JP2002311874A - Label for car body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new label for a car body which hardly deteriorates even when the label is exposed to outdoor UV rays, which is excellent in the durability against the collision of dust or pebbles on a road because of the high surface hardness, and which hardly causes the deposition of dust because no electrostatic charge is produced on the label surface, to provide a label for a car body which is environmentally friendly without producing a toxic component or allowing the component to flow when the label is discarded or incinerated, and to provide a label for a car body which can rapidly response to the demand for the advertisement renewed in a short period and which can be provided at a low cost even for the order of a rather small lot. SOLUTION: The label displays the information on company names, advertisement or the like and is used by sticking to the outer surface of a car body 2. The label 1 for a car body has a pressure-sensitive adhesive layer 10, a polyolefin layer 20 formed on the pressure-sensitive adhesive layer 10, a printing layer 30 formed by on-demand printing on the polyolefin layer 20, and a transparent ceramic layer 40 formed on the printing layer 30. The transparent ceramic layer 40 preferably contains an adsorbent for UV rays.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a label.
More specifically, the present invention relates to a vehicle body label which is used by being attached to the surface of a vehicle body to display a company name, an advertisement, and the like.

[0002]

2. Description of the Related Art Conventionally, with respect to various vehicles such as trucks and tank trucks, various information such as a company name, an advertisement, or a name of a product / service is widely displayed on a side surface of the vehicle body. Recently, local governments have started to display advertisements on the side of public buses in order to earn advertising revenue. As such a conventional technique for displaying information such as advertisements on the body surface, a label printed with an advertisement or the like is attached to the body surface, and a vinyl chloride film is used for beautification and protection of the label surface. Lamination (pressure bonding) has been commonly performed.

In the above prior art, since the surface is made of a resin film, the surface generally absorbs in the ultraviolet region of 290 to 350 nm. There was a problem of dripping and sunburn. In addition, the printed layer also has a problem of discoloration and fading due to the influence of sunlight, oxygen in the air, and moisture.

[0004] Further, the resin film has insufficient surface hardness, so that dust generated by running of the vehicle,
The impact of pebbles or the like may damage or wear the surface, resulting in loss of sharpness of printed advertisements and the like.

[0005] Further, since static electricity is easily generated on the surface of the resin film, dust in the air adheres and the surface is easily stained. By the way, in the technical field of paint,
Organic coatings containing an antibacterial component such as a metal oxide with respect to a vehicle containing a resin as a main component are known. However, as shown in FIG.
The antimicrobial component 92 is concealed by the vehicle 91 and the coating film 9
Since the antimicrobial component 92 was buried inside, the antibacterial component 92 could not be activated, so that the antifouling effect was not exhibited or was insufficient.

[0006] In addition, since the conventional label has a surface on which a film made of polyvinyl chloride is laminated, there is a possibility that dioxin is generated by incineration. Inks used for printing often contain toxic lead, which is a factor that deteriorates the environment.

Further, the period in which one advertisement is used is as short as several months at most, and the number of vehicles displaying the advertisement is often several tens to several hundreds. When making and printing plates each time, there is a drawback that it takes time and costs. Therefore, there has been a demand for the development of a technology capable of promptly responding to the demand for advertisements that are updated daily, and of being able to provide even a small number of requests at low cost.

[0008]

In view of the above situation, the present invention does not deteriorate even when exposed to outdoor ultraviolet light for a long period of time, and has a high surface hardness. Another object of the present invention is to provide a novel car body label having excellent durability against pebbles and the like. Further, the present invention provides a novel label for a car body, which does not generate static electricity on the label surface, so that dust does not easily adhere thereto, and which exhibits an excellent antifouling effect and can maintain the appearance of advertisements and the like.

Another object of the present invention is to provide an environmentally friendly label for a vehicle body which does not generate or leak toxic components when the label is discarded or incinerated.

Further, the present invention provides a vehicle body label which can quickly respond to the demand for advertisement updated in a short period of time and can be manufactured at a low cost even with a relatively small number of orders.

