Binder Application and Drying in Wetlaid Lines
topic
Wetlaid nonwoven binder systems apply chemical binder through wet-end addition of fibre bonding agents during slurry preparation or through size press, saturation, or spray application after forming and initial drying, with drying in multi-cylinder steam dryers or through-air ovens removing forming water and curing the binder to provide final web cohesion, with binder chemistry and application method governing mechanical performance, chemical resistance, and biodegradability.
Role
Provides the bonding strength required for wet and dry handling of wetlaid nonwovens through chemical or thermal binder application that must be compatible with the fibre type and application requirements, with wet-end chemistry offering the most uniform binder distribution through slurry addition while topical application provides surface preferential bonding that preserves web porosity for filtration applications requiring maximum air permeability.