WO2008075853A2 - Method of manufacture for photoluminescent porcelain enamel signboard - Google Patents

Method of manufacture for photoluminescent porcelain enamel signboard Download PDF

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Publication number
WO2008075853A2
WO2008075853A2 PCT/KR2007/006494 KR2007006494W WO2008075853A2 WO 2008075853 A2 WO2008075853 A2 WO 2008075853A2 KR 2007006494 W KR2007006494 W KR 2007006494W WO 2008075853 A2 WO2008075853 A2 WO 2008075853A2
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WO
WIPO (PCT)
Prior art keywords
photoluminescent
porcelain enamel
enamel
coating
layer
Prior art date
Application number
PCT/KR2007/006494
Other languages
French (fr)
Inventor
Duck Shin Lee
Original Assignee
Ds Enterprise, Inc.
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 Ds Enterprise, Inc. filed Critical Ds Enterprise, Inc.
Publication of WO2008075853A2 publication Critical patent/WO2008075853A2/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/22—Luminous paints
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/06—Coating on selected surface areas, e.g. using masks
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
    • C23C18/1204—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
    • C23C18/1208—Oxides, e.g. ceramics
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
    • C23C18/1225—Deposition of multilayers of inorganic material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
    • C23C18/125—Process of deposition of the inorganic material
    • C23C18/1295—Process of deposition of the inorganic material with after-treatment of the deposited inorganic material

