Multi-layer packaging pad
A packaging system comprising one or more multi-layer packaging pads applied to a pre-wrapped object, such as a metal coil, at high wear locations for increased abrasion resistance. The multi-layer packaging pad includes first and second plies and optionally a slip sheet. The first and second plies are disposed in an overlapping arrangement and have first and second inside slip surfaces, respectively, that face one another. The first and second plies are connected along only a sealed perimeter of the multi-layer packaging pad to provide a slip region between the first and second plies. The first and a second inside slip surfaces are formulated to slide relative to one another such that an unconstrained middle portion of the second ply is moveable relative to the first ply. Associated methods of manufacture and use are also provided.
1 . A multi-layer packaging pad, comprising:
a first ply including an inner pad surface;
a second ply including an outer pad surface;
said first and second plies disposed in an overlapping arrangement with said outer pad surface of said second ply facing out away from said inner pad surface of said first ply, and
said inner pad surface of said first ply including cling properties or an adhesive,
wherein each of said first and second plies is a multi-layer film laminate comprising multiple sheets of reinforced material each containing reinforcing ribs,
wherein said reinforcing ribs in said first ply include a plurality of longitudinal ribs that run in a longitudinal direction of said first ply,
wherein said reinforcing ribs in said second ply include a plurality of cross-direction ribs that have the same construction as said longitudinal ribs in said first ply and that run in a cross-direction that is perpendicular or oblique to said longitudinal direction of said first ply,
wherein said sheets of reinforced material are disposed in an overlapping or partially overlapping arrangement at different angular orientations such that said plurality of longitudinal ribs of said first ply extend in a different directions relative to said cross-direction ribs of said second ply to provide a multi-axial rib overlap across said first and second plies.
2 . The multi-layer packaging pad as set forth in claim 1 , wherein said reinforcing ribs in each of said first and second plies include transverse ribs that are arranged at an oblique angle relative to said longitudinal ribs in said first ply and said cross-direction ribs in said second ply.
3 . The multi-layer packaging pad as set forth in claim 2 , wherein each of said longitudinal ribs comprises a braid of interwoven rib tapes, each of said cross-direction ribs comprises a braid of interwoven rib tapes, and each of said transverse ribs comprise a single rib tape that passes through said braid of interwoven rib tapes at evenly spaced mesh points.
4 . The multi-layer packaging pad as set forth in claim 1 , wherein said reinforcing ribs create a diamond-shaped pattern that extends at least partially across a width of said sheet of reinforced material.
5 . The multi-layer packaging pad as set forth in claim 1 , wherein said sheets of reinforced material are arranged in an overlapping or partially overlapping arrangement such that said multi-layer packaging pad is shaped like an annulus sector or a trapezoid.
6 . The multi-layer packaging pad as set forth in claim 1 , wherein said sheets of reinforced material are arranged in an overlapping or partially overlapping arrangement such that said multi-layer packaging pad is shaped like an annulus.
7 . The multi-layer packaging pad as set forth in claim 1 , further comprising:
a first slip sheet positioned between said first and second plies, wherein said first slip sheet includes at least one slip surface that is formulated to permit sliding between said first slip sheet and at least a middle portion of one of said first and second plies.
8 . The multi-layer packaging pad as set forth in claim 7 , wherein each of said first and second plies comprises an inside film and an outside film and wherein said reinforcing ribs are disposed between said inside and outside films.
9 . The multi-layer packaging pad as set forth in claim 8 , wherein said inside film defines one of said first and second inside slip surfaces opposite an inside film cling surface and wherein said outside film includes an outside film cling surface that is arranged in cling engagement with said inside film cling surface through spaces between said reinforcing ribs.
10 . The multi-layer packaging pad as set forth in claim 9 , wherein said first slip sheet includes a third slip surface that faces said first inside slip surface of said first ply and a fourth slip surface that faces said second inside slip surface of said second ply and wherein said first inside slip surface of said first ply and said third slip surface of said first slip sheet are formulated to slide relative to one another and said second inside slip surface of said second ply and said fourth slip surface of said first slip sheet are formulated to slide relative to one another.
11 . The multi-layer packaging pad as set forth in claim 10 , wherein at portion of said first slip sheet is unconstrained and is moveable relative to said first and second plies to define a slip region between said first and second plies.
12 . The multi-layer packaging pad as set forth in claim 11 , further comprising:
a third ply disposed in an overlapping arrangement with one of said inner pad surface of said first ply and said outer pad surface of said second ply;
said third ply being connected to said first and second plies at said sealed perimeter of said multi-layer packaging pad to provide a second slip region between said third ply and one of said first and second plies; and
a second slip sheet positioned in said second slip region between said third ply and one of said first and second plies, said slip sheet including a fifth slip surface that is formulated to slide relative to one of said first and second plies and a sixth slip surface that is formulated to slide relative to said third ply.
13 . The multi-layer packaging pad as set forth in claim 1 , wherein said inner pad surface of said first ply includes an adhesive free edge.
14 . The multi-layer packaging pad as set forth in claim 13 , wherein said adhesive free edge has a width of at least 0.5 inches.
15 . The multi-layer packaging pad as set forth in claim 13 , wherein there is no adhesive or cling properties on said inner pad surface of said first ply along said adhesive free edge, said adhesive free edge circumscribes an adhesive zone, and said inner pad surface of said first ply includes said cling properties or adhesive in said adhesive zone.