Solid State Extrusion and Die Drawing

Control of the mechanical and thermal properties of semicrystalline polymers via a new processing route of the equal channel multiple angular extrusion

“…The lowest values are achieved for route D+C (Table ), when fibril position is parallel or normal to the extrudate axis. We should note that traditional schemes of die extrusion form clear‐cut uniaxial oriented structure . As a result, anisotropy of strength properties grows as the accumulated strain increases.…”

“…Oriented structure formed in polymers allows significant enhancement of their elasticity and strength characteristics. Traditional methods of solid‐phase deformation are widely used here: rolling, drawing, ram and hydrostatic extrusion . However, the treatment is accompanied by undesirable size change of the original billet and appearing anisotropy of the properties.…”

Plastic deformation and damage of polyoxymethylene in the large strain range at elevated temperatures

“…Substantial improvement in properties as a result of molecular orientation has initiated the development of several thermoforming processes to orient semi-crystalline polymers [1]. These processes include die-drawing [2e5], hydrostatic extrusion [2,6,7], rolling [8,9], roll-drawing [10], constrained rolling [11,12], etc.…”

Reinforcing effect caused by equal channel multiple angular extrusion of polymers manufactured by the FDM process: Experimental investigation and mathematical modeling

“…[1][2][3][4][5][6] There are two main techniques for improving polymer properties: orientation and reinforcement. The basic methods of production of self-reinforced polymeric materials are cold drawing, 8 rolling, 9,10 solid-state hydrostatic or ram extrusion, 11 solution spinning, 12 and melt transformation extrusion or coextrusion. These are results of different characteristics of every component: high strength of the molecular interactions between the filler material and the surrounding polymer matrix, high aspect ratio of the filler, etc.…”

“…Being also referred to as self-reinforcement, 7 orientation is another technique of production of materials with superior properties by modification of the polymers' chain structure in the course of processing. The basic methods of production of self-reinforced polymeric materials are cold drawing, 8 rolling, 9,10 solid-state hydrostatic or ram extrusion, 11 solution spinning, 12 and melt transformation extrusion or coextrusion. 13 These methods are quite different; however, the fundamentals are the same.…”