Definitions

  • the present invention relates to the manufacturing method of the photoluminescent signboard.
  • the invention is a improved version of the previous Utility Model Patent No. 0319954 registered by the current applicant, which relates to the manufacturing method of photoluminescent signboard where the base surface is formed using porcelain enamel and pattern layer is formed using non-photoluminescent porcelain enamel.
  • Porcelain enamel possesses excellent durability, heat-resistance, and fire-resistance as it is manufactured by applying glaze membrane on iron or metal plates. While porcelain enamel is generally being used to fabricate cooking utensils and laboratory equipments due to its attractive and clean appearance, their strong resistance against UV-ray, coupled with the aforementioned advantages makes it a material suitable for manufacturing general signboard as well. However, there exists the problem of preparing separate lighting facility in nocturnal or dark environments. Warning signboard and various other instruction plates have another disadvantage.
  • a photoluminescent porcelain enamel instruction plate formed by mixing transparent enamel and photoluminescent pigment to create photoluminescent enamel, applying patterns on the surface of the plate processed with porcelain enamel using the created photoluminescent enamel, and finally calcining inside the kiln.
  • a photoluminescent porcelain enamel instruction plate formed by applying a coat of photoluminescent enamel on the surface of the plate processed with porcelain enamel, applying patterns using non-photoluminescent enamel, and finally calcining inside the kiln.
  • Figure 1 is a cross-section drawing illustrating the photoluminescent signboard manufactured in accordance with the present invention
  • the composition of the photoluminescent signboard manufactured in accordance with the present invention is as follows.
  • Figure 2 is a sequential diagram illustrating the 'manufacturing method 1' of the photoluminescent porcelain enamel signboard, developed in accordance with the present invention
  • the manufacturing method of enamel signboard with photoluminescent base surface and non-photoluminescent instruction messages comprises of:
  • PreferredO A preprocessing of the surface of the plate selected among steel plate, stainless plate, aluminum plate, and alloy plate based on the application of the signboard and its location of installation, in order to assure fine coating and calcination of porcelain enamel.
  • P120 A prime porcelain enamel layer coating process, consisting of calcining inside the kiln under appropriate temperature once the surface of the plate has been completely dried after having treated evenly with prime porcelain enamel coat, selected based on the type, thickness and the application of the plate.
  • P140 A drying process, consisting of formation of photoluminescent porcelain enamel layer by applying photoluminescent enamel, a mixture of 100 transparent enamel and 20-70 photoluminescent pigment, evenly on top of the secondary porcelain enamel coating.
  • the calcining temperature mentioned from the above manufacture method varies in accordance with the type of the plate (10). It is appropriate to process the metal plate at 800-920 0 C and aluminum plate at 520-560 0 C for 4 to 6 minutes. Deviating from the above temperature and time range may fail the plate to maintain a stable appearance and may also cause unsatisfactory adhesion between the enamel and the plate. Plate shall be utilized only after having its surface preprocessed with sulfuric acid. Numerous pin holes will appear during this process, which will strengthen the adhesiveness between the enamel and the plate. However, this process may be exempt for plates that had their surfaces preprocessed as suitable for use with porcelain enamel.
  • a porcelain enamel that contains adhesive substance such as cobalt oxide shall be used to assist in adhesion with the plate. It is appropriate to form the prime porcelain enamel coat in thickness of 80 ⁇ 120 ⁇ m as cracks may occur on the enamel layer due to unsatisfactory adhesion with the plate when the enamel layer is excessively thick or thin.
  • a porcelain enamel coat that contains titan oxide whitener shall be used to eliminate the visibility of the prime layer. It is appropriate to form the secondary porcelain enamel coat in thickness of 80 ⁇ 120um as the prime layer may become transparent and cracks may occur on the enamel layer when the enamel layer is excessively thick or thin.
  • the transparent enamel that shall be mixed into the photoluminescent enamel shall be selected among the enamels that possess excellent light projection and low melting point such as 45-55 weight % SiO 2 , 15-20 weight % Na 2 O, 10-20 weight % B 2 O 3 , 1-5 weight% K 2 O 5 2-5 weight % TiO 2 , 3-5 weight % ZnO, 2-6 weight % Li 2 O, 2-6 weight % ZrO 2 , and 5-10 weight % Al 2 O 3 , in order to assure effective manufacture process.
  • the enamels that possess excellent light projection and low melting point such as 45-55 weight % SiO 2 , 15-20 weight % Na 2 O, 10-20 weight % B 2 O 3 , 1-5 weight% K 2 O 5 2-5 weight % TiO 2 , 3-5 weight % ZnO, 2-6 weight % Li 2 O, 2-6 weight % ZrO 2 , and 5-10 weight % Al 2 O 3 , in order to assure effective manufacture process.
  • the photoluminescent pigment it is appropriate to use a chemical compound that is not harmful to human body, possesses excellent brightness, durability, and heat resistance such as (SrO)(MgO)o.iAl 2 ⁇ 3(EuO,Dy2 ⁇ 3)o.oiBo, A 2 O 3 SrO 3 B 2 O 3 ⁇ tC.
