Masking tape and masking sheet

Abstract

To provide a masking sheet and a masking tape that enable easy gripping of a prime coating adhesive tape while maintaining adhesion to a coated surface.SOLUTION: A masking sheet 100 comprises: a sheet body 101 for covering a coated surface N; a finish coating adhesive tape 102 bonded along a sheet edge part 101a, which is an edge part of the sheet body 101, in the state expanding from the sheet edge part 101a; and a prime coating adhesive tape 105 which is bonded along an upper tape edge part 102a, which is an edge part of the finish coating adhesive tape 102, in the state expanding from the upper tape edge part 102a. In the prime coating adhesive tape 105, an upper tape side edge part 105b, which is an edge part on a side opposite to a lower tape expansion part 109, is thicker than the lower tape expansion part 109.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a masking tape and a masking sheet for covering surfaces that are not to be painted during painting work to prevent paint from adhering to the surfaces. [Background technology]

[0002] Conventionally, there have been masking tapes and masking sheets for covering surfaces that will not be painted during painting work to prevent paint from adhering. For example, Patent Document 1 listed below discloses a masking sheet in which a topcoat adhesive tape is attached to the edge of a sheet body that covers the surface that will not be painted in an overhanging state, and a primer adhesive tape is attached to the edge of the topcoat adhesive tape in an overhanging state. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-196857

[0004] However, the masking sheet described in Patent Document 1 is formed extremely thin to improve the adhesion of the undercoat adhesive tape to the uncoated surface, and part of this undercoat adhesive tape sticks to the topcoat adhesive tape, so that the two are in close contact, which creates the problem that the undercoat adhesive tape is difficult to grip and peel off from the topcoat adhesive tape.

[0005] The present invention has been made to address the above-mentioned problems, and its purpose is to provide a masking tape and masking sheet that can make it easier to grip the undercoat adhesive tape while maintaining adhesion to the surface to be painted. Summary of the Invention

[0006] In order to achieve the above-mentioned object, the present invention is characterized in that it comprises a topcoat adhesive tape that is attached to an unpainted surface, and an undercoat adhesive tape that is attached along the upper tape edge, which is the edge of the topcoat adhesive tape, in a state where it overhangs from the upper tape edge, and the undercoat adhesive tape is formed so that the thickness of the upper tape side edge, which is the edge on the opposite side to the lower tape overhang, is thicker than the lower tape overhang that overhangs from the upper tape edge.

[0007] According to this, the thickness of the lower tape overhanging portion of the masking tape that overhangs the edge of the upper tape is formed to be thicker than the thickness of the upper tape side edge, which is the edge on the opposite side of the lower tape overhanging portion. This makes it easier to grip the undercoat adhesive tape while maintaining adhesion to the surface of the object to be painted (hereinafter referred to as the "object surface").

[0008] Another feature of the present invention is that in the masking tape, the undercoat adhesive tape is formed thicker than the protruding portion of the lower tape by folding over the side edge of the upper tape.

[0009] According to this, the masking tape is formed thicker than the lower tape protruding portion by folding over the upper tape side edge portion of the undercoat adhesive tape, so the thickness of the upper tape side edge portion of the undercoat adhesive tape can be easily formed thicker. In this case, the end of the undercoat adhesive tape opposite the lower tape protruding portion can be folded back toward the uncoated surface or the adhesive surface to be attached to the topcoat adhesive tape to form the upper tape side edge portion. According to this, the masking tape can be coated with adhesive over the entire adhesive surface during production, which facilitates the work of coating the adhesive onto the adhesive surface.

[0010] Another feature of the present invention is that in the masking tape, the undercoat adhesive tape is formed to be more flexible than the topcoat adhesive tape.

[0011] According to this, the masking tape is formed so that the undercoat adhesive tape is more flexible than the topcoat adhesive tape, making it easier to grip the undercoat adhesive tape while ensuring better adhesion to the target surface than the topcoat adhesive tape.

[0012] Another feature of the present invention is that in the masking tape, the thickness of the undercoat adhesive tape at the protruding portion is thinner than the thickness of the topcoat adhesive tape.

[0013] According to this, the masking tape is formed so that the thickness of the undercoat adhesive tape protruding portion is thinner than the thickness of the topcoat adhesive tape, making it easier to grip the undercoat adhesive tape while ensuring better adhesion to the target surface than the topcoat adhesive tape.

[0014] Another feature of the present invention is that in the masking tape, the undercoat adhesive tape is neither transparent nor translucent and is of a different color from the topcoat adhesive tape.

[0015] According to this masking tape, the undercoat adhesive tape is not transparent or translucent and is constructed in a different color from the topcoat adhesive tape, so that when the undercoat adhesive tape is peeled off while the topcoat adhesive tape is attached to the target surface, the undercoat adhesive tape can be easily distinguished from the topcoat adhesive tape and can be easily grasped.

[0016] Another feature of the present invention is that in the masking tape, the undercoat adhesive tape is formed to have a tape width shorter than that of the topcoat adhesive tape.

[0017] According to this, the masking tape is formed so that the undercoat adhesive tape has a shorter tape width than the topcoat adhesive tape, and therefore the topcoat adhesive tape is clearly exposed underneath the undercoat adhesive tape, making it easy to distinguish the undercoat adhesive tape from the topcoat adhesive tape and easy to grip.

[0018] In order to achieve the above object, the present invention is characterized in that it comprises a topcoat adhesive tape that is attached to an unpainted surface, and an undercoat adhesive tape that is attached along the edge of the top tape, which is the edge of the topcoat adhesive tape, in a state where it extends beyond the edge of the top tape, and the undercoat adhesive tape is formed to be more flexible than the topcoat adhesive tape.

[0019] According to this masking tape, the undercoat adhesive tape is formed to be more flexible than the topcoat adhesive tape, making it easier to grip the undercoat adhesive tape while maintaining adhesion to the target surface.

[0020] Furthermore, the present invention can be implemented not only as a masking tape but also as a masking sheet.

[0021] Specifically, the masking sheet comprises a sheet body for covering the unpainted surface and a masking tape as described in any one of claims 1 to 7, and the masking tape is attached in such a manner that the top coat adhesive tape extends beyond the edge of the sheet body along the edge of the sheet.

