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Investigating the Continuing Performance of Firefighter Hoods Following On-The-Job Exposures.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Investigating the Continuing Performance of Firefighter Hoods Following On-The-Job Exposures./
作者:	Kasebi, Arash.
面頁冊數:	1 online resource (185 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-06, Section: B.
Contained By:	Dissertations Abstracts International84-06B.
標題:	Firefighters. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30167932click for full text (PQDT)
ISBN:	9798358406018

Investigating the Continuing Performance of Firefighter Hoods Following On-The-Job Exposures.
Kasebi, Arash.

Investigating the Continuing Performance of Firefighter Hoods Following On-The-Job Exposures. - 1 online resource (185 pages)

Source: Dissertations Abstracts International, Volume: 84-06, Section: B.

Thesis (Ph.D.)--North Carolina State University, 2022.

Includes bibliographical references

The duties and responsibilities involved in the profession of firefighting make it an inherently dangerous occupation. Operating in firefighting environments requires intensive training and heavy-duty equipment that allows firefighters to efficiently and safely extinguish fires. This equipment includes personal protective equipment designed to protect firefighters while operating in thermal environments that are immediately dangerous to life and health. The clothing worn by firefighters, also known as turnout gear, continually evolves with the threats associated with firefighting. These threats include fire-borne carcinogens that can enter the body through inhalation, dermal absorption, and ingestion. Over the past few decades, turnout gear has seen significant improvements in protecting firefighters from these carcinogens. Innovations associated with firefighter protective hoods, however, have not kept up with other turnout gear elements like the coat and pants. This is especially the case for protection against carcinogenic particulates sourced from the fireground.In response to hood-related concerns voiced by the fire service community, turnout gear manufacturers have begun incorporating particulate-blocking technologies within protective hoods to limit dermal absorption of fireground contaminants. Due to their short track record and lack of research, firefighter hoods should be investigated for their continuing performance and safety. This research examined how firefighter hoods, both traditional and particulate-blocking, retain their performance characteristics after being exposed to on-the-job stressors. These stressors include ultraviolet radiation from the sun, laundering procedures, donning/doffing, and thermal exposures. After being exposed, hood samples were evaluated for thermal protection, particulate filtration efficiency, bursting strength, and fabric properties.Experiments were organized into three separate phases to thoroughly evaluate the protective hood's continuing performance after on-the-job exposures. Phase 1 observed how individual types of on-the-job exposures can affect hood performance and durability using roll materials. Phase 2 assessed the particulate filtration efficiency of commercially available hoods after being exposed to cycles of laundering and donning/doffing. Phase 3 systematically assessed how combinations of laundering, donning/doffing, and thermal exposures affect the overall performance of particulate-blocking hoods. During all phases, exposure treatments and evaluations were assessed for their practicality and relevance to predicting a hood's continuing performance.During Phase 1 experiments, direct ultraviolet (UV) light exposures had a significant impact on the bursting strength of hood fabrics, especially if fabrics were constructed from 100% meta-aramid or fiber blends containing oxidized polyacrylonitrile. Laundering did not appear to negatively affect fabric strength but did cause fabric fibrillation in some hood samples. FR viscose-containing samples saw noticeable reductions in burst strength after exposure to every conducted thermal treatment. In Phase 2, particulate-blocking hoods collectively maintained their particulate filtration efficiency when tested in fabric areas. The seam areas of particulateblocking hoods, on the other hand, experienced suboptimal levels of filtration efficiency if the hoods contained PTFE-based particulate-blocking layers. After fluorescent aerosol screening tests, particulate-blocking hoods showed their merit in preventing aerosol ingress if the hood was removed from the wearer using an "over-the-head" doffing method.All Phase 3 treatments appeared to have a detrimental effect on the fabric strength of outer fabrics for most hood samples. After undergoing hood inspections and automated filter tests, seams of PTFE-based particulate blocking hoods exhibited significantly lower filtration efficiencies than in fabric areas of the same hoods. When tested for subflash radiant protective performance, hoods generally scored higher protection levels when tested in the spaced configuration that mimics air gaps between the garment and the wearer's skin. To build upon the findings of this research, future efforts should be devoted to improving particulate filtration efficiency in hood seams, optimizing methodology and instrumentation to realistically and reliably mimic on-the-job exposures, and improving the overall performance of particulateblocking hoods.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798358406018Subjects--Topical Terms:

