JPH0627880A - Period lapse display label and its use method - Google Patents

Abstract

PURPOSE:To provide the period lapse display body which can display the lapse of periods of several minutes to several months and is stable without receiving the influence of light, humidity and other factors in the atm. air by sticking a period display layer consisting of a transparent protective film, a concealing and dye diffusion layer and a tacky adhesive layer formed on the layer onto image receiving paper printed with dye images. CONSTITUTION:This period lapse display label is constituted of the transparent protective film 11, the concealing and dye diffusion layer 12, the tacky adhesive layer 13 and a release layer 14. The period lapse display label is stuck onto the image receiving paper 2 printed with the dye images 21. Generally used plastic films are usable as the transparent protective film 11. The concealing and dye diffusion layer 12 is constituted of a pigment, plasticizer and high- polymer binder. The tacky adhesive layer 13 and release layer 14 which are generally used are usable. As a result, the periods from several minutes to several months are displayed as visible images on the transparent protective film 11 surface side according to the dye diffusion functions of the concealing and dye diffusion layer 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lapse display label, and in particular, has a limited effective period of X-ray-sensitive films, photographic papers, photosensitive papers, cosmetics, batteries, oils, chemicals and the like. It is applied to a product or a time-limited entry certificate etc. with anti-counterfeiting, and it can be seen at a glance whether it is within its validity period label (hereinafter referred to as "time indicator" or simply "indicator"). Call).

[0002]

2. Description of the Related Art The following is a method of expressing the period such as the expiration date of a product. For example, in a volatile drug, the active ingredient may be in the form of a solution or wax, and volatilization of these may be visually observed from the outside of the container. This type cannot be applied to all products because the properties of the active ingredient itself are limited to volatile ones. Regardless of the active ingredient, there are indicators that use the volatility of the substance as an indicator of the period, and the degree of coloring decreases due to volatilization of colored liquids (including those absorbed in gel) and volatilization of sublimable dyes. There is something to see. However, the volatilization of substances is greatly affected by temperature and humidity, and it is difficult to show an accurate period, and the volatilized substances may contaminate the surrounding air.

Other examples are light, temperature, humidity, or
A time indicator that can judge the elapsed period is also conceivable by a color change caused by gases such as oxygen (O ₂ ) and carbon dioxide (CO ₂ ) in the atmosphere.

However, the light, temperature, humidity, etc. change greatly in daily life, and therefore, the time indicator using these causes color change before the scheduled period elapses, or the scheduled period elapses. It is difficult to obtain a stable time indicator because the color does not change even after doing. In addition, a colorant that changes its color depending on the amount of O _{2 in} the atmosphere, such as methylene blue, is placed in a bag made of a plastic film having a certain amount of oxygen permeability, and the plastic film is sealed in a vacuum state, and this plastic film is aged over time. A method was also studied in which the colorant is discolored by O ₂ penetrating and penetrating and the elapsed time is measured, but in general, the oxygen permeation amount of a plastic film changes depending on the ambient temperature and humidity. Therefore, it is difficult to obtain a stable time indicator that can always measure the passage of a certain period.

Furthermore, by using CO ₂ instead of O ₂ ,
A bag made of plastic film having a certain amount of carbon dioxide gas permeability, and sealed under vacuum put colorant color change by a change in pH in the atmosphere, the atmosphere due to CO ₂ entering passes through the plastic film There is also a method of changing the color of the colorant by changing the pH, but this time indicator can not display the effective period of fragrance, deodorant or insect repellent, that is, the period of several months to several years, It has the drawback of discoloring in a short time (several hours to several tens of hours) and is sensitive to the influence of humidity, so it cannot be used as an indicator for displaying the elapsed time in such applications.

[0006]

SUMMARY OF THE INVENTION The present invention has been made by paying attention to such a problem. The problem is that the progress of a period of several minutes to several months can be displayed, and
An object is to provide a stable time-lapse indicator which is not affected by light, humidity or other atmospheric factors.

[0007]

The invention according to claim 1 provides a concealing and dye diffusion layer comprising a pigment, a plasticizer and a polymer binder on a transparent protective film, and an adhesive layer on the layer. The time-lapse display label is characterized in that a release paper is attached on the time-lapse display layer.

The invention according to claim 2 is a time-lapse display layer comprising a concealment and dye diffusion layer comprising a pigment, a plasticizer and a polymer binder on a transparent protective film, and an adhesive layer on the layer. A method of using a period-lapse display label, characterized in that a release paper is stuck on the label, the label being stuck on an image-receiving paper on which a dye image is printed, and the transparent protective film surface side A method of using a period elapsed display label, characterized in that a dye image diffused in the image is displayed to indicate the passage of time.

