ASTM E1794-03

Standard Specification for Adhesive for Bonding Foam Cored Sandwich Panels (200°F Elevated Humidity Service), Type II Panels

ABSTRACT
This specification covers two-part adhesives for bonding aluminum alloy facing to foam core, inserts, edge attachments, and other components of a Type II foam cored sandwich panels. The adhesive should be suitable for forming bonds that can withstand long-term exposure at specified temperatures, and different combinations of stress, temperature, and humidity expected to be encountered in service. The adhesive may be used for new production or depot maintenance. The adhesive shall be a two-part thermosetting epoxy paste containing no asbestos and, when tested, shall meet the following physical and mechanical property requirements: curing time, temperature, and pressure; mix ratio; storage life; adhesive life; room-, low-, and high-temperature shear; hot humidity exposure shear; and room-temperature salt spray exposure shear.
SCOPE
1.1 This specification covers two-part adhesives for bonding foam core sandwich panels. The adhesive may be used for new production or depot maintenance. The adhesive should be suitable for forming bonds that can withstand long-term exposure to temperatures from -55 to 93°C (-67 to 200°F) and also withstand combinations of stress, temperature, and humidity expected to be encountered in service. The adhesives shall be used for bonding aluminum alloy facing to foam core, inserts, edge attachments, and other components of a foam cored sandwich panel.
1.2 The values stated in SI units are to be regarded as the standard where only SI units are given or where SI units are given first followed by English units; where English units are given first followed by SI units, the English units are to be regarded as the standard.
1.3 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: 09-Apr-2003
• ICS: 83.180 - Adhesives
• Technical Committee: E06 - Performance of Buildings
• Drafting Committee: E06.53 - Materials and Processes for Durable Rigidwall Relocatable Structures

Relations

• Replaces: ASTM E1794-00 - Standard Specification for Adhesive for Bonding Foam Cored Sandwich Panels (200^oF Elevated Humidity Service), Type II Panels
• Effective Date: 10-Apr-2003
• Replaced By: ASTM E1794-08 - Standard Specification for Adhesive for Bonding Foam Cored Sandwich Panels (200°F Elevated Humidity Service), Type II Panels
• Effective Date: 01-Nov-2008
• Referred By: ASTM E1801-21 - Standard Practice for Adhesive Bonding of Aluminum Facings in Foam and Beam Type Shelters
• Effective Date: 10-Apr-2003
• Referred By: ASTM E1793-19 - Standard Practice for Preparation of Aluminum Alloy for Bonding in Foam and Beam Type Transportable Shelters
• Effective Date: 10-Apr-2003
• Referred By: ASTM E1975-22 - Standard Specification for Shelter, Electrical, Equipment S-280/G
• Effective Date: 10-Apr-2003

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: E 1794 – 03
Standard Specification for
Adhesive for Bonding Foam Cored Sandwich Panels (200°F
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Elevated Humidity Service), Type II Panels
This standard is issued under the fixed designation E1794; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope MIL-STD-202F Test Methods for Electronic and Electrical
5
Component Parts
1.1 Thisspecificationcoverstwo-partadhesivesforbonding
2.3 Federal Specification:
foamcoresandwichpanels.Theadhesivemaybeusedfornew
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QQ-A-250/11d AluminumAlloy 6061T6, Plate and Sheet
production or depot maintenance. The adhesive should be
suitable for forming bonds that can withstand long-term
3. Terminology
exposure to temperatures from−55 to 93°C (−67 to 200°F)
3.1 Definitions—See Terminology E1749 for definitions of
and also withstand combinations of stress, temperature, and
terms used in this specification.
humidity expected to be encountered in service.The adhesives
3.2 Definitions of Terms Specific to This Standard:
shall be used for bonding aluminum alloy facing to foam core,
3.2.1 adhesive life—the maximum time that an adhesive,
inserts, edge attachments, and other components of a foam
when mixed in a prescribed quantity can set at a designated
cored sandwich panel.
temperature, after which the adhesive, when used to prepare
1.2 The values stated in SI units are to be regarded as the
specimens, will deliver the required properties.
standard where only SI units are given or where SI units are
given first followed by English units; where English units are
4. Requirements
given first followed by SI units, the English units are to be
4.1 Material—The adhesive shall be a two-part thermoset-
regarded as the standard.
tingepoxypastecontainingnoasbestosand,whentestedusing
1.3 This standard does not purport to address all of the
the test methods described in Section 6, shall meet the
safety concerns, if any, associated with its use. It is the
requirements of Section 4. The adhesive shall not have a
responsibility of the user of this standard to establish appro-
deleterious effect on the components being bonded over the
priate safety and health practices and determine the applica-
range of temperatures at which the adhesive will be used.
bility of regulatory limitations prior to use.
4.2 Working Characteristics:
4.2.1 Application—The adhesive shall be suitable for appli-
2. Referenced Documents
cation to facings and foam core materials. The adhesive shall
2.1 ASTM Standards:
be suitable for spray application to faying surfaces.
B209 Specification for Aluminum and Aluminum-Alloy
2 4.2.2 Curing—The time, temperature, and pressure used to
Sheet and Plate
cure the adhesive shall be within the range specified herein.
D1002 TestMethodforApparentShearStrengthofSingle-
4.2.2.1 Curing Time and Temperature—Theadhesive,when
Lap-Joint Adhesively Bonded Metal Specimens by Ten-
3 mixedinaccordancewiththemanufacturer’sinstructions,shall
sion Loading (Metal-to-Metal)
meet the requirements of this specification when cured at a
E864 Practice for Surface Preparation ofAluminumAlloys
4 temperature of not more than 99°C (210°F) for 60 min, or
to be Adhesively Bonded in Honeycomb Shelter Panels
4
107°C (225°F) for 45 min. The timing of the cure shall start
E1749 Terminology of Rigid Wall Relocatable Shelters
when the panel skins have reached the specified temperature.
2.2 Military Standard:
The temperature for the cure shall be fully attained within 3 h
after the first application of the adhesive to the faying surface.
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This specification is under the jurisdiction of ASTM Committee E06 on
4.2.2.2 Curing Pressure—Specimens for testing under this
Performance of Buildings and is the direct responsibility of Subcommittee E06.53
specificationshallbecuredunderanormalloadof50 614kPa
on Materials and Processes for Durable Rigidwall Relocatable Structures.
(8.0 6 1.0 psi). No more than2hat 25°C (77°F) shall elapse
Current edition approved April 10, 2003. Published May 2003. Originally
approved in 1996. Last previous edition approved in 2000 as E 1794–00.
2
Annual Book of ASTM Standards, Vol 02.02.
3 5
Annual Book of ASTM Standards, Vol 15.06. AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
4
Annual Book of ASTM Standards, Vol 04.11. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E1794–03
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