JP2001011403A - Pressure-sensitive adhesive tape for coating and coating method using pressure-sensitive adhesive tape for coating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive tape for coating, a preparing process for the pressure-sensitive adhesive tape and a coating method using the pressure-sensitive adhesive tape for coating, which are capable of carrying out a coating with a simplified process, of sticking easily to a part with a large area or to a curved surface such as a corner, and furthermore of permitting many kinds and variety of the coatings with an excellence in color reproducibility. SOLUTION: A pressure-sensitive adhesive tape for coating has a pressure- sensitive adhesive layer 3, a coating film 4 made of a coating provided on a surface of the pressure-sensitive adhesive layer 3 and a masking application tape 5 provided on the surface side opposite to the surface laminated with the pressure-sensitive adhesive layer 3 on the coating film 4. The coating film 4 is provided by a spray coating and has a dry film thickness of preferably 1-20 μm. And also the pressure-sensitive adhesive layer 3 is preferably made of a pressure-sensitive adhesive having the main component of an acrylic resin or containing both an acrylic resin and a phenolic resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive tape for coating, particularly to a pressure-sensitive adhesive tape used for coating vehicles such as automobiles, a method for producing a pressure-sensitive adhesive tape for coating, and a method for coating using a pressure-sensitive adhesive tape for coating. It is.

[0002]

2. Description of the Related Art Generally, door parts, hoods, fenders, roof parts of so-called RV (recreational vehicle) vehicles, or side covers of motorcycles,
In some cases, two-tone paint is applied to the outer surface of a vehicle component such as a fuel tank as an accent or to improve aesthetics and luxury.

[0003] By the way, the conventional two-tone color coating is as follows.
For example, it has been performed by spray coating in which a coating material is sprayed on the surface of a substrate to be coated which has been subjected to pretreatment such as undercoating. However, according to the spray coating, since a paint spraying and drying process is required for each color, a long time is required for the entire coating process,
There was a problem that production efficiency was reduced. Further, the volatile organic solvent is released into the atmosphere every time the paint is sprayed, which is not preferable in terms of environmental health.

[0004] In order to solve such a problem, for example, there has been proposed a method of imparting color by attaching a colored film for coating to the surface of a substrate to be coated. Examples of the coating colored film include, for example, a coating colored film formed by mixing a paint or a color pigment with a resin material constituting the film and forming the film by a casting method or the like, or an adhesive made of an adhesive containing a color pigment or the like. A structure provided with a layer has been proposed.

[0005] However, in such a colored film for coating, since the color pigments and the like are dispersed in the constituent materials of the film and the adhesive, the color developability and reproducibility are not sufficient. In some cases, color unevenness, streaks, etc. were developed and the commercial value was significantly impaired. Furthermore, in order to maintain the concealment of the base, it was necessary to provide these colored film layers and colored pressure-sensitive adhesive layers thickly, so that the overall flexibility was inferior, so that they could be adhered to curved surfaces such as large areas and corners. There was a problem that the work was difficult and the work was troublesome.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a colored film for paints in order to shorten the entire coating process in the conventional two-tone color coating and reduce the emission of volatile organic solvents into the atmosphere. Adhesive tapes and coating tapes with good flexibility to follow curved surfaces without having to mix paint etc. into the resin material to be produced, especially without metallic unevenness and streaks even in metallic colors and having flexibility An object of the present invention is to provide a coating method used.

[0007]

This and other objects are achieved by the present invention which is defined below as (1) to (6).

(1) A pressure-sensitive adhesive layer, a coating film composed of a paint provided on the surface of the pressure-sensitive adhesive layer, and a coating film provided on a surface of the coating film opposite to a surface laminated on the pressure-sensitive adhesive layer. And a masking application tape.

(2) The coating adhesive tape according to the above (1), wherein the paint contains a urethane resin as a main component.

(3) The pressure-sensitive adhesive layer is made of an adhesive containing an acrylic resin and a phenolic resin.
Or the adhesive tape for coating as described in (2).

(4) The coating adhesive tape according to any one of (1) to (3), wherein a primer layer is interposed between the coating film and the masking application tape.

(5) The pressure-sensitive adhesive tape for coating according to any one of (1) to (4), further comprising a substrate between the pressure-sensitive adhesive layer and the coating film.

