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D2060-14 – Standard Test Method Technical Guide
📏 Core Dimensional Measurements: Length, Tape, and Chain Width
The fundamental dimensions of a zipper are verified using the procedures in Sections 9–14, 15–20, and 45–50. The length of the zipper is measured from the outside bottom of the top stop to the outside top of the bottom stop, or to the outside edge of the insertion pin on separable zippers. Tape width is measured perpendicular to the tape edges using a precision scale or ruler, excluding the woven selvedge. Chain width is measured across the interlocked elements from the outside of one element to the outside of the opposing element. All specimens must be conditioned to equilibrium in the standard atmosphere for testing textiles, as specified in Practice D1776.
📐 Slider and Chain Profile Characterization
The cross-sectional profile and alignment of the zipper assembly are critical to its performance. Slider mouth width (Sections 21–27) is verified using a tapered gage or calipers to ensure the slider throat properly engages the chain. Chain thickness (Sections 28–33) is determined using a dial gage with a large-diameter presser foot to span the interlocked elements, applying a standardized weight to avoid distorting the profiles. Chain flatness (Sections 34–39) and chain straightness (Sections 40–44) assess the planar alignment of the zipper by measuring the maximum vertical or horizontal deviation when the zipper is laid freely on a flat surface.
⚙️ Dimensional Stability and Test Conditioning
Longitudinal dimensional change (Sections 51–58) evaluates the stability of the zipper tape following home laundering or drycleaning. Specimens are marked at a precise gage length, subjected to the selected cleaning procedure, and reconditioned. The change in length is calculated as a percentage of the original gage length. All physical tests within this standard require strict adherence to the standard conditioning atmosphere: a temperature of 21 ± 1 °C (70 ± 2 °F) and a relative humidity of 65 ± 2 %.
📊 Summary of Key Test Methods in D2060
| 🟦 Standard Section | 📏 Test Method | 📐 Primary Apparatus | 🎯 Typical Unit |
|---|---|---|---|
| 9 – 14 | Length of Zipper or Parts | Steel scale, tape measure | mm (in) |
| 15 – 20 | Tape Width | Ruler or width gage | mm (in) |
| 21 – 27 | Slider Mouth Width | Tapered gage, calipers | mm (in) |