USRE45978E1 - Formable fused polymer panels containing light refracting films - Google Patents
Formable fused polymer panels containing light refracting films Download PDFInfo
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- USRE45978E1 USRE45978E1 US14/029,177 US200814029177A USRE45978E US RE45978 E1 USRE45978 E1 US RE45978E1 US 200814029177 A US200814029177 A US 200814029177A US RE45978 E USRE45978 E US RE45978E
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Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
- G02B5/285—Interference filters comprising deposited thin solid films
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1028—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina by bending, drawing or stretch forming sheet to assume shape of configured lamina while in contact therewith
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1039—Surface deformation only of sandwich or lamina [e.g., embossed panels]
- Y10T156/1041—Subsequent to lamination
Definitions
- the present invention is a U.S. National Stage Application corresponding to PCT Application No. PCT/US08/54854, filed on Feb. 25, 2008, entitled “FORMABLE FUSED POLYMER PANELS CONTAINING LIGHT REFRACTING FILMS,” which claims the benefit of priority to U.S. Provisional Patent Application No. 60/891,717, filed on Feb. 26, 2007, also entitled “FORMABLE FUSED POLYMER PANELS CONTAINING LIGHT REFRACTING FILMS.”
- the entire content of each of the aforementioned patent applications is incorporated herein by reference.
- Implementations of the present invention relate generally to systems, apparatus, and methods for creating formable panels with light refraction properties.
- Dichroism generally refers to a property in which an object absorbs or filters one of two plane-polarized components of transmitted light more strongly than the other, as well as, or, in the alternative, when an object differentially reflects or transmits light. Objects that have these types of properties, or can otherwise create these types of effects, are referred to as being “dichroic.”
- dichroic panels In the field of architectural design, there has been some recent interest in panels that exhibit dichroic properties (i.e., “dichroic panels”) due to any number of both aesthetic and functional reasons (or both).
- a manufacturer will typically attach one or more light refracting films (or “dichroic films”) to a transparent or translucent substrate, such as a translucent or transparent glass or acrylic panel. The manufacturer can then use the dichroic panel as a window, wall, door, partition, or even as a treatment to existing structure.
- present methods for manufacturing dichroic panels suffer from a number of disadvantages, and often lead to products with relatively poor quality.
- one conventional example of creating dichroic panels include those related to dichroic glass panels.
- a manufacturer will typically create a dichroic glass panel by nesting a dichroic film between two outer glass substrates (glass panels/sheets), and two bonding film layers (or “tie layers”).
- the tie layers are typically comprised of thermoplastic polyurethane (TPU), ethylene vinyl acetate (EVA), or polyvinyl butyral (PVB).
- TPU thermoplastic polyurethane
- EVA ethylene vinyl acetate
- PVB polyvinyl butyral
- a manufacturer may deposit a dichroic metallized layer or coating on the surface of a glass substrate.
- the dichroic surface of the glass sheet is unprotected, and the available sizes are quite limited.
- glass substrates generally tend to be fairly difficult to work with.
- the density of typical glass panels can result in a substantial amount of hardware and equipment not only to handle the glass during preparation and fabrication, but also to support the weight of the finished panel during installation.
- dichroic glass panels tend to be relatively high cost.
- the fragility and brittleness of glass panels make the use of dichroic glass panels quite limited.
- lamination of dichroic films in glass can reduce the propensity of the glass panel to shatter, lamination does not eliminate the chance that the glass lites may become cracked or spalled in the event of impact.
- the brittle nature of laminated glass creates difficulty in fabrication, and tends to impose limitations to the extent that most fabrication of the laminated panels typically needs to be performed in a glass shop, rather than onsite at the point of installation. Specifically, it is nearly impossible to form glass panels into other shapes after processing them to create the dichroic panels.
- one conventional dichroic acrylic panel comprises a dichroic film that is adhered to a single outer surface of an extruded acrylic sheet.
- a panel can offer a unique aesthetic, but tends to be limited in its application of use due to the dichroic film being positioned on the outer surface.
- the positioning of the dichroic film on the outer surface leaves the dichroic film susceptible to scratching, marring or contamination that can be unsightly.
- both the dichroic film and substrate can contribute to other types of problems with this kind of dichroic panel.
- conventional light refracting/dichroic films which typically comprise a combination of several different ultra-thin substrate films formed together, tend not to be UV-stable.
