WO2018055502A1 - Procédé de fourniture de produits photoluminescents - Google Patents

Procédé de fourniture de produits photoluminescents Download PDF

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Publication number
WO2018055502A1
WO2018055502A1 PCT/IB2017/055629 IB2017055629W WO2018055502A1 WO 2018055502 A1 WO2018055502 A1 WO 2018055502A1 IB 2017055629 W IB2017055629 W IB 2017055629W WO 2018055502 A1 WO2018055502 A1 WO 2018055502A1
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WO
WIPO (PCT)
Prior art keywords
layer
photoluminescent
face
applying
clear
Prior art date
Application number
PCT/IB2017/055629
Other languages
English (en)
Inventor
Giordano Aggio
Gionata Bianchin
Original Assignee
Mira Glass S.R.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mira Glass S.R.L. filed Critical Mira Glass S.R.L.
Publication of WO2018055502A1 publication Critical patent/WO2018055502A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10018—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising only one glass sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10247—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons
    • B32B17/10256—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons created by printing techniques
    • B32B17/10284—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons created by printing techniques on intermediate layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10651—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer comprising colorants, e.g. dyes or pigments
    • B32B17/10669—Luminescent agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10788—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing ethylene vinylacetate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12—Chemical modification
    • C08J7/14—Chemical modification with acids, their salts or anhydrides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K2/00—Non-electric light sources using luminescence; Light sources using electrochemiluminescence
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2327/00—Polyvinylhalogenides
    • B32B2327/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2427/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes

