GB/T 47897.1-2026Determination of the thermal adhesion of dipped cords and yarns — Part 1: U extraction method (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

This document is Part 1 of GB/T 47897, "Determination of Adhesive Properties of Resin-Plated Cords, Ropes and Yarns". GB/T 47897 has been issued. The following parts were laid out.

---Part 1: U-Extraction Method.

Introduction

Rubber-impregnated cords, ropes, and yarns are important categories of rubber-impregnated reinforcing materials. The quality of their adhesion to rubber is crucial.

It is a crucial factor related to the quality of products and rubber products, and also a key factor related to product safety and personal safety. Currently, the domestic and international industry... The main methods for testing adhesive properties include the U-pull method, sheet peeling method, and single-strand peeling method, etc., based on the actual situation of the industry and the development over the years.

Establishing established practices for adhesive performance testing and standardizing the test methods for adhesive performance determination will help improve product quality and promote industry development. Collaborative development and technological progress across the industry chain.

GB/T 47897 "Determination of Adhesive Properties of Glue-Dipped Cords, Ropes and Yarns" is proposed to consist of three parts.

---Part 1: U-Extraction Method. The purpose is to determine the adhesive properties using a U-shaped sample under heating.

---Part 2: Sheet Peel Method. The purpose is to determine adhesive properties using sheet samples.

---Part 3: Single-strand peeling method. The purpose is to determine the adhesive properties using a single-strand sample.

1 Scope

This document describes the test principle, equipment, test rules, and test procedure for determining the adhesive properties of PVC-impregnated cords, ropes, and yarns using the U-extraction method. Preface, results calculation and test report.

This document applies to the determination of the adhesive properties of fiber-made impregnated cords, ropes, yarns, and rubber under heated conditions.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. This document.

GB/T 2941 General Procedures for Specimen Preparation and Conditioning in Physical Testing Methods for Rubber

GB/T 8170 Rules for rounding off numerical values and the representation and determination of limiting values

GB/T 32110 Terms and Definitions for Resin-Impregnated Reinforced Reinforced Materials

3 Terms and Definitions

The terms and definitions defined in GB/T 32110 apply to this document.

A sample module is prepared by vulcanizing rubber with rubber using rubber-impregnated cord, rubber-impregnated rope, or rubber-impregnated yarn. The sample module is then embedded into the heating clamp of the testing device.

The holder is heated to a set temperature, and the U-shaped wire loop on the specimen module is extracted from the specimen module using a tensile testing machine. The result is... The maximum force value is the thermal adhesive force between the rubber-impregnated cord, rubber-impregnated rope, rubber-impregnated yarn and rubber. This value is used to characterize the bonding force between the rubber-impregnated cord, rope, yarn and rubber. The thermal bonding properties of the adhesive.

4 Experimental Principle

5 Equipment

5.2 Test Apparatus.