I have read about using taffeta some time ago on another forum.Finally wrote: The material is called Right Sheen or Right Sheen Polyester Tafetta.
Someone was having problems using taffeta for peelply. While the material foundation is the same, it appears that some taffeta is manufactured with a filler or buffer (not sure of the exact terminology, but something to make the material feel stiffer than the fibres alone) that contains silicone. After a while, they had a huge patch of delamination where the taffeta peelply was used.
Given the potential problem that could occur, you would have to be careful about the supplier to ensure that it really is suitable.