1、 ASTM D3490 0 m 0759530 007b075 4 m -(I)Designation:D 3490-80(Reapproved 1990)Standard Specification for Flexible Cellular Materials-Bonded Urethane Foam This standard is issued under the fixed designation D 3490;the number immediately following the designation indicates the year of original adoptio
2、n or,in the case of revision,the year of last revision.A number in parentheses indicates the year oflast reapproval.A superscript epsilon(c)indicates an editorial change since the last revision or reapproval.1.Scope 1.1 This specification covers the physical properties of bonded flexible urethane fo
3、am used for cushioning,1.2 Bonded urethane foam is made by combining a urethane or other suitable binder to small pieces of urethane foam,molding,and curing into suitable shapes.1.3 The values stated in SI units are to be regarded as the standard.2.Referenced Documents 2,l ASTM Standard:D 3574 Metho
4、ds of Testing Flexible Cellular Materials-2.2 Orher Documents:HUD/FHA Use of Materials Bulletin No.47a,July 8,Fed.Spec.L-C-O01369(GSA/FSS)Cushion,Carpet and Slab,Bonded,and Molded Urethane Foams2 19713 Rug,Bonded Urethane 3.Classification 3.1 This specification places primary emphasis on the physica
5、l properties of bonded-flexible urethane foam(Table 1).3.2 Grades-Table 1 provides for five uncored bonded urethane(UBU)grades based on indentation load deflection hardness.3.3 Additional Requrement-All products sold under the provisions of this specification must comply with the re-quirements for e
6、xtractable color,odor,and cleanliness.4.Basis of Purchase described by this specification shall identify:4.1 Purchase orders for,or inquires about,materials 4,l.1 ASTM designation D 3490,4.1.2 Required grade,4.1.3 Particle size and shape,if choice is available(6.2),4.1.4 If necessary,such other requ
7、irements as may be and agreed upon between the purchaser and the seller.5.Materials and Manufacture 5,l Materials supplied under this specification shall be I This specification is under the jurisdiction of ASTM Committee D-11 on Rubber and is the direct responsibility of Subcommittee D11.33 on Flex
8、ible Cellular Materials.Current edition approved a t,31,1980.Published December 1980.Originally published as D 3490-76.Last previous edition D 3490-76.Anniral Book of ASTM Slandards,Vol 09.02.3 Available from the Department of Housing and Urban Development,451 7th Available from the Superintendent o
9、f Documents U.S.Government Printing SI.,S.W.,Washington,DC 20410.Ofice,Washington,DC 20402.bonded flexible urethane foam.5.2 Materials shall be of uniform composition and free of hard spots and obvious visible defects.5.3 The binder used shall be a urethane-type,or other suitable type,with sufficien
10、t solid content to allow the finished product to meet physical requirements of this specification.Materials may be added that will reduce the.viscosity and improve the wetting characteristics of the urethane polymer.Bonded-flexible urethane foam of good commercial quality usually has a minimum of 8%
11、urethane binder.5.4 These materials may contain colorants,but such additives shall not bleed or alter the ability of the materials to meet the requirements of this specification.Such bleeding shall be determined by the method described in 7.1.2.No more than a trace of color in one or more reagents s
12、hail be allowed.5.5 Cleanliness-Adulterants such as dirt,tramp metal,wood chips,paper,fabric,etc.shall not be allowed.In the event of dispute,bonded foam shall be tested as described in 7.1.3,and the debris calculated as a weight percent.A maximum of 1%debris is permitted.6.Physical Requirements 6.1
13、 Material requirements are prescribed in Table 1.6.2 When used as carpet cushion in the construction or furnishing of properties eligible for HUD/FHA Mortgage Insurance or Low Rent Public Housing Programs,the material described in this specification shall meet the re-quirements of HUD/FHA Use of Mat
14、erials Bulletin No.47a,dated July 8,1971,In the event of requirements that conflict with this specification,UM 47a shall then govern.When used as carpet and rug cushion for such other federai government jurisdictions as may apply,bonded-flexible ure-thane foam shall be acceptable if it complies with
15、 Federal Specification L-GOO1369(GSA/ESS).In the event of re-quirements which conflict with this specification,L-C-O0 1369 shall be the criteria of acceptance.6.3 Combustibility-Bonded-urethane foam must meet any applicable federal,state,and local regulations for the end use being considered.6.4 The
16、 bonded foam must be free of objectionable odor both when dry and wet,and shall exhibit no tackiness when in contact with solid surfaces.7,Test Methods 7.1 Physical Requirements:7.1.1 Determine the density and the physical require-ments listed in Table 1 in accordance with Method D 3574.7.1.2 Extractable Color-Immerse three samples of ap-proximately 5 g each for 1 h at room temperature in 29 1 NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact A
