Lacquer-like coating and decoration for glass bottle

Abstract

To provide a glass bottle simple in pre-treatment and subjected to lacquer-like coating and decoration by using a simple coating and drying device.SOLUTION: A surface of a glass bottle is wiped with a cloth containing a thinner. A holder of the glass bottle is a magnet detachable type and has an air hole communicating with a T-shape. A mouth of the glass bottle is inserted and fitted onto a silicone rubber plug. A magnet portion is joined to and mounted on a magnetic body at a central part of a taper guide portion by means of a magnetic force. A two-liquid type polyurethane coating material is spray-coated while the glass bottle is suspended and rotated. The coated glass bottle is suspended from a magnetic body rotary hanger of a drying carriage in a magnet detachable manner. The glass bottle is placed in an electric heating dryer at 60°C and dried for 1 hour. A body portion of the glass bottle is makie-decorated with a coating of the two-liquid polyurethane coating material by screen printing, and the glass bottle is naturally dried to obtain a lacquer-like coated and decorated glass bottle.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a glass bottle painted and decorated with a lacquer finish and a method for producing the same. [Background technology]

[0002] Kishu lacquerware has been produced in Kuroe, Kainan City, Wakayama Prefecture, since the Muromachi period. Its origins date back to Omi craftsmen who moved to Kuroe and began crafting shibuji bowls (bowls with a base made from persimmon tannins mixed with charcoal powder) using Kishu's abundant wood. It is also called Kuroe-nuri after the area's name. Another source of Kishu lacquerware is the creation of temple utensils, such as trays, bowls, and trays, by the monks of Negoro-ji Temple. It is considered one of Japan's three great lacquerware styles, along with Aizu-nuri (Fukushima Prefecture), Yamanaka-nuri, and Wajima-nuri (Ishikawa Prefecture). Kishu lacquerware primarily uses persimmon tannins and glue as the base coat, rather than lacquer, and is then finished with a lacquer coating. These were used as practical vessels by commoners. It has since developed through the introduction of decorative techniques such as maki-e (lacquer lacquering) and chinkin-bori (gold-in-gold carving). Lacquerware has been around for a long time, but in recent years there has been an increase in synthetic lacquerware products. Synthetic lacquerware is lacquerware that uses plastic instead of wood as the raw material. Synthetic paints such as urethane and cashew paint are also becoming more common in lacquerware (Non-Patent Document 1).

[0003] When painting glass products, sandblasting or treatment with a silane coupling agent is usually used. Glassware surfaces are sandblasted to form a finely textured surface and processed into opaque ground glass, or the surface is roughened by hydrogen fluoride treatment to process it into opaque ground glass. Then, on the processed glassware, a desired pattern is hand-painted using a paint made by mixing 100 parts of vermilion lacquer or acrylic resin paint with 1 to 5 parts of a silane coupling agent, using a brush or other paint brush, or the desired pattern is transferred and formed by screen printing using a silk screen stencil (Patent Document 1). This method involves applying lacquer to the glassware. The glass products are subjected to sandblasting or hydrogen fluoride treatment as a pre-treatment, and a silane coupling agent is mixed into the paint to improve the adhesion of the paint to the glass products.

[0004] A bottle coating holder has been invented in which a turntable is attached around a hanging can as its axis, a downward-facing trumpet-shaped hard plastic fitting body is attached concentrically to its underside, a step is formed on its inner surface, several notches are made, and a bottle mouth fitting convex part is provided on the top surface (Patent Document 2). The bottle neck is brought to the downward-facing trumpet-shaped hard plastic fitting, the neck is inserted into the convex neck fitting on the top surface, and the bottle is held in place while painting. This takes time to install, and because the neck is sealed, there is a risk that it may come off if the inside of the bottle expands during painting.

