| 摘要 |
The disclosure relates to a flexible thermoplastic bag suitable for use as a liner for a garbage canister or trash receptacle may be made from a multi-layered thermoplastic web material, wherein the thermoplastic bag comprises: a first sidewall of pliable thermoplastic material; a second sidewall of pliable thermoplastic material joined to the first sidewall along a first side edge, a second side edge and a closed, folded bottom edge, the first and second sidewalls un-joined along their respective top edges to provide an opening for accessing the interior volume; the first sidewall and second sidewall forming a hem, the hem having a hem seal and a draw tape within the hem; wherein the thermoplastic material of the first sidewall consists essentially of a thermoplastic, multi-layer laminate film comprising: a first layer of thermoplastic material; and an adjacent second layer of thermoplastic material, wherein the first and second layers are co-extruded and the first and second layers of the multi-layer laminate film are adapted to delaminate from each other upon the application of a force typical of normal use conditions of the bag due to a co-extrusion bond between the first and second layers at least partially breaking; and wherein the first layer and second layers are of different materials and are selected from the group of materials consisting of high density polyethylene, low density polyethylene, medium density polyethylene, linear low density polyethylene, very low density polyethylene, polypropylene, ethylene vinyl acetate, nylon, polyester, ethylene vinyl alcohol. Under typical conditions, the layers may tend to block or adhere together to remain in their adjacent position. However, the layers may delaminate and separate from each other when sufficient forces are applied. Delamination of the layers allows the layers to move with respect to each other when the force is applied. The delaminating of the layers absorbs energy which may increase tear and puncture resistance. |
