JPH06202560A - Moisture reactive label - Google Patents

Abstract

PURPOSE:To make the color of a colored layer change by submerging the product and to discriminate the change even after drying by using a dye being colored with moisture, decolored or discolored and root returning to the original state as a colorant of the colored layer. CONSTITUTION:A moisture reactive label consists of a base material 1 and the colored layer 2. The colored layer 2 uses the dye being colored with moisture, decolored or discolored and also not returning to the original state after drying as the colorant, and the dye is dispersed into an optional binder to prepare an ink and the label is formed by applying the ink on the base surface. In this case, the reaction speed between the dye and moisture and the sensitivity can be controlled by a kind of the using binder and the quantity and also the flowing down, when the dye coming into contact with moisture, can be prevented. Such a moisture reactive label can be used as indicators of an electric product generating troubles such as fault in case of sticking of moisture and submergence or 8 fine instrument, etc., and a bottom part of a case conveying and storing a container.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-reactive label which is attached to the inside of an electric product or the like used outdoors and used to determine whether the electric product or the like has a history of being submerged in water. It is a thing.

[0002]

2. Description of the Related Art Radios, video cameras, pagers,
Electric appliances and the like used outdoors such as mobile phones have a relatively high risk of getting wet with rain or splashing with water, so that some degree of water resistance is considered. However, if you drop it in a puddle or drop it in a container filled with water, the internal circuits may get wet and the function as an electrical product may be impaired. , Is subject to paid repairs due to the carelessness of the user, that is, the general consumer. However, it is difficult to determine whether the cause of the failure is due to submersion in water or in the range of normal use, which may cause trouble.

Therefore, a label coated with a water-based ink is adhered to the inside of the product in advance, and when a failure occurs, the state of the label is checked to see if the water-based ink is bleeding or discolored. The cause of the failure was determined by whether or not

However, in the conventional label, (1) the bleeding ink stains the inside of the machine. (2) It is difficult to control the amount of water necessary for bleeding, and as a result, bleeding does not occur unless a large amount of water acts. (3) If the same type of ink is available, the label can be tampered with. (4) When an ink using a cobalt-based or amine-based dye is used, it can be determined that the ink is submerged due to the discoloration of the ink, but when it is dried, it returns to its original state and cannot be identified. There was a drawback.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above conventional circumstances, and it is clearly discriminated that the colored layer changes due to the submersion of the product, and the change occurs even after drying. It is possible to provide a label which can be produced and which does not have a problem of soiling the inside of the machine.

[0006]

That is, the present invention is a label comprising a base material and a colored layer, the colored layer being colored, discolored or discolored by moisture and returning to its original state after drying. It is a moisture-reactive label characterized by using a dye not used as a colorant.

Hereinafter, the moisture responsive label of the present invention will be described in detail with reference to the drawings. That is, the moisture-reactive label of the present invention comprises a substrate (1) and a colored layer (2) as shown in FIG. The substrate (1) can be arbitrarily used as long as it has been conventionally used as a label substrate such as paper and synthetic resin film. However, when a material having a water absorbing layer formed on the surface of these base materials, a porous structure, a non-woven fabric, or the like is used, when the dye in the coloring layer penetrates into the water absorbing layer or the base material and comes into contact with water. Also, it is preferable because it can prevent runoff.
Further, even when this dye reacts with water, water gradually penetrates into the water-absorbent layer or the base material and reacts, so that by adjusting the degree of penetration of the water-absorbent layer or base material into the dye or water. , The reaction speed and sensitivity of dye and water can be controlled.

The colored layer (2) is colored or discolored by moisture.
Alternatively, a dye that loses its color and does not return to its original state after drying is used as a colorant. The dye can be formed by dispersing the dye in an arbitrary binder to form an ink and applying the ink to the surface of the substrate. In this case, the reaction rate and sensitivity of the dye and water can be controlled by the kind and amount of the binder used, and the dye can be prevented from flowing down when it comes into contact with water. In addition, it is possible to form a colored layer having a porous structure by adding a water-absorbing powder together with a binder to control the reaction rate and sensitivity of water with the dye and to add the effect of preventing the dye from flowing off. is there. It is desirable that the water-absorbing powder has hydrophilicity, such as starch, kaolin, talc, fine powder cellulose,
Aluminum silicate, silicon oxide, calcium carbonate, etc. are used. The binder is used to fix the dye and the water-absorbing powder to the substrate, and any resin soluble in an organic solvent can be used. For example, polyester-based resin, acrylic resin, polyamide-based resin, polyacetal-based resin, polyurethane-based resin, epoxy-based resin, petroleum-based resin, cellulose-based resin, etc. can be used, but even if there is no binder, coloring or discoloration due to moisture , Or lose the ability to bleach.

As a means for controlling the reaction rate and sensitivity of the dye and water and for preventing the dye from flowing down when it comes into contact with water, a resin layer through which water can pass is formed on the colored layer (2). There is also a method. That is, on the colored layer (2), polyacrylic acid, isobutylene maleic anhydride,
By coating a resin composition such as polyethylene oxide to form a resin layer, or by laminating films made of these resins to form a resin layer, it is possible to control the amount of water passing through and prevent the dye from flowing off. it can.

The water-reactive label of the present invention having the above-mentioned structure is used for electric appliances and precision instruments which cause troubles such as failure due to adhesion of water or submersion in water, and the bottom portion of a case for transporting or storing a container. It can be used as an indicator for detecting water leaks in water pipes, boiler pipes, water pumps, and the like, as a means for checking water leak paths of various devices and equipment, and the like.

[0011]

Since the water-reactive label of the present invention has the above-mentioned constitution, it can be clearly discriminated that the water-reactive label has been wetted with water even after being immersed in water due to submersion or the like and then the label has dried after a lapse of time. it can. The dye will not run off the label when it gets wet and will not contaminate the inside of the device. The reaction speed and sensitivity of the dye and water can be controlled by selecting the dye, binder, water-absorbing powder or base material to be used, or by surface treatment, and the dye runs off when it comes into contact with water. Can be prevented. Has the effect.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a moisture reaction label of the present invention.

[Explanation of symbols]

 1 base material 2 colored layer

Claims (3)

[Claims] 1. A label comprising a substrate and a colored layer, comprising:
The colored layer develops, discolors, or loses color due to moisture,
A water-reactive label characterized by using a dye that does not return to its original state after drying as a coloring agent. 2. The moisture-reactive label according to claim 1, wherein a base material into which the dye easily penetrates is used. 3. The moisture reaction label according to claim 1, wherein a resin layer through which moisture can pass is formed on the colored layer.