(6) a step of forming a first coating film by sticking the adhesive tape for coating according to any one of (1) to (5) on a part of the surface of the substrate to be coated;
A step of forming a second coating film on a portion of the surface of the substrate to be coated on which the adhesive tape for coating is not adhered, and a step of peeling off a masking application tape of the adhesive tape for coating. Painting method using adhesive tape for painting.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a coating adhesive tape of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

FIG. 1 shows a first embodiment of the coating adhesive tape of the present invention.
FIG. 2 is a cross-sectional view showing an embodiment, and FIG. 2 is a cross-sectional view showing a modification of the coating adhesive tape of the present invention. As shown in these figures, the adhesive tape for coating 1 of the present invention has an adhesive layer 3, a coating film 4 made of a paint provided on the surface of the adhesive layer 3, and an adhesive layer 3 of the coating film 4. It has a masking application tape layer 5 provided on the surface opposite to the surface on which it is laminated. Thus, since the adhesive tape for coating of the present invention has a coating film composed of the paint itself,
It has excellent color reproducibility and color developability, and can be used in place of conventional coating by spraying a coating on a substrate to be coated.

The coating adhesive tape 1 of this embodiment shown in FIG. 1 has a release sheet 2 adhered to the surface of an adhesive layer 3. Hereinafter, each item will be described in detail.

The pressure-sensitive adhesive layer 3 of the coating pressure-sensitive adhesive tape 1 can be formed from a conventionally used pressure-sensitive and heat-sensitive pressure-sensitive adhesive. Examples of the pressure-sensitive adhesive to be used include those mainly containing a resin such as natural rubber, acrylic resin, ethylene-vinyl acetate copolymer, polyurethane, polyester, silicone rubber, fluorine-based rubber and polyvinyl butyral. Among these pressure-sensitive adhesives, pressure-sensitive adhesives containing an acrylic resin as a main component are preferable in terms of heat resistance, transparency, durability, weather resistance and the like, and among others, acrylic pressure-sensitive adhesives containing an alkyl acrylate as a main component Is more preferred. Such an acrylic pressure-sensitive adhesive containing an alkyl acrylate as a main component has a small initial adhesive strength, is excellent in removability and re-stickability, easily re-attached, and has good handleability. Further, after the application, the adhesive strength is improved with time, and there is no possibility that floating, peeling or the like occurs. The adhesive strength of the adhesive is 500g / 25
mm or more, more preferably 1000 g / 25 mm or more.

It is preferable that the pressure-sensitive adhesive layer 3 is made of an adhesive. Adhesives have sufficient adhesive strength at room temperature, and have the property of causing a curing reaction upon heating to increase the adhesive strength, making it more effective in improving the suitability for application and protecting and improving the adhesion of coating films. It can be aimed at.

The adhesive constituting the pressure-sensitive adhesive layer 3 includes:
The pressure-sensitive adhesive preferably contains, for example, an epoxy resin or a thermosetting phenolic resin as a thermosetting pressure-sensitive adhesive component. Among them, a pressure-sensitive adhesive containing a thermosetting phenolic resin is more preferable from the viewpoint of adhesive strength retention. Such an adhesive has an excellent balance between shear strength and peel strength after curing, and can maintain sufficient adhesive properties even under severe heat and humidity conditions.

The adhesive strength of the adhesive before heating is 500 g / 25
mm or more is preferable. When the adhesive is heated to cause a curing reaction, the adhesive strength after heating is preferably 1000 g / 25 mm or more. Thereby, the adhesive tape 1 for coating can acquire more excellent adhesive strength. For this reason, even if it is used for a long time after sticking the pressure-sensitive adhesive tape for coating 1 of the present invention on a substrate, peeling and the like are less likely to occur.

The pressure-sensitive adhesive layer 3 may optionally contain, in addition to the above-mentioned pressure-sensitive adhesive, a pressure-sensitive adhesive imparting agent, a softening agent, an antioxidant, a stabilizer, an ultraviolet absorber and the like. Adhesive layer 3
Is not particularly limited, but is preferably about 5 to 100 μm, more preferably about 20 to 50 μm. Adhesive layer 3
If it is too thin, it may not be possible to obtain sufficient adhesive strength,
On the other hand, if the thickness is too large, the flexibility of the pressure-sensitive adhesive tape for coating 1 may be impaired, or the handleability may deteriorate, such as leaching of the pressure-sensitive adhesive.

