Process for forming a multilayer, coinjected article

A process for coinjection-molding a 5-layer article comprising:

• coinjection-molding at a selected coinjecting temperature (i) two outer polymer resin layers comprising at least one outer polymer resin each having a viscosity and an elasticity at the selected coinjecting temperature, and (ii) two intermediate polymer resin layers disposed between a core layer and the two outer layers, the two intermediate polymer resin layers comprising at least one intermediate polymer resin each having a viscosity and an elasticity at the selected coinjecting temperature, and (iii) a core layer comprising a core polymer resin having a viscosity at the selected coinjecting temperature, wherein at each polymer resin interface the ratio of the outermost polymer resin viscosity to the next innermost polymer resin viscosity is less than or equal to about 1 and the elasticity ratio for each interface is approximately the reciprocal of the viscosity ratio at that same interface.