JPH071657Y2 - Bill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a tag having excellent mechanical strength, which is used for airlines attached to luggage such as passengers who use aircraft.

<Prior Art> Generally, a heat-sensitive recording material having a heat-sensitive recording layer mainly composed of a colorless or light-colored leuco dye and a developer that reacts with a leuco dye to develop a color is disclosed in Japanese Examined Patent Publication No. 45-14035. Is
Widely used in practice. A thermal printer or the like having a built-in thermal head is used to perform recording on this thermal recording medium, but such a thermal recording method does not generate noise at the time of recording as compared with other conventional recording methods. Because it does not require development and fixing, is maintenance-free, has a relatively inexpensive and compact device, and produces a very clear color, it can be used for computer output, facsimiles, calculators, measuring instruments, etc. It is widely used as a paper wrapper and label for recorders and vending machines.

In recent years, as one of the fields of application of the above-mentioned thermal recording, a tag which is represented by an airline tag is rapidly spreading.

The airline tag is a luggage tag attached to the luggage of a passenger who uses an aircraft in order to determine the owner, the destination, and the like. The usage environment is harsh, and when the luggage is moved, it is rubbing against the luggage or is sandwiched between the luggage.In addition to damage to the recording part due to scratches, damage to the tag itself due to pulling or tearing force It often happens.

Conventionally, as a label for airlines using a thermosensitive recording medium used under such harsh conditions, a thermosensitive recording paper having a protective layer on the thermosensitive coloring layer is pasted on a synthetic resin film for mechanical strength. The technique of providing a synthetic resin film with the above has been taken.

However, when the thermal recording paper and the film are laminated, the manufacturing process is increased and the cost is increased. Also, the adhesive used for laminating the thermal recording paper and the film causes the grounding of the thermal paper, and the cross-section of the adhesive. There is a problem in that the protrusion from the surface causes troubles such as damage to the thermal head, and also the damage due to tearing occurs depending on whether the synthetic resin film is selected properly.

Furthermore, due to the recent trend toward higher definition of thermal bar code printer printing, the thermal recording material using a paper support has a limit to the fine dot reproducibility, and from this point as well, thermal recording with higher performance is possible. The appearance of a body tag was desired.

<Problems to be solved by the invention> The present invention has been made in view of the above problems, and specifically has sufficient mechanical characteristics necessary for use in airline tags and the like. The present invention also provides a luggage tag to which a heat-sensitive recording material capable of highly sensitive printing is applied.

<Means for Solving Problems> The present invention is, as shown in FIG. 1, a thermosensitive coloring mainly composed of a colorless or light-colored leuco dye and a color developer on a support 1 made of a polyolefin cross-laminated film. Layer 2
And a protective layer 3 are sequentially provided, and a release paper 5 is attached to the back surface of the support 1 via an adhesive layer 4, and the present invention further includes the above-mentioned luggage tag as shown in FIG. It is a luggage tag in which an under layer 6 containing a film-forming polymer as a main component is provided between the support 1 and the thermosensitive coloring layer 2 constituting the.

The components of the present invention will be described in detail below.

The polyolefin-based cross-laminated film, which is the support for the tag of the present invention, is manufactured by laminating two films oriented in a direction of 45 degrees with respect to the flow direction so that they cross each other in the lamination process. A polyolefin resin is used for the intermediate adhesive layer and is laminated. Its characteristic is a material with little mechanical anisotropy, which is improved by cross laminating processing to reduce the tear strength of the film in the orientation direction while maintaining the flexibility and strength of the polyolefin film. The preferred thickness of the tag of the present invention as a support is about 50 to 100 μm, which is characterized in that sufficient strength can be obtained with a relatively thin film thickness.

Further, the surface of the support used in the present invention is preferably subjected to corona treatment in order to improve the adhesiveness which is a drawback of the polyolefin film.

Next, the under layer constituting the tag of the present invention is a layer provided for the purpose of improving the adhesiveness between the support and the thermosensitive coloring layer, and improving the recording sensitivity and the printing accuracy.

