Central handled co-extruded stiff polyethylene bag stack and method of making same

A rectangular plastic bag formed of front and back walls secured to each other around their side and bottom edges to leave an opening between the top edges of the walls, each of the walls having a semi-lunar opening with a rectilinear upper edge of a predetermined extent disposed parallel to and spaced from the top edge of the wall and disposed intermediate of the side edges of the wall, the semi-lunar openings of the bag walls being adapted for hanging the bags on a support member in the form of a horizontal projection having a transverse planar surface of a dimension less than said predetermined extent of the rectilinear edge of the semi-lunar opening, said opening also serving to receive a user's hand for carrying the bag when the bag has been removed from the projection, each of said bag walls being formed of a co-extrusion of HMW HDPE to provide an inner wall of at least 50% of the total wall thickness, and of MLDPE of correspondingly less than 50% to constitute with HMW HDPE 100%, and to provide the outer wall, said outer wall having been treated to 45 dynes of corona treatment;

• thereby, the co-extruded bag's inner wall provides a desired degree of stiffness to the bag as a function of the percentage of HMW HDPE of the total wall thickness to prevent tearing of the bag at the semi-lunar opening when used as a handle for a bag filled with articles, and the outer wall provides a degree of receptivity for printing and adhesiveness, as a function of the percentage of MLDPE of the total wall thickness, and for successive openings for bags carried on the support member for removal upon filling.