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Article

Structure/Function Analysis of Nonwoven Cotton Topsheet Fabrics: Multi-Fiber Blending Effects on Fluid Handling and Fabric Handle Mechanics

1
Southern Regional Research Center, New Orleans, LA 70124, USA
2
Performance Textiles and Clothing Research Group, University of Leeds, Leeds LS2 9JT, UK
*
Author to whom correspondence should be addressed.
Materials 2018, 11(11), 2077; https://doi.org/10.3390/ma11112077
Received: 8 August 2018 / Revised: 24 September 2018 / Accepted: 9 October 2018 / Published: 24 October 2018
(This article belongs to the Special Issue Mechanical Characterization of Bio-Based Materials and Structures)
Greige cotton (GC) has attracted interest in recent years as an eco-friendly, functional fiber for use in nonwoven topsheet materials. GC imparts favorable fluid management and sensorial properties associated with urinary liquid transport and indices related to comfort in wearable incontinence nonwovens. Nonwoven GC has material surface polarity, an ambient moisture content, and a lipid/polysaccharide matrix that imparts positive fluid mechanic properties applicable to incontinence management topsheet materials. However, a better understanding of the connection between functionality and compositional aspects of molecular, mechanical, and material property relations is still required to employ structure/function relations beyond a priori design. Thus, this study focuses on the relation of key indices of material fluid and sensorial functions to nonwoven topsheet composition. Greige cotton, polypropylene, bleached cotton, and polyester fiber blends were hydroentangled at 60, 80, and 100 bar. Greige cotton polypropylene and bleached cotton were blended at ratios to balance surface polarity, whereas low percentages of polyester were added to confer whiteness properties. Electrokinetic and contact angle measurements were obtained for the hydroentangled nonwovens to assess surface polarity in light of material composition. Notably, materials demonstrated a relation of hydrophobicity to swelling as determined electrokinetically by Δζ, ζplateau, and contact angles greater than 90°. Subsequently, three blended nonwoven fabrics were selected to assess effects on fluid management properties including topsheet performance indices of rewet, strikethrough, and fluid handling (rate and efficiency of transport to the absorbent core). These materials aligned well with commercial topsheet fluid mechanics. Using the Leeds University Fabric Handle Evaluation System (LUFHES), the nonwovens were tested for total fabric hand. The results of the LUFHES measurements are discussed in light of fiber contributions. Fiber ratios were found to correlate well with improvement in softness, flexibility, and formability. This study provides insights that improves the understanding of the multifunctional properties accessible with greige cotton toward decisions valuable to selecting greige cotton as an environmentally friendly fiber for nonwoven topsheets. View Full-Text
Keywords: fluid handling; fabric handle; greige cotton; nonwovens; topsheet; rewet; strikethrough; incontinence fluid handling; fabric handle; greige cotton; nonwovens; topsheet; rewet; strikethrough; incontinence
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MDPI and ACS Style

Easson, M.; Edwards, J.V.; Mao, N.; Carr, C.; Marshall, D.; Qu, J.; Graves, E.; Reynolds, M.; Villalpando, A.; Condon, B. Structure/Function Analysis of Nonwoven Cotton Topsheet Fabrics: Multi-Fiber Blending Effects on Fluid Handling and Fabric Handle Mechanics. Materials 2018, 11, 2077. https://doi.org/10.3390/ma11112077

AMA Style

Easson M, Edwards JV, Mao N, Carr C, Marshall D, Qu J, Graves E, Reynolds M, Villalpando A, Condon B. Structure/Function Analysis of Nonwoven Cotton Topsheet Fabrics: Multi-Fiber Blending Effects on Fluid Handling and Fabric Handle Mechanics. Materials. 2018; 11(11):2077. https://doi.org/10.3390/ma11112077

Chicago/Turabian Style

Easson, Michael, Judson Vincent Edwards, Ningtao Mao, Chris Carr, David Marshall, Jianguo Qu, Elena Graves, Michael Reynolds, Andres Villalpando, and Brian Condon. 2018. "Structure/Function Analysis of Nonwoven Cotton Topsheet Fabrics: Multi-Fiber Blending Effects on Fluid Handling and Fabric Handle Mechanics" Materials 11, no. 11: 2077. https://doi.org/10.3390/ma11112077

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