JP2934593B2 - Adhesion method of light shielding film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for bonding a light-shielding film bonded to a window glass of a vehicle such as a passenger car for the purpose of cutting off ultraviolet rays into a passenger compartment.

[0002]

2. Description of the Related Art In a vehicle such as a passenger car, an occupant is intended to cut off glare from the sun and ultraviolet rays, or to prevent fading of ornaments in the cabin, and to sharpen the external view from the cabin. A light shielding film is adhered to a vehicle window glass including a rear window glass. Conventionally, the following construction method has been generally employed for bonding the light-shielding film to the vehicle window glass, taking the rear window glass as an example. First, a car film divided product having a size obtained by dividing the size of the rear window glass into three equal parts or four equal parts is cut so that connection portions thereof are overlapped. Then, with respect to the first car film divided product, the peeling film is peeled off, and the peeled surface of the adhesive is opposed to a predetermined glass surface of the rear window glass. Make a temporary attachment. Next, the second light-shielding film is temporarily attached to the second car light-shielding film such that the boundary line of the light-shielding film according to the first car-light light-split part overlaps with the second light-shielding film. Subsequently, the portion of the light-shielding film where the first and second sheets overlap is cut with a cutter or the like to remove unnecessary portions related to the first and second light-shielding films. At this time, the joint between the first sheet and the second sheet is made to be indistinguishable along the fogging heat wire. The third or fourth light-shielding film is formed in the same manner as the above. Thereafter, trimming or the like is performed to complete the adhesion of the light-shielding film.

[0003] In the above construction, the car film is divided into a number of parts because a worker enters a narrow cabin, and peels off the release film so that the adhesive surface faces the glass surface to clean one large light-shielding film. This is because it was difficult to stick it on the surface. One car film is too large and is difficult to handle, and the light-shielding film is easily broken, so that it remains as a scratch, and it often happens to start over from the beginning. In addition, depending on the type of vehicle, the rear window glass has a curved shape, and if a large piece of light-shielding film is adhered, wrinkles are generated by splitting the light-shielding film because the appearance is poor due to partial wrinkles This is because it was necessary to avoid the problem.

[0004]

However, in the conventional method of bonding a light-shielding film, the work has to be repeated a plurality of times only by dividing the light-shielding film into a plurality of parts, which requires a long operation time. In addition, since the work of making the seams of the divided light-shielding films along the hot wire line for removing the fogging requires skill and must be performed carefully, the burden of labor and time is further increased. On the other hand, not all vehicles are equipped with a hot wire for demisting, and in the case of vehicles without a hot wire, the joints can be found by adjusting the amount of light rays, and the problem was not hidden .

[0005] As a countermeasure, the work of peeling the release film in a narrow cabin is stopped, and before entering the cabin, the car film cut to a predetermined size is placed on a work bench or the like. Attempts have also been made to bring a light-shielding film in which the surface of the adhesive is exposed into a vehicle interior, and stick the light-shielding film on the glass surface as it is. However, according to this method, the surface of the pressure-sensitive adhesive is exposed, so that the light-shielding film picks up dust and is not in a state where it can be used as a product when viewed with the light-shielding film attached. In general, the site where the light-shielding film is applied is far from the clean room, and even if it is cleaned no matter how long, it takes a long time to remove the adhesive surface from the workbench and bring it into the cabin. ， The dust was definitely picked up, and the shading film became defective. In addition, it is necessary to bring the light-shielding film with the adhesive surface as it is into a narrow cabin and stick the light-shielding film over the entire glass surface so that the adhesive surfaces do not stick together.
It was very difficult.

The present invention solves the above-mentioned problems , and does not pick up dust or dirt on the light-shielding film , and also allows one worker to quickly attach the light-shielding film in the state of one large light-shielding film. It is an object of the present invention to provide a method for bonding a light-shielding film that can be accomplished.

