ASTM D4670-2017 Standard Test Method for Polyurethane Raw Materials Determination of Suspended Matter in Polyols 《聚亚胺酯原材料的标准试验方法 多元醇中悬浮物的测定》.pdf

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

9、tandards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM Int

10、ernational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards

11、, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advi

12、sed that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either

13、reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If

14、 you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individ

15、ual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 172