ISO 19957:2021 履物—かかとの試験方法—かかとのピン保持力 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 216, Footwear, in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 309, Footwear, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This second edition cancels and replaces the first edition (ISO 19957:2004), which has been technically revised. It also incorporates the Technical Corrigendum ISO 19957:2004/Cor 1:2005.

The main changes compared to the previous edition are as follows:

• small correction in the formula of the calculation of heel pin holding strength, given in 7.1;
• the title of Clause 5 has been changed from “Sampling and conditioning” to “Sampling and preparation”;
• two figures have been added to illustrate how the sample is clamped between the two jaws of the tensile testing machine;
• some editorial changes and wording revision to clarify the text.

1 Scope

This document specifies a test method for measuring the force required to pull a single heel pin out of a heel. This test method is used both to measure the heel pin holding strength of heel materials by using a standard heel pin and a method of insertion, and to assess the heel nailing of commercial production.

This test method is applicable to testing plastics and wooden heels for women’s footwear. Heels composed of layers of fibreboard or leather and low plastics heels for men’s footwear cannot be tested by this method.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

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