JPH0997012A - Label blank for product management and method for forming pattern for product management - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to obtain a sufficient contrast between a base material and a recognition pattern by including specific laminar silicate in a sheet-like base material consisting essentially of a inorg. compd., glass frit and org. binder. SOLUTION: This label blank consists of the sheet-like base material consisting essentially of the inorg. compd., glass frit and org. binder. The sheet- like base material further contains the laminar silicate synthesized by heating talc and alkaline metal component. The material which exhibits a distinct contrast from the recognition pattern after firing is preferable as the inorg. compd. Such inorg. compd. includes the powder of metal oxide ceramics, such as SiO2 when, for example, the base material is formed white. The laminar silicate (white pigment) synthesized by heating the talc and the alkaline metal compd. is compounded with the base material, by which the fired body having the sufficient whiteness is obtd. in spite of firing at a low temp. (about <=450 deg.C).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides an inorganic management recognition pattern excellent in heat resistance, chemical resistance, water resistance, durability, etc. as a product or a product (including claims unless otherwise required). , Simply referred to as a product) and a method of forming a recognition means for management of a product using the material.

[0002]

2. Description of the Related Art Conventionally, as control label materials for glass products, metal products, sintered ceramic products, etc., which have excellent heat resistance, chemical resistance, water resistance, durability, etc., inorganic compounds, glass frits, organic binders have been used. There has been proposed an inorganic sheet for forming a baking pattern, which is made into a sheet, and a management pattern is formed on the surface of the sheet when the sheet is used, and then the sheet is baked.
This management label material or inorganic sheet is highly flexible and can be used for on-site label issuance, and its fired body adheres to adherends (glass products, metal products, sintered ceramic products, etc.). Demonstrates excellent heat resistance, chemical resistance, water resistance and durability. For such label material,
There are various problems as described below.

(A) When firing at a low temperature, the decomposition of the organic binder is insufficient and the color tends to be dark, which may hinder the reading of the firing pattern by a bar code reader or the like.

(B) In the production process or product distribution process, in addition to reading the firing pattern, simple identification means such as expressing the type of product by the color or shape of the label itself is required. is there.

(C) The thickness of the pressure-sensitive adhesive to be temporarily fixed to the adherend may have a delicate influence on the adhesive strength, the properties of the sheet after firing, etc., but it is difficult to control this precisely. is there.

(D) Further, as another product management means, there is a method of directly drawing a recognition pattern on an adherend with a laser beam, but in this method, it is generally difficult to obtain a sufficient contrast, and therefore reading is performed. Is not stable,
Since the heat of the laser beam damages the adherend, there is a problem that the quality of the product is greatly impaired. Then, a method of applying a management label material to an adherend and drawing a pattern on the adherend with a laser beam has been studied, but it was found that sufficient contrast cannot be obtained.

[0007]

SUMMARY OF THE INVENTION Accordingly, the main object of the present invention is to provide a new technique which substantially eliminates the problems of the inorganic sheet used as the label material for managing products.

[0008]

SUMMARY OF THE INVENTION The present invention provides the following product management label material and product management pattern forming method in order to substantially eliminate or significantly reduce the above problems of the prior art. It is provided; In a label material for product management comprising a sheet-shaped base material mainly composed of an inorganic compound, glass frit and an organic binder, the sheet-shaped base material is a layered silicate synthesized by further heating talc and an alkali metal compound. Label material for product management characterized by including.

[0009] 2. In a label material for product management in which a recognition pattern layer made of an ink containing another inorganic compound and glass frit is provided on a sheet-shaped base material containing an inorganic compound, a glass frit and an organic binder as a main component, the sheet-shaped base material is A label material for product management, which further comprises a layered silicate synthesized by heating talc and an alkali metal compound.

3. 3. The product management label material as described in 1 or 2 above, wherein the sheet-shaped substrate is colored other than white.

4. 4. The product management label material as described in any one of the above items 1 to 3, further comprising an adhesive layer for temporarily fixing the product.

5. The label material for product management according to any one of items 1 to 4, wherein the adhesive layer is colored.

6. In the label material for product management, which is composed of a sheet-shaped base material mainly composed of an inorganic compound, glass frit and an organic binder, the sheet-shaped base material is different in color.
Label material for product management, which is composed of two layers.