Definitions

  • the present invention relates to a method for providing photoluminescent products; the invention also relates to photoluminescent products per se, be they obtained by means of the method cited above or not.
  • the possibility to accumulate and then return light can thus be used in various manners, for example to indicate the very presence of the photoluminescent object in the dark and therefore facilitate its location (consider for example the remote control of the TV set, the mobile telephone, key rings, etc.).
  • the pigments can be integrated in signs and boards hung on walls, so as to allow their visibility even in case of power outage or other emergency situations and allow for example the immediate identification of the escape routes and/or of emergency exits.
  • the aim of the present invention is to solve the problems described above, proposing a method that allows to provide effective photoluminescent products capable of ensuring high performance.
  • an object of the invention is to provide effective photoluminescent products capable of ensuring high performance.
  • Another object of the invention is to propose a method that allows to provide photoluminescent products in which the photoluminescence effect has a high intensity and/or lasts a long time.
  • Another object of the invention is to provide a photoluminescent product in which the photoluminescent effect has a high intensity and/or lasts a long time.
  • Another object of the invention is to offer on the market photoluminescent products which lack the many drawbacks that can be observed in known solutions.
  • Another object of the invention is to offer on the market photoluminescent products which ensure high reliability in operation.
  • Another object of the invention is to propose a method that adopts a technical and structural architecture that is alternative with respect to those of the methods of the known type.
  • Another object of the invention is to propose a method that can be performed easily starting from commonly commercially available elements and materials.
  • a still further object of the invention is to propose a product and a method that can be easily industrialized and embodied in a simple manner and with modest costs.
  • Figure 1 is a schematic perspective view of the product according to the invention in a first embodiment
  • Figure 2 is a schematic perspective view of the product according to the invention in a second embodiment
  • Figure 3 is a schematic perspective view of the product according to the invention in a third embodiment
  • Figure 4 is a schematic perspective view of the product according to the invention in a fourth embodiment.
  • the reference numeral 1 generally designates a photoluminescent product, which is the subject matter of the present description together with a method that allows to provide photoluminescent products 1.
  • photoluminescent product 1 can find application in any sector in which photoluminescent products are already commonly used, and likewise the product 1 is intended to be assigned also to new sectors, in particular in all fields in which, until now, the limitations of photoluminescent products of the known type, solved as will become apparent by the invention, have prevented their diffusion.
  • the method first of all entails providing, in a step a., a first layer 10 which comprises clear polyester; said first layer 10 is treated, at at least one first face thereof, with trichloroacetic acid.
  • trichloroacetic acid is sometimes referenced by the acronym "TCA”, which will therefore be used several times also in the continuation of the present description for the sake of simplicity.
  • the first layer 10 comprises glossy and clear polyester.
  • step a. is performed by resorting to an apparatus provided with a spool around which a film of polyester, already treated with TCA, intended to undergo the subsequent processes after its unwinding from said spool, is wound.
  • Step a then provides, in an embodiment of considerable practical interest, which in any case does not limit the embodiment of the invention, for unwinding the film and making it continuously available to the subsequent processing stages, in order to allow the execution of the other provided steps.
  • the method according to the invention provides, in a step b., for applying at least to the first face of the first layer 10 a second layer 20, which comprises a clear bonding agent. Then, in a step c, the method according to the invention provides for applying, on the second layer 20, a third layer 30 (obviously on the opposite side with respect to the first layer 10).
  • the third layer 30 comprises clear polyvinyl chloride (PVC) and a photoluminescent additive.
  • the photoluminescent additive (preferably but not necessarily in powder form) can be chosen of a synthetic type or not, with any particle size and color, and can also be of a known type. Therefore, it is possible to adopt strontium aluminate or zinc sulfide or others as photoluminescent additive comprised in the third layer 30.
  • the photoluminescent additive is a strontium aluminate powder, which has a particle size comprised between 80 microns and 120 microns.
  • first layer 10 acts as backing for the subsequent materials and the use of TCA in this regard is of extreme practical interest.
  • TCA in fact allows stable adhesion of the second layer 20 and of the third layer 30, obviating the incompatibility that polyester normally has.
  • TCA allows to propose a method in which the backing (the first layer 10), on which the second layer 20 and then the subsequent ones are deposited, is maintained inside the final photoluminescent product 1. Therefore, in addition to eliminating the waste of raw material (paper), by virtue of TCA it is possible to give the photoluminescent product 1 the strength of the polyester that is present (at least) in its first layer 10.
  • the polyester comprised in the first layer 10 gives (in addition to the other properties) a pleasant depth effect, by virtue of its thickness (which is chosen large at will) and its transparency.
  • the second layer 20, as mentioned, comprises a bonding agent; this is done to facilitate the coupling between the first layer 10 (the polyester treated with TCA) and the third layer 30, which contains the photoluminescent additive and is therefore responsible for the photoluminescent effect of the product 1 that can be obtained at the end of the method according to the invention.
  • said bonding agent is polyurethane.
  • the method provides, in a step d., for applying on the third layer 30 (and obviously on the opposite side with respect to the second layer 20) a fourth layer 40, which comprises polyvinyl chloride and a white coloring agent.
  • a white coloring agent for example, a white paste or an optical whitening agent (sometimes termed "optical bleach") may be used.
  • said white coloring agent is constituted by titanium oxide.
  • optical whitening agents also known in English as
  • optical brighteners or “optical brightening agents”
  • fluorescence a physical phenomenon of short duration, differently from photoluminescence
  • absorb light in the ultraviolet range and re-emit it in the blue region, typically at 420-470 nm. This allows it to indeed perform a "brightening” function, modifying (towards white) the chromatic perception of the observer.
