I am doing an LCA on wood plastic composite boards. I am using the ELCD database and the ILCD 2011 midpoint+ impact assessment method. Here is my product system:
The material is made of PVC and wood flour, however I am comparing different plastics materials as well. When using PVC as an input in the blender process I get negative results in the resource depletion impact category. This makes no sense to me, as PVC is not environmentally friendly at all.
Does anyone know why I get negative results in this impact category only? If i use PE or PP input I get positive results for this impact category.