Standard Test Method for Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method

SCOPE
1.1 This test method covers the determination of the average force to propagate tearing through a specified length of plastic film or nonrigid sheeting after the tear has been started, using an Elmendorf-type tearing tester. Two specimens are cited, a rectangular type, and one with a constant radius testing length. The latter shall be the preferred or referee specimen.
1.2 Because of (1) difficulties in selecting uniformly identical specimens, (2) the varying degree of orientation in some plastic films, and ( 3) the difficulty found in testing highly extensible or highly oriented materials, or both, the reproducibility of the test results may be variable and, in some cases, not good or misleading. Provisions are made in the test method to compensate for oblique directional tearing which may be found with some materials.
1.3 The values stated in SI units are to be regarded as standard. The values given in brackets are for information only.
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. Specific precautionary statements are given in .Note 1
This standard and ISO 6383-2 are technically equivalent.

General Information

Status
Historical
Publication Date
14-Mar-2006
Technical Committee
Current Stage
Ref Project

Relations

Buy Standard

Standard
ASTM D1922-06 - Standard Test Method for Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method
English language
6 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D1922–06
Standard Test Method for
Propagation Tear Resistance of Plastic Film and Thin
1
Sheeting by Pendulum Method
This standard is issued under the fixed designation D 1922; 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* 2. Referenced Documents
2 3
1.1 This test method covers the determination of the 2.1 ASTM Standards:
averageforcetopropagatetearingthroughaspecifiedlengthof D 374 Test Methods for Thickness of Solid Electrical Insu-
plastic film or nonrigid sheeting after the tear has been started, lation
using an Elmendorf-type tearing tester. Two specimens are D 618 Practice for Conditioning Plastics for Testing
cited, a rectangular type, and one with a constant radius testing D 689 Test Method for Internal Tearing Resistance of Paper
length. The latter shall be the preferred or referee specimen. D 1004 Test Method for Initial Tear Resistance of Plastic
1.2 Because of (1) difficulties in selecting uniformly iden- Film and Sheeting
tical specimens, (2) the varying degree of orientation in some D 4000 Classification System for Specifying Plastic Mate-
plastic films, and (3) the difficulty found in testing highly rials
extensible or highly oriented materials, or both, the reproduc- E 691 Practice for Conducting an Interlaboratory Study to
ibilityofthetestresultsmaybevariableand,insomecases,not Determine the Precision of a Test Method
good or misleading. Provisions are made in the test method to 2.2 ISO Standard:
compensateforobliquedirectionaltearingwhichmaybefound ISO 6383-2 Plastics—Film and Sheeting—Determination
4
with some materials. of Tear Resistance—Part 2 Elmendorf Method
1.3 The values stated in SI units are to be regarded as
3. Summary of Test Method
standard.Thevaluesgiveninbracketsareforinformationonly.
1.4 This standard does not purport to address all of the 3.1 The force in grams required to propagate tearing across
a film or sheeting specimen is measured using a precisely
safety concerns, if any, associated with its use. It is the
calibrated pendulum device. Acting by gravity, the pendulum
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- swings through an arc, tearing the specimen from a precut slit.
The specimen is held on one side by the pendulum and on the
bility of regulatory limitations prior to use. Specific precau-
tionary statements are given in 13.1. other side by a stationary member. The loss in energy by the
pendulum is indicated by a pointer. The scale indication is a
NOTE 1—This standard and ISO 6383-2 are technically equivalent.
function of the force required to tear the specimen.
4. Significance and Use
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
4.1 This test method is of value in ranking relative tearing
and is the direct responsibility of Subcommittee D20.19 on Film and Sheeting.
resistance of various plastic films and thin sheeting of compa-
Current edition approved March 15, 2006. Published April 2006. Originally
approved in 1961. Last previous edition approved in 2005 as D 1922 - 05.
rable thickness. Experience has shown the test to have its best
2
This test method has been adapted from TAPPI Standard Method T 414M-49,
reliability on relatively less extensible films and sheeting.
Internal Tearing Resistance of Paper. In testing certain plastic films, problems of
Variable elongation and oblique tearing effects on the more
reproducibility and interpretation of results are encountered which require special
treatment to make the test method of most value. This test method is revised here extensiblefilmsprecludeitsuseasapreciseproduction-control
specifically for use with plastic film and thin sheeting. For more complete
explanation of certain aspects of the equipment, its calibration and adjustment, refer
3
to TAPPI Standard Method T 414M-49. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
The following additional references may be of interest in connection with this contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
test method: Standards volume information, refer to the standard’s Document Summary page on
Painter,E.V.,Chu,C.C.,andMorgan,H.M.,“TestingTextilesontheElmendorf the ASTM website.
4
Tear Tester,” Textile Research Journal, Vol XX, No. 6, June 1950, pp. 410–417. Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
Elmendorf, A., “Strength Test for Paper,” Paper, Vol 26, April 21, 1920, p. 302. 4th Floor, New York, NY 10036.
*A Summary of Changes section appears at th
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.