Patent ID: 6590034
Filing Date: 2003-07-08
Classification: B32B,C08L,C09K,Y10T

Abstract:
A peelable seal, comprising:a mixture of two immiscible polymers; a first polymer forming a continuous phase, the first polymer having a shear viscosity &eegr;1 at a temperature of about 230Â° C. and a shear rate of about 100 radian/second; and a second polymer being dispersed in the continuous phase, the second polymer having a shear viscosity &eegr;2 at a temperature of about 230Â° C. and a shear rate of about 100 radian/second, wherein the two polymers define a shear viscosity differential: &Dgr;=|(&eegr;1âˆ’&eegr;2)/&eegr;1|, and the shear viscosity differential &Dgr; is less than about 100%.