7. A method for forming a management pattern on a product, comprising: a sheet-like base material composed of an inorganic compound, a glass frit, an organic binder, and a layered silicate synthesized by heating talc and an alkali metal compound. A feature is that a recognition pattern layer made of an ink containing an inorganic compound and glass frit is provided, or a label material having a changed color tone and shape of a sheet is provided for recognition, and the label material is pasted to a product to be managed and then baked. To form a control pattern on the product.

8. A method for forming a management pattern on a product, which comprises a product management label material comprising a sheet-shaped base material composed of two layers, which are mainly composed of an inorganic compound, a glass frit, and an organic binder and have different colors. A method for forming a management pattern on a product, which comprises forming and recognizing a pattern by erasing a part of the surface layer with a laser beam after applying the product to the product to be managed and then baking.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION As the inorganic compound which is one of the constituent components of the sheet-shaped substrate in the present invention, those showing a clear contrast with the recognition pattern after firing are preferable. For example, when the base material is white or close to white, SiO ₂ , ZrO ₂ , TiO ₂ , Al ₂ O ₃ , and Ca are used.
Examples thereof include metal compounds such as carbonates, nitrates, and sulfates which are oxidized to metal oxides at the firing temperature of powders of metal oxide ceramics such as O and label materials.
These metal oxides and metal compounds may be used alone or in admixture of two or more, if necessary.

According to the research conducted by the present inventor, the label material is 4
When firing at a low temperature of 50 ° C. or lower, the thermal decomposition of the organic binder is often incomplete, and the whiteness of the sheet-shaped substrate may be significantly reduced due to the influence of the remaining ash.
Therefore, in the present invention, when a layered silicate (a white pigment and also called synthetic mica) synthesized by heating talc and an alkali metal compound is blended, the sheet-shaped base material has a high content. It has been found that whiteness is imparted, and as a result, a fired product having sufficient whiteness can be obtained even by firing at a considerably low temperature (about 450 ° C. or lower).

The white pigment or synthetic mica has not only excellent whiteness, but also has a scaly form. Therefore, the use of the white pigment or the synthetic mica remarkably improves the film-forming property of the sheet-shaped substrate after firing. The remarkable effect of improving is also achieved. In addition,
In the present specification, "good film-forming property" means that even if the label material and the adherend are fired with dust, bubbles, etc., large pinholes are originally formed in the fired sheet. A phenomenon that occurs, a phenomenon in which microcracks are generated on the entire surface of the sheet due to contraction of the sheet due to melting of glass during firing is suppressed, and a uniform fired body layer having no defects or very few defects is formed. means.

Further, it is necessary to identify the label material by color, but if it is desired not to leave the color after firing,
An organic solvent-soluble dye composed of an azo dye, a metal complex of another dye, or an organic dye may be blended in the sheet-shaped substrate. In addition, if it is necessary to identify the label material by color, and if it retains its color after firing, blend inorganic pigments such as titanium yellow, cobalt oxide, molybdenum red, cadmium yellow, and cadmium red into the sheet-shaped substrate. You can keep it.

The glass frit, which is another constituent component of the sheet-shaped substrate, is 400 to 1500 ° C. of the label material.
After the firing at a certain degree, the metal oxide or the metal compound serves as a sheet-like shape-retaining material as well as an adhesive for adhering the sheet to an adherend.
Such a glass frit is not particularly limited, but may be 400 to 15 depending on the kind of product to be managed.
What softens or melts in the range of about 00 ° C. may be appropriately selected and used. More specifically, 400 to 600 ° C
In the case of firing in the low temperature range of 1, the lead glass system is used, and in the case of firing in the medium temperature range of about 500 to 1000 ° C., lead borosilicate glass system, soda glass system, etc. are used. When firing is performed in a high temperature range of about 0 ° C. or higher, it is preferable to use a silicate glass type or a quartz glass type.

As this glass frit, it is preferable that the glass frit also exhibits a color close to that of the ceramic in the coexistence state with the ceramic (inorganic compound) after firing and shows a clear contrast with the recognition pattern.

