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GB/T 7985-2025: Conveyor belts - Method for the determination of the tear propagation resistance of textile conveyor belts
Status: Valid GB/T 7985: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 7985-2025 | English | 274 |
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Conveyor belts - Method for the determination of the tear propagation resistance of textile conveyor belts
| Valid |
GB/T 7985-2025
|
| GB/T 7985-2005 | English | 184 |
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Conveyor belts -- Method for the determination of the tear propagation resistance of textile conveyor belts
| Valid |
GB/T 7985-2005
|
| GB/T 7985-1987 | English | 239 |
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Conveyor belts--Carcass tear resistance--Method of test
| Obsolete |
GB/T 7985-1987
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Basic data | Standard ID | GB/T 7985-2025 (GB/T7985-2025) | | Description (Translated English) | Conveyor belts - Method for the determination of the tear propagation resistance of textile conveyor belts | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G42 | | Classification of International Standard | 53.040.20 | | Word Count Estimation | 14,183 | | Date of Issue | 2025-08-29 | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 7985-2005 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | GB/T 7985-2025: Conveyor belts - Method for the determination of the tear propagation resistance of textile conveyor belts
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT7985-2025
ICS 53.040.20
CCSG42
National Standard of the People's Republic of China
Replaces GB/T 7985-2005
Tear-resistant conveyor belt fabric core conveyor belt
Scalable test methods
(ISO 505.2025, IDT)
Released on August 29, 2025
Implementation on March 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Principle 1
5 Device 1
6 Sample 1
6.1 Sampling method 1
6.2 Shape and size 2
6.3 Quantity 2
6.4 Preparation 2
7 Test Method 3
7.1 Conditioning of the specimen 3
7.2 Test conditions 4
7.3 Procedure 4
7.4 Result Presentation 4
7.5 Test report 4
References 6
Preface
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 7985-2005 "Test method for tear propagation resistance of conveyor belts with fabric core" and GB/T 7985-
Compared with.2005, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) Added terms and definitions (see Chapter 3);
b) The sample preparation has been changed (see 6.4, 5.4 of the.2005 edition);
c) The condition adjustment of the specimen has been changed (see 7.1, 6.1 of the.2005 edition).
This document is equivalent to ISO 505.2025 "Conveyor belts with fabric core, test method for tear propagation resistance".
Please note that some of the contents of this document may involve patents, and 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 Conveyor Belt Subcommittee of the National Technical Committee for Pulleys and Belts Standardization (SAC/TC428/SC1).
This document was drafted by. Shandong Chenguang Adhesive Tape Co., Ltd., Sanwei Holding Group Co., Ltd., Zhejiang Fenfei Rubber and Plastic Products Co., Ltd.
Company, Qingdao New Materials Science and Technology Industrial Park Development Co., Ltd., Qingdao Sinochem New Materials Laboratory, Shandong Xiangtong Rubber and Plastic Technology Co., Ltd., Qingdao Science and Technology
Technical University.
The main drafters of this document are. Liu Shengping, Wen Shoudong, Zheng Shisheng, Li Lei, Sun Tao, Wang Shengxu, and Liu Li.
The previous versions of this document and the documents it replaces are as follows.
---First published in 1987 as GB/T 7985-1987;
---First revised in.2005 to GB/T 7985-2005;
---This is the second revision.
Tear-resistant conveyor belt fabric core conveyor belt
Scalable test methods
1 Scope
This document describes the test method for the resistance of conveyor belts with full thickness fabric cores or with the cover removed to initial tear propagation.
This document applies to textile core conveyor belts without transverse metal mesh, used in installations where there is a risk of longitudinal tearing.
2 Normative references
The contents of the following documents constitute the 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.
ISO 6133 Rubber and plastics - Determination of tear strength and adhesion strength - Multimodal curve analysis
Note. GB/T 12833-2006 Rubber and plastics - Determination of tear strength and adhesion strength - Multimodal curve analysis (ISO 6133.1998, IDT)
tioning periods)
Note. GB/T 30691-2014 Conveyor belt test environment and condition adjustment time (ISO 18573.2012, IDT)
3 Terms and Definitions
There are no terms or definitions that require definition in this document.
4 Principles
The specimen is stretched at a specified speed to test the force required to expand the initial crack in the specimen.
5 Devices
The tensile testing machine has the following basic characteristics.
a) The measuring range of the testing machine should be such that the measured force value is within 90% of its measuring range;
b) The separation speed of the two grippers should be adjustable to (50±10) mm/min;
c) The distance between the two clamps holding the specimen should be adjustable to at least 300 mm.
The tensile testing machine should be equipped with a recording device for automatically drawing the tear force curve.
6.Samples
6.1 Sampling method
The specimen should be cut along the longitudinal direction of the belt and at a distance of not less than 50 mm from the edge of the belt.
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