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2603results about "Binding material application" patented technology

Stretch wrap films

InactiveUS6093480AImprove clingImproved maximum stretchWrappers shrinkageSynthetic resin layered productsStretch wrapGram
A multilayer, thermoplastic stretch wrap film containing at least three polymeric film layers and comprised of a first layer and a second layer. The first and second layers may comprise a polymer of two or more monomers, wherein a first monomer is ethylene, in a major amount by weight, and a second monomer is an alpha olefin of from about 3 to about 12 carbon atoms, in a minor amount by weight. If the first and second layers are outer layers, they have a cling force to each other of at least about 140 grams/inch. The stretch wrap film also has at least one inner polymeric layer, located between the first and second layers. The inner polymeric layer comprises a low polydispersity polymer having a polydispersity of from about 1 to about 4, a melt index (I.sub.2) of from about 0.5 to about 10 g/10 min., and a melt flow ratio (I.sub.20 /I.sub.2) of from about 12 to about 22. The inner layer(s) comprise(s) from about 5 wt. % to about 40 wt. % of the stretch wrap film so as to produce a film having a maximum stretch of at least 340%, a F-50 dart drop value of at least about 130 g/mil, a machine directional tear resistance of at least about 125 g/mil and a transverse directional tear resistance of at least about 500 g/mil. It is contemplated that additional outer layers may be added such an outer high cling layer or an outer slip layer, as well as additional inner layers.
Owner:BERRY PLASTICS CORP

Method and apparatus for wrapping a load

Apparatus (2) for wrapping a load (18) placed on a turntable (4) having a mast assembly (8), a carriage assembly (12) adapted for vertical slideable movement along said mast assembly (8) and dispensing means (13) for dispensing tape material (80). The tape material (80) is transferred from the dispensing means (13) in response to rotation of the turntable (4) such that the tape material (80) wraps around the load (18) in a predefined pattern. The carriage assembly (12) and turntable (4) are configured for automated movement in response to a computer program stored in memory means (306) to enable wrapping of the load (18) with the tape material (80) in the predefined pattern. The carriage assembly (12) is positioned along the mast assembly (8) under control of the computer program in accordance with a rotational position of the load (18) to locate the tape material (80) at locations on the load (18). A pretensioning apparatus is also disclosed for pretensioning the tape material (80). Also disclosed is apparatus including adjusting the rate at which tape material (80) is payed out depending on a portion of the load (18) to be wrapped by the tape material (80). Also disclosed is tension adjustment apparatus (100) for varying the tension applied to the tape material (80).
Owner:SAFETECH PTY LTD
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