ASTM D5458-95(2001)
(Test Method)Standard Test Method for Peel Cling of Stretch Wrap Film
Standard Test Method for Peel Cling of Stretch Wrap Film
SCOPE
1.1 This test method measures cling between two layers of film, in both a stretched and unstretched condition.
1.2 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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Designation:D5458–95 (Reapproved 2001)
Standard Test Method for
Peel Cling of Stretch Wrap Film
This standard is issued under the fixed designation D 5458; 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.
1. Scope inclined surface. The force required to remove the film strip
from the flat film is measured.
1.1 This test method measures cling between two layers of
film, in both a stretched and unstretched condition.
5. Significance and Use
1.2 This standard does not purport to address all of the
5.1 Cling is of critical importance in maintaining a tight
safety concerns, if any, associated with its use. It is the
wrap after a load is stretch wrapped.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Equipment and Preparation
bility of regulatory limitations prior to use.
6.1 Apparatus—Auniversaltestingmachinewithaconstant
2. Referenced Documents rate of grip separation equipped, as follows:
2 6.1.1 One lightweight jaw equipped with 1 by 1.5 in. (25 by
2.1 ASTM Standards:
38 mm) flat rubber-faced grips,
D 996 Terminology of Packaging and Distribution Environ-
6.1.2 Cling attachment (see Figs. 1-5),
ments
6.1.3 Cling clamp (see Fig. 6),
D 1898 Practice for Sampling of Plastics
6.1.4 Load cell, 500-g load capacity,
D 4332 Practice for Conditioning Containers, Packages, or
6.1.5 If using pneumatic grips, air supply, 60 to 70 psi with
Packaging Components for Testing
appropriate filter,
E 122 Practice for Calculating Sample Size to Estimate,
6.1.6 Sample template, picture-frame style with inside di-
With a Specified Tolerable Error, the Average for a
mensions of 5 by 20 in. (125 by 500 mm),
Characteristic of a Lot or Process
6.1.7 Precision sample cutter, 1 6 0.001 in. (25.4 mm 6
E 691 Practice for Conducting an Interlaboratory Study to
0.03 mm) width, with precision of 1 6 0.001 in. (25.4 6 0.03
Determine the Precision of a Test Method
mm),
3. Terminology 6.1.8 Single-edged safety razor blade,
6.1.9 Synthetic bristle paint brush, 2 in. (50 mm) wide,
3.1 Definitions—General definitions for packaging and dis-
6.1.10 Ruler, 12 in. (approximately 300 mm),
tribution environments are found in Terminology D 996.
6.1.11 Separation paper, 8.5 by 12 in. (approximately 125
3.2 Definitions of Terms Specific to This Standard:
by 280 mm) bond,
3.2.1 cling—the property of a material’s ability to adhere to
6.1.12 String, 24 in. (approximately 610 mm) nonelastic,
itself.
such as dental floss or fishing line,
3.2.2 stretch wrap material—a material used for over-
6.1.13 Steel rod, approximately 0.25 in. (6 mm) in diameter
wrapping which, when applied under tension, elongates, and
and 10 in. (255 mm) long.
through elastic recovery, conforms to the item(s) packaged.
6.1.14 Cuttingsurface,approximately36by36in.(approxi-
4. Summary of Test Method
mately 900 by 900 mm) plate glass, 0.25 in. (6 mm) thick.
6.2 Preparation of Apparatus:
4.1 This test method is a peel cling procedure. A1 in. (25
6.2.1 Install the load cell on the upper set frame and allow
mm) wide film strip is adhered to a flat film attached to an
15-min warm-up period.
6.2.2 Install the upper lightweight jaw.
This test method is under the jurisdiction of ASTM Committee D10 on
6.2.3 Remove the lower jaw and install the cling attach-
Packaging and is the direct responsibility of Subcommittee D10.25 on Palletizing
ment, using the locking pin to secure.
and Unitizing of Loads.
Current edition approved July 15, 1995. Published September 1995. Originally
published as D 5458 – 94. Last previous edition D 5458 – 94.
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
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. JDC-1-10 Cutter is available from Thwing-Albert Instrument Co., 10960
Withdrawn. Dutton Rd., Philadelphia, PA 19154 or other manufacturers.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D5458–95 (2001)
NOTE 1—1 in. = 25 mm.
FIG. 1 Overall Fixture
6.2.4 Feed the end of the string not fastened to the clamp 8. Test Specimens
through the pulley on the cling attachment and place in the
8.1 The roll to be tested must have at least three outer wraps
center of the upper jaw.
removed just prior to sample selection.
6.2.5 With the clamp resting at the base of the incline
8.2 With the film unwinding from the top of the roll, pull
(which is in position on the base plate), adjust the crosshead, or
about 30 in. (760 mm) of sample film from the roll at a rate of
the amount of string pulled through the grips, or both in
approximately 8 in./s (approximately 200 mm/s). Some films
combination, to achieve a distance of 5 by 7 in. (125 by 180
are sensitive to unwind speed so a consistent rate that does not
mm) between the top of the pulley and the bottom of the grips.
induce appearance variations, such as stripes or bars, is
Tighten the upper jaw. Adjust the crosshead return stop as
important.
necessary.
8.3 Placethefilmbeingsampledontheglasscuttingsurface
6.2.6 Set the testing machine crosshead speed for 5 in. (125
being cautious not to create wrinkles. Mark the machine
mm). (Any chart speed is acceptable.)
direction (MD) of the sample. Do not touch the film test
6.2.7 Zero, balance, and calibrate the tester in accordance
surface.
with the operator’s manual.
8.4 Align the paper sheets under and over the film in three
7. Sampling
locations equidistant across the film. Cut around the outside
edgesofthepaperstoformpaper/film/papersandwiches.Label
7.1 Acceptance sampling shall be in accordance with Prac-
the web location and side of the film that is to be on the outside
tice D 1898.
of a wrapped load; this will be referred to as the “outside”
7.2 Sampling for Other Purposes—The sampling and the
surface and the other side the“ inside” surface.
number of test specimens depends on the purposes of the
testing. Practice E 122 is recommended.Test specimens should 8.5 Using the precision sample cutter, cut a 1 in. (25.4mm)
be taken from several rolls of film, and when possible, from transverse direction (TD) by approximately 7 in. (180 mm)
several production runs of a product. Strong conclusions about machine direction (MD) specimen from each paper/film/paper
a specific property of a film cannot be based on a single roll of sandwich. These will be used with the corresponding 5 by 20
product. in. (125 by 500 mm) samples.
D5458–95 (2001)
NOTE 1—1 in. = 25 mm.
FIG. 2 Incline Surface
8.6 Using the sample template and razor blade, cut three 5 10.4 Grasp the unclamped corners of the film sample and
by 7 in. (125 by 180 mm) TD by MD samples corresponding pull back over the incline face to create a tight, smooth surface
to theTD locations of the 1 by 7 in. (25.4 by 180 mm) s
...
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