Flammability Measurement and Thermal Aging of Chemical Protective Suit Materials.

An, Seung Kook

doi:10.2115/fiber.55.10_464

Cited by 3 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tear strength was also assessed since it has been reported to be more sensitive to heat aging than tensile strength in a study involving various laminate‐type fabrics 14. A sample similar to the ASTM D 5587 standard test method15 but with slightly scaled‐down dimensions was used.…”

Section: Methodsmentioning

confidence: 99%

Effect of thermal aging on the mechanical and barrier properties of an e‐PTFE/Nomex® moisture membrane used in firefighters' protective suits

Aidani

Dolez

Vu‐Khanh

2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

Moisture membranes play a key role in high performance protective clothing by preventing outside water to get in while allowing the human body to perspire properly. However, these membranes are confronted to high environmental constraints, in particular within firefighters' protective clothing. The resulting aging effect may lead to modifications of their performances, for example their mechanical or barrier properties. In this study, the thermal aging of an e-PTFE/NomexV R moisture membrane was carried out at five temperatures between 190 and 320 C. The effect of aging on the mechanical performance was assessed by tensile tests and trapezoid tear strength measurements. Variation in the moisture membrane water vapor permeability due to aging was also studied. Large modifications in the membrane mechanical properties as a result of thermal aging were recorded. It was associated in part with a degradation of the NomexV R fibers. The membrane water vapor permeability was observed to decrease with aging time below 220C while values larger than those corresponding to the unaged material were measured above that temperature. This was possibly related to the occurrence of two competing phenomena relative to water vapor permeability: closure of pores in the e-PTFE laminate and creation of cracks and holes. These results show that the aging of the moisture membrane must be considered carefully while estimating the service life of protective clothing.

show abstract

Section: Methodsmentioning

confidence: 99%

Effect of thermal aging on the mechanical and barrier properties of an e‐PTFE/Nomex® moisture membrane used in firefighters' protective suits

Aidani

Dolez

Vu‐Khanh

2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…11 Tensile strength is a common index to represent the mechanical properties of fabrics. 12 An 13 pointed out that when fabric was exposed to both convection and conduction heat sources, the latter reduced the tensile strength of the fabric even less. Rossi et al 14 showed that when the heat flux was the same, the effect of convective heat exposure on the tensile strength was greater than that of radiant heat exposure.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Thermal degradation behavior of flame-resistant fabrics exposed to fires: effect of air gap type and thickness

Zhang

Tian

Wang

et al. 2022

Textile Research Journal

View full text Add to dashboard Cite

The thermal degradation of flame-resistant fabrics reduces the protective ability of clothing and affects firefighters’ safety. Making clear the influence factors of fabric thermal degradation is important for predicting and prolonging the service life of fire-protection clothing. Experiments were conducted for open and sealed air gaps with different thicknesses under flame exposure. The degradation the of outer shell fabric was evaluated by observing the variation in fabric morphology, mass loss and tensile strength of specimens after heat exposure. The influence mechanism of the type and thickness of the air gap on thermal degradation was analyzed by the surface temperature curve and thermal stability of the fabric, as well as the microstructure of the fiber. The results indicated that the type and thickness of the air gap have a significant effect on thermal degradation, and a more serious negative effect was observed under the condition of an open air gap. After being exposed to heat fluxes of 30 and 50 kW/m2 for 40 s, the mass loss rates were 1.8% and 3.3% higher than those of the sealed air gap, and the tensile strength retention rates were 9.1% and 10.1% lower on average, respectively. Air gap type and thickness affected the heat storage and heat transfer efficiency in the fabric system by changing the heat transfer mode. The decomposition and fracture of the fabric were affected, which made the flame-resistant fabrics show different degrees of thermal degradation.

show abstract

Photochemical aging of an e-PTFE/NOMEX® membrane used in firefighter protective clothing

Aidani

Nguyen-Tri

Malajati

et al. 2013

Polymer Degradation and Stability

View full text Add to dashboard Cite

Flammability Measurement and Thermal Aging of Chemical Protective Suit Materials.

Abstract: Test methods were described for measuring

Cited by 3 publications

References 3 publications

Effect of thermal aging on the mechanical and barrier properties of an e‐PTFE/Nomex® moisture membrane used in firefighters' protective suits

Effect of thermal aging on the mechanical and barrier properties of an e‐PTFE/Nomex® moisture membrane used in firefighters' protective suits

Thermal degradation behavior of flame-resistant fabrics exposed to fires: effect of air gap type and thickness

Photochemical aging of an e-PTFE/NOMEX® membrane used in firefighter protective clothing

Contact Info

Product

Resources

About