ASTM E990-04
(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 shelters. 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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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: E990 – 04
Standard Specification for
Core-Splice Adhesive for Honeycomb Sandwich Structural
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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 E864 Practice for Surface Preparation ofAluminumAlloys
to Be Adhesively Bonded in Honeycomb Shelter Panels
1.1 This specification covers core-splice adhesive for use
E865 Specification for Structural Film Adhesives for Hon-
with nonmetallic honeycomb cores in the fabrication of hon-
eycomb Sandwich Panels
eycomb sandwich panels used in relocatable structures. The
E874 Practice forAdhesive Bonding ofAluminum Facings
adhesive shall be used for new production or depot repair.The
to Nonmetallic Honeycomb Core for Shelter Panels
adhesiveshallbesuitableforformingbondsthatcanwithstand
E1091 Specification for Nonmetallic Honeycomb Core for
longcombinationsofstress,temperature,andrelativehumidity
Use in Shelter Panels
expected to be encountered in service. The adhesive shall be
2.2 Federal Standards:
usedforbondingcoresegmentsandforbondingcoresegments
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QQ-A-250/4 Aluminum Alloy 2024, Plate and Sheet
to edge members and to integral members in a honeycomb
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QQ-A-250/8d Aluminum Alloy 5052H34, Plate and Sheet
sandwich panel. The adhesive shall not allow the transfer of
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QQ-A-250/11d Aluminum Alloy 6061T6, Plate and Sheet
water from one part of the panel to another either through or
2.3 Military Standards:
along the line of the adhesive.
MIL-S-8802 Sealing Compound, Temperature-Resistant,
1.2 The values stated in SI units are to be regarded as the
Integral Fuel Tanks, and Fuel Cell Cavities, High-
standard. The values given in parentheses are for information
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Adhesion
only.
1.3 The following precautionary caveat pertains only to the
3. Materials and Manufacture
test method portion, Section 5, of this specification: This
3.1 The adhesive shall be free of foreign materials, be
standard does not purport to address all of the safety concerns,
noncorrosive to the metal parts, and have the structural
if any, associated with its use. It is the responsibility of the user
integrity equal to or better than that of an unspliced panel
of this standard to establish appropriate safety and health
section as specified in Table 1, Flexural Sheer.
practices and determine the applicability of regulatory limita-
tions prior to use.
4. Requirements Requirements
4.1 Material—The adhesive shall be thermosetting and
2. Referenced Documents
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
B209 Specification 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.
C393 Test 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
D792 Test Methods for Density and Specific Gravity (Rela-
fabricate the panel.
tive Density) of Plastics by Displacement
4.2 Form—The adhesive shall be of film form either 1.27
mm (0.051 in.) or 2.54 mm (0.100 in.) thick and shall be
capable of expanding to at least 1.75 times its original
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This specification is under the jurisdiction of ASTM Committee E06 on
thickness.
Performance of Buildings and is the direct responsibility of Subcommittee E06.53
on Materials and Processes for Durable Rigid Wall Relocatable Structures.
4.3 Working Characteristics:
Current edition approved April 1, 2004. Published April 2004. Originally
4.3.1 Application—The adhesive shall be suitable for appli-
approved in 1984. Last previous edition approved in 1998 as E990–98. DOI:
cation to core material, edge members, and integral parts in
10.1520/E0990-04.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
the ASTM website. Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E990 – 04
TABLE 1 Physical Properties Qualification Requirements
Reference
Table Requirements
Paragraph
Water migration 5.1 Not mo
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