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ASTM D5419-95(2003)

(Test Method)

Standard Test Method for Environmental Stress Crack Resistance (ESCR) of Threaded Plastic Closures

Standard Test Method for Environmental Stress Crack Resistance (ESCR) of Threaded Plastic Closures

SIGNIFICANCE AND USE
This test method compares closures for ESCR. Suitable variables are: closure materials, closure designs, processes, applied torque, and stress-crack agents.
Results can be used for estimating shelf life of closures in terms of ESCR. This requires that the user has calibrated failure time in this test to failure time in the field for actual packaging systems.
SCOPE
1.1 This test method determines the susceptibility of threaded plastic closures to failure due to environmental stress cracking (ESC).
1.2 Threaded plastic closures in use may contact agents that appreciably reduce the stress at which cracks form. Examples of such agents are: soaps, detergents, oils, and liquid bleaches.
1.3 Other major factors that influence environmental stress crack resistance (ESCR) of threaded plastic closures are the closure material(s), closure design, molded-in stress, and applied stress.
1.4 This procedure applies particularly to closures made from plastics based on polypropylene (PP) or polystyrene (PS). It may also apply to other polymers.
1.5 The values stated in SI units are to be regarded as the standard.
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 Section 8 and Note 2.

General Information

Status
Historical
Publication Date
09-Jul-2003
ICS
83.080.20 - Thermoplastic materials
Technical Committee
D20 - Plastics
Drafting Committee
D20.19 - Film, Sheeting, and Molded Products
Current Stage
Ref Project

Relations

Replaces
ASTM D5419-95 - Standard Test Method for Environmental Stress Crack Resistance (ESCR) of Threaded Plastic Closures
Effective Date
10-Jul-2003
Replaced By
ASTM D5419-09 - Standard Test Method for Environmental Stress Crack Resistance (ESCR) of Threaded Plastic Closures
Effective Date
15-Nov-2009

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ASTM D5419-95(2003) - Standard Test Method for Environmental Stress Crack Resistance (ESCR) of Threaded Plastic ClosuresASTM D5419-95(2003) - Standard Test Method for Environmental Stress Crack Resistance (ESCR) of Threaded Plastic Closures
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ASTM D5419-95(2003) - Standard Test Method for Environmental Stress Crack Resistance (ESCR) of Threaded Plastic Closures
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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:D5419–95 (Reapproved 2003)
Standard Test Method for
Environmental Stress Crack Resistance (ESCR) of Threaded
1
Plastic Closures
This standard is issued under the fixed designation D5419; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope D3198 Test Method forApplication and RemovalTorque of
Threaded or Lug-Style Closures
1.1 This test method determines the susceptibility of
E145 Specification for Gravity-Convection and Forced-
threaded plastic closures to failure due to environmental stress
Ventilation Ovens
cracking (ESC).
E691 Practice for Conducting an Interlaboratory Study to
1.2 Threaded plastic closures in use may contact agents that
Determine the Precision of a Test Method
appreciably reduce the stress at which cracks form. Examples
of such agents are: soaps, detergents, oils, and liquid bleaches.
3. Terminology
1.3 Other major factors that influence environmental stress
3.1 Definitions—Except for those terms below, see Termi-
crack resistance (ESCR) of threaded plastic closures are the
nologies D883 and D1600.
closure material(s), closure design, molded-in stress, and
3.2 Definitions of Terms Specific to This Standard:
applied stress.
3.2.1 assembly—closure applied to a bottle finish.
1.4 This procedure applies particularly to closures made
3.2.2 failure—during this test, any visible crack.
from plastics based on polypropylene (PP) or polystyrene (PS).
3.2.2.1 Discussion—A crack does not have to penetrate the
It may also apply to other polymers.
closure wall to be considered a failure.
1.5 The values stated in SI units are to be regarded as the
3.2.3 finish—fixturerepresentingthethreadedportionofthe
standard.
bottle.
1.6 This standard does not purport to address all of the
3.2.4 threaded closure—part applied to seal bottle as speci-
safety concerns, if any, associated with its use. It is the
fied in Specification D2911.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Summary of Test Method
bility of regulatory limitations prior to use. Specific precau-
4.1 This test method consists of applying closures at a
tionary statements are given in Section 8 and Note 2.
specified application torque to rigid finishes (of polysulfone or
NOTE 1—There are no ISO standards covering the primary subject of
other appropriate resin), immersing the assembly in a potential
this test method.
stress-cracking agent, and observing and reporting time-to-
failure.
2. Referenced Documents
2
2.1 ASTM Standards:
5. Significance and Use
D618 Practice for Conditioning Plastics for Testing
5.1 This test method compares closures for ESCR. Suitable
D883 Terminology Relating to Plastics
variables are: closure materials, closure designs, processes,
D1600 Terminology for Abbreviated Terms Relating to
applied torque, and stress-crack agents.
Plastics
5.2 Results can be used for estimating shelf life of closures
D2911 Specification for Dimensions and Tolerances for
in terms of ESCR. This requires that the user has calibrated
Plastic Bottles
failure time in this test to failure time in the field for actual
packaging systems.
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics 6. Apparatus
and is the direct responsibility of Subcommittee D20.19 on Film and Sheeting.
6.1 Wide-Mount Gallon Jars, glass, PET, or other suitable
Current edition approved July 10, 2003. Published September 2003. Originally
material. Must have lined closures to ensure air-tight seal. Use
approved in 1993. Last previous edition approved in 1995 as D5419 – 95. DOI:
10.1520/D5419-95R03.
one jar per sample.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.2 Circulating-Air Oven, capable of maintaining a tem-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
perature of 50 6 1°C (critical in this application). See
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Specification E145 for a procedure for confirming satisfactory
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D5419–95 (2003)
NOTE 1—Tolerances for Dimensions T, E, and S shall be in accordance with Specification D2911.
FIG. 1 Typical Fixture
uniformity of temperature within the oven.There is no air-flow 8. Hazards
requirement in this application. An environmental room with
8.1 Always wear protective equipment appropriate to the
these properties is also suitable.
product haz
...

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