[0011]

According to a first aspect of the present invention, there is provided a label for displaying information such as a company name and an advertisement and attached to an outer surface of a vehicle body. An adhesive layer, a polyolefin layer provided on the adhesive layer, a print layer provided on the polyolefin layer, and a car body label including a transparent ceramic layer provided on the print layer. Features.

According to the above construction, there is provided a vehicle body label in which various kinds of information are printed on a polyolefin base material and the surface is protected by a transparent ceramic layer. Here, the information to be printed includes characters and pictures that are recognized by human vision, and specifically includes names of goods and services, patterns for decoration, etc. in addition to company names and advertisements. . The transparent ceramic layer is not deteriorated by ultraviolet rays, and is hard to be scratched due to its high surface hardness.Furthermore, since the surface does not generate static electricity and does not adhere to dust, the appearance of the printed layer is maintained for a long time. You. Further, no harmful components are discharged when the label is incinerated as a whole.

According to a second aspect of the present invention, in the vehicle body label according to the first aspect, the transparent ceramic layer is formed by a sol-gel method.

According to the above arrangement, a dense ceramic film is formed on the surface of the label by the sol-gel method.
The curing conditions of the ceramic in the sol-gel method are as follows:
Since the printing is performed at room temperature or at a temperature near the room temperature, a situation in which the printing layer and the polyolefin layer are decomposed or melted does not occur.

According to a third aspect of the present invention, in the vehicle body label according to the second aspect, the transparent ceramic layer is cured while penetrating the printing layer or the polyolefin layer.

According to the above configuration, the transparent ceramic layer is
By curing together with the printing layer or polyolefin layer formed below the layer, defects such as cracks are not generated on the surface, and the durability of the label is improved.

According to a fourth aspect of the present invention, in the vehicle body label according to the second or third aspect, the transparent ceramic layer contains an ultraviolet absorbent.

According to the above construction, the ultraviolet absorber absorbs ultraviolet light of 290 to 380 nm, which is most liable to deteriorate the print layer, and converts it into heat energy.
Fading is prevented. In addition, since the transparent ceramic layer itself is not easily embrittled, the ultraviolet absorber exists in the transparent ceramic layer for a long period of time (not lost from the transparent ceramic layer), and the effect is highly persistent.

According to a fifth aspect of the present invention, in the label for a vehicle body according to the fourth aspect, the content ratio of the ultraviolet absorbent is 1 to 3% by weight based on the entire transparent ceramic layer.

According to the above configuration, the content of the ultraviolet absorber is optimized from the viewpoint of maintaining the surface hardness of the transparent ceramic layer.

According to a sixth aspect of the present invention, in the vehicle body label according to any one of the second to fifth aspects, the transparent ceramic layer comprises:
It is characterized by containing an antibacterial component consisting of a metal salt.

According to the above configuration, the antibacterial component composed of the metal salt is exposed to the surface while being surely supported by the ceramic layer, so that the metal salt is easily ionized and a strong antibacterial action is exhibited.

According to a seventh aspect of the present invention, in the vehicle body label according to any one of the first to sixth aspects, the thickness of the transparent ceramic layer is 5.0 to 40.0 μm.

According to the above configuration, the thickness of the transparent ceramic layer is optimized from the viewpoint of protecting the surface of the label.

[0025] According to an eighth aspect, in the vehicle body label according to any one of the first to seventh aspects, the printing layer is formed by on-demand printing without plate making.

According to the above construction, since the printing layer of the car body label is formed by so-called on-demand printing which does not require a plate, such as ink jet printing, it can quickly respond to a relatively small amount of demand. Can be.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
First, as shown in FIG. 1, the vehicle body label 1 of the present invention comprises:
A schematic configuration including an adhesive layer 10, a polyolefin layer 20 provided on the adhesive layer 10, a printing layer 30 provided on the polyolefin layer 20, and a transparent ceramic layer 40 provided on the printing layer 30. Have been. The vehicle body label 1 is used by sticking it to the surface of a vehicle body 2 such as a truck via an adhesive layer 10.