The principle of the present invention utilizes the diffusion of dyes, as is apparent from the components of the present invention. Since the control of the diffusion of the dye can be arbitrarily designed depending on the thickness of the hiding and dye diffusion layer, the type of the polymer binder and the addition amount of the plasticizer, it is possible to visually display an arbitrary period. To do.

The present invention will be described in detail below. FIG. 1 is a cross-sectional view of a period elapsed display label of the present invention. The time-lapse display label (1) comprises a transparent protective film (11), a hiding and dye diffusion layer (12), an adhesive layer (13) and a peeling layer (14).

The transparent protective film (1 used in the present invention
As for 1), any plastic film which is generally used can be used. For example, cellophane, acetate, vinyl chloride, polyethylene, polypropylene, polyester, tetrafluoroethylene, vinyl fluoride,
Films such as polyimide, polycarbonate, polystyrene and the like.

The hiding and dye diffusion layer (12) used in the present invention comprises a pigment, a plasticizer and a polymeric binder. It is preferable that the pigment has a high hiding property. For example, titanium oxide, zinc oxide, lithopone, lead white, cadmium yellow, yellow lead, titanium yellow, zinc chromate, loess,
Chromium vermilion, red pigment, amber, yellow iron oxide, red iron oxide, cadmium let, dark blue, lead tin, chrome oxide green, cobalt blue, ultramarine, cobalt violet, iron black, and other inorganic pigments and benzidine yellow, Hansa yellow, resole Let, Alizarin Rake, Pigment Scarlet 3B, Brilliant Carmine 6B,
Permanent Red F-5R, Lake Red C, Permanent Red 4R, Rhodamine Lake B, Rhodamine Lake Y, Para Red, Peacock Blue Lake, Phthalocyanine Blue, Aniline Black, Permanent Yellow HR, Quinacridone, Perinone Perylene, Chromophtal Yellow 6G, Examples include organic pigments such as Chromophtal Yellow 3G and Chromophtal Yellow GR. Particularly preferred are the above-mentioned pigments such as white, yellow, red and blue.

The plasticizer used in the present invention must be relatively sparingly volatile and compatible (compatible) with the polymeric binder used. Any such compound can be used. For example, phosphoric acid esters such as tributyl phosphate, tri-2-ethylhexyl phosphate, tricresyl phosphate, dimethyl phthalate, diethyl phthalate, dibutyl phthalate, diheptyl phthalate, di-n-octyl phthalate, di2-ethylhexyl phthalate, phthalic acid. Diisononyl, dioctyldecyl phthalate, butylbenzyl phthalate and other phthalates, butyl oleate, glycerin monooleate and other aliphatic monobasic esters, dibutyl adipate, di-n-hexyl adipate,
Aliphatic dibasic acid esters such as di2-ethylhexyl adipate, alkyl 610 adipate, di2-ethylhexyl azelate, dibutyl sebacate, di2-ethylhexyl sebacate, diethylene glycol dibenzoate, triethylene glycol di2-ethyl butyral Dihydric alcohol ester such as acetyl ricinoleate, butyl acetyl ricinoleate, butyl phthalyl butyl glycolate, oxy acid ester such as tributyl acetyl citrate, chlorinated paraffin, methyl abietic acid, trimellitic acid plasticizer, polyester Plasticizer,
Examples thereof include epoxy plasticizers and stearic acid plasticizers.

As the polymer binder used in the present invention, any thermoplastic resin can be used. Examples of the thermoplastic resin include ester resins such as linear saturated polyester, vinyl chloride resins such as polyvinyl chloride and vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate copolymer, vinyl acetate resin, styrene resin, butyral resin. ,
Acrylic acid resin, methacrylic acid resin, epoxy resin, styrene-butadiene copolymer, styrene-acrylonitrile resin, petroleum resin, chlorinated polypropylene,
Examples thereof include polyamide resins, cellulose resins, polyvinyl alcohol resins, ionomer resins, ethylene-acrylic acid copolymers, polyurethane resins and the like. The thermoplastic resins described above may be used alone or in combination of two or more.

In the present invention, the composition ratio of each composition of the hiding and dye diffusion layer is not limited, but the plasticizer which controls the diffusion of the dye is used in the range of 0 to 60 parts by weight based on 100 parts by weight of the solid content. It is preferable. The coating amount is preferably 5 to 50 g / m ² in consideration of the hiding property and the dye diffusing ability.

The pressure-sensitive adhesive layer (13) used in the present invention is
A commonly used adhesive can be used. The adhesive is
It is roughly classified into three types. Rubber, acrylic and silicone adhesives. These pressure-sensitive adhesives are composed of auxiliaries such as elastic bodies, tackifiers, plasticizers, fillers and antioxidants. Specifically, as the elastic body, natural rubber, synthetic isoprene, recycled rubber, SBR rubber, polyisoprene rubber, polyacrylic acid ester or its derivative, styrene-isoprene-styrene rubber, silicone rubber, silicone resin and the like are used. Tackifiers are rosin-based and rosin-derivatives, polyterpene resins, chroman-indene resins, petroleum-based resins, terpene-phenolic resins and the like. Examples of the plasticizer include liquid polybutene, mineral oil, lanolin, liquid polyisoprene, and liquid polyacrylate. If necessary, a filler such as an extender pigment or an inorganic pigment and an antioxidant such as an antioxidant are added.

