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Which
glove for a chemical? |
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EN374
permeation rates |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
| breakthrough
(min) |
>10 |
>10 |
>30 |
>60 |
>120 |
>240 |
>480 |
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| (a)
Catastrophic breakthrough |
| (b)
Not tested |
| (c)
These rates may be artificially
lower due to detector saturation |
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Select your chemical product
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IMPORTANTE CAUTIOUS:
The resistance of a glove to permeation is
not sufficient ; in fact, when coming into
contact with a chemical substance, a glove
also suffers a change of its physical properties
( hardening or softening ). This is called
DEGRADATION. The resistance of a glove to
degradation is not related to its resistance
to permeation. As a result, the use of a glove
which has a high index degradation when in
contact with a chemical product is not recommended,
even if it has good resistance to permeation.
At present, point 5.3 of the specification
EN374 - 1 1994 stipulates that a test method
for degradation is in the course of preparation.
At present and according to our most recent
information, there is no project of standardisation
of this subject ( the most recent search took
place on 27.06.00 ). Consequently, any existing
test methods used by factories sometimes differ
( study of modifications of mechanical resistance,
abrasion, perforation after soaking the material
of the glove in a chemical product, calculation
of its modifications of percentage weight
gain, loss etc… ). Accordingly, we are
unable to quote uniform results in this area
and we are not setting out indices of degradation
under this head. However, for more information
concerning the resistance of our products
to degradation, please consult us. The laboratory
test results will assist in the selection
of a suitable glove, it being understood that
real conditions of use cannot be simulated
exactly. Accordingly, we cannot do otherwise
than advise you to carry out your own tests
before use in every actual case. It therefore
devolves on the end-user and not on the manufacturer
to determine whether the gloves are suitable
for a proposed use. |
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