Cheberyachko S.I., Cheberyachko Yu.I., Radchuk D.I., Stolbchenko O.V., Klimov D. G. Research of the insulating properties of respirator half mask

Details

Parent Category: Geo-Technical Mechanics, 2019

Category: Geo-Technical Mechanics, 2019, Issue 149

Geoteh. meh., 2019, 149, 223-232

https://doi.org/10.15407/geotm2019.149.223

 RESEARCH OF THE INSULATING PROPERTIES OF RESPIRATOR HALF MASK

¹Cheberyachko S.I., ¹Cheberyachko Yu.I., ¹Radchuk D.I.,¹Stolbchenko O.V., ¹Klimov D. G.

¹ National Technical University «Dnipro Polytechnic» MES of Ukraine

UDC 614.89

Language: Ukrainian

Annotation.

The current normative documents on labour protection set sanitary and hygienic norms for dust content in air of the working areas. When it is impossible to meet these norms, then levels of the dust burden is determined for the miners in order to regulated duration of their work in conditions dangerous by dust factor.  In this case, miners are provided with facilities for individual defense of their respiratory apparatus, i.e. dust masks. Purpose of the study was to study insulating properties, including aerosol penetration and suction coefficients of the dust masks at different force of the headband straps tightening.  Method of the research included experimental test of half masks on a specially created laboratory bench in order to determine penetration and suction coefficients of the half mask with the help of test spray of sodium chloride. Relationship between insulating properties of the half masks and the coefficients of aerosol penetration and suction into inside space of the respirators was determined with taking into account influence of the force of the headband straps tightening. It is confirmed that coefficient of absorption of the respirator decreases with increased force of tightening, but due to the unevenness of the clamping forces in certain areas of the half mask, gaps are formed, which, on the contrary, deteriorate protective properties of respirators. It is established that coefficient of aerosol suction into inside space of the mask of the respirator depends on the location of points of the headband fixation and direction of the clamping force created by it, which produces a torque action on the half mask, and creates a certain ratio of tangle and normal forces applied to the face. These forces, during the half mask motion, lead to the mask slipping and form gaps, through which aerosol is sucked into inside space of the mask. It is confirmed that coefficient of absorption of the respirator decreases with increased force of tightening, but, due to the unevenness of the clamping forces in certain areas of the half mask, gaps are formed, which, on the contrary, deteriorate protective properties of the respirators. Practical importance of this research consists in determining protective efficiency of the half masks with different headband fixations.

Keywords:

dust respirator, insulating properties of half mask, aerosol penetration and suction coefficient

References

1. DNAOP 0.00-1.04-07 Pravyla vyboru ta zastosuvannya zasobiv indyvidualnogo zakhystu organiv dykhannya, vydanyi Derzhavnym komitetom Ukrainy z promyslovoi bezpeky, okhorony pratsi ta girnychogo naglyadu № 331 vid 28.12.2007 r. [DNAOP 0.00-1.04-07 Rules for the selection and use of respiratory protection issued by the State Committee of Ukraine for Industrial Safety, Labor Protection and Mining Supervision № 331 by 28.12.2007] (2007)

2. DSTU EN 529:2006 Sredstva individualnoy zashchity organov dykhaniya. Rekomendatsii otnositelno vybora, ispolzovaniya, ukhoda I obslezhivaniya. Instruktsiya (EN 529:2005, IDT) [DSTU EN 529:2006 Respiratory protection. Recommendations for selection, use, care and maintenance. Instruction. (EN 529:2005, IDT)].

3. Vitrychak, V. Savina, O.L Klimenko, KV Gaidash, I.A and Kurchanova V.S. (2012) "Influence of coal mines production factors on the miner's occupational health”, Ukrainian Journal of Clinical and Laboratory Medicine. Vol. 7, No. 1.  pp. 194-198.

4. Nancy Bollinger (2004), NIOSH Respirator Selection Logic.NIOSH, Cincinnati, OH: National Institute for Occupational Safety and Health, 32 p. (DHHS (NIOSH) Publication No 2005-100).

5. Luinenburg, D.M., Mullins, E.H., Danisch, S.G. and Nelson T.J. (2003), "Evaluation of a Quantitative Fit Testing Method for N95 Filtering Facepiece Respirators", American Industrial Hygiene Association Journal, 2003, Vol. 64, №4, Р. 480-486.

https://doi.org/10.1080/15428110308984843

6. Zhuang, Z., Coffey, C.C., Jensen; P.A., Campbell; D.L., Lawrence; R.B. and Myers, W.R. (2004), "Correlation Between Quantitative Fit Factors and Workplace Protection Factors Measured in Actual Workplace Environments at a Steel Foundry", American Industrial Hygiene Association Journal, Vol. 64, № 6, pp. 730 - 739.

https://doi.org/10.1080/15428110308984867

7. Holton P.M., Tackett, D.L. and Willeke, K. (1987), "Particle Size-Dependent Leakage and Losses of Aerosols in Respirators", American Industrial Hygiene Association Journa, no. 48 (10), pp. 848 - 854.

https://doi.org/10.1080/15298668791385697

8. Viscusi, D.J., M.S. Bergman, D.A. Novak [et al.] (2011), "Impact of three biological decontamination methods on filtering facepiece respirator fit, odor, comfort, and donning ease", J. Occup. Environ. Hyg, . pp. 426-436..

https://doi.org/10.1080/15459624.2011.585927

9. Kaptsov, V.A. and Chirkin, A.V. (2015), "On the evaluation of the effectiveness of respiratory protection", Security in the Technosphere, no. 5, pp. 7 - 14.

https://doi.org/10.12737/16958

10. Chic, L.L  (1973), “Biomechanics of respiration”,  In Respiratoryphysiology , Science, Moscow, SU,  pp. 19- 39.

11. Annan, А.А.,. Bidenko, V.I., Klimova, L.V. and Belinsky EE (2002), “Mathematical modeling of the design of a lightweight respirator of the type "Snowball", Trudy 1-oy Mezhdunarodnoy nauchno-prakticheskoy konferentsii “Zashchita okruzhayushchey sredy, zdorovye, bezopasnost v svarochnom proizvodstve” [Tr. 1st International. research-practice Conf. «Environmental protection, health, safety in welding production»], Odessa, UA,  September 11-13,  pp. 255–276.

About the authors:

Cheberyachko Sergiy Ivanovich,Doctor of Technical Sciences (D.Sc), Professor of the AOP Department, National Technical University "Dniprovskaya politechnika"(NTU «DP»), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Cheberyachko Yuriy Ivanovich, Candidate of Technical Sciences (Ph.D), Associate Professor of AOP Department, National Technical University "Dniprovska Politechnika", "(NTU «DP»), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Radchuk Dmutro Igorovych, Candidate of Technical Sciences (Ph.D), Associate Professor of AOP Department, National Technical University "Dniprovska Politechnika", "(NTU «DP»), Dnipro, Ukraine,

Stolbchenko Olena Volodymyrivna, Candidate of Technical Sciences (Ph.D), Associate Professor of AOP Department, National Technical University "Dniprovska Politechnika", "(NTU «DP»), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Klimov Danil, Doctoral Student National Technical University "Dniprovska Politechnika", "(NTU «DP»), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

• < Prev