This specification deals with the classification, requirements, and testing of compression molding, thermosetting, unsaturated polyester molding compounds. Covered here are the following types of polyester molding compounds: Type 1 - general-purpose granular materials with mineral fillers; Type 2 - general-purpose granular materials with mineral and cellulosic fillers, and having improved mechanical strength; Type 3 - general-purpose putty-type materials with mineral fillers; Type 4 - putty-type materials with mineral fillers and having superior electrical properties; Type 5 - high-impact glass-fiber filled materials in mat form, and has good electrical properties; and Type 6 - high-impact glass-fiber filled materials in putty form. Sampled specimens shall be tested and conform accordingly to material requirements such as specific gravity, flexural strength, modulus of elasticity in flexure, Izod impact resistance, arc resistance, and water absorption.
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 compression molding, thermosetting, unsaturated polyester molding compounds as further defined in 3.1.
1.2 The values stated in SI units are to be regarded as the standard.
—The properties included in this specification are those required to identify the types of molding compounds covered. There may be other requirements necessary to identify particular characteristics. These will be added to the specification as their inclusion becomes generally desirable and the necessary test data and methods become available.
—ISO 3672–1: 1979(E) is similar but not equivalent to this specification. Product classification and characterization are not 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.
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
D790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D3892 Practice for Packaging/Packing of Plastics
ISO3672–1:1979 Plastics--Unsaturated Polyester Resins--Part 1: Designation Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.
molding compounds (thermosetting); polyester; unsaturated polyester;
ICS Number Code 83.140.99 (Other rubber and plastic products)
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Citing ASTM Standards
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