[0005] Furthermore, Figure 1 of Patent Document 3 shows an electrostatic powder coating device using a spray gun having an electric motor (1), a bottle rotation device (2), an L-shaped shaft (3), a bottle cap (4), a bottle holder (5), a rod (6), a spring (7), a bottle (8), a center holder (23), and a spring (24) (Patent Document 3). In this case, the bottle cap holds the neck of the bottle with a spring, the tip of the bottle holder fits into the mouth of the bottle and holds it there, and the bottom of the bottle is supported by a center presser with a spring, and the bottle is rotated by a bottle rotation device while electrostatic powder coating is applied with a spray gun. In this case too, it takes time to attach, and because the bottle mouth is sealed, there is a risk that it may come off if the inside of the bottle expands during coating.

[0006] In a drying device for drying a thermosetting coating film painted or printed on the surface of a glass container, a drying device for coating or printing on glass containers has been invented, which has a horizontally elongated polygonal or cylindrical drying oven body with a roughly polygonal or cylindrical reflective dome along the longitudinal direction, far-infrared lamps arranged along the longitudinal direction within this reflective dome, and a conveyor that supports the glass container to be dried within the irradiation range of the far-infrared lamps and moves it along the longitudinal direction of the drying oven body (Patent Document 4). This device supports and processes glass containers one by one, but requires a large installation area and is a drying device for mass production.

[0007] A high-strength metallic decoration method for glass containers has been invented, in which thermosetting resin ink is printed on the surface of a glass container to form a thermosetting resin layer of the desired design, the thermosetting resin ink is heated to semi-cure the thermosetting resin layer, a foil with a protective coating that is pre-layered and hardened by ultraviolet light is transferred onto the surface of the semi-cure thermosetting resin layer, the protective coating is hardened by irradiating it with ultraviolet light, the thermosetting resin layer is fully hardened in a drying oven, and then the foil is cooled (Patent Document 5). The process of applying foil to a semi-cured thermosetting resin layer is complicated, and UV curing requires a lamp device. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 10-194782 [Patent Document 2] Public Disclosure No. 49-9848 [Patent Document 3] Public Disclosure of Practical Use No. 52-25155 [Patent Document 4] Japanese Patent Application Laid-Open No. 2006-176730 [Patent Document 5] Japanese Patent Application Publication No. 11-020299 [Non-patent literature]

[0009] [Non-Patent Document 1] Kishu Lacquerware Cooperative Association Homepage Summary of the Invention [Problem to be solved by the invention]

[0010] When painting glass products, sandblasting or treatment with a silane coupling agent is usually performed. Patent Document 1 invents a glass product that is decorated with lacquer, in which the surface of the glassware is sandblasted to form a finely textured surface and processed into opaque frosted glass, or the surface of the glassware is roughened by hydrogen fluoride treatment to process into opaque frosted glass, and then the desired pattern is hand-drawn on the processed glassware using a paint made by mixing 1 to 5 parts of a silane coupling agent with 100 parts of vermilion lacquer or acrylic resin paint with a brush or paint brush, or the desired pattern is transferred and formed by screen printing using a silk screen stencil. Glass products are pretreated by sandblasting or hydrogen fluoride treatment, and a silane coupling agent is mixed into the paint to improve the adhesion of the paint to the glass product. Such pretreatment is cumbersome, and a simpler pretreatment is desired. Patent document 2 invents a bottle coating holder in which a turntable is attached around a hanging can as an axis, a downward-facing trumpet-shaped hard plastic fitting body is attached concentrically to the underside of the turntable, a step is formed on the inner surface of the turntable, several notches are made, and a bottle mouth fitting protrusion is provided on the ceiling surface. The bottle neck is brought to a downward-facing trumpet-shaped hard plastic fitting, the neck is inserted into the convex neck fitting on the top surface, and the bottle is held in place while painting is being carried out. This process takes time to remove and attach, and because the neck is sealed, there is a risk that it may come off if the inside of the bottle expands during painting. Furthermore, Figure 1 of Patent Document 3 shows an electrostatic powder coating device using a spray gun, which includes an electric motor (1), a bottle rotation device (2), an L-shaped shaft (3), a bottle cap (4), a bottle holder (5), a rod (6), a spring (7), a bottle (8), a center press (23), and a spring (24). In this case, the bottle neck is held by the bottle cap and spring, the tip of the bottle holder fits into and holds the bottle mouth, and the bottle bottom is supported by the spring-loaded center press. The bottle is rotated by the bottle rotation device while electrostatically powder coating is performed with the spray gun. This also takes time to install, and since the bottle mouth is sealed, there is a risk of it coming loose if the inside of the bottle expands during coating. Patent Document 4 describes a drying device for drying a thermosetting coating that has been painted or printed on the surface of a glass container, in which an approximately polygonal or cylindrical reflective dome is provided along the longitudinal direction within a horizontally elongated polygonal or cylindrical drying oven body, far-infrared lamps are arranged along the longitudinal direction within this reflective dome, and a conveyor is arranged to support the glass container to be dried within the irradiation range of the far-infrared lamps and move the glass container along the longitudinal direction of the drying oven body. Glass containers are supported and processed one by one, but a large installation area is required, making this a drying device for mass production. Patent Document 5 invents a method for applying high-strength metallic decoration to glass containers, in which a thermosetting resin ink is printed on the surface of a glass container to form a thermosetting resin layer of a desired design, the thermosetting resin ink is heated to semi-cure the thermosetting resin layer, a foil with a protective film that is pre-layered and hardened by ultraviolet light is transferred to the surface of the semi-cure thermosetting resin layer, the protective film is hardened by irradiating it with ultraviolet light, the thermosetting resin layer is fully hardened in a drying oven, and then cooled. The process of applying foil to a semi-cured thermosetting resin layer is complicated, and UV curing requires a lamp device.

