Patent application number | Description | Published |
20100012764 | Apparatus and Method for Winding Film Onto a Film Roll - An issue with conventional stretch films is that the edges of the film can be easily damaged, which may result in tearing or failure of the film during use. Folding the film edges may reduce such damage but yields uneven rolls of film that are difficult to unwind. The present disclosure describes in-process devices, systems, and methods for oscillating the film to prevent stacking of the folded edges as the film is wound onto a film roll. The present disclosure also describes in-process devices, systems, and methods for entrapping air between the layers of film as they are wound onto a film roll. As a result, the film is less susceptible to damage and easier to use. | 01-21-2010 |
20100015393 | Apparatus and Method for Folding Film Edges - Pre-stretched films may be used to increase the rate at which loads can be wrapped and to minimize the exertion required when using traditional handheld film. However, the edges of pre-stretched films are easily damaged, which may result in tearing or failure of the film during use. The present disclosure describes devices, systems, and methods for folding the edges of the film, resulting in a film that is less susceptible to damage and easier to use. | 01-21-2010 |
20100015422 | Oriented Film Produced In-Process for Use in the Stretch Film Market - Pre-stretched films may be used to increase the rate at which loads can be wrapped and to minimize the exertion required when using conventional stretch films. However, pre-stretched films must generally be stretched in a separate step and stored for several days in order for cling to fully develop. The present disclosure describes compositions, devices, systems, and methods for producing film that eliminate the stretching and storage steps. In particular, the present disclosure relates to the use of selected resins and an angled die to increase the level of orientation in the film as it is formed, thus eliminating the need to stretch the film in a separate step. The present disclosure also relates to the use of a cling agent which eliminates the storage time traditionally required to develop the film's cling properties. | 01-21-2010 |
20110151216 | Cast Power Stretch Films With Improved Load Containment Force - The present disclosure generally relates to compositions and methods for incorporating higher density metallocene linear low density polyethylene (m-LLDPE) into cast power stretch films. When compared to conventional machine films on a gauge-by-gauge basis, films containing the properly selected m-LLDPE may offer increased load containment force, reduced application force, and comparable elongation and puncture resistance properties. | 06-23-2011 |
20110151217 | Oriented Film Produced In-Process for Use in the Power Stretch Film Market - The present disclosure describes compositions, devices, systems, and methods for producing films which simplify the application process by eliminating the need to stretch film before it is wrapped around a load. Such films also provide enhanced load containment and increased resistance to punctures and breaks. In particular, the present disclosure relates to the use of selected resins and an angled die to increase the level of orientation in the film as it is formed. | 06-23-2011 |
20130059715 | Apparatus and Method for Folding Film Edges - Pre-stretched films may be used to increase the rate at which loads can be wrapped and to minimize the exertion required when using traditional handheld film. However, the edges of pre-stretched films are easily damaged, which may result in tearing or failure of the film during use. The present disclosure describes devices, systems, and methods for folding the edges of the film, resulting in a film that is less susceptible to damage and easier to use. | 03-07-2013 |
20130079210 | Apparatus and Method for Folding Film Edges - Pre-stretched films may be used to increase the rate at which loads can be wrapped and to minimize the exertion required when using traditional handheld film. However, the edges of pre-stretched films are easily damaged, which may result in tearing or failure of the film during use. The present disclosure describes devices, systems, and methods for folding the edges of the film, resulting in a film that is less susceptible to damage and easier to use. | 03-28-2013 |
20130161860 | Oriented Film Produced In-Process For Use in the Stretch Film Market - Pre-stretched films may be used to increase the rate at which loads can be wrapped and to minimize the exertion required when using conventional stretch films. However, pre-stretched films must generally be stretched in a separate step and stored for several days in order for cling to fully develop. The present disclosure describes compositions, devices, systems, and methods for producing film that eliminate the stretching and storage steps. In particular, the present disclosure relates to the use of selected resins and an angled die to increase the level of orientation in the film as it is formed, thus eliminating the need to stretch the film in a separate step. The present disclosure also relates to the use of a cling agent which eliminates the storage time traditionally required to develop the film's cling properties. | 06-27-2013 |
20130244854 | Apparatus and Method for Folding Film Edges - Pre-stretched films may be used to increase the rate at which loads can be wrapped and to minimize the exertion required when using traditional handheld film. However, the edges of pre-stretched films are easily damaged, which may result in tearing or failure of the film during use. The present disclosure describes devices, systems, and methods for folding the edges of the film, resulting in a film that is less susceptible to damage and easier to use. | 09-19-2013 |
