1、Designation: D7425/D7425M 11D7425/D7425M 13Standard 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 revi
2、sion, the year 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 properties of spray polyurethane foam (SPF) for use
3、 in SPF roofingapplications.1.2 This specification does not provide guidance for application.1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used inde
4、pendently of the other. Combining values from thetwo systems may result in non-conformance with the standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety
5、 and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C165 Test Method for Measuring Compressive Properties of Thermal InsulationsC168 Terminology Relating to Thermal InsulationC177 Test Method for Steady-State Heat Flu
6、x Measurements and Thermal Transmission Properties by Means of theGuarded-Hot-Plate ApparatusC518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter ApparatusC1363 Test Method for Thermal Performance of Building Materials and EnvelopeAssemblies by Means of a
7、 Hot BoxApparatusD1079 Terminology Relating to Roofing and WaterproofingD1621 Test Method for Compressive Properties of Rigid Cellular PlasticsD1622 Test Method for Apparent Density of Rigid Cellular PlasticsD1623 Test Method for Tensile and Tensile Adhesion Properties of Rigid Cellular PlasticsD212
8、6 Test Method for Response of Rigid Cellular Plastics to Thermal and Humid AgingD2842 Test Method for Water Absorption of Rigid Cellular PlasticsD6226 Test Method for Open Cell Content of Rigid Cellular PlasticsE96/E96M Test Methods for Water Vapor Transmission of Materials3. Terminology3.1 Definiti
9、onsFor definitions of terms used in this specification, refer to Terminologies D1079 and C168.3.1.1 knit linealso called lift line. They are interchangeable terms describing the adhesion plane where one pass is sprayedover another.4. Significance and Use4.1 This specification covers spray polyuretha
10、ne foam (SPF) that is used as part of a SPF roofing system.1 This specification is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.06 on SprayPolyurethane Foam Roof Systems.Current edition approved Jan. 1, 2011Aug. 1, 201
11、3. Published February 2011August 2013. Originally approved in 2008. Last previous edition approved in 20082011 asD7425 08.D7425 11. DOI: 10.1520/D7425_D7425M-11.10.1520/D7425_D7425M-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm
12、.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
13、it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr
14、 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15. Classification5.1 This specification covers SPF currently commercially available as described by the physical property requirements in Table1.5.2 SPF shall be manufactured with HFC, hydrocarbon or/and water blowing agents
15、. It is classified into two types as follows:5.2.1 Type IThermal resistance, R value, is equal to or greater 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 0.72 and 0.98 Km2/W 4.1 and 5.6Fft2h/Btu per 25.4 mm 1 in.thickness.6. Ordering In
16、formation6.1 Orders for materials purchased under this specification shall include the following:6.1.1 ASTM designation, year of issue, and title.6.1.2 Type (see Type.5.2).6.1.3 Sampling, if different (see Section 9).6.1.4 If packaging is other than specified (see 13.1).6.1.5 If marking is other tha
17、n specified (see 13.4).7. Materials and Manufacture7.1 SPF is produced by the catalyzed polymerization of polyisocyanates in the presence of polyhydroxyl compounds, with theaddition of other compounds such as stabilizers and blowing agents.7.2 The materials shall be capable of being mixed and applie
18、d using commercially available polyurethane spray equipment.8. Physical Requirements8.1 SPF used in roofing applications shall meet the minimum physical property values as shown in Table 1.8.2 Other physical properties may be required, as agreed upon by the purchaser and the manufacturer.9. Sampling
19、9.1 Sampling for inspection tests, if required, shall be for properties agreed upon between the manufacturer and the purchaser.10. Test Specimen Preparation10.1 Finished SPF test panels shall be made by spray application consistent with the manufacturers recommendations includingtemperatures of the
20、liquid components, ambient temperature, temperature and type of substrate, type and operation settings of sprayequipment, and thickness of SPF per pass. Unless otherwise specified and reported, the ambient and substrate temperature shallbe 24 6 3C 75 6 5F and relative humidity must not exceed 80 %.
