ASTM D705-99 (2020) pdf free.Standard Specification for Urea-Formaldehyde Molding Compounds.
1.1 This specifcation 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.
1.2.1The properics included in this spcification are those required to identify the types of molding compounds covered. There may be other requirements nccessary to identify particular charactcristics. 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 is use. It is the responsibility of the user of this standard to establish appropriate safety, health, and enviromental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standard ization 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.
2.1 The molding compounds shall be of uniform composition. The apparent density, bulk factor, plasticity, particle size,and color shall be compounded as to conform to the requirements prescribed in this specification.
2.2 Test specimens molded in accordance with Practice D956 shall conform to the requirements prescribed in Table 1.
3. A batch of molding compound shall be considered as a unit of manufacture as prepared for shipment and may consist of a blend of two or more production runs.
4.1 The compound shall be packaged in standard commercial containers, so constructed as to ensure acceptance by common or other carriers for safe transportation at the lowest rate to the point of delivery.
4.2 Shipping containers shall be marked with the name of the compound, type, color, and the quantity contained therein, as defined by the contract or order under which shipment is made, the name of the manufacturer, and the number of the contract or order.
4.3 All packing, packaging， and marking provisions of Practice D3892 shall apply to this specification.ASTM D705 pdf download.