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D6337-98 – Standard Test Method Technical Guide
📐 Scope and Terminology Overview
This standard practice, designated D6337-98 (Reapproved 2019), covers the dimensions, terminology, and characteristics of woven paint applicator fabrics. It is intended to standardize the physical characterization methods for these fabrics, ensuring consistency in quality and performance evaluation. The practice does not serve as a definitive analytical method for deformulation but rather provides essential guidelines for producers and users.
| 📖 Term | 📝 Definition |
|---|---|
| Backcoating | A resin coating applied to the back of fabric for stability. |
| Backing | A set of warp yarns forming the fabric base. |
| Dyelot | A specific quantity processed together for ranking. |
| Filling | Yarn interlacing with warp ends at right angles. |
| Pick | One filling yarn. |
| Pile | Additional warp yarns creating loops on the surface. |
⚙️ Standard Test Methods and Properties
Physical characterization of woven paint applicator fabrics involves several test methods referenced in this standard. These methods provide reliable data on key properties such as thickness, width, yarn count, and mass per unit area. All testing should be performed in accordance with Practice D1776 for conditioning and testing textiles.
| 🟦 Standard | 📏 Test Method | 🎯 Measured Property |
|---|---|---|
| D1777 | Thickness of Textile Materials | Thickness under specified pressure |
| D3774 | Width of Textile Fabric | Fabric width in inches or yards |
| D3775 | End (Warp) and Pick (Filling) Count | Number of ends and picks per unit length |
| D3776 | Mass Per Unit Area (Weight) of Fabric | Weight in ounces per square yard or g/m² |
💡 Tip: Always condition fabric samples according to Practice D1776 at standard atmospheric conditions (70°F and 65% relative humidity) before testing to ensure accurate and reproducible results.
❓ Frequently Asked Questions
🔍 What is the scope of ASTM D6337?
It covers the dimensions, terminology, and characteristics important for woven paint applicator fabrics, describing methods for determining these parameters.
💡 How is a dyelot defined in this standard?
A dyelot is a specific quantity processed together that can be comparatively ranked within or among other dyelots.
⚡ What is a pick glass used for?
A pick glass is an instrument with a magnifying lens and a viewing field of one square inch used to identify fabric construction, such as yarn count.
📌 Why is conditioning important for testing woven fabrics?
Conditioning ensures that the fabric reaches equilibrium with the standard atmosphere, providing consistent and comparable test results across different samples and laboratories.