ASTM E990-09
(Specification)Standard Specification for Core-Splice Adhesive for Honeycomb Sandwich Shelter Panels
Standard Specification for Core-Splice Adhesive for Honeycomb Sandwich Shelter Panels
ABSTRACT
This specification covers the requirements for core-splice adhesive for use with nonmetallic honeycomb cores in the fabrication of honeycomb sandwich panels used in relocatable structures. The adhesive shall be thermosetting, of film form, and capable of expanding to several times its original thickness and shall be cured at specific curing time, temperature, and pressure. Materials shall be tested for physical properties qualification which shall conform to water migration, volatility, expansion, sag, density, flexural shear strength or assembly compatibility, and tube shear or core splice integrity requirements. The adhesive shall be suitable for application to core material, edge members, and integral parts.
SCOPE
1.1 This specification covers core-splice adhesive for use with nonmetallic honeycomb cores in the fabrication of honeycomb sandwich panels used in relocatable structures. The adhesive shall be used for new production or depot repair. The adhesive shall be suitable for forming bonds that can withstand long combinations of stress, temperature, and relative humidity expected to be encountered in service. The adhesive shall be used for bonding core segments and for bonding core segments to edge members and to integral members in a honeycomb sandwich panel. The adhesive shall not allow the transfer of water from one part of the panel to another either through or along the line of the adhesive.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The following precautionary caveat pertains only to the test method portion, Section 5, of this specification: 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.
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Designation:E990 −09
StandardSpecification for
Core-Splice Adhesive for Honeycomb Sandwich Structural
1
Panels
This standard is issued under the fixed designation E990; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope D792Test Methods for Density and Specific Gravity (Rela-
tive Density) of Plastics by Displacement
1.1 This specification covers core-splice adhesive for use
E864Practice for Surface Preparation of Aluminum Alloys
with nonmetallic honeycomb cores in the fabrication of hon-
to Be Adhesively Bonded in Honeycomb Shelter Panels
eycomb sandwich panels used in relocatable structures. The
E865Specification for Structural Film Adhesives for Hon-
adhesive shall be used for new production or depot repair.The
eycomb Sandwich Panels
adhesiveshallbesuitableforformingbondsthatcanwithstand
E874Practice for Adhesive Bonding of Aluminum Facings
longcombinationsofstress,temperature,andrelativehumidity
to Nonmetallic Honeycomb Core for Shelter Panels
expected to be encountered in service. The adhesive shall be
E1091Specification for Nonmetallic Honeycomb Core for
usedforbondingcoresegmentsandforbondingcoresegments
Use in Shelter Panels
to edge members and to integral members in a honeycomb
2.2 Federal Standards:
sandwich panel. The adhesive shall not allow the transfer of
3
QQ-A-250/4Aluminum Alloy 2024, Plate and Sheet
water from one part of the panel to another either through or
3
QQ-A-250/8dAluminum Alloy 5052H34, Plate and Sheet
along the line of the adhesive.
3
QQ-A-250/11dAluminum Alloy 6061T6, Plate and Sheet
1.2 The values stated in SI units are to be regarded as the
2.3 Military Standards:
standard. The values given in parentheses are for information
MIL-S-8802Sealing Compound,Temperature-Resistant, In-
only. 3
tegralFuelTanks,andFuelCellCavities,High-Adhesion
1.3 The following precautionary caveat pertains only to the
3. Materials and Manufacture
test method portion, Section 5, of this specification: This
standard does not purport to address all of the safety concerns,
3.1 The adhesive shall be free of foreign materials, be
if any, associated with its use. It is the responsibility of the user
noncorrosive to the metal parts, and have the structural
of this standard to establish appropriate safety and health
integrity equal to or better than that of an unspliced panel
practices and determine the applicability of regulatory limita-
section as specified in Table 1, Flexural Sheer.
tions prior to use.
4. Requirements
2. Referenced Documents
4.1 Material—The adhesive shall be thermosetting and
2
when tested in accordance with Section 5, shall meet the
2.1 ASTM Standards:
requirements of Table 1. The adhesive shall not have a
B209Specification for Aluminum and Aluminum-Alloy
deleterious effect on the panel nor on its component parts over
Sheet and Plate
the range of temperature at which the adhesive will be used.
