Sheet packaging material for producing sealed packages of pourable food products

A sealed package for a pourable food product, the sealed package comprising:

• a sheet packaging material folded and sealed to form a sealed package, the sheet packaging material comprising:
• a base layer, the base layer configured to impart stiffness to the sheet packaging material;
• a lamination layer covering the base layer;
• a partially laminated opening zone;
• a reclosable opening device comprising:
• a frame fitted about a partially laminated opening zone and comprising a pouring spout;
• a removable threaded cap, the removable threaded cap configured to close the pouring spout by screwing onto the frame;
• and
• a penetrator located within the interior of the pouring spout, the penetrator comprising:
• at least three penetrating members located proximally to the partially laminated opening zone, the at least three penetrating members extending from a central portion and towards the periphery of the partially laminated opening zone to align with a laminated cutting area;
• a cylinder extending distally from the at least three penetrating members around the periphery of the penetrator;
• a shaft extending distally from the at least three penetrating members at the center of the penetrator;
• and
• wherein the penetrator is configured such that when pressure is applied to the shaft, the penetrating members penetrate the laminated cutting area and the cylinder folds the removable portions toward the interior of the sealed package to open the sealed package, the opening configured to readily allow food product flow in the absence of increased product pressure on the sealed package.