[0007]

The gist of the first invention is to provide a car window in which a light-shielding film is adhered using a car film in which a release film is laminated on a light-shielding film via an adhesive layer. A step of cutting the car film into one piece of glass size, a step of peeling off the release film according to the one piece, a step of returning the original by interposing moisture between the release film and the adhesive surface, and a step of peeling The step of winding the above-mentioned single piece having moisture interposed between the film and the pressure-sensitive adhesive surface into a roll, and peeling the release film so that the pressure-sensitive adhesive surface is opposed to the glass surface of the vehicle window glass. Unwrapping the roll-like body and attaching the light-shielding film to the vehicle window glass.

[0008] The gist of the second invention is to use a car film in which a release film is laminated on a light-shielding film via an adhesive layer. Cut the car film on one piece of the material, then peel off the release film of the one piece, spray mist between the release film and the adhesive surface, cover the release film on the adhesive surface again Then, after spraying a mist on the release film, the single piece is wound up into a roll with the release film facing inward, and then the release film of the roll is removed. While leaving on the back of the surrounding light-shielding film,
A method for bonding a light-shielding film is characterized in that a light-shielding film is attached to a vehicle window glass with an adhesive surface facing a glass surface of the vehicle window glass. The third departure
The method of bonding the light-shielding film is the first invention or the second invention
When attaching the light-shielding film to the vehicle window glass, lock the light-shielding film or the light-shielding film and the release film on the glass surface with a suction cup, and then attach the remaining light-shielding film to the glass surface. It is characterized by wearing.

According to the method for bonding a light-shielding film of the first invention, since moisture is imparted between the release film and the surface of the pressure-sensitive adhesive and is returned to the original position, the release film is attached when the light-shielding film is attached to the glass surface. Easy to peel off. And even if one sheet is large, it is wound up in a roll-shaped body, so that the application of the light-shielding film in the vehicle interior proceeds smoothly. Further, as in the second invention, when a mist is sprayed on the release film, and one piece is wound up into a roll with the release film on the inside, the release film of the roll is light-shielded around the inside. Since the light-shielding film can be adhered to the glass surface while being left on the back of the film, there is no difficulty in handling the release film at the time of adhering. Using a suction cup as in the third invention
Then , it becomes possible to prevent the light-shielding film that has been pasted (or the light-shielding film and the release film adhered to the upper surface thereof) from falling off, so that the operation proceeds smoothly.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the method for bonding a light-shielding film according to the present invention will be described in detail. (1) Embodiment 1 FIGS. 1 to 10 show an embodiment of a method for bonding a light-shielding film according to the present invention, which is applied to a rear window glass of a passenger car as a vehicle window glass. 1 is a partially enlarged cross-sectional view of a car film, FIG. 2 is a perspective view showing a state in which the car film of FIG. 1 is cut into a predetermined size, and FIG. 3 is a plan view of the cut single film. FIG. 4 is a perspective view showing a state in which mist is sprayed between the release film and the surface of the pressure-sensitive adhesive, FIG. 5 is a perspective view showing that one sheet is wound up into a roll after completion of the process of FIG. 4, and FIG. Is a cross-sectional view of the roll-shaped body after winding, FIG. 7 is a cross-sectional view illustrating a process of attaching a light-shielding film to the rear window glass while unwinding the roll-shaped body, and FIG. 8 is a state in which the operation of FIG. FIG. 9 is a longitudinal sectional view of FIG. 8, and FIG. 10 is a longitudinal sectional view of the stage after the light-shielding film has been applied.

The car film α used in the method for bonding the light-shielding film 1 of the present invention has a sandwich structure in which the pressure-sensitive adhesive layer 2 is interposed between the light-shielding film 1 and the release film 3 as shown in FIG. When sticking to the glass surface 7a, the release film 3 is peeled off, and the light-shielding film 1 is attached to the vehicle window glass so that the adhesive surface 2a faces the glass surface 7a. The light-shielding film 1 has a structure in which a base film (here, a polyester film) is coated with a pigment or the base film itself is dyed so that ultraviolet rays or the like are cut off.