  • a chemical compound that is not harmful to human body possesses excellent brightness, durability, and heat resistance
  • a mixture of 100 weight % transparent porcelain enamel and 20-70 weight % photoluminescent pigment shall be used to manufacture photoluminescent enamel, while its thickness shall range between 80-120 ⁇ m for general application.
  • the porcelain enamel decalcomania paper shall contain an opaque pigment to create contrast between non— photoluminescent pattern layer and photoluminescent porcelain enamel layer.
  • the thickness of the non photoluminescent pattern layer shall range between 80— 120 ⁇ m.
  • Photoluminescent porcelain enamel signboard 1 had been manufactured in accordance with the following procedure. First, a prime porcelain enamel layer had been fabricated by first applying prime porcelain enamel coat on the surface of the metal plate which had been preprocessed to achieve satisfying adhesion, then calcining inside the kiln for 5 minutes under the temperature of 830— 920 0 C once the layer has completely dried. Next, a secondary porcelain enamel layer had been fabricated by applying secondary porcelain enamel with thickness of 80— 120 ⁇ m and calcining inside the kiln for 5 minutes under the temperature of 800-830 0 C once the layer has completely dried.
  • a photoluminescent porcelain enamel layer had been fabricated by applying a photoluminescent enamel created from the mixture of transparent enamel and photoluminescent pigment which had been prepared with the weight ratio of 7:3 once the layer has completely dried.
  • a non— photoluminescent pattern layer had been fabricated by attaching porcelain enamel decalcomania paper with desired patterns and calcining inside the kiln for 5 minutes under the temperature of 750-830 0 C.
  • Photoluminescent porcelain enamel signboard 2 had been manufactured in accordance with the following procedure. First, a prime porcelain enamel layer had been fabricated by first applying prime porcelain enamel coat on the surface of the stainless steel plate which had been preprocessed to achieve satisfying adhesion, then calcining inside the kiln for 5 minutes under the temperature of 880-920°C once the layer has completely dried Next, a secondary porcelain enamel layer had been fabricated by applying secondary porcelain enamel and calcining inside the kiln for 5 minutes under the temperature of 800-830°C once the layer has completely dried.
  • a photoluminescent porcelain enamel layer had been fabricated by applying a photoluminescent enamel created from the mixture of transparent enamel and photoluminescent pigment which had been prepared with the weight ratio of 7:3 once the layer has completely dried.
  • a non-photoluminescent pattern layer had been fabricated by attaching porcelain enamel decalcomania paper with desired patterns and calcining inside the kiln for 5 minutes under the temperature of 750-830 0 C.
  • Figure 3 is a sequential diagram which illustrates the manufacture method no. 2 for manufacturing a photoluminescent porcelain enamel signboard, in accordance with the present invention.
  • manufacture method No. 2 has effectively simplified the calcining process involved in manufacturing the photoluminescent enamel layer (40) and non-photoluminescent pattern layer (50).
  • description of the above-mentioned processes such as (PIlO), (P120), (P130), (P140), and (P160) will be excluded as they had already been explained in Figure 2 and would apply identically for Figure 3.
  • Photoluminescent porcelain enamel signboard had been manufactured in accordance with the following procedure.
  • a prime porcelain enamel layer had been fabricated by first applying prime porcelain enamel coat on the surface of the metal plate which had been preprocessed to achieve satisfying adhesion, then calcining inside the kiln for 5 minutes under the temperature of 830-920°C once the layer has completely dried.
  • a secondary porcelain enamel layer had been fabricated by applying secondary porcelain enamel and calcining inside the kiln for 5 minutes under the temperature of 800-830°C once the layer has completely dried.
  • a photoluminescent porcelain enamel layer had been fabricated by applying a photoluminescent enamel created from the mixture of transparent enamel and photoluminescent pigment prepared with the weight ratio of 7:3 once the layer has completely dried.
  • a non-photoluminescent pattern layer had been fabricated by attaching porcelain enamel decalcomania paper with desired patterns and calcining inside the kiln for 5 minutes under the temperature of 750-830 0 C.
  • a photoluminescent porcelain enamel signboard developed in accordance with the procedures described from either practical application 1 or 3 has a tendency to make the signboard more distinct as non-photoluminescent patterns are effectively blended onto the surface of the photoluminescent base layer.
  • the present invention provides concrete and systematic manufacturing method for the fabrication of photoluminescent porcelain enamel signboard, which consists of non-photoluminescent patterns attached on the surface of a photoluminescent base surface.
  • the manufacturing method No. 2 has the advantage of reducing the number of required processes.
  • a photoluminescent porcelain enamel signboard manufactured based on the present invention shows explicit advantage of non-photoluminescent patterns being effectively blended onto the surface of the photoluminescent base layer. This makes the signboard practically useful as fire-fighting equipment, safety instruction plate, and warning plate used to prevent safety accidents.

