JP2011111385A - Glass with identification information and production method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a glass with identification information, which glass exhibits a small time change, is hardly affected by physical environmental conditions, and has identification information capable of being applied before a processing step of the glass or in the early stage of the processing step, and to provide a production method therefor. <P>SOLUTION: In the glass with identification information for identifying the glass, the identification information is installed by adhering a colorant to the glass. The identification information is a color bits code. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a glass with identification information and a method for producing the same, and more particularly to a glass provided with identification information using a colorant that adheres to the glass by heating and a method for producing the same.

  Glass is widely used in automobiles and buildings, and there are various types depending on its use, characteristics, shape, and the like. For example, in automotive glass, depending on the type of car to which the glass is attached and the part to which the glass is attached, the type of glass, bending conditions applied to the glass when manufacturing the glass, tempering treatment conditions, or whether to make laminated glass, When using laminated glass, the type of interlayer film is different. Therefore, it is necessary to attach identification information to each glass and to accurately manage information necessary for manufacturing and selling the glass, such as the type of glass, the object to be attached, the manufacturing conditions, and the delivery destination for each glass.

  In order to attach such identification information to glass, conventionally, a method of marking a barcode on the glass surface using a special ink, a method of printing a color code on glass, or printing a barcode or color code There has been proposed a method (Patent Document 1) for sticking the sealed sticker to glass.

JP 2009-132572 A

  However, since these conventional techniques attach identification information to the glass surface using ink or a seal, the ink or the seal undergoes a change over time, or physical force is applied to the ink or the seal portion from the outside. As a result, the identification information disappears or becomes inaccurate.

  In addition, since cleaning and heat treatment are performed in the glass processing process, if identification information is attached using a conventional method before the processing process or at an early stage of the processing process, identification is already made when the processing of the glass is completed. The information may change or disappear, and there may be a problem that the information cannot be read accurately. Therefore, conventionally, after the glass processing step is completed, a step of attaching identification information is separately provided. However, in this method, since identification information is not attached to the glass during processing, it is not possible to specify which processing step caused the failure when a defective product occurs in the glass. Even when different types of glass are mixed, there is a drawback that it is difficult to distinguish them.

  Glass used in cars and buildings usually has a long service life of several tens of years, so identification information that does not change depending on physical environmental conditions such as friction, light, and temperature is required. As described above, when identification information is attached using ink or a sticker, it is difficult to provide identification information that does not change over a long period of time.

  In order to solve the above problems, the present invention has little change over time, is not easily affected by physical environmental conditions, and has identification information with identification information that can be attached before or at an early stage of the glass processing process. It aims at providing a glass with attachment and its manufacturing method.

  In order to solve the above problems, the first invention of the present application is characterized in that in the glass with identification information for identifying the glass, the identification information is provided by attaching a colorant to the glass by heating. .

  Further, the first invention of the present application is characterized in that the identification information is provided using a heating process in the processing of the glass.

  It is preferable that the processing step used for attaching the identification information is a glass bending step, a tempering step, or a laminating step. Since heat treatment is performed in any step, identification information can be attached to the glass using this treatment.

  As the colorant in the first invention of the present application, a ceramic pigment, a mixture of an inorganic pigment and glass powder, a colored glass powder, an organic pigment such as a resin pigment, or the like can be used.

  In the first invention of the present application, the identification information is preferably a code system using a color arrangement of a plurality of colors, for example, a color bit code. FIG. 1 shows a glass plate 1 having a color bit code 2 attached to the end face 1b as identification information. The color bit code is an information recognition code that uses an array and combination of colors and decodes information based on the difference between adjacent colors, so it only needs to be able to recognize the color, and it can be decoded even if the shape is distorted or bent. is there.

  In 1st invention of this application, it is preferable that identification information is provided in the edge part (edge edge, end surface) of glass.

  The second invention of the present application is characterized in that, in the method for attaching identification information to glass, a colorant is attached to the glass and heated to firmly fix the identification information to the glass.

  The heating in this case is preferably performed using a heating process in glass processing, and the heating process of the bending process, the strengthening process, or the laminating process can be suitably used as the heating process. it can.