The coating amount of the pressure-sensitive adhesive layer of the present invention is preferably 5 to 25 g / m ² in consideration of the pressure-sensitive adhesive ability and the dye transfer ability.

The release layer (14) used in the present invention may be any of those generally used.
For example, it is a paper obtained by extrusion-coating polyethylene whose surface is coated with silicone, a kraft paper which is clay-painted and then spar calendered, a glassine paper, and various plastic films.

The label (1) for indicating the passage of time is first prepared by coating the composition of the hiding and dye diffusion layer with a suitable solvent, and coating the coating on the permeation protection film (11) with a gravure coater, roll coater, bar coater, reverse coater. , A comma coater, a die coater, etc., and then dried, and then the adhesive layer composition is made into a coating material and applied, and at the same time, a release paper is laminated. The method for making the pressure-sensitive adhesive layer composition into a coating material and applying it is the same as that for the hiding and dye diffusion layer composition.

The time-lapse display label (1) thus obtained is attached from the pressure-sensitive adhesive layer (13) side to the image-receiving paper on which the dye image is printed in advance by peeling off the release layer (14). After pasting, a period of several minutes to several months can be displayed as a visible image on the side of the transparent protective film (11) depending on the hiding and diffusing ability of the dye diffusion layer composition designed in advance. Dyes that can be used here include oil-soluble dyes and disperse dyes. Specifically, for example, as oil-soluble dyes, azo dyes such as solvent yellow 2, solvent orange 1, solvent red 24, solvent brown 3, solvent yellow 10, solvent orange 5, solvent brown 37, solvent orange 5, solvent red 5, etc. Azo metal complex salts such as 8 and the like, anthraquinone dyes such as Solvent Violet 13, Solvent Blue 11 and Solvent Green 3, phthalocyanine dyes such as Solvent Blue 25 and the like.

As disperse dyes, Disperse Orange 3, Disperse Red 1, Disperse Yellow 3, Disperse Violet 24, Disperse Blue 44
And other aminoazo dyes, Disperse Orange 11, Disperse Red 4, Disperse Violet 1, Disperse Blue 4 and other aminoanthraquinone dyes, Disperse Yellow 1 and 42, and utroarylamine dyes. Here, the disperse dye also includes a sublimation dye.

FIG. 2 shows an example in which the period elapsed display label (1) shown in FIG. 1 is pasted on an image receiving paper on which a dye image is printed. (2) is an image receiving paper body on which a dye image is printed. (21) is a dye image.

[0023]

According to the present invention, a transparent protective film, a hiding and dye-diffusing layer, and a time-lapse indicator label comprising an adhesive layer on the layer are laminated on an image-receiving paper on which a dye image is printed, whereby hiding and It becomes possible to display a visible image on the transparent film surface side for a period of several minutes to several months depending on the dye diffusing ability of the dye diffusing layer.

[0024]

EXAMPLES The present invention will be described in detail below with reference to examples. In the examples, "part" indicates part by weight.

(Example 1) <Composition of hiding and dye diffusion layer paint> Vinyl chloride-vinyl acetate copolymer 20 parts (SLESC C manufactured by Sekisui Chemical Co., Ltd.) Polyester resin 2 parts (Unitika UE) -3200) Titanium oxide 40 parts Plasticizer 10 parts (Dioxyl phthalate) Toluene / 2-butanone (1/2) 80 parts

<Composition of pressure-sensitive adhesive layer coating> One-component solvent-based acrylic pressure-sensitive adhesive 10 parts Toyo Ink Mfg. Co., Ltd. Olivine BPS4627-36T Solid content: 35 wt% Solvent: ethyl acetate / toluene ethyl acetate / toluene (1 / 1) 10 copies

On the transparent polyester film having a thickness of 35 μm, the above concealing and dye-diffusing layer coating composition, which was previously uniformly dispersed by a sand mill, was coated and dried using a wire bar so that the dry weight was 10 g / m ^2. Then, a hiding and dye diffusion layer was obtained. On the layer, the above-mentioned pressure-sensitive adhesive layer coating was applied and dried using a wire bar so that the dry weight was 7 g / m ² , and a pressure-sensitive adhesive layer was provided to obtain a time-lapse display layer.
A release paper was attached on the layer to produce a time-lapse label.

(Example 2) The composition of the hiding layer and the dye diffusion layer is substantially the same as that of Example 1 except that permanent red 4R, which is an organic pigment, is used instead of titanium oxide. is there.