The polyolefin layer 20 is composed of a polyolefin-based film (sheet). Specific examples of polyolefins include polyethylene, polypropylene,
Examples include homopolymers or copolymers such as polymethylpentene, and ethylene-vinyl acetate copolymers, ethylene-ethyl acrylate copolymers, and terpolymers of ethylene-propylene-dienes are also applicable. is there. Further, the polyolefin layer 20 is formed as shown in FIG.
As shown in FIG.
It is not necessary to be transparent when it is formed to have the same width as the above, but it is preferable to use a transparent one when it is formed wider than the print layer 30 and the transparent ceramic layer 40. Furthermore, the thickness of the polyolefin layer 20 is not particularly limited, but if it is too thick, it loses flexibility and it becomes difficult to follow a curved surface such as a tank lorry. Therefore, it is set appropriately in consideration of the above.

The adhesive layer 10 is provided on one surface of the polyolefin layer 20. The pressure-sensitive adhesive layer 10 is appropriately selected from conventionally known pressure-sensitive adhesives in consideration of the type of material (iron, aluminum, or the like) of the vehicle body 2 to which the vehicle body label 1 is used. Specific examples of the pressure-sensitive adhesive include an acrylic pressure-sensitive adhesive such as an acrylate copolymer. The adhesive strength of the pressure-sensitive adhesive layer 10 needs to be such that the label 1 does not peel off when the vehicle body label 1 of the present invention is run with the label attached to the vehicle body 2.
The value according to Z-0237 is 4500 mN / 25 mm or more. In addition, before the label 1 for a vehicle body of the present invention is used for the vehicle body 2, the pressure-sensitive adhesive layer 10 can be provided with a release paper. A general release paper can be used,
For example, laminating polyethylene on both sides of high quality paper,
Examples thereof include those subjected to a release treatment with silicone or the like.

Next, a printing layer 30 is formed on the polyolefin layer 20. In forming the printing layer 30, a receiving layer can be formed in advance on the polyolefin layer 20. The receiving layer is formed to improve the ink absorbency of the printing layer 30. Specific examples of the substance constituting the receiving layer include a modified urethane resin and a benzotriazole derivative.

The print layer 30 includes a company name, an advertisement, a product,
Various information such as service names and patterns for decoration are printed. The print layer 30 is preferably formed by on-demand printing without plate making. On-demand printing is a method in which digital information on a computer is sent to a printer to perform printing, and examples thereof include inkjet printing and laser printing. Among them, inkjet printing is most preferably used from the viewpoint of cost and the like. On-demand printing does not require a plate, and can be printed from one sheet. Therefore, it is easy to deal with frequently updated advertisements and the like, and it is possible to provide even a small amount of demand at low cost. Note that it is preferable to use non-polluting ink that does not contain lead or the like as the ink used for inkjet printing or the like. This eliminates the emission of harmful substances when the entire body label 1 is discarded or incinerated, so that an environmentally friendly body label 1 can be obtained.

Next, the transparent ceramic layer 40 is made of silica,
It is made of various ceramic materials such as alumina and is formed transparent. Here, “transparent” means that the printing layer 3
There is no problem in visually recognizing the information of 0, which usually means colorless and transparent. Since the transparent ceramic layer 40 transmits the ultraviolet rays without absorbing them, the surface is not deteriorated or tanned. In addition, since it has a high surface hardness, it can withstand the impact of dust, pebbles, and the like while the vehicle is running, and the printed layer 3
0 can be maintained. In addition, no static electricity is generated on the surface of the transparent ceramic layer 40 and dust is not attracted, so that the surface can be prevented from being stained.

Further, when the transparent ceramic layer 40 is incinerated, it is converted into a substance which can be reduced to the ground without discharging harmful substances such as dioxin from a conventional PVC film. Therefore, the vehicle body label 1 of the present invention does not adversely affect the environment as a whole.
It becomes an ecological label.

