ASTM F942-93

Standard Guide for Selection of Test Methods for Interlayer Materials for Aerospace Transparent Enclosures

SCOPE
1.1 This guide summarizes the standard test methods available for determining physical and mechanical characteristics of interlayer materials used in multi-ply aerospace transparent enclosures.  
1.2 Interlayer materials are used to laminate glass-to-glass, glass-to-plastic, and plastic-to-plastic. Interlayer materials are basically transparent adhesives with high-quality optical properties. They can also serve as an energy absorbing medium, a fail-safe membrane to contain cockpit pressure and to prevent entry of impact debris; a strain insulator to accommodate different thermal expansion rates of members being laminated and as an adherent to prevent spalling of inner surface ply material fragments. The relative importance of an interlayer characteristic will be a function of the prime use it serves in its particular application.  
1.3 This guide, as a summary of various methods in Section 2, is intended to facilitate the selection of tests that can be applied to interlayer materials.  
1.4 The test methods listed are for use in determining basic design characteristics and in assuring lot-to-lot uniformity of the materials being tested except as noted in 3.3.

General Information

• Status: Historical
• Publication Date: 31-Dec-1992
• ICS: 49.025.50 - Adhesives
• Technical Committee: F07 - Aerospace and Aircraft
• Drafting Committee: F07.08 - Transparent Enclosures and Materials

Relations

• Replaced By: ASTM F942-02 - Standard Guide for Selection of Test Methods for Interlayer Materials for Aerospace Transparent Enclosures
• Effective Date: 10-May-2002
• Referred By: ASTM F790-23 - Standard Guide for Testing Materials for Aerospace Plastic Transparent Enclosures
• Effective Date: 01-Jan-1993

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 942 – 93
Standard Guide for
Selection of Test Methods for Interlayer Materials for
Aerospace Transparent Enclosures
This standard is issued under the fixed designation F 942; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 569 Test Method for Measuring the Flow Properties of
Thermoplastic Molding Materials
1.1 This guide summarizes the standard test methods avail-
D 570 Test Method for Water Absorption of Plastics
able for determining physical and mechanical characteristics of
D 696 Test Method for Coefficient of Linear Thermal Ex-
interlayer materials used in multi-ply aerospace transparent
pansion of Plastics Between −30°C and 30°C
enclosures.
D 792 Test Methods for Specific Gravity (Relative Density)
1.2 Interlayer materials are used to laminate glass-to-glass,
and Density of Plastics by Displacement
glass-to-plastic, and plastic-to-plastic. Interlayer materials are
D 1003 Test Method for Haze and Luminous Transmittance
basically transparent adhesives with high-quality optical prop-
of Transparent Plastics
erties. They can also serve as an energy absorbing medium, a
D 1004 Test Method for Initial Tear Resistance of Plastic
fail-safe membrane to contain cockpit pressure and to prevent
Film and Sheeting
entry of impact debris; a strain insulator to accommodate
D 1045 Methods of Sampling and Testing Plasticizers Used
different thermal expansion rates of members being laminated
in Plastics
and as an adherent to prevent spalling of inner surface ply
D 1204 Test Method for Linear Dimensional Changes of
material fragments. The relative importance of an interlayer
Nonrigid Thermoplastic Sheeting or Film at Elevated
characteristic will be a function of the prime use it serves in its
Temperature
particular application.
D 1824 Test Method for Apparent Viscosity of Plastisols
1.3 This guide, as a summary of various methods in Section
and Organosols at Low Shear Rates by Brookfield Vis-
2, is intended to facilitate the selection of tests that can be
cometer
applied to interlayer materials.
D 1925 Test Method for Yellowness Index of Plastics
1.4 The test methods listed are for use in determining basic
D 2240 Test Method for Rubber Property—Durometer
design characteristics and in assuring lot-to-lot uniformity of
Hardness
the materials being tested except as noted in 3.3.
D 2766 Test Method for Specific Heat of Liquids and
2. Referenced Documents Solids
D 2857 Test Method for Dilute Solution Viscosity of Poly-
2.1 ASTM Standards:
mers
C 177 Test Method for Steady-State Heat Flux Measure-
D 3167 Test Method for Floating Roller Peel Resistance of
ments and Thermal Transmission Properties by Means of
Adhesives
the Guarded Hot-Plate Apparatus
D 3465 Practice for Purity of Monomeric Plasticizers by
D 149 Test Method for Dielectric Breakdown Voltage and
Gas Chromatography
Dielectric Strength of Solid Electrical Insulating Materials
D 3835 Test Method for Determination of Properties of
at Commercial Power Frequencies
Polymeric Materials by Means of a Capillary Rheometer
D 412 Test Methods for Vulcanized Rubber and Thermo-
F 520 Test Method for Environmental Resistance of Aero-
plastic Rubbers and Thermoplastic Elastomers-Tension
space Transparencies
D 542 Test Methods for Index of Refraction of Transparent
F 521 Test Methods for Bond Integrity of Transparent
Organic Plastics
Laminates
F 943 Test Method for Measuring Halation of Transparent
1 Parts
This guide is under the jurisdiction of ASTM Committee F-7 on Aerospace and
F 1164 Test Method for Evaluation of Transparent Plastics
Aircraft and is the direct responsibility of Subcommittee F07.08 on Transparent
Enclosures and Materials.
Current edition approved Jan. 15, 1993. Published March 1993. Originally
...