Constructing Toxic Potential Indicator (TPI) for mixture material

When the designer applies TPI methodology into mixture material to estimate the environmental impact, the designer will often face an obstacle that the unit of mixtures' MAK is ppm, and the molecular weight of mixtures can't be obtained. Therefore, the designer can't transform the unit of mixtures' MAK from ppm into mg/m3. This study proposes three feasible methods to evaluate the TPI value of mixture products. After comparing the advantages and defects of these three feasible methods, this study proposes a best method to construct the TPI value of mixture material. Constructing the products' TPI with mixtures not only can evaluate the environmental impact, but also can help the designer developing sustainable products.

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