The transparent ceramic layer 40 is preferably formed by a sol-gel method. The sol-gel method is a method of forming a ceramic by curing a solution through a sol and a gel state, and is basically performed by the following procedure. That is, a solution obtained by adding water and a catalyst (acid or alkali) to an alcohol solution of a metal alkoxide is used as a coating solution, and this coating solution is applied on the printing layer 30 at room temperature or in the vicinity thereof, ideally at 20 ° C. Thus, hydrolysis and polycondensation of the metal alkoxide are performed and cured to form a ceramic.
By employing such a sol-gel method, a more dense ceramic layer can be formed. Also,
The temperature condition at the time of curing is at or near room temperature, and the ceramic can be formed at a relatively low temperature, so that the printing layer 30 and the polyolefin layer 20 are not damaged.

In the above-mentioned coating liquid, in addition to the above-mentioned raw materials, a gelling inhibitor such as alumina sol, silicon dioxide,
A filler such as titanium oxide, aluminum oxide, or zirconium oxide, or a substance such as a metal salt as described later can be added as appropriate.

When applying the above coating liquid on the printing layer 30, it is preferable to apply it by spraying. The transparent ceramic layer 40 can be formed uniformly and efficiently by spray coating. In addition, although the application amount at the time of spray application differs according to the concentration of the coating liquid and the curing conditions, it is 30 to 100 g / m per application.
^{About 2} is appropriate, and the coating operation can be repeated several times.

If the thickness of the transparent ceramic layer 40 is too thin, the effect of protecting the label surface becomes insufficient, which is inappropriate. On the other hand, if the thickness is too thick, the flexibility of the entire label deteriorates. It is set appropriately in consideration of the situation. Specifically, it is preferably from 5.0 to 40.0 μm.
5 to 35 μm.

Further, the transparent ceramic layer 40 is formed on the printing layer 3.
It is preferable that the resin be cured integrally in the state where it has penetrated into the polyolefin layer 20 (including the receiving layer). When each layer is formed independently via a boundary, cracks or peeling may occur on the surface of the transparent ceramic layer due to the influence of internal stress or the like, and the deterioration of the label may be accelerated.
Therefore, by integrally curing the transparent ceramic layer 40 in a state where it penetrates into the lower layer, the adhesion between the layers is increased, the whole becomes flexible, and cracks and the like are reliably prevented. In particular, when the vehicle body label of the present invention is attached to a curved surface such as a tank lorry, it is important to prevent cracks.

As described above, in order to cure the transparent ceramic layer 40 while penetrating the lower layer, various methods can be used as appropriate. For example, a solvent having a dissolving power such as IPA (isopropyl alcohol) is used as a solvent for the coating agent, and the coating agent is applied to swell the printing layer and the polyolefin layer so that the coating agent penetrates into the lower layer, preferably at room temperature. For several days.

Further, the transparent ceramic layer 40 can contain an antibacterial component composed of a metal salt. As applicable metal salts, for example, silver nitrate, copper nitrate, zinc nitrate,
Metal salts such as silver sulfate, copper sulfate, and zinc sulfate are exemplified. The antibacterial component is ionized by moisture in the air and
The antifouling effect is exhibited, and the aesthetic appearance of the printed layer 30 visually recognized from the outside can be maintained for a long time. At that time, as shown in FIG. 1, the antibacterial component 401 is supported by the transparent ceramic layer 40 and is exposed on the surface.

Further, the transparent ceramic layer 40 can contain an ultraviolet absorber. By containing an ultraviolet absorber, ultraviolet rays of 290 nm to 380 nm are absorbed and deterioration of the printed layer is prevented, so that information such as advertisements can be maintained in a clear state for a long time.

As an ultraviolet absorber, any substance which has good compatibility with ceramic and hardly causes migration can be used.
It can be appropriately selected from various substances and used.
When the absorption edge of the ultraviolet absorbent is around 420 nm, the transparent ceramic may be colored yellow, and the color of the printed layer may be impaired. Therefore, the absorption wavelength is preferably 400 nm or less. Specific examples include benzotriazole-based, benzophenone-based, oxalic acid anilide-based, cyanoacrylate-based, and triazine-based ultraviolet absorbers. Further, as the benzotriazole-based ultraviolet absorber, 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- (2′-hydroxy-
3'-tert-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-4'-n-octyloxyphenyl) benzotriazole, and the like. As the agent, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2,2′-dihydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-2′-carboxybenzophenone, 2-hydroxy- 4-n-octyloxybenzophenone, 2-hydroxy-4-n-octadecyloxybenzophenone and the like can be mentioned.