  • the fourth layer 40 therefore performs a role of absolute interest, since it imparts a powerful rebound to the light radiation, facilitating the unidirectionality of reflected radiation and a considerable increase in the accumulation of said radiation.
  • the intensity of the photoluminescent effect produced by the third layer 30 is thus significantly enhanced and increased by the fourth layer 40.
  • the photoluminescent product 1, obtained by means of the method according to the invention, is therefore composed at least of the first layer 10, the second layer 20, the third layer 30 and the fourth layer 40 (and in this first embodiment is shown schematically in Figure 1).
  • the light is emitted by the third layer 30 (with the coloring agent in the fourth layer 40 enhancing the effect) and, by crossing the second layer 20, is emitted outward by the first layer 10.
  • steps b., c. and d. occur at successive stations of an apparatus provided for this purpose and crossed by the film which, as shown, constitutes the first layer 10.
  • the second layer 20, the third layer 30 and the fourth layer 40 are therefore deposited progressively thereon.
  • the apparatus can be of the type with autonomous modules with multiple stages, like the ones provided for the production of synthetic hides, which manage heat in a differentiated manner for each module, as a function of the material being treated and of its properties and/or requirements, applying (in that case spreading) said material with very high precision.
  • the method according to the invention in any case provides for giving a considerable thickness to the first layer 10 and/or to the second layer 20 and/or to the third layer 30 and/or to the fourth layer 40, ensuring quality and performance levels of extreme interest, far higher than those obtainable with known solutions.
  • the product 1 therefore is provided, preferably but not exclusively, in sheets, spools or multilayer panels, which can be cut and shaped (and packaged) according to the requirements and the specific field of application for which they are intended.
  • the sheet can in fact be easily die-cut, etched, glued and processed in various manners (for example it can be printed by thermal sublimation or with printing of another type, as will become apparent in the pages that follow), indeed as a function of the specific requirements.
  • the method also provides for a step e., which follows step d., of application of a fifth layer 50 on the fourth layer 40, obviously on the opposite side with respect to the third layer 30; the fifth layer 50 comprises an adhesive, preferably of the type of a polyurethane-based heat-activated adhesive.
  • the product 1 obtained by performing step e. as well is therefore shown schematically in Figure 2.
  • the presence of the fifth layer 50 allows the adhesion of additional backings, as a function of the specific application: for example, by virtue of the fifth layer 50 it is possible to make the product 1 adhere to fabrics or clothing (or others).
  • This treatment allows to eliminate any irregularities of the fifth layer 50, rendering it substantially smooth: thus (taking care to remove the coating) the product 1 can be made to adhere by suction effect to backings of various kinds (walls of pieces of furniture, glass panes and windows, car windscreens, etc.) in a stable but (easily) removable manner and without leaving adhesive residues of any kind on said backings.
  • the product 1 can be applied and removed from different backings even a few days later, offering a further appealing method of use to users.
  • One or more of the mentioned steps b., c, d., and e. of application can be performed by means of a method chosen among spreading, doctoring, laying, facing (indeed performed by the corresponding station of the apparatus), and the like.
  • steps b., c, d., and e. of application provide for dispensing the corresponding layer 20, 30, 40, 50 on the layer 10, 20, 30, 40 that lies below the (at least partially) liquid layer, and subjecting it to subsequent drying.
  • the first layer 10 can be subjected to at least one additional treatment, chosen from a thermal stabilization treatment (which provides dimensional stability), a treatment to provide hydrophilicity (to the first layer 10), a treatment to increase mechanical strength (of said first layer 10 and therefore also of the final product 1), and the like.
  • a thermal stabilization treatment which provides dimensional stability
  • a treatment to provide hydrophilicity to the first layer 10
  • a treatment to increase mechanical strength of said first layer 10 and therefore also of the final product 1
  • This additional treatment can be performed at any moment of the method as a function of the specific requirements, without thereby abandoning the protective scope claimed herein, and preferably is performed upstream of step a., since polyester films wound on spools, already treated with TCA (as already shown) and already subjected to the desired additional treatment/treatments) are intended to be provided.
  • step f. which precedes step b., for printing at least one image on the first face, treated with TCA, of the first layer 10.
  • step f. which precedes step b., for printing at least one image on the first face, treated with TCA, of the first layer 10.
  • Step f. can be performed in various manners, which are in any case within the protective scope claimed herein, and for example by sublimation.
  • the method provides, in a step g., for applying on the fourth layer 40 a sixth layer 60 (obviously on the opposite side with respect to the third layer 30) which comprises clear polyvinyl chloride and a photoluminescent additive (for example therefore of the type of the third layer 30).
  • this embodiment provides, in a step h., for applying on the sixth layer 60 (obviously on the opposite side with respect to the fourth layer 40) a seventh layer 70 which comprises a clear bonding agent (for example therefore of the type of the second layer 20).
  • said embodiment provides, in a step i., for applying on the seventh layer 70 (obviously on the opposite side with respect to the sixth layer 60) an eighth layer 80 which comprises, at at least one first face treated with trichloroacetic acid, clear polyester (for example therefore of the type of the first layer 10).
  • the photoluminescent product 1 that can be obtained according to what has been described above (and therefore comprising at least the first layer 10, the second layer 20, the third layer 30, the fourth layer 40, the sixth layer 60, the seventh layer 70 and the eighth layer 80) has a fourth layer 40 which is interposed between two sequences of superimposed laminar elements which are in practice mirror- symmetrical (if one refers to the respective materials that compose them).
  • Such a product 1 is favorably capable of ensuring photoluminescent effects at each of the two outermost surfaces, effects generated by the third layer 30 and by the sixth layer 60 (both of which contain a photoluminescent additive, of the same type or even different) and enhanced by the white coloring agent (be it titanium oxide or others) contained in the (intermediate) fourth layer 40.