[0022] According to this, the masking sheet can be expected to have the same effects as the masking tape invention described above. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view schematically illustrating an outline of the overall configuration of a masking sheet according to a first embodiment of the present invention. [Figure 2] 2 is a partial cross-sectional view schematically illustrating the configuration of the masking sheet shown in FIG. 1 in a state where it is adhered to a target surface. FIG. [Figure 3] 2 is a cross-sectional view showing a schematic process of using the masking sheet shown in FIG. 1 when painting. FIG. [Figure 4] FIG. 1 is a perspective view schematically illustrating the overall configuration of a masking tape according to a second embodiment of the present invention. [Figure 5] FIG. 5 is a partial cross-sectional view that schematically illustrates the outline of the configuration in a state where the masking tape shown in FIG. 4 is adhered to a target surface. [Figure 6] 5A to 5C are cross-sectional views schematically showing the process of using the masking tape and sheet body shown in FIG. 4 when painting. [Figure 7] 5 is a cross-sectional view showing a typical process of using only the masking tape shown in FIG. 4 for painting. [Figure 8] 8A to 8D are cross-sectional views schematically showing the process of use from FIG. 7D onwards in a painting job using only the masking tape shown in FIG. 7. [Figure 9] FIG. 10 is a partial cross-sectional view schematically illustrating the outline of the configuration of a masking sheet according to a modified example of the first embodiment of the present invention adhered to a target surface. [Figure 10] FIG. 10 is a partial cross-sectional view schematically illustrating the outline of the configuration of a masking tape according to a modified example of the second embodiment of the present invention adhered to a target surface. DETAILED DESCRIPTION OF THE INVENTION

[0024] First Embodiment A first embodiment of a masking sheet 100 according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a schematic overview of the overall configuration of the masking sheet 100 according to the first embodiment of the present invention. FIG. 2 is a partial cross-sectional view showing a schematic overview of the configuration of the masking sheet 100 shown in FIG. 1 when adhered to a target surface H. Note that the drawings referred to in this specification are schematic, with some components exaggerated, to facilitate understanding of the present invention. For this reason, the dimensions and ratios of the components may differ.

[0025] This masking sheet 100 is intended to cover the non-painted surface N, which is the surface that will not be painted, when painting a surface H to be painted (hereinafter referred to as "target surface H"), to prevent paint from adhering to it. Here, we will explain the painting work in which the masking sheet 100 is used. Normally, painting work is carried out by applying different paints in two stages, a primer coat and a top coat, in order to improve the adhesion of the paint to the painting surface S, which is the surface of the target surface H that will be painted.

[0026] The undercoating work is the work of applying a primer paint Pb to a coating surface S to increase the adhesion of the top coat paint Pt to the coating surface S. The top coat work is the work of applying a top coat paint Pt to the coating surface S after the primer paint Pb has hardened. In this case, in the top coat work, the top coat paint Pt is applied so as to cover the edge surfaces of the primer paint Pb applied to the coating surface S to prevent the edge surfaces from being exposed. As a result, the coating surface S is formed with a coating surface Sb to which only the primer paint Pb is applied and a coating surface St to which only the top coat paint Pt is applied.

[0027] (Configuration of masking sheet 100) As shown in FIG. 1, the masking sheet 100 mainly comprises a sheet body 101, an adhesive tape 102 for top coating, and an adhesive tape 105 for undercoating.

[0028] The sheet 101 is a flexible thin film for covering the non-coated surface N, which is composed of a flat or three-dimensional surface. The sheet 101 is made of a strip-shaped material selected from the group consisting of paper, nonwoven fabric, woven fabric, and resin, or a combination of these. In the first embodiment, the sheet 101 is made of a long polyester material having a length of 550 mm in the short side (width direction) and a thickness of 0.01 mm, which is folded along the short side (width direction) to form a strip-shaped sheet having a length of 45 mm in the short side (width direction).

[0029] 2, the topcoat adhesive tape 102 is a component for positioning the sheet member 101 on the uncoated surface N and for adhering to the uncoated surface N during the topcoat work to prevent paint from penetrating the uncoated surface N and form a boundary between the coated surface S and the uncoated surface N. The topcoat adhesive tape 102 is a flexible thin film, and is made of a strip-shaped material selected from the group consisting of paper, nonwoven fabric, woven fabric, and resin, or a combination of these materials.

[0030] In this first embodiment, the topcoat adhesive tape 102 is made by forming Japanese paper into a strip shape whose longitudinal length is the same as that of the sheet body 101 (the same length as the sheet edge portion 101a), whose short side (width direction) length is 18 mm, and whose thickness is 0.09 mm. The Japanese paper is formed so that its elongation (the ratio of the elongated length to the total length of the tape when the tape is stretched in the longitudinal direction and cut) is 8%.

[0031] Moreover, the overcoat adhesive tape 102 is not transparent or translucent but is colored, and in this first embodiment, is formed in an opaque purple color.

[0032] An adhesive portion 104 is formed on an inner surface 103 of this topcoat adhesive tape 102, which is the surface facing the non-coated surface N. The adhesive portion 104 is a portion that bonds and integrates the sheet body 101 and the topcoat adhesive tape 102, and is used to attach the topcoat adhesive tape 102 to the non-coated surface N and position the sheet body 101 on the non-coated surface N, and is formed over the entire surface of the inner surface 103.

[0033] The adhesive portion 104 is formed by applying a thin film of adhesive to the inner surface 103. The adhesive can remain in close contact with the non-coated surface N until the top coat paint Pt has cured appropriately, and can be peeled off from the non-coated surface N after the top coat paint Pt has cured. In the first embodiment, an adhesive synthesized primarily from acrylic ester, a so-called acrylic adhesive, is used for the adhesive portion 104. The adhesive portion 104 can also be formed by adhering a double-sided tape coated with an adhesive to the inner surface 103.

[0034] A sheet edge portion 101a, which is one edge portion extending in the longitudinal direction of the sheet body 101, is attached to one end side in the short side direction of the adhesive portion 104. In the first embodiment, the sheet edge portion 101a of the adhesive portion 104 is attached to a portion of the adhesive portion 104 that is approximately one-third of the length in the short side direction from the one end side in the short side direction.

[0035] On the other hand, the adhesive portion 104 is formed so that the remaining portion excluding the portion where the sheet edge portion 101a is attached is exposed. In the first embodiment, the adhesive portion 104 is formed so that a portion of about two-thirds of the length in the short direction from the other end in the short direction is exposed.

[0036] That is, in this first embodiment, the topcoat adhesive tape 102 is formed so that a portion of 12 mm in the width direction is exposed from the other end in the short direction, and this portion is attached to and adheres to the non-coated surface N. The edge portion extending in the longitudinal direction of the exposed portion of this topcoat adhesive tape 102 corresponds to the top tape edge portion 102a according to the present invention.

[0037] The adhesive tape for priming 105 is a member that adheres to the surface St to be painted during the priming process, thereby preventing the paint from penetrating the surface St and forming a boundary between the surface Sb and the surface St. The adhesive tape for priming 105 is a flexible thin film, and is made of a strip-shaped material selected from the group consisting of paper, nonwoven fabric, woven fabric, and resin, or a combination of these materials.