The hydrophobic polymer in the under layer is considered to effectively act to prevent the thermal energy transferred to the thermosensitive coloring layer from diffusing to the side of the cross-laminated film that is the support, and further improves the recording sensitivity. This is effective in improving printing accuracy.
Examples of the hydrophobic polymer of the present invention include at least one of SBR, styrene-acrylic acid ester copolymer and styrene-methacrylic acid ester copolymer. For the hydrophobic polymer, it is possible to use an organic solvent-soluble resin, but since the residual organic solvent has an effect such as causing background fog in the thermosensitive color developing layer, it is in the form of an aqueous latex or emulsion. It is preferable to use.

If necessary, a pigment may be added to the under layer constituting the present invention.

Inorganic and organic pigments, such as heavy and soft calcium carbonate, are optionally added to the under layer.
Examples thereof include aluminum hydroxide, titanium oxide, zinc oxide, barium sulfate, talc, clay, satin white, kaolinite, polyolefin particles, polystyrene particles and urea-formalin resin particles. The weight mixing ratio of the hydrophobic polymer and the pigment in the under layer is 10: 0.
In the range of 1: 9, preferably 10: 0 to 3: 7 is desirable in terms of recording characteristics. The thickness of the under layer is 1 μm or more, preferably 3 μm or more in view of recording characteristics.

The heat-sensitive color-developing layer of the tag according to the present invention contains a colorless or light-colored leuco dye and a color developer for coloring the leuco dye as main components. Typical leuco dyes used are crystal violet lactone, 3-
Diethylamino-7-chlorofluorane, 3-diethylamino-6-methyl-7-chlorofluorane, 3-cyclohexylamino-6-chlorofluorane, 3-diethylamino-7-dibenzylaminofluorane, 3-pyrrolidino-6 -Methyl-7-anilinofluorane, 3-piperidino-6-methyl-7-anilinofluorane, 3-
Cyclohexylmethylamino-6-methyl-7-anilinofluorane, 3-ethylisoamylamino-6-methyl-7-anilinofluorane, 3-diethylamino-7
Examples thereof include, but are not limited to,-(o-chloroanilino) fluorane and 3-dibutylamino-7- (o-chloroanilino) fluorane.

Further, as a color developer which reacts with the leuco dye to develop a color, α-naphthol, β-naphthol, 4-t-butylphenol, 4-t-octylphenol, 4-phenylphenol, 2.2-bis (p-hydroxyphenyl) ) Propane, 2.2-bis (p-hydroxyphenyl)
Butane, 4.4'-cyclohexylidene diphenol, 2.2
-Bis (2.5-dibromo-4-hydroxyphenyl) propane, 4.4'-isopropylidene bis (2-t-butylphenol), 2.2'-methylenebis (4-chlorophenol), 4.4'-sulfonyldiphenol, 4.4'-
There are derivatives such as thiobisphenol, benzoic acid, salicylic acid, and gallic acid, but not limited to these.

Further, in the present invention, in order to improve the recording sensitivity,
If necessary, various heat-fusible substances can be added to the thermosensitive coloring layer. Examples of the heat-fusible substance include organic compounds having an appropriate melting point. Examples thereof include higher fatty acid amides such as stearic acid amide, animal waxes such as beeswax and shellac wax, vegetable waxes such as carnauba wax, and montan wax. Waxes such as mineral wax, paraffin wax, microcrystalline wax, higher fatty acid, higher fatty acid ester, aromatic carboxylic acid esters such as dimethyl terephthalate, diphenyl phthalate, alkylnaphthalene derivative, alkyldiphenyl derivative, alkylterphenyl derivative Etc. are used.

The leuco dye, the developer and the heat-fusible substance optionally added are pulverized by a media-type wet disperser to prepare a dispersion liquid.
It is 5 μm or less, preferably 3 μm or less.

