JP2002194307A - Making tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a masking tape with which a plurality of masking tapes can be applied without increasing a man hour, a mistake hardly occurs in a subsequent peeling operation and qualities and productivity can be improved. SOLUTION: This masking tape is obtained by laminating a plurality of films composed of a substrate layer and an adhesive layer. The adhesive strength of the film 12 positioned at a lower part is made stronger than that of the film 14 positioned at an upper part. In the masking tape, a plurality of masking tapes are applied to the same part by one application operation, the operation is carried out without increasing the number of processes and is exceedingly easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a masking tape used for separating a coated portion and a non-coated portion when a paint or an adhesive is applied.

[0002]

2. Description of the Related Art When manufacturing building materials, various products, parts, and the like, it is frequently performed to apply a paint or an adhesive to them. In this case, the coating is often applied not only to the entire surface but also to only a part of the surface. In such a case, a masking tape is pasted to such a non-applied portion in advance, and then the coating operation is performed. It is common practice to peel off the masking tape after it has dried and apply it only to the required areas.

[0003]

However, depending on the manufacturing process, it may be necessary to apply a masking tape to the same location a plurality of times. In such a case, not only the number of steps is increased, but also if a masking tape is not further adhered without being shifted from the first masking tape, a masking unnecessary area is masked, and a coating failure or an adhesion failure is caused. Cause However, it is difficult to stick the masking tape in exactly the same way when the masking tape is stuck to the place where the first masking tape was stuck. In particular, in a process where a worker must manually apply a masking tape at a construction site or the like, it is practically difficult to require high precision in the masking tape attaching work, resulting in a decrease in quality, work efficiency, etc. Cause. Also, even if another masking tape can be accurately pasted on the first masking tape, the lower masking tape is also peeled off at the time of peeling off only the masking tape that is pasted on top. In some cases, it became useless. Furthermore, after laminating the same masking tape multiple times, the masking tape will be peeled off in order as the process progresses. In some cases, the user forgot or inadvertently peeled off the masking tape that should not be peeled off.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is possible to easily attach a plurality of masking tapes without increasing man-hours, and to cause an error in a subsequent peeling operation. It is an object of the present invention to provide a masking tape which is difficult to improve the quality and productivity.

[0005]

The masking tape of the present invention is a masking tape in which a plurality of films each composed of a base layer and an adhesive layer are laminated, wherein the adhesive force of the lower film is higher. Is characterized in that the adhesive strength is higher than the adhesive strength. Here, it is desirable that the adhesive layer has at least one film partially provided on the base material layer. In that case, it is desirable that the adhesive layer is formed linearly along the longitudinal direction of the tape. It is also desirable to make the shape of the adhesive layer of each film different for each layer. It is desirable that the area of the adhesive layer of the film located below is larger than the area of the adhesive layer of the film located above. Further, it is desirable that at least one or more films have a colored adhesive layer and / or base material layer. It is desirable to use a woven fabric or a stretched tape that has been stretched at least in the transverse direction of the tape as the base layer.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A masking tape according to the present invention comprises a plurality of films 12, 14 as shown in FIGS.
It is of a laminated configuration consisting of The number of laminations is determined as needed. For example, a two-layer structure is optimal if the masking tape is peeled twice, and a three-layer structure is optimal if the number of peelings is three. is there. Each film comprises a base layer and an adhesive layer. That is, as shown in FIG.
Each of the films 12 and 14 includes a base layer 16 and an adhesive layer 18, and a base layer 20 and an adhesive layer 22, respectively. As the substrate layer, those made of various kinds of flexible synthetic resins are preferable, and for example, polyolefins such as polyethylene and polypropylene, polyesters such as PET, vinyl chloride, and vinylidene chloride are preferable. Of course, chemical resistance to paints and adhesives to which the masking tape is applied is required. Further, in the case where the adherend is heat-treated while the masking tape is adhered, the masking tape is also required to have appropriate heat resistance. The pressure-sensitive adhesive layer may be a known one that sufficiently adheres to the base material layer and the adherend, and for example, acrylic, polyisobutylene, polyvinyl ether, and the like can be applied. Usually, the masking tape is stored in a wound state or the like, and the masking tape is pulled out and used at the time of use. In the wound state, the adhesive layer 18 of the lowermost film 12 and the base material layer 20 of the uppermost film 14
The upper surface of the uppermost base material layer 20 (the side on which the adhesive layer is not formed) is subjected to a release treatment, for example, a peeling release treatment, in order to make it easier to pull out during use. Is desirable. In the masking tape of the present invention, the adhesive force of the film located below is made stronger than the adhesive force of the film located above. That is, FIG.
In the above, the adhesive strength of the adhesive layer 18 is made stronger than the adhesive strength of the adhesive layer 22.

