1、1-LW-.1.,._.I.C.-.IND-STD ASTM D234L-Bl NOTICE L 5b 9 7777778 0002784 7 I NOlZCE O-I I ADOPTION I I.ADOPTZON NOTICE I 2 October 1989 for A r J r H D 2341-81 June 26,1981 A S T P I D 2341-81 was adopted on 2 October 1989 and is approved far use by the Department of efense(Doll).existing regulations.S
2、tock Point,Naval Publications and Forms Center,5801 Tabor Avenue,VhlladelPhla,PA ASIPI has.furnished the clearance required by Copies of this document are stocked by DOU Jingle 19120,for issue to DoD activities only.All other.requestoks must obtain documents from:ASr H 191 6.Race Street Philadelphia
3、,PA 19103 Title OF Document:Standard Specification for Rigid Urethane Foam Date of Specific Issue Adopted:June 26,1981 Releasing Mon-Government Standards Body:ASTN Custodians:Navy-YU Air Force-99 A m y -ME Heview Activities:Army-C t Navy-SH Air Force-84 User Activities:Navy-CG,NC Plilitary Coordinat
4、ing Activity:Navy-YD(Project 5640-0474)I FSC 5640 DISTRlBUrION STAILHENT A.un1 imi ted.Approved for public releas;distribution is.THIS DOCUMENT CONTAINS PAGES.NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the
5、 latest information.7 N-u-17 ASTM D2341 81 E 0757510 0025385 7 rn =rk Designation:D 2341-81 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race St.,Philadelphia,Pa.19103 Reprinted from the Annual Book of ASTM Standards,Copyright ASTM If not listed in the current combined index,will appear in the ne
6、xt edition.Standard Specification for RIGID URETHANE FOAM This standard i s issued under the fixed designation D2341;the number immediately following the designationindicates the year of onginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year
7、of last reapproval.A superscript epsilon(E)indicates an editonalchange since the last revision or reapproval.1.scope.1 This specification covers a class of rigid cellular materials known as urethane foam or rigid cellular materials made from urethane raw materials where other types of repeated struc
8、tural units are present such as polycarbo-diimide or polyisocyanurate.Urethane foam may be generally defined as an expanded cel-lular product produced by a catalyzed reaction of polyisocyanates with polyhydroxy com-pounds.The detail requirements of this speci-fication apply to the core material of t
9、he sprayed,laminated,molded,or foamed part.In the event that the product does not lend itself to testing of the core,specific test samples shall be agreed upon by the seller and the purchaser.1.2 The values stated in SI units are to be regarded as the standard.NOTE I-For specific applications refer
10、to ASTM Committee D-10 on Packaging,C-16 on Thermal and Cryogenic Insulating Materials,(i n particular ASTM SpecXicafion C591 for Rigid Preformed Cel-lular Urethane Insulation),and F-7 on Aerospace Industry Methods.2.Applicable Documents 2.1 ASTM Standards:C 177 Test for Thermal Conductivity of Ma-t
11、erials by Means of the Guarded Hot Piate C 203 Test for Breaking Load and Calculated Flexural Strength of Preformed Block-Type Thermal Insulation3 C273 Shear Test in Flatwise Plane of Flat Sandwich Constructions or Sandwich C 355 Test for Water Vapor Transmission of Thick Materials3 C 518 Test for S
12、teady-State Thermal Trans-mission Properties byMeans of Heat Flow Meter3 cores4 D 149 Test for Dielectric Breakdown Voltage and Dielectric Strength of Electrical Insu-lating Materials at Commercial Power Frequencies5 D257 Tests for D-C Resistance or Conduct-ance of Insulating Materials6 D 790 Test f
13、or Flexural Properties of Plastics and Electrical insulating Material5 D 1621 Test for Compressive Properties of Rigid Cellular Plastics D 1622 Test for Apparent Density of Rigid Cellular Plastics D 1623 Test for Tensile and Tensile Adhe-sion Properties of Rigid Cellular Plastics D 1673 Test for Die
14、lectric Constant and Dis-sipation Factor of Expanded Cellular Plas-tics Used for Electrical Insulation D 1898 RecommendedPractice for Sampling of Piastics D2126 Test for Response of Rigid Cellular Plastics to Thermal and Humid Aging D2842 Test for Water Absorption of Rigid Cellular Plastics D 2856 T
15、est for Open Cell Content of Rigid Cellular Plastics by the Air Pycnometer D2863 Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics(Oxygen Index)5 D 3892 Practice for Packaging/Packing of Pastics5 This specification is under the jurisdiction of ASTM Committee D-
16、20 on Plastics and is the direct responsibility of Subfommittee D 20.22 on Cellular Plastics.Current edition approved June 26,1981.Published De-cember 1981.Originally published as D2341-65 T.Last previous edition D 2341-78.Annual Book of ASTM Standarh,Parts 18,35,and 44.AnnuaIBook o f ASTM Standards,Part 18.:Annual Book of ASTM Standards,Part 25.Annual Book of ASTM Standards,Part 35.Annual Book of ASTM Standards,Part 36.ASTM D2341 81 IJ 0759510 00251b O 2.2 Military Standard MIL-STD-105 Sampling