[0038] In the first embodiment, the undercoating adhesive tape 105 is made of Japanese paper formed into a strip shape with a longitudinal length equal to that of the sheet 101 (the same length as the sheet edge 101a), a transverse length of 20 mm, and a thickness of 0.09 mm. The undercoating adhesive tape 105 is formed to have an elongation percentage of 6%, and is made of a material with a lower elongation percentage than the topcoating adhesive tape 102, i.e., a material with lower flexibility.

[0039] In addition, the undercoating adhesive tape 105 is not transparent or semi-transparent and is colored, and in this first embodiment, is formed in an opaque orange color (reddish yellow). That is, the undercoating adhesive tape 105 is not transparent or semi-transparent and is a color different from that of the topcoating adhesive tape 102.

[0040] In this case, it is preferable to use colors that are opposite to each other for the topcoat adhesive tape 102 and the undercoat adhesive tape 105. Opposite colors are colors composed of complementary colors and colors similar to complementary colors, and are multiple hues (contrasting hues) arranged opposite the starting hue on the color wheel. Specifically, the contrasting hues are composed of a complementary hue arranged opposite the starting hue on the color wheel on a straight line, analogous hues arranged on both sides of the complementary hue and similar to the complementary hue, and multiple hues adjacent to the analogous hues and similar to the analogous hues. This undercoat adhesive tape 105 has an adhesive portion 107 formed on one side, the inner surface 106.

[0041] The adhesive portion 107 is a portion that releasably bonds the topcoat adhesive tape 102 and the undercoat adhesive tape 105 and temporarily fixes the undercoat adhesive tape 105 to the surface St to be painted, and is formed over the entire surface of the inner surface 106. This adhesive portion 107 can continue to adhere to the surface St to be painted and the topcoat adhesive tape 102 until the undercoat paint Pb has cured appropriately, and is formed by applying a thin film of adhesive to the inner surface 106, which can be peeled off from the surface St to be painted and the topcoat adhesive tape 102 after the undercoat paint Pb has cured.

[0042] In the first embodiment, an acrylic adhesive is used for adhesive portion 107. In this case, adhesive portion 104 and adhesive portion 107 may be formed using the same adhesive. Note that adhesive portion 107 may also be formed by adhering a double-sided tape coated with an adhesive to inner surface 106.

[0043] The topcoat adhesive tape 102 is attached to the adhesive portion 107, excluding a tab portion 108 formed at one end in the width direction of the undercoat adhesive tape 105 and a bottom tape overhang 109 formed at the other end in the width direction. In this case, the top tape edge portion 102a side of the top surface of the topcoat adhesive tape 102 opposite the inner surface 106 is attached to the adhesive portion 107. Specifically, the topcoat adhesive tape 102 is attached to the adhesive portion 107, excluding a portion 6 mm in the width direction from one end in the width direction (tab portion 108) and a portion approximately 1 to 3 mm in the width direction from the other end in the width direction (bottom tape overhang 109), a portion between the tab portion 108 and the bottom tape overhang 109, and having a width of approximately 5 to 7 mm.

[0044] At one end of the undercoat adhesive tape 105 in the short direction, a tab 108 is formed in a strip shape by folding one end of the short direction toward the inner surface 106 and bonding the opposing adhesive portions 107 together. In this first embodiment, the tab 108 is formed by folding in a portion approximately 6 mm in the width direction from one end of the short direction of the undercoat adhesive tape 105. In other words, the width of the tab 108 is approximately the same as the width of the portion of the adhesive portion 107 to which the topcoat adhesive tape 102 is attached. The bent portion of the tab 108 corresponds to the upper tape side edge 105b according to the present invention.

[0045] The gripping portion 108 causes the undercoating adhesive tape 105 to be shorter in the short side (width direction) than the topcoating adhesive tape 102, and in this first embodiment, it is formed in a strip shape with a short side (width direction) length of 14 mm. The edge of the undercoating adhesive tape 105 opposite the upper tape side edge 105b corresponds to the lower tape edge 105a according to the present invention.

[0046] Furthermore, a lower tape extension 109 is formed on the other end in the short direction of the undercoat adhesive tape 105, which extends from the upper tape edge 102a of the topcoat adhesive tape 102 and is attached to the surface St to be coated. In this first embodiment, the lower tape extension 109 is formed by extending from the upper tape edge 102a by approximately 1 to 3 mm in the width direction from the lower tape edge 105a, and is configured so that the exposed adhesive portion 107 comes into close contact with the surface St to be coated.

[0047] 1, the sheet body 101, the topcoat adhesive tape 102, and the undercoat adhesive tape 105 are wound around a core material 110 to form a roll body 111. In this case, the sheet body 101, the topcoat adhesive tape 102, and the undercoat adhesive tape 105 are adhered to each other with the sheet body 101 folded, to form a strip-like shape with a length in the short direction (width direction) of approximately 60 mm.

[0048] Here, a brief description will be given of a method for manufacturing the roll 111. The roll 111 is produced by simultaneously or sequentially adhering the top coating adhesive tape 102 to the sheet 101 and adhering the undercoat adhesive tape 105 to the top coating adhesive tape 102, followed by winding the roll 111 around a core 110. In this case, the undercoat adhesive tape 105 is attached to the top coating adhesive tape 102 and wound around the core 110 with one end in the short direction folded inward to form a tab 108. The top coating adhesive tape 102 and the undercoat adhesive tape 105 are wound around the core 110 with their respective adhesive portions 104, 107 attached to the outer surface of the core 110 and also attached to the upper surfaces of the top coating adhesive tape 102 and the undercoat adhesive tape 105 wound around the core 110.

[0049] (Operation of masking sheet 100) Next, the operation of the masking sheet 100 configured as described above will be described. First, before painting the object to be painted, the worker cleans the object surface H to improve adhesion between the object surface H, the paint, and the masking sheet 100. Specifically, the worker uses a high-pressure washer to spray high-pressure water onto the painted surface S and the unpainted surface N to wash away dirt or deteriorated paint adhering to the painted surface S and the unpainted surface N. In this case, the worker generally wears gloves to prevent paint from sticking to the skin or injuring the hands.

[0050] Next, the worker prepares the masking sheet 100. Specifically, the worker prepares a roll 111 in which the sheet 101, the topcoat adhesive tape 102, and the undercoat adhesive tape 105 are each wound around a core material 110.

[0051] Next, the worker places the masking sheet 100 on the dried target surface H. First, the worker unrolls the masking sheet 100 from the roll 111, as shown in FIG. 1. In this case, the worker places his or her fingers on the upper tape side edge 105b that forms a step on the surface of the roll 111, causing the gripping portion 108 to stand up on the topcoat adhesive tape 102. Next, the worker unrolls the masking sheet 100 from the roll 111 while pinching and lifting the standing gripping portion 108.

