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D3369-01 – Standard Test Method Technical Guide
📐 Product Classification and Dimensions
This specification covers PTFE-fluorocarbon resin cast film with thicknesses from 0.025 to 0.127 mm (0.001 to 0.005 in). The film is classified as one type under Section 4. Length and width are subject to agreement between purchaser and manufacturer, with tolerances of +6.35 mm, -0 mm. Thickness tolerances are specified in Table 2 of the standard and must be measured within a temperature range of 23 to 30°C. SI units are regarded as standard, with units in parentheses for information only.
| 📏 Parameter | 🟦 Specification |
|---|---|
| Thickness Range | 0.025 to 0.127 mm (0.001 to 0.005 in) |
| Length/Width Tolerance | +6.35 mm, -0 mm |
| Measurement Temperature | 23 to 30°C (73.4 to 86°F) |
💡 When selecting a PTFE film, consider that properties like tensile strength and elongation differ between cast film, skived tape, and other forms. Review standards D3308 and D4895 for guidance. Note that no similar ISO standard exists.
⚙️ Physical Requirements and Testing
The material shall meet the property values of Table 1, which includes key characteristics such as tensile strength and elongation at break. The film is natural in color, varying from cloudy to milky transparent with thickness. It must be essentially free of blisters, wrinkles, cracks, and other surface defects. One or both sides receive surface treatment to enable adhesive or ink bonding. Conditioning of test specimens must follow Practice D618. Testing methods such as D149 for dielectric strength, D374 for thickness, D792 for density, and D1389 for proof-voltage are referenced for evaluation.
| 📐 Property | 🎯 Requirement |
|---|---|
| Color | Natural, cloudy to milky transparent |
| Surface Quality | Free from blisters, wrinkles, cracks |
| Surface Treatment | One or both sides for adhesion/printing |
| Conditioning | Per Practice D618 |
⚠️ This standard does not purport to address all safety concerns. Users must establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
❓ Frequently Asked Questions
🔍 What is the intended thickness range of PTFE cast film? The standard covers film from 0.025 to 0.127 mm (0.001 to 0.005 in).
💡 What are the tolerances for length and width? Length and width tolerances are specified as +6.35 mm, -0 mm.
⚡ What surface characteristics are required? The film must be essentially free of defects like blisters and cracks, with surface treatment applied for adhesion.
📌 Which test methods are referenced for property evaluation? Methods include D149, D374, D618, D792, D1389, and D3892 for various tests.