ASTM D4969-07(2012) - 1.4.2012
 
1. Scope

1.1 This specification covers glass fabric impregnated, coated, and sintered on both sides with PTFE to a nominal thickness of 0.318 mm (0.015 in.) or less.

1.2 The PTFE-coated glass fabric is for electrical, chemical, and mechanical uses.

1.3 The PTFE-coated glass fabric of this specification does not pertain to structural fabric, single-sided PTFE coatings, or materials used for laminates.

1.4 The values stated in SI units as detailed in .

Note 1—There is no ISO standard that covers information included in this specification. The dielectric test is mentioned in ISO 12086-2 and ISO 13000–1 and 2.

 
2. Referenced Documents

D149-25

Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

D257-14(2021)e1

Standard Test Methods for DC Resistance or Conductance of Insulating Materials (Includes all amendments and changes 5/6/2021).

D374-99

Standard Test Methods for Thickness of Solid Electrical Insulation

D579-09

Standard Specification for Greige Woven Glass Fabrics

D618-21

Standard Practice for Conditioning Plastics for Testing

D4441-20(2025)

Standard Specification for Aqueous Dispersions of Polytetrafluoroethylene

IEEE/ASTM SI-10

Standard for Use of the International System of Units (SI): The Modern Metric System

ISO 13000–1 and 2

Plastics--Polytetrafluoroethylene (PTFE) Semi-Finished Products

D751-26

Standard Test Methods for Coated Fabrics

D123-23

Standard Terminology Relating to Textiles

D737-18(2023)

Standard Test Method for Air Permeability of Textile Fabrics

D902-12

Standard Test Methods for Flexible Resin-Coated Glass Fabrics and Glass Fabric Tapes Used for Electrical Insulation (Withdrawn 2020)

D883-26b

Standard Terminology Relating to Plastics (Includes all amendments and changes 8/24/2026).

D3892-15(2020)

Standard Practice for Packaging/Packing of Plastics

D1424-25

Standard Test Method for Tearing Strength of Fabrics by Falling-Pendulum (Elmendorf-Type) Apparatus