Abstract
Through-air bonding is one of the thermal methods of bonding fibers in the production of nonwoven webs, and they are widely used in disposable sanitary products, especially in the acquisition distribution layer of diapers. In this article, the through-air bonded nonwoven fabrics were successfully prepared by ethylene–propylene fibers (polyethylene and polyethylene terephthalate (PE/PET)) and eccentric hollow fibers (PE/PET). The influence of process parameters such as the ratio of fibers was discussed for performance of through-air bonded nonwoven. Besides, the surface morphology, physical characteristics (thickness and breaking strength), air permeability, moisture permeation, liquid permeability, and absorption properties test of the nonwoven fabrics were investigated. The results demonstrated that the addition of eccentric hollow fiber increased the permeability, mechanical property, and the core absorption effect of the through-air bonded nonwovens. According to the results, the fabrics made of eccentric hollow fibers have good absorption and liquid transfer characteristics; the permeation time and wetback were found to be 0.85 s and 0.03 g, respectively.
Highlights
Nonwoven fabrics are specific types of porous structure composed of fibers that are bonded together by mechanical, thermal, or chemical agents
The main objective of this study was to improve the performance of Acquisition distribution layer (ADL) materials made by ES fiber (polyethylene and polyethylene terephthalate (PE/PET)) and eccentric hollow fiber (PE/PET) bonded by hot air
It was found that the absorption and penetration performances of ADL were greatly improved by the permanent crimp eccentric hollow fiber structure
Summary
Nonwoven fabrics are specific types of porous structure composed of fibers that are bonded together by mechanical, thermal, or chemical agents. The principle of through-air bonded nonwoven material is that most of the high-molecular polymers are thermoplastic, they will soften and melt when heated to a certain temperature, become viscous fluids with certain flow properties, and re-solidified after cooling.[4] Bicomponent fibers consist of core and sheath part with two different melting points. They are widely used in the through-air bonding process for bonded nonwoven production. The core part of the bicomponent fiber has a high melting point and provides structural rigidity of the web, and the sheath of the fiber has a low melting point and melts and bonds the fibers together.[5,6]
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