1、Designation: D4670 17Standard Test Method forPolyurethane Raw Materials: Determination of SuspendedMatter in Polyols1This standard is issued under the fixed designation D4670; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea
2、r of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method covers a procedure for visual inspec-tion to determine the presence of insoluble foreign materi
3、al inpolyols.1.2 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NO
4、TE 1There is no known ISO equivalent to this standard.2. Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to Plastics3. Terminology3.1 Terminology in this test method is in accordance withTerminology D883.4. Significance and Use4.1 This test method is suitable as a quality control o
5、rspecification test.5. Procedure5.1 Invert a colorless, transparent glass bottle containing thewell-mixed sample and examine by transmitted light for thepresence of suspended matter.6. Report6.1 Report the presence or absence of suspended matter.7. Precision and Bias7.1 No statement is made about th
6、e precision or the biassince this test method merely states whether suspended matteris detected or not.8. Keywords8.1 polyols; polyurethane raw materials; suspended matterSUMMARY OF CHANGESCommittee D20 has identified the location of selected changes to this standard since the last issue(D4670 07(20
7、12)1) that may impact the use of this standard. (March 1, 2017)(1) Modified 7.1 to provide clearer instruction.1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.22 on Cellular Materials -Plastics and Elastomers. It was r
8、ecommended to ASTM by the Center for thePolyurethanes Industry Polyurethane Raw Material Analysis Workgroup.Current edition approved March 1, 2017. Published March 2017. Originallyapproved in 1987. Last previous edition approved in 2012 as D4670 07(2012)1.DOI: 10.1520/D4670-17.2For referenced ASTM s
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