Binder goes on by saturating the whole web, spraying it, applying it as foam or printing it in a pattern, and the web then passes through an oven to dry and cure. Binder type and add-on, often 10 to 40 percent of fabric weight, set strength, softness and wet performance. It is common in airlaid, highloft and some wipes and industrial fabrics, but it adds drying cost and can stiffen the hand.
Chemical bonding add-on is 22 percent on the airlaid, and wet tensile still meets the spec.
Also heard as
- resin bonding
- latex bonding
- saturation bonding
- print bonding
- spray bonding
Related terms
Latex
Water-based polymer dispersion used as the binder in chemically bonded nonwovens.
Airlaid
Web formed by suspending short fibers, mostly fluff pulp with some binder fiber, in air and depositing them on a wire.
Thermal bonding
Bonding a web by heating it so thermoplastic fibers or binder fibers soften and fuse at their crossing points.
Highloft
Low-density, thick nonwoven made for bulk and trapped air rather than strength, such as fiberfill and padding.