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Description

Method of Manufacture for Photoluminescent Porcelain Enamel Signboard
DESCRIPTION
PUKPOSE OF THE INVENTION
The technology affiliated with the invention and the existing technology in the field
The present invention relates to the manufacturing method of the photoluminescent signboard. In specific, the invention is a improved version of the previous Utility Model Patent No. 0319954 registered by the current applicant, which relates to the manufacturing method of photoluminescent signboard where the base surface is formed using porcelain enamel and pattern layer is formed using non-photoluminescent porcelain enamel.
Porcelain enamel possesses excellent durability, heat-resistance, and fire-resistance as it is manufactured by applying glaze membrane on iron or metal plates. While porcelain enamel is generally being used to fabricate cooking utensils and laboratory equipments due to its attractive and clean appearance, their strong resistance against UV-ray, coupled with the aforementioned advantages makes it a material suitable for manufacturing general signboard as well. However, there exists the problem of preparing separate lighting facility in nocturnal or dark environments. Warning signboard and various other instruction plates have another disadvantage. Although, they shall be made to be clearly visible even in dark environment by applying non-photoluminescent patterns on a surface that possesses photoluminescent property in order to serve as effective fire-proof structure, to provide safety instructions, and to prevent safety accidents, they have the disadvantage of not being able to be utilized as general instruction plates despite of all the advantages mentioned above. Photoluminescence is especially essential in the field of fire-fighting system as its instruction facilities must continue to operate even under the situation when the power supply has been cut off. In an attempt to resolve the above problems, the applicant had already applied for a Utility Model Patent No. 0319954 in the past. The content of the above utility model pertained to the invention of the following photoluminescent porcelain enamel instruction plates. A photoluminescent porcelain enamel instruction plate formed by mixing transparent enamel and photoluminescent pigment to create photoluminescent enamel, applying patterns on the surface of the plate processed with porcelain enamel using the created photoluminescent enamel, and finally calcining inside the kiln. A photoluminescent porcelain enamel instruction plate formed by applying a coat of photoluminescent enamel on the surface of the plate processed with porcelain enamel, applying patterns using non-photoluminescent enamel, and finally calcining inside the kiln. The above utility models however, possessed the limitation of unsystematic and indefinite manufacture method.
Technical objective of the invention
In due consideration of the above matters, it is the applicant objective to provide more systematic and concrete manufacture method for the fabrication of photoluminescent signboard with non-photoluminescent patterns on photoluminescent base surface, by improving the previously applied Utility Model Patent No. 0319954.
COMPOSITION OF THE INVENTION
The present invention shall be explained by referring to the figure displayed below. Reviewer shall note mat the reference numbers indicated for the processes in the attached figure are also used to indicate identical processes in other figures if at all possible. Furthermore, repeated descriptions have been omitted, while any detailed descriptions about specific process have been omitted if they were determined to make the essential points of the invention obscure.
Figure 1 is a cross-section drawing illustrating the photoluminescent signboard manufactured in accordance with the present invention
According to Figure I5 the composition of the photoluminescent signboard manufactured in accordance with the present invention is as follows. A plate (10) selected among steel plate, stainless plate, aluminum plate, and alloy plate; a prime porcelain enamel layer (20) formed by calcining inside the kiln under appropriate temperature once the surface of the plate (10) has been completely dried after having treated evenly with prime porcelain enamel coat, selected based on the type, thickness and the application of the plate (10) a secondary porcelain enamel layer (30) formed by calcining inside the kiln under appropriate temperature once the surface of the prime porcelain enamel layer (20) has been completely dried after having treated evenly with secondary porcelain enamel coat, selected based on the type, thickness and the application of the plate a photoluminescent porcelain enamel layer (40), formed by calcining inside the kiln once the surface of the secondary porcelain enamel layer (30) has been completely dried after having treated with photoluminescent enamel, formed by mixing transparent enamel and photoluminescent pigment in small proportion; and a non-photoluminescent pattern layer (50) formed by calcining inside the kiln after having indicated desired text, numbers, symbols, and images on the surface of the photoluminescent porcelain enamel layer (40) using enamel decalcomania paper.