[0011] The present invention was made to solve the problems that have existed in the past. Specifically, there is a need for a method and device that can apply a coating with good adhesion without requiring a complicated pre-treatment process for glass bottles, and can simply spray paint a glass bottle while hanging it on a holder and rotating it, then dry it in a simple drying device and use lacquer art techniques such as maki-e to decorate it in a lacquerware-like style. [Means for solving the problem]

[0012] The painting and decorating of glass bottles consists of a pre-treatment process, a painting process, a drying process, and a decorating process. In the pre-treatment process, the surface of the glass bottle is wiped with a cloth soaked in thinner or alcohol. The glass bottle holder is made up of a swivel shaft, a tapered guide, a magnet, a joint rod, a cap holder, and a silicone rubber plug. There is a T-shaped air hole that runs from the center of the cap holder through the center of the upper joint rod to the side of the joint rod. The mouth of the glass bottle is inserted into the silicone rubber plug and fitted, and the magnet part is attached to a non-magnetic tapered guide. This is a coating device for lacquer-like painting and decorative painting of glass bottles, which uses a magnetic detachable glass bottle holder that is attached to the magnetic material in the center of the guide part by magnetic force, and spray-paints a two-component polyurethane paint made of a polyol compound and an isocyanate compound while hanging and rotating the glass bottle, and by tilting the joint rod part, the magnet part can be easily detached from the tapered guide part, and with the lower part of the magnet part still attached, it is attached to the magnetic rotary hanger of the drying cart by the magnetic force of the magnet part and hangs the painted glass bottle. Pretreatment is simply a matter of wiping the surface of the glass bottle with a cloth soaked in thinner or alcohol to degrease it. The rotating shaft and taper guide are on the mount side, and the magnet, joint rod, cap holder, and silicone rubber plug are handling jigs. The non-magnetic taper guide below the rotating shaft has a trumpet-shaped bottom and a magnetic body in the center, and while a strong force is required to pull the magnetic part straight down to remove it, it can be easily removed by tilting the joint rod with the magnet to the side. In addition, since the taper guide has a trumpet-shaped bottom, it can be easily attached to the magnetic body in the center using magnetic force. There is a T-shaped air hole that runs from the center of the cap holder through the center of the upper joint rod to the side of the joint rod, preventing the air inside the glass bottle from expanding during spray painting and drying, causing the silicone rubber plug to come off. The silicone rubber plug fits into the mouth of the glass bottle using elasticity and friction. It can be removed and replaced between the taper guide and magnet. The silicone rubber plug is exposed to heat when the painted glass bottle dries, so it is a consumable item that must be removed from the cap holder and replaced.

