JP2831733B2 - Paint film transfer sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention is intended to repair the surface flaws or cracks of a painted product obtained by painting the surface of an automobile body, an electric product, or the like, or to repair a required character. The present invention relates to a coating film transfer sheet capable of attaching a mark or a mark to an arbitrary object.

2. Description of the Related Art Conventionally, as a technique for repairing various painted products, particularly a car body or the like which is liable to have surface flaws due to a collision, a contact accident, etc., generally, an expert in sheet metal and painting in an automobile repair shop. There is a method in which an outer plate is formed and a paint of the same color is applied to the scratched portion by spraying.

According to such conventional means, it is necessary to prepare the same color paint in an automobile repair shop, but this color matching is very troublesome even for a considerably skilled person, and the work efficiency is extremely poor. was there.

Therefore, as a method of saving the trouble of color mixing and application, a method has been adopted in which a paint of a similar color is packed in a container together with a propellant gas and sprayed to a repaired portion by an aerosol spray method.

However, according to the spray method or the aerosol spray method, not only is it easy to cause unevenness in the spraying, but also if it is necessary to repair only a required portion neatly, it is necessary to paint the peripheral part of that part. It is difficult to do it easily, for example, it is necessary to cover the part with curing paper, and since the painting of the car is done with the colors that are applied by each company's own formulation, there are very many types of colors that are slightly different There is a problem that a spray must be prepared.

On the other hand, there is also a method of repairing a small flaw such as an automobile by applying a paint containing a small capacity container with a small brush.

However, according to this method, the thickness of the coating film varies greatly, and a uniform finish cannot be obtained, and a blur cannot be applied.

Also, as with aerosol sprays, numerous colors must be prepared.

In contrast to such conventional techniques, recently, as a method for eliminating the above-mentioned labor of color preparation and application and a method for solving the drawbacks of the spray method or the aerosol spray method, a color material (pigment, paint, etc.) of a predetermined color is applied to resin. Mixing and kneading,
A technique has been developed in which this is formed into a sheet shape, and the sheet is appropriately cut to the size of a portion to be repaired, and then separately fixed using an adhesive.

However, in order to mix and knead the coloring material into the resin, the compatibility between the coloring material and the resin is limited to the vinyl chloride resin. It is insufficient to attach such a resin sheet to an automobile body or the like due to lack of properties and light resistance.

In addition, while a vinyl chloride resin is formed into a sheet, the required thickness is required to express the color of the colorant mixed in the sheet as it is, but such a thick sheet is attached to the car body for repair. If it is attached, a step will occur between the car's body surface and the periphery of the seat, and the repair will not be able to be performed cleanly as if painted, but also the dirt will easily accumulate on the step, which is aesthetically pleasing. There was a problem that it was not preferable.

Furthermore, it is very difficult to cope with the subtle hue of a metallic coating that has been in the last few decades or a pearl metallic coating that has recently been in the limelight.

(Problems to be Solved by the Invention) In view of the above-mentioned prior art, the inventor of the present invention employs the same advanced paint system as an automobile body or the like while adopting the most advanced adhesive system having the ease of repair work and the like. In order to be able to prepare and prepare colors relatively easily, and to use paints that are excellent in weather resistance and light resistance as a major premise, and to be able to finish beautifully, paint films We studied in the direction of transcription.

Therefore, instead of mixing and kneading the coloring material into the vinyl chloride resin as in the above-described conventional technique, the present inventor applied an adhesive to one surface of a protective sheet treated with a release agent capable of being peeled off. The protective sheet was peeled off from the coating film and then tried to adhere to the body of the car (Japanese Patent Publication No. 61-47719). Because it is thin and brittle, it cannot be peeled off from the sheet well.Even if it can be peeled from the sheet, it is very difficult to handle it because it is thin and brittle, and it is very difficult to handle because it is cracked or chipped. Since the film is thin and the adhesive strength of the adhesive is strong, it is difficult to paste it without wrinkles, looseness, etc. Also, after pasting, it is impossible to repair it, there is no other way than scraping it, There was an inconvenience.

In order to solve these inconveniences, when the coating film is thickened,
Peeling from the sheet is easy to do, but originally the coating film itself is not so strong, so it is easy to crack or chip, and it does not eliminate wrinkles and loosening at the time of sticking,
No correction is possible.

In addition, a step is formed between the periphery of the coating film and the surface of an automobile body or the like, so that not only the finish is not beautiful, but also the dirt easily accumulates on the step, which is not good in aesthetic appearance.

In order to eliminate the brittleness of the coating film described above, there is a method of attaching a film on the coating film, but this has not led to an original solution.

Further, after the coating film has been applied to the automobile body, the film has to be peeled off and removed, resulting in an inconvenience that it takes time and effort.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the coating film transfer sheet according to the present invention is characterized in that, in claim (1), the release of a protective sheet having at least one surface subjected to release processing. An adhesive layer is provided on the treated surface, and the adhesive layer has a thickness of 10 to 30.
One side of a micron polyester base film is fixed, and the other side of the base film is coated with a primer which promotes the adhesion between the polyester base film and the coating, and the coating is coated with a coating having a thickness of 25 to 80 microns. They took the measure of fixing them as a coating film.