[0052] In this way, an operator can easily pull out masking sheet 100 from roll 111 by grasping and lifting gripping portion 108. Furthermore, since gripping portion 108 of masking sheet 100 is formed thick and forms a step on the surface of roll 111, an operator can easily grasp gripping portion 108 and pull out masking sheet 100 from roll 111 even when wearing gloves.

[0053] Next, the worker holds the unwrapped masking sheet 100 in one hand and the roll 111 in the other, applying appropriate tension in the longitudinal direction, and applies the masking sheet 100 to the target surface H. In this case, the worker applies the masking sheet 100 with the lower tape edge 105a of the lower tape protrusion 109 aligned along the boundary between the coating surface Sb and the coating surface St, as shown in FIG. 3( a). In this case, the adhesive portions 104 and 107 are exposed on the inner surfaces 103 and 106 of the topcoat adhesive tape 102 and the undercoat adhesive tape 105, respectively, that have been unwrapped from the roll 111. Therefore, the adhesive portion 104 adheres to the uncoated surface N, and the adhesive portion 107 adheres to the coating surface St, temporarily fixing the masking sheet 100 to the target surface H.

[0054] Next, the worker traces the topcoat adhesive tape 102 and the undercoat adhesive tape 105 of the masking sheet 100 positioned on the target surface H with his / her hands to make the topcoat adhesive tape 102 and the undercoat adhesive tape 105 adhere to the unevenness of the target surface H. The worker then performs this procedure on all locations required to cover the non-coated surface N.

[0055] Next, the worker unfolds the folded sheet bodies 101 of each masking sheet 100 located on the target surface H to cover the non-coated surface N. Specifically, the worker connects adjacent sheet bodies 101 with a fastener such as tape and covers the non-coated surface N with the sheet bodies 101 to the extent that paint does not adhere to the non-coated surface N.

[0056] Next, the worker applies a primer paint Pb to the surface Sb to be painted, as shown in FIG. 3(b). First, the worker prepares the primer paint Pb. Specifically, the worker obtains an appropriate primer paint Pb for the surface Sb to be painted from among commercially available primer paints. Next, the worker applies the obtained primer paint Pb to the surface Sb to be painted using a tool such as a brush, roller, or spray gun.

[0057] Next, after the undercoat paint Pb has dried until it has cured appropriately, the worker, wearing gloves, grips the gripping portion 108 of the undercoat adhesive tape 105 and peels off the undercoat adhesive tape 105. Specifically, as shown in FIG. 3(c), the worker places his or her fingers on the upper tape side edge 105b of the undercoat adhesive tape 105 to raise the gripping portion 108 above the topcoat adhesive tape 102. Next, the worker, while gripping the raised gripping portion 108, lifts the undercoat adhesive tape 105 and peels it off from the coating surface St and the topcoat adhesive tape 102. As a result, the undercoat adhesive tape 105 forms an edge of the undercoat paint Pb along the lower tape edge 105a at the boundary between the coating surface Sb and the coating surface St, as shown in FIG. 3(d).

[0058] Next, as shown in FIG. 3(e), the worker peels off the undercoat adhesive tape 105 and applies a topcoat paint Pt to the exposed surface St. First, the worker prepares the topcoat paint Pt. Specifically, the worker obtains a commercially available topcoat paint. Next, the worker applies the obtained topcoat paint Pt to the surface St using a tool such as a brush, roller, or spray gun. As a result, the worker covers the edges of the undercoat paint Pb formed in the undercoat work with the topcoat paint Pt.

[0059] Next, the worker allows the top coat paint Pt to dry until it is appropriately cured, and then, while wearing gloves, peels the top coat adhesive tape 102 from the uncoated surface N. Specifically, the worker picks up and lifts up the base portion where the top coat adhesive tape 102 and the sheet member 101 are adhered, thereby peeling the top coat adhesive tape 102 from the uncoated surface N. As a result, the top coat adhesive tape 102 forms an end of the top coat paint Pt at the boundary between the coated surface St and the uncoated surface N along the upper tape edge portion 102a, as shown in FIG. 3(f).

[0060] As can be understood from the above operation description, according to the above embodiment, the masking sheet 100 is formed so that the thickness of the lower tape extension portion 109 that extends from the upper tape edge portion 102a of the undercoat adhesive tape 105 attached on the topcoat adhesive tape 102 is thicker than the thickness of the upper tape side edge portion 105b, which is the edge on the opposite side to the lower tape extension portion 109, making it easier to grip the undercoat adhesive tape 105 while maintaining adhesion to the painted surface St.

[0061] Second Embodiment Next, a masking tape 200 according to a second embodiment of the present invention will be described with reference to Figures 4 to 8. The masking tape 200 is intended to prevent paint from adhering to an unpainted surface N when painting a target surface H, and is attached to the target surface H alone or with a sheet member 190 attached to a portion of the masking tape 200 that covers the unpainted surface N, to form a boundary between the painted surface S and the unpainted surface N.

[0062] In the description of this second embodiment, the differences from the first embodiment will be mainly described, and common parts will be denoted by common reference numerals and their description will be omitted as appropriate. The masking tape 200 according to this second embodiment differs from the masking sheet 100 according to the first embodiment in that the sheet member 101 is omitted.

[0063] Here, the sheet 190 corresponds to the sheet 101 in the first embodiment, and is made of a flexible thin film for covering the non-coated surface N, which is made of a flat or three-dimensional surface. The sheet 190 is made of any one of paper, nonwoven fabric, woven fabric, and resin, or a combination of these, formed into a size sufficient to cover the non-coated surface N. In the second embodiment, the sheet 190 is formed to be the same size as the sheet 101. In this case, the sheet 190 is wound around a core material (not shown) to form a roll (not shown).

[0064] (Masking Tape 200 Composition) 4, the masking tape 200 mainly comprises a topcoat adhesive tape 202 and an undercoat adhesive tape 205. The topcoat adhesive tape 202 and the undercoat adhesive tape 205 correspond to the topcoat adhesive tape 102 and the undercoat adhesive tape 105 in the first embodiment, respectively. Therefore, the topcoat adhesive tape 202 and the undercoat adhesive tape 205 will be described in terms of the differences from the topcoat adhesive tape 102 and the undercoat adhesive tape 105, respectively, and a description of the common parts will be omitted.

[0065] The topcoat adhesive tape 202 is a member for positioning the sheet member 190 on the uncoated surface N and for adhering to the uncoated surface N during the topcoat operation to prevent paint from penetrating the uncoated surface N and form a boundary between the coated surface S and the uncoated surface N. As shown in Fig. 5, this topcoat adhesive tape 202 has an adhesive portion 204 formed thereon, which corresponds to the adhesive portion 104 in the first embodiment.

