1、Designation: D7425/D7425M 11Standard Specification forSpray Polyurethane Foam Used for Roofing Applications1This standard is issued under the fixed designation D7425/D7425M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year
2、of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the types and physical proper-ties of spray polyurethane foam (SPF) for use in SPF roofin
3、gapplications.1.2 This specification does not provide guidance for appli-cation.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of th
4、e other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 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 prac
5、tices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C165 Test Method for Measuring Compressive Propertiesof Thermal InsulationsC168 Terminology Relating to Thermal InsulationC177 Test Method for Steady-State Heat Flux Measure-ments
6、 and Thermal Transmission Properties by Means ofthe Guarded-Hot-Plate ApparatusC518 Test Method for Steady-State Thermal TransmissionProperties by Means of the Heat Flow Meter ApparatusC1363 Test Method for Thermal Performance of BuildingMaterials and Envelope Assemblies by Means of a HotBox Apparat
7、usD1079 Terminology Relating to Roofing and WaterproofingD1621 Test Method for Compressive Properties of RigidCellular PlasticsD1622 Test Method for Apparent Density of Rigid CellularPlasticsD1623 Test Method for Tensile and Tensile Adhesion Prop-erties of Rigid Cellular PlasticsD2126 Test Method fo
8、r Response of Rigid Cellular Plasticsto Thermal and Humid AgingD2842 Test Method for Water Absorption of Rigid CellularPlasticsD6226 Test Method for Open Cell Content of Rigid CellularPlasticsE96/E96M Test Methods for Water Vapor Transmission ofMaterials3. Terminology3.1 DefinitionsFor definitions o
9、f terms used in this speci-fication, refer to Terminologies D1079 and C168.3.1.1 knit linealso called lift line. They are interchange-able terms describing the adhesion plane where one pass issprayed over another.4. Significance and Use4.1 This specification covers spray polyurethane foam(SPF) that
10、is used as part of a SPF roofing system.5. Classification5.1 This specification covers SPF currently commerciallyavailable as described by the physical property requirements inTable 1.5.2 SPF shall be manufactured with HFC, hydrocarbonor/and water blowing agents. It is classified into two types asfo
11、llows:5.2.1 Type IThermal resistance, R value, is equal to orgreater than 0.98 Km2/W 5.6Fft2h/Btu per 25.4 mm 1 in.thickness.5.2.2 Type IIThermal resistance, R value, is between 0.72and 0.98 Km2/W 4.1 and 5.6Fft2h/Btu per 25.4 mm 1 in.thickness.6. Ordering Information6.1 Orders for materials purchas
12、ed under this specificationshall include the following:6.1.1 ASTM designation, year of issue, and title.6.1.2 Type (see 5.2).6.1.3 Sampling, if different (see Section 9).1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility o
13、f Subcommittee D08.06on Spray Polyurethane Foam Roof Systems.Current edition approved Jan. 1, 2011. Published February 2011. Originallyapproved in 2008. Last previous edition approved in 2008 as D7425 08. DOI:10.1520/D7425_D7425M-11.2For referenced ASTM standards, visit the ASTM website, www.astm.or
14、g, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.1.4 If pack
15、aging is other than specified (see 13.1).6.1.5 If marking is other than specified (see 13.4).7. Materials and Manufacture7.1 SPF is produced by the catalyzed polymerization ofpolyisocyanates in the presence of polyhydroxyl compounds,with the addition of other compounds such as stabilizers andblowing
16、 agents.7.2 The materials shall be capable of being mixed andapplied using commercially available polyurethane sprayequipment.8. Physical Requirements8.1 SPF used in roofing applications shall meet the mini-mum physical property values as shown in Table 1.8.2 Other physical properties may be require
17、d, as agreedupon by the purchaser and the manufacturer.9. Sampling9.1 Sampling for inspection tests, if required, shall be forproperties agreed upon between the manufacturer and thepurchaser.10. Test Specimen Preparation10.1 Finished SPF test panels shall be made by sprayapplication consistent with
18、the manufacturers recommenda-tions including temperatures of the liquid components, ambienttemperature, temperature and type of substrate, type andoperation settings of spray equipment, and thickness of SPFper pass. Unless otherwise specified and reported, the ambientand substrate temperature shall
19、be 24 6 3C 75 6 5F andrelative humidity must not exceed 80 %. The test panels shallbe of a sufficient quantity and size to satisfy test requirements.10.2 The test panels shall be allowed to cure for at least 72hat246 3C 75 6 5F and 50 6 5 % relative humiditybefore cutting or testing for additional p
20、hysical properties.10.3 Core specimens, when required, shall be obtained byremoving both the external skin and the boundary skin found atthe substrate/SPF interface. A trim cut on each face to a depthof3to6mm18 to14 in. is sufficient10.4 Sample preparation method for determining responseto thermal a
21、nd humid aging in accordance with Test MethodD2126. The samples are spray applied to exterior CDX grade19 mm 34 in. plywood (unfinished on both sides), which is610 by 610 mm 2 by 2 ft. The maximum height of the appliedfoam shall be 50 mm 2 in. above the substrate with aminimum of two passes and a ma