Figure 2 is a sequential diagram illustrating the 'manufacturing method 1' of the photoluminescent porcelain enamel signboard, developed in accordance with the present invention
According to Figure 2, the manufacturing method of enamel signboard with photoluminescent base surface and non-photoluminescent instruction messages comprises of:
(PIlO) A preprocessing of the surface of the plate selected among steel plate, stainless plate, aluminum plate, and alloy plate based on the application of the signboard and its location of installation, in order to assure fine coating and calcination of porcelain enamel.
(P120) A prime porcelain enamel layer coating process, consisting of calcining inside the kiln under appropriate temperature once the surface of the plate has been completely dried after having treated evenly with prime porcelain enamel coat, selected based on the type, thickness and the application of the plate.
(P130) A secondary porcelain enamel layer coating process, consisting of calcining inside the kiln under appropriate temperature once the surface of the prime porcelain enamel layer has been completely dried after having treated evenly with secondary porcelain enamel coat, selected based on the type, thickness and the application of the plate.
(P140) A drying process, consisting of formation of photoluminescent porcelain enamel layer by applying photoluminescent enamel, a mixture of 100 transparent enamel and 20-70 photoluminescent pigment, evenly on top of the secondary porcelain enamel coating.
(P 150) A process of calcining the above photoluminescent porcelain enamel layer coated with photoluminescent enamel inside the kiln.
(P 160) A process of forming a non-photoluminescent pattern layer by indicating desired texts, numbers, symbols, tables, and images using porcelain enamel decalcomania paper on of the surface of the above calcinated photoluminescent porcelain enamel layer.
(P 170) A process of calcining the non-photoluminescent pattern layer inside the kiln.
The calcining temperature mentioned from the above manufacture method varies in accordance with the type of the plate (10). It is appropriate to process the metal plate at 800-9200C and aluminum plate at 520-5600C for 4 to 6 minutes. Deviating from the above temperature and time range may fail the plate to maintain a stable appearance and may also cause unsatisfactory adhesion between the enamel and the plate. Plate shall be utilized only after having its surface preprocessed with sulfuric acid. Numerous pin holes will appear during this process, which will strengthen the adhesiveness between the enamel and the plate. However, this process may be exempt for plates that had their surfaces preprocessed as suitable for use with porcelain enamel.
For the prime enamel coat, a porcelain enamel that contains adhesive substance such as cobalt oxide shall be used to assist in adhesion with the plate. It is appropriate to form the prime porcelain enamel coat in thickness of 80~120μm as cracks may occur on the enamel layer due to unsatisfactory adhesion with the plate when the enamel layer is excessively thick or thin. As for the secondary enamel coat, a porcelain enamel coat that contains titan oxide whitener shall be used to eliminate the visibility of the prime layer. It is appropriate to form the secondary porcelain enamel coat in thickness of 80~120um as the prime layer may become transparent and cracks may occur on the enamel layer when the enamel layer is excessively thick or thin.
In the present invention, the transparent enamel that shall be mixed into the photoluminescent enamel shall be selected among the enamels that possess excellent light projection and low melting point such as 45-55 weight % SiO2, 15-20 weight % Na2O, 10-20 weight % B2O3, 1-5 weight% K2O5 2-5 weight % TiO2, 3-5 weight % ZnO, 2-6 weight % Li2O, 2-6 weight % ZrO2, and 5-10 weight % Al2O3, in order to assure effective manufacture process. As for the photoluminescent pigment, it is appropriate to use a chemical compound that is not harmful to human body, possesses excellent brightness, durability, and heat resistance such as (SrO)(MgO)o.iAl2θ3(EuO,Dy2θ3)o.oiBo, A2O3SrO3B2O3^tC. As for the photoluminescent, lack of photoluminescent pigment results in unsatisfactory photoluminescence while excess of photoluminescent pigment results in increase of cost. In order to resolve the above issues associated with the lack of photoluminescence effect and cost, a mixture of 100 weight % transparent porcelain enamel and 20-70 weight % photoluminescent pigment shall be used to manufacture photoluminescent enamel, while its thickness shall range between 80-120μm for general application.
The porcelain enamel decalcomania paper shall contain an opaque pigment to create contrast between non— photoluminescent pattern layer and photoluminescent porcelain enamel layer. The thickness of the non photoluminescent pattern layer shall range between 80— 120μm. [Practical Application 1]
