Abstract
Protective efficiency of filtering dust respirators depends on the properties of filter materials from which filters are made and the structure of a half mask frame, which influences how tightly the respirator fits the face. The conducted studies on the “Lepestok 40” dust respirator revealed a large air leakage through the gaps occurring along the obturation strip. Therefore, the purpose of the study is to develop a dust respirator to provide high level of protection and usability by improving the half mask frame design. A scheme for designing a dust respirator: analysis of operating conditions for the dust respirator; facial anthropometric measurements of potential users; designing a 3D model of half mask frame; laboratory testing of the protective properties of the product. A distinctive feature of this approach is considering the facial anthropometric dimensions of employees of a particular enterprise, standard sizes formation of 3D facial models, which is the basis for designing a half mask frame for dust respirator. A new half mask frame design for dust respirator with a variable geometry of fitting to the face surface has been developed, due to special attachment points that allow changing its size according to the anthropometric dimensions of user’s face.
Highlights
A filtering dust respirator Standard 203 is used, which has been certified for compliance with the European Council Directive 89/686/EEC on personal protective equipment and meet the requirements of the Technical Regulations for Personal Protective Equipment, approved by the Resolution of the Cabinet of Ministers of Ukraine dated 27 August 2008, No 761
A procedure is presented for determining the penetration coefficient of sodium chloride aerosol into the under-mask space of the developed Filtering dust respirator (FDR) with the participation of the experimental group
The main reasons that worsen the FDR protective efficiency have been established; these are gaps occurring along the obturation strip, which are formed due to the imperfection of the design of the half mask, obturator, and the head harness fixation
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Filtering dust respirator (FDR) is the main personal respiratory protective device (PRPD) of a worker from harmful and hazardous substances of the working environment: dust and aerosols. The lack of effective PRPD intensifies the growth of occupational diseases—dust bronchitis and pneumoconiosis, which are most common among workers in the mining industry [1,2,3]. The main reason is the use of PRPDs which do not provide effective protection for the worker when performing production activities [4,5]
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