(Example 3) This is substantially the same as the time-lapse label according to Example 1 except that 4 parts of a plasticizer (dioctyl phthalate) was used as the composition for the hiding layer and the dye diffusion layer.

(Example 4) <Composition of hiding and dye diffusion layer coating composition> Polyester resin 20 parts (Vylon 103 manufactured by Toyobo Co., Ltd.) Titanium oxide 50 parts Plasticizer 2 parts (Di-2-ethylhexyl sebacate) Toluene / 2-Butanone (2/1) 80 parts

<Composition of adhesive layer coating> Synthetic rubber adhesive Toyo Ink Mfg. Co., Ltd. Olivine BPS3757-1 Solid content: 27% by weight Solvent: Toluene / n-hexane / acetone

On a transparent polyester film having a thickness of 35 μm, the above-mentioned concealing and dye-diffusing layer paint, which had been uniformly dispersed by an attritor, was applied by a wire bar so that the dry weight was 20 g / m ^2. Dried to obtain a hiding and dye diffusion layer. The adhesive layer coating composition was applied onto the layer using a wire bar so as to have a dry weight of 10 g / m ² and dried to provide an adhesive layer to obtain a time-lapse display layer. A release paper was attached on the layer to produce a time-lapse label.

(Example 5) <Composition of hiding layer and dye diffusion layer coating composition> Methyl methacrylate-methacrylic acid ester copolymer 20 parts (Mitsubishi Rayon Co., Ltd., Diamer BR-60) Polyester resin 3 parts (Unitika) UE-3200 manufactured by Co., Ltd.) Titanium oxide 40 parts Plasticizer (dimethyl phthalate) 1.5 parts Toluene / 2-butanone 80 parts

<Composition of adhesive layer coating> Acrylic ester type adhesive Toyo Ink Mfg. Co., Ltd. Olibain BPW5449 Solid content 60 Solvent water

On the transparent polyester film having a thickness of 35 μm, the above-mentioned concealing and dye-diffusing layer, which was uniformly dispersed by an attritor, was coated and dried with a wire bar so that the dry weight was 30 g / m ^2. To obtain a hiding and dye diffusion layer. On the layer, the above adhesive layer coating material was applied and dried using a wire bar so that the dry weight was 20 g / m ² , and an adhesive layer was provided to obtain a period display layer. A release paper was attached to the layer to produce a time-lapse display label.

(Evaluation) On the image receiving paper on which the blue oil-soluble dye (Solvent Blue 25 manufactured by Hodogaya Chemical Co., Ltd.) was printed in advance by peeling off the release paper of the time-lapse display labels obtained in Examples 1 to 5. The label is attached to the adhesive layer from the side of the adhesive layer, and the elapsed time of the saturation concentration of the dye image diffused to the transparent protective film side of the produced label is measured by RD made by Macbeth.
It measured using the reflection densitometer of -918. The measured results are shown in Table 1. As is clear from Table 1, it is possible to arbitrarily display the passage of time by changing the composition of the hiding and dye diffusion layers.

[0037]

[Table 1]

* Evaluation atmosphere temperature: 20 ° C. * Blue dye image density: 1.98

[0039]

According to the present invention, a transparent protective film, a concealing and dye-diffusing layer, and a time-lapse display layer comprising an adhesive layer on the layer are laminated on an image-receiving paper on which a dye image is printed. It is possible to provide a stable time-lapse display that can display the progress of a period of several minutes to several months and that is not affected by light, humidity, or other factors in the atmosphere.

Further, the diffusion speed of the dye can be arbitrarily controlled by the thickness of the hiding and dye diffusion layer, the kind of the polymer binder and the addition amount of the plasticizer.

[0041]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the structure of a period elapsed label according to an embodiment.

FIG. 2 is a cross-sectional view showing a structure of a period elapsed display body according to the embodiment.

[Explanation of symbols]

 1 Time-lapse display label 2 Image receiving paper on which dye image is printed 11 Transparent protective film 12 Concealment and dye diffusion layer 13 Adhesive layer 14 Release layer 21 Dye image

Claims (2)

[Claims] 1. A release paper is pasted on a time-lapse display layer comprising a concealment and dye diffusion layer comprising a pigment, a plasticizer and a polymer binder on a transparent protective film, and an adhesive layer on the layer. A time-lapse display label characterized by being combined. 2. A release paper is pasted on a time-lapse display layer comprising a concealment and dye diffusion layer comprising a pigment, a plasticizer and a polymer binder on a transparent protective film, and an adhesive layer on the layer. A method of using a time-lapse display label, characterized in that the dye image is diffused to the transparent protective film surface side by laminating the label on an image-receiving paper on which a dye image is printed. Is used to indicate the passage of time, and how to use the time-lapse label.