[0066] The adhesive portion 204 is a portion for adhering and holding the sheet body 190 to the topcoat adhesive tape 202, and for adhering the topcoat adhesive tape 202 to the non-coated surface N to position the sheet body 190 on the non-coated surface N. This adhesive portion 204 is formed over the entire surface of the inner surface 203, which corresponds to the inner surface 103 in the first embodiment, and is configured to have a sheet body adhering portion 204a and a non-coated surface adhering portion 204b.

[0067] The sheet attachment portion 204a is a portion to which the sheet 190 is attached, and is formed on one end side in the short side direction of the adhesive portion 204. In the second embodiment, the sheet attachment portion 204a is formed and exposed in a portion approximately one-third (approximately 6 mm) of the short side length from one end side in the short side direction of the adhesive portion 204, and a sheet edge portion 190a, which is one edge portion extending in the longitudinal direction of the sheet 190, is attached to the sheet attachment portion 204a.

[0068] The non-coated surface attachment portion 204b is a portion that adheres and sticks to the non-coated surface N, and is formed on the other short-side end side of the adhesive portion 204. In the second embodiment, the non-coated surface attachment portion 204b is formed and exposed in a portion that is about two-thirds (about 12 mm) of the short-side length from the other short-side end of the adhesive portion 204, and is attached to and in close contact with the non-coated surface N. The edge of this non-coated surface attachment portion 204b on the opposite side to the sheet attachment portion 204a side corresponds to the upper tape edge portion 202a according to the present invention.

[0069] The undercoat adhesive tape 205 is formed with an adhesive portion 207 and a gripping portion 208 that correspond to the adhesive portion 107 and the gripping portion 108 in the first embodiment, respectively.

[0070] The gripping portion 208 is formed by folding back so that the upper tape side edge 205b, which corresponds to the upper tape side edge 105b in the first embodiment, is positioned to coincide with the end of the sheet body attachment portion 204a side of the non-coated surface attachment portion 204b.

[0071] The topcoat adhesive tape 202 and the undercoat adhesive tape 205 are wound around a core material 210 to form a roll body 211. In this case, the topcoat adhesive tape 202 and the undercoat adhesive tape 205 are adhered to each other and formed into a strip shape with a length in the short side direction (width direction) of approximately 20 mm.

[0072] Here, a brief description will be given of a method for manufacturing the roll 211. The roll 211 is produced by adhering the undercoat adhesive tape 205 to the topcoat adhesive tape 202, and then winding the integrated tape body of the topcoat adhesive tape 202 and the undercoat adhesive tape 205 around the core material 110. In this case, the undercoat adhesive tape 205 is adhered to the topcoat adhesive tape 202 and wound around the core material 210 while one end in the short direction is folded inward to form a tab portion 208. In this case, the topcoat adhesive tape 202 and the undercoat adhesive tape 205 are wound around the core material 210 with their respective adhesive portions 204, 207 attached to the outer surface of the core material 210 and also attached to the upper surfaces of the topcoat adhesive tape 202 and the undercoat adhesive tape 205 wound around the core material 210.

[0073] (Masking Tape 200 Operation) Next, the operation of the masking tape 200 configured in this manner will be described. The masking tape 200 can be used for painting work with the sheet member 190 attached or by itself. First, the case where painting work is performed using the sheet member 190 and the masking tape 200 will be described below. In this case, the worker can place the sheet member 190 and the masking tape 200 on the target surface H using three installation methods.

[0074] (Installation method 1) Specifically, the worker can attach the sheet 190 to the masking tape 200 to form an integrated tape body, which is then placed on the target surface H (hereinafter referred to as "placement method 1"). In this case, the worker first cleans the target surface H in the same manner as for the masking sheet 100. Next, the worker prepares the sheet 190 and the masking tape 200. Specifically, the worker prepares a roll on which the sheet 190 is wound, and a roll 211 on which the topcoat adhesive tape 202 and the undercoat adhesive tape 205 are wound around core materials 210, respectively.

[0075] Next, the worker cuts out the sheet 190 and the masking tape 200 from the roll 211 around which the prepared sheet 190 is wound, in the length and quantity required to cover the non-coated surface N. Specifically, the worker cuts out the masking tape 200 from the roll 211 according to the length and quantity of the cut sheet 190. In this case, the worker places his / her fingers on the upper tape side edge 205b that forms a step on the surface of the roll 211, and raises the gripping portion 208 on the topcoat adhesive tape 202. Next, the worker pulls out the desired length of masking tape 200 from the roll 211 while gripping and lifting the raised gripping portion 208, and cuts it off with scissors.

[0076] In this way, the worker can easily pull out the masking tape 200 from the roll 211 by grasping and lifting the gripping portion 208. Furthermore, the masking tape 200 has a thick gripping portion 208 that forms a step on the surface of the roll 211, so that the worker can easily grasp the gripping portion 208 and pull out the masking tape 200 from the roll 211 even when wearing gloves.

[0077] Next, the worker attaches the sheet body 190 to the masking tape 200. Specifically, the worker attaches the sheet body 190 to the masking tape 200 that has been placed on a flat surface with the adhesive portions 204, 207 facing upward so that the adhesive portions 204, 207 of the masking tape 200 do not stick to other objects. In this case, the worker places the portion of the prepared sheet body 190 on the sheet edge portion 190a side against the sheet body attachment portion 204a of the placed masking tape 200, and adheres the sheet body 190.

[0078] Through these operations, the worker can attach and integrate the sheet body 190 to the masking tape 200 to produce the masking sheet 100. Thereafter, the worker places the integrated sheet body 190 and masking tape 200 on a dried target surface H in the same manner as the masking sheet 100 in the first embodiment, and begins the painting work.

[0079] (Installation method 2) Also, unlike installation method 1, the worker can install the sheet body 190 and the masking tape 200 on the target surface H by attaching the sheet body 190 to the masking tape 200 that has been installed on the target surface H (hereinafter referred to as "installation method 2"). In this case, the worker first cleans the target surface H in the same way as with the masking sheet 100, and then prepares the sheet body 190 and the masking tape 200 in the length and quantity required to cover the unpainted surface N in the same way as with installation method 1.

[0080] Next, the worker places the masking tape 200 on the dried target surface H. Specifically, the worker holds one end in the longitudinal direction of the prepared masking tape 200 with one hand and the other end in the same longitudinal direction with the other hand, and applies an appropriate amount of tension in the longitudinal direction to the masking tape 200, thereby attaching the masking tape 200 to the target surface H.

