Performance and Quality. ○ Testing Process. ○ ASTM D ○ ASTM D ○ ASTM D ○ Basic Factors to consider for a Reasonable Test program. ASTM Tolerances for Yarns (Multifilament Yarn; Yarn Spun on Cotton or Worsted Systems) .. If seam slippage is determined, follow directions in ASTM D Home; ASTM D/DM(). $; Add to Cart. Printed Edition + PDF; Immediate download; $; Add to Cart.
|Language:||English, Spanish, German|
|Genre:||Academic & Education|
|ePub File Size:||30.41 MB|
|PDF File Size:||14.22 MB|
|Distribution:||Free* [*Register to download]|
D / DM() Standard Test Method for Failure in Sewn Seams of Woven Fabrics sewn seam strength~ Format, Pages, Price. PDF. Standard Test Method for. This test method measures the sewn seam strength in bility of regulatory limitations prior to use. Sewn seams in woven fabrics can fail due to rupture, slippage, or passing through a fabric during sewing. This standard is issued under the fixed designation D ; the number 1 This test method is under the jurisdiction of ASTM Committee D13 on Textiles.
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. Scope priate safety and health practices and determine the applica- 1. Referenced Documents seams. D Practice for Conditioning and Testing Textiles 1.
Because of the biases between statistical bias between their laboratories. Competent statistical test results for these types of tensile testing machine, report the name, type assistance is recommended for the investigation of bias.
As a and date of calibration of the machine used. The test plane of the fabric. If a bias is found, either its cause application by not less than 50 mm 2 in.
See Note 5. NOTE 5Front or top faces measuring 25 by 50 mm 1. Because seam faces. For many materials, the former are preferable because of the larger gripping area which tends to reduce slippage. While both sizes of gripping efficiency varies with each fabric, one of the standard seam surface are permitted, the face sizes used must be the same for all samples assemblies, as noted in Table 1, should be used when compar- in the test and must be recorded in the report.
Table 1 lists the default seam assembly specifications to be used for fabrics 6. If a determi- 6. See Note 6.
NOTE 6An adequate specification or other agreement between the purchaser and supplier requires taking into account the variability between cartons of previously manufactured items or rolls of fabric from which sewn seam will be prepared; and between specimens from a carton of manufactured items or prepared constructions to produce a sampling plan FIG.
If more than one type mens, cut five specimens mm 14 in. See Fig.
Preferably specimens for a given fabric direction should be specimens for each specified seam assembly in each of the spaced along a diagonal of the fabric to allow for representa- warp and fill directions where applicable from the specified tion of different warp and filling yarns, or machine and cross manufactured item s in the laboratory sample. Cut each direction areas, in each specimen. When possible, filling specimen to a total length of mm 14 in.
Unless otherwise specified, take specimens no nearer to seam and mm 4 in. If a bias is found, either its cause must be determined and corrected, or the purchaser and supplier must agree to interpret future test results in light of the known bias.
Because sewn seam strength and sewn seam efficiency varies with each fabric, both of the standard seam assemblies, noted in Table 1, should be used when comparing the seam strength of different fabrics.
Table 1 lists the default seam assembly specifications to be used for fabrics made with fine, medium and heavy count yarns. If a determination cannot be made as to which seam is the best suited for a particular fabric, all should be evaluated. The breaking force of the seam and fabric will permit estimation of seam efficiency. This test method can be used as an aid for estimating seam strength for any given fabric.
See Note 2. Note ;If competent factory sewing operators are not accessible, a laboratory technician familiar with the potential for damage of an improperly sewn seam may prepare the seamed test specimens.
This test method is applicable whenever a determination of effective sewn seam strength, that is, the optimum seam interaction, is required. The breaking force of the seam and fabric will permit determination of seam efficiency. This test method can aid in determining optimum seam interaction for any given fabric by comparing the properties of the fabric with and without seams.
Seam engineering techniques for specific fabric types can also be determined by utilizing this test method. This test method can be used to determine when the sewn seam is affected by seam slippage.