Assessing the slip resistance of city and leisure footwear
In the previous CTC study undertaken, we examined the test methods and changes that seek to assess the performance of PPE footwear (Personal Protective Equipment) in view of the risks posed by slipping. While slipping represents a serious risk in the world of work and forms part of the mandatory requirements placed on safety footwear, it is also important for day-to-day use and can be understood and assessed for city and leisure footwear.
在此前 CTC 的研究中，我们主要考察测试方法及其变化来评估 PPE 鞋类（个人防护装备）性能，以考虑滑倒带来的风险。滑倒在工作环境中是一种严重的风险，并且防滑性能是安全鞋强制性要求的一部分，但防滑性对于日常鞋类也同样重要，同样可以用来评估城市和休闲鞋类。
Drawing on its expertise in testing and PPE CE marking, CTC puts forward a test method that meets the expectations of those responsible for marketing city and leisure footwear.
基于我们在测试和个人防护设备CE 认证方面的专业知识，CTC 提出了一种测试方法，可满足城市和休闲鞋类用户的期望。
SLIPPING, A RISK TO BE MASTERED TO PREVENT FALLING
Falling is caused by a slip that cannot be controlled by the person, who then loses his balance. Anybody who has to walk about is concerned by slipping. It is indissociable from locomotion as soon as two surfaces come into contact. Slipping is due to:
- a lack of grip between the sole and the ground ;
- environmental factors, such as uneven surfaces, moisture and the presence of slippery elements;
- human factors, specific to each person.
To prevent these risks, city and leisure footwear must provide a level of grip that meets the needs of users as closely as possible.
The sole - particularly the choice of sole material and the geometry of the sole’s tread - plays a vital role in ensuring grip.
To prevent a fall, a sole’s resistance to slipping has to be determined. The friction coefficient between interacting surfaces is an important factor for predicting slip resistance during walking.
To prevent a fall, two conditions have to be met:
- restrict the initial slipping of the foot (static);
- limit the speed of slipping so as not to lose the balance (dynamic).
AN ADAPTED RESPONSE – ASSESSMENT OF SLIPPING ACCORDING TO NF EN ISO 24267
快速响应 – 根据标准NF EN ISO 24267 评估滑动性能
CTC, drawing on its know-how, offers various laboratory tests to assess the slipping of city and leisure/sports footwear.
In order to respond to this problem and ensure the safety of users, standard NF EN ISO 24267 (November 2020) determines a test method.
It applies to all types of footwear (casual, sports, high heels, sandals, etc.), outsoles, top pieces and sole material, except for PPE footwear and special purpose footwear containing spikes, me tal studs or similar elements.
为了应对这一问题并确保用户的安全，标准 NF EN ISO 24267（2020 年 11 月）确定了一种测试方法。
它适用于所有类型的鞋类（休闲鞋、运动鞋、高跟鞋、凉鞋等）、外底、鞋跟贴面和鞋底材料，但 PPE 鞋类和包含鞋钉、金属钉或类似元素的特殊用途鞋类除外。
To simulate user conditions, forward-moving tests on a flat surface and forward-moving heel tests are carried out on a wet ceramic floor.
In order to characterise a material prior to moulding, it is also possible to carry out forward-moving tests on a flat surface on plates of material.
To respond to this problem and prevent these risks, a number of European brands and instructing parties have already decided to incorporate this standard and these tests into their product specifications.
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