Polymeric compositions for medical packaging and devices

A polymeric composition comprising:

• a heat distortion resistant polypropylene;
• a radio frequency susceptible polymer having a dielectric loss greater than 0.05 at 1-60 MHz and ambient temperature to 250.degree. C. the radio frequency polymer being a polyamide;
• a styrenic block copolymer with hydrocarbon soft segments;
• a flexibilizing polymer capable of imparting flexibility to the polymeric composition, wherein the flexibilizing polymer is selected from the group consisting of ultra low density polyethylene, polybutene, and butene ethylene copolymers;
• wherein the flexibilizing polymer and the heat distortion resistant polymer together comprise approximately 55% or more by weight of the polymeric composition;
• and
• the composition having physical properties as follows:
• a<40,000 psi;
• b>=70%;
• c<30%;
• d>1.0;
• e<0.1%;
• f<0.1%;
• g>=0.05
• h<=60%;
• wherein:
• a is the mechanical modulus of the composition measured according to ASTM D-882;
• b is the percent recovery in length of the composition after an initial 20% deformation;
• c is the optical haze of the composition processed into a film 9 mils in thickness measured according to ASTM D-1003;
• d is the loss tangent of the composition at 1 Hz measured at melt processing temperatures;
• e is the elemental halogen content by weight of the composition;
• f is the weight fraction of components capable of leaching from the composition into an aqueous phase;
• g is the dielectric loss between 1 and 60 MHz and over temperatures of 25.degree. to 250.degree. C. of the composition;
• h is the sample creep measured at 121.degree. C. for a 1 inch strip of the composition under 27 psi loading;
• and wherein,
• the composition exhibits no strain whitening after being strained at moderate speeds of about 20 inches (50 cm) per minute to about 100% elongation.