Tear test of Fabric by trapezoid method to ASTM D ASTM D covers the measurement of the tearing strength of textile fabrics by the trapezoid tear test using a constant-rate-of-extension-type (CRE) tensile. ASTM D Tearing Strength of Fabric by. Trapezoid Procedure. • Scope – this test method describes the determination of the tearing strength of fabrics by the.
|Published (Last):||28 December 2005|
|PDF File Size:||16.14 Mb|
|ePub File Size:||11.64 Mb|
|Price:||Free* [*Free Regsitration Required]|
Take the specimens to be used for the measurement of the cross-machine direction with the longer dimension parallel to the crossmachine direction. We offer machines, apparatus, testers, tensile grips, test fixtures, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, furnaces, baths and custom solutions for unique applications.
Tear Strength of Fabrics – Trapezoid Procedure
The force to continue the tear is calculated from autographic chart recorders or microprocessor data collection systems. There were sufficient differences related to the fabric type and structure to warrant listing the components of variance and the critical differences separately. 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.
The highest peaks appear to reect the strength of the yarn components, individually or in combination, needed to stop a tear in fabrics of the same construction. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn. Rapid data capture rate Specimen gripping Instron’s Solution: Email addresses must contain the symbol. Analysis of the data was conducted using Practices D and Das well as the adjunct Tex-Pac.
Concrete, Asphalt and Rock. Instructions are provided for testing specimens with or without wetting. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
Label to maintain specimen identity. The components of variance for trapezoid tear strength expressed as standard deviations were calculated to be the values listed in Table 3. Bluehill LE for Basic Testing. For denitions of other terms related to force and deformation in textiles, refer to Terminology D Current edition approved Feb.
Four of the eight specimens were tested on one day and four specimens were tested on a second day.
G Hydraulic Vice Action Grip. Consequently, these test instruments may be used when agreed upon between the purchaser and the supplier.
ASTM D – tearing strength of fabrics by the trapezoid procedure
Instructions are provided for testing specimens with or without wetting. Historical Version s – view previous versions of standard. Record astmm as read from the direct-reading scale to the nearest 0. Mark each specimen with an isosceles trapezoid template see Figs.
This standard mainly applies to most woven textile fabrics, but can be applicable to fabrics produced by other techniques.
The average results from the two laboratories astk be compared using the appropriate statistical analysis and an acceptable probability level chosen by the two parties before testing is begun.
The values stated in inch-pound units may be approximate.
Describe the fabric or product sampled and the method of aztm used. Consequently, no multi-fabric comparisons were made. Precision and Bias The test aztm from the laboratories involved should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Consequently, these test instruments may be used when agreed upon between the purchaser and the supplier.
ASTM D Tearing Strength of Fabrics by Trapezoid Procedure
The reported value obtained is not directly related to the force required to initiate or start a tear. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
For fabrics not readily wet out with water, such as those treated with waterrepellent or water-resistant materials, add a 0. In the absence of such an agreement, take the number of fabric rolls specied in Table 1. They are designed with standard and optional features that increase testing efficiency and improve the testing experience for the operator. At the same time, the force developed is recorded.
Software for Series Systems. Strong fabrics or fabrics made from glass fibers require special adaptation to prevent them from slipping in the clamps or being damaged as a result of being gripped in the clamps.
Before a meaningful statement can be made about two specic laboratories, the amount of statistical bias, if any, between them must be established with each comparison being based on recent data obtained on specimens taken from a lot of fabric to the type being evaluated, so as to be as nearly homogeneous as possible, and then randomly assigned in equal numbers to each of the laboratories.
The reported value obtained is not directly related to the force required to initiate or start a tear.
ASTM D5587 Tearing Strength of Fabrics by Trapezoid Procedure
If bias is found, either its cause must be found and d587, or future test results for that material must be adjusted in consideration of the known bias. Some modication of clamping techniques may be necessary for a given fabric, depending upon its structure. Consequently, these test instruments may be used when agreed upon between the purchaser and the supplier. Disengage the pawls from the rachet to render them inoperative. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
The three woven fabric types were: For most fabrics this time period will be about 1 h.