Patent Application
20080236077
This invention relates to a non-deformable but shapeable, lightweight, wall paneling material that is easily subdivided into uniform sections or pieces and has superior strength with insulating and sound proofing properties.
Current wall paneling material with a high strength to weight ratio are heavy or can not be curved readily into a desired shape. Most of this sandwiches a foam material between two metal sheets. Because of the metal sheets, these panels are not only heavy but the finishing cover layers are also not easily applied on their outer surfaces. A lightweight paneling material of a high strength to weight ratio is disclosed in U.S. Pat. No. 4,351,870 issued to Edgar English, Jr., hereinafter English. English achieves this property by sandwiching a strength increasing stiffening material between at least two layers of lightweight bulk producing layers such as foamed plastic or foam rubber material. While it achieves a high strength to weight ratio, the panel material is not shapeable. Further, to be able to divide the panel into equivalent or uniform sections or parts, one needs to do the cut at the middle of the crisscross or square design of the stiffening material (stiffening sheet 82) to have pieces of equivalent weight to volume ratio. Equivalent weight to volume ratio is achieved when the amount of stiffening material and bulk producing layers are approximately the same with each piece of equivalent volume or area. Having equivalent weight to volume ratio on the pieces put together to achieve a certain shape or size is desirable. For example, this is important in the construction of a barbecue island or counter tops that will hold an object of a sizeable weight such as a grill or a sink. The top surfaces of the paneling material framing or holding the heavy object should have a good balance which is achieved when there is an equivalent weight to volume ratio resulting into an equivalent axial load supporting strength. Otherwise, with time, one panel may sag or buckle outward more than the other panel causing the object being held to tilt towards the direction of the panel with the less axial load supporting capacity. The stiffening material of English, as constructed and designed, restricts the cutting of the pieces to straight lines because cutting with curvature will produce pieces with non-equivalent weight to volume ratios. A curved cut will not produce equivalent or uniform pieces of stiffening material due to the crisscross design. Consequently, square or rectangular pieces can be obtained but not panels with curved edges. The crisscross design of the stiffening material also prevents the panel from being bent or shaped to produce curved outside surfaces since the lateral or vertical sides of the stiffening material braces its horizontal sides and vice-versa. Further, also because of the square crisscross design, the outside flat surfaces of the wall paneling material not directly supported but in between the directed convolutions of the stiffening material, would be deformable or even crack when accidentally bumped into or subjected to a blow because these flat surfaces are made of low or intermediate density bulk producing layers supported only by a flat sheet metal. The above properties of the bulk producing layers serve the purpose of English's invention because the foam layers should allow the plurality of hollow cell-containing fire extinguishing agents embedded into the foam layers to be readily accessible so these can readily disintegrate and emit fire-extinguishing gases when subjected to the heat of combustion. Because the foam is of a low or intermediate density, its soundproofing capability is reduced, as well.
U.S. Pat. No. 6,412,243 issued to Sutelan claims an ultra-lite modular composite building assembly. The material is lightweight, despite the number of hollow tubular sections formed by bonding together two panels with matching semi-circular shaped end sections, because these are made of plastic. These hollow tubular sections is identified as structural member in Sutelan which is equivalent to the stiffening material of English. If these hollow tubular sections were constructed with metal, it is doubtful if these can maintain its ultra-lite property. As in English above, it would also be difficult to cut the panel into pieces of equivalent weight to volume ratio unless cut at the notches (34) as proposed by Sutelan for modular panel subdivision (col. 6, lines 40-44). This aspect also precludes subdividing the panel with curved edges as stated above because it would be difficult to produce equivalent pieces. Bending or shaping the wall paneling is also difficult as evidenced by the necessity of devising corner connectors for these panels and even with the corner connectors, these can not form smoothly curved surfaces. Wall paneling material and wall paneling are used herein interchangeably to mean the same thing.
It is therefore an object of this invention to provide a lightweight wall paneling material that posses a superior strength to weight ratio.
It is also an object of this invention to provide a lightweight paneling material that has a high strength to weight ratio that can be subdivided into separate smaller panels of equivalent weight to volume ratio.
It is still an object of this invention to provide a lightweight paneling material that has a high strength to weight ratio that is pliable, that is, it can be curved or shaped without the need of pre-manufactured interlocking side connectors.
It is a further object of this invention to provide a lightweight wall paneling material that posses superior strength to weight ratio and high axial load supporting capacity.
It is still a further object of this invention to provide a non-deformable but shapeable, lightweight, wall paneling material having a superior strength with insulating and sound proofing properties that can be easily subdivided or cut into equivalent sections or pieces.
It is also still a further object of this invention to provide a wall paneling material that is inexpensive and can be assembled from commercially available parts.