The organic binder mixed to form the inorganic compound and the glass frit into a sheet is as follows:
It is required that the sheet-like material can be sufficiently pyrolyzed at the time of firing to leave no ash content, and can be imparted with strength, flexibility, and appropriate hardness suitable for a label to a sheet. Especially,
When the firing temperature is low, the thermal decomposition of the organic binder is insufficient and undecomposed matter tends to remain, so it is necessary to pay particular attention to the selection.Acetal-based, nitrocellulose-based, acrylic-based resins Materials such as are suitable.
When the firing temperature is high, the above restrictions are relatively small, and urethane-based, ethylcellulose-based, vinyl-based, butyral-based, polyester-based resins and the like can be used in addition to the above materials. Further, when the firing temperature is low and the combustion decomposition of the binder is not sufficiently performed, a known peroxide (for example, sodium peroxide, calcium peroxide, magnesium peroxide, etc.) is used as a combustion improver in an amount of 5% by weight of the binder. It is preferable to add about 15%. The organic binder is usually used as an organic solvent solution of about 5 to 50% by weight.

The organic solvent is not particularly limited, but butyl carbitol, ethyl acetate, butyl cellosolve acetate, methyl ethyl ketone, methyl isobutyl ketone,
Examples include isopropyl alcohol and toluene.

Further, in the preparation of the raw material mixture for producing the label material, known plasticizers, dispersants, defoaming agents and the like can be appropriately added as necessary. further,
If necessary, a calcined body-forming component other than an inorganic compound, for example, an inorganic powder or inorganic fiber composed of a non-metal oxide ceramic, a metal or an alloy, a metal oxide, a filler, and the like may be used in combination.

Inorganic compounds different from the above which are used in the ink for forming the recognition pattern have excellent heat resistance, corrosion resistance, durability and the like, and show a clear contrast with the sheet-like substrate after firing. If it is, it will not be specifically limited. When the sheet-shaped substrate has a white color or a color close to white, an inorganic compound such as F
e, oxides of single metals such as Cr, Co and Mn, mixed metal oxides consisting of two or more of these metals, mixed oxides consisting of two or more single metal oxides, and for ceramics Examples include various black pigments used in.

The glass frit used in the ink may be the same as that used in the sheet-shaped substrate, but it is preferable that the glass frit exhibits a color close to that of the recognition pattern layer formed after firing. As the organic binder and the organic solvent used for preparing the ink, the same ones as those used for producing the sheet-shaped substrate can be used.

In the present invention, since it is sufficient that a clear contrast exists between the sheet-shaped substrate and the recognition pattern layer, the inorganic material used in the sheet-shaped substrate and the inorganic material used in the ink. You may replace and use. Alternatively, even if there is a clear color difference between the sheet-shaped base material and the recognition pattern layer, accurate pattern recognition is performed, and thus an inorganic material capable of forming such a color difference. May be selectively used.

The label material for product management of the present invention is usually manufactured as follows. First, the first inorganic compound 3-9
A solid content of about 20 to 100 parts by weight of a mixture of 0% by weight and 10 to 97% by weight of glass frit.
A solution of an organic binder corresponding to 80 parts by weight is added and kneaded to prepare a paste, and the paste is processed into a base material. When processing into a sheet, it may be applied onto a substrate film (for example, a release film or release paper).
The mixing ratio of the inorganic compound and the glass frit is mainly determined depending on the baking temperature of the label material with respect to the adherend, the smoothness of the label after baking, etc., and when the baking temperature is low, the label surface after baking is When high smoothness is required, glass frit with a low melting point is often used. On the other hand, when the baking temperature is high or when the smoothness of the label surface is not so required, a large amount of inorganic compound is used.

In parallel with this, other inorganic compounds 5 to 90
An organic binder corresponding to about 5 to 50 parts by weight as a solid content is added to 100 parts by weight of a mixture of 10% by weight to 10% to 95% by weight of glass frit and kneaded to obtain an ink for forming a recognition pattern layer.

Next, this ink is applied to the above-mentioned sheet-shaped substrate in a predetermined pattern to obtain the label material for product management of the present invention. The form of the pattern is not limited to the so-called bar code, and may be formed using any other figure,
Further, any identification symbol such as company name, lot number, product name, delivery destination, export country name, etc. may be used. Further, the pattern may be formed in a plurality of colors as long as the contrast with the sheet-shaped substrate can be obtained. When forming the pattern,
Screen printing may be directly performed on the sheet-shaped substrate, or a printing means such as a thermal transfer ribbon, a dot impact printer, an inkjet printer, an electrostatic printer or the like may be used.