- one of the underlying substrate films used to create conventional dichroic films comprises a non-UV-stabilized polyester. Due to lack of UV-stability in the light refracting films, therefore, dichroic panels comprising dichroic film attached to an outside surface of an acrylic substrate cannot ordinarily be used in exteriors without adversely affecting the dichroic surface.
- acrylic itself tends to have relatively poor flammability performance, and local building codes often prohibit use of acrylic and other flame-propagating materials to be installed as interior finish applications.
- the acrylic and dichroic film combination as described above tends to produce a mirror-like reflectance, which, in context with bright lights or daylight, can have a blinding effect on an observer.
- At least one disadvantage is that the liquid adhesive tends to distort the dichroic interlayer, at least in part since it can be difficult to remove air bubbles trapped in the liquid adhesive, and between the dichroic film and acrylic substrate(s). These and other imperfections caused by the liquid adhesive have a tendency to hinder the intended aesthetic properties of the panel, thereby limiting the panel to use in relatively low-end applications.
- At least another disadvantage is that such a panel will have little or no post-manufacturing formability (i.e., limited to the shape of the initial acrylic substrates).
- the use of liquid/contact adhesives tends to limit the amount of bending and forming that the resulting panel can endure without delaminating.
- acrylic panels means that the resultant panel cannot ordinarily be used as a building material under typical building codes that employ flammability constraints.
- a dichroic resin panel comprises one or more dichroic films that have been laminated between a plurality of opposed resin substrate sheets using a specially-selected combination of heat and pressure in a lamination process.
- the dichroic resin panel also comprises one or more tie layer films (e.g., TPU) used between the dichroic film(s) and resin substrates during lamination, which helps adhere the various layers at lower temperatures without distorting any intended aesthetic qualities.
- TPU tie layer films
- a dichroic resin panel in accordance with an implementation of the present invention can include a substantially translucent first resin substrate layer.
- the dichroic resin panel can also include a substantially translucent second resin substrate layer that registers (e.g., corresponds dimensionally) with the first resin layer.
- the dichroic resin panel can include one or more light refracting film layers laminated between the first and second resin layers. The light refracting film is embedded between the first and second resin layers without material defect.
- the combination of these materials in the resulting end product is at least partially malleable after a lamination process.
- a method of manufacturing a post-formable, dichroic resin panel in accordance with an implementation of the present invention can include preparing a dichroic laminate assembly that includes one or more light refracting films and one or more tie layers interposed between a plurality of resin substrates.
- the method can also include heating the dichroic laminate assembly in a lamination apparatus to a laminating temperature, such as a temperature of no more than about 250° F. to about 260° F.
- the one or more tie layers will then soften or melt between the plurality of resin substrates.
- the method can include cooling the dichroic laminate assembly.
- the dichroic laminate assembly comprises a substantially unitary resin panel.
- the method can involve removing the unitary resin panel from the lamination apparatus.
- FIG. 1A illustrates a schematic diagram of a dichroic laminate assembly in accordance with an implementation of the present invention
- FIG. 1B illustrates a schematic diagram of a formed, dichroic resin panel using the laminate assembly of FIG. 1A ;
- FIG. 2A illustrates a schematic diagram of a dichroic laminate assembly in accordance with another implementation of the present invention, in which one or more of the substrates are embossed or textured;
- FIG. 2B illustrates a schematic diagram of a formed, dichroic resin panel using the laminate assembly of FIG. 2A ;
- FIG. 3 illustrates a flowchart comprising a plurality of steps in a method for preparing a dichroic resin panel in accordance with an implementation of the present invention.
- a dichroic resin panel comprises one or more dichroic films that have been laminated between a plurality of opposed resin substrate sheets using a specially-selected combination of heat and pressure in a lamination process.
- the dichroic resin panel also comprises one or more tie layer films (e.g., TPU) used between the dichroic film(s) and resin substrates during lamination, which helps adhere the various layers at lower temperatures without distorting any intended aesthetic qualities.
- TPU tie layer films
- dichroic resin panels in accordance with the present invention can be produced using any number of polymeric resin (or “resins”) substrate materials.
- resin substrate materials can include resin sheets comprising any number or combination of copolyesters (e.g., PETG, PET, PCTG), etc., poly-methyl methacrylates (PMMA, or “acrylic”), polycarbonate, styrene, polyvinyl chloride (PVC), polyurethanes, or mixtures thereof.