The polyester base film referred to herein is preferably a film having a high degree of polymerization that is hardly soluble in aromatic hydrocarbons, aliphatic hydrocarbons, ester solvents, ketone solvents, and alcohol solvents.

The thickness of the polyester base film is 10 to 30.
Microns are preferred.

If it is 10 microns or less, the effect of reinforcing the coating film is insufficient, and if it is 30 microns or more, the total film thickness of the base film and the coating film is too thick, and a step between the repaired surface and the peripheral portion occurs, which is not only aesthetically undesirable Or, dirt easily accumulates on the steps, which is extremely inconvenient.

As the protective sheet, it is preferable to use a polyester film, but any other sheet or film material usually used, such as polyvinyl chloride, polyethylene, polypropylene, polystyrene, paper, etc., may be used as appropriate.

The release treatment may be appropriately performed by a known means such as a silicon film, carnauba wax, or petroleum wax.

 The problem has been solved in claim (2) as follows.

That is, the polyester base film generally does not easily adhere to various paints.

Therefore, by studying various primers and applying a polyester resin which has an affinity for both the polyester base film and the paint and is soluble in an ester-based solvent and / or a ketone-based solvent, a predetermined paint is obtained. Could be fixed.

The paint may be a pearl metallic paint or a metallic paint other than the usual color paint.

As the resin for the paint, natural and synthetic drying oils, natural resins, synthetic resins such as phenol, epoxy, melamine, polyvinyl, polyester, acrylic and urethane, and fibrous resins such as nitrified cotton and CAB are usually used. They may be used alone or in combination.

As the pigment of the paint, any commonly used color pigments including white pigments, extender pigments, rust-preventive pigments, and other special pigments (so-called pearl pigments, fluorescent pigments, luminous pigments, conductive pigments, etc.) can be optionally used. They can be used alone or in combination.

As the additives of the coating material, commonly used drying agents, plasticizers, surface conditioners, defoamers, consistency adjusters, diluents, ultraviolet absorbers and the like may be optionally used.

Other paint compounding agents include nylon powder,
Particles, granules, powders and leather particles of synthetic resins such as olefin powders and urethane powders, and particles, powders and fibers of natural products such as fibers may be used freely.

 The coating thickness is preferably from 25 to 80 microns.

If it is less than 25 microns, the ability to hide the base (hiding power) will be insufficient, and if it is more than 80 microns, the total thickness of the base film and the coating film will be too thick, causing a step between the repaired surface and the peripheral edge, which is aesthetically pleasing Not only that, but dirt easily accumulates on the steps, which is extremely inconvenient.

In addition, the adhesive layer may use a commonly used adhesive.

In addition, it is more convenient to make a cut by predicting the use and the size of the scratch.

(Action) In the present invention, the base film and the paint can be fixed by applying a polyester resin having affinity to both the polyester base film and the paint in advance.

By making the coating film reinforced with the base film in this way, it becomes a composite coating film having appropriate flexibility, so it is easy to peel off from the protective sheet, without cracking or chipping, at the time of sticking The wrinkles and slacks were also eliminated.

In addition, by forming a composite coating film of a polyester base film and a coating film, correction after application can be easily performed by heating the repaired portion.

(Example) An example of the present invention will be described in detail below with reference to the drawings.

This drawing is partially exaggerated for clarity of the structure.

Therefore, it can be easily understood that the thickness of each layer is different from the actual one.

First, the protective sheet 1 was made of a polyester film having a thickness of 100 μm as a material, and a release function was imparted by coating a silicon film 2 on one side thereof.

The protective sheet 1 is provided with a 20-micron acrylic adhesive layer 3 on the side surface on which the release treatment has been performed.

On one side of the adhesive layer 3, one side face of a 15 micron thick polyester base film 4 was fixed.

Next, a primer 5 is provided on the other side of the base film 4.
Was applied and dried to form an acrylic urethane-based metallic coating material 6 thereon as a coating film having a thickness of 30 μm.

Then, a cut 7 having an appropriate size and extending from the paint 6 to just before the protective sheet 1 was made.

The protective sheet 1 is peeled off from the base film 4 at the above-mentioned cuts 7 so that an automobile body, a motorcycle body,
The protective sheet subjected to the release treatment was peeled off and attached to the scratches of the washing machine.

It was not peeled off by ordinary car washing or cleaning and the friction of the car washing brush.

In addition, there were no abnormalities such as peeling and cracking during normal use.

Next, when the sticking position was heated with a dryer in order to repair the sticking position, the sticking portion was easily peeled off and could be stuck to the correction position.

 There was no problem in the adhesiveness of the modified sticking part.

[Comparative Example 1] First, a release function was imparted by applying a silicon film to one side of a 100-μm-thick polyester film.

An acrylic adhesive layer having a thickness of 20 μm was provided on the release-treated side surface of the protective sheet.

