AllroundLine for individual testing requirements and all applications
The tests carried out on textile fabrics are just as varied as the uses found for their finished products. Depending on test requirements, specimens are tested in a wet or dry state, having been removed parallel to the warp and weft directions of the fabric.
Zwick offers ideal solutions for these types of tests: wide ranging design testing machines, well-suited specimen grips, and corresponding grip inserts, as well as testXpert software proven for every application.
Specially cut specimens are used for the tear growth test. Tests according to EN ISO 9073-4 are carried out on trapezoid specimens, whereby the use of very wide jaws should be noted. Pneumatic grips are preferred because they offer even and subsequent adjustment of the gripping.
Tests according to DIN EN ISO 13937-2, the so-called trouser tear test, use test specimens cut to resemble a pair of trouser legs. The tear force is the force required to propagate this cut when applied parallel to the cut and the textile fabric tears in the direction of the force. The use of pneumatic grips is recommended.
One important quality characteristic in processing textile fabrics is seam slippage resistance.
This example concerns the P12 test developed by Marks & Spencer for testing seam slippage on apparel fabrics. This standard describes the determination of the resistance offered by the yarn filaments in an apparel fabric to a shift in the seam area caused by the sewing threads.
The 75 mm wide fabric specimens are held in pneumatic grips and the force is measured when the seam separates by a defined distance. The force-travel diagrams of a seamed and a seamless reference test specimen of the same material are then compared.
The tests according to Marks & Spencer are precisely defined and may not be changed.We are authorized to perform the following tests according to Marks & Spencer:
P11, P12, P12A, P12B, P13, P13A, P14, P14A, P15 Part 1 and P15A
Bursting strength is the resistance of a specimen held between circular clamps to a unidirectional, uniformly distributed, increasing compression load, up to burst point.
This characteristic is determined according to ISO 3303 Method A, on plastics or rubber-coated fabrics, using a suitable materials testing machine with ring clamps and steel ball.
In this example tests are carried out on textile glass fabric. The international standard specifies the method for determining the force at break and elongation at break of frayed strips of woven textile glass. This method is used for untreated glass fabrics or glass fabrics treated with reinforcement materials, however not for glass fabrics coated with plastics or elastomers.
In tests according to ISO 4606, 50-mm wide strip specimens are tested in the warp and in the weft direction until failure. A clamping length of 200 mm is used. Since high gripping forces are required to hold the specimen in compliance with standards, pneumatic specimen grips are used. The test samples must have no creases, folds, selvedge or areas which are not representative of the fabric.