GB/T 24129-2009 in English

《GB/T 24129-2009胶鞋、运动鞋外底不留痕试验方法》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，TC35SC9（全国橡胶与橡胶制品标准化技术委员会胶鞋分会）执行，主管部门为中国石油和化学工业联合会。
本标准规定了胶鞋、运动鞋外底不留痕试验方法。
本标准适用于各类胶鞋、运动鞋外底不留痕迹的试验。

1 Scope

This standard specifies the testing method for the non-marking outsole of rubber shoes and sports shoes.

It is applicable to the test for the non-marking outsole of various rubber shoes and sports shoes.

2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions, of any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest editions apply.

GB 251-1995 Gray scale for assessing change in colour (idt ISO 105/A03: 1993)
GB/T 2941-2006 Rubber - General procedures for preparing and conditioning test pieces for physical test methods (ISO 23529:2004, IDT)

3 Principle

In the process of wearing rubber shoes and sports shoes, under the action of pressure and friction, the outsole of rubber shoes and sports shoes will slip from the ground, the coloured sole materials of rubber shoes and sports shoes will transfer on the ground and leave markings. In this test method, the test piece is placed on the surface of a specified white or black PU standard plate and perform a reciprocating test at specified pressure, number of times, stroke and frequency. After reaching the specified number of tests, observe whether there are marks of test piece on the standard plate, adopt gray scale for color change for making comparison and then assess the degree of marking.

Foreword i
1 Scope
2 Normative references
3 Principle
4 Instruments and materials
5 Test piece
6 Environment conditioning
7 Procedure
8 Expression of results
9 Test report