[0013] The painting and decorating of glass bottles involves a pre-treatment process, a painting process, a drying process, and a decorating process. The roughly cubic cart used in the drying process is made up of four long vertical frames, several horizontal frames, two partitions that separate the top and bottom into three compartments, rotary hangers attached to the top of each of the three compartments, a balance weight on the lower floor, and vibration-damping casters installed at the bottom of the four long vertical frames. The painted glass bottles are attached to the magnetic rotary hangers of the drying cart with the magnetic force of the magnets still attached, and the painted glass bottles are then hung and placed in an electric dryer at 60°C to dry for one hour. This is a drying device for lacquer-like painting and decorating of glass bottles that uses a detachable magnet drying cart. The joint rod with a magnet is tilted and removed from the magnetic part in the center of the non-magnetic tapered guide below the rotating shaft of the paint booth, and the joint rod is attached to the magnetic rotary hanger of the drying cart using the magnetic force of the magnet part, and the painted glass bottles are hung from it, and this cart is then placed in the dryer. The rotary hanger is rotatable and shaped like a fatsia leaf, and the painted glass bottles are hung from the protruding part via the magnetic part to dry. The top and four sides of the cart can be fitted with polycarbonate plates or the like. The electric dryer used was made by National. The dryer does not use hot air, but only heat, to prevent dirt from getting on the painted surface.

[0014] The coating and decorating of glass bottles, which consists of a pretreatment process, a coating process, a drying process, and a decorating process, involves either masking the body of the glass bottle with a conical plug or not, hanging the glass bottle from a holder, and while rotating the glass bottle, spray-coating it with a two-component polyurethane paint made of a polyol compound and an isocyanate compound, attaching the painted glass bottle to a magnetic rotary hanger on a drying cart and hanging it, and drying it for one hour in an electric dryer at 60°C. After that, if the masking process was performed, the masking conical plug is removed, or if the masking process was not performed, the bottle is left as is, and then screen-printed with a maki-e decoration using the two-component polyurethane paint, followed by air-drying to produce a lacquer-finished and decorated glass bottle.

[0015] The screen printing machine used was a device manufactured by Shin-ei Kogyo Co., Ltd. The paint was placed on the screen, the squeegee was lowered onto the screen, and the screen was automatically moved to the right at a constant speed. The glass bottle was placed on its side, with the body in contact with the screen, and as the screen moved to the right, the glass bottle rotated to the right and screen printing was performed on the body of the glass bottle. The spray gun painting was done using a two-component polyurethane paint made from a polyol compound and an isocyanate compound. The paint was applied to a glass bottle with a spray gun, and after drying, the paint adhesion was tested using a cross-cut test (checkerboard tape) (JISK5600 General Paint Test Method 4-6) and the results were categorized into six categories: Category 0 (no peeling at any of the grids) and Category 1 (small peeling of the paint film at the intersections of the cuts, not clearly exceeding 5%) (analysis by Wakayama Prefectural Industrial Technology Center).

[0016] For spray gun application, Saito Co., Ltd.'s Epicoater UE Wide (two-component polyurethane paint) was used. This is a two-component polyurethane paint consisting of an alkyd polyol compound (component A) and an isocyanate compound (component B, hardener). The mixing ratio (by weight) of components A and B is 2:1, and the thinner dilution rate (relative to component A) is 50-60%. Component A is 50-55% alkyd polyol, and approximately 40% solvent, such as xylene. The coating was applied to a glass plate with a 76μ applicator, dried at room temperature (18-20°C), and measured 24 hours later. The hardness was measured using a sword rocker value of 40, and the scratch hardness (pencil method, JIS K5600-5-4) was 3H. Weather resistance test: painted onto ABS (acrylic butadiene styrene copolymer) resin and exposed outdoors for one year with no abnormalities. Boiling water resistance test: painted onto a melamine resin bowl and dried at room temperature for one week before being boiled for 30 minutes with no abnormalities (Saito Co., Ltd. test). Passed the Food Sanitation Law (Containers and Packaging) test (Ministry of Health and Welfare Notification No. 20). Elution test: Heavy metals 1μg / ml or less, potassium permanganate consumption 1.5μg / ml or less, coloring agent water elution not present, 4% acetic acid elution not present, material test: Cadmium 2μg / g or less, lead 20μg / g or less (analysis by Chiba Pharmaceutical Association Inspection Center).

