ASTM D6797-07(2011)
(Test Method)Standard Test Method for Bursting Strength of Fabrics Constant-Rate-of-Extension (CRE) Ball Burst Test
Standard Test Method for Bursting Strength of Fabrics Constant-Rate-of-Extension (CRE) Ball Burst Test
SIGNIFICANCE AND USE
This method is used to determine the force required to rupture textile fabric by forcing a steel ball through the fabric with a constant-rate-of-extension tensile tester.
This is a new method and therefore the history of data is very small, however the agreement of within- laboratory data suggest this method may be considered for acceptance testing of commercial shipments with caution.
If there are differences of practical significance between reported test results for two laboratories (or more), comparative test should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, samples used for such comparative test should be as homogeneous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing, and randomly assigned in equal numbers to each laboratory. Other fabrics with established test values may also be used for these comparative tests. The test results from the laboratories involved should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If bias is found, either its cause must be found and corrected, or future test results for that fabric must be adjusted in consideration of the known bias.
SCOPE
1.1 This test method describes the measurement for bursting strength of woven and knitted textiles taken from rolls of fabric or fabric taken from garments.
Note 1—For the measurement of bursting strength with a hydraulic or pneumatic machine, refer to Test Method D3786. For the measurement of the bursting strength by means of a ball burst mechanism, refer to Test Method D3787
1.2 The values stated in either SI units or U.S. customary units are to be regarded as standard, but must be used independently of each other. The U.S. customary units may be approximate.
1.3 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.
General Information
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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: D6797 − 07(Reapproved 2011)
Standard Test Method for
Bursting Strength of Fabrics Constant-Rate-of-Extension
(CRE) Ball Burst Test
This standard is issued under the fixed designation D6797; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D4850Terminology Relating to Fabrics and Fabric Test
Methods
1.1 Thistestmethoddescribesthemeasurementforbursting
strengthofwovenandknittedtextilestakenfromrollsoffabric
3. Terminology
or fabric taken from garments.
NOTE 1—For the measurement of bursting strength with a hydraulic or
3.1 For all terminology related to D13.59, Fabric Test
pneumatic machine, refer toTest Method D3786. For the measurement of
Methods, General, see Terminology D4850.
the bursting strength by means of a ball burst mechanism, refer to Test
3.1.1 The following terms are relevant to this standard:
Method D3787
bursting strength, constant–rate-of-traverse (CRT) tensile test-
1.2 The values stated in either SI units or U.S. customary
ing machine, fabric.
units are to be regarded as standard, but must be used
3.2 FordefinitionsofallothertextiletermsseeTerminology
independently of each other. The U.S. customary units may be
D123.
approximate.
1.3 This standard does not purport to address all of the
4. Summary of Test Method
safety concerns, if any, associated with its use. It is the
4.1 Setupthetensiletesterforperformingtheballbursttest
responsibility of the user of this standard to establish appro-
in accordance with the manufacture’s instructions.Aspecimen
priate safety and health practices and determine the applica-
of the fabric is securely clamped to the CRE machine without
bility of regulatory limitations prior to use.
tension to the ball burst attachment.Aforce is exerted against
2. Referenced Documents the specimen by a polished, hardened steel ball until rupture
occurs.
2.1 ASTM Standards:
D123Terminology Relating to Textiles
5. Significance and Use
D1776Practice for Conditioning and Testing Textiles
D2904Practice for Interlaboratory Testing of a Textile Test
5.1 This method is used to determine the force required to
Method that Produces Normally Distributed Data (With-
rupture textile fabric by forcing a steel ball through the fabric
drawn 2008)
with a constant-rate-of-extension tensile tester.
D2906Practice for Statements on Precision and Bias for
5.2 Thisisanewmethodandthereforethehistoryofdatais
Textiles (Withdrawn 2008)
very small, however the agreement of within- laboratory data
D3786 Test Method for Bursting Strength of Textile
suggest this method may be considered for acceptance testing
Fabrics—Diaphragm Bursting Strength Tester Method
of commercial shipments with caution.
D3787Test Method for Bursting Strength of Textiles—
5.2.1 If there are differences of practical significance be-
Constant-Rate-of-Traverse (CRT) Ball Burst Test
tween reported test results for two laboratories (or more),
comparativetestshouldbeperformedtodetermineifthereisa
statistical bias between them, using competent statistical assis-
ThistestmethodisunderthejurisdictionofASTMCommitteeD13onTextiles
tance.As a minimum, samples used for such comparative test
and is the direct responsibility of Subcommittee D13.59 on Fabric Test Methods,
General.
should be as homogeneous as possible, drawn from the same
Current edition approved May 1, 2011. Published August 2007. Originally
lot of material as the samples that resulted in disparate results
approved in 2002. Last previous edition approved in 2002 as D6797–02. DOI:
during initial testing, and randomly assigned in equal numbers
10.1520/D6797-07R11.
to each laboratory. Other fabrics with established test values
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
may also be used for these comparative tests. The test results
Standards volume information, refer to the standard’s Document Summary page on
from the laboratories involved should be compared using a
the ASTM website.
statistical test for unpaired data, at a probability level chosen
The last approved version of this historical standard is referenced on
www.astm.org. prior to the testing series. If bias is found, either its cause must
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6797 − 07 (2011)
be found and corrected, or future test results for that fabric 7.4.2 Garmentsmaynotrequirecuttingiftheequipmenthas
must be adjusted in consideration of the known bias. ample room to clamp the garment in the apparatus. Five
determinations should be made on each garment.
6. Apparatus
8. Conditioning
6.1 Tensile Testing Machine ,oftheconstant-rate-of-exten-
8.1 Bring the specimens (or laboratory samples) from the
sion (CRE) type.
prevailing atmosphere to moisture equilibrium for testing
6.2 Ball-Burst Attachment , consisting of a clamping
textiles in the standard atmosphere for testing as prescribed in
mechanism to hold the test specimen and a steel ball attached
Practice D1776.
to the moveable member of the tensile tester.
6.2.1 Thepolishedsteelballshallhaveadiameterof25.400
9. Procedure
6 0.005 mm (1.0000 6 0.0002 in.) and shall be spherical
9.1 Unless otherwise specified, make all tests on samples
within 0.005 mm (0.0002 in.). The ring clamp shall have an
conditioned in the standard atmosphere for testing as specified
internal diameter of 44.450 6 0.025 mm (1.750 6 0.001 in.).
in 8.1.
9.2 Place the specimen without tension in the ring clamp
7. Sampling, Selection, and Number of Specimens
and fasten securely. Start the CRE machine and maintain a
7.1 Primary Sampling Unit—Consider rolls, bolts or pieces
speed of 305 6 13 mm/min (12 6 0.5 in./min). Continue that
offabric,orcartonsoffabriccomponentsoffabricatedsystems
speed until the specimen bursts. Record to the nearest 5 N (1.0
such as garments to be the primary sampling unit, as appli-
lbf) the ball-bursting strength of the specimen.
cable.
10. Report
7.2 Laboratory Sampling Unit—As a laboratory sampling
unittakefromtheprimarysamplingunitatleastonefull-width
10.1 State that the specimens were tested as directed inTest
piece of fabric that is1m(1yd)in length along the selvage
Method D6797. Describe the material or product
...
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