Furthermore, it is possible to add a further recognition means by adjusting the color or shape of the sheet-like base material without or using ink. In particular, in order to confirm whether or not the baking process has been passed, a dye that is burnt at high temperature is mixed in the sheet-shaped base material,
Means for coloring the substrate are extremely useful.

In the product management label material of the present invention, an adhesive is applied to the surface of the sheet opposite to the surface on which the recognition pattern layer is formed, and a release film or release paper is stuck thereon. Is advantageous in handling.

As the pressure-sensitive adhesive, one that decomposes and disappears during baking may be selected. When using, remove the release film or release paper from the label material for product management and attach the label to the product to be managed or the pallet for product transportation or product holding with an adhesive,
The firing may be performed at a predetermined temperature within the range of 400 to 1500 ° C.

The pressure-sensitive adhesive is not particularly limited, and a rubber-based pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive, which is decomposed and removed by firing,
A vinyl alkyl ether-based adhesive or the like is used. More specifically, natural rubber or synthetic rubber such as butyl rubber, polyisoprene rubber, styrene butadiene rubber, styrene isoprene styrene block copolymer rubber, a rubber-based pressure-sensitive adhesive comprising a single polymer; and further such a polymer. 10 to 300 parts by weight of tackifying resin such as petroleum-based resin, terpene-based resin, rosin-based resin, xylene-based resin, coumarone-intene-based resin, etc. to 100 parts by weight and other softening agents, antioxidants, fillers, etc. A rubber-based pressure-sensitive adhesive obtained by adding the compounding agent described above; or an acrylic-based pressure-sensitive adhesive mainly composed of a polymer of an alkyl ester of acrylic acid or methacrylic acid is used.

Generally, the thickness of the pressure-sensitive adhesive layer has a great influence on the adhesive strength of the label to the adherend after firing as well as before firing. If the pressure-sensitive adhesive layer is too thin, the adhesion will be insufficient, whereas if it is too thick, the pressure-sensitive adhesive will not be sufficiently decomposed and may not adhere during firing. However, it is usually difficult to control the thickness of the adhesive layer. Further, when it is necessary to automatically recognize the front and back of the label before fixing the label to the product, it is impossible to distinguish the conventional label because the front and back have the same color.

In the present invention, by coloring the pressure-sensitive adhesive layer, the thickness of the pressure-sensitive adhesive layer can be controlled by the density of the color, and the color of the label surface can be detected by a color sensor to detect the label. The front and back of the material can be identified. The dye for coloring the pressure-sensitive adhesive layer is not particularly limited, but examples of dyes whose color is burned off by firing include azo dyes and metal complexes of other dyes. Further, a dye soluble in an organic solvent or another organic dye may be used. On the other hand, when the color remains after firing, titanium yellow, cobalt oxide, molybdenum red, cadmium yellow, cadmium red or the like can be used.

Alternatively, the label material according to the present invention may be fired after being attached to a product to be managed by a slide transfer method or a pallet for product transportation or product holding without using an adhesive agent. .

[0038]

The label material for product management according to the present invention is
It has the following effects.

A. Manufacturing cost is low.

B. Since it has a high degree of flexibility, it can be used by directly pasting it on products of any shape. In addition, since the recognition pattern layer can be easily formed on-site, even if the production line is often changed in an automated factory that performs high-mix low-volume production,
You can respond immediately.

C. After firing, it becomes a sintered body having excellent heat resistance, chemical resistance, water resistance, durability, etc., so that highly reliable product management can be performed.

D. Since a layered silicate with excellent whiteness, which is synthesized by heating talc and an alkali metal salt, is added, sufficient contrast can be obtained between the base material and the recognition pattern, so high-level product management is easy. Becomes

[0043]

EXAMPLES Examples will be shown below to further clarify the features of the present invention.

Example 1 The following materials were uniformly kneaded by a roll mill to form a paste, which was first coated with a doctor blade type coating machine.
Apply to the release surface of the release film, and dry it to a thickness of about 5
A 0 μm coating film was formed.