The method of bonding the light-shielding film 1 to the rear window glass 7 is performed in the following order. First,
From the outside of the car, the rear window glass 7 is covered with the designated car film α and cut into a single piece A of a predetermined size (FIG. 2). 2 is still in the stage of being simply cut from the car film α bundle. The car film α is adapted to the shape of the rear window glass 7, and in view of the fact that the light-shielding film 1 is ultimately stuck from the passenger compartment side, particularly, the groove portion on the passenger compartment side and the mounting portion of other interior parts After examining these, it is cut in accordance with the outer peripheral curve of the rear window glass 7 while taking these factors into account. FIG. 3 shows the sheet A thus produced. In addition, an ear may be attached to the side edge e of the single piece A in order to facilitate the handling of the sticking (FIG. 3).

Next, the sheet A is placed on a worktable such as a table T and the aqueous solution L is placed between the release film 3 and the adhesive surface 2a while peeling the release film 3 of the sheet A.
Is sprayed with mist (Fig. 4). In FIG. 4, the release film 3 is widely opened for easy understanding, but actually, the release film 3 is separated from the adhesive surface 2a.
The mist (moisture) by the sprayer 8 is sprayed so as to spread evenly over the pressure-sensitive adhesive surface 2a. This spraying keeps a narrow gap,
After the application of moisture to the region up to substantially the center of the single sheet A is completed, the peeled release film 3 is once put on the pressure-sensitive adhesive surface 2a. Next, the release film 3 at the opposite position
And spray the mist in the same way up to the center position. After the spraying, the release film 3 is put on the pressure-sensitive adhesive surface 2a again to return to the original state. The mist spraying operation (moisture application) needs to be performed carefully and in a short time because dust floating in the air may adhere to the adhesive surface 2a while the gap is opened. And then
After completing the spraying of the mist over the entire area of the pressure-sensitive adhesive surface 2a, this time, on the release film 3 which has been restored,
Further, a mist is sprayed over the entire surface.

The aqueous solution L of the mist sprayed using the sprayer 8 may be just water, but if a small amount of a detergent (for example, a kitchen detergent) is added, the glass surface 7 to be described later may be used.
When the light-shielding film 1 is adhered to “a”, the release film 3 is easily peeled off from the light-shielding film 1, which is more preferable. Here, several drops of a kitchen detergent (manufactured by Lion Corporation, trade name: Charmy Green) are added to 500 ml of tap water. In the present embodiment, the aqueous solution L is sprayed to apply water between the release film 3 and the adhesive surface 2a. However, instead of this, it is also possible to apply water to the release film 3 with a brush or the like. it can.

Subsequently, the sheet A is wound up into a roll R with the side of the release film 3 on which the mist is sprayed facing in (FIG. 5). At the stage of being wound up by the roll R, the release film 3 or the adhesive surface 2a
The excess aqueous solution L (moisture) on the top oozes out to the side. The single sheet A, which has been in a planar state and occupies a large occupied area, becomes extremely small when wound up as a roll-shaped body R (FIG. 6). Note that FIGS. 6, 7, and 1
In FIG. 1, hatching of the light-shielding film 1 is omitted for easy understanding of the cross-sectional view.