20140021644 | Dies and Methods for Improving Physical Properties of Stretch Film - Dies and methods of extruding stretch film are provided, wherein the die includes at least an upper die lip and a lower die lip; the upper and lower die lips at least partially define a die gap; and at least one of the die lips includes a channel. Another die disclosed includes at least a die gap; and at least one jet for directing a stream of air onto the polymer as it is extruded through the die gap. Stretch films and methods for extruding stretch films are provided, wherein selected areas of the polymer extruded through the die have a gauge that exceeds the film's base gauge. The film includes at least a layer of film having a base gauge and a plurality of strength bands running longitudinally along a length of the film; and have a gauge that is greater than the base gauge. | 01-23-2014 |
20140057088 | Oriented Film Produced In-Process for Use in the Power Stretch Film Market - The present disclosure describes compositions, devices, systems, and methods for producing films which simplify the application process by eliminating the need to stretch film before it is wrapped around a load. Such films also provide enhanced load containment and increased resistance to punctures and breaks. In particular, the present disclosure relates to the use of selected resins and an angled die to increase the level of orientation in the film as it is formed. | 02-27-2014 |
20140144589 | Apparatus, Methods, and Compositions for Producing Oriented Stretch Film In-Process - Apparatus and methods for producing folded edges in a film in-process, and compositions of such film are provided. A method of folding edges includes: separating a first idler roll and a second idler roll by a first distance; positioning a plurality of folding guides between the first idler roll and the second idler roll; separating adjacent sections of film having a majority layer comprising a Ziegler Natta catalyzed linear low density polyethylene copolymer resin having molecules that inherently lack long chain branching, wherein a majority of said molecules are oriented in a substantially longitudinal direction due to an induced strain, and inducing two folds with each folding guide, thereby causing an edge of each section of film to turn under 180° and cling to a bottom surface of the section of film; and moving the adjacent sections of film from the folding guides to the second idler roll. | 05-29-2014 |
20140327175 | Stretch Film Using a Multi-Manifold Die - A die for forming a stretch film includes at least: a primary passage for receiving a primary stream, the primary passage having a length extending from a die inlet opening to a die outlet opening; and a flow assembly for supplying a secondary stream to the primary passage at a secondary passage opening. A method for forming a stretch film includes: introducing a primary stream to a primary passage of a die at a die inlet opening, the primary passage having a length extending from the die inlet opening to a die outlet opening; supplying a secondary stream to the primary passage at a secondary passage opening; combining the primary stream and the secondary stream to create a combined stream; passing the combined stream through said die outlet opening; and passing the combined stream from the die outlet opening to a casting unit, thereby forming a film web. | 11-06-2014 |
20140329068 | Stretch Films Containing Random Copolymer Polypropylene Resins in Adjacent Layers of a Nanolayer Structure - A method of producing a stretch film includes at least: extruding a first random copolymer polypropylene (RCPP) resin from a first extruder at a first temperature to at least one primary channel inside of a feedblock; extruding a second RCPP resin from a second extruder at a second temperature to at least one secondary channel, wherein said second temperature is greater than said first temperature; combining the first RCPP resin and the second RCPP resin to create a layered stream using a combining adapter disposed in communication with the feedblock; passing said layered stream from the combining adapter to a die; and passing the layered stream through said die to a casting unit. A multi-layered stretch film includes at least one nanolayer section, the nanolayer section comprising alternating substantially adjacent layers of a first random copolymer polypropylene (RCPP) resin and a second RCPP resin. | 11-06-2014 |
20140329655 | Methods and Apparatus for Producing Stretch Films with Improved Protection From Tear Propagation - A method of folding an interior section of film in-process includes at least the following steps: separating an idler roll and a rolling assembly; positioning an interior web folding assembly between the idler roll and the rolling assembly; passing a film web from the idler roll to the interior web folding assembly; initiating at least one interior fold in the film web using the interior web folding assembly; passing the film web from the interior web folding assembly to the rolling assembly; and passing the film web beyond the rolling assembly, compressing the film web, and completing the at least one interior fold. An apparatus for folding an interior section of film includes at least: an idler roll separated from a rolling assembly; and an interior web folding assembly positioned between the idler roll and the rolling assembly. | 11-06-2014 |