When the coating machine for nonwoven is used, its extrusion coating mainly refers to coating a molten mesh of synthetic resin onto the base material.
It is a versatile coating technology for economical applications in a variety of plastics, especially polyethylene, cardboard, corrugated fiberboard, paper, aluminum foil, cellulose, nonwovens or plastic films.
The coating of coating machine for nonwoven is mainly used in the process of making the extrusion coating, including the process of extruding the resin from the slot die directly onto the mobile network at a temperature of up to 320 ° C,
The web can then be passed through a nip of a rubber covered pressure roll and a chrome plated chill roll by a coater.
The latter cools the molten film back to the solid state and imparts the desired finish to the plastic surface.
The web is typically much faster than the resin is extruded from the mold, resulting in a coating thickness to speed ratio that is proportional to the slit gap.
The lamination of a coating machine for nonwoven is a similar process in its operation, except that the extruded hot melt resin acts as a bonding medium for the second web of material.
Co-extrusion is also a similar process, but two or more extruders are attached to a single die where the separately extruded melts are put together and finally extruded into a multilayer film.