Abstract:
Methods for creating multi-layered bags with increased or maintained strength involve forming a ribbed pattern in one or more film layers of a multi-layered bag. The method also includes non-continuously laminating the film layers of the multi- layered bag together. In one or more implementation, a transverse direction ring rolling process forms the ribbed pattern and bonds the film layers together. In one or more additional implementations, the ribbed pattern and lamination are formed separately. Still further implementations include forming network patterns one or more film layers of a multi-layered bag. Multi-layered bags formed in accordance with one or more implementations of the present invention include one or more of increased strength or reduced basis weight.
Abstract:
A 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. The multi¬ layer web material may include a first layer and a second layer adjacent to the first layer. 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.
Abstract:
The bag includes a draw tape that may be used to cinch closed the opening of the bag. The draw tape is multilayer with a polypropylene core and propyleneethylene copolymer or other suitable polymers in the outer layers. In one embodiment, a draw tape bag comprises a first sidewall; a second sidewall, the second sidewall joined to the first sidewall by a closed bottom end, a first edge, and a second edge, thereby defining an open top end; at least one of the sidewalls forming a hem, the hem including one or more draw tape notches; a pliable thermoplastic draw tape housed within the hem and attached to the bag by side seals at the first and second edges of the bag; wherein the draw tape comprises a multilayer structure with a polypropylene core and propylene-ethylene copolymer outer layers.
Abstract:
Polymer films may be discontinuously laminated by processes such as adhesive bonding, ultrasonic bonding, embossing, ring rolling, and strainable network formation. The films may be prestretched under cold process conditions before lamination. The laminates have superior properties such as tear strength. The laminates may be incorporated into bags, such as trash bags.
Abstract:
A plastic bag with flexible sidewalls defining an interior volume for holding contents includes a reinforcing feature to resist puncture and/or rupture of the bag. The reinforcing feature may include reinforcing the portion of the bag proximate the bottom edge with additional or thicker thermoplastic material. In various embodiments, the reinforcing feature may be a strip of plastic material attached along a bottom edge of the bag, either internally or externally, to provide additional material resistant to puncture. In other embodiments, the sheet material used to produce the bag may be made with varying thicknesses. In addition, methods of manufacturing a bag with such reinforcing features in a high speed automated process are disclosed.
Abstract:
A vacuum storage system can have a storage container such as a semi-rigid bowl or a flexible thermoplastic bag and an evacuation device for evacuating the container. To draw air from the storage container, the container can be equipped with a one-way valve element attached to a exterior sidewall of the container. The valve element can interface with a nozzle of the evacuation device. The valve element is adaptable between a normal condition in which the valve element is closed, and an altered position in which the valve element is opened. To alter the valve element, the evacuation device includes a contact feature that can contact and displace the valve element.
Abstract:
The bag for receiving refuse may include a bag body, the bag body including an inside surface, an outside surface, and a rim defining a mouth. The bag may also include a first strip of material disposed on the inside surface of the bag body proximate the rim. The strip may include an inside surface, an outside surface that faces the inside surface of the body, a top edge, and a bottom edge. The bag may also include a front wall, a back wall, and a hem, the hem including a drawstring. The strip may include a printed design. The design could be letters, numbers, pictures, writing, or any other design. When the bag is inserted into a trash receptacle such that the rim of the bag is folded over the rim of the receptacle, the printed design is visible from outside the receptacle.
Abstract:
The bag for receiving refuse may include a bag body, the bag body including an inside surface, an outside surface, and a rim defining a mouth. The bag may also include a first strip of material disposed on the inside surface of the bag body proximate the rim. The strip may include an inside surface, an outside surface that faces the inside surface of the body, a top edge, and a bottom edge. The bag may also include a front wall, a back wall, and a hem, the hem including a drawstring. The strip may include a printed design. The design could be letters, numbers, pictures, writing, or any other design. When the bag is inserted into a trash receptacle such that the rim of the bag is folded over the rim of the receptacle, the printed design is visible from outside the receptacle.
Abstract:
The bag for receiving refuse may include a bag body, the bag body including an inside surface, an outside surface, and a rim defining a mouth. The bag may also include a first strip of material disposed on the inside surface of the bag body proximate the rim. The strip may include an inside surface, an outside surface that faces the inside surface of the body, a top edge, and a bottom edge. The bag may also include a front wall, a back wall, and a hem, the hem including a drawstring. The strip may include a printed design. The design could be letters, numbers, pictures, writing, or any other design. When the bag is inserted into a trash receptacle such that the rim of the bag is folded over the rim of the receptacle, the printed design is visible from outside the receptacle.
Abstract:
A microwavable material having a structure that may be used to enhance the browning and crisping, and thus improve the taste and appearance, of a food item cooked therein. The material may be in the form of a sheet material or formed as a container such as a bag, pouch, or other suitable structure. The material may comprise one or more features that help bring the material into close contact with the food item and help conform the bag around the food item. Furthermore, the material may comprise a structure that avoids substantial contact with liquid released by a food item, may have a venting system suitable for the exiting of moisture, may have a coating, a transparent surface, and when formed as a container, may have a gusseted surface.