  According to the present invention, it is possible to provide a glass having identification information that hardly changes over time and is hardly affected by physical environmental conditions. In addition, since the identification information hardly changes, it is possible to attach the identification information to the glass before the glass processing step or at an early stage of the processing step, and it is possible to detect the mixing of different types of glass at an early stage. Further, when a defective product is produced during processing, the cause can be easily identified.

  Furthermore, according to the present invention, since it is possible to attach identification information to the glass using the heat treatment process in the glass processing process, there is no need to provide a separate process for attaching identification information, and the number of processes as a whole Can be reduced.

  Furthermore, in the first invention of the present application, an organic pigment such as a ceramic pigment, a mixture of an inorganic pigment and glass powder, a colored glass powder, or a resin pigment is used as a colorant which is a material for identification information, and heating Thus, the identification information can be satisfactorily adhered to the glass.

  Further, according to the present invention, a code system using a plurality of colors such as a color bit code is used as the identification information. By using the color bit code, it is possible to attach identification information to a narrow region such as an end face of glass. Since the color bit code decodes information based on the difference between adjacent colors, the influence of shape, fading, and light can be eliminated to the maximum.

  Furthermore, the glass is often placed on a pallet or the like as shown in FIG. 2 until it is finally incorporated into a product, or a plurality of glass sheets are often placed one on top of the other when it is placed on its side. According to the present invention, the identification information (2a and 2b) can be provided on the end portion (particularly the end face) of the glass, and the identification information can be easily confirmed and managed.

FIG. 1 is a view showing a plate glass having a color bit code as identification information on an end face. FIG. 2 is a view showing a state in which plate glasses having color bit codes as identification information on the end faces are arranged on a pallet. FIG. 3 is a flowchart showing an example of a general processing step for plate glass. FIG. 4 is a flowchart showing a process of attaching a color bit code to the end face of the glass sheet using the bending process among the processing processes shown in FIG. FIG. 5 is a flowchart showing a process of attaching a color bit code to the end face of the glass sheet using the alignment process among the processing processes shown in FIG.

Next, embodiments of the present invention will be described. In the first invention of the present application, in the glass with identification information for identifying the glass, the colorant is attached to the glass by heating to provide the identification information. Here, a ceramic pigment, a mixture of an inorganic pigment and glass powder, or colored glass powder can be suitably used as the colorant. As the glass powder, powder or glass beads obtained by crushing transparent glass can be used. As the colored glass powder, powder obtained by crushing previously colored glass or colored glass beads can be used. By using the glass powder, the adhesiveness is improved by heating with the glass to which the identification information is attached. Examples of the inorganic pigment include cobalt oxide (CoO), copper oxide (CuO), chromium oxide (Cr ₂ O ₃ ), nickel oxide (NiO), iron oxide (Fe ₂ O ₃ ), titanium oxide (TiO ₂ ), Manganese oxide (MnO), neodymium oxide (Nd ₂ O ₃ ), erbium oxide (Er ₂ O ₃ ), cerium oxide (CeO ₂ ), or the like can be used. Glass powder (colorless or colored) and glass beads can be made by culleting discarded glass (colorless or colored). The melting point of glass powders targeting these glasses is generally about 500 to 700 ° C., and it is necessary to heat-treat the glass at a temperature equal to or higher than this melting point in order to attach this colorant to the glass by heating. There is.

  As another colorant, an organic pigment that adheres to glass at a lower temperature by heating may be used. As such a colorant, for example, resin pigments such as porcelain 150, porcelain 160, vitrea 160 (manufactured by Peveo Japon Co., Ltd.) can be suitably used. Since these colorants are thermally cured at about 150 ° C., they can be attached to the glass by heat treatment at a relatively low temperature.

  In order to fix such a colorant to the glass by heating, first, the colorant is adhered to a predetermined region of the glass and subjected to heat treatment. The predetermined region is, for example, a glass end surface, but may be provided on the main surface of the glass as long as the use of the glass is not hindered. As a method for attaching the colorant, a method in which a solvent mixed with a colorant is soaked in felt or the like and applied to a predetermined region, or a stamping method in which this is mechanized can be used. Note that a screen printing method or an inkjet method can also be used. In the inkjet method, since a nozzle is used, it is necessary to use a low-viscosity colorant so that the nozzle is not clogged.