[0017] For the masking process, a masking cone plug (manufactured by Iwata Seisakusho Co., Ltd., product number GKH1772) was used. The cone plug is made of silicone rubber, and its hollow structure allows it to flexibly fit and adhere to the surface of the glass bottle. After the masking process, the paint was applied with a spray gun, and after drying, the masked areas were screen-printed with maki-e. In this case, the areas without maki-e can be seen through depending on the light.

[0018] Maki-e is a decorative technique for lacquerware. It involves painting a base picture with slow-drying paint, and then finishing the picture by sprinkling pigments such as metallic powder and colored powder on top before the paint has completely dried. The following techniques are named after the techniques of Kasane and maki-e on glass bottles. Two-layer (lacquer and maki-e): This is a technique in which the entire glass bottle is painted black or vermilion with a spray gun, and then maki-e is applied directly to the glass bottle without using an intervening film. Die-cut maki-e: This is a technique in which maki-e is applied after marking film (film with adhesive) is cut into the desired shape. Paste (maki-e only): This is a technique in which maki-e is applied to a pre-formed marking film (film with adhesive, available in black and gold). The technique of painting glass bottles has been named Irogiri (color mist). Whereas lacquerware is painted entirely with black or vermilion, Irogiri is characterized by the use of gradations of gold and other colors, like a mist. The techniques are as follows: Nuri-paste (bottle coloring and maki-e label): After black paint is applied with a spray gun, gold paint made from a mixture of silver powder and yellow paint is sprayed on top to decorate. This Irogiri is then cut (die-cut maki-e) or pasted (maki-e only). Nuri-bin (bottle coloring): Black or vermilion is sprayed all over the bottle, creating a gradation of gold and other colors, like a mist. Nori-maki (maki-e on bottle): Maki-e is applied directly to the bottle without using a film or other intermediate layer. The color mist is painted with a spray gun, and after it dries, the maki-e is screen-printed onto the glass bottle.

[0019] When printing the maki-e pattern using screen printing, a two-component polyurethane paint manufactured by Cashew Corporation was used. The hardener for Art Shin Maki-e manufactured by Cashew Corporation is 64.81% resin (isocyanate compound) and 26.30% solvent such as xylene. After printing, the material was allowed to dry naturally. [Effects of the Invention]

[0020] Without the need for complex pretreatment processes such as sandblasting the glass bottle surface or treating it with silane coupling agents, a coating with good adhesion can be applied simply by wiping and degreasing with thinner or the like. The glass bottle can be easily hung from a detachable magnetic holder and spray-painted while rotating, and then placed in an electric heating dryer at 60°C while still hanging from the detachable magnetic holder on a magnetic rotary hanger on a dolly for one hour. After drying, the bottle can be decorated with a lacquerware-like finish using lacquer art techniques such as maki-e (Japanese lacquer art) with screen printing to create a luxurious glass bottle. The coating and drying process can be performed with the detachable magnetic holder still attached to the glass bottle, making it simple and time-saving. [Brief explanation of the drawings]

[0021] [Figure 1] A schematic front view of a detachable magnetic holder for glass bottles when spray painting, and a schematic front view showing how to detach the magnet part [Figure 2] A schematic perspective view of a magnetic detachable drying cart for painted glass bottles [Figure 3] Schematic diagram of the screen printing device [Figure 4] Front view of painted and decorated glass bottle DETAILED DESCRIPTION OF THE INVENTION

[0022] Examples of the present invention are shown below, but the present invention is not limited to these examples. [Example]

