Articles of stabilized fibrous construction material
Felted fibrous construction materials and articles formed therefrom. The felted fibrous construction material is adapted to provide adequate strength to permit construction of three dimensional structures by use of standard joining techniques such as screws, nails, glue and the like. Panels of the felted fibrous construction material also provide substantial impact resistance when used in storm shutter applications.
This application claims benefit of and priority from provisional application 60/497,636 filed Aug. 25, 2003, the contents of which are incorporated by reference herein in their entirety. This application is a continuation-in-part of copending U.S. patent application Ser. No. 10/367,634 in the name of Owens Jr. et al. having a filing date of Feb. 14, 2003, the contents of which are incorporated by reference herein in their entirety.
TECHNICAL FIELDThe present invention relates generally to lightweight, rigid construction materials and articles formed therefrom. More particularly, the invention relates to stabilized rigid construction panels formed from nonwoven fibrous materials having substantial stability, strength, flame resistance and resistance to degradation over time.
BACKGROUND OF THE INVENTIONIn a number of applications it is desirable to utilize construction materials having substantial rigidity and strength while nonetheless providing ease of assembly and aesthetically pleasing surface character. Such exemplary applications include bathroom vanities, counter tops, shelving, cabinetry and the like. In the past, such structures have typically been formed from materials such as wood, particle board, and high density plastics. While such materials provide the required rigid stability, they also tend to be relatively heavy. Moreover, the wood based materials require the harvesting of a substantial number of trees which may be environmentally undesirable.
SUMMARY OF THE INVENTIONThis invention provides advantages and alternatives over the prior art by providing construction materials for utilization in place of high weight board stock materials in various applications such as bathroom vanities, furniture, cabinetry, shelving, counters, and the like. Such material may also be used in place of wood and metal in the construction of exterior storm shutters and the like. More particularly, the present invention provides for materials of nonwoven fibrous construction having suitable rigidity for utilization in such applications. The nonwoven fibrous material is adapted to provide adequate strength to permit construction of three-dimensional structures by use of standard joining techniques such as screws, nails, glue, and the like if desired. The nonwoven fibrous material is also adaptable to accept various decorative surface treatments such as coatings, veneers, laminates and the like as may be desired to provide a decorative aesthetic appearance as well as water resistance. The weight of the fibrous nonwoven material is substantially less than that of current board stock materials. Moreover, the polymeric fibers forming the nonwoven fibrous materials are highly resistant to degradation over time.
BRIEF DESCRIPTION OF THE DRAWINGSThe present invention will now be described by way of example only with reference to the accompanying drawings which constitute a portion of the specification herein and in which:
While the present invention has been illustrated and generally described above and will hereinafter be described in connection with certain potentially preferred embodiments, procedures, and practices, it is to be understood that in no case is the invention to be limited to such illustrated and described embodiments, procedures, and practices. On the contrary, it is intended that the present invention shall extend to all alternatives, modifications, and equivalents as may embrace the principals of the present invention within the true scope and spirit thereof.
DESCRIPTIONReference will now be made to the drawings, wherein to the extent possible, like reference numerals are utilized to designate like components throughout the various views.
As will be appreciated, decorative and functional interior items such as bathroom vanities, furniture, cabinetry, shelving, counters, and the like formed from wood, particle board and similar construction materials are well known. In such constructions the wood or particle board may be provided with a surface treatment such as a resin coating, laminate or veneer to provide desired decorative and/or structural character.
The present invention contemplates that one or more structural layers in such constructions may be replaced with a material of fibrous construction adapted to provide structural integrity with substantially reduced weight. Various topical surface treatments may be provided to yield further rigidity as well as a moisture barrier. Surprisingly, it has been found that fibrous materials such as needlepunched felts may be constructed and treated to provide strength and stiffness suitable for use as a replacement for wood or particle board in these applications.
One exemplary practice for the production of a fibrous material suitable for formation into dimensionally stable construction materials for home interior components is illustrated schematically in
The blend of fibers 40 may include some percentage of a relatively low melting point constituent so as to permit the heat activated point bonding of fibers to one another at later processing stages. However, it is also contemplated that such low melting point constituent may be eliminated if desired. According to one contemplated practice, the blend of fibers 40 is made up of substantially entirely of polyester. By way of example only, one standard PET polyester staple fiber which is believed to be suitable is characterized by an average length of about 3 inches and a denier per filament rating of about 6 dpf. However, other staple fibers may likewise be utilized if desired.
In the event that a low melting point constituent is to be used, it is contemplated that about 10 percent to about 90 percent or more of the fibers 40 may be bi-component polyester fibers incorporating a sheath of low melting point CO-PET polyester around a standard PET polyester core. One exemplary core/sheath bi-component polyester fiber has a denier per filament rating of about 2.5 to about 5.5 dpf. As will be appreciated, upon the application of heat, the sheath material undergoes preferential flow and bonding to surrounding fiber constituents. Of course, other forms of low melting point material such as discrete fibers of low melting point material may also be utilized. Likewise, at least some percentage of the fibers 40 may be materials other than polyester. By way of example, it is contemplated that such materials may include nylon, polypropylene and the like.
