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This specification covers three types and several grades of unsintered extruded films or tapes manufactured from virgin, unpigmented polytetrafluoroethylene in specified nominal thicknesses. Having different apparent densities, the three types of tapes covered here are: thread seal tapes (Type I); low density tapes (Type II); and wire and cable tapes (Type III). Individual grades shall adhere accordingly to thickness, tensile strength at yield, and elongation at maximum strength requirements.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers unsintered extruded films or tapes manufactured from virgin, unpigmented polytetrafluoroethylene, in nominal thickness from 0.025 to 0.51 mm (0.001 to 0.020 in.), which are >99 % PTFE in composition.
Note 1—For unsintered pigmented products, refer to Specification D7193.
1.1.1 The use of recycled PTFE for production of unsintered extruded films or tapes has not been identified at this time. When commercial usable processes and materials are available, this specification will be revised to include recycled materials.
1.3 The following precautionary statement pertains only to the test method portion, Section 8 of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Note 2—Although this specification and ISO/DIS 13000-1 and ISO/DIS 13000-2 differ in approach or detail, data obtained relating to specific properties, using either are technically equivalent.
Note 2—Although this specification and ISO/DIS 13000-1 and ISO/DIS 13000-2 differ in approach or detail, data obtained relating to specific properties, using either are technically equivalent.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
D150 Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation
D257 Test Methods for DC Resistance or Conductance of Insulating Materials
D618 Practice for Conditioning Plastics for Testing
D882 Test Method for Tensile Properties of Thin Plastic Sheeting
D883 Terminology Relating to Plastics
D1600 Terminology for Abbreviated Terms Relating to Plastics
D1711 Terminology Relating to Electrical Insulation
D3892 Practice for Packaging/Packing of Plastics
D6040 Guide to Test Methods for Unsintered Polytetrafluoroethylene (PTFE) Extruded Film or Tape
D7193 Specification for Unsintered Pigmented Polytetrafluoroethylene (PTFE) Extruded Film or Tape
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
ISO StandardISO13000-2 Plastics--Polytetrafluoroethylene (PTFE) Semi-Finished Products--Part 2: Preparation of Test Specimens and Determination of Properties Designation
ICS Number Code 83.140.10 (Films and sheets)
UNSPSC Code 13111200(Films)