GB/T 3688-2025 English PDF

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GB/T 3688-2025: Test method for adhesion performance of V-belt cords
Status: Valid

GB/T 3688: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 3688-2025	299	Add to Cart	3 days	Test method for adhesion performance of V-belt cords	Valid
GB/T 3688-1998	139	Add to Cart	2 days	V-belt. Cord adhesion test method
GB/T 3688-1983	RFQ	ASK	3 days	V-belts--Adhesion between rope and rubber--Method of test	Obsolete

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Basic data

Standard ID: GB/T 3688-2025 (GB/T3688-2025)
Description (Translated English): Test method for adhesion performance of V-belt cords
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G47
Classification of International Standard: 83.140.99
Word Count Estimation: 14,115
Date of Issue: 2025-04-25
Date of Implementation: 2025-11-01
Older Standard (superseded by this standard): GB/T 3688-1998
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 3688-2025: Test method for adhesion performance of V-belt cords

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 83.140.99 CCSG47 National Standard of the People's Republic of China Replaces GB/T 3688-1998 Test method for adhesion performance of V-belt cords Released on 2025-04-25 2025-11-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB/T 3688-1998 "Test method for adhesion strength of V-belt cords". Compared with GB/T 3688-1998, except for the structural In addition to adjustments and editorial changes, the main technical changes are as follows. a) The scope has been changed and the stripping method has been added (see Chapter 1, Chapter 1 of the.1998 edition); b) Added terms and definitions (see Chapter 3); c) The test principle has been changed (see Chapter 4, Chapter 3 of the.1998 edition); d) The size and structure of the test holder have been changed, and sample preparation tools have been added (see Chapter 5, Chapter 4 of the.1998 edition); e) Added general test rules (see Chapter 6); f) The test procedure was changed and fatigue test was added (see Chapter 7, Chapter 6 of the.1998 edition); g) The test data processing has been changed (see Chapter 8, Chapter 7 of the.1998 edition); h) Added the dynamic fatigue test method for ordinary cloth straps (see Appendix A). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Petroleum and Chemical Industry Federation. This document is under the jurisdiction of the National Technical Committee on Rubber and Rubber Products (SAC/TC35). This document was drafted by. Sanlishi Co., Ltd., Qingdao Tianbang New Materials Co., Ltd., Qingdao Haishengtai Materials Co., Ltd., Jinhua City Yalun Chemical Fiber Co., Ltd., Qingdao University of Science and Technology. The main drafters of this document are. Wu Qiongying, Yu Chong, Zhang Baogang, Xiang Jun, Qu Jinlei and Xu Shijia. This document was first published in.1998 and this is the first revision. Test method for adhesion performance of V-belt cords

1 Scope

This document describes a test method for determining the adhesion between the cord and rubber in rubber V-belts using the extraction method and the peeling method, respectively. This document is applicable to the determination of the adhesion between the cord and rubber in rubber V-belts and the determination of the adhesion between the cord and rubber in rubber multi-ribbed belts. Refer to the implementation.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 8170 Rules for rounding off values and expression and determination of limit values GB/T 11356.1 Belt drive V-belt pulleys (reference width system) Groove test GB/T 11357 Pulley material, surface roughness and balance GB/T 11545 Fatigue test of V-belts for belt drive automotive industry GB/T 12730 Narrow V-belts for general transmission GB/T 12735 Fatigue test of V-belts for belt-driven agricultural machinery GB/T 12833 Multi-peak curve analysis in the determination of tear strength and adhesive strength of rubber and plastics GB/T 16491 Electronic universal testing machine GB/T 32110 Terms and definitions for impregnated skeleton materials HG/T 4493 Lightweight V-belts for agricultural machinery

3 Terms and definitions

The terms and definitions defined in GB/T 32110 and the following apply to this document. 3.1 The bonding strength of the bonding interface between the cord skeleton and the rubber of a non-fatigued rubber V-belt. 3.2 The bonding strength of the bonding interface between the cord skeleton and the rubber after the rubber V-belt has undergone dynamic fatigue operation. 3.3 The ratio of dynamic bond strength to initial bond strength.

4 Test Principle

The initial bonding strength and dynamic bonding strength between the cord and rubber in the V-belt were measured by the extraction method and the peeling method respectively, and the bonding strength was calculated. ......

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