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Norma ASTM D705-99(2020) 1.12.2020 náhľad

Doplňujúce informácie

ASTM D705-99(2020)

Standard Specification for Urea-Formaldehyde Molding Compounds

NORMA vydaná dňa 1.12.2020

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Dostupnosť	SKLADOM
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51.50 €

Informácie o norme:

Označenie normy: ASTM D705-99(2020)
Dátum vydania normy: 1.12.2020
Kód tovaru: NS-1013582
Počet strán: 2
Približná hmotnosť: 6 g (0.01 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM

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Ostatní výrobky z pryže a plastických hmot

Anotácia textu normy ASTM D705-99(2020) :

This specification covers the testing and requirements for two types of compression-molding, thermosetting urea-formaldehyde molding compounds. Type 1 are general purpose molding compounds with alpha-cellulose fillers, while, Type 2 are general purpose molding compounds with cellulose fillers other than alpha-cellulose. The molding compounds shall be of uniform composition, and the apparent density, bulk factor, plasticity, particle size, and color shall be compounded as to conform to the requirements prescribed herein. Also, sampled test specimens shall be examined and conform correspondingly to the following physical requirements: specific gravity; flexural strength; impact resistance; water absorption; dielectric strength; and arc resistance.

Keywords:
formaldehyde, molding compounds (thermosetting), urea-formaldehyde,, ICS Number Code 83.140.99 (Other rubber and plastic products)

Doplňujúce informácie

1. Scope

1.1?This specification covers compression molding thermosetting, urea-formaldehyde molding compounds as further defined in 3.1.

1.2?The values stated in SI units are to be regarded as the standard.

Note 1:?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. Transfer or injection molding will usually result in different physical and electrical characteristics than compression molding.

1.3?The following safety hazards caveat pertains only to the test method portion, Section 7, 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

Note 2:?ISO 2112-1977(E) is similar but not equivalent to this specification. Product classification and characterization are not the same.

1.4?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

D149-20	Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
ISO 2112-1977(E)	Plastics--Aminoplastic Moulding Materials--Specification Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
D256-23e1	Standard Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics (Includes all amendments and changes 4/7/2023).
D495-22	Standard Test Method for High-Voltage, Low-Current, Dry Arc Resistance of Solid Electrical Insulation
D570-22	Standard Test Method for Water Absorption of Plastics
D618-21	Standard Practice for Conditioning Plastics for Testing
D790-17	Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
D792-20	Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D956-87	Practice for Compression Molding Specimens of Amino Molding Compounds (Withdrawn 1992)
D3892-15(2020)	Standard Practice for Packaging/Packing of Plastics

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