The coating film 4 is provided by applying a paint itself. Therefore, unlike a conventional colored film for coating, which is formed into a sheet by mixing a pigment or the like into the constituent material of the film layer, or a film which is screen-printed on the film, the coating film 4 of the present invention is a paint film. Since it is composed of itself, the color reproducibility is good, and even if it is a metallic color, for example, a good coating can be applied without causing color unevenness, streaks, and the like. Further, since the coating film 4 composed of the coating material itself can be formed extremely thin, the coating adhesive tape 1
The whole can be made thin, flexible and excellent in followability, and can be easily attached to a curved surface portion such as a corner portion or a large area portion.

The paint constituting the coating film 4 is not particularly limited, and a usual paint for automobile exterior can be used.
Examples of such a paint for an exterior of an automobile include a paint mainly containing a pigment component and a resin for dispersing the pigment component. Examples of the resin used include urethane-based resins, epoxy-based resins, polyester-based resins and the like, which can be appropriately selected and combined depending on the material of the base material to be coated, but urethane-based resins are preferable. According to the paint containing a urethane-based resin as a main component, crosslinking at a relatively low temperature becomes possible, and the coating film 4 composed of the paint itself can be easily formed.

As the pigment component, general pigments including various organic pigments, inorganic pigments, natural pigments and the like are used. Among such pigments, it is particularly preferable to include a bright pigment. Thereby, a coating film giving a metallic feeling can be formed. The brilliant pigment is not particularly limited, and examples thereof include metallic pigments such as aluminum pigments, pearl pigments, and solid pigments which are generally used for automotive exterior paints. The glitter pigments may be used alone or in combination of two or more.

The shape of the glitter pigment powder is not particularly limited, but a scaly shape is preferred. According to the paint containing the scaly bright pigment, it is possible to form a coating film having an even better appearance and imparting a metallic feeling.

The dry thickness of the coating film 4 is preferably 5 to 40 μm, more preferably 7 to 20 μm. Coating film 4
If it is less than 5 μm, the color developability and metallic feeling may be insufficient, and the finish may be poor. On the other hand, if the thickness of the coating film 4 exceeds 40 μm, the flexibility, the ability to follow a curved surface, and the like are impaired, and there is a possibility that the adhesion workability may deteriorate.

The masking application tape 5 is
It mainly functions to mask the coating film 4 in advance. The masking application tape 5 is preferably one in which an adhesive layer is provided on one surface of a transparent film. This makes it possible to more clearly see the boundary of the color as compared with a case where paper or the like other than a film is used as a base material.

The transparent film constituting the masking application tape 5 is not particularly limited, and is, for example, a polyolefin film such as polyethylene, propylene or polyvinyl chloride, a film such as polyethylene terephthalate (PET), or an ethylene-vinyl acetate copolymer. And a film composed of a combination of one or more resins selected from the above, a laminate, or the like. The thickness of such a film is 30-1.
It is preferably about 00 μm. If the film is too thin, it may be broken at the time of peeling. On the other hand, if it is too thick, the flexibility may be impaired and the suitability for sticking may be reduced.

The adhesive layer of the masking application tape 5 includes, for example, a rubber-based adhesive, an acrylic-based adhesive, and the like. However, in terms of heat resistance, transparency, durability, weather resistance, etc. What consists of a system adhesive is preferable. The thickness of the pressure-sensitive adhesive layer of the masking application tape 5 is preferably about 10 to 30 μm.

The adhesive strength of the adhesive constituting the adhesive layer of the masking application tape 5 is preferably smaller than the adhesive strength of the adhesive layer 3 of the coating adhesive tape 1 of the present invention. Specific adhesive strength is 1000g / 25mm
The following is preferable, and about 100 to 500 g / 25 mm is more preferable. Thereby, the masking application tape 5 can be more appropriately peeled when the coating adhesive tape 1 is used.

If necessary, the adhesive tape for coating 1 of the present invention
The release sheet 2 is adhered to the surface of the pressure-sensitive adhesive layer 3 opposite to the surface on which the coating film 4 is laminated. This prevents dust and dirt from adhering to and blocking of the pressure-sensitive adhesive layer 3 by the time of use, and can improve handling, storage, and the like.

As the release sheet 2, for example, silicon,
Examples include glassine paper, woodfree paper or film surface-treated with a release agent such as a wax or a fluororesin, or a polyethylene terephthalate (PET) film or a foamed PET film having release properties per se. It is preferable to use a smooth film having the releasability of the film or the material itself because the adhesive surface of the pressure-sensitive adhesive layer 3 becomes smooth. The thickness of the release sheet 2 is not particularly limited, but is preferably about 50 to 200 μm.

