The non-woven fabricprinting process can mainly adopt two process methods, online dyeing and offline dyeing.

On-line dyeing process: loose fiber → open cotton → carding → spunlace → foam dyeing (adhesive, paint and other additives) → drying → winding. Among them, the advantage of using foam dyeing is that it can save energy, but it has the disadvantage of uneven dyeing.

Off-line dyeing process: Spunlace nonwovens → cloth feeding → padding (adhesives, coatings and other additives) → pre-drying → tentering drying or drum drying → winding.

Non-woven printing process:

When printing, the color paste made of paint, adhesive, corresponding additives, and water needs to be added with a thickener to increase the viscosity, and the color paste is printed on the non-woven fabric by a roller printing machine, and is bonded during the drying process. The agent self-crosslinks and fixes the colorant on the non-woven fabric.

Taking the non-woven fabric production line as an example, the online printing process is: loose fiber → open cotton → carding → spunlace → dipping → printing (paint and additives) → drying → winding. Among them, the dipping process can use the padding (two-dipping and two-rolling) method, or the foam dipping method. There are also factories that do not have this process. This is mainly determined by the customer's product quality requirements and application areas.

The printing process mainly adopts the roller printing method. The rotary screen printing is not suitable for non-woven fabric printing because it is easy to block the mesh. There are also a few decorative non-woven fabrics that use the transfer printing method, but the printing cost of this method is high. Fiber raw materials have certain requirements.

With the method of paint and binder, the dyeing/printing process is short, high in efficiency, and low in cost, which can fully meet the requirements of related application fields. Moreover, this method is simple and easy to implement, is suitable for various fibers, has low energy consumption, and is beneficial to environmental protection. Therefore, except for some special products, most non-woven fabric production plants use paint dyeing/printing methods.

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