ASTM D2305 - 18
Standard Test Methods for Polymeric Films Used for Electrical Insulation
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Significance and Use
6.1 Many electrical and physical properties of films vary significantly with changes in temperature and humidity. Properties of thin plastic films can change very rapidly; therefore, the specimen needs to be in the stated conditioning environment when the test is being performed. When the test is performed in a different environment, note these conditions and the time of exposure to this new environment.
1. Scope
1.1 These test methods cover the testing of homogeneous organic polymer films not over 2.4 mm (95 mils) thick that are to be used for electrical insulation.
1.2 These test methods are not necessarily applicable to testing films in combinations with a coating, another film, or with other types of substrate, such as fabrics or papers.
1.3 The values stated in SI units are the standard. The values in parentheses are provided for information only.
1.4 The procedures appear in the following sections:
| Procedure | Sections |
| Conditioning | 6 and 7 |
| Dielectric Breakdown Voltage & Dielectric Strength | 21 to 26 |
| Extractables | 65 to 70 |
| Heat-Seal Strength | 59 to 64 |
| Permittivity and Dissipation Factor | 42 to 47 |
| Resistance Method for Measuring the Tendency to |
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| Corrode Metals | 38 to 41 |
| Sampling | 5 |
| Shrinkage | 48 to 53 |
| Strain Relief | 13 to 20 |
| Surface Resistivity | 27 to 31 |
| Tensile Properties | 12 |
| Thickness | 8 to 11 |
| Volume Resistivity | 32 to 37 |
| Water Absorption | 53 to 58 |
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: These test methods are similar to IEC 60674–2.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
IEC Standard
Publication 60674–2 Specification for Plastic Films for Electrical Purposes Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.ASTM Standards
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
D374 Test Methods for Thickness of Solid Electrical Insulation (Metric) D0374_D0374M
D570 Test Method for Water Absorption of Plastics
D882 Test Method for Tensile Properties of Thin Plastic Sheeting
D883 Terminology Relating to Plastics
D1000 Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applications
D1531 Test Methods for Relative Permittivity (Dielectric Constant) and Dissipation Factor by Fluid Displacement Procedures
D1676 Test Methods for Film-Insulated Magnet Wire
D1711 Terminology Relating to Electrical Insulation
D5032 Practice for Maintaining Constant Relative Humidity by Means of Aqueous Glycerin Solutions
D6054 Practice for Conditioning Electrical Insulating Materials for Testing
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ICS Code
ICS Number Code 29.035.20 (Plastic and rubber insulating materials)
UNSPSC Code
UNSPSC Code 13111200(Films)
Referencing This Standard
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DOI: 10.1520/D2305-18
Citation Format
ASTM D2305-18, Standard Test Methods for Polymeric Films Used for Electrical Insulation, ASTM International, West Conshohocken, PA, 2018, www.astm.org
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