Photoluminescent porcelain enamel signboard 1 had been manufactured in accordance with the following procedure. First, a prime porcelain enamel layer had been fabricated by first applying prime porcelain enamel coat on the surface of the metal plate which had been preprocessed to achieve satisfying adhesion, then calcining inside the kiln for 5 minutes under the temperature of 830— 9200C once the layer has completely dried. Next, a secondary porcelain enamel layer had been fabricated by applying secondary porcelain enamel with thickness of 80— 120μm and calcining inside the kiln for 5 minutes under the temperature of 800-8300C once the layer has completely dried. Then, a photoluminescent porcelain enamel layer had been fabricated by applying a photoluminescent enamel created from the mixture of transparent enamel and photoluminescent pigment which had been prepared with the weight ratio of 7:3 once the layer has completely dried. Finally, a non— photoluminescent pattern layer had been fabricated by attaching porcelain enamel decalcomania paper with desired patterns and calcining inside the kiln for 5 minutes under the temperature of 750-8300C.
[Practical Application 2]
Photoluminescent porcelain enamel signboard 2 had been manufactured in accordance with the following procedure. First, a prime porcelain enamel layer had been fabricated by first applying prime porcelain enamel coat on the surface of the stainless steel plate which had been preprocessed to achieve satisfying adhesion, then calcining inside the kiln for 5 minutes under the temperature of 880-920°C once the layer has completely dried Next, a secondary porcelain enamel layer had been fabricated by applying secondary porcelain enamel and calcining inside the kiln for 5 minutes under the temperature of 800-830°C once the layer has completely dried. Then, a photoluminescent porcelain enamel layer had been fabricated by applying a photoluminescent enamel created from the mixture of transparent enamel and photoluminescent pigment which had been prepared with the weight ratio of 7:3 once the layer has completely dried. Finally, a non-photoluminescent pattern layer had been fabricated by attaching porcelain enamel decalcomania paper with desired patterns and calcining inside the kiln for 5 minutes under the temperature of 750-8300C.
Figure 3 is a sequential diagram which illustrates the manufacture method no. 2 for manufacturing a photoluminescent porcelain enamel signboard, in accordance with the present invention.
According to Figure 3, manufacture method No. 2 has effectively simplified the calcining process involved in manufacturing the photoluminescent enamel layer (40) and non-photoluminescent pattern layer (50). On the other hand, description of the above-mentioned processes such as (PIlO), (P120), (P130), (P140), and (P160) will be excluded as they had already been explained in Figure 2 and would apply identically for Figure 3.
In manufacturing a photoluminescent porcelain enamel signboard with photoluminescent base and non-photoluminescent instruction message in accordance with the manufacturing method No. 2, the above-mentioned processes, (PIlO), (P120), (P130), (P140), and (P160) shall be executed in sequence. In addition, a unified calcining process (P 180) shall be used instead of two separate processes; calcining process (P 150) for photoluminescent porcelain enamel layer (40) and calcining process (P170) for non-photoluminescent pattern layer (50).
[Practical Application 3]
Photoluminescent porcelain enamel signboard had been manufactured in accordance with the following procedure. First, a prime porcelain enamel layer had been fabricated by first applying prime porcelain enamel coat on the surface of the metal plate which had been preprocessed to achieve satisfying adhesion, then calcining inside the kiln for 5 minutes under the temperature of 830-920°C once the layer has completely dried. Next, a secondary porcelain enamel layer had been fabricated by applying secondary porcelain enamel and calcining inside the kiln for 5 minutes under the temperature of 800-830°C once the layer has completely dried. Then, a photoluminescent porcelain enamel layer had been fabricated by applying a photoluminescent enamel created from the mixture of transparent enamel and photoluminescent pigment prepared with the weight ratio of 7:3 once the layer has completely dried. Finally, a non-photoluminescent pattern layer had been fabricated by attaching porcelain enamel decalcomania paper with desired patterns and calcining inside the kiln for 5 minutes under the temperature of 750-8300C.
A photoluminescent porcelain enamel signboard, developed in accordance with the procedures described from either practical application 1 or 3 has a tendency to make the signboard more distinct as non-photoluminescent patterns are effectively blended onto the surface of the photoluminescent base layer.
EFFECT OF THE INVENTION
As mentioned above, the present invention provides concrete and systematic manufacturing method for the fabrication of photoluminescent porcelain enamel signboard, which consists of non-photoluminescent patterns attached on the surface of a photoluminescent base surface. Especially, the manufacturing method No. 2 has the advantage of reducing the number of required processes.
In addition, a photoluminescent porcelain enamel signboard manufactured based on the present invention shows explicit advantage of non-photoluminescent patterns being effectively blended onto the surface of the photoluminescent base layer. This makes the signboard practically useful as fire-fighting equipment, safety instruction plate, and warning plate used to prevent safety accidents.

