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GB/T 3903.2-2008 English PDF (GBT3903.2-2008)

GB/T 3903.2-2008 English PDF (GBT3903.2-2008)

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GB/T 3903.2-2008: Footwear -- General test methods -- Abrasion resistance

This Part of GB/T 3903 specifies the whole-shoe soles and molded bottom (tablets) abrasion resistant test method. This Part applies to the determination of the whole-shoe soles and molded bottom (tablets) abrasion resistance.
GB/T 3903.2-2008
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 61.060
Y 78
Replacing GB/T 3903.2-1994
Footwear - General test methods -
Abrasion resistance
ISSUED ON. DECEMBER 30, 2008
IMPLEMENTED ON. SEPTEMBER 1, 2009
Issued by. General Administration of Quality Supervision, Inspection, and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of China.
Table of Contents
1 Scope ... 4
2 Terms and definitions ... 4
3 Principle ... 4
4 Sampling and environmental conditioning ... 4
5 Instruments and equipment ... 4
6 Test conditions ... 5
7 Test procedure ... 5
8 Test result ... 6
9 Test report ... 6
Foreword
This Part of GB/T 3903 replaces GB/T 3903.2-1994 "General test method for footwear - Test method of abrasion resistance".
Compared with GB/T 3903.2-1994, the main changes of this Part are as follows. - The standard name is changed to "Footwear- General test methods- Abrasion resistance";
- Add Chapter 2 Terms and definitions;
- Add the requirements to grinding-wheel aperture;
- Add the requirements to test conditions;
- Increase the flexibility of requirements to specimen quantity;
- Reduce the idling time of testing machine.
This Part was proposed by China National Light Industry Council.
This Part shall be under the jurisdiction of National Footwear Standardization Technical Committee.
Drafting organizations of this Part. China Leather and Footwear Industry Research Institute, Aokang Group Co., Ltd. AND Guohui (China) Co., Ltd.
Main drafters of this Part. Yan Hongwei, Wang Zhentao, Ding Guoshi, Zhang Xianzhong and Liu Qi.
The previous editions replaced by this Part are as follows.
- GB 3905-1983;
- GB/T 3903.2-1994.
Footwear - General test methods - Abrasion resistance
1 Scope
This Part of GB/T 3903 specifies the whole-shoe?€?s soles and molded bottom (tablets) abrasion resistant test method.
This Part applies to the determination of the whole-shoe?€?s soles and molded bottom (tablets) abrasion resistance.
2 Terms and definitions
The following terms and definitions apply to this Part of GB/T 3903.
2.1
Abrasion resistance
The wear-scar length that is measured after using abrasion test machine and using rotating steel grinding-wheel to wear, for a certain time, to the flat outsoles. 3 Principle
Rotating grinding-wheel is vertically pressured on the specimen; under specific conditions, conduct abrasion test to the specimen; measure the wear-scar length of the specimen; it is used to represent the abrasion resistance of the specimen.
4 Sampling and environmental conditioning
4.1 Whole-shoe, soles or smooth specimen can be used as a specimen.
4.2 Each set of specimens are generally not less than 2 shoes, soles or pieces. 4.3 Pretreatment of specimen. treat the surface that may affect the test result; the specimens?€? surface is required to be flat; the area shall be sufficient for abrasion; under the test conditions, the specimens shall be placed for more than 4h.
5 Instruments and equipment
5.1 Requirements of abrasion test machine are as follows.
5.1.1 Grinding-wheel is T12 steel grinding-wheel of ??(20??0.1) mm ?? (4??0.1) mm; aperture is (6??0.02) mm, having 72 teeth; tooth-angle is 90????5??; tooth-tip width is (0.2??0.05) mm; tooth- tip roughness Ra is 3.2 um; hardness is ??? 55 HRC; concentricity is 0.03 mm.

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