  • the method can provide for applying one or more auxiliary external layers which comprise polyester and are treated, at at least one first face, with trichloroacetic acid, in order to increase the strength (and also the resistance) of the photoluminescent product 1 and/or to allow coupling (by virtue of the properties of TCA), with additional laminar elements, be they laminated, pressed, or others.
  • outer layers can be applied to one or both of the outermost surfaces of the product 1 (in any one of the possible embodiments), as a function of the specific requirements.
  • the sixth layer 60, the seventh layer 70, the eighth layer 80 and the additional outer layers also can be applied by spreading, doctoring, laying, facing, and the like, and optionally with a preliminary dispensing in the liquid state and subsequent drying.
  • the method according to the invention also provides for applying at least one external covering made of glass.
  • This choice allows to give greater elegance and pleasantness to the product 1 , allowing the public offering of constructive solutions of higher prestige (as well as of higher strength, indeed provided by the glass).
  • the external glass covering can be provided in any manner, according to the specific requirements, for any one of the possible embodiments of the product 1.
  • the covering comprises a film 90 of polyvinyl butyral (PVB) and/or ethylene vinyl acetate (EVA), on which a glass lamina 100 is applied externally.
  • PVB polyvinyl butyral
  • EVA ethylene vinyl acetate
  • Figure 4 indeed shows a possible embodiment of what has just been described, in which the external covering is applied to the product 1 of the "mirror symmetrical" type, described in the preceding pages and shown in Figure 3.
  • the first layer 10 and the eighth layer 80 both comprise polyester treated with TCA on both faces.
  • the method according to the invention provides, in a post-processing step j., for performing on the outer layer printing (which is covering or not, in order to obtain various light effects).
  • the printing (which can be of the digital type or not) is provided by means of a method chosen among inkjet, thermal sublimation and the like.
  • thermal sublimation printing is certainly identifiable in the fact that it is does not interfere with optimum diffusion of light, which can pass freely through the images provided with this method.
  • the present description also relates to a photoluminescent product 1.
  • the photoluminescent product 1 comprises at least one first layer 10, which in turn comprises clear polyester treated, at at least one first face, with TCA. Furthermore, the product 1 comprises a second layer 20, which is applied to the first face of the first layer 10 and comprises a clear bonding agent (for example polyur ethane). A third layer 30 is then applied on the second layer 20 and comprises clear polyvinyl chloride and a photoluminescent additive. Finally, the product 1 according to the invention comprises a fourth layer 40, which is applied to the third layer 30 and comprises polyvinyl chloride and a white coloring agent (for example titanium oxide, although other options are not excluded, as shown).
  • a white coloring agent for example titanium oxide, although other options are not excluded, as shown.
  • the product 1 according to the invention can therefore first of all be obtained by means of the method according to the invention, and thus comprises all the particularities and the further specifications described in the preceding pages in relation to the numerous constructive variations that have been proposed or in any case can be deduced from the present description.
  • the product 1 can have a valid application in all contexts in which photoluminescence effects (with considerably improved performance with respect to known solutions) turn out to be of interest.
  • An application of assured practical interest provides for manufacturing with the product 1 panels to be hung on the walls of homes (or other buildings).
  • the panels can ensure brightness even in the absence of other light sources and without any energy consumption.
  • the panel allows for example the people who are present to move at night, without having to turn on the lights and therefore without having to disturb the sleep of other people, in a practical manner (and with an evident energy saving).
  • the method and the product 1 according to the invention achieve the intended aim since the large quantity of photoluminescent additive that can be mixed with the PVC in the third layer 30 ensures a photoluminescent effective of considerable intensity and long duration, and this effect is enhanced maximally by resorting (in the fourth layer 40) to a white coloring agent (be it titanium oxide or others).
  • the invention therefore allows to obtain photoluminescent products 1 that are effective and capable of ensuring high performance.
  • the considerable thickness and the numerous variations described give additional properties to the product 1, which is therefore capable of overcoming the many drawbacks that can be observed in known solutions (poor intensity and poor duration of the luminous effect, poor strength, poor outdoor resistance and/or resistance to atmospheric agents, early yellowing, early opacification, poor chemical-mechanical resistance, poor thermal resistance, poor dimensional stability, poor transparency, poor compatibility with other materials, inability to support sublimation treatments, etc.).
  • the invention emits bright light for a long time at zero cost (since it simply returns effectively the light stored previously): this is of even greater practical interest, in view of the increasing attention to clean and renewable energy sources.
  • the first layer 10 can constitute a valid backing (as a replacement of paper or other materials of a known type) also in relation to non-photoluminescent products, ensuring in any case a performance that is higher than known ones.
  • the materials used, as well as the dimensions, may be any according to the requirements and the state of the art.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Led Devices (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Electroluminescent Light Sources (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne un procédé de fourniture de produits photoluminescents (1), comprenant : la fourniture d'une première couche (10) comportant un polyester transparent traité, au niveau d'au moins une première face, avec de l'acide trichloroacétique ; l'application, sur ladite première face de la première couche (10), d'une deuxième couche (20) comportant un agent de liaison transparent ; l'application, sur la deuxième couche (20), d'une troisième couche (30) comportant du polychlorure de vinyle transparent et un additif photoluminescent ; et l'application, sur la troisième couche (30), d'une quatrième couche (40) comportant du polychlorure de vinyle et un agent colorant blanc ; le produit photoluminescent (1) est donc composé d'au moins la première couche (10), la deuxième couche (20), la troisième couche (30) et la quatrième couche (40).
PCT/IB2017/055629 2016-09-20 2017-09-18 Procédé de fourniture de produits photoluminescents WO2018055502A1 (fr)