As illustrated in
In one contemplated practice, needles in each of the needle looms 62, 63, 64 are generally triangular in shape with nine barbs per needle although other needle arrangements and designs may likewise be utilized if desired. The resultant product leaving the combining and densification station 60 is an enhanced density batting material 66. According to one contemplated practice, the enhanced density batting has a thickness in the range of about 0.45 to about 0.5 inches with a mass per unit area in the range of about 48.3 to about 51.2 ounces per square yard. Of course, it is to be understood that this enhanced density batting material 66 is exemplary only and that greater or lower thicknesses and/or different densities may likewise be utilized. In one contemplated practice, this enhanced density batting material is conveyed as a single layer to a heating press for compression and heat activation of any low melting point fiber constituents (if used) in a manner as will be described further hereinafter.
In the event that substantial thickness is desired in the article to be formed, it is contemplated that following formation of the enhanced density batting material 66, a plurality of rolls of such enhanced density batting material 66 may be conveyed to a laminate formation station 70 as illustrated schematically in
According to the practice illustrated in
While the adhesive material 72 may be any wet or dry adhesive as may be suitable to bind the adjacent layers of material together, it is contemplated that the adhesive material 72 will preferably be a dry adhesive in web form so as to promote ease of use of the adhesive in roll form and to further permit the relatively easy mechanical entangling to be carried out across the adhesive by the needle loom 74. The adhesive material is preferably of a nature such that it can be activated upon demand through application of a predetermined driving force such as heat, hot gas, chemical interaction, ultrasonic energy, radio frequency radiation waves and the like. Further, it is contemplated that the adhesive should provide necessary resistance to heat, humidity and chemical interaction so as to avoid any premature delamination. One such heat activated adhesive fabric is believed to be available under the trade designation SPUNFAB® adhesive fabric from Dry Adhesive Technologies Inc. having a place of business at Cuyahoga Falls, Ohio, USA. According to a potentially preferred embodiment, the adhesive is SPUNFAB® type PA 1001 polyamide spunbonded adhesive fabric. However, other such adhesive fabrics of polyester, polyolefin, and ternary systems are also contemplated.
Regardless of whether a single layer structure or multi-layer structure is desired, it is contemplated that either a single layer of the enhanced density batting material 66 or the multi-layer sandwich structure 76 as previously described will preferably be conveyed through a press 80 (
As will be appreciated, techniques other than needling may be used to form the nonwoven fibrous material. By way of example only, and not limitation it is contemplated that virtually any technique for forming nonwovens including spunbonding and the like as may be known to those of skill in the art may be utilized if desired.
If desired, localized bending may be provided by the incorporation of score lines extending partially but not completely through the material at locations where bending is desired. Preferably such score lines are generally “V” shaped with the apex projecting into the nonwoven fibrous material. However, other cross-sectional geometries may likewise be utilized if desired.
As indicated, it is contemplated that the nonwoven fibrous material 82 may be useful over a wide range of thicknesses. In this regard it is to be noted that if the panel is to have a thickness substantially greater than about ½ inch, the use of a multi-layer construction with an intermediate adhesive layer may be desirable.
According to one contemplated practice, the nonwoven fibrous material 82 (of either single layer or multi-layer construction) may be used alone or with an applied outer surface layer 85 which may be applied across one side (
In addition to providing desirable aesthetic character, the outer surface layers also provide enhanced rigidity thereby further facilitating use in applications where wood products have previously been used. In this regard, it is contemplated that resins or laminates may provide a controlled degree of stiffness depending on their thickness with thicker layers providing greater stiffness. Surface materials such as cured resins may also provide enhanced water resistance as may be desirable in many environments of use.
It is also contemplated that enhanced stiffness and dimensional stability may be provided by incorporating a sheet of woven or non-woven stabilizing material such as fiber or glass scrim or the like within at least one outer surface layer as previously described. By way of example only,
Importantly, the construction materials of the present invention are highly versatile and are much lighter in weight than prior construction materials for interior applications. In addition, unlike wood, the fibrous core material is highly resistant to degradation due to moisture damage and the like thereby potentially enhancing the useful life of the formed articles.
By way of example only, a cabinet structure 90 such as may be used in a kitchen or as a bathroom vanity is illustrated in
It has also been found that the fibrous material 82 may be used in the construction of impact resistant exterior protective structures such as storm shutters and the like for use at exterior locations of a fixed or mobile dwelling structure. By way of example only, at
Unlike wood which tends to splinter on impact and metal which may become dented, the storm shutters 105 formed with cross-sections of nonwoven fibrous material 82 either with or without stabilizing layers 87 and/or outer surface layers 85 tend to absorb impacts with minimal damage even when the impacting object is traveling at a substantial velocity such as may take place in a hurricane or other similar storm condition. It is believed that this benefit derives at least in part from the ability to dissipate force over the wide surface area formed by nonwoven fibrous material 82. Moreover, if the storm shutters 105 become dislodged from the dwelling 100, it is contemplated that their lighter weight may reduce the potential for secondary damage to other structures as they are conveyed by the wind.