  After the colorant is attached to the glass, heat treatment is performed to fix the colorant to the glass. This heat fixing treatment may be carried out independently in the glass processing step, or in the case of a bending step or a tempering step included in the processing step, or in the case of using laminated glass, the heat treatment in the laminating step may be used. May be.

  In the present invention, a color bit code is used as identification information. The identification information using the color bit code can include individual information of the glass such as a production number, a production process, quality, characteristics, and usage. Since the color bit code is a known technique as disclosed in, for example, Japanese Patent Application Laid-Open No. 2009-31835, detailed description is omitted in this specification.

  Next, an example of the manufacturing process of the glass with identification information according to the present invention will be specifically described. This example is an example in which a color bit code is attached as identification information to the glass end face by using the heat treatment in the glass processing step. For ease of understanding, first, refer to the flowchart of FIG. Then, a general processing process of automotive glass will be described.

  As shown in FIG. 3, a plate glass of quality used for automobiles is cut into a predetermined size, washed (steps 300 and 302), the plate glass is heated and subjected to a bending process, and a desired bending is performed. Is formed (step 304). Details of the bending process are well known in the glass industry, and although not described in detail here, for example, a plate glass is placed on a mold having a predetermined shape and heated to, for example, about 500 ° C. to 700 ° C. in a heating furnace. The glass may be bent gradually using its own weight, or the glass heated to 600-800 ° C. may be press-molded with a press mold having a predetermined shape.

  In order to make this glass into bend tempered glass, it is rapidly cooled by using cooling air immediately after being bent by the press molding (step 306).

  Note that, depending on the purpose of use of the glass, there may be a case where an interlayer film is sandwiched between two plate glasses (steps 308 to 312). Lamination is a processing technique that is widely used in the manufacture of windshields, especially in automotive glass, and also in architectural glass for the purpose of enhancing sound insulation and security. For example, a polyvinyl butyral resin is sandwiched between two sheet glasses (step 308), and the sheet glass is pressed and temporarily bonded by applying a predetermined pressure (step 310). In an autoclave of about 150 ° C. and 15 atm. Manufacturing is performed by performing main bonding for 90 minutes by performing heat and pressure treatment (step 312).

  Next, the quality of the glass such as foreign matter contamination and edge condition is inspected to determine whether or not a predetermined standard is satisfied (step 314). If the standard is satisfied, the product is shipped (step 316). If the standard is not satisfied, the product that can be used is re-pressurized by the autoclave (step 312), and the foreign matter mixed or scratched is discarded (step 312). 318) is appropriately performed.

  The general glass processing step has been described above with reference to FIG. 3, but this step is an example, and various modifications can be considered. Further, depending on the purpose of manufacturing the glass (for example, when manufacturing glass other than the windshield of an automobile), the alignment step is not necessary.

  4 and 5 are diagrams for explaining a process of attaching identification information to the glass of the present invention. FIG. 4 shows a color bit using a heating process in the glass bending process (step 304) shown in FIG. FIG. 5 shows a first embodiment in which a code (identification information) is attached to glass. FIG. 5 shows a first embodiment in which a color bit code (identification information) is attached to glass by using a heating process (step 312) in the glass alignment process shown in FIG. Two examples are shown.

  In the first embodiment shown in FIG. 4, first, colorants of three colors, red, yellow, and blue, constituting the color bit code are created (step 400). In this example, the colorant was made by adding inorganic pigments of each color and transparent glass powder as main components and adding an epoxy resin as a fixing agent as required. Instead of adding an inorganic pigment, pre-colored glass powder or colored glass beads may be used, or a ceramic pigment mixed with an organic solvent may be used. In this embodiment, since the color bit code is attached using the heat treatment in the bending process performed at a relatively high temperature, an inorganic pigment having high heat resistance is used. In the second embodiment, As will be described later, when the heat treatment is performed at a relatively low temperature, an organic pigment may be used. The particle size of the glass powder is not limited, but is preferably a micron size in order to attach the color bit code with high accuracy.

  The three colorants thus prepared are subjected to the cleaning process (step 302) in FIG. 3 and then adhered to a predetermined region on the end face of the glass plate using the method described above (steps 402 and 404). The plate glass is bent as described with reference to FIG. 3, and the three colorants are melted on the end surface of the plate glass by utilizing the temperature of the heat treatment (step 406), and then gradually cooled and fixed (step 408). . The melting point of the glass powder which is the main component of the colorant is about 500 to 600 ° C., and the heating temperature in bending is usually about 600 to 700 ° C. Therefore, the colorant is sufficiently melted in this heat treatment step. .

