Standard Test Method for Snagging Resistance of Fabrics (Mace)

SIGNIFICANCE AND USE
5.1 This test method is not considered satisfactory for acceptance testing of commercial shipments of fabrics because the between-laboratory precision of the test method is poor (see 15.1).  
5.1.1 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 significant difference between them, using competent statistical assistance. As a minimum, use the samples for such a comparative test that are 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. 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 testing for that material must be adjusted in consideration of the statistically significant differences.  
5.2 This test method may be used for quality control testing of fabrics during manufacturing and product comparisons of different fabrics by manufacturers, retailers, and users. This test method may also be used by researchers to examine the effect of new fibers, yarns, fabric constructions, and finishes on the snagging resistance of fabrics.  
5.3 This test method may be used to test the snagging resistance of most apparel and home furnishings fabrics. However, a different test method may be needed for different types of fabrics and different end-uses (such as towels, pants, and upholstery) (see 5.3.1).  
5.3.1 Some fabrics that may not be suitable for this test method are described in 1.2. Many open construction fabrics can be tested for snagging resistance using AATCC Test Method 65. The snagging resistance of many pile floor coverings can be tested by Test Method D1335. Test Method D5362 (Bean Bag) ma...
SCOPE
1.1 This test method determines the snagging resistance of a fabric.  
1.2 Studies of fabric snagging have shown that this test method is suitable for a range of woven and knitted fabrics made from textured or untextured filament yarns or spun yarns or combinations of these yarns.2,3 This test method is not suitable for (1) open construction fabrics (such as a net) because the points on the mace will snag the felt pad rather than the specimen, (2) very heavy or very stiff fabrics that cannot be made to fit tightly on the drum and felt pad, and (3) tufted or nonwoven fabrics because the apparatus is designed for woven and knitted fabrics.  
1.3 If after using this test method it is found to be too severe for your fabrics, an alternative method can be used, such as BS 8479 Textiles: Method for Determination of the Propensity of Fabrics to Snagging and Related Surface Defects - Rotating Chamber Method.  
1.4 The values stated in either SI units or in other units shall be regarded separately as the standard. The values stated in each system may not be exact equivalents; therefore, each system must be used independently of the other, without combining values in any way. In case of referee decisions, the SI units will prevail.  
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. Specific precautionary statements are given in Section 7.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Publication Date
14-Jul-2017
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ASTM D3939/D3939M-13(2017) - Standard Test Method for Snagging Resistance of Fabrics (Mace)
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D3939/D3939M − 13 (Reapproved 2017)
Standard Test Method for
1
Snagging Resistance of Fabrics (Mace)
This standard is issued under the fixed designation D3939/D3939M; 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 Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.1 Thistestmethoddeterminesthesnaggingresistanceofa
Barriers to Trade (TBT) Committee.
fabric.
1.2 Studies of fabric snagging have shown that this test
2. Referenced Documents
method is suitable for a range of woven and knitted fabrics
4
2.1 ASTM Standards:
made from textured or untextured filament yarns or spun yarns
2,3 D123 Terminology Relating to Textiles
or combinations of these yarns. This test method is not
D1335 Test Method for Tuft Bind of Pile Yarn Floor
suitable for (1) open construction fabrics (such as a net)
Coverings
because the points on the mace will snag the felt pad rather
D1776 Practice for Conditioning and Testing Textiles
than the specimen, (2) very heavy or very stiff fabrics that
D2724 Test Methods for Bonded, Fused, and Laminated
cannot be made to fit tightly on the drum and felt pad, and (3)
Apparel Fabrics
tufted or nonwoven fabrics because the apparatus is designed
D3136 Terminology Relating to Care Labeling for Apparel,
for woven and knitted fabrics.
Textile, Home Furnishing, and Leather Products
1.3 If after using this test method it is found to be too severe
D4467 Practice for Interlaboratory Testing of a Textile Test
for your fabrics, an alternative method can be used, such as BS
Method That Produces Non-Normally Distributed Data
5
8479 Textiles: Method for Determination of the Propensity of
(Withdrawn 2010)
Fabrics to Snagging and Related Surface Defects - Rotating
D4850 Terminology Relating to Fabrics and Fabric Test
Chamber Method.
Methods
D5362 Test Method for Snagging Resistance of Fabrics
1.4 The values stated in either SI units or in other units shall
(Bean Bag)
be regarded separately as the standard. The values stated in
6
each system may not be exact equivalents; therefore, each
2.2 AATCC Standards:
system must be used independently of the other, without
65 Test Method for Snag Resistance of Women’s Nylon
combining values in any way. In case of referee decisions, the
Hosiery (see Note 1)
SI units will prevail.
135 Test Method for Dimensional Changes in Automatic
1.5 This standard does not purport to address all of the Home Laundering of Woven and Knit Fabrics
safety concerns, if any, associated with its use. It is the
NOTE 1—In 1988, theAATCC voted to withdraw this test method from
responsibility of the user of this standard to establish appro-
its technical manual; however, the ASTM task group on fabric snagging
priate safety and health practices and determine the applica-
decided it should be listed as an alternative for testing open construction
fabrics.
bility of regulatory limitations prior to use. Specific precau-
tionary statements are given in Section 7.
3. Terminology
1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3.1 For definitions of textile terms used in this test method:
ization established in the Decision on Principles for the
(color contrast, in textiles; distortion, in fabrics; protrusion, in
1
This test method is under the jurisdiction ofASTM Committee D13 on Textiles
4
and is the direct responsibility of Subcommittee D13.59 on Fabric Test Methods, For referenced ASTM standards, visit the ASTM website, www.astm.org, or
General. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved July 15, 2017. Published August 2017. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1980. Last previous edition approved in 2013 as D3939 – 13. DOI: the ASTM website.
5
10.1520/D3939_D3939M-13R17. The last approved version of this historical standard is referenced on
2
Finnigan,J.A., “Laboratory Prediction of the Tendency of a Fabric to Snag www.astm.org.
6
During Wear,” Textile Institute and Industry, Vol 10 , No. 6, 1972, pp. 164–167. Available from American Association of Textile Chemists and Colorists
3
Leung, P., and Hershkowitz, R., “Snag- and Fuzz-Resistant Double Knits via (AATCC), P.O. Box 12215, Research Triangle Park, NC 27709, http://
Fabric Construction,” Textile Research Journal, V
...

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