course 2 : the gloves

Resistance of the protective gloves to penetration and permeation by noxious substances

Resistance of the protective gloves to penetration and permeation by noxious substances

The resistance of protective gloves against chemicals is based on two precepts:

a) penetration means the movement through the protective glove of a chemical substance through the imperfections of the material or through porosities and leaking seams.

b) permeation means the diffusion at a molecular level of a chemical substance through the material of a protective glove.

The permeation follows according to two criteria: the breakthrough time of the chemical substance and the permeation flux. The permeation flux refers to the quantity of the substance which passes through a protective glove, per surface and time unit. The permeation flux is sometimes more significant than the breakthrough time. In other words, one protective glove can permit the diffusion of a small quantity of substance after a short time, whereas another protective glove only allows diffusion after a longer time, but in a large quantity.

Therefore - if exposed to very toxic substances - it is essential to ask advice from the competent chemist. Specialists are available on request at the manufacturer of the protective gloves.

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