Textiles—Testing and evaluation for snagging resistance of fabrics—Part 2: Rotating chamber method
1 Scope
This document describes the rotating chamber method for testing the snagging resistance of fabrics, and specifies the evaluation requirements of snagging resistance.
This document is applicable to the knitted fabric and woven fabrics.
This document is not applicable to mesh-structure fabrics, tufted fabrics and non-woven fabrics.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 6529 Textiles—Standard atmospheres for conditioning and testing
GB/T 21196.1 Textiles—Determination of the abrasion resistance of fabrics by the Martindale method—Part 1: Martindale abrasion testing apparatus
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
snag
surface defect in a fabric where a yarn or fiber is hooked by a sharp object
Note: snag usually includes the hooked protrusions on the surface of fibers or yarns, such as coils, fiber loops, fiber bundles, fluff, etc.; and the hooked distortion formed by local yarns or fibers. Snag usually exists in one or several combinations of these phenomena.
3.2
distortion
streak-like deformation on the surface of fabric due to local yarns or fibers in a fabric hooked by sharp objects, which is obviously closer to the adjacent yarns
4 Principle
Install the cylindrical specimen on a felt-coated polyurethane sample-carrying tube and then place it in a regular octahedral snag test chamber with four rows of snag nails inside. When the snag test chamber rotates at a constant speed, the sample-carrying tube with specimen is randomly turned over and rolled, and hooked with snag nails, which will cause appearance changes such as snag on the surface of specimen. After rotating for specified revolutions, evaluate the snag of the specimen.
Foreword i
Introduction ii
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Equipment and material
6 Atmosphere for humidity control and test
7 Specimen
8 Test steps
9 Grading and result
10 Evaluation of snag performance
11 Test report
Annex A (Informative) Regular cleaning and verification of the snag test chamber
Bibliography
