Cross directional zoned bicomponent film laminates

摘要

Abstract An edge laminated film is provided. The film comprising: a first polymer shaped in a planar form that is continuously extended by a second polymer laminated along an edge of the first polymer as defined by a thickness of the planar form. The first polymer has a viscosity versus temperature curve, as measured at shear rates of 500 1/s, 1000 1/s or 1500 1/s, at least 10 percent different in viscosity than the second polymer at every common temperature throughout a melt temperature range of each as calculated relative to the higher viscosity value of each of the polymers. The viscosity is determined by a capillary rheometer equipped with a 1 mm die utilizing a 10:1 length to diameter ratio and a 600 entrance angle. The melt temperature range for a respective one of the polymers is defined as a temperature at a softening peak of a differential scanning calorimetry (DSC) curve to a maximum of 250C less than a degradation peak of the DSC curve, as determined by the DSC curve obtained for a 5.5 mg sample of the respective one of the polymers heated at 20*C/minute.