ASTM F790-08

Standard Guide for Testing Materials for Aerospace Plastic Transparent Enclosures

SIGNIFICANCE AND USE
This guide is intended for use by material suppliers, aircraft transparent enclosure fabricators, air-frame manufacturers, government agencies, and others that may become involved in the testing of transparency components. These test methods provide data on both individual materials and material combinations commonly utilized in the fabrications of aerospace transparent enclosures comprised of monolithic plastic, coated monolithic plastic or laminated constructions containing plastics.
Primary properties and their long term stability are critical to the performance of aerospace transparent enclosures. Property measurement tests define as-manufactured material properties of these materials. Aging procedures provide for exposure of parts or representative sections to environments that may induce changes in material properties as determined in property measurement tests. Property measurement tests performed before and after aging exposure provide a means of estimating the potential usable life span of a transparency or to compare the durability of one material with another.
When employing these test methods for comparison of materials for weathering effects the user should be aware that the many factors influencing degradation due to weathering vary from one location to another. For direct weathering comparisons, all material(s) should undergo exposure conditions and property measurements testing at the same time.
The test methods listed include those considered critical to the performance of aircraft transparent enclosures. Other test methods to evaluate materials may also be performed. Additional test methods are in preparation and will be incorporated. The user is advised to employ the latest revision of any test method.
The dominant component of all transparent enclosures is one, or more, rigid transparent sheet(s). The sheet(s) must permit the necessary visibility while providing structural integrity and protecting the aircraft interior from external envir...
SCOPE
1.1 This guide is intended to summarize the standard test methods available on individual and composite materials utilized in fabrication of aerospace plastic transparent enclosures. As such, it is intended to specifically include transparent thermoplastics, transparent elastomers, and reinforced plastics, whether thermoplastic or thermosetting.
1.2 This guide is intended as an aid in the search for test methods pertinent to Aerospace Plastic Transparent Enclosures. It should be understood that all methods listed may not apply to all enclosures.
1.3 The standards included refer to the properties or aspects listed in Table 1. The properties or aspects are listed in alphabetical order and the descriptions used are intended to facilitate the search.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Mar-2008
• ICS: 49.045 - Structure and structure elements
• Technical Committee: F07 - Aerospace and Aircraft
• Drafting Committee: F07.08 - Transparent Enclosures and Materials

Relations

• Replaces: ASTM F790-02 - Standard Guide for Testing Materials for Aerospace Plastic Transparent Enclosures
• Effective Date: 01-Apr-2008
• Replaced By: ASTM F790-08(2013) - Standard Guide for Testing Materials for Aerospace Plastic Transparent Enclosures
• Effective Date: 01-Dec-2013