Further, as a modified example of the coating adhesive tape 1 shown in FIG. 1, a primer layer 6 may be interposed between the coating film 4 and the masking application tape 5 as shown in FIG. In the figure, the same items as those in the embodiment of FIG. 1 described above are denoted by the same reference numerals, and description thereof will be omitted. By thus providing the primer layer 6 in advance, it is possible to improve the adhesion and weather resistance between the coating film 4 and the clear coat layer provided on the coating film 4 in the finishing of the coating process. The primer layer 6 is not particularly limited. For example, at least one selected from the group consisting of an epoxy resin, an acrylic resin, an organically modified silicone resin such as an acrylic silicone resin, a urethane resin, a phenol resin, a polyester resin, and a melamine resin. A resin containing one kind of resin as a main component is exemplified, and among them, a resin containing a polyester resin as a main component is preferable. By interposing such a primer layer 6, the adhesion between the coating film 4 and the clear coat layer and the weather resistance can be further improved.

The thickness of the primer layer 6 is not particularly limited, but is preferably 0.1 to 50 μm, more preferably 0.5 to 15 μm. If the primer layer 6 is too thin, it may not be possible to improve the adhesion and weather resistance,
On the other hand, if it is too thick, the flexibility of the adhesive tape for coating may decrease. In addition, if necessary, the primer layer 6
A coloring pigment or the like may be included for toning.

Further, as a modified example of the adhesive tape for painting 1 shown in FIG. 1, a base material 7 between the adhesive layer 3 and the coating film 4 as shown in FIG. By providing the base material 7 in this manner, the coating film 4 and the pressure-sensitive adhesive layer 3 can be fixed more favorably, and workability, handleability, and the like can be improved. In addition, the resilience is improved, the impact from the outside is reduced, and the painted surface can be protected.

The substrate 7 preferably has excellent dimensional stability against changes in environmental conditions, that is, changes in temperature, humidity, etc. Further, it has flexibility (flexibility), and has good followability to a curved surface at the time of sticking. What is suitable for cutting or punching at the time of processing is preferable.

The substrate 7 is not particularly limited. For example, polyethylene terephthalate (PET)
Such as polyester, polyvinyl chloride, polypropylene (PP), polyarylate, polyurethane, polycarbonate, polyamide, triacetyl cellulose (TA
And a film composed of a resin such as C). Among these, a polyurethane film and a polyvinyl chloride film are preferred. These films are particularly excellent in durability, weather resistance, chemical resistance and the like, and have high appearance. In addition, it has excellent heat resistance and can sufficiently withstand baking under high temperature conditions in the coating process.

The thickness of the substrate 7 is preferably from 50 to 300 μm, more preferably from 50 to 200 μm. If the thickness of the base material 7 is less than 50 μm, sufficient fixation of the pressure-sensitive adhesive layer 3 and the coating film 4 may not be achieved, and workability, handleability, and the like may not be improved. On the other hand, if it exceeds 300 μm, delamination may occur, or the flexibility may be impaired, and the suitability for sticking may be reduced. The substrate 7 may be transparent or colored by itself, but is preferably transparent or milky white which does not impair the color tone of the coating film 4.

The adhesive tape for coating 1 can be used for coating vehicles such as automobiles, motorcycles and railway vehicles, as well as for painting buildings such as tanks and steel towers.
It is particularly preferably used for painting vehicles such as automobiles. By using the pressure-sensitive adhesive tape for coating of the present invention, it is possible to perform coating with excellent aesthetics in a simple process, and it is also possible to easily respond to diversification of designs, so that the commercial value of automobiles and the like Can be significantly improved.

The adhesive tape for coating 1 of the present invention, when used, preferably has a breaking strength of 600 kg / cm ² or less. Further, the adhesive tape for coating 1 of the present invention preferably has an elongation at break of 100% or more in a state of use. Thereby, the adhesive tape for coating 1 becomes excellent in flexibility, and has good followability even when affixed to a curved surface such as a large area portion or a corner portion, so that handleability and workability are improved.

Next, a method for producing the coating adhesive tape of the present invention will be described. First, a coating film 4 made of a paint is formed on a process film made of, for example, a polyester resin by a known method such as spray coating to obtain a first process product.

Next, the pressure-sensitive adhesive composition is applied on the release sheet 2 by a known method to provide the pressure-sensitive adhesive layer 3.

