ASTM D1709-04

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Designation:D 1709–04
Standard Test Methods for
Impact Resistance of Plastic Film by the Free-Falling Dart
1
Method
This standard is issued under the fixed designation D 1709; 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 (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.
1. Scope* 1.4 The values stated in SI units are to be regarded as
standard. The values stated in parentheses are for information
1.1 These test methods cover the determination of the
only.
energythatcausesplasticfilmtofailunderspecifiedconditions
of impact of a free-falling dart. This energy is expressed in
NOTE 1—Tests on materials that do not break, for any reason, are not
terms of the weight (mass) of the missile falling from a consideredtobevalid.Ithasbeennotedthatcertainmaterialsmaystretch
so far as to bottom out at the base of certain test instruments without
specified height which would result in 50% failure of speci-
actually rupturing. Subcommittee D20.19 is currently considering meth-
mens tested.
odsfortestingthesematerials.AnyoneinterestedinparticipatinginaTask
1.2 Two test methods are described:
Group should contact the Chairman of Subcommittee D20.19 through
1.2.1 Test Method A employs a dart with a
ASTM International Headquarters.
38.10 60.13-mm [1.500 60.005-in.] diameter hemispherical
NOTE 2—This test method is technically equivalent to ISO 7765-1:
head dropped from a height of 0.66 60.01 m [26.0 60.4 in.].
1988, with the exception of a larger tolerance on the drop height in Test
This test method may be used for films whose impact resis- Method B. Also, the ISO method does not allow the alternative testing
technique described in Section 11 of this test method.
tances require masses of about 50 g or less to about 2 kg to
fracture them.
1.5 This standard does not purport to address the safety
1.2.2 Test Method B employs a dart with a
concerns, if any, associated with its use. It is the responsibility
50.80 60.13-mm [2.000 60.005-in.] diameter hemispherical
of the user of this standard to establish appropriate safety and
head dropped from a height of 1.50 60.03 m [60.0+0.25,
health practices and determine the applicability of regulatory
−1.70 in.]. Its range of applicability is from about 0.3 kg to
limitations prior to use.
about 2 kg.
2. Referenced Documents
1.3 Two testing techniques are described:
2
1.3.1 The standard technique is the staircase method. By
2.1 ASTM Standards:
thistechnique,auniformmissileweightincrementisemployed
D374 Test Methods for Thickness of Solid Electrical Insu-
during test and the missile weight is decreased or increased by
lation
the uniform increment after test of each specimen, depending
D618 Practice for Conditioning Plastics for Testing
upon the result (fail or not fail) observed for the specimen.
D883 Terminology Relating to Plastics
1.3.2 The alternative technique provides for testing speci-
D1248 Specification for Polyethylene Plastics Extrusion
mens in successive groups of ten. One missile weight is
Materials for Wire and Cable
employed for each group and missile weight is varied in
D3420 Test Method for Dynamic Ball Burst (Pendulum)
uniform increments from group to group.
Impact Resistance of Plastic Film
1.3.3 The staircase technique and the alternative technique
D4272 Test Method for Total Energy Impact of Plastic
give equivalent results both as to the values of impact failure
Films by Dart Drop
weight which are obtained and as to the precisions with which
E177 Practice for Use of the Terms Precision and Bias in
they are determined.
ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
1
These test methods are under the jurisdiction of ASTM Committee D20 on
2
Plastics and are the direct responsibility of Subcommittee D20.19 on Film and For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Sheeting. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Oct. 1, 2004. Published October 2004. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1959. Last previous edition approved in 2003 as D1709–03. the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D 1709–04
2.2 ISO Standard: initiated energy, while Test Method D4272 is initiation plus
ISO 7765:1988 Plastic Film and Sheeting—
...