22、ximum of three. A sample of305 by 305 mm 12 by 12 in. is cut from the center of theplywood foam sample as the test specimen. The specimen andplywood will be cut in such a manner that it will have a knitline. The cut foam height will be 25.4 mm 1 in. from theplywood surface. The test specimen will ha
23、ve smooth edgesfree of cracks. All faces shall be flat. Dust shall be blown offthe sample. Two specimens shall be used for test exposure pertest. In addition, one sample of the plywood will also be cut tothese dimensions as a control.11. Test Methods11.1 Determine thermal resistance in accordance wi
24、th TestMethod C177, Test Method C1363, or Test Method C518 at amean temperature of 24 6 1C 75 6 2F and 22C 40Fminimum temperature gradient. These core specimens shall beconditioned 24 6 1C 75 6 2F and 50 6 5 % relativehumidity for 180 days. Size of specimens shall be 305 by 305by 2.5 mm 12 by 12 by
25、1 in.11.2 Determine compressive strength in accordance withTest Method C165, Procedure A, at a crosshead speed of 2.54mm/min 0.1 in./min per 25.4 mm 1 in. of thickness, at yieldor 10 % deformation, whichever comes first, or in accordancewith Test Method D1621, Procedure A. The loading force shallbe
26、applied parallel to the normal thickness dimension of theSPF.11.3 Determine water absorption in accordance with TestMethod D2842.11.4 Determine tensile strength in accordance with TestMethod D1623.11.5 Determine the response to thermal and humid aging inaccordance with Test Method D2126. Expose 305
27、by 305 by 25mm 12 by 12 by 1 in. specimens adhered to 19 mm 34 in.exterior grade plywood to 70 6 2C 158 6 4F and 97 6 3%relative humidity for 168 6 2 h. Measure after 24 612 h and168 6 2h.11.6 Determine core density in accordance with TestMethod D1622.11.7 Determine water vapor permeability in accor
28、dancewith Test Method E96/E96M, Procedure B. The test specimenshall be flat and without external skin. The number of knit linesshall be reported.11.8 Determine the closed cell content in accordance withTest Method D6226.12. Rejection, Rehearing, and Resubmittal12.1 Finished SPF test panels that fail
29、 to conform to therequirements of this specification are grounds for rejection ofthe liquid components. Rejection should be reported to themanufacturer promptly and in writing. In case of disagreementTABLE 1 Physical PropertyProperty Units RequirementsThermal resistance of 25 mm 1.0 in. thickness ag
30、ed atmean temperature 24C 75F and 180 daysKm2/W Fft2h/Btu 0.98 5.6, minCompressive strength, at yield or 10 % deformation KPa psi 276 40, minDensity Kg/m3lb/ft3 40 2.5, minWater absorption volume % 5, maxTensile strength KPa psi 276 40, minDimensional stability, 70C, 97 % RH, 2 weeks linear change %
31、 +6, maxClosed cell content % 90, minWater vapor permeability ng/Pasperm-in. 4.47 3.02, maxD7425/D7425M 112with the results of any test, the manufacturer may make a claimfor a rehearing. In case of rejection the manufacturer shall havethe right to reinspect the rejected shipment and resubmit the lot
32、after removal of that portion not conforming to requirements.13. Packaging and Package Marking13.1 Unless otherwise specified or agreed upon between themanufacturer and the purchaser, the liquid components shall bepackaged in the manufacturers standard commercial contain-ers.13.2 Each package shall
33、be blanketed with dry air ornitrogen and tightly sealed.13.3 Each container shall be clearly identified as eitherpolyisocyanate (“A” component) or resin (“B” component).13.4 Each container shall also be marked with the followinginformation:13.4.1 Name of the manufacturer.13.4.2 Manufacturers product
34、 designation.13.4.3 Manufacturers lot or date of manufacturer or both.13.4.4 Net weight of the contents and gross weight of thecontainer and contents.13.4.5 Instructions for safe handling and recommendedstorage temperatures.13.4.6 Mixing instructions.13.4.7 Listing agency label if applicable.14. Key
35、words14.1 insulation; roofing; SPFspray polyurethane foamAPPENDIX(Nonmandatory Information)X1. General InformationX1.1 The properties of spray-applied polyurethane foam(SPF) may vary depending on such factors as the thickness ofthe SPF, the temperature and type of substrate, the ambienttemperature a
36、nd humidity, the number of spray passes, and theoutput of the equipment. The properties may also vary depend-ing on different manufacturers liquid components.X1.2 SPF generally exhibits its highest thermal resistanceat the time of manufacture. The thermal resistance may besignificantly influenced by
37、 installation and service-relatedvariables such as age, foam thickness, type of coating, envi-ronmental conditions and mechanical abuse. These variablesmay cause the thermal resistance to be reduced from measuredinitial values.X1.3 Rigid-cellular polyurethane thermal insulation iscombustible to vary
38、ing degrees when exposed to an ignitionsource or high temperatures, or both.X1.4 Consult local building and fire code regulations,insurance requirements, and the manufacturers specificationsand application instructions for each specific installation.Detailed information concerning the application of
39、 SPF andfire safety can be obtained from the SPFA (Spray PolyurethaneFoam Alliance)ASTM 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 advised that determination of the
40、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 reapproved or withdrawn. Your
41、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 you feel that your comments h
42、ave 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. Individual reprints (single or multip
43、le 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 ASTM website (www.astm.org/COPYRIGHT/).D7425/D7425M 113
