GB/T 31702-2015Testing method for the sharpness of attached components on textile products (English PDF)

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by China Textile Industry Association. This standard by the National Standardization Technical Committee Textile (SAC/TC209) centralized. This standard was drafted. Textile Industry Standardization Institute, Textile Industry Science and Technology Development Center. The main drafters of this standard. Xu Road, Sunxi Min, Zhang Hui, Fang Xijiang, Zheng Yuying. Textiles Annex sharp Test Method

1 Scope

China's national test method for the sharpness of the components attached to textile products. It specifies methods for testing attachments for sharp edges and sharp points, and it applies to attachments made of metal, plastic and other materials. An attached component is defined here as anything on a textile product that connects, decorates, identifies or otherwise acts on it - buttons, zips, decorative plates and the like. A sharp edge is an accessible edge that may cause a cutting injury, and a sharp point an accessible tip that may cause a puncture injury. The reason the test exists is that these are the parts of a garment that injure people, and children in particular: a zip pull with a burr from the press, a button with a moulding flash, a rivet with a sharp rim, a decorative plate with a stamped edge that was never deburred. The garment fabric is soft and safe, and the hazard is entirely in the hardware attached to it. The methods are physical and deliberately simple. For sharp edges, a test tape is applied to a steel mandrel and the mandrel is rotated through a full turn along the edge under a specified load; the length of tape cut measures the edge's ability to cut. For sharp points, a sharp point tester is applied to the accessible tip under a specified load, and the test is whether the tip penetrates to the defined depth. The mandrel is specified precisely - 9.35 mm in diameter, free of scratches, dents and burrs, with a surface roughness no rougher than 0.4 micrometres and a surface hardness of not less than 40 HRC - because the mandrel is the reference surface against which every result is obtained. Issued and in force from 26 May 2015.

This standard specifies the textile products in Annex sharp edges and sharp points of the Test Method. This standard applies to accessory textiles metal, plastic and other materials.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 230.1 metallic materials - Rockwell hardness test - Part 1. Test methods (A, B, C, D, E, F, G, H, K, N, T scale)

GB/T 3505 Geometrical product specifications (GPS) Surface texture Profile method - Terms, definitions and surface texture parameters

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Annex attachedcomponents Connection, decoration, logo or other components from the effects on textile products, such as buttons, zippers and decorative sheet and the like.

3.2 Sharp edges sharpedge Annex edge cut may produce hazardous palpable.

3.3 Sharp tip sharppoint It may have stabbed harm palpable attachment tip. Principle

4 Sharp Edge Test method. the test strip should be affixed on the mandrel, at a certain load so accessible mandrel being tested along the edge of the rotation 360 °, measuring the length of the test strip to be cut. Sharp point test method. a sharp point tester accessible on the tip, examined under a certain load is tested whether the tip can be inserted The provisions of the sharp tester depth.