GB/T 1689-2014Rubber vulcanized-Determination of abrasion resistance (Akron machine) (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 1689-1998 Rubber vulcanized - Determination of abrasion resistance (Akron machine). As compared with GB/T 1689-1998, the main technical changes are as follows: - DELETE the age number of the normative references (see Chapter 2; Chapter 2 of the 1998 edition); - DELETE the normative reference GB/T 9865.1-1996 (see Chapter 2 of the 1998 edition); - ADD relevant content in the principle (see Chapter 3); - ADD Akron machine (see 4.1); - ADD content related to the balance (see 4.2); - ADD recommendations for regular calibration of grinding wheels (see note in Chapter 5); - ADD the use of different sample preparation methods (see note in Chapter 6); - CORRECT the unit of density in the calculation formula (see 9.1;

9.1 of 1998 edition). This standard was proposed by the China Petroleum and Chemical Industry Federation. This standard shall be under the jurisdiction of the National Rubber and Rubber Product Standardization Technical Committee General Test Method Subcommittee (SAC/TC 35/SC 2). Drafting organizations of this standard. Zhongce Rubber Group Co., Ltd., Triangle Tire Co., Ltd., Fengshen Tire Co., Ltd., Qingdao Rubber Conveyor Belt Co., Ltd., Qingdao Yikesi New Materials Co., Ltd., Shandong Bayi Tire Manufacturing Co., Ltd., Qingdao Double Star Group Technology Development Center, Beijing Rubber Industry Research and Design Institute, Guizhou Tire Co., Ltd., Jiangsu Xinzhengwei Testing Machinery Co., Ltd., Jiangsu Mingzhu Testing Machinery Co., Ltd. The main drafters of this standard. Xiang Chan, Xu Qiuhuan, Yan Fujiang, Ren Shaowen, Liu Yuwan, Zhang Feng, Yao Feng, Lin Qingju, Wang Daiqiang, Liu Qiang, Zhao Jianlin, Sha Shufen, Xie Junfang, Li Jing, Feng Ping, Shen Kehui, Zhu Ming. This standard replaces the standards previously issued as follows: - GB/T 1689-1979, GB/T 1689-1982 (1989), GB/T 1689-1998. Rubber vulcanized - Determination of abrasion resistance (Akron machine)

1 Scope

GB/T 1689-2014 is the Chinese national standard on rubber vulcanized-determination of abrasion resistance (akron machine), in the field of rubber and plastic industries. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 22 December 2014 by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of China, and has been in force since 1 June 2015. Classification: ICS 83.060, CCS G40. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This standard specifies the method for determining the abrasion resistance of vulcanized rubber. This standard is applicable to the determination of the abrasion resistance of vulcanized rubber by the Akron machine.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document.

GB/T 533 Rubber vulcanized or thermoplastic - Determination of density ( GB/T 533-2008, ISO 2781.2007, IDT)

3 Principle

In this test, the specimen and the grinding wheel are rubbed under a certain inclination angle and a certain load, to determine the wear volume or wear index of a certain mileage of the specimen.

5 Instrument calibration

5.1 The angle between the rubber wheel shaft and the grinding wheel shaft as well as the load on the specimen are important factors affecting the test results and shall be calibrated periodically.

5.2 Adjust the test machine's base to the horizontal state before calibration.

5.4 Install the load calibrator on the rubber wheel shaft. The right side of the calibrator shall be close to the working surface of the grinding wheel. Place the test weight and adjust the position of the balance weight, so that the load on the specimen is

0.2 N.

6 Specimen

6.1 The specimen is strip-shaped with a length of (D + 2h) pi mm, a width of

0.2 mm, a thickness of

0.2 mm.

6.2 The surface of the specimen shall be flat and shall be free from cracks and impurities.

6.3 After the two sides of the specimen are polished, they are glued to the rubber wheel. The specimen shall not be subjected to tension when bonding. The joint shall be smoothly transitioned during binding. The bonded sample wheel shall be conditioned for at least 16 h.

7 Environment conditioning

The environment conditioning of the sample shall be carried out in accordance with the provisions of GB/T 2941.

8 Procedures

8.1 Fix the glued specimen wheel on the rubber wheel shaft and start the motor to rotate the specimen clockwise.

8.2 Pre-grind the specimen for 15 min ~ 20 min, remove the rubber scraps and weigh the mass, accurate to

0.001 g.

8.4 Determine the density of the specimen according to GB/T 533.

9 Test results

9.1 The wear volume V of specimen is calculated according to formula (1).

9.2 The wear index A (%) of specimen, calculated according to formula (2).