ASTM International - ASTM D1709-15a

Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method

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Organization: ASTM International
Publication Date: 15 May 2015
Status: historical
Page Count: 9
ICS Code (Films and sheets): 83.140.10
significance And Use:

4.1 Test Methods A and B are used to establish the weight of the dart when 50 % of the specimens fail under the conditions specified. Data obtained by one test method cannot be compared... View More

scope:

1.1 These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the weight (mass) of the missile falling from a specified height which would result in 50 % failure of specimens tested.

1.2 Two test methods are described:

1.2.1 Test Method A employs a dart with a 38.10 ± 0.13-mm (1.500 ± 0.005-in.) diameter hemispherical head dropped from a height of 0.66 ± 0.01 m (26.0 ± 0.4 in.). This test method can be used for films whose impact resistances require masses of about 50 g or less to about 6 kg to fracture them.

1.2.2 Test Method B employs a dart with a 50.80 ± 0.13-mm (2.000 ± 0.005-in.) diameter hemispherical head dropped from a height of 1.52 ± 0.03 m (60.0 + 0.25, −1.70 in.). Its range of applicability is from about 0.3 kg to about 6 kg.

1.3 Two testing techniques are described:

1.3.1 The standard technique is the staircase method. By this technique, the missile weight employed during the test is decreased or increased by uniform increments after the testing of each specimen, depending upon the result (fail or not fail) observed for the specimen.

1.3.2 The alternative technique provides for testing specimens in successive groups of ten. One missile weight is employed for each group and the missile weight is varied in uniform increments from group to group.

1.3.3 The staircase technique and the alternative technique give equivalent results both as to the values of impact failure weight which are obtained and as to the precisions with which they are determined.

1.4 The values stated in SI units are to be regarded as standard. The values stated in parentheses are for information only.

Note 1: Tests on materials that do not break, for any reason, are not considered to be valid. It has been noted that certain materials may stretch so far as to bottom out at the base of certain test instruments without actually rupturing. Subcommittee D20.19 is currently considering methods for testing these materials. Anyone interested in participating in a Task Group should contact the Chairman of Subcommittee D20.19 through ASTM International Headquarters.

1.5 This standard does not purport to address 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.

Note 2: Film has been arbitrarily defined as sheeting having nominal thickness not greater than 0.25 mm (0.010 in.).

Note 3: This test method is technically equivalent to ISO 7765-1: 1988, with the exception of a larger tolerance on the drop height in Test Method B, smaller tolerances on the dart diameters for Test Methods A and B, and the requirement for a vented dart well in 5.1.1. Also, the ISO method does not allow the alternative testing technique described in Section 11 of this test method.

Document History

May 1, 2016
Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method
1.1 These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the...
May 1, 2016
Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method
1.1 These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the...
April 15, 2016
Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method
1.1 These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the...
ASTM D1709-15a
May 15, 2015
Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method
1.1 These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the...
January 1, 2015
Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method
1.1 These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the...
May 1, 2009
Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method
1.1 These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the...
November 1, 2008
Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method
1.1 These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the...
October 1, 2004
Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method
1.1 These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the...
March 10, 2003
Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method
1.1 These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the...
August 10, 2001
Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method
1.1 These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the...
August 10, 2001
Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method
1.1 These test methods cover the determination of the energy that causes plastic film to fail under specified conditions of impact of a free-falling dart. This energy is expressed in terms of the...
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