2017-12-01 12:00 - Messages

Standard Specification for Performance Requirements for Protective (Safety) Toe Cap Footwear

This specification covers the minimum design, performance, testing, and classification requirements, and prescribes fit, function, and performance criteria for footwear designed to be worn to provide protection against a variety of workplace hazards that can potentially result in injury. It is not the intention of this specification to serve as a detailed manufacturing or purchasing specification, but can be referenced in purchase contracts to ensure that minimum performance requirements are met. Footwear conforming to this specification shall meet the performance requirements for the following: impact resistance for the toe area of footwear; compression resistance for the toe area of footwear; metatarsal protection that reduces the chance of injury to the metatarsal bones at the top of the foot; conductive properties which reduce hazards that may result from static electricity buildup, and reduce the possibility of ignition of explosives and volatile chemicals; electric shock resistance; static dissipative (SD) properties to reduce hazards due to excessively low footwear resistance that may exist where SD footwear is required; puncture resistance of footwear bottoms; chain saw cut resistance; and dielectric insulation.

Source: https://www.astm.org/Standards/F2413.htm

Vêtements de travail de protection contre les feux à inflammation instantanée causés par des hydrocarbures et facultativement contre la vapeur et les liquides chauds

La présente Norme nationale du Canada énonce les exigences minimales de rendement ainsi que les méthodes d'essai relatives aux vêtements de travail portés pour se protéger contre les expositions imprévues aux feux à inflammation instantanée causés par des hydrocarbures et facultativement contre la vapeur et les liquides chauds.

Source: http://publications.gc.ca/site/fra/9.848261/publication.html

Evaluation of body heating protocols with graphene heated clothing in a cold environment

Purpose: The purpose of this paper is to evaluate the effects of intermittent and continuous heating protocols using graphene-heated clothing and identify more effective body region for heating in a cold environment.
Design/methodology/approach: Eight males participated in five experimental conditions at an air temperature of 0.6°C with 40 percent relative humidity: no heating, continuous heating the chest, continuous heating the back, intermittent heating the chest, and intermittent heating the back.
Findings: The results showed that the electric power consumption of the intermittent heating protocol (2.49 W) was conserved by 71 percent compared to the continuous protocol (8.58 W). Rectal temperature, cardiovascular and respiratory responses showed no significant differences among the four heating conditions, while heating the back showed more beneficial effects on skin temperatures than heating the chest.
Originality/value: First of all, this study was the first report to evaluate cold protective clothing with graphene heaters. Second, the authors provided effective intermittent heating protocols in terms of reducing power consumption, which was able to be evaluated with the characteristics of fast-responsive graphene heaters. Third, an intermittent heating protocol on the back was recommended to keep a balance between saving electric power and minimizing thermal discomfort in cold environments.

Source: http://www.emeraldinsight.com/doi/abs/10.1108/IJCST-03-2017-0026

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