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F790 − 08
StandardGuide for
Testing Materials for Aerospace Plastic Transparent
1
Enclosures
ThisstandardisissuedunderthefixeddesignationF790;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D257Test Methods for DC Resistance or Conductance of
Insulating Materials
1.1 This guide is intended to summarize the standard test
D412TestMethodsforVulcanizedRubberandThermoplas-
methods available on individual and composite materials
tic Elastomers—Tension
utilized in fabrication of aerospace plastic transparent enclo-
D542Test Method for Index of Refraction of Transparent
sures.As such, it is intended to specifically include transparent
Organic Plastics
thermoplastics, transparent elastomers, and reinforced plastics,
D543Practices for Evaluating the Resistance of Plastics to
whether thermoplastic or thermosetting.
Chemical Reagents
1.2 This guide is intended as an aid in the search for test
D570Test Method for Water Absorption of Plastics
methods pertinent to Aerospace Plastic Transparent Enclo-
D624Test Method for Tear Strength of Conventional Vul-
sures. It should be understood that all methods listed may not
canized Rubber and Thermoplastic Elastomers
apply to all enclosures.
D638Test Method for Tensile Properties of Plastics
1.3 The standards included refer to the properties or aspects
D695Test Method for Compressive Properties of Rigid
listed in Table 1. The properties or aspects are listed in
Plastics
alphabetical order and the descriptions used are intended to
D696TestMethodforCoefficientofLinearThermalExpan-
facilitate the search.
sion of Plastics Between −30°C and 30°C with a Vitreous
1.4 This standard does not purport to address all of the
Silica Dilatometer
safety concerns, if any, associated with its use. It is the
D746Test Method for Brittleness Temperature of Plastics
responsibility of the user of this standard to establish appro-
and Elastomers by Impact
priate safety and health practices and determine the applica-
D785Test Method for Rockwell Hardness of Plastics and
bility of regulatory limitations prior to use.
Electrical Insulating Materials
2. Referenced Documents D790Test Methods for Flexural Properties of Unreinforced
2
and Reinforced Plastics and Electrical Insulating Materi-
2.1 ASTM Standards:
als
C117Test Method for Materials Finer than 75-µm (No. 200)
D792Test Methods for Density and Specific Gravity (Rela-
Sieve in Mineral Aggregates by Washing
tive Density) of Plastics by Displacement
D149Test Method for Dielectric Breakdown Voltage and
DielectricStrengthofSolidElectricalInsulatingMaterials D953Test Method for Bearing Strength of Plastics
at Commercial Power Frequencies D1003Test Method for Haze and Luminous Transmittance
D150Test Methods forAC Loss Characteristics and Permit- of Transparent Plastics
tivity (Dielectric Constant) of Solid Electrical Insulation D1004Test Method for Tear Resistance (Graves Tear) of
D256Test Methods for Determining the Izod Pendulum
Plastic Film and Sheeting
Impact Resistance of Plastics
D1044TestMethodforResistanceofTransparentPlasticsto
Surface Abrasion
D1238Test Method for Melt Flow Rates of Thermoplastics
1
ThisguideisunderthejurisdictionofASTMCommitteeF07onAerospaceand
Aircraft and is the direct responsibility of F07.08 on Transparent Enclosures and by Extrusion Plastometer
Materials.
D1499Practice for Filtered Open-Flame Carbon-Arc Expo-
Current edition approved April 1, 2008. Published April 2008. Originally
sures of Plastics
approved in 1988. Last previous edition approved in 2002 as F790–02. DOI:
10.1520/F0790-08. D1525Test Method for Vicat Softening Temperature of
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Plastics
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
D2240TestMethodforRubberProperty—DurometerHard-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ness
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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F790 − 08
TABLE 1 Property or Aspects of Aerospace Plastic Transparent
F319Practice for Polarized Light Detection of Flaws in
Enclosures
Aerospace Transparency Heating Elements
Property or Aspect Test Method
F320Test Method for Hail Impact Resistance of Aerospace
Abrasion Resistance D1044
Transparent Enclosures
Abrasion Resistance—Oscillating Sand F735
F330Test Method for Bird Impact Testing of Aerospace
Abrasion Testing—Sizing Sand for C117
Transparent Enclosures
Bearing Strength D953
Bird Impact Resistance F330
F484T
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
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 version
of the standard as published by ASTM is to be considered the official document.
Designation:F790–02 Designation:F790–08
Standard Guide for
Testing Materials for Aerospace Plastic Transparent
1
Enclosures
This standard is issued under the fixed designation F790; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This guide is intended to summarize the standard test methods available on individual and composite materials utilized in
fabrication of aerospace plastic transparent enclosures. As such, it is intended to specifically include transparent thermoplastics,
transparent elastomers, and reinforced plastics, whether thermoplastic or thermosetting.
1.2 This guide is intended as an aid in the search for test methods pertinent to Aerospace Plastic Transparent Enclosures. It
should be understood that all methods listed may not apply to all enclosures.
1.3 ThestandardsincludedrefertothepropertiesoraspectslistedinTable1.Thepropertiesoraspectsarelistedinalphabetical
order and the descriptions used are intended to facilitate the search.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C117 Test Method for Materials Finer Than 75-µmthan 75-m (No. 200) Sieve in Mineral Aggregates by Washing
D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at
Commercial Power Frequencies
D150 Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation
D256 Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics
D257 Test Methods for DC Resistance or Conductance of Insulating Materials
D412TestMethodsforVulcanizedRubberandThermoplasticRubbersandThermoelasticElastometersTension TestMethods
for Vulcanized Rubber and Thermoplastic ElastomersTension
D542 Test MethodsMethod for Index of Refraction of Transparent Organic Plastics
D543 Practices for Evaluating the Resistance of Plastics to Chemical Reagents
D570 Test Method for Water Absorption of Plastics
D624 Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers
D638 Test Method for Tensile Properties of Plastics
D695 Test Method for Compressive Properties of Rigid Plastics
D696 Test Method for Coefficient of Linear Thermal Expansion of Plastics Between−30° Between 30C and 30°C With30C
with a Vitreous Silica Dilatometer
D746 Test Method for Brittleness Temperature of Plastics and Elastomers by Impact
D785 Test Method for Rockwell Hardness of Plastics and Electrical Insulating Materials
D790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
D792 Test Methods for Density and Specific Gravity (Relative Density) and Density of Plastics by Displacement
D953 Test Method for Bearing Strength of Plastics
D1003 Test Method for Haze and Luminous Transmittance of Transparent Plastics
D1004 Test Method for Initial Tear Resistance (Graves Tear) of Plastic Film and Sheeting
D1044 Test Method for Resistance of Transparent Plastics to Surface Abrasion
1
This guide is under the jurisdiction of ASTM Committee F07 on Aerospace and Aircraft and is the direct responsibility of F07.08 on Transparent Enclosures and
Materials.
Current edition approved May 10, 2002. Published June 2002. Originally published as F790–88. Last previous edition F790–94.
Current edition approved April 1, 2008. Published April 2008. Originally approved in 1988. Last previous edition approved in 2002 as F790–02.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,[e-mail] Annual Book ofASTM Standards
, Vol 04.02.volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F790–08
TABLE 1 Property or Aspects of Aerospace Plastic Transparent
Enclosures
Property or Aspect Test Method
Abrasion Resistance D 1044
Abrasion Resistance—Oscillating Sand F 735
Abrasion Testing—S
...