Development of high‐absorbent light‐weight sanitary napkin

Abstract

This article presents a method of preparing the absorbent core for an ultrathin sanitary napkin using super absorbent fiber (SAF) and viscose fiber blends with varying SAF percentages and mass per unit area (g/m2). The SAF/viscose blended carded webs were sandwiched between two layers of nonwoven fabric to integrate and encapsulate it. The prepared napkin samples showed significantly better rates of absorption for saline solution even though the glass tube wicking (gravimetric) test gave only comparable results. The saturation absorption of the core also follows a definite trend, dependent on two variables, i.e., mass per unit area (g/m2) of the core web and proportion of SAF in the core web. Based on the results, the absorption of the core has been optimized and equations have been developed for prediction of the absorption of the core from mass per unit area and the proportion of SAF in the core web. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008

Properties of composite nonwovens

“…The liquid spreading length was found to be predicted reasonably well by the model developed by Kim and Pourdeyhimi (2003) based on the expression given for the directional permeability by Mao and Russel (2000). Das et al (2008) reported a method of preparation of an absorbent core for ultrathin sanitary napkins using blends of superabsorbent fi bres and viscose fi bres. The superabsorbent/viscose fi bre blended carded webs were sandwiched between two layers of nonwoven fabrics, one made of parallel-laid viscose fi bres and the other prepared from random laid viscose fi bres.…”

pH-responsive carboxymethylcellulose-g-poly(sodium acrylate)/polyvinylpyrrolidone semi-IPN hydrogels with enhanced responsive and swelling properties

“…[1][2][3] Superabsorbents are particular 3-D network hydrophilic functional polymer materials which can absorb and hold huge volume of aqueous liquids but do not dissolve. Owing to the unique advantages, superabsorbents have found extensive application in various fields such as agriculture, 4,5 hygienic products, 6 wastewater treatment, 7-9 dehydrating agent 10 and drugdelivery systems, [11][12][13] etc. Currently, most of the superabsorbents used in practice are petroleum-based synthetic polymer with high production cost and poor environmental friendly properties, 14 and thus new types of multi-component superabsorbents derived from naturally available polysaccharides and facile synthesis methods are desired.…”

A pH-sensitive composite hydrogel based on sodium alginate and medical stone: Synthesis, swelling, and heavy metal ions adsorption properties

“…(4). 37 δ mix = δ 1 ψ 1 + δ 2 ψ 2 (4) where ψ 1 and ψ 2 are the volume fraction for the two components, and δ 1 and δ 2 are the solubility parameters of each component. The δ values of methanol, acetone, DMSO, ethylene glycol and glycerol are 14.5, 9.9, 14.5, 14.6 and 16.5 (cal/cm 3 ) 1/2 , respectively, which is clearly smaller than 23.4 of water.…”

“…1 By virtue of the unique advantages, hydrogels become one of the upcoming classes of polymerbased materials and have found extensive applications in many fields, such as water-saving materials for agriculture, 2,3 hygienic products, 4 drug-delivery systems, 5-7 wastewater treatment, [8][9][10][11][12] dehydrating agent, 13 tissue engineering, 14 and biosensor, 15 etc. Thus far, numerous hydrogel materials have been developed by using various raw materials and methods.…”