Thermoplastic films and bags with improved strength properties created by angled ring rolling

A multi-layer thermoplastic bag comprising:

• a first thermoplastic bag formed from a first thermoplastic film, the first thermoplastic bag comprising first and second opposing sidewalls joined together along a first side edge, an opposite second side edge, an open first top edge, and a closed first bottom edge;
• a second thermoplastic bag formed from a second thermoplastic film, the second thermoplastic bag being positioned within the first thermoplastic bag, the second thermoplastic bag comprising third and fourth opposing sidewalls joined together along a third side edge, an opposite fourth side edge, an open second top edge, and a closed second bottom edge;
• a first plurality of alternating thicker and thinner ribs extending continuously across the first thermoplastic bag at a first acute angle relative to a machine direction of the first thermoplastic film;
• and
• a second plurality of alternating thicker and thinner ribs extending continuously across the second thermoplastic bag at a second acute angle relative to a machine direction of the second thermoplastic film, wherein the second acute angle is different from the first acute angle;
• wherein the first plurality of alternating thicker and thinner ribs are configured to redirect propagating tears away from the machine direction of the first thermoplastic film.