1、Designation: F 942 02 (Reapproved 2008)Standard Guide forSelection of Test Methods for Interlayer Materials forAerospace Transparent Enclosures1This standard is issued under the fixed designation F 942; the number immediately following the designation indicates the year oforiginal adoption or, in th
2、e case of revision, the year of last revision. 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 guide summarizes the standard test methods avail-able for determining physical a
3、nd mechanical characteristics 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.
4、 They can also serve as an 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 f
5、ragments. The relative importance 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
6、 test methods listed are 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 t
7、he user of this standard to establish appro-priate safety and heal practices and determine the applicabilityof regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe
8、Guarded-Hot-Plate ApparatusD 149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD 412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTensionD 542 Test Method for Index of Refraction of Transp
9、arentOrganic PlasticsD 570 Test Method for Water Absorption of PlasticsD 696 Test Method for Coefficient of Linear Thermal Ex-pansion of Plastics Between 30C and 30C with aVitreous Silica DilatometerD 792 Test Methods for Density and Specific Gravity (Rela-tive Density) of Plastics by DisplacementD
10、1003 Test Method for Haze and Luminous Transmittanceof Transparent PlasticsD 1004 Test Method for Tear Resistance (Graves Tear) ofPlastic Film and SheetingD 1045 Test Methods for Sampling and Testing PlasticizersUsed in PlasticsD 1204 Test Method for Linear Dimensional Changes ofNonrigid Thermoplast
11、ic Sheeting or Film at ElevatedTemperatureD 1824 Test Method for Apparent Viscosity of Plastisolsand Organosols at Low Shear RatesD 2240 Test Method for Rubber PropertyDurometerHardnessD 2766 Test Method for Specific Heat of Liquids and SolidsD 2857 Practice for Dilute Solution Viscosity of Polymers
12、D 3167 Test Method for Floating Roller Peel Resistance ofAdhesivesD 3465 Test Method for Purity of Monomeric Plasticizersby Gas ChromatographyD 3835 Test Method for Determination of Properties ofPolymeric Materials by Means of a Capillary RheometerE 1640 Test Method for Assignment of the Glass Trans
13、itionTemperature By Dynamic Mechanical AnalysisF 520 Test Method for Environmental Resistance of Aero-space TransparenciesF 521 Test Methods for Bond Integrity of TransparentLaminates1This guide is under the jurisdiction ofASTM Committee F07 onAerospace andAircraft and is the direct responsibility o
14、f Subcommittee F07.08 on TransparentEnclosures and Materials.Current edition approved April 1, 2008. Published June 2002. Originallypublished as F 942 85. Last previous edition F 942 93.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceas
15、tm.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.F 1164 Test Method for Evaluation of Transparent PlasticsExp
16、osed to Accelerated Weathering Combined with Bi-axial StressF 1316 Test Method for Measuring the Transmissivity ofTransparent PartsF 1362 Test Method for Shear Strength and Shear Modulusof Aerospace Glazing Interlayer Materials3. Significance and Use3.1 This guide is intended for use by material sup
17、pliers,aircraft transparent enclosure fabricators, airframe manufactur-ers, government agencies, and others that may become in-volved in the testing of transparent interlayer materials. Thesetest methods provide data on both individual interlayer mate-rials and material combinations commonly used in
18、 the fabri-cation of aerospace transparent enclosures and provide a meansof evaluating the performance of one interlayer materialagainst another.3.2 Primary characteristics and their long-term stability arecritical to the performance of an interlayer material. Basic testsdefine the as-manufactured m
19、aterial characteristics of theinterlayer material. Ageing procedures provide for representa-tive exposure to environments that may induce changes inmaterial characteristics. Tests performed before and afterageing exposure provide a means of estimating the potentialuseable life-span of an interlayer
20、material or to compare thedurability of one 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 f
21、rom one location andexposure period to another 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 simultaneou
22、sly applied conditionsare for comparative use 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. Keyw
23、ords4.1 aerospace; interlayer materials; laminates; 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 o
24、f 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 comments a
25、re 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 have not re
26、ceived 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 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).F 942 02 (2008)2