In order to use such a masking tape of the present invention, it is sufficient to stick a predetermined length to a corresponding portion as in a normal masking tape. In this case, the adhesive layer of the lowermost film is Adheres to adherend. And when peeling off the masking tape, it is possible to peel off one by one while leaving the masking tape by peeling in order from those existing on the surface of the laminated structure, and finally all the masking tapes Can be removed. With such a masking tape of the present invention, it becomes the same as attaching a plurality of tapes in a single attaching operation, and each tape is inevitably adhered to exactly the same place. Become. Therefore, it means that a plurality of masking tapes are very easily attached to the same location. Further, when peeling, since the adhesive force becomes weaker as the film is positioned higher, the film can be peeled in order from the upper tape, thereby avoiding inconvenience such as peeling all at once.

Means for providing a difference in the adhesive strength include adjusting the material of the adhesive layer, partially providing the adhesive layer with respect to the base material layer, and adjusting the adhesive layer of the film positioned above the adhesive layer. This can be achieved by reducing the area, and such a means is preferable because the number of materials can be reduced. For example, in FIG. 4, the adhesive layer 18 of the lowermost film 12 is provided over the entire lower surface of the base material layer 16, and the adhesive layer 22 of the film 14 thereon is The adhesive layer 28 is provided on about 38% of the lower surface of the base material layer 26 in the uppermost film 24. By doing so, the adhesive strength of the adhesive layer is determined by the following equation: adhesive layer 18> adhesive layer 22>
It becomes the adhesive layer 28, and it becomes easy to peel off in order from the film located above. When the adhesive layer is partially provided on the base material layer, the adhesive layer may be formed in a linear shape as shown in FIGS. 2 and 3, or the adhesive layer 30 may be formed in an island shape as shown in FIG. For example, various means can be applied. But, among others,
By forming the tape linearly along the longitudinal direction of the tape, it becomes parallel to the direction of the force applied during the peeling operation, and the film can be easily peeled while the adhesive force is set high.

It is also desirable that the substrate layer be transparent and the adhesive layer be colored so that the adhesive layer can be seen from above the substrate layer. By changing the shape and / or color of the adhesive layer for each film and coloring the film, it is possible to determine the order of the uppermost film in the bonded state. For example, in advance, if the adhesive layer of the lowermost film is colorless, the adhesive layer of the second film is set to blue, and the third adhesive layer is set to yellow, if it is yellow at the time of confirmation, the peeling operation has been performed even once. It can be understood that there is no masking state, the state where the peeling operation has been performed only once in the case of blue, and that the remaining one masking tape exists in the case of the ground color. Also, for example, even if the color is the same, as shown in FIG. 4, when the shape of the adhesive layer is changed so that the number of the adhesive layers can be confirmed with a small number, a state in which the peeling operation has not been performed yet, a large number of When it can be confirmed by the above, it can be understood that the peeling operation has been performed only once, and when it can be confirmed that the masking tape is formed on the entire surface, the remaining one masking tape is present. Further, for example, after securing necessary adhesiveness, characters can be formed by an adhesive layer. For example,
If it is the second layer, the adhesive layer is formed in the form of “2, 2, 2,...” And the third layer is “3, 3, 3,. It is possible to easily determine what is. Here, the shape means a shape that can be grasped from the entire pressure-sensitive adhesive layer. In addition to the individual shape when partially formed, the same shape as the pressure-sensitive adhesive layers 22, 28 shown in FIG. Even if the pressure-sensitive adhesive layers differ depending on the number, density, etc., the shapes are also different. The color can be easily imparted to the pressure-sensitive adhesive layer by adding a pigment or the like to the material. The adhesive layer of the lowermost film is preferably colorless. This is because the adhesive directly adheres to the adherend, so that the influence on the adherend is surely prevented.

[0010] In addition, it is possible to determine the order of the uppermost film in the attached state by making the base material layer, instead of the adhesive layer, a different color for each film. For example, if the base material layer of the lowermost film is set in advance to red, the base material layer of the second film is set to blue, and the third base material layer is set to yellow, if it is yellow at the time of confirmation, the work is still performed once. It can be understood that the masking tape has not been removed, the state of blue has been peeled off once, and the state of red has one remaining masking tape. In addition, for each base material layer, characters, designs, and the like can be printed so as to indicate the order of the base layer. It should be noted that the color can be easily imparted to the base material layer by incorporating a pigment or the like into the material.