823263
Firefighters.
Index Terms--Genre/Form:

542853
Electronic books.

Investigating the Continuing Performance of Firefighter Hoods Following On-The-Job Exposures.
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520 $a The duties and responsibilities involved in the profession of firefighting make it an inherently dangerous occupation. Operating in firefighting environments requires intensive training and heavy-duty equipment that allows firefighters to efficiently and safely extinguish fires. This equipment includes personal protective equipment designed to protect firefighters while operating in thermal environments that are immediately dangerous to life and health. The clothing worn by firefighters, also known as turnout gear, continually evolves with the threats associated with firefighting. These threats include fire-borne carcinogens that can enter the body through inhalation, dermal absorption, and ingestion. Over the past few decades, turnout gear has seen significant improvements in protecting firefighters from these carcinogens. Innovations associated with firefighter protective hoods, however, have not kept up with other turnout gear elements like the coat and pants. This is especially the case for protection against carcinogenic particulates sourced from the fireground.In response to hood-related concerns voiced by the fire service community, turnout gear manufacturers have begun incorporating particulate-blocking technologies within protective hoods to limit dermal absorption of fireground contaminants. Due to their short track record and lack of research, firefighter hoods should be investigated for their continuing performance and safety. This research examined how firefighter hoods, both traditional and particulate-blocking, retain their performance characteristics after being exposed to on-the-job stressors. These stressors include ultraviolet radiation from the sun, laundering procedures, donning/doffing, and thermal exposures. After being exposed, hood samples were evaluated for thermal protection, particulate filtration efficiency, bursting strength, and fabric properties.Experiments were organized into three separate phases to thoroughly evaluate the protective hood's continuing performance after on-the-job exposures. Phase 1 observed how individual types of on-the-job exposures can affect hood performance and durability using roll materials. Phase 2 assessed the particulate filtration efficiency of commercially available hoods after being exposed to cycles of laundering and donning/doffing. Phase 3 systematically assessed how combinations of laundering, donning/doffing, and thermal exposures affect the overall performance of particulate-blocking hoods. During all phases, exposure treatments and evaluations were assessed for their practicality and relevance to predicting a hood's continuing performance.During Phase 1 experiments, direct ultraviolet (UV) light exposures had a significant impact on the bursting strength of hood fabrics, especially if fabrics were constructed from 100% meta-aramid or fiber blends containing oxidized polyacrylonitrile. Laundering did not appear to negatively affect fabric strength but did cause fabric fibrillation in some hood samples. FR viscose-containing samples saw noticeable reductions in burst strength after exposure to every conducted thermal treatment. In Phase 2, particulate-blocking hoods collectively maintained their particulate filtration efficiency when tested in fabric areas. The seam areas of particulateblocking hoods, on the other hand, experienced suboptimal levels of filtration efficiency if the hoods contained PTFE-based particulate-blocking layers. After fluorescent aerosol screening tests, particulate-blocking hoods showed their merit in preventing aerosol ingress if the hood was removed from the wearer using an "over-the-head" doffing method.All Phase 3 treatments appeared to have a detrimental effect on the fabric strength of outer fabrics for most hood samples. After undergoing hood inspections and automated filter tests, seams of PTFE-based particulate blocking hoods exhibited significantly lower filtration efficiencies than in fabric areas of the same hoods. When tested for subflash radiant protective performance, hoods generally scored higher protection levels when tested in the spaced configuration that mimics air gaps between the garment and the wearer's skin. To build upon the findings of this research, future efforts should be devoted to improving particulate filtration efficiency in hood seams, optimizing methodology and instrumentation to realistically and reliably mimic on-the-job exposures, and improving the overall performance of particulateblocking hoods.
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650 4 $a Fires. $3 1613440
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650 4 $a Protective clothing. $3 651955
650 4 $a Single family. $3 3681522
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650 4 $a Injuries. $3 3563044
650 4 $a Body temperature. $3 916233
650 4 $a Design. $3 518875
650 4 $a Heat. $3 573595
650 4 $a Skin. $3 843661
650 4 $a Research & development--R&D. $3 3554335
650 4 $a Curing. $3 3681399
650 4 $a Ultraviolet radiation. $3 676177
650 4 $a Civil engineering. $3 860360
650 4 $a Engineering. $3 586835
650 4 $a Physiology. $3 518431
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