Abstract

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.

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.

Significance and Use

1. Scope

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Other Standard

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

D229 Test Methods for Rigid Sheet and Plate Materials Used for Electrical Insulation

D256 Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics

D495 Test Method for High-Voltage, Low-Current, Dry Arc Resistance of Solid Electrical Insulation

D570 Test Method for Water Absorption of Plastics

D618 Practice for Conditioning Plastics for Testing

D638 Test Method for Tensile Properties of Plastics

D648 Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position

D695 Test Method for Compressive Properties of Rigid Plastics

D790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials

D796 Practice for Compression Molding Test Specimens of Phenolic Molding Compounds

D883 Terminology Relating to Plastics

D1896 Practice for Transfer Molding Test Specimens of Thermosetting Compounds

D3419 Practice for In-Line Screw-Injection Molding Test Specimens From Thermosetting Compounds

D3636 Practice for Sampling and Judging Quality of Solid Electrical Insulating Materials

D3638 Test Method for Comparative Tracking Index of Electrical Insulating Materials

D4350 Test Method for Corrosivity Index of Plastics and Fillers

D4697 Guide for Maintaining Test Methods in the Users Laboratory

E994 Guide for Calibration and Testing Laboratory Accreditation Systems General Requirements for Operation and Recognition

E1224 Guide for Categorizing Fields of Capability for Laboratory Accreditation Purposes

Underwriters Laboratory Standard

Keywords

diallyl phthalate plastics; epoxy plastics; melamine-formaldehyde plastics; molding compounds; phenolic plastics; plastics; polyester plastics; silicone resin molding compounds;

ICS Code

ICS Number Code 83.040.01 (Raw materials for rubber and plastics in general)

DOI: 10.1520/D5948-05R12

ASTM International is a member of CrossRef.

ASTM D5948