System and method for manufacturing an improved film for medical supply packaging

A film comprising:

• a heat seal layer comprising approximately 30% medium density polyethylene between 0.926-0.940 g/cm3 and approximately 70% high density polyethylene greater than 0.950 g/cm3;
• a heat resistant layer comprising approximately 70% high density polyethylene and approximately 30% linear low density polyethylene of approximately 0.920 g/cm3;
• a barrier layer between the heat seal layer and the heat resistant layer comprising a blend of 20% linear low density polyethylene and 80% of a second polymer having a relatively high density of at least 0.966 g/cc, wherein the heat seal layer, the barrier layer and heat resistant layer are coextruded at a thickness approximately 3.5 mils at a ratio of approximately 20-60-20 respectively, and have a calculated moisture vapor transmission rate of approximately 0.059 g/100 in2/24 hours/atm;
• a substrate with a thickness of approximately 0.48 mils adhered to the heat resistant layer with an adhesive approximately 0.01 mils thick to make a final film, wherein the substrate is polyethylene terephthalate, and wherein the final film has a thickness of approximately 4.1 mils;
• and
• wherein the final film has a thermal process window that is greater than-ten degrees Celsius 46 41.