Mechanical properties of breathable waterproof fabrics with seaming and sealing processes

Jeong, Won Young; An, Seung Kook

doi:10.1007/bf02875531

Cited by 12 publications

(9 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Comparative analysis between experimental parameters of seam strength and resistance to water penetration and initial characteristics of fabrics MB1 and MB2 also determination of seam efficiency according to each optimization criterion are presented in Tables 3 and 4. Comparing test results presented in Tables 3 and 4 with other researchers' data [7,11], it was determined that seam strength after sealing process of nonwoven fabrics with membrane and the derivative index -efficiency of seam strength -were different in both directions (longitudinal and cross), as well as test results achieved by researchers [7,11] of three-layer laminated fabrics with knitted and woven base layers. Results of this investigation confirm that seam strength of both fabrics is lower in cross direction than in longitudinal.…”

Section: Seam Efficiencymentioning

confidence: 73%

“…Table 1 provides basic information about the tested fabrics. Based on test results of water proof breathable fabrics evaluation [11], that showed the differences between seams tensile properties (after sealing process) in both directions -parallel and perpendicular -to the seam line, analogous specimens (as in [11]) for seams preparation in two directions were selected for our tests. Specimens for the seam tests were prepared from nonwoven textile fabrics cut in longitudinal direction.…”

Section: Methodsmentioning

confidence: 99%

“…Investigations of mechanical properties of fabrics and seams in different fabrics direction, which usually are during wear processes of the clothing, are presented in research [8 -10]. Authors of study [11] investigated that in both of parallel and perpendicular (warp and weft) directions tensile characteristics of seams of breathable waterproof fabrics were significantly changed with variability of seaming and sealing processes condition. Data obtained from other researchers' works showed lack of investigations concerning evaluation of seams mechanical properties in different seam directions, despite the fact that constructional seams are affected by multiaxial deformations.…”

Section: Introduction *mentioning

confidence: 99%

See 2 more Smart Citations

Investigation of Sealed Seams Properties of Moisture Barrier Layer in Firefighters Clothing

Grinevičiūtė¹,

Valasevičiūtė²,

Narvilienė³

et al. 2014

View full text Add to dashboard Cite

This study presents an experimental investigation of sealed seams performance of two types of nonwoven fireproof fabrics laminated with bicomponent and hydrophilic membrane, which are used for moisture barrier layer in firefighters clothing. Seam strength in longitudinal and cross direction and resistance to water penetration were determined for investigation of quality of sealed seams with thermoplastic polyurethane tape. Determining the efficiency of sealed seams, optimal sealing parameters (temperature, sealing speed and quill pressure) were identified in order to achieve good seam performance. The experimental relations and empirical equations for the seam strength and resistance to water penetration determined in this research can be used to predict efficiency of seams quality applying different parameters of seam sealing process.

show abstract

Section: Seam Efficiencymentioning

confidence: 73%

Section: Methodsmentioning

confidence: 99%

Section: Introduction *mentioning

confidence: 99%

See 1 more Smart Citation

Investigation of Sealed Seams Properties of Moisture Barrier Layer in Firefighters Clothing

Grinevičiūtė¹,

Valasevičiūtė²,

Narvilienė³

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Then sealing tape, also containing PTFE, is applied to ensure that the sewn seam is waterproof. (6) During the traditional sewing of the PTFE fabric there is a low potential for airborne particle production. However, during the sealing of the sewn seams, there is a possibility of exposure to incidental nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Airborne Nanoparticle Concentrations in the Manufacturing of Polytetrafluoroethylene (PTFE) Apparel

