1、Designation:D 3770 91Standard Specification forFlexible Cellular MaterialsHigh-Resilience PolyurethaneFoam(HR)and Combustion Modified High Resilience(CMHR)Polyurethane Foam1This standard is issued under the fixed designation D 3770;the number immediately following the designation indicates the year
2、oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the minimum physical proper-ties and
3、other requirements for high-resilience polyurethanefoam(HR)and combustion modified high resilience polyure-thane foams(CMHR).1.2 Combustion modified high resilience polyurethanefoams are high resilience foams that have been modified tomeet specific flammability requirements.1.3 This specification in
4、cludes references to governmentregulations for burning characteristics of flexible cellularmaterials used in specific applications(see Table 1).2.Referenced Documents2.1 ASTM Standards:D 3453 Specification for Flexible Cellular MaterialsUrethane for Furniture and Automotive Cushioning,Bed-ding,and S
5、imilar Applications2D 3574 Test Methods for Flexible Cellular MaterialsSlab,Bonded,and Molded Urethane Foams2D 3675 Test Method for Surface Flammability of FlexibleCellular Materials Using a Radiant Heat Energy Source22.2Other Documents:DOT MVSS 3023DOC FF 4723CAL.TB 1174CAL.TB 1334NFPA 2605BSI 5852
6、6FAA Part 25.853,Paragraph 6,Appendix F3FAA Oil Burner Test33.Classification3.1 This specification covers two grades of flexible high-resilience polyurethane foam material that may be selected foruse according to load-bearing and other minimum physicalproperties(see Table 2).Generally,Grade HR-I is
7、used forfurniture applications and Grade HR-II is used for furnitureapplications and mattresses.4.Ordering Information4.1 Any product represented as complying with this speci-fication shall meet all the requirements listed herein for itsparticular classification.4.2 Orders for material under this sp
8、ecification shall includethe following information:4.2.1 Type I or II of HR required as listed in this specifica-tion,4.2.2 Grade number and quality as listed in Table 1 ofSpecification D 3453,4.2.3 Dynamic fatigue performance,if required,as listed inTable 2 of Specification D 3453,4.2.4 Dimension o
9、f foam,and4.2.5 Combustibility requirements,if any,as listed in Table1.5.Physical Requirements5.1 The material shall conform to the requirements forphysical properties prescribed in Table 2.6.Test Methods6.1 The physical tests shall be in accordance with MethodsD 3574.1This specification is under th
10、e jurisdiction of ASTM Committee D-20 onPlastics and is the direct responsibility of Subcommittee D20.22 on CellularPlastics.Current edition approved Oct.15,1991.Published April 1992.Originallypublished as D 3770 79.Last previous edition D 3770 79(1985).2Annual Book of ASTM Standards,Vol 09.02.3Avai
11、lable from Superintendent of Documents,U.S.Government PrintingOffice,Washington,DC 20402.4Available from California Bureau of Home Furnishings,3485 Orange GroveAve.,North Highlands,CA 95660.5Available from National Fire ProtectionAssociation,1 Batterymarch Park,P.O.Box 9101,Quincy,MA 02269.6Availabl
12、e from British Standards Institute,2 Park Street,London,EnglandW1A 2B5.TABLE 1 Applicable Government Regulations for SpecifiedApplicationsTypesApplicationRegulation1AutomotiveDOT MVSS 3022Mattress and CushionDOC FF 4723Mattress and CushionCAL.TB 1174Mattress and CushionCAL.TB 1335Mattress and Cushio
13、nNFPA 2606Mattress and CushionNFPA 2607Mattress and CushionBSI 58528AviationFAA Part 25.853 paragraph 6 Append.F9AviationFAA Oil Burner test10MiscellaneousASTM D36751AMERICAN SOCIETY FOR TESTING AND MATERIALS100 Barr Harbor Dr.,West Conshohocken,PA 19428Reprinted from the Annual Book of ASTM Standar
14、ds.Copyright ASTMNOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.7.Inspection7.1 Inspection of the material shall be agreed upon inwriting between the purchaser and the seller as part of
15、thepurchase contract.7.2 Testing for conformance to requirements shall be donein accordance with the appropriate sections of MethodsD 3574.The specific test methods in this reference to be usedfor each test shall be as listed in Table 2.8.Retest and Rejection8.1 If any failure occurs,the materials m
16、ay be retested toestablish conformity in accordance with agreement betweenthe purchaser and the seller.9.Packaging,Marking,and Labeling9.1 PackagingThe material shall be packed in standardcommercial containers,so constructed as to ensure acceptanceby common or other carriers for safe transportation at thelowest rate to the point of delivery,unless otherwise specifiedin the contract or order.9.2 MarkingThe shipping container shall be marked withthe name,grade,and quality of material in accordance