Then, the release sheet 2 on which the pressure-sensitive adhesive layer 3 is formed and the first step product are laminated so that the pressure-sensitive adhesive layer 3 and the coating film 4 are laminated, and the pressure-sensitive adhesive layer 3 is coated on the pressure-sensitive adhesive layer 3. A membrane 4 is provided. The process film is composed of the first process product and the release sheet 2.
Can be peeled and removed before the application tape 5 is laminated.

Next, a masking application tape 5 is manufactured. This can be produced, for example, by applying a pressure-sensitive adhesive composition to one surface of a film serving as a substrate by a known method to form a pressure-sensitive adhesive layer.

Then, the pressure-sensitive adhesive layer of the masking application tape 5 is joined to the coating film 4 and the masking application tape 5 is laminated on the coating film 4, whereby the coating adhesive tape 1 is manufactured. In addition, the adhesive layer of the masking application tape 5 is protected by a release sheet similar to the release sheet 2 in advance, and the adhesive layer of the masking application tape 5 is applied to the coating film 4 while removing the release sheet. The adhesive tape for painting 1 may be manufactured by bonding.

The method for curing and drying the pressure-sensitive adhesive layer of the pressure-sensitive adhesive layer 3, the coating film 4, and the masking application tape 5 may be a known method, and is not particularly limited. Further, the temperature at the time of curing and drying is not particularly limited, and can be appropriately set according to the type of constituent material of each layer.

A coated layer adhesive tape having a primer layer 6 or a base material 7 as shown in FIG. 2 is manufactured, for example, as follows. First, the pressure-sensitive adhesive composition is applied to one surface of the base material 7 to form the pressure-sensitive adhesive layer 3, and then the release-treated surface of the release sheet 2 is bonded. On the other hand, the coating film 4 is formed on the other surface of the substrate 7 by, for example, spray coating. Next, if necessary, a primer layer 6 is formed on the coating film 4 by a known coating method, screen printing, or the like. And it can manufacture by laminating on the primer layer 6 so that the adhesive layer side of the masking application tape 5 may join.

Next, a coating method using the coating adhesive tape of the present invention will be described. FIG. 3 is a cross-sectional view showing an example of a coating method using the coating adhesive tape of the present invention.
First, the coating adhesive tape 1 of the present invention is adhered to the surface of a substrate 10 to be coated, such as a vehicle that has been pretreated in a coating line. The adhesion of the coating adhesive tape 1 is usually performed by peeling off the release sheet 2, attaching the tape to the end of the coating surface 101 of the substrate 10 to be coated, and using a rubber roller or a squeegee to apply the adhesive to the coating surface 101. The layers 3 are successively pressed together so that no air bubbles are formed. Thereby, the first coating film 4
Is formed.

Next, a second coating film 12 is formed on the coating surface 101 of the substrate 10 to be coated and the adhesive tape for coating. The method for forming the second coating film 12 is not particularly limited, but spray coating is preferred. At this time, a two-tone coating can be performed by using a paint of a color different from that of the first coat 41 for the second coat 12.
The second surface of the masking application tape 5
It is needless to say that the coating film 12 need not be formed.

Further, before the second coating film 12 is completely dried, the masking application tape 5 is peeled off as shown in FIG. 3A. As a result, the lower first coating film 41 appears. At this time, the first coating film and the second coating film
The boundary with the coating film becomes clear. And FIG.
As shown in (2), a clear coat layer 14 is provided on the surfaces of the first coating film 41 and the second coating film 12 of the coating film 4.
The clear coat layer 14 can be formed from a general coating material for automotive exterior. Examples of the coating agent include a coating agent composed of a urethane-based resin, an acrylic melamine-based resin, etc. Among them, a coating agent composed of a urethane-based resin is preferable. Since the urethane-based resin forms a flexible film having high elasticity, there is no possibility that the entire coating adhesive tape 1 is made rigid. Further, the coating film has high appearance and high gloss as well as heat resistance, durability, weather resistance, and chemical resistance, and is suitable as a coat layer laminated on the coating film.

The clear coat layer 14 is preferably transparent, but may be colored to the extent that it does not completely cover the lower first coating film 41 and the second coating film 12 if necessary. Is also good. The thickness of the clear coat layer 14 is 5 to 5
It is preferably 0 μm, more preferably 5 to 40 μm. By setting the thickness of the clear coat layer 14 within this range, the function of protecting the first coating film 41 and the second coating film 12 can be sufficiently achieved. Further, the first coating film 4
The step between the first and second coating films 12 can be eliminated, and high durability and high appearance can be imparted.