When the above-mentioned ultraviolet absorber is contained, if the content thereof is too large, the surface hardness of the transparent ceramic layer may be reduced. Specifically, 1 to 5 wt% is suitable for the entire transparent ceramic layer, preferably 1 to 3 wt%.
It is.

The vehicle body label 1 of the present invention as described above is used, for example, in a state as shown in FIG. FIG. 2 shows an example in which a vehicle body label 1 of the present invention is attached to a vehicle body 2 of a tank truck 3. In FIG. 2, the boundary line at the end of the vehicle body label 1 is drawn for convenience, but practically, when the vehicle body label 1 is formed transparent, it is hardly visually recognized. Further, the polyolefin layer and the printing layer may be formed to have the same width, that is, only the character portion and the pattern portion in FIG. 2 may be labels.

[0045]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto. (Example 1) First, an acrylic pressure-sensitive adhesive was applied to one surface of a special polyolefin film (thickness: about 175 µm). With the release paper attached, ink jet printing was performed on the surface of the polyolefin film opposite to the surface to which the adhesive was applied. The release paper used was a high-quality paper laminated with double-sided polyethylene, coated with silicone and subjected to a release treatment. Further, a receiving layer is formed on the printing surface.

Next, a ceramic coating agent was spray-coated on the print layer formed by ink-jet printing. The components of the coating agent are as follows. (1) Organoalkoxysilane 10 to 30 wt% (2) Isopropyl alcohol 10 to 30 wt% (3) Alumina sol 15 to 35 wt% (4) Silver nitrate 0.5 to 5.0 wt% (5) Acetic acid 0.05 to 0.5 wt% % (6) Silicon dioxide 20 to 40 wt% (7) Titanium dioxide 1 to 15 wt% (total 100 wt%) Here, the alumina sol prevents rapid gelation of the coating agent, and adheres to the ceramic layer, heat resistance, and reduces static electricity. It is a substance that improves antistatic properties and plays a role in supplying water in a sol as needed for hydrolysis. Further, by adding alumina sol, a fine and porous ceramic layer is formed, and antibacterial properties and deodorizing properties can be obtained.

In preparing a coating solution from each of the above substances, first, a diluted solution of alumina sol, isopropyl alcohol, acetic acid, and silver nitrate is added, and the mixture is slowly stirred for 3 to 5 minutes. Stirring was performed for 10 minutes. Since the solution generates heat due to the stirring, the temperature of the solution becomes 60 to 10 minutes after the start of the heat generation.
When the temperature reached 80 ° C., stirring was carried out slowly while cooling with water. Next, after a lapse of 2 hours, when the temperature of the solution returned to room temperature, silicon dioxide and titanium dioxide were added, and the mixture was stirred for 60 minutes or more at a high speed with an electric stirrer to obtain a target coating solution.

In spraying, 2
In an atmosphere of 0 ° C, 30 to 100 g /
m ² of the coating solution was applied, and the operation was repeated two or three times, followed by drying at 20 ° C. for 24 hours.
A transparent ceramic layer having a thickness of about μm was formed to obtain a target label for a vehicle body.

When the obtained car body label was attached to the side surface of the tank lorry and the vehicle was run for three months in winter, no deterioration or scratches were observed on the surface, and the printed layer was almost the same as when the label was attached. It was clearly visible without any.

