1、Designation: F942 18Standard Guide forSelection of Test Methods for Interlayer Materials forAerospace Transparent Enclosures1This standard is issued under the fixed designation F942; the number immediately following the designation indicates the year of originaladoption or, in the case of revision,
2、the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide summarizes the standard test methods avail-able for determining physical and mechanical characteris
3、tics ofinterlayer materials used in multi-ply aerospace transparentenclosures.1.2 Interlayer materials are used to laminate glass-to-glass,glass-to-plastic, and plastic-to-plastic. Interlayer materials arebasically transparent adhesives with high-quality optical prop-erties. They can also serve as a
4、n energy absorbing medium, afail-safe membrane to contain cockpit pressure and to prevententry of impact debris; a strain insulator to accommodatedifferent thermal expansion rates of members being laminatedand as an adherent to prevent spalling of inner surface plymaterial fragments. The relative im
5、portance of an interlayercharacteristic will be a function of the prime use it serves in itsparticular application.1.3 This guide, as a summary of various methods in Section2, is intended to facilitate the selection of tests that can beapplied to interlayer materials.1.4 The test methods listed are
6、for use in determining basicdesign characteristics and in assuring lot-to-lot uniformity ofthe materials being tested except as noted in 3.3.1.5 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
7、to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Pri
8、nciples for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Propertie
9、s by Means ofthe Guarded-Hot-Plate ApparatusD149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD542 Test Method for Index of Refrac
10、tion of TransparentOrganic PlasticsD570 Test Method for Water Absorption of PlasticsD696 Test Method for Coefficient of Linear Thermal Expan-sion of Plastics Between 30C and 30C with a VitreousSilica DilatometerD792 Test Methods for Density and Specific Gravity (Rela-tive Density) of Plastics by Dis
11、placementD1003 Test Method for Haze and Luminous Transmittanceof Transparent PlasticsD1004 Test Method for Tear Resistance (Graves Tear) ofPlastic Film and SheetingD1045 Test Methods for Sampling and Testing PlasticizersUsed in PlasticsD1204 Test Method for Linear Dimensional Changes ofNonrigid Ther
12、moplastic Sheeting or Film at ElevatedTemperatureD1824 Test Method for Apparent Viscosity of Plastisols andOrganosols at Low Shear RatesD2240 Test Method for Rubber PropertyDurometer Hard-nessD2766 Test Method for Specific Heat of Liquids and Solids(Withdrawn 2018)3D2857 Practice for Dilute Solution
13、 Viscosity of PolymersD3167 Test Method for Floating Roller Peel Resistance ofAdhesives1This guide is under the jurisdiction ofASTM Committee F07 on Aerospace andAircraft and is the direct responsibility of Subcommittee F07.08 on TransparentEnclosures and Materials.Current edition approved June 1, 2
14、018. Published June 2018. Originallyapproved in 1985. Last previous edition approved in 2013 as F942 08(2013). DOI:10.1520/F0942-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume inform
15、ation, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was
16、developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1D3418 Test Met
17、hod for Transition Temperatures and En-thalpies of Fusion and Crystallization of Polymers byDifferential Scanning CalorimetryD3465 Test Method for Purity of Monomeric Plasticizers byGas ChromatographyD3835 Test Method for Determination of Properties ofPolymeric Materials by Means of a Capillary Rheo
18、meterE313 Practice for Calculating Yellowness and WhitenessIndices from Instrumentally Measured Color CoordinatesE1530 Test Method for Evaluating the Resistance to Ther-mal Transmission of Materials by the Guarded Heat FlowMeter TechniqueE1640 Test Method for Assignment of the Glass TransitionTemper
19、ature By Dynamic Mechanical AnalysisF520 Test Method for Environmental Resistance of Aero-space Transparencies to Artificially Induced ExposuresF521 Test Methods for Bond Integrity of Transparent Lami-natesF1164 Test Method for Evaluation of Transparent PlasticsExposed to Accelerated Weathering Comb
20、ined with Bi-axial StressF1316 Test Method for Measuring the Transmissivity ofTransparent PartsF1362 Test Method for Shear Strength and Shear Modulusof Aerospace Glazing Interlayer Materials3. Significance and Use3.1 This guide is intended for use by material suppliers,aircraft transparent enclosure
21、 fabricators, airframemanufacturers, government agencies, and others that maybecome involved in the testing of transparent interlayer mate-rials. These test methods provide data on both individualinterlayer materials and material combinations commonly usedin the fabrication of aerospace transparent
22、enclosures andprovide a means of evaluating the performance of one inter-layer material against another.3.2 Primary characteristics and their long-term stability arecritical to the performance of an interlayer material. Basic testsdefine the as-manufactured material characteristics of theinterlayer
23、material. Ageing procedures provide for representa-tive exposure to environments that induce changes in materialcharacteristics. Tests performed before and after ageing expo-sure provide a means of estimating the potential useablelife-span of an interlayer material or to compare the durabilityof one
24、 interlayer material with another.3.3 When employing these test methods for the comparisonof interlayer materials after exposure to selected environmentalconditions, the user shall be aware that many factors influenc-ing degradation due to weathering vary from one location andexposure period to anot
25、her location and exposure period. Fordirect weathering comparisons, the interlayer materials to becompared shall be subjected to the exposure and have the testsperformed at the same time. It is emphasized that the testvalues obtained under these simultaneously applied conditionsare for comparative u
26、se and their use as design characteristicsshall be made with caution.3.4 The test methods listed include those considered criticalto the performance of aircraft transparent enclosures. The useris advised to use the latest revision of any test method.4. Keywords4.1 aerospace; interlayer materials; la
27、minates; transparentenclosuresASTM 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 validity of any such patent rights, and the riskof in
28、fringement 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 comments are invited either for revision of this stan
29、dard 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 have not received a fair hearing you shouldmake your v
30、iews 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 multiple copies) of this standard may be obtained by contac
31、ting 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 182
