The present invention relates to a method and apparatus for producing screen coatings containing hot-melt adhesives on flexible cloth materials such as woven, braided or non-woven fabrics, mainly used in garment
processing, by screen
embossing the paste forming a protective layer, then powdering with a
hot melt adhesive and removing excess
powder not adhering to the
embossing of the paste, characterized in that the paste is filled into the grooves of an
embossing roll or from the outside into the holes of a circular screen stencil, and then almost only this portion of the
slurry filler is applied to the cloth and immediately separated from the filler. Afterwards, powdering with the hot-melt
adhesive powder, removing excess
powder not adhering to the embossing of the paste, and also including a
drying and
sintering process. The transfer of the
slurry from the embossing roll to the coated substrate is accomplished by contact with a backing roll. In the second method, in the process of filling the holes of the screen stencil, the bottom
smooth surface on the outside of the stencil is utilized, and the
slurry is only filled from the outside without the slurry being pressed through the inside of the screen stencil. An internal doctor blade is provided, without slurry holes, and the slurry is transferred to the coated substrate with the assistance of a rubberized backing roll located below the screen stencil. The resulting double coat of protective layer and
hot melt adhesive layer virtually completely covers the surface of the substrate, requiring very few coats while being free from backside seizure and having an even
weight distribution. The amount of adhesive required is less and hardly any differences exist, thus reducing costs compared to all
coating methods known hitherto, resulting in additional flexibility and good or even enhanced adhesion.