GB/T 31128-2025 Testing and evaluation of the resistance to pile loop extraction for towel products
1 Scope
This document describes two test methods for and gives the evaluation indexes of the resistance to pile loop extraction for towel products.
This document is applicable to woven towel products, whose surface is covered with pile loops with a height ≥ 2.5 mm, and their products, and may serve as a reference for weft-knitted towels.
This document is applicable to twistless towel products.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions 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 3923.1-2013 Textiles - Tensile properties of fabrics - Part 1: Determination of maximum force and elongation at maximum force using the strip method
GB/T 6529 Textiles - Standard atmospheres for conditioning and testing
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
FZ/T 60044-2014 Test method for loops height of towel product
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
resistance to pile loop extraction
maximum force required to extract a certain number or length of loops out of the towel tissue
[Source: FZ/T 60053-2024, 7.5, modified]
4 Principle
A tensile strength tester with a yarn extraction device is used to determine the maximum force required to extract a certain number or length of loops from a towel tissue, and this force is used to evaluate the resistance to extraction of the sample.
Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 Atmospheres for conditioning and testing 6 Equipment, materials and reagents 7 Specimen preparation 8 Testing 9 Result calculations 10 Evaluation 11 Test report Annex A (Informative) Schematic diagram for sampling Annex B (Normative) Reading of test results of resistance to pile loop extraction Bibliography
