| 摘要 |
The invention comprises an extrusion head for coating or adhesive application. The head is particularly well adapted for application of high viscosity hot melt adhesives in the manufacture of corrugated board. It comprises the combination of a body having a slit or series of orifices with a thin, flexible downstream spreader element. The spreader element contacts the coating receiving surface at a low acute angle to level the coating material but does not serve as a doctor to control coating thickness. When used as the adhesive applicator at the single facer of a container board corrugating machine, excellent pin adhesion values were obtained at adhesive usages as low as 6 g/m2.
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