Reducing Adhesion

Reducing Adhesion

Polyvinylbutyral has a very high adhesion in screen printing. Can it be reduced?

The question refers to the adhesion of screen printing colours on a base of polyvinylbutyral and how it can be avoided. Several possibilities are open:
  • Use of a high-melting type of polyvinylbutyral (e.g. BL 16 from Wacker).
  • Use of an additive for improving the surface. There are a great many of these, for example, from Georg M. Langer, D-2863, Ritterhude (including a PTFE base), as well as from Servo, Holland, and from several other countries as well.
  • Polyvinylbutyral has the excellent property of being able to combine with many other binding agents. Evidence of this is given in the Wacker literature. Their address is D-8000 Munich.
Ketone resins are also among those products belonging to the combination binding agents. Good compatibility with epoxy resins, particularly the liquid types is also noticeab|e.Combination with a phenoxy resin, particularly with Riitapox 0717 (Riitgers) or PKHC (Union Carbide) is also a favourable point. These are some of the many possibilities with which the above problem can be solved.

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