Vosburgh

Boysen

Oleson³

et al. 2011

Journal of Occupational and Environmental Hygiene

View full text Add to dashboard Cite

One form of waterproof, breathable apparel is manufactured from polytetrafluoroethylene (PTFE) membrane laminated fabric, using a specific process to seal seams that have been sewn with traditional techniques. The sealing process involves applying waterproof tape to the seam by feeding the seam through two rollers while applying hot air (600°C). This study addressed the potential for exposure to particulate matter from this sealing process, by characterizing airborne particles in a facility that produces over 1,000 lightweight PTFE rain jackets per day. Aerosol concentrations throughout the facility were mapped, breathing zone concentrations were measured, and hoods used to ventilate the seam sealing operation were evaluated. The geometric mean (GM) particle number concentrations were substantially greater in the sewing and sealing areas (67,000 and 188,000 particles cm −3 ) compared to that measured in the office area (12,100 particles cm −3 ). Respirable mass concentrations were negligible throughout the facility (GM=0.002 mg m −3 in the sewing and sealing areas). The particles exiting the final discharge of the facility's ventilation system were dominated by nanoparticles (number median diameter = 25 nm; geometric standard deviation of 1.39). The breathing zone particle number concentrations of the workers who sealed the sewn seams were highly variable and significantly greater when sealing seams than when conducting other tasks (p<0.0001). The sealing workers' breathing zone concentrations ranged from 147,000 particles cm −3 to 798,000 particles cm −3 , and their seam responsibility significantly influenced their breathing zone concentrations (p=0.03). The finding that particle number concentrations were approximately equal outside the hood and inside the local exhaust duct indicated poor effectiveness of the canopy hoods used to ventilate sealing operations.

show abstract

“…In the manufacturing process, pieces of fabric are joined using traditional sewing techniques. Then sealing tape, also containing PTFE, is applied to ensure that the sewn seam is waterproof (Jeong & An, 2004). During the traditional sewing of the PTFE fabric there is a low potential for airborne particle production.…”

Section: Introductionmentioning

confidence: 99%

Use of direct-reading instruments for measuring airborne nanoparticles in the workplace

Vosburgh¹

View full text Add to dashboard Cite

This work strived to increase knowledge of assessing airborne nanoparticles in the workplace by characterizing nanoparticle concentrations in a workplace using directreading instruments, evaluating a DC2000CE diffusion charger, and the creation of a personal diffusion battery (pDB). Direct-reading instruments were used with aerosol mapping and task monitoring to evaluate airborne nanoparticle concentrations in an apparel company that produces waterproof jackets composed of polytetrafluoroethylene membrane laminated fabric. Jacket production required that sewn seams be sealed with waterproof tape applied with hot air (600°C). Particle number concentrations were greater in the sewing and sealing areas than the office area while respirable mass was negligible throughout the facility. The breathing zone particle number concentrations of the workers who sealed the sewn seams were highly variable and significantly greater when sealing seams than when conducting other tasks (p<0.0001). The effectiveness of the canopy hoods used to ventilate sealing operations was poor. These measurements support the idea that work places where hot processes are conducted may have substantially greater concentrations of airborne nanoparticles than background measurements even with control measures in place. Laboratory tests were conducted to evaluate a commercially available diffusion charger, the DC2000CE, that measures nanoparticle surface area concentration. The surface area concentrations of unimodal and multimodal polydispersed aerosols measured by the DC2000CE were less than the surface area concentrations measured by the reference instruments. The differences in results were attributed to a difference of measuring active versus geometric surface area concentration and the design of the DC2000CE. The maximum measurable active surface area concentration (2,500 mm 2 m-3) was found to be greater than the manufacturer stated maximum (1000 mm 2 m-3). Moving or vibrating a DC2000CE while taking measurements can cause v ABSTRACT This work strived to increase knowledge of assessing airborne nanoparticles in the workplace by characterizing nanoparticle concentrations in a workplace using directreading instruments, evaluating a DC2000CE diffusion charger, and the creation of a personal diffusion battery (pDB). Direct-reading instruments were used with aerosol mapping and task monitoring to evaluate airborne nanoparticle concentrations in an apparel company that produces waterproof jackets composed of polytetrafluoroethylene membrane laminated fabric. Jacket production required that sewn seams be sealed with waterproof tape applied with hot air (600°C). Particle number concentrations were greater in the sewing and sealing areas than the office area while respirable mass was negligible throughout the facility. The breathing zone particle number concentrations of the workers who sealed the sewn seams were highly variable and significantly greater when sealing seams than when conducting other tasks (p<0.0001). The effectiveness of the canopy hoo...

show abstract

Mechanical properties of breathable waterproof fabrics with seaming and sealing processes

Cited by 12 publications

References 6 publications

Investigation of Sealed Seams Properties of Moisture Barrier Layer in Firefighters Clothing

Investigation of Sealed Seams Properties of Moisture Barrier Layer in Firefighters Clothing

Airborne Nanoparticle Concentrations in the Manufacturing of Polytetrafluoroethylene (PTFE) Apparel

Use of direct-reading instruments for measuring airborne nanoparticles in the workplace

Contact Info

Product

Resources

About