GB/T 47632-2026Dipped reinforcing materials - Test method for moisture content (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". Drafting. Please note that some content in this document may involve patents. The issuing organization of this document assumes no 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 Standardization of Rubber and Rubber Products (SAC/TC35). This document was drafted by: Jinhua Yalun Chemical Fiber Co., Ltd., Anhui Huaye Special Materials Co., Ltd., and Qingdao Haishengtai Materials Co., Ltd. Company, Changzhou Chaofeng Adhesive Wire Technology Co., Ltd., Qingdao Sanxiang Technology Co., Ltd., Qingdao University of Science and Technology. The main drafters of this document are. Xiang Ruiyang, Shi Jie, Liu Xiao, Yang Jie, Shang Shihao, Zhang Baogang, Zhuge Leke, and Xiang Xin. Test method for moisture content of impregnated skeleton materials

1.Scope This document describes the experimental principle, equipment and tools, and procedures for determining the moisture content of resin-impregnated skeleton materials using an oven hot air drying method. General rules, test procedures, data calculation, and test reports. This document applies to the determination of moisture content and moisture regain of PVC-impregnated reinforcing materials such as tire cord fabric, canvas, rope, and yarn.

4.Experimental Principle After weighing the sample, it is placed in an oven at a specified temperature until a constant weight is reached. During this process, the mass loss of the sample is related to its initial mass before drying. The ratio of the mass loss of the sample to the mass after drying is the moisture content of the sample, and the ratio of the mass loss of the sample to the mass after drying is the moisture regain of the sample.

5 Test equipment and tools

5.1 Oven The test oven should be a pressure-type or convection-type ventilated oven, and should meet the following conditions.

a) It has a constant temperature control device;

b) During the drying process, the temperature fluctuation range of the exposed part of the sample is ±2°C.

5.2 Weighing Container The weighing container should be a weighing bottle.

5.3 Dryer The dryer should be able to accommodate one or more weighing containers. The desiccant placed inside the dryer should meet drying requirements, be replaceable, and non-corrosive. Corrosive.

6 General Rules for Testing

6.1 Test Environment The test shall be conducted in the test environment specified in GB/T 36798.

7 Test Procedure

7.1 After sampling, the pre-drying mass (G) of the sample should be weighed quickly and recorded, retaining 4 decimal places.

7.2 Turn on the oven power and keep it at a stable temperature of (105±2)°C for 15 minutes.

7.3 Place the weighing bottle containing the sample into the oven, open the weighing bottle cap, and dry until constant weight.

7.4 After sealing the weighing bottle in the oven and transferring it to a desiccator to cool to room temperature, immediately weigh the sample after drying (G0) and record it. To 4 decimal places.

7.5 Calculate the moisture content of the sample. If the relative deviation of the values of two out of the three samples is greater than 10%, the test should be repeated.

9 Test Report

The test report should include at least the following.

a) The name and number of this document;

b) Name, batch number, and material of the sample;

c) Number of samples;

d) Test results for moisture content and moisture regain;

e) Any details that deviate from this document;

f) Test personnel and test date.