- these materials provide the resulting dichroic resin panels with benefits of impact resistance, flammability, and weatherability, particularly as compared with conventional counterparts.
- copolyesters such as PETG, and polycarbonate material, tend to be much less flammable than acrylic counterparts, though still sufficiently structural for use as a building material.
- copolyesters and polycarbonates can also be configured in a wide variety of ways with relative ease to have enhanced fire resistance.
- the materials and processes described herein result in panels that can be fabricated and machined with basic fabrication tools, even such as those suitable for working with wood. Still further, the materials and processes described herein provide a manufacturer with the ability to manipulate and control reflection qualities of a given dichroic panel, such as to minimize undesirable reflection while still providing a dichroic effect. Yet still further, the materials and processes described herein allow a manufacturer to create dichroic resin panels that have curves, and that can be finished with deep embossing and/or textures.
- dichroic “resin” panels As a preliminary matter, frequent reference is made herein commonly to dichroic “resin” panels.
- implementations of the present invention can also be applied to other substrate materials, such as glass substrates used in the panels, to thus create inventive dichroic “glass” panels that still represent an advantage in the art.
- a manufacturer can substitute glass substrates in place of resin substrates, such as when preparing the dichroic panel assembly for use in the autoclave method described herein.
- implementations of the present invention provide advantageous manufacturing methods for virtually any dichroic panel of virtually any substrate, where the resulting panel that can be used in a wide range of environments, and is generally superior to comparable conventional dichroic panels.
- FIG. 1A illustrates a schematic diagram of a laminate assembly 10 a that has been prepared in accordance with an implementation of the present invention.
- a laminate assembly 10 (a/b) can comprise at least one dichroic film 20 that has been positioned between a plurality of resin substrates 5 (a/b).
- the resin substrate can comprise copolyester, acrylic (PMMA), or polycarbonate base layers, with acrylic (PMMA) and polycarbonate being preferred, and copolyester being most preferred.
- the resin substrates 5 (a/b) can also be substituted in whole or in part with comparable glass substrates.
- the thickness of any single base layer/substrate 5 a can range from about 0.030′′ to about 5.0′′, preferably about 0.060′′ to about 2.0′′.
- FIG. 1A also shows that the laminate assembly 10 (a) can comprise one or more “tie layers” 15 used to bond the substrate layers to the dichroic film and/or to another substrate.
- a tie layer 15 can comprise materials such as ethyl-vinyl acetate (EVA), ethylene-methyl acrylate (EMA), or thermoplastic polyurethane (TPU).
- EVA ethyl-vinyl acetate
- EMA ethylene-methyl acrylate
- TPU thermoplastic polyurethane
- TPU is the preferred material for tie layer 15 , at least in part since TPU is a self-priming, polyether based, low modulus aliphatic substance that is particularly suited for one or more of the results described herein (e.g., bond/lamination strength, and flexibility during additional forming).
- the tie layer 15 thickness will be several microns thick, and can range from about 0.005′′ to 0.125′′, preferably 0.010′′ to 0.060′′.
- the manufacturer can choose any particular tie layer material based on bond strength of the resulting dichroic resin panel, and that tie layers other than TPU may be preferred for certain applications.
- FIG. 2A illustrates an alternate implementation of laminate assembly 10 , designated as 10 b.
- laminate assembly 10 b is configured more particularly for use with textured or embossed surfaces (i.e., previously textured or embossed surfaces).
- FIG. 2A shows that laminate assembly 10 b comprises essentially the same materials (and ordering) as shown in FIG. 1A , albeit differing with respect to substrates 5 .
- FIG. 2A shows that the outer substrate layers of laminate assembly 10 b comprise textured/embossed substrates 5 b, and that laminate assembly 10 b further comprises one or more non-textured/non-embossed resin substrates 5 a positioned therebetween about the dichroic film 20 .
- both FIGS. 1A and 1B illustrate use of a light refracting film layer (referred to herein as “dichroic film layer 20 ”), which is positioned in approximately the center position between at least two resin layers.
- the dichroic film 20 comprises a reflective, non-image bearing light refracting film having a high thermal stability, and low shrinkage characteristics.
