Standard Test Method for Evaluation of Mechanical Handling of Unitized Loads Secured with Stretch Wrap Films

SCOPE
1.1 This test method covers evaluation and comparison of the ability of unitizing films to survive various methods of mechanical handling.
1.2 The test method described is applicable to common means of material handling, including the following: forklift, push/pull, clamp truck, crane, and spade lift-type handling systems.
1.3 The test levels may be varied to reflect known levels of intensity accurately for the specific unit load under testing.
1.4 The methodology of performing the mechanical handling tests is described in detail in Methods D1083. This test method will describe only sample preparation and evaluation in the special case of evaluating the performance of stretch film for load unitizing.
1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 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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Status
Historical
Publication Date
09-Apr-1998
Technical Committee
Current Stage
Ref Project

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Designation: D 5331 – 98
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Evaluation of Mechanical Handling of Unitized Loads
1
Secured with Stretch Wrap Films
This standard is issued under the fixed designation D 5331; 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 3.2 Definitions of Terms Specific to This Standard:
3.2.1 large shipping case or crate—for the purposes of this
1.1 This test method covers evaluation and comparison of
test method, a shipping container constructed of any material,
the ability of unitizing films to survive various methods of
and of such size and weight, to require mechanical handling. A
mechanical handling.
case or crate of this type may weigh from 100 lb (45 kg) to
1.2 The test method described is applicable to common
many tons and measure proportionally. The case or crate may
means of material handling, including the following: forklift,
be secured to or carried by a base or pallet. Frame members
push/pull, clamp truck, crane, and spade lift-type handling
3
may be provided for rigidity throughout the container.
systems.
3.2.2 spade life attachment—a lift truck attachment used for
1.3 The test levels may be varied to reflect known levels of
top handling products packaged in interlocking flange cartons
intensity accurately for the specific unit load under testing.
(IFC) or folded cap or folded flap style cartons.
1.4 The methodology of performing the mechanical han-
3.2.3 unitized load—for the purposes of this test method,
dling tests is described in detail in Test Methods D 1083. This
consisting of a number of packages (two or more) wrapped or
test method will describe only sample preparation and evalu-
banded together as a shipping unit. When unitized, these
ation in the special case of evaluating the performance of
packages typically weigh more than 100 lb (45 kg). The
stretch film for load unitizing.
unitized method may be shrink wrapping, banding, strapping,
1.5 The values stated in inch-pound units are to be regarded
taping, or gluing. A base consisting of a pallet or slip sheet may
as the standard. The values given in parentheses are for
or may not be used.
information only.
1.6 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 This test method is intended for use primarily as a
responsibility of the user of this standard to establish appro-
means of comparing the performance of unitizing films. It can
priate safety and health practices and determine the applica-
also be used to compare the effectiveness of different wrap
bility of regulatory limitations prior to use.
cycles with the same wrapping materials. No direct correlation
2. Referenced Documents between these test results and actual field performance has
been established.
2.1 ASTM Standards:
4.2 This test method simulates mechanical handling antici-
D 1083 Test Methods for Mechanical Handling of Unitized
2
pated during all distribution phases.
Loads and Large Shipping Cases and Crates
4.3 This test method leaves open to the discretion of the user
D 4169 Practice for Performance Testing of Shipping Con-
2 the establishment of test levels and numbers of cycles consti-
tainers and Systems
tuting the test, so that the user might tailor the test to simulate
D 6055 Test Methods for Mechanical Handling of Unitized
2 a particular distribution environment. The section on mechani-
Loads and Large Shipping Cases and Crates
cal handling over 100 pounds (45 kg) in Practice D 4169 may
D 6179 Test Methods for Rough Handling of Unitized
2 provide some guidance in this regard.
Loads and Large Shipping Cases and Crates
5. Apparatus
3. Terminology
5.1 Load Wrapping Apparatus—A machine or apparatus to
3.1 Definitions—General definitions for packaging and dis-
wrap the test load. The wrap application method is preferably
tribution environments are found in Terminology D 996.
as near as possible to that used in an actual production situation
(stretch wrapper or manual wrapping unit).
1
This test method is under the jurisdiction of ASTM Committee D-10 on
5.2 Mechanical Handling Apparatus—Refer to Section 5 of
Packaging and is the direct responsibility of Subcommittee D10.25 on Palletizing
and Unitizing of Loads.
Current edition approved April 10, 1998. Published February 1999. Originally
published as D 5331 – 92. Last previous edition D 5331 – 95.
2 3
Annual Book of ASTM Standards, Vol 15.09. Annual Book of ASTM Standards, Vol 14.02.
1

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D 5331
Test Methods D 6055 and Test Methods D 6179 for a complete 8.4.4 Top dw
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