Method for separate closure extrusion

A method of manufacturing a resealable closure mechanism for later attachment to a first package film and to a second package film, the resealable closure mechanism and first and second package films providing a polymeric package, comprising:

• extruding a female interlocking closure member from a first resin through a first die plate by a first extruder;
• extruding a male interlocking closure member from a second resin through a second die plate by a second extruder;
• cooling the female and male interlocking closure members;
• extruding a first base strip from a third resin through a third die plate by a third extruder;
• extruding a second base strip from a fourth resin through a fourth die plate by a fourth extruder;
• bonding the first base strip to the cooled female interlocking closure member;
• bonding the second base strip to the cooled male in interlocking closure member;
• and
• interlocking the female and male interlocking closure members, the resealable closure mechanism thus formed being for later attachment to a first package film and a second package film.