- the dichroic film 20 layer comprises a plurality of resin sheets that are only a few microns thick, and that have been previously bonded together (to create light refracting/dichroic film composite) before being inserted into the laminate assembly.
- FIG. 1A also shows that dichroic film 20 can be positioned between opposing resin substrates 5 a
- FIG. 2A shows that dichroic film 20 can be positioned between opposing resin substrates 5 a and 5 b.
- FIGS. 1A and 1B both show that each layer in the given laminate assembly 5 a-b can be positioned to be approximately centered with respect to the next adjacent layer (e.g., 5 , 15 ). Such specific centering between layers (or with respect to a particular adjacent surface), however, is not necessarily required. Rather, the dichroic film 20 need only be between the resin substrates 5 (a/b), and not positioned on an outer surface of an outer substrate (e.g., 5 a/ 10 a; 5 b/ 10 b). Furthermore, a manufacturer can position multiple such dichroic film 20 layers throughout the given laminate assembly 10 , though only one dichroic film layer in either assembly 10 a or 10 b is shown herein for purposes of convenience.
- each layer in the given laminate assembly 10 need not necessarily match in terms of length/width from one layer to the next (such as illustrated).
- a manufacturer can use a dichroic film 20 layer that is oversized between about 0.5′′-6′′ at the edges compared with an adjacent substrate layer (e.g., 5 a/ 5 b), preferably about 1′′-2′′ oversized at the edges. In at least one implementation, this allows the dichroic film 20 to hang over the edges of any substrate 5 (a/b) and/or bonding/tie layer ( 15 ). At least one reason a manufacturer may want to use an oversized dichroic film layer in this manner is to aid in the removal of air that might otherwise be caught between substrates 5 (a/b) during the lamination processes.
- the manufacturer can then subject the laminate assembly to any number of different lamination processes.
- the manufacturer forms the resin panel end product using a lamination apparatus such as a conventional hot press (not shown), using specifically selected temperatures and pressures that are optimized for melting or softening the given tie layer (causing adhesion) 15 without damaging the dichroic film 20 and/or resin substrates 5 .
- the manufacturer forms the resin panel end product using a lamination apparatus such as an autoclave (not shown), again using temperatures and pressures that are optimized for melting or softening the tie layer 15 (to cause adhesion).
- a manufacturer can use either type of laminating apparatus (i.e., the hot press or autoclave) for any number of reasons within the scope of the present invention, and obtain a superior dichroic resin panel ( 25 a-b).
- an autoclave-involved method generally allows a manufacturer to form a resulting dichroic resin panel product (i.e., cause lamination between the layers) at lower temperature and pressures.
- the comparatively lower temperatures and pressures during lamination will tend to minimize potential damage to surface finishes on a given substrate (e.g., 3 , 5 b), and/or minimize damage to the dichroic film 20 .
- the lower temperatures and pressures can also minimize the stresses in the adhesion between substrates 5 and dichroic film 20 , which can help avoid delamination during subsequent steps or uses.
- an autoclave often uses a longer cool-down time, which can prevent radius bowing that can sometimes occur when layers of different thickness (i.e., “unbalanced” lay-ups) cool down at different rates.
- autoclave-involved processes used herein can include a vacuum step, which allows a manufacturer to remove air from the panel 25 (a-b), and thus manufacture the panel essentially free of air bubbles.
- a vacuum step allows a manufacturer to remove air from the panel 25 (a-b), and thus manufacture the panel essentially free of air bubbles.
- FIG. 3 illustrates a flowchart for preparing one or more dichroic panels in accordance with an implementation of the present invention.
- the flowchart branches with alternate steps to highlight specific implementations of using a specific lamination apparatus such as a hot press or an autoclave to complete the lamination process.
- the steps illustrated in FIG. 3 are discussed more fully below with respect to the components and assemblies shown in FIGS. 1A-2B .
- FIG. 3 shows that a method of preparing a dichroic resin panel 25 (a/b) that is formable after lamination, contains no air bubbles, and otherwise maintains intended dichroism properties without damage to the dichroic film before, during, or after assembly (e.g., during use), can comprise a step 300 for preparing a laminate assembly (or “dichroic laminate assembly”).
- a laminate assembly or “dichroic laminate assembly”.
- FIGS. 1A and 1B show that the manufacturer can prepare a dichroic laminate assembly 10 that comprises a dichroic film 20 (or light refracting film) positioned between a plurality of (at least two opposing) resin substrates 5 a in a stack formation.
