USING RHEOLOGICAL DATA IN THE DEVELOPMENT OF COEXTRUSION PROCESSES

摘要

The development of successful coextrusion systems demands careful control and matching of the constituent polymers, ideally at an early stage of the development process. Poor matching may result in a complete lack of adhesion between the different layers and/or unacceptable surface quality, caused in part by instabilities at the interface. Pilot and full-scale trials are potentially a costly part of the development cycle and there is a place for less expensive tools that yield relevant information. Here we look at one such approach - a coextrusion die designed specifically for use with Rosand capillary rheometers, which can be applied to small-scale coextrusion experimentation.