Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Reexamination Certificate
1999-09-17
2002-08-06
Chen, Vivian (Department: 1773)
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
C428S036600, C428S480000, C428S481000, C428S534000, C428S535000, C428S537500, C040S768000
Reexamination Certificate
active
06428881
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a matboard and/or backing board and to methods of making and using it. Matboard and/or backing board is used as a barrier for protecting artwork on paper or in acrhival packaging or in picture or artwork framing.
The invention further generally relates to matboard and/or backing board comprised of an outer layer that is a protective layer and a vapor barrier; e.g., preferably PET, PBT, co-PET, co-PBT or mixtures thereof; and methods for making and using the same.
The invention also relates in a first advantageous embodiment to a matboard comprising: a first layer of mat paper (of any various color), advantageously buffered to the basic side of neutral pH, e.g., greater than pH 7, such as pH of greater than 7.0 to about 9.0 or about 7.5 to about 8.0; a second layer of adhesive, advantageously buffered to the basic side of neutral pH, e.g., greater than pH 7, such as pH of greater than 7.0 to about 9.0 or about 7.5 to about 8.0, for instance a layer of polyvinyl acetate advantageously buffered to the basic side of neutral pH, e.g., greater than pH 7, such as pH of greater than 7.0 to about 9.0 or about 7.5 to about 8.0; a third layer of board core, e.g., chipboard core or solid white core or cotton fiber board, advantageously alum and/or lignin free, preferably alum and lignin free, and also advantageously alkaline, such as pH of greater than 7.0 , e.g., pH of about 7.1 to about 10.0 such as a pH of about 7.2 to about 9.5; a fourth layer of adhesive, advantageously buffered to the basic side of neutral pH, e.g., greater than pH 7, such as pH of greater than 7.0 to about 9.0 or about 7.5 to about 8.0, for instance a layer of polyvinyl acetate advantageously buffered to the basic side of neutral pH, e.g., greater than pH 7, such as pH of greater than 7.0 to about 9.0 or about 7.5 to about 8.0; and a fifth layer, which is an outer layer, of a vapor barrier and protective material, such as PET, PBT, co-PET, co-PBT and mixtures thereof. Advantageously, the first, second, third, fourth and fifth layers are in direct contact (first to second, second to first and third, third to second and fourth, fourth to third and fifth and fifth to fourth).
The invention also relates in a second advantageous embodiment to a backing board comprising: a first layer, which is an outer layer, of a vapor barrier and protective material, such as PET, PBT, co-PET, co-PBT and mixtures thereof; a second layer of adhesive, advantageously buffered to the basic side of neutral pH, e.g., greater than pH 7, such as pH of greater than 7.0 to about 9.0 or about 7.5 to about 8.0, for instance a layer of polyvinyl acetate advantageously buffered to the basic side of neutral pH, e.g., greater than pH 7, such as pH of greater than 7.0 to about 9.0 or about 7.5 to about 8.0; a third layer of board core, e.g., chipboard core or solid white core or cotton fiber board, advantageously alum and/or lignin free, preferably alum and lignin free, and also advantageously alkaline, such as pH of greater than 7.0, e.g., pH of about 7.1 to about 10.0 such as a pH of about 7.2 to about 9.5; a fourth layer of adhesive, advantageously buffered to the basic side of neutral pH, e.g., greater than pH 7, such as pH of greater than 7.0 to about 9.0 or about 7.5 to about 8.0, for instance a layer of polyvinyl acetate advantageously buffered to the basic side of neutral pH, e.g., greater than pH 7, such as pH of greater than 7.0 to about 9.0 or about 7.5 to about 8.0; and a fifth layer, which is an outer layer, of a vapor barrier and protective material, such as PET, PBT, co-PET, co-PBT and mixtures thereof. Advantageously, the first, second, third, fourth and fifth layers are in direct contact (first to second, second to first and third, third to second and fourth, fourth to third and fifth and fifth to fourth).
