Standard Test Method for Brittleness Temperature of Plastic Sheeting by Impact

SIGNIFICANCE AND USE
Data obtained by this test method may be used to predict the behavior of plastic sheeting at low temperatures only if the conditions of deformation are similar to those specified in this test method. This test method is useful for specification testing and for comparative purposes, but does not necessarily measure the lowest temperature at which the plastic sheeting may be used.
It has been demonstrated that on calendered sheeting the brittleness temperature is sensitive to the direction of fold. It has also been demonstrated that the brittleness temperature is sensitive to the direction of sampling. Therefore, it is imperative that the procedure for taking specimens and folding be followed explicitly.
SCOPE
1.1 This test method covers the determination of that temperature at which plastic sheeting 1.00 mm (0.040 in.) or less in thickness exhibits a brittle failure under specified impact conditions.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
Note 1—This test method was developed jointly with the Society of the Plastics Industry, primarily for use with plasticized vinyl sheetings. Its applicability to other plastic sheetings must be verified by the user.
1.3 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. Specific precautionary statements are given in Note 4.
Note 3—This test method is similar to ISO 8570-1991 in title only. The technical content is significantly different.

General Information

Status
Historical
Publication Date
09-Mar-2002
Technical Committee
Drafting Committee
Current Stage
Ref Project

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ASTM D1790-02 - Standard Test Method for Brittleness Temperature of Plastic Sheeting by Impact
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D1790–02
Standard Test Method for
1
Brittleness Temperature of Plastic Sheeting by Impact
This standard is issued under the fixed designation D 1790; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* ably pass 95 % of the time when a stated minimum number are
tested by this test method. The 80 %-passing value may be
1.1 This test method covers the determination of that
determined by plotting the data on probability graph paper, as
temperature at which plastic sheeting 1.00 mm (0.040 in.) or
described in 9.1.
lessinthicknessexhibitsabrittlefailureunderspecifiedimpact
3.1.2 General—Definitions of terms applying to this test
conditions.
method appear in Terminology D 883.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
4. Significance and Use
only.
4.1 Dataobtainedbythistestmethodmaybeusedtopredict
NOTE 1—This test method was developed jointly with the Society of
the behavior of plastic sheeting at low temperatures only if the
the Plastics Industry, primarily for use with plasticized vinyl sheetings. Its
conditions of deformation are similar to those specified in this
applicability to other plastic sheetings must be verified by the user.
test method. This test method is useful for specification testing
1.3 This standard does not purport to address the safety
and for comparative purposes, but does not necessarily mea-
concerns, if any, associated with its use. It is the responsibility
sure the lowest temperature at which the plastic sheeting may
of the user of this standard to establish appropriate safety and
be used.
health practices and determine the applicability of regulatory
4.2 It has been demonstrated that on calendered sheeting the
limitations prior to use. Specific precautionary statements are
brittleness temperature is sensitive to the direction of fold. It
given in Note 4.
has also been demonstrated that the brittleness temperature is
sensitive to the direction of sampling. Therefore, it is impera-
NOTE 2—ThistestmethodissimilartoISO 8570-1991intitleonly.The
tive that the procedure for taking specimens and folding be
technical content is significantly different.
followed explicitly.
2. Referenced Documents
5. Apparatus
2.1 ASTM Standards:
2
D 618 Practice for Conditioning Plastics for Testing 5.1 Cold Conditioning Chamber, at least 450 by 450 by 450
2
mm (18 by 18 by 18 in.). Means (automatic or manual) shall be
D 883 Terminology Relating to Plastics
E 691 Practice for Conducting an Interlaboratory Study to provided for controlling the temperature of the chamber to
3
within 62°C of the desired value.
Determine the Precision of a Test Method
5
2.2 ISO Standard: 5.2 Impact Tester shown in Fig. 1 shall be constructed of
cold-rolled steel except for the bolts, screws, and rubber
ISO 8570-1991 Plastics—Film and Sheeting—
4
Determination of Cold-Crack Temperature stopper. All structural parts (that is, base, anvil, arm, arm
supports, and shaft) may be chromium plated. The arm,
3. Terminology
includingtherubberstopperandbolt,shallweigh3.09kg 628
3.1 Definitions: g(6lb13 6 1 oz).
1
3.1.1 brittleness temperature, T —that temperature, de- 5.3 Die, 50.8 6 0.4 mm by 146.1 6 0.4 mm (2 6 ⁄64 in. by
b
3 1
rived statistically, where 80 % of the specimens would prob- 5 ⁄4 6 ⁄64 in.) to cut the test specimens from the sample.
5.4 Stapler, desk-type, with a stop mounted on the base
1
1
exactly 12.7 mm ( ⁄2 in.) back of the center of the groover that
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
and is the direct responsibility of Subcommittee D20.30 on Thermal Properties.
turns the staple.
Current edition approved March 10, 2002. Published May 2002. Originally
5.5 Index Card Stock, 50 by 127 mm (2 by 5 in.).
published as D 1790 – 60 T. Last previous edition D 1790 – 99.
2
Annual Book of ASTM Standards, Vol 08.01.
3
Annual Book of ASTM Standards, Vol 14.02.
4 5
Available from American National Standards Institute, 25 W. 43rd St., 4th A suitable tester is available from the United States Testing Co., 1415 Park
Floor, New York, NY 10036. Ave., Hoboken, NJ.
*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

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D1790–02
Metric Equivalents
1 1 7 1 1 1
in. ⁄8 ⁄4 ⁄16 ⁄2 1 2 ⁄2 3 4 ⁄2 12 14
mm 3.2 6.4 11.1 12.7 25.4 64 76 114 305 356
FIG.
...

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