- the manufacturer can also position one or more tie layers 15 between the dichroic film 20 layer and the resin substrates 5 a.
- the resin substrates 5 a comprise a copolyester material, while, in another implementation, the resin substrates 5 a comprise a polycarbonate or acrylic material, or even mixtures thereof. In general, the choice in substrate 5 material will depend on the intended use of the resulting dichroic resin panel 25 (a/b).
- a manufacturer can additionally or alternatively position yet additional resin substrates in the assembly.
- resin substrates 5 a/b
- a manufacturer may desire to create a thicker gauge end-product, and thus each additional resin substrate added to the assembly will ultimately add to the gauge of the end-product.
- the manufacturer might implement these additional resin substrates 5 a when using substrates with outer surfaces that have already been embossed or textured 3 (e.g., 5 b).
- the outer resin substrates 5 b since the outer resin substrates 5 b have already been heat-treated to some extent in order to apply the embossing/texture 3 , the outer panel substrates 5 b may be more sensitive to the additional heat in the laminating process, and thus may bond less favorably to the dichroic film 20 during lamination.
- a manufacturer may be able to stabilize the laminate assembly 10 b by adding yet additional resin substrates 5 a (that have not been heat-treated, such as those that are free of embossing or texturing) within the assembly 10 b.
- FIG. 2B shows a laminate assembly 10 b comprising opposing outer substrates 5 b having one or more embosses or textures 3 , a plurality of non-embossed or non-textured substrates 5 a positioned therein, as well as one or more dichroic film layers 20 positioned between the non-textured substrates 5 a.
- FIG. 3 also shows that the manufacturer can then perform one or more alternate steps to cause adhesion between the various layers, depending on whether using an autoclave-involved process, or using a hot press-involved process as the lamination apparatus.
- steps 310 , 320 , 330 , and 340 relate particularly to autoclave-involved processes
- steps 315 , 335 , and 345 relate particularly to processes involving a hot press.
- FIG. 3 shows that the method for creating the dichroic resin panel can further comprise a step 315 of positioning the dichroic laminate assembly in a hot press.
- the manufacturer upon preparing a laminate assembly, such as assembly 10 a or 10 b (or the like), the manufacturer then positions the assembly 10 (a/b) in a hot press. In one implementation, this further involves the manufacturer positioning one or more pressure pads about the assembly 10 (a/b), placing the assembly on a tray (e.g., an aluminum plate), and positioning the tray within the hot press.
- a tray e.g., an aluminum plate
- FIG. 3 additionally shows that the method can comprise a step 335 of heating the press to a laminating/adhesion temperature, such as about 250° F. to about 260° F., and a pressure of about 70 psi to about 150 psi, preferably about 90 psi to about 110 psi.
- a laminating/adhesion temperature such as about 250° F. to about 260° F.
- a pressure of about 70 psi to about 150 psi, preferably about 90 psi to about 110 psi.
- this temperature and pressure range is generally sufficient to melt or soften the various tie layers 15 in the assembly 10 , and cause contact-based adhesion. This adhesion will thus occur between the resin substrates 5 (a/b) and the dichroic film 20 , and/or between the textured resin substrates 5 b to the non-textured resin substrates 5 a, and so forth.
- the manufacturer maintains this temperature in the hot press for about 10 minutes.
- FIG. 3 shows that the method using the hot press can comprise a step 345 of cooling the assembly.
- the manufacturer can then cool the assembly, such as by moving the assembly 10 (a/b) to a cool press and holding at a much lower temperature (e.g., about 90° F. to about 110° F., using the same pressure as the hot cycle).
- this also involves the manufacturer applying a texture or embossing to the outer surface of the assembly (e.g., 25 (a/b)).
- the manufacturer can apply texture or embossing paper to either or both outer surfaces of the laminate assembly 10 a, and then position the assembly 10 a into the cool press.
- the manufacturer applies the texture or embossing paper to both sides of the laminate assembly 10 a prior to inserting the laminate assembly 10 a into the hot press.
- the texture/embossing paper would already be found in the assembly 10 a, and the manufacturer would simply move the entire assembly to the cold press.
- FIG. 3 shows that the method involving the autoclave can comprise an initial step 310 of placing the dichroic laminate assembly in a vacuum bag and sealing the bag.
