📏 Property Measured |
|---|---|
| D3330/D3330M | Peel Adhesion |
| D3759/D3759M | Breaking Strength and Elongation |
| D3121 | Tack (Rolling Ball Method) |
| D3652/D3652M | Thickness |
| D5570 | Water Resistance |
⚠️ The test methods specified in Section 13 include safety hazards. Users must establish appropriate safety, health, and environmental practices before conducting tests.
According to Section 5, tapes are classified by backing type as shown below:
| 🟦 Type | 📐 Backing Material | 🎯 Intended Use |
|---|---|---|
| Type I | Crepe Paper | Applications requiring conformability |
| Type II | Flat Paper | Uses requiring more strength and straight-line masking |
💡 Remember that values in inch-pound and SI units are not exact equivalents. Each system must be used independently without combining values.
❓ Frequently Asked Questions
🔍 What is the scope of ASTM D6123?
It covers paper-backed pressure-sensitive tapes for light-duty packaging and general-purpose masking, as defined in Section 1.
💡 What are the differences between Type I and Type II tapes?
Type I has crepe paper backing for conformability, while Type II has flat paper backing for greater strength and straight-line masking.
⚡ Can these tapes be used for shipping boxes by common carrier?
No, these tapes are intended for temporary closure of boxes not shipped by common carrier and are not substitutes for tapes under D5486/D5486M.
📌 What referenced documents are important for testing?
Key referenced ASTM standards include D3330 for peel adhesion, D3759 for breaking strength, and D3121 for tack, among others listed in Section 2.