1、Designation: D 7425 08Standard Specification forSpray Polyurethane Foam Used for Roofing Applications1This standard is issued under the fixed designation D 7425; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revi
2、sion. 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 types and physical proper-ties of spray polyurethane foam (SPF) for use in SPF roofingapplicatio
3、ns.1.2 This specification does not provide guidance for appli-cation.1.3 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use.
4、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.2. Referenced Documents2.1 ASTM Standards:2C 165 Test Method for Measuring Compressive Propertiesof Thermal InsulationsC
5、168 Terminology Relating to Thermal InsulationC 177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarded-Hot-Plate ApparatusC 518 Test Method for Steady-State Thermal TransmissionProperties by Means of the Heat Flow Meter ApparatusC 1363 Tes
6、t Method for Thermal Performance of BuildingMaterials and Envelope Assemblies by Means of a HotBox ApparatusD 1079 Terminology Relating to Roofing and Waterproof-ingD 1621 Test Method for Compressive Properties Of RigidCellular PlasticsD 1622 Test Method for Apparent Density of Rigid CellularPlastic
7、sD 1623 Test Method for Tensile and Tensile AdhesionProperties of Rigid Cellular PlasticsD 2126 Test Method for Response of Rigid Cellular Plasticsto Thermal and Humid AgingD 2842 Test Method for Water Absorption of Rigid CellularPlasticsD 6226 Test Method for Open Cell Content of Rigid Cel-lular Pl
8、asticsE 96/E 96M Test Methods for Water Vapor Transmission ofMaterials3. Terminology3.1 DefinitionsFor definitions of terms used in this speci-fication, refer to Terminologies D 1079 and C 168.3.1.1 knit linealso called lift line. They are interchange-able terms describing the adhesion plane where o
9、ne pass issprayed over another.4. Significance and Use4.1 This specification covers spray polyurethane foam(SPF) that 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
10、1.5.2 SPF shall be manufactured with HFC, hydrocarbonor/and water blowing agents. It is classified into two types asfollows: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
11、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 purchased 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).6.1.
12、4 If packaging is other than specified (see 13.1).1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.06on Spray Polyurethane Foam Roof Systems.Current edition approved April 1, 2008. Published May 2008.
13、2For referenced ASTM standards, 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box
14、C700, West Conshohocken, PA 19428-2959, United States.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 stabilize
15、rs andblowing 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 m
16、ay be required, 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 con
17、sistent with 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 tempe
18、rature shall 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
19、 for additional physical 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 depthof3to6mm(18 to14 in.) is sufficient10.4 Sample preparation method for determining r
20、esponseto thermal and humid aging in accordance with Test MethodD 2126. 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 amini
21、mum of two passes and a maximum 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 surf
22、ace. The test specimen will have 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 therm
23、al resistance in accordance with TestMethod C 177, Test Method C 1363, or Test Method C 518 ata mean temperature of 24 6 1C (75 6 2F) and 22C (40F)minimum temperature gradient. These core specimens shall beconditioned 24 6 1C (75 6 2F) and 50 6 5 % relativehumidity for 180 days. Size of specimens sh
24、all be 305 by 305by 2.5 mm (12 by 12 by 1 in.).11.2 Determine compressive strength in accordance withTest Method C 165, 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
25、 D 1621, ProcedureA. The loading force shallbe applied parallel to the normal thickness dimension of theSPF.11.3 Determine water absorption in accordance with TestMethod D 2842.11.4 Determine tensile strength in accordance with TestMethod D 1623.11.5 Determine the response to thermal and humid aging
26、 inaccordance with Test Method D 2126. Expose 305 by 305 by25 mm (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 TestMetho
27、d D 1622.11.7 Determine water vapor permeability in accordancewith Test Method E 96/E 96M, 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 D 6226.TABLE 1 Physical Pro
28、pertiesRequirementsProperty Type I Type IIThermal resistance of 25 mm (1.0 in.) thickness, Km2/W(Fft2h/Btu) at mean temperature 24C (75F), 180 days0.98 (5.6) min 0.72 to 0.98 (4.1 to 5.6)Compressive strength, min, KPa (psi) at yield or 10 % deformation 276 (40) 276 (40)Density, min, Kg/m3(lb/ft3) 40
29、 (2.5) 40 (2.5)Water absorption, max, volume % 5 5Tensile strength, min, KPa (psi) 276 (40) 276 (40)Dimensional stability, max, linear change %, 70C,97 % RH, 2 weeks+6 +6Closed cell content, min, % 90 50Water vapor permeability, max, ng/Pas(perm-in.) 4.47 (3.02) 4.47 (3.02)D742508212. Rejection, Reh
30、earing, and Resubmittal12.1 Finished SPF test panels that fail 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 disagreementwith the results of any test, the manu
31、facturer may make a claimfor a rehearing. In case of rejection the manufacturer shall havethe right to reinspect the rejected shipment and resubmit the lotafter removal of that portion not conforming to requirements.13. Packaging and Package Marking13.1 Unless otherwise specified or agreed upon betw
32、een themanufacturer and the purchaser, the liquid components shall bepackaged in the manufacturers standard commercial contain-ers.13.2 Each package shall be blanketed with dry air ornitrogen and tightly sealed.13.3 Each container shall be clearly identified as eitherpolyisocyanate (“A” component) o
33、r 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 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 cont
34、ents.13.4.5 Instructions for safe handling and recommendedstorage temperatures.13.4.6 Mixing instructions.13.4.7 Listing agency label if applicable.14. Keywords14.1 insulation; roofing; SPFspray polyurethane foamAPPENDIX(Nonmandatory Information)X1. General InformationX1.1 The properties of spray-ap
35、plied polyurethane foam(SPF) may vary depending on such factors as the thickness ofthe SPF, the temperature and type of substrate, the ambienttemperature and humidity, the number of spray passes, and theoutput of the equipment. The properties may also vary depend-ing on different manufacturers liqui
36、d components.X1.2 SPF generally exhibits its highest thermal resistanceat the time of manufacture. The thermal resistance may besignificantly influenced by installation and service-relatedvariables such as age, foam thickness, type of coating, envi-ronmental conditions and mechanical abuse. These va
37、riablesmay cause the thermal resistance to be reduced from measuredinitial values.X1.3 Rigid-cellular polyurethane thermal insulation iscombustible to varying degrees when exposed to an ignitionsource or high temperatures, or both.X1.4 Consult local building and fire code regulations,insurance requi
38、rements, and the manufacturers specificationsand application instructions for each specific installation.Detailed information concerning the application of SPF andfire safety can be obtained from the SPFA (Spray PolyurethaneFoam Alliance)ASTM International takes no position respecting the validity o
39、f any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised 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
40、 revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.
41、Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If 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 c
42、opyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual 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).D7425083
