A Novel Solventless Approach to Manufacture Pre-pregs and Laminates with Improved Dimensional Consistency

摘要

This study refers to the development of a continuous process for manufacturing pre-pregs and copper-clad laminates for electronic applications, with the aim to overcome four critical technological challenges, the elimination of environmentally detrimental solvents, elimination of voids, elimination of residual stress variability between laminates and improvement in process economics. The process is based on the concept of injection pultrusion or continuous RTM. The heart of the process is the impregnation/B-staging die. Glass fabric and resin are fed into the die where impregnation and B-staging occurs. In the present paper, a potential resin system has been identified and its chemo-rheology studied. We also present a simplified model for the flow in the B-staging die and use it to develop a preliminary process window.