Furthermore, the thermosensitive coloring layer of the present invention includes inorganic and organic pigments as a filler, such as heavy and light calcium carbonate, aluminum hydroxide, titanium oxide, zinc oxide, barium sulfate, talc, clay, satin white, kaori. Knight, polyolefin particles, polystyrene particles, urea-
Formalin resin particles and the like can be added to improve the sharpness of the color image.

In addition, various kinds of surfactants, antifoaming agents, antioxidants, ultraviolet absorbers and the like are added to the heat-sensitive color forming layer as required. Examples of the binder for binding the material forming the thermosensitive coloring layer as described above include casein, gelatin, polyvinyl alcohol, polyvinylpyrrolidone, starch, modified starch, isobutylene-maleic anhydride resin, diisobutylene-maleic anhydride resin, Styrene-maleic anhydride resin, polyacrylamide, modified polyacrylamide, carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, vinyl acetate, acrylic ester, vinyl chloride-vinyl acetate copolymer, emulsions such as SBR and NBR, latex, etc. Used alone or as a mixture.

Since the protective layer that constitutes the tag of the present invention is provided for the purpose of preventing pressure coloring caused by scratches, scratches, etc. and invasion of chemicals into the thermosensitive coloring layer, it is basically a polymer binder with good film forming property. It is necessary to use the agent as the main component. As the polymer binder, a water-soluble or water-insoluble resin binder which is a material used for the thermosensitive coloring layer can be used, but for the purpose of preventing penetration of lipophilic chemicals such as plasticizers and oils. Water-soluble resins are preferred. However, since the water-soluble resin binder has poor water resistance, it can be mixed with emulsions, latexes, glyoxal, chrome amber, melamine resin, melamine formaldehyde resin, polyamide resin,
It is desirable to add a waterproofing agent such as polyamide-epichlorohydrin resin to the water-soluble resin before use. Further, various surfactants and antifoaming agents can be added as necessary.

In addition to the above-mentioned film-forming polymer binder, the protective layer may be made of an inorganic or organic pigment, zinc stearate, calcium stearate, a lubricant such as fluororesin, or the like, if necessary, in order to obtain matching with the thermal head. It is desirable to add a release agent.

The under layer, the thermosensitive coloring layer and the protective layer having the composition as described above are sequentially coated with a coating material on the surface of the support by a known coating method such as air knife coating, roll coating, bar coating and blade coating, and dried. By doing so, it is formed as a coating layer. In the luggage tag of the present invention, a back coat may be provided on the back surface of the support for the purpose of preventing curling or the like, if necessary.

The tag of the present invention is used by sticking each layer of the above-mentioned thermosensitive coloring layer and protective layer and, if necessary, an adhesive layer and release paper on the side opposite to the surface coated with the under layer. As the pressure-sensitive adhesive used in the pressure-sensitive adhesive layer, a polyacrylic acid ester-based pressure-sensitive adhesive which is generally known as a pressure-sensitive adhesive is applied.

FIG. 3 shows a state in which the tag of the present invention obtained as described above is used for an actual airline tag. That is, the thermosensitive coloring image 10 and the barcode image are previously formed on the surface of the tag 7.
11, the release paper is peeled off, and the exposed adhesive layer is adhered at the adhering portion 8 where it is adhered, and is held by a handle 9 such as a bag.

<Examples> Next, the present invention will be described in detail with reference to Examples and Comparative Examples. All parts in the examples and comparative examples represent parts by weight.

(Example 1) Corona-treated polyolefin cross-laminated film with a thickness of 75 μm (Sunlex Industry Co., Ltd.) as a support
Manufactured by KM film 750W) and has a solid content sensitivity of 50%
Styrene butadiene latex was applied so as to have a dry weight of 4 g / m ² to form an under layer.

Next, in order to prepare a coating material for the thermosensitive coloring layer, a mixture having the following composition is dispersed using a sand mill to prepare a dispersion liquid [A] to
[C] was adjusted.

Using the dispersions of [A] to [C] obtained as described above, a thermosensitive color developing layer coating material having the following composition was prepared and coated on the under layer to a dry weight of 7 g / m ² A color forming layer was formed.