21、The test panels shall be of a sufficient quantity and size tosatisfy test requirements.10.2 The test panels shall be allowed to cure for at least 72 h at 24 6 3C 75 6 5F and 50 6 5 % relative humidity beforecutting or testing for additional physical properties.10.3 Core specimens, when required, sha
22、ll be obtained by removing both the external skin and the boundary skin found at thesubstrate/SPF interface. A trim cut on each face to a depth of 3 to 6 mm 18 to 14 in. is sufficientTABLE 1 Physical PropertyCOLSPEC/colnum=“3“ colname=“COLSPEC1“Property Units RequirementsProperty Units RequirementsT
23、hermal resistance of 25 mm 1.0 in. thickness agedatmean temperature 24C 75F and 180 daysKm2/W Fft2h/Btu 0.98 5.6, minThermal resistance of 25 mm 1.0 in. thickness agedat mean temperature 24C 75F for 180 days or atmean temperature 60C 140F for 90 days.Km2/W Fft 2h/Btu 0.98 5.6, minCompressive strengt
24、h, at yield or 10 % deformation KPa psi 276 40, minDensity Kg/m3 lb/ft3 40 2.5, minWater absorption volume % 5, maxTensile strength KPa psi 276 40, minDimensional stability, 70C, 97 % RH, 2 weeks linear change % +6, maxClosed cell content % 90, minWater vapor permeability ng/Pasperm-in. 4.47 3.02, m
25、axD7425/D7425M 13210.4 Sample preparation method for determining response to thermal and humid aging in accordance with Test Method D2126.The samples are spray applied to exterior CDX grade 19 mm 34 in. plywood (unfinished on both sides), which is 610 by 610mm 2 by 2 ft. The maximum height of the ap
26、plied foam shall be 50 mm 2 in. above the substrate with a minimum of two passesand a maximum of three. A sample of 305 by 305 mm 12 by 12 in. is cut from the center of the plywood foam sample as thetest specimen. The specimen and plywood will be cut in such a manner that it will have a knit line. T
27、he cut foam height will be25.4 mm 1 in. from the plywood surface. The test specimen will have smooth edges free of cracks. All faces shall be flat. Dustshall be blown off the sample. Two specimens shall be used for test exposure per test. In addition, one sample of the plywood willalso be cut to the
28、se dimensions as a control.11. Test Methods11.1 Determine thermal resistance in accordance with Test Method C177, Test Method C1363, or Test Method C518 at a meantemperature of 24 6 1C 75 6 2F and 22C 40F minimum temperature gradient. These core specimens shall be conditioned24 6 1C 75 6 2F and 50 6
29、 5 % relative humidity for 180 days. Size of specimens shall be 305 by 305 by 2.5 mm 12 by 12by 1 in.11.2 Determine compressive strength in accordance with Test Method C165, ProcedureA, at a crosshead speed of 2.54 mm/min0.1 in./min per 25.4 mm 1 in. of thickness, at yield or 10 % deformation, which
30、ever comes first, or in accordance with TestMethod D1621, Procedure A. The loading force shall be applied parallel to the normal thickness dimension of the SPF.11.3 Determine water absorption in accordance with Test Method D2842.11.4 Determine tensile strength in accordance with Test Method D1623.11
31、.5 Determine the response to thermal and humid aging in accordance with Test Method D2126. Expose 305 by 305 by 25 mm12 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 % relativehumidity for 168 6 2 h. Measure after 24 6 12 h and 168 6 2 h.11.6
32、Determine core density in accordance with Test Method D1622.11.7 Determine water vapor permeability in accordance with Test Method E96/E96M, Procedure B. The test specimen shall beflat and without external skin. The number of knit lines shall be reported.11.8 Determine the closed cell content in acc
33、ordance with Test Method D6226.12. Rejection, Rehearing, and Resubmittal12.1 Finished SPF test panels that fail to conform to the requirements of this specification are grounds for rejection of the liquidcomponents. Rejection should be reported to the manufacturer promptly and in writing. In case of
34、 disagreement with the resultsof any test, the manufacturer may make a claim for a rehearing. In case of rejection the manufacturer shall have the right toreinspect the rejected shipment and resubmit the lot after removal of that portion not conforming to requirements.13. Packaging and Package Marki
35、ng13.1 Unless otherwise specified or agreed upon between the manufacturer and the purchaser, the liquid components shall bepackaged in the manufacturers standard commercial containers.13.2 Each package shall be blanketed with dry air or nitrogen and tightly sealed.13.3 Each container shall be clearl
36、y identified as either polyisocyanate (“A” component) or resin (“B” component).13.4 Each container shall also be marked with the following information: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 o
37、f the contents and gross weight of the container and contents.13.4.5 Instructions for safe handling and recommended storage temperatures.13.4.6 Mixing instructions.13.4.7 Listing agency label if applicable.14. Keywords14.1 insulation; roofing; SPFspray polyurethane foamNOTE 1Thermal Resistance of SP
38、F for roofing application varies significantly depending on formulations, but shall have a minimum value of 0.98Km2/W 5.6Fft2/Btu per 25.4 mm 1 in.D7425/D7425M 133APPENDIX(Nonmandatory Information)X1. General InformationX1.1 The properties of spray-applied polyurethane foam (SPF) may vary depending
39、on such factors as the thickness of the SPF,the temperature and type of substrate, the ambient temperature and humidity, the number of spray passes, and the output of theequipment. The properties may also vary depending on different manufacturers liquid components.X1.2 SPF generally exhibits its hig
40、hest thermal resistance at the time of manufacture. The thermal resistance may be significantlyinfluenced by installation and service-related variables such as age, foam thickness, type of coating, environmental conditions andmechanical abuse. These variables may cause the thermal resistance to be r
41、educed from measured initial values.X1.3 Rigid-cellular polyurethane thermal insulation is combustible to varying degrees when exposed to an ignition source or hightemperatures, or both.X1.4 Consult local building and fire code regulations, insurance requirements, and the manufacturers specification
42、s andapplication instructions for each specific installation. Detailed information concerning the application of SPF and fire safety canbe obtained from the SPFA (Spray Polyurethane Foam Alliance)ASTM International takes no position respecting the validity of any patent rights asserted in connection
43、 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 revision at any time by the responsible t
44、echnical 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. Your comments will receive careful consider
45、ation 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 copyrighted by ASTM International, 100 Barr
46、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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D7425/D7425M 134
