Лако-красочные материалы — производство

Two types of tapes are discussed: carrierless adhesive foils (also called transfer adhesives) used, for example, in mounting or laminating processes, and tapes consisting of an adhe­sive on a carrier tape, used for contact and distance films in foil keypads, covering tapes in galvanizing and solder processes (Fig. 8), and as component supply in insertion installa­tions (Fig. 9). The tape properties required depend, of course, on the type of application. Therefore, the following properties are important for component supply tapes [12]:

1. Constant width of tapes to avoid malfunctions of the handler

2. Sufficient adherence of the components on the tape

3. Stability of the adhesive against aging

4. Possible tape lengths up to 5000 m on a spool for effective production

5. Well-defined strength-elongation behavior

It must be noted that the adhesion properties and aging behavior of the supply tapes are determined by the corresponding properties of the adhesives used, whereas the mechanical strength depends primarily on the carrier tape.