Finally, the first coating film, the second coating film and the clear coat layer are simultaneously baked and cured. The baking temperature can be appropriately set depending on the type and thickness of the paint and the coating agent, but is preferably 120 to 200 ° C, more preferably 140 to 150 ° C. If the baking temperature is lower than 120 ° C., curing may not proceed sufficiently, which may lead to poor adhesion or poor appearance. On the other hand, if the baking temperature exceeds 200 ° C., cracks may occur in the coating film and the like, resulting in poor appearance. May be invited.

The substrate 10 to be coated is not particularly limited.
For example, in addition to vehicles such as automobiles, motorcycles, railway vehicles, and the like, buildings such as tanks and steel towers, etc., may be mentioned. In particular, the outer plate surface, which is the outer surface of vehicles such as automobiles, and resin bumpers are preferable.

As described above, according to the coating method using the pressure-sensitive adhesive tape for coating of the present invention, for example, in the two-tone coating, the coating step by spray coating can be omitted for at least one color portion. Therefore, the amount of the volatile organic solvent used can be reduced. Also, the first
Coating film 41, second coating film 12, and clear coat layer 14
Baking and hardening can be performed collectively, reducing the number of steps and significantly reducing the overall coating time,
As a result, the coating cost can be significantly reduced.

As described above, the coating adhesive tape of the present invention, the method of manufacturing the coating adhesive tape, and the coating method using the coating adhesive tape have been described based on the illustrated embodiments, but the present invention is not limited thereto. Not something.

[0056]

Next, specific examples of the present invention will be described. 1. Production of adhesive tape for painting

Example 1 An adhesive tape for coating having the following structure was prepared.・ Masking application tape (manufactured by Lintec Corporation, “AP-PVC50N Clear”) (base film: polyvinyl chloride (thickness: 50 μm),
Adhesive layer: Acrylic pressure-sensitive adhesive (thickness: 15 μm)
・ Coating film: 15 μm (dry film thickness) Acrylic urethane-based automotive exterior paint (Nippon Oil & Fats Co., Ltd.)
“PMH-100 Pacecoat”, containing aluminum as a silver metallic pigment (brilliant pigment) ・ Adhesive layer: 45 μm acrylic adhesive (“SK Dyne MB” manufactured by Soken Chemical Co., Ltd.)
-1 ") ・ Release sheet: 100 μm polyethylene terephthalate resin release sheet (“ PET100 S mat ”manufactured by Lintec Co., Ltd.)

First, a 75 μm-thick polyester resin process film (“T10 manufactured by Diafoil Hoechst Co., Ltd.”
0E75 ”), a paint was applied by spray coating on the surface subjected to the release treatment, and then dried to form a coating film 4.
Next, on the release-treated surface of the release sheet 2, the pressure-sensitive adhesive was dried to a thickness of 4 using a roll knife coater.
Coating was performed so as to have a thickness of 5 μm to form an adhesive layer 3. Next, the release sheet 2 and the polyester resin process film were bonded so that the adhesive layer 3 and the coating film 4 were laminated, and the coating film 4 was provided on the adhesive layer 3. Then, an adhesive layer of a masking application tape 5 was adhered onto the coating film 4 while peeling off the polyester resin process film, thereby producing a coating adhesive tape 1 provided with a release sheet 2 shown in FIG. .

Using the coating adhesive tape thus produced, a two-tone color coating was applied to the outer surface of an automobile. First,
The coating adhesive tape 1 was stuck to a predetermined position on the outer surface (substrate 10 to be coated) of the automobile which was intermediately coated in the pretreatment step.

After the adhesive tape for coating 1 was applied, the coated surface 101 was cleaned, and the second coating film 12 was spray-coated. Next, the masking application tape 5 was peeled off while the second coating film 12 was not dried (FIG. 3A). Finally, a clear coating layer 14 is provided by spray coating a coating agent over the entire surface of the first coating film 41 and the second coating film 12. After the clear coat layer 14 was provided, baking was performed at 140 ° C. for 40 minutes to cure and dry the paint and the coating agent.

(Example 2) Coating film 4 was prepared in the same manner as in Example 1.
Is formed, screen printing is performed on the coating film 4 and dried to form a primer layer 6 (thickness: 10 μm), and the adhesive layer of the masking application tape 5 is stuck on the primer layer 6. In the same manner as in Example 1, a coating adhesive tape 1 provided with a release sheet 2 was produced. The primer layer 6 was formed using a polyester resin (“3800 OC Clear” manufactured by Seiko Advance Co., Ltd.).