- the manufacturer positions the assembly in a vacuum bag.
- the manufacturer will position only one laminate assembly 10 (a/b) in any given vacuum bag, though this is not necessarily required.
- an autoclave can typically take many different vacuum bag/laminate assembly combinations (e.g., of 4′ ⁇ 8′ sheets) at a time.
- a manufacturer will typically prepare a plurality of such assemblies 10 in accordance with the steps 310 , 320 , 330 , and 340 .
- the manufacturer can seal the vacuum bag.
- the step of sealing the vacuum bag will also involve using a vacuum to remove air from the bag (once sealed).
- removing air from the vacuum bag is yet another way in which the manufacturer can help ensure that there are no air bubbles in the dichroic resin panel end product. Specifically, removing air from the vacuum bag removes or reduces the chance that such air would otherwise become trapped between assembly layers during lamination (otherwise resulting in air bubbles).
- FIG. 3 further shows that the method involving the autoclave can comprise a step 320 of placing the vacuum bag in the autoclave.
- the manufacturer takes each of the one or more vacuum bags comprising corresponding one or more dichroic laminate assemblies, and positions them in the autoclave. In one implementation, this may involve positioning a plurality of vacuum bags in or on one or more racks, so that several different dichroic laminate assemblies 10 can be processed at the same time.
- FIG. 3 shows that the method involving the autoclave can comprise a step 330 of raising the autoclave to a temperature that is less than about 250° F. to about 260° F. (i.e., a lamination temperature), preferably about 210° F. to about 250° F., more preferably a temperature that is on the low end of this range when using TPU, e.g., about 210° F. to about 230° F., and raising the pressure to about 150 psi to about 170 psi.
- a lamination temperature preferably about 210° F. to about 250° F., more preferably a temperature that is on the low end of this range when using TPU, e.g., about 210° F. to about 230° F.
- TPU e.g., about 210° F. to about 230° F.
- each vacuum bag can receive additional internal pressure due to air removed from the vacuum bag.
- the autoclave maintains a bit of a higher and more uniform internal pressure since it is a closed system (unlike most hot presses, which typically apply pressure only directly via platens).
- the higher pressures inherent with the autoclave can result in bonding of the laminate assembly 10 (a/b) at lower temperatures (i.e., compared with the hot press, or less than 250° F. to 260° F.).
- FIG. 3 shows that the method involving the autoclave can comprise yet another step 340 of cooling the assembly.
- a manufacturer turns off (or down) the temperature of the autoclave, and awaits the cooling to an appropriate temperature (e.g., about 90° F. to about 110° F., maintaining approximately the same pressure used during heating).
- the autoclave tends to cool at a much slower rate than is otherwise possible using the cold press described above in step 345 .
- this delay in cooling can provide a number of advantages. As described herein, at least one advantage is that the slower cooling helps prevent the bonded layers (i.e., panel 25 (a/b)) in the assembly from bowing or delaminating.
- FIG. 3 shows that both the methods for both types of lamination apparatus can include a final step 350 of removing the finished panel.
- the manufacturer can then remove them from the autoclave or from the cold press, as appropriate.
- each of the layers in the laminate assembly will have become fully bonded to the next layer in the assembly, such that each laminate assembly 10 will resemble a finished, dichroic resin panel end product 25 (a/b).
- the finished panel is a substantially unitary resin panel, with each layer having been bonded to the next adjacent layer to the point the layers are almost indistinguishable from the next.
- the resulting panel 25 (a/b) will still be sufficiently soft that the manufacturer can further form the panel to any number of shapes.
- the manufacturer can rest a softened panel that has just been cooled down on top of one or more molds into which the given panel will conform.
- the manufacturer can perform this forming step within an autoclave, for example, such as during the cooling step (rather than after the cooling step).
- the manufacturer would typically rest the resulting product on one or more molds or forms after removing the resin panel from the cold press.
- FIGS. 1A-3 and the corresponding text illustrate or describe a number of schematics, components, and mechanisms for preparing or creating an aesthetically pleasing, durable, high-end dichroic panel.
- These panels created with the materials and mechanisms described herein will not delaminate, do not contain air bubbles, and will maintain the integrity, look, and/or feel of the dichroic film interlayer for as long as the panel 25 (a/b) is used.
- These panels are also highly formable, and can thus be used in any number of structural and/or aesthetic applications.
