ASTM D2923-01
(Test Method)Standard Test Method for Rigidity of Polyolefin Film and Sheeting
Standard Test Method for Rigidity of Polyolefin Film and Sheeting
SCOPE
1.1 This test method describes two procedures for measuring the rigidity of polyolefin film and sheeting.
1.2 Procedure A prescribes a procedure using high-voltage static eliminators and the use of TFE-fluorocarbon -coated plates to overcome the spurious effects of static electricity and friction.
1.3 Procedure B prescribes the use of a fine powder on uncoated plates to achieve a similar effect.
Note 1—Although the two procedures are designed to achieve similar effect, they may not achieve the same results.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 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. /p>
Note 2—There is no similar or equivalent ISO standard.
General Information
Relations
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D 2923 – 01
Standard Test Method for
1
Rigidity of Polyolefin Film and Sheeting
This standard is issued under the fixed designation D 2923; 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* 3.1.1 rigidity—that combination of thickness and inherent
stiffness of a polyolefin film or sheet which resists flexure.
1.1 This test method describes two procedures for measur-
ing the rigidity of polyolefin film and sheeting.
4. Summary of Test Method
1.2 Procedure A prescribes a procedure using high-voltage
2 4.1 The resistance to flexure of the sample is measured by a
static eliminators and the use of TFE-fluorocarbon -coated
strain gage affixed to the end of a beam, the opposite end of
plates to overcome the spurious effects of static electricity and
which flexes the sample by forcing it into a groove or slot in a
friction.
horizontal platform upon which the sample rests.An indicating
1.3 Procedure B prescribes the use of a fine powder on
microammeter, wired to the strain gage, is calibrated in grams
uncoated plates to achieve a similar effect.
of load sensed by the strain gage. The rigidity is read directly
NOTE 1—Although the two procedures are designed to achieve similar
from the meter and expressed as grams per centimetre of
effect, they may not achieve the same results.
sample width.
1.4 The values stated in SI units are to be regarded as the
5. Significance and Use
standard. The values given in parentheses are for information
only.
5.1 The rigidity of a polyolefin web can affect its machin-
1.5 This standard does not purport to address all of the ability, particularly on those packaging machines where a cut
safety concerns, if any, associated with its use. It is the
portionofawebisrequiredtoremainflatmomentarilywithout
responsibility of the user of this standard to establish appro- being supported on all sides.
priate safety and health practices and determine the applica-
5.2 Rigidity is not a simple property since it depends on two
bility of regulatory limitations prior to use. other properties of the sample: the thickness (gage), and the
stiffness which is an inherent property of the material of which
NOTE 2—There is no similar or equivalent ISO standard.
the film or sheet is made. The combined effect of these two
factorsistherigiditythatinfluencesperformanceonconverting
2. Referenced Documents
3 machines.
2.1 ASTM Standards:
D 618 Practice for Conditioning Plastics for Testing
6. Interferences
4
D 1898 Practice for Sampling of Plastics
6.1 Static electricity has considerable influence on the
measured rigidity. It contributes to poor precision and accu-
3. Terminology
racy, frequently giving results biased toward the high side.
3.1 Definitions:
6.2 To a lesser extent, precision and accuracy are adversely
affected by the frictional properties of the sample, particularly
1
when the coefficient of friction is close to 1.
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
and is the direct responsibility of Subcommittee D20.19 on Film and Sheeting.
6.3 The interference caused by the level of static electricity
Current edition approved August 10, 2001. Published October 2001. Originally
and friction of the specimen is overcome in Procedure A by
published as D 2923 – 70. Last previous edition D 2923 – 95.
2 electrically destaticizing the sample and using TFE-
This test method is based on the use of Teflont, a registered trademark of E. I.
fluorocarbon-coated plates and in Procedure B by dusting the
duPont de Nemours & Co.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
platform with a fine powder at the start of the test.
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
7. Apparatus
the ASTM website.
4
Withdrawn. 7.1 Procedure A:
*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.
1
---------------------- Page: 1 ----------------------
D2923–01
NOTE 3—Readings in excess of the maximum meter value require use
7.1.1 Handle-O-Meter, or equivalent, with TFE-
of an augmenting weight in accordance with the manufacturer’s instruc-
fluorocarbon-coated plates complete with calibrating and aug-
tions. The proper reading with a 40-g augmenting weight is 40 g plus the
5
menting weights.
maximum meter value.
7.1.2 Cutting Board or Template suitable for preparing 203
NOTE 4—If the total reading is in excess of the maximum value plu
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.