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IT102016000094050 2016-09-20
IT102016000094050A IT201600094050A1 (it) 2016-09-20 2016-09-20 Procedimento di realizzazione di prodotti fotoluminescenti.

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Citations (8)

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Publication number Priority date Publication date Assignee Title
FR2311991A1 (fr) * 1975-05-23 1976-12-17 Payen De La Garanderie Hugues Pellicules luminescentes transparentes et leurs applications notamment comme sources d'energie lumineuse
EP1270698A2 (fr) * 2001-06-20 2003-01-02 Tesa AG Ruban adhésif double-face permettant de fixer des plaques d'impression
WO2003004928A1 (fr) * 2001-07-06 2003-01-16 Armony Signaletique Procede de fabrication d'un materiau photolumiscent et le materiau obtenu
US20030085384A1 (en) * 1998-10-13 2003-05-08 Peter Burnell-Jones Heat curable thermosetting luminescent resins
US20050142371A1 (en) * 2002-05-31 2005-06-30 Swain Stuart D. Phosphorescent sheets or films having protective topcoat and methods of making the same
WO2011012275A1 (fr) * 2009-07-27 2011-02-03 Coveme S.P.A. Couches protectrices appropriées pour une application en tant que feuilles arrière pour modules photovoltaïques
US20120080613A1 (en) * 2010-09-30 2012-04-05 Performance Indicator, Llc. Photolytically and Environmentally Stable Multilayer Structure for High Efficiency Electromagnetic Energy Conversion and Sustained Secondary Emission
DE102012022464A1 (de) * 2012-11-15 2014-05-15 SÜDDEKOR GmbH Abriebfestes Oberflächenmaterial

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FR2311991A1 (fr) * 1975-05-23 1976-12-17 Payen De La Garanderie Hugues Pellicules luminescentes transparentes et leurs applications notamment comme sources d'energie lumineuse
US20030085384A1 (en) * 1998-10-13 2003-05-08 Peter Burnell-Jones Heat curable thermosetting luminescent resins
EP1270698A2 (fr) * 2001-06-20 2003-01-02 Tesa AG Ruban adhésif double-face permettant de fixer des plaques d'impression
WO2003004928A1 (fr) * 2001-07-06 2003-01-16 Armony Signaletique Procede de fabrication d'un materiau photolumiscent et le materiau obtenu
US20050142371A1 (en) * 2002-05-31 2005-06-30 Swain Stuart D. Phosphorescent sheets or films having protective topcoat and methods of making the same
WO2011012275A1 (fr) * 2009-07-27 2011-02-03 Coveme S.P.A. Couches protectrices appropriées pour une application en tant que feuilles arrière pour modules photovoltaïques
US20120080613A1 (en) * 2010-09-30 2012-04-05 Performance Indicator, Llc. Photolytically and Environmentally Stable Multilayer Structure for High Efficiency Electromagnetic Energy Conversion and Sustained Secondary Emission
DE102012022464A1 (de) * 2012-11-15 2014-05-15 SÜDDEKOR GmbH Abriebfestes Oberflächenmaterial

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DARIA CASCIANI: "Urban darkness (4): materials glow in the nocturnal cityscape", 27 February 2012 (2012-02-27), XP055378207, Retrieved from the Internet <URL:https://dariacasciani.net/2012/02/27/urban-darkness-materials-glow-in-the-nocturnal-cityscape/> [retrieved on 20170602] *

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