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L’effet de différents paramètres reliés aux aiguilles, comme leur diamètre, le nombre de facettes et l’angle du biseau, ainsi que celui de différentes conditions de test, comme la vitesse de déplacement de la sonde, la taille de l’échantillon, l’angle de pénétration de l’aiguille, la température et l’humidité ont été étudiés pour une liste de matériaux modèles représentatifs des matériaux utilisés pour les gants de protection, ce qui a permis de proposer une méthode de test.
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The effects of various parameters associated with needles, such as their diameter, the number of facets, and their bevel angles, as well as those of various testing conditions, such as the probe movement speed, the sample size, the angle of penetration of the needle, the temperature and humidity, have been studied for a range of model materials representative of those used to make protective gloves, and have culminated in the proposal of a testing method. This method was used to characterize the resistance to medical needle for a list of 60 gloves identified as being of potential interest to the professional groups involved in the project. A comparison of the results obtained using medical needles with those obtained using the standard puncture probe revealed major differences in terms of maximum force. Another observation which illustrates the importance of implementing a standard for medical needle is that there is no correlation between the values obtained with medical needles and those obtained with the standard puncture probe. The effects of a prestrain corresponding to the deformation of the glove by a bending hand movement, for example, were also studied, and proved to be very significant for elastomeric materials. However, no significant effect was measured when a rubber support block was used to simulate the hand under the glove. This indicates that the deformation of the material plays only a minor role in needle puncture.
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