1、Designation: F 942 02Standard 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 the case of revision
2、, 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 and mechanical char
3、acteristics 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 ser
4、ve 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 fragments. The rela
5、tive 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 test methods list
6、ed 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 the user of this st
7、andard to establish appro-priate safety and heal practices and determine the applicabilityof regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:C 177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarded Hot-Plate A
8、pparatus2D 149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power Frequencies3D 412 Test Methods for Vulcanized Rubber and Thermo-plastic Rubbers and Thermoplastic Elastomers-Tension4D 542 Test Methods for Index of Refracti
9、on of TransparentOrganic Plastics5D 570 Test Method for Water Absorption of Plastics5D 696 Test Method for Coefficient of Linear Thermal Ex-pansion of Plastics Between 30C and 30C With aVitreous Silica Dilatometer5D 792 Test Methods for Specific Gravity (Relative Density)and Density of Plastics by D
10、isplacement5D 1003 Test Method for Haze and Luminous Transmittanceof Transparent Plastics5D 1004 Test Method for Initial Tear Resistance of PlasticFilm and Sheeting5D 1045 Methods of Sampling and Testing Plasticizers Usedin Plastics5D 1204 Test Method for Linear Dimensional Changes ofNonrigid Thermo
11、plastic Sheeting or Film at ElevatedTemperature5D 1824 Test Method for Apparent Viscosity of Plastisolsand Organosols at Low Shear Rates by Brookfield Vis-cometer5D 2240 Test Method for Rubber PropertyDurometerHardness4D 2766 Test Method for Specific Heat of Liquids andSolids6D 2857 Test Method for
12、Dilute Solution Viscosity of Poly-mers7D 3167 Test Method for Floating Roller Peel Resistance ofAdhesives8D 3465 Test Method for Purity of Monomeric Plasticizersby Gas Chromatography7D 3835 Test Method for Determination of Properties ofPolymeric Materials by Means of a Capillary Rheometer7E 1640 Tes
13、t Method for Assignment of the Glass TransitionTemperature by Dynamic Mechanical Analysis91This guide is under the jurisdiction of ASTM Committee F07 on Aerospace andAircraft and is the direct responsibility of Subcommittee F07.08 on TransparentEnclosures and Materials.Current edition approved May 1
14、0, 2002. Published June 2002. Originallypublished as F 942 85. Last previous edition F 942 93.2Annual Book of ASTM Standards, Vol 04.06.3Annual Book of ASTM Standards, Vol 10.01.4Annual Book of ASTM Standards, Vol 09.01.5Annual Book of ASTM Standards, Vol 08.01.6Annual Book of ASTM Standards, Vol 05
15、.02.7Annual Book of ASTM Standards, Vol 08.02.8Annual Book of ASTM Standards, Vol 15.06.9Annual Book of ASTM Standards, Vol 14.02.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.F 520 Test Method for Environmental Resistance of Aero-
16、space Transparencies10F 521 Test Methods for Bond Integrity of TransparentLaminates10F 1164 Test Method for Evaluation of Transparent PlasticsExposed to Accelerated Weathering Combined with Bi-axial Stress10F 1316 Test Method for Measuring the Transmissivity ofTransparent Parts10F 1362 Test Method f
17、or Shear Strength and Shear Modulusof Aerospace Glazing Interlayer Materials103. Significance and Use3.1 This guide is intended for use by material suppliers,aircraft transparent enclosure fabricators, airframe manufactur-ers, government agencies, and others that may become in-volved in the testing
18、of transparent interlayer materials. Thesetest methods provide data on both individual interlayer mate-rials and material combinations commonly used in the fabri-cation of aerospace transparent enclosures and provide a meansof evaluating the performance of one interlayer materialagainst another.3.2
19、Primary characteristics and their long-term stability arecritical to the performance of an interlayer material. Basic testsdefine the as-manufactured material characteristics of theinterlayer material. Ageing procedures provide for representa-tive exposure to environments that may induce changes inm
20、aterial characteristics. Tests performed before and afterageing exposure provide a means of estimating the potentialuseable life-span of an interlayer material or to compare thedurability of one interlayer material with another.3.3 When employing these test methods for the comparisonof interlayer ma
21、terials 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 another location and exposure period. Fordirect weathering comparisons, the interlayer materials to becompared
22、 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 use and their use as design characteristicsshall be made with caution.3.4 The test methods listed include t
23、hose 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; laminates; transparentenclosuresASTM International takes no position respecting the validity of any patent r
24、ights 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 revision at a
25、ny 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. Your comments
26、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 copyrighted by
27、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).10Annual Book of ASTM Standards, Vol 15.03.F 9422
