Multilayer stretchy drawstring
AssigneeReynolds Consumer Products, Inc.
InventorsYu Hu, Thomas A. White, David V. Dobreski
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Abstract
The disclosed subject matter relates to a multilayer stretchy drawstring and methods of making the same. The drawstring of the disclosed subject matter is a stretched multilayer coextruded or laminated film that offers good balance between easy stretching at low strain and high strain hardening at high strain. The multilayer film includes a first layer of elastomeric polymer and second and third layers of thermoplastic polymer and is stretched beyond the deformation limit of the thermoplastic polymer and allowed to recover. This novel drawstring can be incorporated into a bag to enable the bag to be securely fitted to the upper portion of a trash container while not interfering with the intrinsic strength and operation of the drawstring.
Claims31
A drawstring bag comprising:
- first and second thermoplastic body panels joined along a pair of opposing sides and a bottom bridging the opposing sides, the joined first and second body panels defining a mouth disposed opposite the bottom;
- a drawstring comprising a first layer of elastomeric polymer, a second layer of thermoplastic polymer, and a third layer of thermoplastic polymer, the thermoplastic polymer of the second layer and of the third layer each having a deformation limit, the second layer and the third layer being disposed on opposite sides of the first layer, wherein the drawstring is stretched beyond the deformation limit of the thermoplastic polymer of the second layer and the third layer respectively and allowed to elastically recover, the drawstring has a tensile strength of at least 22 lbs;
- the drawstring being disposed proximate the mouth of the bag.
A drawstring comprising:
- a first layer of elastomeric polymer, a second layer of thermoplastic polymer, and a third layer of thermoplastic polymer, the thermoplastic polymer of the second layer and of the third layer each having a deformation limit, the second layer and the third layer being disposed on opposite sides of the first layer, wherein the drawstring is stretched beyond the deformation limit of the thermoplastic polymer of the second layer and the third layer respectively and allowed to elastically recover, the drawstring has a tensile strength of at least 22 lbs.
Dependencies are inferred from the claim text.