Hard-Soft Composites Made of LSR and Polycarbonates Activated with UV Light

Abstract

Multi-component injection moulding of liquid silicone rubbers (LSRs) in combination with thermoplastics is becoming increasingly important in plastics processing. This is also increasing the need to combine previously incompatible materials economically. This article shows how materials available on the market can be quickly combined in an injection-moulding process using a relatively simple pretreatment method – UV irradiation. In addition, this article discusses how long the activity of the pretreatment method persists and what effect this has on the adhesive bond. Finally, it is shown how partial adhesion of LSR to polycarbonates can be achieved.

MC-Injection Molding with Liquid Silicone Rubber (LSR) and Acrylonitrile Butadiene Styrene (ABS) for Medical Technology

“…The adhesion between thermoplastics and LSR is a decisive feature for the quality of the subsequent product, which, in addition to the injection molding process, depends above all on the material pairing, surface activation, and subsequent conditioning of the overall component [5,6]. Surface activation in the medical environment can be achieved using shortwave ultraviolet (UVC), plasma, or pyrosil treatment.…”