What is ISO 19957 about?
ISO 19957 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.
ISO 19957 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.
Who is ISO 19957 for?
ISO 19957 on heel pin holding strength is useful for:
- Heels manufacturer
- Footwear designers
Why should you use ISO 19957?
Deficiencies in footwear design or production that result in heel breaking or completely detaching can have significant consequences. These include the potential for injury and litigation, the high costs associated with product recalls, and the loss of brand image. ISO 19957 measuring the force required to pull a single heel pin out of a heel.
It is necessary to measure the strength of the heel pin as it may include the potential injury and litigation and may lose the brand name or the goodwill of the company, so it is necessary to measures the strength of the heels pin the best quality heels will improve the goodwill of the company.
What is changed since the last update?
BS EN ISO 19957:2021 supersedes ISO 19957:2004. BS EN ISO 19957:2021 includes some technical changes with respect to ISO 19957:2004. These include:
- Small correction in the formula of the calculation of heel pin holding strength
- The title 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