Further, a coating material having the following composition was prepared as a protective layer and applied on the thermosensitive color developing layer so that the dry weight was 4 g / m ² .

On the back surface of the support on which the under layer, the thermosensitive coloring layer and the protective layer were formed, a polyacrylic ester emulsion adhesive was used and bonded to a release paper treated with silicon to obtain a luggage tag of the present invention.

Example 2 Using the cross-laminated film subjected to the corona discharge treatment of Example 1, 100 parts by weight of a 40% by weight solid content emulsion of styrene-acrylic acid ester copolymer was added with 30% by weight.
Example 1 except that 50 parts of an aqueous dispersion of titanium oxide of was added and coated so as to have a dry weight of 6 g / m ² to form an under layer.
The tag of the present invention was obtained in the same manner as.

(Example 3) A luggage tag of the present invention was obtained in the same manner as in Example 1 except that the cross-laminated film of Example 1 was used as a support and the under layer was not coated.

(Comparative Example 1) Example 1 except that 150 μm high-quality paper was used as the support.
I obtained a tag for comparison in the same manner as.

(Comparative Example 2) A luggage tag for comparison was obtained in the same manner as in Example 1 except that a 100 μm milky-white polyethylene terephthalate film was used as the support.

(Comparative Example 3) A paper support having a thickness of 50 µm was used as a support, an underlayer, a thermosensitive coloring layer and a protective layer were formed in the same manner as in Example 1, and then laminated with a 100 µm opalescent polyethylene terephthalate film, and further on the back surface. Using a polyacrylic acid ester-based emulsion pressure-sensitive adhesive, it was attached to a silicone-treated release paper to obtain a tag for comparison.

The tags of the above-mentioned examples and comparative examples were printed with a thermal printing device manufactured by Matsushita Electronic Components Co., Ltd. at an applied power of 0.5 W / dot and a pulse width of 1.0 msec, and the print density was measured with a Macbeth reflection densitometer RD-914. Then, the recording density was evaluated. In addition, barcode printing was performed using a thermal barcode printer manufactured by Antonson Avery Co., and the barcode accuracy was visually determined.

Further, with respect to the luggage tags of Examples and Comparative Examples before the back surface was subjected to adhesive processing, the tear strength was measured with an Elmendorf type tear tester based on JIS P-8116 to evaluate the mechanical strength.

The results are shown in Table 1.

As is clear from Table 1, the tag of the present invention has a high mechanical strength represented by tear strength, is not only suitable as a tag for airlines, etc., but also has a high recording sensitivity in terms of heat-sensitive recording characteristics. It was also excellent in sharpness.

(Effect of the device) Since the tag of the present invention uses the polyolefin laminate film as the support, the tear strength from random directions, especially the tear strength from the scratched part on the edge of the tag is excellent, and thus the airline. It has sufficient physical strength for the tags such as.

[Brief description of drawings]

1 and 2 are explanatory views showing the layer structure of the tag of the present invention,
FIG. 3 is a view showing a state in which the tag of the present invention is used as an airline tag. 1 ... Cross-laminated film support 2 ... Thermosensitive coloring layer 3 ... Protective layer 4 ... Adhesive layer 5 ... Release paper 6 ... Underlayer 7 ... Tag 8 ... Adhesive part 9 ... Bag etc. Handle 10 …… Sensitive color image 11 …… Bar code image

Claims (2)

[Scope of utility model registration request] 1. A thermosensitive coloring layer containing a colorless or pale leuco dye and a developer as a main component and a protective layer are sequentially provided on a support made of a polyolefin cross-laminated film,
A tag which is characterized in that a release paper is attached to the back surface of the support through an adhesive layer. 2. An under layer containing a film-forming polymer as a main component, a thermosensitive coloring layer containing a colorless or light-colored leuco dye and a developer as a main component, and a protective layer on a support made of a polyolefin-based cross-laminated film. And a release paper attached to the back surface of the support through an adhesive layer.