Double-sided anisotropic non-woven fabric and preparation

Abstract

The present invention discloses a double-sided anisotropic non-woven fabric, which includes: a base layer having opposite first and second surfaces, and the base layer is a three-dimensional network structure formed by interweaving natural fibers and regenerated fibers through wet laying and hydroentangling processes; a reinforcing layer provided on the first surface of the base layer, and the reinforcing layer is mainly formed by polyvinyl alcohol (PVA); a water-repellent layer provided on the second surface of the base layer, and the water-repellent layer is mainly formed by polyhydroxyalkanoate (PHA), so that the single non-woven fabric simultaneously has the double-sided anisotropic functions of hydrophilic reinforcement and water-repellent protection. In addition, this non-woven fabric also has dispersibility and complete biodegradability, and is particularly suitable for environmentally friendly disposable products such as food pads that require distinguishing wet and dry functions. The present invention also provides a preparation method for preparing this non-woven fabric.