[0081] 6(a), the worker applies the masking tape 200 to the uncoated surface N while aligning the lower tape edge 205a of the lower tape protruding portion 209 along the boundary between the coated surface Sb and the coated surface St, and separating the sheet body attachment portion 204a from the uncoated surface N so as not to adhere to the uncoated surface N. As a result, the uncoated surface attachment portion 204b of the masking tape 200 adheres to the uncoated surface N, and the adhesive portion 207 extending from the upper tape edge 202a adheres to the coated surface St, so that the masking tape 200 is temporarily fixed to the target surface H.

[0082] Next, the worker attaches the sheet 190 to the masking tape 200. Specifically, the worker holds one longitudinal end of the prepared sheet 190 with one hand and the other longitudinal end with the other hand, and applies appropriate tension in the longitudinal direction to the sheet 190 on the surface to be coated N. In this case, the worker applies the sheet 190 with the sheet edge 190a aligned with the base of the sheet attachment portion 204a (the end of the sheet attachment portion 204a on the side of the portion to be coated 204b) that stands upright on the surface to be coated N, as shown in FIG. 6(b).

[0083] Next, as shown in Fig. 6(c), the worker tilts the sheet member attachment portion 204a standing on the non-coated surface N toward the sheet member 190, and adheres the sheet member attachment portion 204a to the upper surface of the sheet member 190 on the sheet edge portion 190a side. In this way, the worker can produce the masking sheet 100 by attaching and integrating the sheet member 190 to the masking tape 200. Thereafter, the worker starts painting work using this sheet member 190 and masking tape 200 in the same manner as with the masking sheet 100 in the first embodiment.

[0084] (Installation method 3) Furthermore, unlike Installation Method 1 and Installation Method 2, two workers can simultaneously install the sheet 190 and the masking tape 200 on the target surface H (hereinafter referred to as "Installation Method 3"). In this case, the workers first clean the target surface H in the same way as with the masking sheet 100, and then, in the same way as with Installation Method 1 and Installation Method 2, prepare the sheet 190 and the masking tape 200 in the length and quantity required to cover the unpainted surface N.

[0085] Next, the workers place the sheet body 190 and the masking tape 200 on the dried target surface H. Specifically, while one worker applies the sheet body 190 to the target surface H, the other worker attaches the masking tape 200 to the non-painted surface N and to a portion of the applied sheet body 190, thereby placing the sheet body 190 and the masking tape 200 on the target surface H.

[0086] In this case, the one worker holds one longitudinal end of the sheet 190 with one hand and the other longitudinal end with the other hand, and applies appropriate tension in the longitudinal direction while applying it to the target surface H. More specifically, the one worker positions the sheet 190 so that the sheet edge 190a of the sheet 190 is positioned at a distance from the boundary between the coated surfaces Sb and St, which is a gap for applying the masking tape 200. Here, the gap for applying the masking tape 200 is the distance from the lower tape edge 205a of the masking tape 200 to the end of the non-coated surface application portion 204b on the sheet application portion 204a side.

[0087] The other worker holds one longitudinal end of the masking tape 200 with one hand and the other longitudinal end with the other hand, and applies appropriate tension in the longitudinal direction while applying the masking tape 200 to the target surface H. In this case, the other worker aligns the lower tape edge 205a along the boundary between the coated surfaces Sb and St, and applies the masking tape 200 to the target surface H and the sheet 190 so that the sheet application portion 204a is in contact with the upper surface of the sheet 190 on the sheet edge 190a side.

[0088] This allows workers to attach and integrate the sheet body 190 to the masking tape 200 to create the masking sheet 100. After that, workers start painting work using the sheet body 190 and the masking tape 200 in the same way as with the masking sheet 100 in the first embodiment.

[0089] Next, a case where painting work is performed using only the masking tape 200 will be described. For example, when a worker performs painting work using a tool that is less likely to scatter paint, such as a brush or paintbrush, or when the surface N to be painted can be covered with the masking tape 200, the masking tape 200 alone can prevent paint from adhering to the surface N to be painted. In this case, the worker cleans the target surface H in advance, as in the case where the sheet 190 and masking tape 200 are used. Next, the worker prepares the masking tape 200. Specifically, the worker prepares a roll 211 in which the topcoat adhesive tape 202 and the undercoat adhesive tape 205 are wound around a core material 210.

[0090] Next, the worker places the masking tape 200 on the dried target surface H. First, the worker unrolls the masking tape 200 from the roll 211. In this case, the worker places his or her fingers on the upper tape side edge 205b that forms a step on the surface of the roll 211, causing the gripping portion 208 to stand up on the topcoat adhesive tape 202. Next, the worker unrolls the masking tape 200 from the roll 211 while pinching and lifting the standing gripping portion 208.

[0091] In this way, the worker can easily pull out the masking tape 200 from the roll 211 by grasping and lifting the gripping portion 208. Furthermore, the masking tape 200 has a thick gripping portion 208 that forms a step on the surface of the roll 211, so that the worker can easily grasp the gripping portion 208 and pull out the masking tape 200 from the roll 211 even when wearing gloves.

[0092] Next, the worker holds the unwound masking tape 200 in one hand and the roll 211 in the other, applying appropriate tension in the longitudinal direction, and applies the masking tape 200 to the target surface H. In this case, the worker applies the masking tape 200 with the lower tape edge 205a of the lower tape protruding portion 209 aligned along the boundary between the coating surface Sb and the coating surface St, as shown in FIG. 7( a). In this case, the adhesive portions 204 and 207 are exposed on the inner surfaces 203 and 206 of the topcoat adhesive tape 202 and the undercoat adhesive tape 205 unwound from the roll 211, respectively. Therefore, the adhesive portion 204 adheres to the uncoated surface N, and the adhesive portion 207 adheres to the coating surface St, temporarily fixing the masking tape 200 to the target surface H.

[0093] Next, the worker traces the topcoat adhesive tape 202 and the undercoat adhesive tape 205 of the masking tape 200 positioned on the target surface H with his / her hand, so that the topcoat adhesive tape 202 and the undercoat adhesive tape 205 adhere to the unevenness of the target surface H. The worker then performs this procedure on all locations necessary to prevent paint from adhering to the uncoated surface N.

[0094] In this way, when the masking tape 200 is used alone, the topcoat adhesive tape 202 covers the non-coated surface N and plays the same role as the sheet member 101 in the first embodiment. Therefore, the topcoat adhesive tape 202 is preferably formed with a width and length that can cover the non-coated surface N and protect the non-coated surface N from paint that spills over or splashes onto the non-coated surface N during painting.

