Effect of microstructure on properties and applications of nonwoven fabrics

This manuscript examines the pivotal influence of microstructural parameters such as bonding point distribution and fibre orientation on the properties and applications of nonwoven fabrics. Unlike traditional woven or knitted textiles, nonwovens are engineered through different forming and bonding methods, enabling unique functionalities such as absorbency, breathability, and barrier performance. These attributes drive their widespread use in healthcare, automotive, consumer goods, and construction, where requirements range from sterility and disposability to insulation and structural integrity. Microstructural orientation, governed by bonding point density and fibre alignment, critically affects mechanical strength, flexibility, durability, thermal behavior, and permeability, thereby determining end-use suitability. For instance, uniform bonding enhances tensile strength, while controlled fibre orientation imparts directional stability or isotropic barrier properties. This review synthesizes current knowledge on microstructural design strategies, explores advances in sustainable materials and manufacturing technologies, and underscores the role of microstructural engineering in optimizing nonwoven performance for evolving industrial and environmental demands.