- the resulting dichroic resin panel end-products can have the same look and quality as glass counterparts, without the same manufacturing/handling difficulties.
- Textured, dichroic resin panels comprising the following laminate assembly (e.g., 10 a), shown in Table 1, were prepared as trials.
- the assembly in accordance with Table 1 was placed in a hot press.
- the hot press was then heated to a temperature of from about 250° F. to about 260° F.
- the assembly was maintained in the hot press at this temperature for about 10 minutes at a pressure of about 70 psi to about 150 psi, preferably about 90 psi to about 110 psi.
- the assembly was then removed from the hot press and placed in a cool press (reducing temperature to about 90° F. to about 110° F., and using similar pressure as the heating step), along with texture paper (sandstone-matte) on both sides of the assembly in order to apply a matte texture to the outer surfaces of the substrates.
- the laminate assembly was removed.
- the bond strength in the overall assembly was deemed sufficient to form a unitary panel (e.g., 25 (a/b)).
- the laminate assembly in accordance with Table 1 comprised a finished dichroic resin panel (e.g., 25 (a/b)) with excellent structural and aesthetic properties.
- Textured, dichroic resin panels comprising the following laminate assembly (e.g., 10 a), shown in Table 2, were prepared as trials.
- the prepared laminate assembly in accordance with Table 2 was placed in a hot press.
- the hot press was then heated to a temperature of from about 250° F. to about 260° F., and a pressure of from about 70 psi to about 150 psi, preferably about 90 psi to about 110 psi.
- the assembly was maintained in the hot press at this temperature and pressure for about 10 minutes.
- the assembly was then removed and placed in a cool press with an embossing mold to impart a deep embossed texture on the top surface. Further, sandstone-matte texture paper was applied to the back surface to provide a desired surface finish for the flat side of the assembly.
- the laminate assembly was removed.
- the bond strength in the overall assembly was deemed sufficient to form a unitary panel (e.g., 25 (a/b)).
- the laminate assembly in accordance with Table 2 also comprised a finished dichroic resin panel (e.g., 25 (a/b)) with excellent structural and aesthetic properties.
- Textured, dichroic resin panels comprising the following laminate assembly (e.g., 10 a), shown in Table 3, were prepared as trials.
- the laminate assemblies ( 10 a) were prepared with full size 4′ ⁇ 8′ sheets in the substrate ( 5 a) portion. Nevertheless, several different laminate assemblies were prepared with varying thicknesses (e.g., Example 4) and with varying finishes.
- the assemblies were each positioned in an autoclave at specific times, temperatures, and pressures.
- the temperatures used in the autoclave were no higher than from about 250° F. to about 260° F., and, in most cases, were much lower.
- the temperature was raised to between about 210° F. to about 250° F.
- the pressure was raised to between about 110 psi to about 170 psi. This temperature and pressure was then maintained for about 90 minutes to effect bonding between layers.
- the laminate assembly was removed.
- the bond strength in the overall assembly was deemed sufficient to form a unitary panel (e.g., 25 (a/b)).
- the laminate assembly in accordance with Table 3 comprised a finished dichroic resin panel (e.g., 25 (a/b)) with excellent structural and aesthetic properties.
- Textured, dichroic resin panels comprising the following laminate assembly (e.g., 10 a), shown in Table 4, were prepared as trials.
- Example 4 the laminate assemblies ( 10 a) of Example 4 were prepared with full size 4′ ⁇ 8′ sheets/substrates ( 5 a). In addition, the 4′ ⁇ 8′ sheets/substrates ( 5 a) were prepared with embossed textures prior to creating the assemblies ( 10 a).
- the assemblies were each positioned in an autoclave at specific times, temperatures, and pressures. As with Example 3, one will appreciate that the temperatures used in the autoclave were no higher than from about 250° F. to about 260° F., and, in most cases, were much lower (e.g., about 210° F. to as much as 250°, using pressure of about 110 psi to about 170 psi). After sufficient cooling time in the autoclave (e.g., at a temperature of about 90° F. to about 110° F., preferably about 105° F., and similar pressure as the heat cycle), the laminate assembly was removed. The bond strength in the overall assembly was deemed sufficient to form a unitary panel (e.g., 25 (a/b)).
- the laminate assembly in accordance with Table 4 comprised a finished dichroic resin panel (e.g., 25 (a/b)) with excellent structural and aesthetic properties.
