Abstract: Micro-scale effect and wall slipping mechanism of polymer in microchannels were studied and analyzed using on Polyflow software. The effect of viscosity and wall slipping on polymer flow in microchannels was analyzed based on different boundary conditions. The effect of length of compressive section on deformation of the products was studied. It showed that with wall slipping, the resistances at flow of polymer melt decreased, velocity distribution became more uniform, and the deformation of the products reduced.

Key words: micro-scale effect, wall slipping, extrusion, deformation