Next, the coating film is wound together with a release film on a roll, and an acrylic resin-based pressure-sensitive adhesive to which a red dye is added is applied to the coating film by a gravure coating machine and dried to give a red adhesive having a thickness of about 20 μm. After forming the agent layer, the second release film was laminated on the pressure-sensitive adhesive layer. Next, the first release film was peeled off to obtain a label material made of a laminated material including the second release film, the pressure-sensitive adhesive layer and the sheet-shaped substrate.

[0046]

[Table 1]

On the other hand, the ink having the composition shown in Table 2 was used to form a bar code pattern on the sheet-like substrate by a screen printing method to obtain a product management label according to the present invention. .

[0048]

[Table 2]

Next, the second product management label obtained
The release film was peeled off, and it was attached to a glass product with an adhesive, and the glass product was baked at 450 ° C for 30 minutes. Prior to melting the glass frit, the organic binder and adhesive in the label were completely pyrolyzed. As a result, a black bar code pattern was formed with a clear contrast on a substrate having an extremely good whiteness, and the product could be easily controlled.

The adhesive layer which was red in color before firing fully fulfilled the function of identifying the front and back of the label material, and completely disappeared after firing.

Example 2 The composition shown in Table 3 below was processed into a sheet in the same manner as in Example 1, and then a bar code pattern was formed using an ink having the composition shown in Table 4 below. Was screen printed.

[0052]

[Table 3]

[0053]

[Table 4]

The product management label thus obtained was labeled with Mn.
When it was attached to Zn ferrite and the ferrite was baked at 900 ° C. for 1 hour, the binder and adhesive in the label were completely pyrolyzed prior to the melting of the glass frit, and a black bar was formed on the white base material. -The code pattern is formed with a strong contrast, and the product can be easily managed.

The label was green before firing, but became white after firing, and it was possible to easily confirm the presence or absence of firing.

Example 3 The composition shown in Table 5 below was processed into a sheet in the same manner as in Example 1, and then the composition shown in Table 6 below was applied thereon to form a two-layer sheet. .

[0057]

[Table 5]

[0058]

[Table 6]

When an adhesive layer was formed on this in the same manner as in Example 1, a label material having a white front surface and a black back surface was obtained. Then, after sticking this on a metal plate, it is covered with a laser.
When the dots were drawn, the white layer on the surface disappeared due to the heat of the laser, the lower black layer appeared, and a clear bar code pattern was formed. Moreover, by adjusting the laser output, it was possible to draw without causing any thermal damage to the underlying metal.

Next, when the above metal plate was fired at 600 ° C., the bar code pattern was directly fused to the metal to form a product identification pattern excellent in heat resistance, chemical resistance and durability.

Claims (8)

[Claims] 1. A label material for product management comprising a sheet-shaped base material containing an inorganic compound, a glass frit and an organic binder as main components, wherein the sheet-shaped base material is synthesized by further heating talc and an alkali metal compound. Label material for product management, characterized in that it contains layered silicate. 2. A label material for product management, comprising a sheet-like base material containing an inorganic compound, a glass frit and an organic binder as a main component, and a recognition pattern layer made of an ink containing another inorganic compound and a glass frit. A label material for product management, wherein the base material further contains a layered silicate synthesized by heating talc and an alkali metal compound. 3. The sheet-shaped substrate is colored other than white.
Or the label material for product management described in 2. 4. The label material for product management according to claim 1, further comprising an adhesive layer for temporarily fixing the product. 5. The label material for product management according to claim 1, wherein the adhesive layer is colored. 6. A label material for product management comprising a sheet-shaped base material containing an inorganic compound, a glass frit and an organic binder as main components, wherein the sheet-shaped base material is composed of two layers having different colors. Label material for product management. 7. A method for forming a management pattern on a product, which is a sheet-like group comprising an inorganic compound, a glass frit, an organic binder and a layered silicate synthesized by heating talc and an alkali metal compound. A method for forming a management pattern on a product, which comprises providing a recognition pattern layer made of an ink containing another inorganic compound and glass frit on a material, applying the recognition pattern layer to a product to be managed, and then baking the product. 8. A method for forming a management pattern on a product, which comprises a sheet-like base material composed of two layers of different colors, which are mainly composed of an inorganic compound, a glass frit and an organic binder. After forming a management label material and applying it to the product to be managed, part of the surface layer is erased by laser light and then baked to form a recognition pattern, which forms a management pattern on the product. how to.