A wall paneling material having a high strength to weight ratio and a lateral load bearing strength, comprising a centrally disposed sinusoidal corrugated sheet metal having two surfaces, each surface laminated to a foam material by a bonding sealant or instead of bonding, the sinusoidal corrugated sheet metal is molded between two foam materials. The sheet metal is usually galvanized to protect it from rusting. An isocyanate based bonding sealant has performed well for the wall paneling material described. Foam material as used herein refers to the foam materials usually used for construction and wall panels which are manufactured from a variety of synthetic polymers including polyvinyl chloride (PVC), polystyrene (PS), polyurethane (PU), polymethacrylamide, polyetherimide (PEI), and styreneacryolonitrile (SAN). Other foam materials that have similar performance and properties, although not specifically listed above can also be used. An expanded polystyrene material with a density of 1-2 lbs/ft3 is suitable for use for these wall paneling materials. The foam materials sandwiching the sinusoidal corrugated sheet metal can have an inner flat surface and an outer flat surface or an inner surface of matching sinusoidal corrugation extending in a direction opposite the sinusoidal corrugation of the sheet metal to allow direct surface to surface contact between the foam material and the corrugated sheet metal and an outer flat surface. The foam material can be bonded to the sinusoidal corrugated sheet metal at the tips and bases of the corrugation of the sheet metal thereby forming a multi-point interface. The wall paneling bonded in this manner are more pliable than those wall paneling where the foam materials are bonded to an entire surface of the sinusoidal corrugated sheet metal. The pieces cut from the wall paneling material have equivalent weight to volume ratios, equivalent lateral load bearing strength and uniform amount of sheet metal to foam ratio. It is also resistant to deformation caused by pressure applied at an outside flat surface of the foam material. The sinusoidal corrugation has a height of 0.5 to 1.5 and a tip to tip or base to base distance of 2-3 inches. The sinusoidal corrugated sheet metal has a thickness of 18-29 gauge. Commercially available channels can be attached on a side of the wall paneling material for connecting one wall paneling with another.
A process for assembling the wall paneling material described above comprises: applying a bonding sealant at an inner surface of a first layer of foam material; laying a first surface of a two surface sinusoidal corrugated sheet metal on top of the inner surface of the first layer of foam material; applying a bonding sealant on an exposed second surface of the sinusoidal corrugated sheet metal; laying a second layer of foam material on top of the exposed second surface of the sinusoidal corrugated sheet metal; and, compressing the first and second layer of foam material with the sinusoidal corrugated sheet metal in between with a pressure that bonds together the layers of foam material with the sinusoidal corrugated sheet metal without deforming or over compressing the foam materials. Another process is by molding the corrugated sheet metal in between two foam material, a process that would not require an external bonding sealant.
Other embodiments of the present invention will become readily apparent to those skilled in the art from the following detailed description, wherein it shows and describes only certain embodiments of the invention by way of illustration. As will be realized, the invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not as restrictive.
Aspects of the present invention are illustrated by way of example, and not by way of limitation, in the accompanying drawings, wherein:
The wall paneling 100 shown in
As shown in
Central to this invention is the shape of the corrugation. There are so many types of corrugation. This invention is specific to the corrugation shown in
A sinusoidal corrugated sheet metal of 29 gauge can be used and still produce a wall paneling material with superior lateral load bearing strength, withstanding stresses applied to them without buckling outward. Because of this property, these wall paneling materials also provide proper framing for the reception of windows, doors or appliances that are built-in or inserted into the walls. A sinusoidal corrugated sheet metal of 29 gauge with a height 19 of 0.5 inches and a tip to tip distance 20 of 2¾ inches is recommended for its high strength to weight ratio.
The thickness of the sinusoidal corrugated sheet metal can go as high as 18 gauge but the weight of the wall paneling per unit volume increases as the gauge rating decreases. Lower gauge sheet metal are also less pliable than those of a higher gauge. Use of two layers instead of one layer of corrugated sheet metal will increase the strength but will also increase the weight of the wall paneling material. The thickness of the sheet metal is generally dictated by the physical requirement of use and the over-all strength required. Gauge 29 would produce a more lightweight wall panel with sufficient load bearing strength.
The foam materials 12 are bonded on each side of the corrugated sheet metal with an isocyanate based sealant such as a sealant containing methylene bisphenyl isocyanate (MDI) sold by Dow Chemical. The sealant should be in a diluent or solvent that does not dissolve or affect the physical and chemical characteristics of the foam material. The sealant is sprayed or applied at the inner surface, 13 or 16 of a first layer 21 of foam material 12. A first surface 22 of a two surface sinusoidal corrugated sheet metal 11, one facing the inner surface 13 or 16, is laid on top of the first layer 21 of the foam material 12 after application of the sealant on the inner surface 13 or 16 on the first layer of foam material. The exposed second surface 23 of the sinusoidal corrugated sheet metal is then sprayed or applied with the sealant prior to laying the second layer 24 of foam material 12 on top of the exposed second surface 23 of the sinusoidal corrugated sheet metal 11. After laying the second layer 24 of foam material 12, the resulting layers are compressed with a pressure that will bond the layers together without cracking the foam materials. The above process of assembly can be automated. For wall paneling materials where only the tips or bases of the sinusoidal corrugation are bonded as shown in
The wall paneling are generally connected to each other with the use of channels 25 as shown in
While the embodiments of the present invention have been described, it should be understood that various changes, adaptations, and modifications may be made therein without departing from the spirit of the invention and the scope of the claims.
