Dust and Particle Protection
Industries – and people – depend on protective garments to keep processes and personnel safe. DuPont knows that one mistake can be critical, to your business or to a person’s life. It therefore uses recognised European or International Standards to assess the quality and performance of its products.
To measure barrier performance against hazardous particulates, DuPont refers to EN ISO 13982-2, as prescribed within the Type 5 product standard. This test essentially determines the barrier efficiency of the suit when challenged with sodium chloride particulates of a defined size distribution (0.6 microns mass median). The amount of sodium chloride that penetrates into the suit is referred to as the inward leakage, expressed as a percentage ratio versus the concentration of the ‘external’ challenge particulates.
The Type 5 product standard allows for an inward leakage of up to 15% in 8 out of 10 suits tested, meaning that there is room for significant variation in barrier performance amongst coveralls that have been certified as meeting this standard. Therefore, when working with hazardous particulates, users should compare the performance of different suits and select the model most appropriate to their particular application.
When comparing the barrier performance of DuPont coveralls made from Tyvek®, microporous film (MPF) and SMS, under EN ISO 13982-2 test conditions, the Tyvek® models outperform those made from SMS and MPF . Within the Tyvek® range, barrier performance increases according to the degree of body coverage provided by the particular model, as well as its tightness and fit. DuPont therefore recommends selecting a model based on the hazard represented by the particulates and their concentration in the environment. For enhanced particulate protection, the Tyvek® Classic Xpert provides the best barrier in DuPont’s Type 5/6 range. Should Type 4 protection also be required, Tyvek® Classic Plus and Tyvek® Classic Plus with Socks offer the best barrier of the entire Tyvek ®range. To see the test results, click here.
The standard EN 1073-2 is used to define the requirements and test methods for determining the performance of protective clothing used in environments with radioactive particulates. The test method also measures the inward leakage of particulates into the whole suit, which is then expressed as its nominal protection factor (NPF). It comes as no surprise that the NPF increases with the body coverage provided by the Tyvek® model and the tightness and fit of its design: Tyvek® Labo, Tyvek® Classic Xpert and Tyvek® Classic Plus all meet EN 1073-2 Class 2 (nominal protection factor > 50). In environments with a high concentration of radioactive particulates, the specifier will reduce risk by selecting a suit with a high NPF , such as Tyvek® Classic Plus. To see the test results, click here.
All of the above helps keep the worker safe. But Tyvek® suits protection works in two ways - also keeping processes free from particle contamination. Tyvek® is low-linting, as tested by BS 6909, a standard method for the generation and counting of the airborne linting propensity of fabrics in their dry state. By nature of its continuously strong, high-density polyethylene fibres Tyvek® does not shed, making it an ideal material for applications such as painting and pharmaceutical production. To see the test results, click here.
For more information about chemical protection, please click here.