ASTM F137-71(1994)e1
(Test Method)Standard Test Method for Flexibility of Resilient Flooring Materials with Cylindrical Mandrel Apparatus
Standard Test Method for Flexibility of Resilient Flooring Materials with Cylindrical Mandrel Apparatus
SCOPE
1.1 This test method covers the determination of the flexibility of resilient flooring materials by means of cylindrical mandrel apparatus. It is especially applicable to sheet goods and some tiles.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are for information 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 to determine the applicability of regulatory limitations prior to use.
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e1
Designation: F 137 – 71 (Reapproved 1994)
Standard Test Method for
Flexibility of Resilient Flooring Materials with Cylindrical
Mandrel Apparatus
This standard is issued under the fixed designation F 137; 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 (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.
e NOTE—Keywords were added in September 1994.
1. Scope 1°C (73.4 6 1.8°F) and 50 6 5 % relative humidity, and test
in the same environment. Alternatively, testing may be per-
1.1 This test method covers the determination of the flex-
formed at room temperature in an uncontrolled environment if
ibility of resilient flooring materials by means of cylindrical
carried out within 5 min.
mandrel apparatus. It is especially applicable to sheet goods
5.2 Specimens must be conditioned on a flat surface. If
and some tiles.
necessary, they can be weighted to remove all curvature.
2. Significance and Use
6. Procedure
2.1 Flexibility is that property of a material which allows it
6.1 In the actual flexing of the specimen, place the specimen
to be deformed by bending or rolling without cracking,
over a mandrel with the wearing surface face out and the major
breaking, or other permanent defects, using whatever force is
axis of the specimen perpendicular to the major axis of the
necessary to bend or roll it. Flexibility is an important
mandrel.
characteristic of flooring in that it provides for ease of handling
6.2 Holding the specimen at each end, bend the material
in rolling, cutting, and fitting.
around the mandrel through an angle of 180° at a uniform rate
3. Apparatus so as to require 3 to5sto complete the bend. Maintain a good
contact between specimen and mandrel.
3.1 Flexibility Test Equipment, consisting of mandrels, that
6.3 At the completion of the bending operation, examine the
is, cylindrical rods with circular cross sections having outside
specimen face visually in the bent position for breaks, cracks,
diameters from 10 to 120 mm (½ in. to 5 in.) in 10–mm (½-in.)
or other damage. When required by the detailed specification,
increments. The contacting faces of the rods shall be a
straighten the specimen at the same rate at which it was bent
minimum of 60 mm (2½ in.) in length.
and examine the back for the same faults.
3.2 Stand or Other Device, to firmly support the mandrel in
6.4 When a mandrel of particular diameter has been speci-
a horizontal position during the test.
fied, as for a purchase specification, use that mandrel.
3.3 Conditioning Area, capable of maintaining 23 6 1°C
6.5 When no particular mandrel has been specified, deter-
(73.4 6 1.8°F) and 50 6 5 % relative humidity.
mine the smallest mandrel around which the material may be
3.4 Die or Knife or similar instrument to prepare test
bent without showing breaks, cracks, or other damage. To do
specimens with uniform smooth edges.
this, estimate the size of the mandrel over which the specimen
4. Test Specimen
will not break. Then use a series of mandrels, each one
consecutively smaller than the first, until breaks or cracks are
4.1 The test specimens shall consist of a portion of the
exhibited. Start with a fresh specimen for each separate flex.
material 50 6 1.27 mm (2 6 0.05 in.) wide and at least 225
6.6 The exact number of test on a specified mandrel (6.4) or
mm (9 in.) long.
of the smallest mandrel around which the material will not
4.2 Prepare the specimen by means of a die, knife, or other
break (6.5) shall be as specified in the given
...
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