ASTM D906-98(2011)
(Test Method)Standard Test Method for Strength Properties of Adhesives in Plywood Type Construction in Shear by Tension Loading
Standard Test Method for Strength Properties of Adhesives in Plywood Type Construction in Shear by Tension Loading
SIGNIFICANCE AND USE
The way adhesives are used in plywood makes shear strength an important performance criteria.
Shear strength measured by this test is suitable for use in adhesive development, manufacturing quality control, and in materials performance specifications.
SCOPE
1.1 This test method covers the determination of the comparative shear strengths of adhesives in plywood-type construction, when tested on a standard specimen and under specified conditions of preparation, conditioning, and testing. This test method is intended to be applied only to adhesives used in bonding wood to wood.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.
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
Relations
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D906 − 98 (Reapproved 2011)
Standard Test Method for
Strength Properties of Adhesives in Plywood Type
Construction in Shear by Tension Loading
This standard is issued under the fixed designation D906; 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.
INTRODUCTION
The accuracy of the results of strength tests of adhesive bonds will depend on the conditions under
which the bonding process is carried out. Unless otherwise agreed upon between the manufacturer and
the purchaser, the bonding conditions shall be prescribed by the manufacturer of the adhesive. In order
to ensure that complete information is available to the individual conducting the tests, the
manufacturer of the adhesive shall furnish numerical values and other specific information for each of
the following variables:
(1) The moisture content of the wood at the time of bonding.
(2) Complete mixing directions for the adhesive.
(3) Conditions for application of the adhesive including the rate of spread or thickness of film,
number of coats to be applied, whether more than one coat is required.
(4) Assembly conditions before application of pressure, including the room temperature, length of
time, and whether open or closed assembly is to be used.
(5) Curing conditions, including the amount of pressure to be applied, the length of time under
pressure and the temperature of the assembly when under pressure. It should be stated whether this
temperature is that of the bond line, or of the atmosphere at which the assembly is to be maintained.
(6) Conditioning procedure before testing, unless a standard procedure is specified, including the
length of time, temperature, and relative humidity.
Arange may be prescribed for any variable by the manufacturer of the adhesive if it can be assumed
by the test operator that any arbitrarily chosen value within such a range or any combination of such
values for several variables will be acceptable to both the manufacturer and the purchaser of the
adhesive.
1. Scope 1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This test method covers the determination of the com-
responsibility of the user of this standard to establish appro-
parative shear strengths of adhesives in plywood-type
priate safety and health practices and determine the applica-
construction, when tested on a standard specimen and under
bility of regulatory limitations prior to use.
specified conditions of preparation, conditioning, and testing.
This test method is intended to be applied only to adhesives
2. Referenced Documents
used in bonding wood to wood.
2.1 ASTM Standards:
1.2 The values stated in SI units are to be regarded as the
D143 Test Methods for Small Clear Specimens of Timber
standard. The values given in parentheses are provided for
D907 Terminology of Adhesives
information purposes only.
3. Terminology
3.1 Definitions:
This test method is under the jurisdiction of ASTM Committee D14 on
Adhesives and is the direct responsibility of Subcommittee D14.30 on Wood
Adhesives. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2011. Published April 2011. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1947. Last previous edition approved in 2004 as D906 – 98 (2004). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/D0906-98R11. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D906 − 98 (2011)
3.1.1 Many terms in this test method are defined in Termi- developed under the conditions prescribed in Section 8 is not
nology D907. noticeably altered during testing.
3.1.2 plywood, n—a panel generally flat built up of layers of
6. Test Specimens
veneer called plies, united under pressure by an adhesive to
create a panel with the bond between the plies as strong as, or
6.1 The test specimens shall conform to the form and
stronger than, the wood, and that has the following character-
dimensions shown in Fig. 2. The specimens shall be cut from
istics: (1) is constructed of an odd number of layers with grain
test panels prepared as described in Sections 7 and 8.
of adjacent layers perpendicular, (2) with a layer consisting of
6.2 At least 40 specimens, representing at least five different
either a single ply or two or more plies laminated with parallel
panels, shall be prepared, selected and tested as prescribed in
grain direction, and (3) with outer layers and all odd numbered
Sections 9 and 10.
layers generally having the grain direction oriented parallel to
the long dimension of the panel.
7. Preparation and Test Panels
3.1.2.1 Discussion—Generally, the grain of one or more
7.1 The standard substrate for this test method is 1.6–mm
plies is approximately at right angles to the other plies, and
(1/16–in.) thick rotary-cut or sliced veneer of sweet birch
almost always an odd number of plies are used.
(Betula lenta) or yellow birch (Betula alleghaniensis). Any
3.1.3 shear, n—in an adhesively bonded joint, stress, strain
other thickness or species of veneer may be substituted upon
or failure resulting from applied forces that tend to cause
written agreement between the party requesting this test and
adjacent planes of a body to slide parallel in opposite direc-
the manufacturer of the adhesive. Select veneer that is free of
tions.
defects such as knots or distorted grain around knots, cracks,
4. Significance and Use short grain (fibers out of plane), rough surfaces, or unusual
discoloration that would indicate decay. Do not sand the
4.1 The way adhesives are used in plywood makes shear
veneer.
strength an important performance criteria.
7.2 Cut the selected veneer into a size suitable for pressing
4.2 Shearstrengthmeasuredbythistestissuitableforusein
and for cutting specimens with minimal waste. Allow at least
adhesive development, manufacturing quality control, and in
⁄2-in. (13 mm) for trim around the edges.
materials performance specifications.
NOTE 1—When cutting the veneer to size, ensure that the fiber direction
5. Apparatus
is parallel and perpendicular to the edges.Appearances may be deceptive.
If there is any question, the fiber direction should be checked with an
5.1 The testing machine shall be adjusted to a loading rate
scratch awl.
of between 4535 and 7560 g/s (600 and 1000 lb/min). Where
7.3 Condition the veneer to within 61 % of the moisture
the testing machine is adjusted by rate of crosshead movement
content recommended by the adhesive manufacturer or the
rather than load application rate, an appropriate head move-
party requesting this test. In the absence of any guideline,
ment rate shall be selected so as to yield an avera
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.