C393Test Method for Flexural Properties of Sandwich
This adhesive shall be compatible and capable of co-curing
Constructions
with the structural film adhesive (Specification E865) used to
fabricate the panel.
1
This specification is under the jurisdiction of ASTM Committee E06 on 4.2 Form—The adhesive shall be of film form either 1.27
Performance of Buildings and is the direct responsibility of Subcommittee E06.53
mm (0.051 in.) or 2.54 mm (0.100 in.) thick and shall be
on Materials and Processes for Durable Rigidwall Relocatable Structures.
capable of expanding to at least 1.75 times its original
Current edition approved Nov. 1, 2009. Published December 2009. Originally
thickness.
approved in 1984. Last previous edition approved in 2004 as E990–04. DOI:
10.1520/E0990-09.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Standards volume information, refer to the standard’s Document Summary page on Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
the ASTM website. dodssp.daps.dla.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E990−09
TABLE 1 Physical Properties Qualification Requirements
Reference
Table Requirements
Paragraph
Water migration 5.1 Not more than the volume of
the cavity (in cell)
Volatility 5.2 1 % maximum
Expansion 5.3 1.75 minimum ratio
Sag for 1.27 mm (0.05 in.) 5.4 3.8 mm (0.15 in.) m
...
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:E990–04 Designation: E990 – 09
Standard Specification for
Core-Splice Adhesive for Honeycomb Sandwich Structural
1
Panels
This standard is issued under the fixed designation E990; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 This specification covers core-splice adhesive for use with nonmetallic honeycomb cores in the fabrication of honeycomb
sandwich panels used in relocatable structures. The adhesive shall be used for new production or depot repair. The adhesive shall
be suitable for forming bonds that can withstand long combinations of stress, temperature, and relative humidity expected to be
encountered in service. The adhesive shall be used for bonding core segments and for bonding core segments to edge members
and to integral members in a honeycomb sandwich panel. The adhesive shall not allow the transfer of water from one part of the
panel to another either through or along the line of the adhesive.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The following precautionary caveat pertains only to the test method portion, Section 5, of this specification: 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:
B209 Specification for Aluminum and Aluminum-Alloy Sheet and Plate
C393 Test Method for Flexural Properties of Sandwich Constructions
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
E864 Practice for Surface Preparation of Aluminum Alloys to Be Adhesively Bonded in Honeycomb Shelter Panels
E865 Specification for Structural Film Adhesives for Honeycomb Sandwich Panels
E874 Practice for Adhesive Bonding of Aluminum Facings to Nonmetallic Honeycomb Core for Shelter Panels
E1091 Specification for Nonmetallic Honeycomb Core for Use in Shelter Panels
2.2 Federal Standards:
3
QQ-A-250/4 Aluminum Alloy 2024, Plate and Sheet
3
QQ-A-250/8d Aluminum Alloy 5052H34, Plate and Sheet
3
QQ-A-250/11d Aluminum Alloy 6061T6, Plate and Sheet
2.3 Military Standards:
3
MIL-S-8802 Sealing Compound, Temperature-Resistant, Integral Fuel Tanks, and Fuel Cell Cavities, High-Adhesion
3. Materials and Manufacture
3.1 The adhesive shall be free of foreign materials, be noncorrosive to the metal parts, and have the structural integrity equal
to or better than that of an unspliced panel section as specified in Table 1, Flexural Sheer.
4.Requirements Requirements
4. Requirements
4.1 Material—The adhesive shall be thermosetting and when tested in accordance with Section 5, shall meet the requirements
of Table 1. The adhesive shall not have a deleterious effect on the panel nor on its component parts over the range of temperature
1
This specification is under the jurisdiction ofASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.53 on Materials
and Processes for Durable Rigid Wall Rigidwall Relocatable Structures.
Current edition approved AprilNov. 1, 2004.2009. Published April 2004.December 2009. Originally approved in 1984. Last previous edition approved in 19982004 as
E990–98.E990–04. DOI: 10.1520/E0990-049.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://dodssp.daps.dla.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
E990 – 09
TABLE 1 Physical Properties Qualification Requirements
Reference
Table Requirements
Paragraph
Water migration 5.1 Not more than the volume of
the cavity (in cell)
Volatility 5.2 1 % maximum
Expansion 5.3 1.75 minimum ratio
Sag for 1.27 m
...
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