ASTM D3787-07(2011)
(Test Method)Standard Test Method for Bursting Strength of Textiles-Constant-Rate-of-Traverse (CRT) Ball Burst Test
Standard Test Method for Bursting Strength of Textiles-Constant-Rate-of-Traverse (CRT) Ball Burst Test
SIGNIFICANCE AND USE
This test method for the determination of ball bursting strength of textiles is being used by the textile industry for the evaluation of a wide variety of fabrics.
Test results obtained using the procedures in Test Method D3787 have not been correlated with actual performance. Test Method D3787 is considered satisfactory for acceptance testing of commercial shipments of textiles fabrics for bursting strength since the method has been used extensively in the trade for acceptance testing. In cases of disagreement arising from differences in values reported by the purchaser and the seller when using Test Method D3787 for acceptance testing, the statistical bias, if any, between the laboratory of the purchaser and the laboratory of the seller should be determined with comparison based on testing specimens randomly drawn from one sample of material of the type being evaluated.
Note 2—The kind force transfer and strength that occur when knitted goods are worn is prevented by clamping them as directed in this test method.
If there are differences of practical significance between reported test results for two (or more) laboratories, comparative tests should be performed to determine if there is a statistical bias between them. The test samples used should be: as homogeneous as possible, drawn from the material from which the disparate test results were obtained, and randomly assigned in equal numbers to the laboratories for testing. Other materials with established test values may be used for this purpose. The test results from the two laboratories should be compared using a statistical test for unpaired data at a probability level chosen prior to the testing series. If a bias is found, either the cause must be determined and corrected or future test results must be adjusted in consideration of known bias.
SCOPE
1.1 This test method describes the measurement for bursting strength with a ball burst strength tester of textiles or garments that exhibit a high degree of ultimate elongation.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as the standard. Within the test, the inch-pound units are shown in parenthesis. The values stated in each system are not exact equivalents; therefore, each system may be used independently of the other. Combining values from the two systems may result in nonconformance within the specification.
Note 1—For the measurement of bursting strength with a hydraulic testing machine, refer to Test Method D3786.
1.3 This standard may involve hazardous materials, operations and equipment. 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: D3787 − 07(Reapproved 2011)
Standard Test Method for
Bursting Strength of Textiles—Constant-Rate-of-Traverse
(CRT) Ball Burst Test
This standard is issued under the fixed designation D3787; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 3.1.1 The following terms are relevant to this standard:
bursting strength, constant–rate-of-traverse (CRT) tensile test-
1.1 Thistestmethoddescribesthemeasurementforbursting
ing machine, fabric, knitted, fabric, nonwoven.
strength with a ball burst strength tester of textiles or garments
that exhibit a high degree of ultimate elongation. 3.2 For all other terminology related to textiles, refer to
Terminology D123.
1.2 The values stated in either SI units or inch-pound units
are to be regarded separately as the standard. Within the test,
4. Summary of Test Method
the inch-pound units are shown in parenthesis. The values
stated in each system are not exact equivalents; therefore, each
4.1 A specimen is securely clamped without tension be-
system may be used independently of the other. Combining
tween grooved, circular plates of the ball burst attachment
values from the two systems may result in nonconformance
secured to the pulling (movable) jaw for the constant-rate-of-
within the specification.
traverse (CRT) testing machine. A force is exerted against the
specimen by a polished, hardened steel ball that is attached to
NOTE 1—For the measurement of bursting strength with a hydraulic
testing machine, refer to Test Method D3786. the pendulum-actuating (fixed) clamp of the machine, until
rupture occurs.
1.3 This standard may involve hazardous materials, opera-
tionsandequipment.Thisstandarddoesnotpurporttoaddress
5. Significance and Use
all of the safety concerns, if any, associated with its use. It is
the responsibility of the user of this standard to establish
5.1 This test method for the determination of ball bursting
appropriate safety and health practices and determine the
strength of textiles is being used by the textile industry for the
applicability of regulatory limitations prior to use.
evaluation of a wide variety of fabrics.
2. Referenced Documents 5.2 Test results obtained using the procedures in Test
Method D3787 have not been correlated with actual perfor-
2.1 ASTM Standards:
mance. Test Method D3787 is considered satisfactory for
D76 Specification for Tensile Testing Machines for Textiles
acceptance testing of commercial shipments of textiles fabrics
D123 Terminology Relating to Textiles
for bursting strength since the method has been used exten-
D1776 Practice for Conditioning and Testing Textiles
sively in the trade for acceptance testing. In cases of disagree-
D3786 Test Method for Bursting Strength of Textile
ment arising from differences in values reported by the
Fabrics—Diaphragm Bursting Strength Tester Method
purchaser and the seller when using Test Method D3787 for
D4850 Terminology Relating to Fabrics and Fabric Test
acceptance testing, the statistical bias, if any, between the
Methods
laboratory of the purchaser and the laboratory of the seller
3. Terminology
should be determined with comparison based on testing speci-
mens randomly drawn from one sample of material of the type
3.1 For all terminology relating to D13.59, Fabric Test
being evaluated.
Methods, General, refer to Terminology D4850.
NOTE 2—The kind force transfer and strength that occur when knitted
This test method is under the jurisdiction ofASTM Committee D13 on Textiles
goods are worn is prevented by clamping them as directed in this test
and is the direct responsibility of D13.59 on Fabric Test Methods, General.
method.
Current edition approved May 1, 2011. Published June 2011. Originally
5.2.1 If there are differences of practical significance be-
approved in 2001. Last previous edition approved in 2007 as D3787–07. DOI:
10.1520/D3787-07R11.
tween reported test results for two (or more) laboratories,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
comparative tests should be performed to determine if there is
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
a statistical bias between them. The test samples used should
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. be: as homogeneous as possible, drawn from the material from
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3787 − 07 (2011)
which the disparate test results were obtained, and randomly 6.2.1 The polished steel ball shall have a diameter of 25.400
assigned in equal numbers to the laboratories for testing. Other 6 0.005 mm (1.0000 6 0.0002 in) and shall be spherical
materials with established test values may be used for this within 0.005 mm (0.0002 in). The ring clamp shall have an
purpose. The test results from the two laboratories should be internal diameter of 44.450 6 0.025 mm (1.750 6 0.001 in).
compared using a statistical test for unpaired data at a
7. Sampling
probability level chosen prior to the testing series. If a bias is
7.1 Lot Sample—Take a lot sample as directed in the
found, either the cause must be determined and corrected or
applicable material specification. In the absence of such a
future test results must be adjusted in consideration of known
specification, randomly select the rolls or pieces of fabric that
bias.
constitute the lot sample using the following schedule:
6. Apparatus
Number of Rolls or Pieces Number of Rolls or Pieces
in Lot, Inclusive in Lot Sample
6.1 Constant-Rate-of-Traverse (CRT) Tensile Testing Ma-
1to3 all
chine (CRT), as specified in Specification D76, with a ball-
4to24 4
25 to 50 5
burst attachment replacing the clamp assembly.
Over 50 10 % or a maximum of 10 of the
rolls or pieces
6.2 Ball-BurstAttachment, consistingofanattachmenthav-
ing a polished steel ball that replaces the fixed clamp of the
7.2 Laboratory Samples—From each roll or piece of fabric
ten
...
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