- dichroic resin panel that represents a significant advantage in the art.
- the dichroic resin panels constructed in line with the materials and mechanisms described herein are sufficiently durable and aesthetic for a wide range of uses.
- the materials described herein for the tie layers and the dichroic film do not absorb water.
- the dichroic panels (resin or glass) made in accordance with the present invention do not have to be edge sealed in humid or aqueous environments.
- dichroic resin panels in accordance with the present invention are relatively easy to handle and manufacture, and also much easier to transport and assemble in this range of uses. Such uses include both interior and exterior applications, even in the presence of stringent building code requiring minimum flammability standards, and/or where the panels may be exposed to relatively severe external elements.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Laminated Bodies (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
Description
TABLE 1 | |
Layer # | Description |
1 | 0.060″ PETG - sandstone-matte finish |
2 | 0.025″ DUREFLEX A4700 TPU (tie layer) |
3 | Dichroic film - 3M CM 500 |
4 | 0.025″ DUREFLEX A4700 TPU (tie layer) |
5 | 0.060″ PETG - sandstone-matte finish |
TABLE 2 | |
Layer # | Description |
1 | 0.500″ PETG embossed |
2 | 0.025″ DUREPLEX A4700 TPU (tie layer) |
3 | Dichroic film - CM 500 |
4 | 0.025″ DUREFLEX A4700 TPU (tie layer) |
5 | 0.500″ PETG - sandstone finish |
TABLE 3 | |
Layer # | Description |
1 | ⅛″ PETG - sandstone-matte finish |
2 | 0.025″ DUREFLEX A4700 TPU (tie layer) |
3 | Dichroic film - CM 500 or CM 592 |
4 | 0.025″ DUREFLEX A4700 TPU (tie layer) |
5 | ⅛″ PETG - sandstone-matte finish |
TABLE 4 | |
Layer # | Description |
1 | ⅜″ PETG - pre-embossed “Large Tile” |
2 | 0.025″ DUREFLEX A4700 TPU (tie layer) |
3 | 1.15 mils Dichroic film 3M CM 500 |
4 | 0.025″ DUREFLEX A4700 TPU (tie layer) |
5 | ⅛″ PETG - textured sandstone paper finish |
Claims (38)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/029,177 USRE45978E1 (en) | 2007-02-26 | 2008-02-25 | Formable fused polymer panels containing light refracting films |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US89171707P | 2007-02-26 | 2007-02-26 | |
PCT/US2008/054854 WO2008106389A1 (en) | 2007-02-26 | 2008-02-25 | Formable fused polymer panels containing light refracting films |
US12/064,936 US7940459B2 (en) | 2007-02-26 | 2008-02-25 | Formable fused polymer panels containing light refracting films |
US14/029,177 USRE45978E1 (en) | 2007-02-26 | 2008-02-25 | Formable fused polymer panels containing light refracting films |
Publications (1)
Publication Number | Publication Date |
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USRE45978E1 true USRE45978E1 (en) | 2016-04-19 |
Family
ID=39721575
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US12/064,936 Active US7940459B2 (en) | 2007-02-26 | 2008-02-25 | Formable fused polymer panels containing light refracting films |
US14/029,177 Expired - Fee Related USRE45978E1 (en) | 2007-02-26 | 2008-02-25 | Formable fused polymer panels containing light refracting films |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US12/064,936 Active US7940459B2 (en) | 2007-02-26 | 2008-02-25 | Formable fused polymer panels containing light refracting films |
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US (2) | US7940459B2 (en) |
CN (1) | CN101657751B (en) |
WO (1) | WO2008106389A1 (en) |
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USD1040529S1 (en) * | 2020-10-07 | 2024-09-03 | The Glad Products Company | Film |
USD1041178S1 (en) * | 2020-10-07 | 2024-09-10 | The Glad Products Company | Film |
CN113848598B (en) * | 2021-09-29 | 2023-03-24 | 青岛歌尔声学科技有限公司 | Film pasting method and lens assembly |
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Also Published As
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CN101657751B (en) | 2012-11-14 |
CN101657751A (en) | 2010-02-24 |
US7940459B2 (en) | 2011-05-10 |
WO2008106389A1 (en) | 2008-09-04 |
US20100265581A1 (en) | 2010-10-21 |
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