NON-CONTINUOUSLY LAMINATED MULTI-LAYERED BAGS

摘要

Multi-layer bags may be formed to include first and second sidewalls joined along a first side edge, an opposite second side edge, and a closed bottom edge. The first and second layers may be non-continuously laminated together to include bonded regions in which the layers are bonded and unbonded regions in which the layers are not bonded. Such a bag may be described as a “bag-in-a-bag” type configuration in which the inner bag is non-continuously bonded to the outer bag. The inventors have surprisingly found that such configurations of non-continuous bonding provides increased and unexpected strength properties to the multi-layer films and bags.

主权项

1. A method for forming a thermoplastic bag with a bag-in-bag configuration, the method comprising:
providing first and second thermoplastic films; non-continuously laminating a first thermoplastic film to a second thermoplastic film by a process selected from the group consisting of adhesive bonding, ultrasonic bonding, embossing, ring rolling, SELFing, and combinations thereof; and joining at least two edges of the first thermoplastic film and the second thermoplastic film together to form a bag configuration.