[0023] The painting and decorating of glass bottles (7) consists of a pre-treatment process, a painting process, a drying process, and a decorating process. In the pre-treatment process, the surface of the glass bottle (7) is wiped with a cloth soaked in thinner or alcohol. The holder for the glass bottle (7) consists of a swivel shaft (1), a tapered guide (2), a magnet (3), a joint rod (4), a cap holder (5), and a silicone rubber plug (6). There is a T-shaped air hole that runs from the center of the cap holder (5) through the center of the upper joint rod (4) to the side of the joint rod (4). The mouth of the glass bottle (7) is inserted into the silicone rubber plug (6) and fitted. The magnet part (3) is then demagnetized. The glass bottle (7) is spray-painted with a two-component polyurethane paint made of a polyol compound and an isocyanate compound while the glass bottle (7) is hung and rotated by magnetically joining it to the magnetic material in the center of the tapered guide part (2) of the drying cart, and the magnet part (3) can be easily detached from the tapered guide part (2) by tilting the joint rod (4). The magnet part (3) is attached to a rotary hanger (9) of a magnetic material on a drying cart by the magnetic force of the magnet part (3) and the painted glass bottle (7) is hung from the rotary hanger (9). This is a coating device for lacquering and decorative painting of glass bottles (7) using a magnetic detachable glass bottle holder.

[0024] Pretreatment is simply a matter of wiping the surface of the glass bottle with a cloth soaked in thinner or alcohol to degrease it. The pivot shaft (1) and taper guide (2) are located on the base side, and the magnet (3), joint rod (4), cap holder (5), and silicone rubber plug (6) are handling jigs. The non-magnetic taper guide (2) below the pivot shaft (1) is horn-shaped at the bottom and has a magnetic body in the center. While a strong force is required to remove the magnet part (3) by pulling it straight down, it can be easily removed by tilting the joint rod (4) with the magnet (3) attached to the side. Furthermore, the taper guide (2) is easy to install because it is horn-shaped at the bottom.

[0025] There is a T-shaped air hole that runs from the center of the cap holder (5) through the center of the upper joint rod (4) to the side of the joint rod (4), so the air inside the glass bottle expands during spray painting and drying, preventing the silicone rubber plug (6) from coming off. The silicone rubber plug (6) fits into the mouth of the glass bottle due to its elasticity and friction. It can be removed and replaced between the taper guide (2) and the magnet (3). The silicone rubber plug (6) is exposed to heat when the painted glass bottle (7) dries, so it is a consumable item that must be removed from the cap holder (5) and replaced. [Example]

[0026] In the painting and decorating of glass bottles (7), which consists of a pre-treatment process, a painting process, a drying process, and a decorating process, a roughly cubic cart used in the drying process is made up of four vertically long frames (11) and several horizontal frames (11), two partition plates (10) that separate the top and bottom into three compartments, rotary hangers (9) attached to the top of each of the three compartments, a balance weight (12) on the lower floor, and vibration-damping casters (13) installed at the bottom of the four vertically long frames (11).The painted glass bottles (7) are attached to the magnetic rotary hangers (9) of the drying cart with the magnetic force of the magnet part (3) still attached, and the painted glass bottles (7) are hung and placed in an electric dryer at 60°C to dry for one hour.This is a drying device for lacquer-like painting and decorating of glass bottles (7) that uses a magnet-detachable drying cart.

[0027] The joint rod (4) with the magnet part (3) is tilted and removed from the magnetic part in the center of the non-magnetic tapered guide (2) below the rotating shaft (1) of the paint booth, and the joint rod (4) is held and attached to the magnetic rotary hanger (9) of the drying cart using the magnetic force of the magnet part (3), and the painted glass bottle (7) is hung from it, and this cart is then placed in the dryer. The rotary hanger (9) can rotate and is shaped like a fatsia leaf, and the painted glass bottle (7) is hung from its protruding part via the magnet part (3) to dry. The top and four sides of the cart may be fitted with polycarbonate plates or the like. The electric dryer used was made by National. The dryer does not use hot air, but only heat, to prevent dirt from getting on the painted surface. [Example]