After that, the outer surface of the automobile was subjected to two-tone color coating in the same manner as in Example 1 using the prepared adhesive tape for coating.

Example 3 A pressure-sensitive adhesive sheet for coating provided with a release sheet 2 made of the same constituent material as in Example 1 except that a substrate 7 was interposed between the pressure-sensitive adhesive layer 3 and the coating film 4 1 was produced. As the base material 7, a polyvinyl chloride film ("HIS Paint 50" manufactured by Nippon Carbide Industry Co., Ltd.)
85-22 "thickness: 100 m).

First, the pressure-sensitive adhesive composition was applied to one surface of the substrate 7 by a roll coater to form a pressure-sensitive adhesive layer 3. Next, the release sheet 2 was stuck on the adhesive layer 3. further,
A coating film 4 is formed on the other surface of the base material 7 by spray coating, and is laminated on the coating film 4 so that the adhesive layer side of the masking application tape 5 is bonded to the coating film 4, so that a coating adhesive tape is formed. Was prepared.

Then, two-tone color coating was applied to the outer surface of the automobile in the same manner as in Example 1 using the prepared adhesive tape for coating.

Example 4 Example 4 was repeated except that a polyurethane film (manufactured by Asahi Chemical Industry Co., Ltd., thickness: 100 μm) was interposed between the pressure-sensitive adhesive layer 3 and the coating film 4. 2, a pressure-sensitive adhesive tape 1 for coating provided with a release sheet 2 as shown in FIG.

First, the pressure-sensitive adhesive composition was applied to one surface of the substrate 7 by a roll coater to form a pressure-sensitive adhesive layer 3. Next, the release sheet 2 was stuck on the adhesive layer 3. further,
A coating film 4 is formed on the other surface of the substrate 7 by spray coating, and then screen printing is performed on the coating film 4 to provide a primer layer 6. Finally, a masking application tape is formed on the primer layer 6. 5 was laminated so that the pressure-sensitive adhesive layer side was joined to the primer layer 6, thereby producing a pressure-sensitive adhesive tape for coating.

After that, the outer surface of the automobile was subjected to two-tone color coating in the same manner as in Example 1 using the prepared adhesive tape for coating.

Example 5 A coating adhesive tape 1 provided with a release sheet 2 shown in FIG. 2 was produced in the same manner as in Example 4 except that the adhesive layer 3 was formed using an adhesive. . This adhesive is composed of 100 parts by weight of an acrylic adhesive (“SK Dyne MB-1” manufactured by Soken Kagaku Co., Ltd.) and 25 parts by weight of a phenol resin (“BRM553A” manufactured by Showa Polymer Co., Ltd.). Obtained by mixing.

Thereafter, two-tone coating was applied to the outer surface of the automobile in the same manner as in Example 1 using the prepared adhesive tape for coating.

2. Rupture strength and rupture elongation of the pressure-sensitive adhesive tape for coating The rupture strength and rupture elongation of the pressure-sensitive adhesive tape for coating (excluding the release sheet 2) produced in Examples 1 to 5 were measured. The breaking strength and the breaking elongation were each measured according to JIS K7127. Table 1 shows the results.

3. Coating property evaluation of coating adhesive tape Appearance test Using the coating adhesive tape applied to the outer surface of the automobile of each example, for the appearance of the painted part,
Evaluation was made according to the following criteria. ◎ ・ ・ ・ Excellent with no color unevenness and gloss unevenness ○ ・ ・ ・ Good with almost no color unevenness and gloss unevenness × ・ ・ ・ Appearance defects such as color unevenness and gloss unevenness are observed. It is shown in FIG.

Finishability Test The finished state (hue and gloss) of the one coated with the pressure-sensitive adhesive tape of each example and the one coated by directly spraying the paint and the coating agent used in each example are visually observed. And evaluated according to the following criteria.・ ・ ・: The finished state is exactly the same, and the two cannot be distinguished by the naked eye. も の: Slight differences are observed. ×: Clearly distinguished. The results are shown in Table 1.

4. Evaluation of Adhesive Performance of Adhesive Tape for Painting The adhesive force of the adhesive tape for painting produced in Examples 1 to 5 was measured under the following conditions. First, the pressure-sensitive adhesive tape for coating in each example was cut into a width of 25 mm to prepare a test piece. Each of the test pieces was adhered to an adherend (melamine coated plate (Japan Test Panel Co., Ltd.)
)), And reciprocated one time with a 1 kg pressure roller.

