January 1, 2020 By:

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.

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How can we help you? The fabrics may be untreated, heavily sized, coated, resin-treated, or otherwise treated. By continuing to use our site, you accept our cookie policy. Forces up to 10 kN 2, lbf Low force tabletop systems Modular series of five frame options with adjustable test space Affordable testing option for tension, compression, bend, peel and e5587 more.

The method specifies a procedure to determine the tear force of textile fabrics using the trapezoid method. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The challenges of testing to this standard are: Disengage the pawls from the rachet to render them inoperative.

Tear Strength of Fabrics – Trapezoid Procedure

Description Literature Contact Us This standard mainly applies to most woven textile fabrics, but can be applicable to fabrics produced by other techniques. The reported value obtained is not directly related to the force required to initiate or start a tear. Email addresses must contain the symbol. Active view current version of standard. If more than 2 min elapse between taking the wet specimen from the water bath and starting asttm tension testing machine, discard the specimen and take another.


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.

The average results from the two laboratories should be compared using the appropriate statistical analysis and an acceptable probability level chosen by the two parties before testing is begun. Adjustable grip pressure also allows users to fine-tune the gripping pressure to avoid jaw breaks or slippage.

ASTM D – 05 Standard Test Method for Tearing Strength of Fabrics by Trapezoid Procedure

Subscribe to Our Newsletters. The nonparallel sides of the marked trapezoid are clamped in parallel jaws of a tensile testing machine. This test method allows the use of the CRT-type tensile machine when agreed upon between the purchaser and the x5587. Record values as read from the direct-reading scale to the nearest 0.

Have a question about conducting the test for this standard? Consequently, these two tensile testers cannot be used interchangeably unless the degree of quantitative correlation has been established between the purchaser and the supplier. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Bluehill LE for Basic Testing.

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. Force range of 5 kN to kN 1, lbf tolbf Adjustable test space The most popular choice for static tension and compression tests These dual column testers are available in both tabletop and floor standing models.


The conditions for use of the CRT-type tensile tester are included in. If bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias.

The valleys recorded between the peaks have no specific significance. NOTE 2—The tabulated values of the critical differences should be considered to be a general statement, ashm with respect to betweenlaboratory precision.

ASTM D – tearing strength of fabrics by the trapezoid procedure

Subscribe to Instron News! Preparation of Test Apparatus asmt Calibration 8. For fabrics not readily wet out with water, such as those treated with waterrepellent or water-resistant materials, add a 0.

Software for Series Systems. Consider the rolls or pieces of fabric to be the primary sampling units. 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.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.