Claims

CLAIM 1.
Manufacture method of enamel signboard with photoluminescent base surface and non-photoluminescent instruction messages, comprising:
(PIlO) A preprocessing of the surface of the plate material, in order to assure fine coating and calcination of porcelain enamel.
(P 120) A coating process, which involves 5 minutes of calcination inside the kiln after having applied the prime porcelain enamel coating evenly on top of the preprocessed plate surface with the thickness ranging between 80~120μm,
(P 130) A coating process, which involves 5 minutes of calcination inside the kiln after having applied the secondary porcelain enamel coating evenly on top of the prime porcelain enamel coating with the thickness ranging between 80~120μm.
(P 140) A drying process, which involves formation of photoluminescent porcelain enamel layer by applying photoluminescent enamel, a mixture of 100 weight transparent enamel and 20-70 weight photoluminescent pigment, evenly on top of the secondary porcelain enamel coating.
(P 150) A process of calcining the above photoluminescent porcelain enamel layer coated with photoluminescent enamel inside the kiln for 5 minutes.
(P160) A process of forming a non-photoluminescent pattern layer by attaching desired pattern using porcelain enamel decalcomania paper on the surface of the above calcinated photoluminescent porcelain enamel layer.
(P 170) A process of manufacturing photoluminescent signboard through processes involving calcination of the above non-photoluminescent pattern layers inside the kiln for 5 minutes. OAlM 2.
Manufacturing method of enamel signboard with photoluminescent base surface and non-photolurninescent instruction messages, comprising:
(PIlO) A preprocessing of the surface of the plate material, in order to assure fine coating and calcining of porcelain enamel.
(P 120) A coating process, which involves 5 minutes of calcination inside the kiln after having applied the prime porcelain enamel coating evenly on top of the preprocessed plate surface with the thickness ranging between 80~120μm,
(P130) A coating process, which involves 5 minutes of calcination inside the kiln after having applied the secondary porcelain enamel coating evenly on top of the prime porcelain enamel coating with the thickness ranging between 80~120um.
(P 140) A drying process, which involves formation of photoluminescent porcelain enamel layer by applying photoluminescent enamel, a mixture of 100 weight transparent enamel and 20~70 weight photoluminescent pigment, evenly on top of the secondary porcelain enamel coating.
(P 160) A process of forming a non-photoluminescent pattern layer by attaching desired pattern using porcelain enamel decalcomania paper on of the surface of the above calcinated photoluminescent porcelain enamel layer.
(Pl 80) A process of manufacturing photoluminescent signboard through processes involving calcination of the dried photoluminescent porcelain enamel layers and non-photoluminescent pattern layers inside the kiln for 5 minutes.
PCT/KR2007/006494 2006-12-18 2007-12-13 Method of manufacture for photoluminescent porcelain enamel signboard WO2008075853A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2006-0129135 2006-12-18
KR1020060129135A KR100752144B1 (en) 2006-12-18 2006-12-18 Method of manufacture for photoluminscent porcelain enamel signboard

Publications (1)

Publication Number Publication Date
WO2008075853A2 true WO2008075853A2 (en) 2008-06-26

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WO (1) WO2008075853A2 (en)

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KR101286043B1 (en) 2012-02-16 2013-07-19 디에스엔터프라이즈(주) Memorial plate and commemorative plate coated with porcelain enamel having excellent durability and manufacturing method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200146367Y1 (en) * 1996-08-12 1999-06-15 박명수 Guide signboard
JP3482407B2 (en) * 2001-12-28 2003-12-22 修 筒井 Display member having luminous function
KR20040079260A (en) * 2003-03-07 2004-09-14 최종근 Guide Indicator With A Storage Light Property
KR200319954Y1 (en) * 2003-04-12 2003-07-12 디에스엔터프라이즈(주) Photoluminescent Porcelain Enamel for Instruction Plate and Signage
KR20060062806A (en) * 2004-12-06 2006-06-12 권필주 Method for making guide-sign apparatus
KR20060122398A (en) * 2005-05-27 2006-11-30 주식회사 오빌테크 Guide indicating plate using luminescent materials and method for manuafacturing therof

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