[0028] The painting and decorating of glass bottles (7) consists of a pre-treatment process, a painting process, a drying process, and a decorating process. The body of the glass bottle (7) is either masked with a conical plug or not, and the glass bottle (7) is hung from a holder and rotated while being spray-painted with a two-component polyurethane paint made of a polyol compound and an isocyanate compound. The painted glass bottle (7) is then attached to a magnetic rotary hanger (9) on a drying cart, hung, and dried in an electric dryer at 60°C for one hour. After that, if masking was performed, the masking is removed, or if not, the bottle is left as is, and then a lacquer-like painted and decorated glass bottle (16) is painted with a two-component polyurethane paint using screen printing and dried naturally. The screen printing machine used was a device manufactured by Shin-ei Kogyo Co., Ltd. Paint was placed on the screen (15), and the squeegee (14) was lowered onto the screen (15), which then automatically moved the screen (15) to the right at a constant speed. The glass bottle (7) was placed on its side, with the body in contact with the screen (15). As the screen (15) moved to the right, the glass bottle (7) rotated to the right, and screen printing was performed on the body of the glass bottle (7). The spray gun painting was done using a two-component polyurethane paint made from a polyol compound and an isocyanate compound. The paint was applied to a glass bottle (7) with a spray gun, and after drying, the paint adhesion was tested using a cross-cut test (checkerboard tape) (JISK5600 General Paint Test Method 4-6). The results were categorized into six categories: Category 0 (no peeling at any of the grids) and Category 1 (small peeling of the paint film at the intersections of the cuts, not exceeding 5%) (analysis by Wakayama Prefectural Industrial Technology Center). For the spray gun application, Epicoater UE Wide (two-component polyurethane paint) manufactured by Saito Co., Ltd. was used. This two-component polyurethane paint is made of an alkyd polyol compound (component A) and an isocyanate compound (component B, hardener), with a mixing ratio (weight ratio) of component A to component B of 2:1, and a thinner dilution rate of 50-60% (relative to component A). The coating was applied to a glass plate with a 76μ applicator, dried at room temperature (18-20°C), and measured 24 hours later. The hardness was measured using a sword rocker value of 40, and the scratch hardness (pencil method, JIS K5600-5-4) was 3H. Weather resistance testing: The coating was applied to ABS (acrylic butadiene styrene copolymer) resin and exposed outdoors for one year without any abnormalities. Boiling water resistance testing: The coating was applied to a melamine resin bowl and dried at room temperature for one week before being boiled for 30 minutes without any abnormalities (Saito Co., Ltd. test). Food Sanitation Act (Containers and Packaging) Test (Ministry of Health and Welfare Notification No. 20), elution test: heavy metals 1μg / ml or less, potassium permanganate consumption 1.5μg / ml or less, coloring agent water elution: no elution, 4% acetic acid elution: no elution, material test: cadmium 2μg / g or less, lead 20μg / g or less (analysis by Chiba Pharmaceutical Association Inspection Center). For the masking process, a masking cone plug (manufactured by Iwata Seisakusho Co., Ltd., product number GKH1772) was used. The cone plug is made of silicone rubber, and its hollow structure allows it to flexibly fit and adhere to the surface of the glass bottle. After the masking process, the paint was applied with a spray gun, and after drying, the masked areas were screen-printed with maki-e. In this case, the areas without maki-e can be seen through depending on the light. Generally, glass bottles are transparent or translucent for the purpose of inspection. Translucent glass bottles include black bottles (which are actually dark green in color), and if a transparent resin mixed with a dye is applied to these bottles, they will appear black at first glance, but will be transparent when light is shone on them. [Example]

[0029] The following techniques are named after the techniques of Kasane and maki-e on glass bottles. Two-layer (lacquer and maki-e): This is a technique in which the entire glass bottle is painted black or vermilion with a spray gun, and then maki-e is applied directly to the glass bottle without using an intervening film. Die-cut maki-e: This is a technique in which maki-e is applied after marking film (film with adhesive) is cut into the desired shape. Paste (maki-e only): This is a technique in which maki-e is applied to a pre-formed marking film (film with adhesive, available in black and gold). These are painted with a spray gun, dried, and then screen-printed with maki-e. [Example]

