Heat cut and Heated cut
Even if hot cut and heated cut sound similar at first, they must be clearly separated from each other. They differ not only in terms of the temperatures they can achieve, but also in their areas of application.
Hot cut
The PQAS H / PQDS H hot cut holder was developed for cutting synthetic fabrics (e.g. typewriter ribbons and textiles).
The hot cut element can be heated up to 750°. Due to this relatively high temperature, the respective cutting material is separated and at the same time the cut edges are welded. Depending on the cutting materials, cutting speeds of up to 70 m/min are possible.
Speed and temperature must be precisely matched to ensure an optimum cutting process and simultaneous welding of the edges.
Heated cut
The field of application of the heated cut is the processing of papers and plastic films coated or impregnated on both sides with adhesive (hot melt adhesive) for label and sticker production.
In the cold-cutting processes used to date (squeeze and shear cutting), the adhesive coating sticks to the knife edges and leads to web breaks and poor cut edges in the short term.
To eliminate or minimize the adhesion of the adhesive to the knife edges, a heatable crush knife holder, the PQAS BH, was developed. With this crush knife holder, the crush knife is heated to approx. 70° C by radiation heat.