  The color bit code fixed on the glass end surface by heating in this way has high resistance to the physical surrounding environment, and even if the glass is subjected to a cleaning process and a bonding process after bending, it peels off, deforms, or changes its quality. There is nothing. Further, since the change with time is small, the identification information (color bit code) can be used over a long period of time. In this embodiment, the color bit code is attached using the glass bending process (FIG. 3, step 304), but the melting point of the glass powder is also used in the glass strengthening process (FIG. 3, step 306). Since a step of heating to (500 to 600 ° C.) or higher is included, a color bit code can be attached in the strengthening step.

  In the second embodiment shown in FIG. 5, identification information is attached to the end face of the laminated glass. That is, a color bit code (identification information) is attached to the glass end face by using a colorant that melts by low-temperature heating and using a heat treatment in a glass bonding process. As the colorant of this embodiment, for example, a resin-based paint such as porcelain 150, porcelain 160, vitrea 160 (manufactured by Peveo Japon Co., Ltd.) can be suitably used. Specifically, a colorant is attached to the edge portions of the two main glass sheet surfaces between the intermediate film sandwiching step (step 502) and the temporary bonding (step 506) in the alignment step (step 504). ) The colorant is melted by the heat treatment when performing the main adhesion in the autoclave (step 508), slowly cooled (step 510), and fixed. As described with reference to FIG. 3, the main bonding in the alignment step is performed by heating for about 90 minutes in an autoclave at about 150 ° C. and 15 atm. However, this condition is only an example, and depending on the manufacturing purpose, etc. Can be changed.

  In this embodiment, since a colorant that melts by low-temperature heating is used, a color bit code (identification information) can be attached even at a relatively low-temperature heating step in the glass bonding step.

  As mentioned above, although the Example of this invention was described, this invention is not limited to the said Example, A various deformation | transformation and change can be performed. For example, in the above embodiment, the color bit code is attached using the heat treatment in the plate glass processing step, but a heating step for attaching identification information may be provided separately.

  Further, in the above embodiment, the color bit code is attached to the plate glass. However, the object to which the identification information is attached is not limited to the plate glass. For example, a glass bottle, a glass lens, or a glass object such as a glass plate is used. It doesn't have to be a thing. In the above embodiment, a paint containing glass powder or the like is used, but a ceramic pigment mixed in an organic solvent may be attached to the glass edge by screen printing or the like and heated to be fused. In the above embodiment, three color bit codes are attached. However, a code system using a plurality of other color arrangements may be used. Examples of such a code system include a color code provided by Color Zip Japan, “Chameleon Code” (registered trademark) provided by Shift, or “microsoft” provided by Microsoft. tag ". The identification information may be non-standard identification information such as a color bit code, and may be standard identification information such as a character, a number, a figure, a barcode, or a two-dimensional code. Further, when identifying information that is not a color bit code is added, it may be composed of a single color or a plurality of colors.

  The present invention can be used for the glass industry, particularly for glass product management.

Claims (10)

  A glass with identification information for identifying glass, wherein the identification information is provided by attaching a colorant to the glass by heating.   The glass with identification information according to claim 1, wherein the identification information is provided using heating in a processing step of the glass.   The glass with identification information according to claim 2, wherein the processing step is a bending step or a tempering step of the glass.   The glass with identification information according to any one of claims 1 to 3, wherein the colorant is a mixture of an inorganic pigment and glass powder, or colored glass powder.   The glass with identification information according to claim 2, wherein the processing step is a laminating process of the glass.   The glass with identification information according to claim 1, 2, or 4, wherein the colorant is a resin-based paint.   The glass with identification information according to any one of claims 1 to 6, wherein the identification information is a code system using a color arrangement of a plurality of colors.   The glass with identification information according to any one of claims 1 to 7, wherein the identification information is provided at an end portion of the glass.   In the method for attaching identification information to glass, a colorant that adheres to glass by heating is attached to the glass, and this is heated to attach the identification information to the glass.   The method according to claim 9, wherein the heating is performed using a heating step of a bending process, a strengthening process, or a laminating process in the processing of the glass.

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