[0095] Specifically, the topcoat adhesive tape 202 can be formed to a width corresponding to the painting method, such as with a paintbrush, a paintbrush, a roller, or a spray gun, or a width corresponding to the size of the surface N not to be painted. The topcoat adhesive tape 202 can also be formed to a width shorter than the length required to protect the surface N not to be painted. In this case, the worker can apply multiple masking tapes 200 one on top of the other to cover the surface N not to be painted and prevent paint from adhering to it.

[0096] Next, the worker applies a primer paint Pb to the surface Sb to be painted, as shown in FIG. 7(b). First, the worker prepares the primer paint Pb. Specifically, the worker obtains an appropriate primer paint Pb for the surface Sb to be painted from among commercially available primer paints. Next, the worker applies the obtained primer paint Pb to the surface Sb to be painted using a tool such as a paintbrush or a writing brush.

[0097] Next, after the undercoat paint Pb has dried until it has cured appropriately, the worker, wearing gloves, grips the gripping portion 208 of the undercoat adhesive tape 205 and peels off the undercoat adhesive tape 205. Specifically, as shown in FIG. 7(c), the worker places his / her fingers (not shown) around the upper tape side edge 205b of the undercoat adhesive tape 205 to raise the gripping portion 208 above the topcoat adhesive tape 202. Next, the worker, while gripping the raised gripping portion 208, lifts the undercoat adhesive tape 205 and peels it off from the surface St to be coated and from the topcoat adhesive tape 202. As a result, the undercoat adhesive tape 205 forms an edge of the undercoat paint Pb along the lower tape edge 205a at the boundary between the surfaces Sb and St to be coated, as shown in FIG. 7(d).

[0098] Next, as shown in FIG. 8(a), the worker peels off the undercoat adhesive tape 205 and applies the topcoat paint Pt to the exposed surface St. First, the worker prepares the topcoat paint Pt. Specifically, the worker obtains a commercially available topcoat paint. Next, the worker applies the obtained topcoat paint Pt to the surface St using a tool such as a paintbrush. As a result, the edges of the undercoat paint Pb formed in the undercoat work are covered with the topcoat paint Pt.

[0099] Next, the worker allows the top coat paint Pt to dry until it is appropriately cured, and then, while wearing gloves, peels the top coat adhesive tape 202 from the uncoated surface N. Specifically, as shown in FIG. 8(b), the worker peels off the top coat adhesive tape 202 from the uncoated surface N by turning up the end of the top coat adhesive tape 202 opposite the portion of the top tape edge 202a on which the top coat paint Pt is applied. As a result, the top coat adhesive tape 202 forms an end of the top coat paint Pt at the boundary between the coated surface St and the uncoated surface N along the upper tape edge 202a, as shown in FIG. 8(c).

[0100] As can be understood from the above description of operation, according to the second embodiment, the masking tape 200 is formed such that the thickness of the lower tape protruding portion 209 that protrudes from the upper tape edge portion 202a of the undercoat adhesive tape 205 is thicker than the thickness of the upper tape side edge portion 205b. This allows the masking tape 200 to make it easier to grip the undercoat adhesive tape 205 while maintaining adhesion to the target surface H (paint surface St).

[0101] Furthermore, the present invention is not limited to the first or second embodiment described above, and various modifications are possible without departing from the object of the present invention.

[0102] For example, in the first and second embodiments, the undercoating adhesive tapes 105, 205 are formed so that the upper tape side edge portions 105b, 205b are thicker than the lower tape protrusion portions 109, 209. This allows the masking sheet 100 and the masking tape 200 to make the undercoating adhesive tapes 105, 205 easier to grip while maintaining adhesion to the target surface H (painting surface St).

[0103] However, the thickness of the lower tape protrusions 109, 209 of the undercoating adhesive tapes 105, 205 can also be formed to be the same as or thicker than the upper tape side edges 105b, 205b. In this case, the masking sheet 100 and the masking tape 200 can form the undercoating adhesive tapes 105, 205 to be more flexible than the topcoating adhesive tapes 102, 202. This allows the masking sheet 100 and the masking tape 200 to make the undercoating adhesive tapes 105, 205 easier to grip while maintaining adhesion to the target surface H (painting surface St).

[0104] Furthermore, in the first and second embodiments, the masking sheet 100 and the masking tape 200 are formed by folding back one end of the undercoating adhesive tape 105, 205 in the short direction to form the upper tape side edge 105b, 205b, so that the thickness of the upper tape side edge 105b, 205b is made thicker than the lower tape protruding portion 109, 209. This allows the masking sheet 100 and the masking tape 200 to easily form the upper tape side edge 105b, 205b of the undercoating adhesive tape 105, 205 to be thicker.

[0105] Furthermore, the masking sheet 100 and the masking tape 200 can have adhesive applied to the entire surface of the adhesive portions 107, 207 during manufacturing, which facilitates the application of adhesive to the adhesive portions 107, 207. However, the upper tape side edge portions 105b, 205b only need to be thicker than the lower tape protrusion portions 109, 209, and are not limited to the first and second embodiments.

[0106] 9 and 10, the masking sheet 100 and the masking tape 200 may be configured to have a thicker upper tape edge portion 105b, 205b by overlapping an undercoat adhesive tape 105, 205 of a different width and attaching it to the surface of one end of the undercoat adhesive tape 105, 205 in the short direction. Also, the masking sheet 100 and the masking tape 200 may have a thicker upper tape edge portion 105b, 205b by applying paint to the surface of the one end of the undercoat adhesive tape 105, 205.

[0107] Furthermore, in the first and second embodiments, the topcoat adhesive tapes 102, 202 are formed to be more flexible than the undercoat adhesive tapes 105, 205. This allows the topcoat adhesive tapes 102, 202 to adhere better to the target surface H than the undercoat adhesive tapes 105, 205, thereby enabling the sheet member 101, 190 to be reliably positioned on the target surface H. However, the undercoat adhesive tapes 105, 205 can be formed to be more flexible than the topcoat adhesive tapes 102, 202. This allows the masking sheet 100 and the masking tape 200 to make the undercoat adhesive tapes 105, 205 easier to grip while ensuring better adhesion of the undercoat adhesive tapes 105, 205 to the target surface H than the topcoat adhesive tapes 102, 202.

[0108] In this case, the undercoating adhesive tapes 105, 205 may be thinner than the topcoating adhesive tapes 102, 202, thereby making them more flexible than the topcoating adhesive tapes 102, 202. The undercoating adhesive tapes 105, 205 can also be made more flexible than the topcoating adhesive tapes 102, 202 by being made of a material with a higher elongation percentage than the topcoating adhesive tapes 102, 202. On the other hand, the undercoating adhesive tapes 105, 205 can also be made to have the same degree of flexibility as the topcoating adhesive tapes 102, 202.

