No grade of plastic is required to make Jet Fuel A or B, it's the hydro-carbons found in all plastics that make the fuel, no hydro-carbons, no jet fuel, period. Throw in a batch made with HDPE one day and the next day throw in a mixed load of LDPE and PP and the fuel that both make will be indistinguishable from each other, it will be diesel #2 and naphtha/gasoline.