ASTM D5948-05(2020)

Standard Specification for Molding Compounds, Thermosetting

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STANDARD published on 1.12.2020

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The information about the standard:

Designation standards: ASTM D5948-05(2020)
Publication date standards: 1.12.2020
SKU: NS-1013579
The number of pages: 20
Approximate weight : 60 g (0.13 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Raw materials for rubber and plastics in general

Annotation of standard text ASTM D5948-05(2020) :

This specification covers the basic properties of thermoset molding plastic compounds and the test methods used to establish the properties. The plastic compounds shall be a resin, cellulose-filled or mineral/glass-filled phenolic, melamine, polyester, diallyl iso-phthalate, diallyl ortho-phthalate, silicone, or epoxy. Standard test specimens shall be in the as-received condition or shall be conditioned before testing by humidity, immersion, or temperature conditioning. The specimens shall undergo mechanical or physical qualification tests which shall conform to the following properties: compressive strength; dimensional stability; flexural strength; heat deflection temperature; heat resistance; impact strength; tensile strength; and water absorption. Electrical qualification tests shall be conducted; wherein, the specimens shall comply with the following requirements: arc resistance; dielectric breakdown; dielectric constant; dielectric strength; dissipation factor; surface resistance; comparative track index; volume resistance; and water extract conductance. Tests for combustion qualification shall also be performed to determine the flame resistance ignition time, burning time, flammability, and toxicity requirements. Batch acceptance tests shall be conducted as well to ensure the quality conformance of the specimens.

Keywords:
diallyl phthalate plastics, epoxy plastics, melamine-formaldehyde plastics, molding compounds, phenolic plastics, plastics, polyester plastics, silicone resin molding compounds,, ICS Number Code 83.040.01 (Raw materials for rubber and plastics in general)

Additional information

Significance and Use

4.1?This specification is a revision of STD MIL-M-14H, Specification for Molding Compound, Thermosetting, retaining the MIL-M-14H material designations and property requirements while conforming to ASTM form and style. It is intended for qualification and batch acceptance for materials used by government and industry, and is intended as a direct replacement for MIL-M-14H.

1. Scope

1.1?This specification covers the basic properties of thermoset molding compounds and the test methods used to establish the properties.

1.2?ClassificationMolding thermosetting plastic compounds shall be of the following resins and are covered by the individual specification sheets (see 5.1 and Annex A1 Annex A8).

Resin

Phenolic, cellulose filled

Phenolic, mineral/glass filled

Melamine

Polyester

Diallyl iso-phthalate

Diallyl ortho-phthalate

Silicone

Epoxy

Note 1:?There is no known ISO equivalent to this standard.

1.3?Order of PrecedenceIn the event of a conflict between the text of this specification and the references cited in Section 2 (except for related specification sheets), the text of this specification takes precedence. Nothing in this specification, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

1.4?The values stated in SI units are to be considered standard.

1.5?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

D229-19e1	Standard Test Methods for Rigid Sheet and Plate Materials Used for Electrical Insulation (Includes all amendments and changes 3/23/2023).
D495-22	Standard Test Method for High-Voltage, Low-Current, Dry Arc Resistance of Solid Electrical Insulation
E994-95	Standard Guide for Calibration and Testing Laboratory Accreditation Systems General Requirements for Operation and Recognition (Withdrawn 2004)
D4697-95(2001)	Standard Guide for Maintaining Test Methods in the User's Laboratory (Withdrawn 2009)
D4350-16(2022)	Standard Test Method for Corrosivity Index of Plastics and Fillers
DDC AD 297457	Procedure for Determining Toxicity of Synthetic Compounds Available from National Technical Information Service (NTIS), U.S. Department of Commerce, 5285 Port Royal Rd., Springfield, VA 22161.
E1224-94	Standard Guide for Categorizing Fields of Capability for Laboratory Accreditation Purposes (Withdrawn 2002)
UL 94	Tests for Flammability of Plastic Materials for Parts in Devices and Appliances
D618-21	Standard Practice for Conditioning Plastics for Testing
D638-22	Standard Test Method for Tensile Properties of Plastics
D648-18	Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
D149-20	Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
D150-22	Standard Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation
D570-22	Standard Test Method for Water Absorption of Plastics
D256-23e1	Standard Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics (Includes all amendments and changes 4/7/2023).
D695-23	Standard Test Method for Compressive Properties of Rigid Plastics
D790-17	Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
D796-87A	Practice for Compression Molding Test Specimens of Phenolic Molding Compounds (Withdrawn 1992)
D883-24	Standard Terminology Relating to Plastics
D1896-09	Standard Practice for Transfer Molding Test Specimens of Thermosetting Compounds
D3419-12(2019)	Standard Practice for In-Line Screw-Injection Molding Test Specimens From Thermosetting Compounds
D3636-19	Standard Practice for Sampling and Judging Quality of Solid Electrical Insulating Materials
D3638-21e1	Standard Test Method for Comparative Tracking Index of Electrical Insulating Materials (Includes all amendments and changes 2/2/2022).

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