The hydroentanglement system can accept a dry or wet formed continuous
web. The HET system can be used on a single layer or dual layer
web. After the web has been hydroentangled, it can be further treated
by pressing, drying, and winding.
Fine water jets directed at the moving web accomplish the hydraulic
entanglement of the web. The web is carried on a forming fabric
that is supported by vacuum dewatering boxes.
Entanglement occurs when the water jets reposition the fibers in
the web into open pattern arrangements. The number of high pressure
water jets, size of the water jet orifices, and operating pressure
of the water jets can control the degree of fiber processing.
The design of conveying fabric has a great influence on the final
sheet properties and appearence. A fine forming fabric will result
in close patterned web that is strong and drapable. A coarse forming
fabric will result in an open patterned web that will take on the
appearance of the forming fabric.
The hydroentanglement process can impart textile-like properties
to a nonwoven web (softness, drape and bulk) as well increase the
strength and elongation of the web.