After that, the operation of bonding the light shielding film 1 to the glass surface 7a of the rear window glass 7 is started. Prior to this, the interior glass surface 7a is cleaned thoroughly. The glass surface 7a is washed with water to completely remove attached dust. Then, the roll-shaped body R is brought into the vehicle interior, and the light-shielding film 1 is attached. Shading film 1
As shown in FIG. 7, the peeling film 3 is peeled off, and the exposed pressure-sensitive adhesive surface 2a is opposed to the glass surface 7a of the rear window glass 7 while leaving the peeling film 3 on the back surface of the light-shielding film 1 around the inside. The light-shielding film 1 is attached to the rear window glass 7. Here, when the mist is sprayed on the release film 3, the release film 3 adheres to the back surface of the light-shielding film 1, which is one circumference inside, without difficulty due to the action of moisture. On the other hand, the release film 3 can be easily peeled off from the light shielding film 1 by applying mist to the pressure-sensitive adhesive surface 2a which has been treated in advance. If the car film α is a single sheet A simply cut to a predetermined size, it is difficult to peel off the release film 3 from the light-shielding film 1, and the light-shielding film 1 is easily broken and easily damaged. With the mist interposed on the adhesive surface 2a, the release film 3
Can be easily peeled off, and the light-shielding film 1 can be easily attached to the glass surface 7a. On the other hand, the single-piece A wound up by the roll-shaped body R is small, easy to carry, and easy to handle in the cabin, so that there is no more trouble for the operator to handle it.

Further, from the state shown in FIG. 7, the roll-shaped body R is unwound along the glass surface 7a (FIG. 8), and the light-shielding film extends from the starting point S to the end point G of the rear window glass 7 over the entire glass surface 7a. 1 (Fig. 1)
0). In the process of attaching the light-shielding film 1, the release film 3
Is placed on the back surface of the light-shielding film 1 shifted by about πD with respect to the diameter D of the roll-shaped body R, so that there is no difficulty in handling the peeled-off peeling film 3 as in the related art. After the attachment of the light-shielding film 1 to the glass surface 7a, if the leading end 31 is wound up, the release film 3
Can be taken out of the vehicle in a state of being wound up small. In addition, the release film 3 appears to be delayed from the light-shielding film 1 by πD, and the rear portion 32 of the release film 3 floats in the final stage. It is also possible to pull it out. After pulling out the rearward portion 32, the end point G of the light-shielding film 1 is pressed against the glass surface 7a.

By the way, in the rear window glass 7 and the like, it is normal that the light shielding film 1 is inclined upward toward the roof. Even if the light shielding film 1 is bent, the light shielding film 1 falls down while complete adhesion is not provided. (The broken line in FIG. 9). In addition, in the present embodiment, since moisture is interposed as described above, when the light-shielding film 1 is pasted as shown in FIGS. 7 and 8, the glass surface 7a to which the light-shielding film 1 is to be adhered. Therefore, the light-shielding film 1 is easily slipped, and the release film 3 attached to the back surface of the light-shielding film 1 is also easily slipped. Therefore, here, from the top of the light-shielding film 1 (or the peeling film 3 attached to the upper surface of the light-shielding film 1), the figure is viewed from the vicinity of the starting point of the light-shielding film 1 on the glass surface 7a. The above problem is solved by pressing the suction cup 4 as shown in FIG. 9 against the glass surface 7a, locking the light-shielding film 1 in this portion to the glass surface 7a, and adhering the remaining light-shielding film 1. doing. A magnet is applied from the outside of the vehicle, and a magnetic material is attracted to the magnet from the vehicle interior side so that the glass surface 7a
However, in this method, two workers are required on the vehicle cabin side and the outside of the vehicle, and the labor cost increases when the light shielding film 1 is bonded on a business trip or the like. . Even if the light-shielding film 1 is placed on the glass surface 7a, and the slippery release film 3 is further placed on the light-shielding film 1, the light-shielding film 1, which is stuck on the vehicle compartment side with the suction cup 4, removes the light-shielding film 1. It has been found that the film 3 can be locked on a predetermined glass surface 7a. By this method,
A worker working in the vehicle cabin can lock one portion of the light-shielding film 1 (which is easy to fall down or slide down) (and further, the portion of the release film 3) with the suction cup 4, thereby enabling one-person operation. of course,
Any number of suction cups 4 can be used as needed.