It is to be understood that while the present invention has been illustrated and described in relation to several potentially preferred embodiments, constructions, and procedures that such embodiments, constructions, and procedures are illustrative and exemplary only and that the present invention is in no event to be limited thereto. Rather it is contemplated that modifications and variations embodying the principles of the present invention will no doubt occur to those of ordinary skill in the art. It is therefore contemplated and intended that the present invention shall extend to all such modifications and variations as may incorporate the broad aspects of the present invention within the true scope and spirit thereof.
Claims
1. A three dimensional cabinet structure comprising a plurality of panels adapted to be adjoined to one another such that said panels define a three dimensional structural body of said cabinet structure, wherein at least a portion of said panels comprise a fibrous felted material, wherein said fibrous felted material comprises a plurality of entangled polymeric fibers and wherein at least a portion of said entangled polymeric fibers are melt fused together such that a plurality of fiber to fiber fusion bonding points are distributed within said fibrous felted material.
2. The invention as recited in claim 1, wherein said fibrous felted material consists essentially of a blend of entangled polyester fibers.
3. The invention as recited in claim 2, wherein the blend of entangled polyester fibers includes a first portion of polyester fibers characterized by a first melting point and at least a second portion of polyester fibers comprising a low melting point polyester constituent characterized by a second melting point which is lower than the first melting point.
4. The invention as recited in claim 3, wherein at least a percentage of said second portion of polyester fibers comprise a sheath of said low melting point polyester constituent disposed in surrounding relation to a core of polyester having a melting point greater than the low melting point polyester constituent.
5. The invention as recited in claim 3, wherein the low melting point polyester constituent is characterized by a melting point of less than about 340 degrees Fahrenheit.
6. The invention as recited in claim 1, wherein the cabinet structure comprises at least one panel comprising of said fibrous felted material forming a top surface of the cabinet structure and a plurality of panels of said fibrous felted material forming sides of the cabinet.
7. The invention as recited in claim 6, wherein the cabinet structure includes at least one door comprising at least one panel comprising said fibrous felted material.
8. The invention as recited in claim 6, wherein the cabinet structure includes at least one drawer comprising at least one panel comprising said fibrous felted material.
9. The invention as recited in claim 1, wherein at least a portion of the panels comprising said fibrous felted material further comprise a non-fiber outer surface layer of cured resin.
10. The invention as recited in claim 1, wherein at least a portion of the panels comprising said fibrous felted material further comprise at least one layer of stabilizing material.
11. The invention as recited in claim 10, wherein at least a portion of said fibrous felted material is disposed between a pair of opposing layers of stabilizing material at least partially covered with a cured resin.
12. An exterior storm shutter for a dwelling comprising at least one panel comprising fibrous felted material wherein said fibrous felted material comprises a plurality of entangled polymeric fibers and wherein at least a portion of said entangled polymeric fibers are melt fused together such that a plurality of fiber to fiber fusion bonding points are distributed within said fibrous felted material.
13. The invention as recited in claim 12, wherein said fibrous felted material consists essentially of a blend of entangled polyester fibers.
14. The invention as recited in claim 13, wherein the blend of entangled polyester fibers includes a first portion of polyester fibers characterized by a first melting point and at least a second portion of polyester fibers comprising a low melting point polyester constituent characterized by a second melting point which is lower than the first melting point.
15. The invention as recited in claim 14, wherein at least a percentage of said second portion of polyester fibers comprise a sheath of said low melting point polyester constituent disposed in surrounding relation to a core of polyester having a melting point greater than the low melting point polyester constituent.
16. The invention as recited in claim 15, wherein the low melting point polyester constituent is characterized by a melting point of less than about 340 degrees Fahrenheit.
17. The invention as recited in claim 12 wherein at least a portion of the panels comprising said fibrous felted material further comprise a non-fiber outer surface layer of cured resin.
18. The invention as recited in claim 12 wherein at least a portion of the panels comprising said fibrous felted material further comprise at least one layer of stabilizing material.
19. The invention as recited in claim 18, wherein at least a portion of said fibrous felted material is disposed between a pair of opposing layers of stabilizing material at least partially covered with cured resin.
Type: Application
Filed: Aug 25, 2004
Publication Date: Jul 19, 2007
Inventors: Timothy Baldwin (Tryon, NC), Susan Crow (Simpsonville, SC), Jerry Owens (Boiling Springs, SC)
Application Number: 10/925,808
International Classification: A47C 19/00 (20060101); A47C 23/00 (20060101);