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This specification covers two types and three grades of thin biaxially oriented polymeric resin film composed of polyethylene terephthalate (PET, Class A) or polypropylene (PP, Class B) for use in capacitors for electrical equipment. Type I has smooth surfaces, while Type II has at least one rough surface. Each of these types is further subdivided into the following grades: Grade 1, not pre-treated; Grade 2, one side pre-treated to facilitate the vacuum deposition of metal; and Grade 3, both side pre-treated. The physical, mechanical, and electrical requirements for which the polymer films shall be tested on for conformance are as follows: tensile strength and modulus, and break elongation; insulation resistance and conducting paths; permittivity, dissipation factor, and dielectric breakdown voltage; nominal thickness and width; density; melting point; shrinkage; tear and impact strength, and fold endurance; color or clarity; moisture absorption and permeability; oxygen index and permeability; resistance to corrosive agents; heat or solvent resistance, and hygroscopic coefficient of expansion; aqueous extract conductivity; and acidity. Thicknesses of the capacitor films shall be carried out by either the roll weight, ten-sheet stack, or gravimetric methods.
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 thin biaxially oriented polymeric resin film for use in capacitors for electrical equipment. The material is biaxially oriented to improve the tensile properties in the machine (MD) and transverse (TD) directions.
1.2 The values stated in SI units are the standard. The values in parentheses are for information only.
Note 1: This standard resembles IEC 60674–3–2, Specification for plastic films for electrical use, in title only. The content is significantly different.
1.3 The following safety hazards caveat pertains only to the test methods section 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. For specific warning statements see and Table 1 footnote B.
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
D202 Test Methods for Sampling and Testing Untreated Paper Used for Electrical Insulation
D257 Test Methods for DC Resistance or Conductance of Insulating Materials
D374 Test Methods for Thickness of Solid Electrical Insulation
D543 Practices for Evaluating the Resistance of Plastics to Chemical Reagents
D570 Test Method for Water Absorption of Plastics
D756 Practice for Determination of Weight and Shape Changes of Plastics Under Accelerated Service Conditions
D774/D774M Test Method for Bursting Strength of Paper
D882 Test Method for Tensile Properties of Thin Plastic Sheeting
D1004 Test Method for Tear Resistance (Graves Tear) of Plastic Film and Sheeting
D1204 Test Method for Linear Dimensional Changes of Nonrigid Thermoplastic Sheeting or Film at Elevated Temperature
D1434 Test Method for Determining Gas Permeability Characteristics of Plastic Film and Sheeting
D1435 Practice for Outdoor Weathering of Plastics
D1505 Test Method for Density of Plastics by the Density-Gradient Technique
D2176 Test Method for Folding Endurance of Paper by the M.I.T. Tester
D2305 Test Methods for Polymeric Films Used for Electrical Insulation
D2863 Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics (Oxygen Index)
D3417 Test Method for Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry (DSC)
D3420 Test Method for Pendulum Impact Resistance of Plastic Film
D3636 Practice for Sampling and Judging Quality of Solid Electrical Insulating Materials
D3755 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials Under Direct-Voltage Stress
D3985 Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using a Coulometric Sensor
D6054 Practice for Conditioning Electrical Insulating Materials for Testing
E96/E96M Test Methods for Water Vapor Transmission of Materials
E252 Test Method for Thickness of Foil, Thin Sheet, and Film by Mass Measurement
IEC StandardsIEC 60674–3–2 Specification for plastic films for electrical purposes--Part 3: Specifications for individual materials--Sheet 2: Requirements for balanced biaxially oriented polyethylene phthalate (PET) films used for electrical insulation
ICS Number Code 29.035.20 (Plastic and rubber insulating materials)
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ASTM D3664-16, Standard Specification for Biaxially Oriented Polymeric Resin Film for Capacitors in Electrical Equipment, ASTM International, West Conshohocken, PA, 2016, www.astm.orgBack to Top