The inventive matboard and/or backing board can be any suitable size or shape, e.g., round, square, rectangle, etc. The sizes and shapes for an inventive matboard and/or backing board can be matched to artwork or archival document and the like for which it is to be used as backing. The protective and vapor barrier layer (e.g., PET, PBT, co-PET, co-PBT and mixtures thereof) is advantageously non-reactive, and acid free, and more advantageously neutral, non-reactive and a protective barrier against the migration of trace amounts of acid, moisture and other contaminants that might potentially damage artwork, archival documents and the like.
More generally, the protective and vapor barrier layer is advantageously a thermoplastic such as a polyethylene terephthalate (polyester; or PET), or a polybutylene terephthalate (PBT), or a copolymer of polyethylene terephthalate (polyester; or PET), or copolymer of polybutylene terephthalate (PBT), or a polypropylene, or a polyethylene such as a polyethylene from a single site catalyst system, or a metal foil. In preferred embodiments, this layer is from PET, PBT, cope, coPBT or mixtures thereof, most preferably, PET; and, this layer can be metallized, e.g., in gold, silver or another color.
The first, third and fifth layers of the aforementioned first and second advantageous embodiments are joined in any desired manner, preferably via lamination with the second and fourth adhesive layers (e.g., polyvinyl acetate or “PVA” layers) as described above together. Thus, in a further embodiment, the invention relates to a matboard or a backing board comprising the first, third and fifth layers of the aforementioned first and second advantageous embodiments.
The invention therefore contemplates a method of manufacture comprising laminating the first, third and fifth layers via the second and fourth adhesive layers.
And, the invention contemplates methods of using the matboard and/or backing board, e.g., providing a matboard and/or backing board of the invention and placing artwork or an archival document or picture upon it, and optionally framing the artwork, document or picture in a frame (with or without glass or plastic over the artwork, document or picture) with the artwork, document or picture against the matboard and/or backing board.
Other aspects of the invention are described herein or are obvious from this text. In this text, “comprising” is used in the sense attributed to it in U.S. Patent Law; e.g., it can mean “including”. Various documents are cited in this text (“herein cited documents”). Herein cited documents and documents cited or referenced in herein cited documents, are hereby incorporated herein by reference.
BACKGROUND OF THE INVENTION
A standard matboard can be composed of mat facing paper buffered to the basic side of neutral pH, a PVA layer buffered to a pH of 7.5-8.0, regular unbleached pulp core (acid free by not totally lignin free), another PVA layer, and a backing of alkaline book paper (acid free, but porous and not a barrier to the passage of contaminants).
White core matboard can be composed of mat facing paper buffered to the basic side of neutral pH, a PVA layer buffered to a pH of 7.5-8.0, a solid white core (alum and lignin free and alikaline with a pH of 7.2 to 9.5), another PVA layer, and a backing of alkaline book paper (acid free, but porous and not a barrier to the passage of contaminants).
Museum board can be composed of one to several layers of 100% cotton fiber board laminated with all natural starch adhesive, acid free and buffered with 3% calcium carbonate to a Ph of 8.5 to 9.5 and alum free and alkaline with no lignin. This board can be porous and not a barrier to the passage of contaminants.
Reference is also made to Williams et al., U.S. Pat. No. 3,898,356, and Hollinger, Jr., U.S. Pat. Nos. 4,489,120, 5,525,296, 5,633,054, 5,693,384, 5,714,120, and 5,922,280. These documents fail to teach or suggest a matboard and/or backing board as herein described.
Thus, it is a problem in the art that matboards and backing boards can be porous; fail to include an outer layer of a protective and vapor barrier film such as PET, PBT, co-PET, co-PBT and mixtures thereof, or as described herein. For better preservatio
Chen Vivian
Frommer & Lawrence & Haug LLP
Rupaco Paper Corporation
LandOfFree
Matboard/backing board and methods of manufacture and use does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Matboard/backing board and methods of manufacture and use, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Matboard/backing board and methods of manufacture and use will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2973352