Self-opening polyethylene bag stack and process for producing same

A self-opening bag stack of t-shirt type bags in substantial registration, each of said bags comprising laterally spaced upwardly extending handles, an open mouth portion between said handles and a central support portion extending upwardly from said open mouth portion;

• said self-opening bag stack being adapted to be supported by said handles and said central support portion on a rack system for consecutive dispensing and self opening of adjacent bags in said stack;
• each of the bags in said stack including front and rear polyethylene film walls comprising at least about 50 wt. % high density polyethylene based on polymer weight;
• at least an upper portion of the outer surface of the front and rear walls of each of said bags having been corona treated;
• and
• at least one localized compression area extending transversely through said stack and releasably adhering adjacent outer corona treated surfaces of said bags together and wherein inside wall surfaces of said bags defined by said localized compression area are free of bonding.