The role of the top layer is to convey liquid quickly to the absorbent core. It is typically made from thermally-bonded non-woven fabric of hydrophobic fiber or cellulosic fibers (US Patent 6,548,731).

Tensile strength: 25-50 MPa (long direction) and 10-40 MPa (short direction).

Thickness: 0.1-1.0 mm

Density: 0.1-1.0 g/m^2

The absorbent core is typically made from fluffed hydrophilic fibers that are cellulosic in origin.

Water absorption capacity: > 6g water/g

Lateral wicking rate: XX

Water retention capacity: XX

The backsheet consists of a material capable of preventing any bodily fluids from leaking. The material must be flexible, water insoluble, hydrophobic, non-permeable, and non-toxic. Common materials include polyethylene, polypropylene, polyester, or polyurethane or Natur-Tec BF703B. (US Patent 10,738,790).

Tensile strength: 10-40 MPa

Water vapor transmission: 250-450 mLm^2/day

Thickness: 0.1-1.0 mm

Density: 0.1-1.0 g/m^2