Textile Glossary

Slot die coater (wide-slot die)

Definition

A device used to apply lamination coatings. The die extends across the full width of the textile, and the coating compound is discharged through a slot.

Use in the textile industry

Slot die coaters are used in the textile industry to apply adhesives, coating compounds, or laminating media uniformly and without interruption across the full fabric width. Typical applications include the production of composite materials, laminated nonwovens, and coated technical textiles. Slot application enables a uniform basis weight of the applied compound and is particularly suited to continuous production processes.

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Frequently asked question

With a slot die coater, the coating compound is discharged directly through a slot across the full fabric width without any mechanical transfer element such as a roll contacting the material. Roll coating, by contrast, transfers the medium onto the substrate via a rotating roll, which offers different adjustment options for coat weight and viscosity. Slot die coaters generally allow a more precise, contactless application with a consistent coating thickness.

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