Thin film biaxial tensile tester

description

The principle of biaxial stretching of thin films is to heat and melt high polymer resins through an extruder to extrude thick sheets, which are then heated at the glass transition temperature. Within the appropriate temperature range below the melting point, the high elastic state of the polymer is stretched by a longitudinal and transverse stretching machine under external force, resulting in the molecular chains of the polymer being oriented and arranged in an orderly manner in a direction parallel to the plane of the film; And heat setting is carried out in a stretched state to fix the oriented macromolecular structure. Finally, ideal plastic films can be produced by cooling and subsequent processing