An acrylic urethane-based metallic paint was formed thereon as a thick film having a thickness of 30 microns. (Japanese Patent Publication No. 61-47719
No.) Thereafter, the protective sheet was peeled off from the coating film, but it was difficult to peel off because the coating film was thin, and the peeled coating film was clung to the hands and cracked.

Although it was cracked or chipped, somehow the coating film was peeled off, and when I tried to apply it to the scratched part of the car body, the coating film was partially attracted to the body and could not be applied smoothly.

 In addition, wrinkles also occurred.

I tried to peel it off to fix it again, but it didn't come off.

[Comparative Example 2] The coating film was thickened in an attempt to improve the disadvantages of Comparative Example-1.

That is, the acrylic urethane metallic paint of Comparative Example 1 was formed as a coating film having a thickness of 150 microns.

Similarly, when peeling off from the protective sheet, it peeled off relatively well, but again it clung to the hand, cracked or chipped.

If you try to apply the coating to scratches on the body of the car,
After all, it was difficult to apply smoothly, and some wrinkles occurred.

I tried to peel it off to fix it and tried to peel it off, but it didn't come off.

Also, when the body of the attached car was exposed outdoors, dirt accumulated on the step between the periphery and the body surface became black in three months, making it unsightly.

[Comparative Example-3] In Comparative Example-3, in order to improve the disadvantages of Comparative Examples 1 and 2, a method of bonding a film on a coating film was considered.

That is, one side of a polyester film (protective sheet) having a thickness of 100 microns was subjected to a release treatment with a silicon film.

On the other hand, an acrylic urethane-based metallic paint is formed on one side of a 10 micron polyester film (referred to as guard film) with a 30 micron coating film.
An acrylic adhesive layer of 20 microns was provided.

As described above, a polyester film (protective sheet) having a release treatment of 100 microns, a coating film and an adhesive layer were formed.

A 10 micron polyester film (gart film) was overlaid so that the release layer and the adhesive layer faced each other so that air did not enter.

When the protective sheet is to be peeled from the composite film thus produced, the protective sheet is peeled off or the guard film is peeled off, so that the peeling cannot be performed properly.

Carefully peeled off only the protective sheet and affixed it to the scratch on the car body.

Since the guard film itself was thin, it was difficult to peel it off, which was troublesome.

Thereafter, when the guard film was to be peeled off, the coating film was partially lifted by the peeling force. Then, it was pressed again with a soft cloth and attached.

Also, I tried to remove the sticking part to fix it, but it did not come off, so I scraped it off with # 150 sandpaper.

Then, the following table is shown so that Comparative Example 1-3 and the present invention can be easily compared.

In Table 1 above, the term “easiness of peeling” refers to the ease of peeling the protective sheet.

Further, the brittle resistance and the easiness of chipping refer to the strength of the coating film itself.

Further, the aesthetic appearance refers to a beautiful finish including a lift, wrinkles, blemishes, and a step between the repaired peripheral portion and the like after the transfer of the coating film.

Further, the term “correction” refers to the difficulty of removing and re-applying the film after transferring the coating film once and then trying to change or correct the application position.

 Here, ○ indicates good, Δ indicates somewhat poor, and × indicates poor.

(Effects of the Invention) According to the present invention, it is possible to form a film that is extremely thin as compared with the case of adhering a sheet in which a pigment or the like is kneaded into a resin, and the step between the repaired portion and the peripheral portion is almost inconspicuous, and the finish is low. good.

And since the coating film is reinforced with the polyester base film, it is very strong and cannot be easily broken.

Moreover, since the coating film and the polyester base film are strongly integrated by the primer, they can be used for a long time without peeling off each other.

In addition, since the coating film and the polyester base film are integrated, not only the work of attaching to a repaired part such as an automobile can be easily performed, but also the correction can be easily performed.

In addition, since it can be cut arbitrarily, there is an advantage that it can be used in accordance with the size of the corrected portion.

[Brief description of the drawings]

The drawing is an enlarged vertical sectional side view of the coating film transfer sheet according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Protective sheet, 2 ... Silicon film 3 ... Adhesive layer, 4 ... Base film 5 ... Primer, 6 ... Paint 7 ... Cut

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-138213 (JP, A) JP-A-1-156097 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B32B 1/00-35/00

Claims (4)

(57) [Claims] An adhesive layer (3) is provided on the release-treated surface of a protective sheet (1) having at least one surface subjected to a release treatment, and the adhesive layer (3) is formed of a 10 to 30 micron polyester base film (4). One side is fixed, and the other side of the base film 4 is coated with a primer 5 for promoting the adhesion between the polyester base film 4 and the coating 6, and the coating 6 is coated thereon.
A coating film transfer sheet fixed as a coating film with a thickness of 25 to 80 microns. 2. The method according to claim 1, wherein the primer is a polyester resin soluble in an ester solvent and / or a ketone solvent having an affinity for both the polyester base film 4 and the paint. Coating sheet transfer sheet. 3. The coating film transfer sheet according to claim 1, wherein the paint 6 is a pearl metallic paint. 4. The coating film transfer sheet according to claim 1, wherein the paint 6 is a metallic paint.