On the other hand, since the rear window glass 7 does not always have a planar configuration as shown in FIG. 10, the light-shielding film 1 having been pasted on the glass surface 7a tends to have wrinkles W partially. In particular, in the case of the light-shielding film 1 made of one sheet A, the occurrence of wrinkles W increases as compared with the divided product. However, in the present embodiment, such wrinkles W are eliminated by blowing hot air. The light-shielding film 1 is originally a two-dimensional film even if the light-shielding film 1 tries to conform to the curved shape of the rear window glass 7, and the wrinkles W are inevitably formed because the light-shielding film 1 is not formed in the curved shape. On the other hand, when hot air is blown on the wrinkle W portion of the light-shielding film 1 to disperse the wrinkle W, the wrinkle W disappears without leaving any trace . As a device for blowing hot air, a heat gun (manufactured by Ishizaki Electric Co., Ltd., trade name: plug jet type: PJ-214A) is used here. This heat gun was able to blow hot air having a maximum capacity of 650 ° C., unlike a simple dryer or the like, and was extremely effective in eliminating the wrinkles W under temperature control. The light-shielding film 1 made of a thermoplastic resin such as a polyester-based resin is solid at room temperature, but softens and becomes a fluid when heat is applied. Therefore, by applying heat, the wrinkle W portion is softened and dispersed well. And disappear
Wear.

Thus, the wrinkles W remaining on the light-shielding film 1 are eliminated, and if necessary, the light-shielding film 1 is finally trimmed to complete the adhesion of the light-shielding film 1 to the rear window glass 7.

The method of bonding the light-shielding film 1 configured as described above is such that even if the single light-shielding film 1 has a large size, the single light-shielding film 1 is wound on a roll-shaped body R and brought into the vehicle interior. It does not hinder the work of attaching the light-shielding film 1. Prior to the attachment of the light-shielding film 1, moisture is previously applied between the release film 3 and the adhesive surface 2a.
Can be easily peeled off at the stage of sticking. Conventionally, when a large piece A is used, it is difficult to peel off the light-shielding film 1 at the stage of peeling the release film 3 and the like, and the light-shielding film 1 often breaks and leaves scratches. Not be. Further, conventionally, since the light-shielding film 1 and the release film 3 are spread in a “C” shape, it is difficult to treat the peeled release film 3. Since the film 3 adheres, the worker can concentrate on the work of attaching the light-shielding film 1 and can complete the adhesion of the light-shielding film 1 with good quality. That is, the light-shielding film 1
It is only necessary to consider a treatment for peeling off the release film 3 after the application of the film is completed, and it is easy to perform as a work process procedure. The light-shielding film 1 is made of a glass surface 7a.
Since it is peeled off immediately before being attached to the device, there is no room for dust to enter, and a high-quality bonding technology is secured. In addition, the use of the suction cup 4 makes it possible for one person to work, which contributes to labor saving and, in particular, helps to reduce labor costs during business trips and the like. Of course, there is no need for two workers to enter the narrow cabin,
The work itself is easier to do. In addition, wrinkles W caused by using the large single-piece light shielding film 1 can be eliminated by blowing hot air, so that there is no inconvenience. Since the method of bonding the light-shielding film 1 that has become a single large piece A becomes possible, not only does the work proceed smoothly, but also the problem of joints in vehicles without heat rays is eliminated, and the quality is excellent. Demonstrate the power.

(2) Embodiment 2 In this embodiment, a mist is sprayed between the release film 3 and the adhesive surface 2a, but no mist is sprayed on the release film 3 as in the first embodiment. Then, after the moisture is interposed between the release film 3 and the pressure-sensitive adhesive surface 2a and the film is returned to the original state, the sheet A is wound up around the roll R with the light-shielding film 1 inside. Thereafter, as shown in FIG. 11, the roll-shaped body R is unwound while peeling the release film 3 so that the adhesive surface 2a faces the glass surface 7a of the vehicle window glass, and the light-shielding film 1 is attached to the vehicle window glass. To go. As the attachment of the light-shielding film 1 to the vehicle window glass progresses, the release film 3 is separated from the roll-shaped body R. For this reason, there is a disadvantage that the disassembly of the release film 3 is more troublesome than in the first embodiment. Other configurations and operations are basically the same as those of the first embodiment, and exhibit excellent effects similar to those of the first embodiment.