After the test piece was pressed against the adherend, it was allowed to stand at room temperature for 24 hours, and after baking at 140 ° C. for 40 minutes, the adhesion was measured. The measurement of the adhesive strength was carried out by a 180-degree peeling method according to JIS Z 0237-8. These results are shown in Table 1 as adhesion.

Further, in the same manner, after the test piece was pressed against the adherend, the adhesive strength of the masking application tape 5 after being left at room temperature for 24 hours was measured. These results are shown in Table 1 as adhesion.

[0077]

[Table 1]

From the above results, it can be seen that the adhesive tapes for coating of each of the examples are very flexible and can be easily and satisfactorily adhered to corners and large areas of the substrate to be coated. I understood. Furthermore, after heat treatment such as baking was performed after sticking, the adhesive strength was remarkably improved. Further, it was found that a coating exhibiting exactly the same appearance as that obtained by directly spraying the coating can be applied by a simple method.

Further, according to the coating method using the adhesive tape for coating, when a two-tone color coating is applied, the coating step by spray coating can be omitted for at least one color part, so that the volatile organic solvent The usage can be reduced. In addition, the first coating film 41, the second coating film 1
Since the baking and hardening with the second and clear coat layers 14 can be performed collectively, the number of steps was reduced, and the overall coating time was significantly reduced.

[0080]

As described above, according to the pressure-sensitive adhesive tape for coating of the present invention, since the tape itself of the coating material has been achieved, it is possible to obtain exactly the same finish as when the coating material is directly applied. In particular, even in a metallic coating having a special color tone, color unevenness, streaks, and the like do not appear, and the coating can be performed with good reproducibility. Further, according to the present invention, having flexibility,
It is possible to obtain a coating adhesive tape having good followability to a curved surface and excellent handleability. Furthermore, according to the present invention,
After the application, the adhesive tape for heating can exhibit a stronger adhesive force by heating, and can provide a coating adhesive tape capable of maintaining excellent durability and weather resistance.

Further, since the coating process is greatly simplified, the emission of the volatile organic solvent into the atmosphere during the coating can be reduced. In addition, the manufacturing efficiency can be greatly improved, and the cost can be reduced. Since the adhesive tape for coating of the present invention has improved flexibility and curved surface followability and is excellent in handleability, it can be applied to a wide variety of articles and designs, and is expected to expand its use in various fields.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a coating adhesive tape of the present invention.

FIG. 2 is a sectional view showing a modified example of the coating adhesive tape of the present invention.

FIG. 3 is a cross-sectional view showing an example of a coating method using the coating adhesive tape of the present invention.

[Explanation of symbols]

 Reference Signs List 1 adhesive tape for coating 2 release sheet 3 adhesive layer 4 coating film 41 first coating film 5 masking application tape 6 primer layer 7 base material 10 base material to be coated 101 coated surface 12 second coating film 14 clear coat layer

Continued on the front page F-term (reference) 4D075 AD09 AE03 CA12 DA04 DB31 DC12 EA35 EB22 EB32 EB38 4J004 AA02 AA04 AA05 AA06 AA07 AA08 AA09 AA10 AA11 AA12 AA13 AA14 AA15 AB01 CA02 CA04 CA05 DA02

Claims (6)

[Claims] 1. An adhesive layer, a coating film made of a paint provided on a surface of the adhesive layer, and a coating film provided on a surface of the coating film opposite to a surface laminated on the adhesive layer. An adhesive tape for painting, comprising: a masking application tape. 2. The pressure-sensitive adhesive tape according to claim 1, wherein the paint contains a urethane resin as a main component. 3. The pressure-sensitive adhesive layer according to claim 1, wherein the pressure-sensitive adhesive layer is made of an adhesive containing an acrylic resin and a phenolic resin.
The adhesive tape for painting according to 1. 4. The coating adhesive tape according to claim 1, wherein a primer layer is interposed between the coating film and the masking application tape. 5. The pressure-sensitive adhesive tape for coating according to claim 1, further comprising a substrate between the pressure-sensitive adhesive layer and the coating film. 6. A step of forming a first coating film by sticking the adhesive tape for coating according to claim 1 on a part of the surface of a substrate to be coated; A step of forming a second coating film on a portion of the material surface where the adhesive tape for coating is not adhered, and a step of peeling off a masking application tape of the adhesive tape for coating. Painting method using.