Improving product performance by implementing short glass fibers in injection molding is a common practice. Although this increases strength and stiffness of the material, the fibers are often sub optimal oriented. For optimal product performance, glass fibers should be oriented in the loading direction and should be as long as possible. Adding UD-glass fiber tapes or stacks of UD tapes to strategic positions in the product, will further increase the material and product performance. Subsequently, this allows for a thorough geometry and material use optimization. An important factor to access the full potential of the UD tape is optimizing the interphase strength between tape and product. Interphase strength is predominantly related to healing via interdiffusion of the material. To test the influence of process settings on this healing, a DoE was performed to test the influence of mould temperature, melt temperature, UD tape temperature and packing pressure on the final peal strength between the UD tape and the product. By performing process simulations, the local interphase temperature was linked to the DoE parameters. The temperature evolution as a function of time is used to determine the healing capabilities between both materials. Using the intersection between G’ and G” results obtained via a frequency sweep of material via DMA and Plate-plate rheometer, the temperature dependent reptation time and was determined. The final peel strength of the samples was related to expected healing and occurring interphase temperature. As expected, healing shows a better relation to interphase strength if compared with only interphase temperature.