[0030] The technique of painting glass bottles has been named Irogiri (color mist). Whereas lacquerware is painted entirely with black or vermilion, Irogiri is characterized by the use of gradations of gold and other colors, like a mist. The techniques are as follows: Nuri-paste (bottle coloring and maki-e label): After black paint is applied with a spray gun, gold paint made from a mixture of silver powder and yellow paint is sprayed on top to decorate. This Irogiri is then cut (die-cut maki-e) or pasted (maki-e only). Nuri-bin (bottle coloring): Black or vermilion is sprayed all over the bottle, creating a gradation of gold and other colors, like a mist. Nori-maki (maki-e on bottle): Maki-e is applied directly to the bottle without using a film or other intermediate layer. The color mist is painted with a spray gun, and after it dries, the maki-e is screen-printed onto the glass bottle. These are painted with a spray gun, dried, and then screen-printed with maki-e. [Industrial Applicability]

[0031] Without the need for complex pretreatment processes such as sandblasting the glass bottle surface or treating it with silane coupling agents, a coating with good adhesion can be applied simply by wiping and degreasing with thinner or similar. Glass bottles can be easily hung from a detachable magnetic holder and spray-painted with a two-component polyurethane paint while rotating. The glass bottles can then be placed on a magnetic rotary hanger on a dolly while still hanging from the holder, and placed in an electric heating dryer at 60°C for one hour. After drying, they can be scree-printed with lacquer art techniques such as maki-e to create luxurious glass bottles decorated with a lacquerware look. Painting and drying can be done while the glass bottles are still hanging from the detachable magnetic holder, making the process simple and time-saving. [Explanation of symbols]

[0032] 1 Swivel axis 2 Tapered guide 3. Magnet 4 Joint rod 5 Cap holder 6 Silicone rubber plugs 7. Glass bottle 8 Air vent hole 9 Rotary Hanger 10 Dividers 11 frames 12 balance weights 13 Vibration-damping casters 14 squeegee 15 screens 16 Painted and decorated glass bottles

Claims

1. The painting and decorating of glass bottles consists of a pre-treatment process, a painting process, a drying process, and a decorating process. In the pre-treatment process, the surface of the glass bottle is wiped with a cloth soaked in thinner or alcohol. The glass bottle holder is made up of a swivel shaft, a tapered guide, a magnet, a joint rod, a cap holder, and a silicone rubber plug. There is a T-shaped air hole that runs from the center of the cap holder through the center of the upper joint rod to the side of the joint rod. The mouth of the glass bottle is inserted into the silicone rubber plug and fitted, and the magnet part is attached to a non-magnetic tapered guide. This coating device for lacquer-like painting and decorative painting of glass bottles is characterized by a detachable magnetic glass bottle holder that is attached by magnetic force to a magnetic joint part in the center of the guide part, spray-paints a two-component polyurethane paint made of a polyol compound and an isocyanate compound while hanging and rotating a glass bottle, and can easily detach the magnet part and the tapered guide part by tilting the joint rod, and is attached by the magnetic force of the magnet part to a magnetic rotary hanger of a drying cart with the lower part of the magnet part still attached, and hangs the painted glass bottle.

2. In the painting and decorating of glass bottles, which involves a pre-treatment process, a painting process, a drying process, and a decorating process, the drying process involves a roughly cubic cart used in the drying process, which is made up of four long vertical frames and several horizontal frames, two partition plates dividing the top and bottom into three compartments, a rotary hanger attached to the top of each of the three compartments, a balance weight on the lower floor, and vibration-damping casters installed at the bottom of the four long vertical frames, and the painted glass bottle is attached to the magnetic rotary hanger of the drying cart with the magnetic force of the magnet part still attached, and the painted glass bottle is hung and placed in an electric dryer at 60°C to dry for one hour, characterized in that the drying cart is a magnet-detachable drying cart.

3. 3. The lacquer-finish painted and decorated glass bottle according to claim 1 or 2, which comprises a pretreatment step, a painting step, a drying step, and a decorating step, wherein the body of the glass bottle is either masked with a conical plug or not, and the glass bottle is hung from a holder and rotated while being spray-painted with a two-component polyurethane paint made of a polyol compound and an isocyanate compound, the painted glass bottle is attached to a magnetic rotary hanger of a drying cart and hung, and dried for one hour in an electric dryer at 60°C, after which the masking conical plug is removed if the bottle was masked, or the bottle is left as is if the bottle was not masked, and then decorated with maki-e (lacquerware) using screen printing with the two-component polyurethane paint, and the bottle is then allowed to dry naturally.

Images