In the present invention, the present invention is not limited to those shown in the above embodiments, but can be variously changed within the scope of the present invention depending on the purpose and application. The shape, size, material, and the like of the light-shielding film 1, the adhesive layer 2, the release film 3, the suction cup 4, and the like can be appropriately selected. The mist component may consist solely of water. The vehicle window glass is not limited to the rear window glass but can be applied to a windshield and the like. Furthermore,
The invention is not limited to passenger cars and can be applied to all vehicles.

[0024]

As described above, the method for bonding a light-shielding film according to the present invention enables a single worker to quickly perform a sticking process in the state of a single large light-shielding film, and furthermore, to remove dust and dirt. It has a great effect on quality improvement, labor saving, etc., as it does not pick up dust.

[Brief description of the drawings]

FIG. 1 is a partially enlarged cross-sectional view of a car film according to a first embodiment.

FIG. 2 is a perspective view showing a state in which the car film shown in FIG. 1 is cut into a predetermined size.

FIG. 3 is a plan view of one cut piece.

FIG. 4 is a perspective view showing a state in which mist is sprayed between a release film and an adhesive surface.

FIG. 5 is a perspective view of winding one sheet into a roll after completion of the step of FIG. 4;

FIG. 6 is a cross-sectional view of the rolled body after winding.

FIG. 7 is a cross-sectional view illustrating a step of attaching a light-shielding film to a rear window glass while unwinding the roll.

8 is a perspective view showing a state where the operation of FIG. 7 is nearing the end.

FIG. 9 is a longitudinal sectional view of FIG.

FIG. 10 is a vertical cross-sectional view at the stage when the light-shielding film has been pasted.

FIG. 11 is a cross-sectional view illustrating a step of attaching a light-shielding film to a rear window glass while unwinding the roll-shaped body in the second embodiment.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 light-shielding film 2 adhesive layer 2 a adhesive surface 3 release film 4 suction cup 7 rear window glass (vehicle window glass) 7 a glass surface A single sheet e aqueous solution (water) R roll body W wrinkle α car film

Claims (3)

(57) [Claims] 1. Using a car film in which a release film is laminated on a light-shielding film via an adhesive layer, (a) a single piece of vehicle window glass to which the light-shielding film is attached Cutting a car film; (b) peeling off the release film according to the single piece, and returning the original film by interposing moisture between the release film and the pressure-sensitive adhesive surface; Winding the above-mentioned single piece having moisture interposed between it and the surface of the agent into a roll, and (d) peeling off the release film so that the surface of the adhesive faces the glass surface of the vehicle window glass. Unwrapping the roll-like body and attaching the light-shielding film to the vehicle window glass. 2. Using a car film in which a release film is laminated on a light-shielding film via an adhesive layer, first, a single piece of vehicle window glass to which the light-shielding film is adhered is used. Cut the car film, then peel off the release film according to the one piece, spray mist between the release film and the adhesive surface, cover the release film on the adhesive surface again and return to the original state, further After spraying a mist on the release film, the single piece is wound up into a roll so that the release film is on the inside,
Thereafter, the light-shielding film is adhered to the vehicle window glass with the adhesive surface facing the glass surface of the vehicle window glass while the release film of the roll is left behind the light-shielding film around the inside. Method of bonding light-shielding film. 3. When the light-shielding film is attached to the vehicle window glass, the light-shielding film or the light-shielding film and the release film that have been pasted are locked to the glass surface with a suction cup, and the remaining light-shielding film is attached to the glass. Request to stick on the surface
Item 3. The method for bonding a light-shielding film according to Item 1 or 2 .