Next, after embedding and fixing the obtained car body label with an adhesive, it is cut with a microtome, and the cross section is optical microscope (Olympus Optical Industry, BHSM), scanning electron microscope (SEM) (Hitachi, Ltd.) , S-4500). The cross section of the state before the formation of the transparent ceramic layer (polyolefin layer + printing layer) was also observed. As a result, before the formation of the transparent ceramic layer, some voids were found in the receiving layer, but in the final car body label, the transparent ceramic layer penetrated to the receiving layer and hardened integrally. As a result, no void was found in the receiving layer. This suggested that the adhesion between the layers was improved.

Example 2 A car body label was obtained in the same manner as in Example 1 except that the coating agent contained an ultraviolet absorber. Note that the content of the ultraviolet absorber was set so as to be 3 wt% with respect to the entire transparent ceramic layer after curing. Next, regarding the obtained vehicle body label, U
A V exposure test was performed. As the test apparatus, an I-Super UV tester (Iwasaki Electric, SUV series) was used. This device is a cycle tester that repeats light irradiation and dew condensation, and is capable of performing an acceleration test similar to natural exposure (acceleration magnification is 10 times or more of a weather meter). The test conditions are as follows. Irradiation wavelength; 295-450 nm UV intensity; 100 mW / cm ² cycle; UV irradiation 4 hr (black panel, 63 ° C., humidity 50%) Condensation 4 hr

As a result of the test, after 160 hours, no deterioration of the coating film and no fading or discoloration of the printed layer were observed, and it was clear that the weather resistance was excellent.

[0053]

As described above, the car body label of the present invention is used by being adhered to a car body, does not deteriorate even when exposed to outdoor ultraviolet rays for a long period of time, and has a high surface hardness. Also has excellent durability against collisions. further,
Since no static electricity is generated on the surface of the label, there is an effect that dust hardly adheres. In addition, by including an ultraviolet absorber in the transparent ceramic layer, weather resistance is improved, and information such as advertisements is maintained in a clear state for a long time.

Further, by including the antibacterial component in the transparent ceramic layer, the antibacterial component is exposed on the surface, and an excellent antifouling effect can be exhibited.

Further, in the present invention, since a polyolefin is used for the base material and a ceramic layer is used for the surface, no toxic components are generated even if the entire label is incinerated, and an environmentally friendly label can be obtained. it can.

Furthermore, in forming the printing layer, on-demand printing without using a plate, such as ink-jet printing, is adopted, so that it is easy to respond to a relatively small number of demands, and labels can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a diagram showing a cross section of a vehicle body label of the present invention.

FIG. 2 is a view showing an example of use of the vehicle body label of the present invention.

FIG. 3 is a view showing a coating film formed by a conventional paint containing an antibacterial component.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body label 2 Body 3 Tank lorry 10 Adhesive layer 20 Polyolefin layer 30 Printing layer 40 Transparent ceramic layer 401 Antibacterial component 8 Coating object 9 Coating film 91 Vehicle 92 Antibacterial component

Claims (8)

[Claims] 1. A label on which information such as a company name and an advertisement is displayed and which is used by being attached to an outer surface of a vehicle body, comprising: an adhesive layer; a polyolefin layer provided on the adhesive layer; A car body label comprising: a printed layer provided on a layer; and a transparent ceramic layer provided on the printed layer. 2. The vehicle body label according to claim 1, wherein
The label for a vehicle body, wherein the transparent ceramic layer is formed by a sol-gel method. 3. The vehicle body label according to claim 2, wherein
A label for a vehicle body, wherein the transparent ceramic layer is cured while penetrating the printing layer or the polyolefin layer. 4. The label for a vehicle body according to claim 2, wherein the transparent ceramic layer contains an ultraviolet absorbent. 5. The vehicle body label according to claim 4, wherein
A label for a vehicle body, wherein the content of the ultraviolet absorbent is 1 to 3 wt% with respect to the entire transparent ceramic layer. 6. The car body label according to claim 2, wherein the transparent ceramic layer contains an antibacterial component comprising a metal salt. 7. The label for a vehicle body according to claim 1, wherein the thickness of the transparent ceramic layer is 5.0-4.
A label for a vehicle body, which is 0.0 μm. 8. The label for a vehicle body according to claim 1, wherein the printing layer is formed by on-demand printing without plate making.