This paper reports on molecular design of HMPSA. The maximum attractive force between twosets of molecules (adhesion strength ) is derived from the Lennard - Jones Potential function.Using unified theory and the viscoelastic data the resin concentration and the Tg of the tackifyingresin, which are necessary to produce a good HMPSA with these triblock coPO1poers, can be calculatFrom esperimental results, it is indicated successfully.