Further, it is desirable that the base layer of the masking tape is made of a woven fabric or a stretched tape that has been stretched at least in the transverse direction of the tape. For example, in the case of a woven fabric, a polyethylene yarn woven fabric or the like can be applied, and in the case of a stretched tape, a polyethylene biaxially stretched tape or the like can be applied. With such a base material layer, the tape is easily cut along the weft or in the drawing direction, so that the tape is easily cut by hand and the working efficiency is improved.

[0012]

EXAMPLE A masking tape having a width of 35 mm was produced in a laminated structure comprising two layers of films as shown in FIGS. For the base layers 16 and 20, a woven fabric made of low-density polyethylene yarn was used. However, the base material layer 16 was colored yellow, and the base material layer 20 was colorless and transparent. Also,
The upper surface of the base material layer 20 was subjected to a peeling release treatment. In addition, an acrylic adhesive was used for the adhesive layers 18 and 22. However, the adhesive layer 18 is formed on the entire lower surface of the base material layer 16, and the adhesive layer 22 is formed in a linear shape having a width of about 1.5 mm with respect to the lower surface of the base material layer 20 at intervals of about 1.5 mm. It was formed along the longitudinal direction. The adhesive layer 18 was colorless and transparent, and the adhesive layer 22 was colored blue. When this masking tape was adhered to a metal plate, a blue striped masking tape was visible from the surface. Then, by applying a force to peel off the film on the surface, only the film 14 is easily peeled off, and the entire surface of the film 1 is yellow.
2 was exposed and could be used as a masking tape. Thereafter, the film 12 was peeled off, so that nothing remained on the metal plate.

[0013]

By using the masking tape of the present invention,
This means that multiple masking tapes have been applied to the same location in one application, without increasing the number of processes.
And it is very easy. Therefore, the work efficiency of the coating operation is improved, and both the quality and productivity of the object to be coated can be improved. In addition, the films can be sequentially and easily peeled off from the surface of the masking tape, and mistakes such as peeling off a plurality of masking tapes that are stacked and adhered together can be prevented. Moreover, by adjusting the adhesive force according to the area of the adhesive layer, there is no need to use a plurality of types of adhesives,
Simple and cost reduction can be achieved. Also, by forming the adhesive layer linearly along the longitudinal direction of the tape,
Both high adhesive strength and easy peelability can be improved. further,
By coloring the adhesive layer and / or the base material layer, it is possible to visually recognize which layer of the masking tape is present on the surface, and after laminating and attaching a plurality of masking tapes, Forgetting peeling and excessive peeling can be prevented. Further, by forming the base material layer with a woven fabric or a stretched tape stretched at least in the transverse direction of the tape, the worker can easily cut the work by hand, and the construction efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a masking tape of the present invention.

FIG. 2 is a plan view of the masking tape.

FIG. 3 is a sectional view of the masking tape.

FIG. 4 is a sectional view showing an example of a masking tape having a three-layer structure.

FIG. 5 is a plan view showing an example of forming an adhesive layer.

[Explanation of symbols]

 Reference Signs List 10 masking tape 12 film 14 film 16 base layer 18 adhesive layer 20 base layer 22 adhesive layer 24 film 26 base layer 28 adhesive layer 30 adhesive layer

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuo Fukuchi 15 Asahi Gum Co., Ltd. 72) Inventor Koichi Koizumi 682-4 Honjuku, Tatebayashi-shi, Gunma F-term in Toyo Chemitech Co., Ltd.F-term (reference)

Claims (9)

[Claims] 1. A masking tape in which a plurality of films each comprising a base material layer and an adhesive layer are laminated, wherein the adhesive force of a film located below is higher than the adhesive force of a film located above. Characteristic masking tape. 2. The masking tape according to claim 1, wherein the adhesive layer has at least one film partially provided on the base material layer. 3. The masking tape according to claim 2, wherein the adhesive layer is formed linearly along the longitudinal direction of the tape. 4. The masking tape according to claim 2, wherein the shape of the adhesive layer of each film is different for each layer. 5. The masking tape according to claim 2, wherein the area of the adhesive layer of the lower film is larger than the area of the adhesive layer of the upper film. . 6. The masking tape according to claim 1, wherein at least one of the adhesive layers of the film is colored. 7. The masking tape according to claim 1, wherein the base layer of at least one or more films is colored. 8. The masking tape according to claim 1, wherein a woven fabric is used for the base material layer. 9. The masking tape according to claim 1, wherein a stretched tape stretched at least in a transverse direction of the tape is used for the base material layer.