ASTM E1794-13

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.
SIGNIFICANCE AND USE
5.1 This specification is intended to provide information on the properties of adhesives, and the test methods required to evaluate adhesives to be used in the production bonding of aluminum alloys to foam core materials for the manufacture of tactical shelters.
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, internal aluminum framing members, 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 inch-pound units; where inch-pound units are given first followed by SI units, the inch-pound 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: 30-Sep-2013
• ICS: 83.180 - Adhesives
• Technical Committee: E06 - Performance of Buildings
• Drafting Committee: E06.53 - Materials and Processes for Durable Rigidwall Relocatable Structures

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:E1794 −13
Standard Specification for
Adhesive for Bonding Foam Cored Sandwich Panels (200°F
1
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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope E864Practice for Surface Preparation of Aluminum Alloys
to Be Adhesively Bonded in Honeycomb Shelter Panels
1.1 Thisspecificationcoverstwo-partadhesivesforbonding
E1749Terminology Relating to Rigid Wall Relocatable
foamcoresandwichpanels.Theadhesivemaybeusedfornew
Shelters
production or depot maintenance. The adhesive should be
3
2.2 Military Standard:
suitable for forming bonds that can withstand long-term
MIL-STD-202FTest Methods for Electronic and Electrical
exposuretotemperaturesfrom−55to93°C(−67to200°F)and
Component Parts
alsowithstandcombinationsofstress,temperature,andhumid-
3
2.3 Federal Specification:
ity expected to be encountered in service. The adhesives shall
QQ-A-250/11dAluminum Alloy 6061 T6 Plate and Sheet
be used for bonding aluminum alloy facing to foam core,
inserts, internal aluminum framing members, and other com-
3. Terminology
ponents of a foam cored sandwich panel.
3.1 Definitions—See Terminologies E631 and E1749 for
1.2 The values stated in SI units are to be regarded as the
definitions of terms used in this specification.
standard where only SI units are given or where SI units are
3.2 Definitions of Terms Specific to This Standard:
given first followed by inch-pound units; where inch-pound
3.2.1 adhesive life—the maximum time that an adhesive,
units are given first followed by SI units, the inch-pound units
when mixed in a prescribed quantity can set at a designated
are to be regarded as the standard.
temperature, after which the adhesive, when used to prepare
1.3 This standard does not purport to address all of the
specimens, will deliver the required properties.
safety concerns, if any, associated with its use. It is the
4. Requirements
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4.1 Material—The adhesive shall be a two-part thermoset-
bility of regulatory limitations prior to use.
tingepoxypastecontainingnoasbestosand,whentestedusing
the test methods described in Section 6, shall meet the
2. Referenced Documents
requirements of Section 4. The adhesive shall not have a
2
deleterious effect on the components being bonded over the
2.1 ASTM Standards:
range of temperatures at which the adhesive will be used.
B209Specification for Aluminum and Aluminum-Alloy
Sheet and Plate
4.2 Working Characteristics:
D1002Test Method for Apparent Shear Strength of Single-
4.2.1 Application—The adhesive shall be suitable for appli-
Lap-Joint Adhesively Bonded Metal Specimens by Ten-
cation to facings and foam core materials. The adhesive shall
sion Loading (Metal-to-Metal)
be suitable for spray application to faying surfaces.
E631Terminology of Building Constructions
4.2.2 Curing—The time, temperature, and pressure used to
cure the adhesive shall be within the range specified herein.
4.2.2.1 Curing Time and Temperature—The adhesive, when
1
mixedinaccordancewiththemanufacturer’sinstructions,shall
This specification is under the jurisdiction of ASTM Committee E06 on
Performance of Buildings and is the direct responsibility of Subcommittee E06.53
meet the requirements of this specification when cured at a
on Materials and Processes for Durable Rigidwall Relocatable Structures.
temperature of not more than 99°C (210°F) for 60 min, or
Current edition approved Oct. 1, 2013. Published February 2014. Originally
107°C (225°F) for 45 min. The timing of the cure shall start
approved in 1996. Last previous edition approved in 2008 as E1794–08. DOI:
10.1520/E1794-13. when the panel skins have reached the specified temperature.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from DLA Document Services, Building 4/D, 700 Robbins Avenue,
the ASTM website. Philadelphia, PA 19111-5094, http://quicksearch.dla.mil/.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E1794−13
The temperature for the cure shall be fully attained within 3 h min just prior to test. Stabilize the chamber used to
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM 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: E1794 − 08 E1794 − 13
Standard Specification for
Adhesive for Bonding Foam Cored Sandwich Panels (200°F
1
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. A number 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 U.S. Department of Defense.
1. 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, internal aluminum
framing members, 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 inch-pound units; where inch-pound units are given first followed by SI units, the inch-pound 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.
2. Referenced Documents
2
2.1 ASTM Standards:
B209 Specification for Aluminum and Aluminum-Alloy Sheet and Plate
D1002 Test Method for Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens by Tension Loading
(Metal-to-Metal)
E631 Terminology of Building Constructions
E864 Practice for Surface Preparation of Aluminum Alloys to Be Adhesively Bonded in Honeycomb Shelter Panels
E1749 Terminology Relating to Rigid Wall Relocatable Shelters
3
2.2 Military Standard:
MIL-STD-202F Test Methods for Electronic and Electrical Component Parts
3
2.3 Federal Specification:
QQ-A-250/11d Aluminum Alloy 6061 T6 Plate and Sheet
3. Terminology
3.1 Definitions—See TerminologyTerminologies E631 and E1749 for definitions of terms used in this specification.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 adhesive life—the maximum time that an adhesive, when mixed in a prescribed quantity can set at a designated
temperature, after which the adhesive, when used to prepare specimens, will deliver the required properties.
1
This specification is under the jurisdiction of ASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.53 on Materials
and Processes for Durable Rigidwall Relocatable Structures.
Current edition approved Nov. 1, 2008Oct. 1, 2013. Published December 2008February 2014. Originally approved in 1996. Last previous edition approved in 20032008
as E1794 – 03.E1794 – 08. DOI: 10.1520/E1794-08.10.1520/E1794-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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://www.dodssp.daps.mil.DLA
Document Services, Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, http://quicksearch.dla.mil/.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E1794 − 13
4. Requirements
4.1 Material—The adhesive shall be a two-part thermosetting epoxy paste containing no asbestos and, when tested using the
test methods described in Section 6, shall meet the requirements of Section 4. The adhesive shall not have a deleterious effect on
the components being bonded over the range of temperatures at which the adhesive will be used.
4.2 Working Characteristics:
4.2.1 Application—The adhesive shall be suitable for application to facings and foam core materials. The adhesive shall be
suitable for spray application to faying surfaces.
4.2.2 Curing—The time, temperature, and pre
...