[0109] Furthermore, in the first and second embodiments, the bottom tape extensions 109, 209 are formed to the same thickness as the topcoat adhesive tapes 102, 202. However, the bottom tape extensions 109, 209 can be formed to be thinner than the topcoat adhesive tapes 102, 202. This allows the masking sheet 100 and the masking tape 200 to ensure better adhesion of the undercoat adhesive tapes 105, 205 (bottom tape extensions 109, 209) to the target surface H than the topcoat adhesive tapes 102, 202, while making the undercoat adhesive tapes 105, 205 easier to grip. On the other hand, the bottom tape extensions 109, 209 can also be formed to be thicker than the topcoat adhesive tapes 102, 202.

[0110] Furthermore, in the first and second embodiments, the undercoat adhesive tapes 105, 205 are formed to have the same thickness as the topcoat adhesive tapes 102, 202. However, the undercoat adhesive tapes 105, 205 can be formed to be thinner than the topcoat adhesive tapes 102, 202. This allows the masking sheet 100 and the masking tape 200 to easily grip the undercoat adhesive tapes 105, 205 while maintaining adhesion to the topcoat adhesive tapes 102, 202 and the target surface H. On the other hand, the undercoat adhesive tapes 105, 205 can also be formed to be thicker than the topcoat adhesive tapes 102, 202.

[0111] Furthermore, in the first and second embodiments, the undercoat adhesive tapes 105, 205 are orange, not transparent or translucent, and are a different color from the purple topcoat adhesive tapes 102, 202. This allows the masking sheet 100 and the masking tape 200 to easily distinguish and grip the undercoat adhesive tapes 105, 205 from the topcoat adhesive tapes 102, 202 when peeling them off.

[0112] In this case, the masking sheet 100 and the masking tape 200 may be configured so that the colors of the topcoat adhesive tapes 102, 202 and the undercoat adhesive tapes 105, 205 are opposite to each other. By using opposite colors that make the masking sheet 100 and the masking tape 200 more vividly visible, the undercoat adhesive tapes 105, 205 can be more easily distinguished from the topcoat adhesive tapes 102, 202 and easier to grip.

[0113] However, the masking sheet 100 and the masking tape 200 may be configured such that the topcoat adhesive tapes 102, 202 and the undercoat adhesive tapes 105, 205 are of any color, regardless of whether they are transparent or translucent. Specifically, the masking sheet 100 and the masking tape 200 may be configured such that the topcoat adhesive tapes 102, 202 are an opaque yellow-green color and the undercoat adhesive tapes 105, 205 are a transparent yellow. Furthermore, the masking sheet 100 and the masking tape 200 may be configured such that the topcoat adhesive tapes 102, 202 and the undercoat adhesive tapes 105, 205 are the same transparency and / or color.

[0114] Furthermore, in the first and second embodiments, the undercoat adhesive tape 105, 205 is formed to have a shorter tape width than the topcoat adhesive tape 102, 202 by folding one end of the undercoat adhesive tape 105, 205 in the shorter direction toward the inner surface 106, 206. This allows the masking sheet 100 and the masking tape 200 to clearly expose the topcoat adhesive tape 102, 202 under the undercoat adhesive tape 105, 205, making the undercoat adhesive tape 105, 205 easy to distinguish from and grip the topcoat adhesive tape 102, 202. However, the masking sheet 100 and the masking tape 200 can also be formed so that the tape width of the undercoat adhesive tape 105, 205 is the same as or longer than the tape width of the topcoat adhesive tape 102, 202.

[0115] In the first and second embodiments, the sheet members 101, 190 are configured to be strip-shaped with a width of 550 mm when unfolded. However, the width and length of the sheet members 101, 190 can be formed to any length. The shape of the sheet members 101, 190 can also be formed to be a shape other than a strip, such as a polygonal shape such as a triangle, square, or hexagon, a circle, or an ellipse.

[0116] In the first and second embodiments, the sheet members 101, 190 are formed by folding a resin material into a belt-like shape. However, the sheet members 101, 190 may be formed by unfolding a resin material into a belt-like shape.

[0117] In the first and second embodiments, the topcoat adhesive tapes 102, 202 are configured as strips with a width of 18 mm. However, the width and length of the topcoat adhesive tapes 102, 202 can be formed to any length. The topcoat adhesive tapes 102, 202 can also be formed in shapes other than strips, such as polygons (e.g., triangles, squares, or hexagons), circles, or ellipses.

[0118] In the first and second embodiments, the undercoating adhesive tapes 105, 205 are configured as strips with a width of 20 mm before the gripping portion 108 is formed. However, the width and longitudinal lengths of the undercoating adhesive tapes 105, 205 can be formed to any length. The undercoating adhesive tapes 105, 205 can also be formed in shapes other than strips, such as polygons such as triangles, squares, and hexagons, circles, or ellipses.

[0119] In the second embodiment, when a painting operation is performed using the masking tape 200 together with the sheet member 190, the masking tape 200 is placed on the target surface H by the above-described placement methods 1 to 3. However, the masking tape 200 may be placed on the target surface H together with the sheet member 190 by a method other than the placement methods 1 to 3. [Explanation of symbols]

[0120] H...target surface, N: Unpainted surface, Pb...primer paint, Pt...top coat paint, S...painted surface, Sb...painted surface, St...painted surface, 100...masking sheet, 101...sheet body, 101a...sheet edge portion, 102... adhesive tape for top coating, 102a... upper tape edge, 103... inner surface, 104...adhesive portion, 105...undercoat adhesive tape, 105a...lower tape edge portion, 105b... upper tape side edge portion, 106... inner surface, 107... adhesive portion, 108... grip portion, 109...lower tape extension portion, 110...core material, 111...roll body, 190...sheet body, 190a...sheet edge portion, 200...masking tape, 202... adhesive tape for top coating, 202a... upper tape edge portion, 203... inner surface, 204...adhesive portion, 204a...sheet body attachment portion, 204b...non-coated surface attachment portion, 205...undercoat adhesive tape, 205a...lower tape edge, 205b...upper tape side edge, 206...inner surface, 207...adhesive portion, 208...grip portion, 209...lower tape protrusion portion, 210...core material, 211...roll body.

Claims

1. Topcoat adhesive tape that can be applied to unpainted surfaces; an undercoat adhesive tape attached along an edge of the upper tape, which is an edge of the overcoat adhesive tape, in a state of overhanging from the edge of the upper tape; The undercoat adhesive tape is This masking tape is characterized in that the thickness of the upper tape side edge, which is the edge opposite the lower tape overhanging portion that overhangs the upper tape edge, is formed to be thicker than the lower tape overhanging portion that overhangs the upper tape edge.

2. The masking tape according to claim 1, The undercoat adhesive tape is A masking tape characterized in that the upper tape side edge portion is folded over to form a thickness greater than that of the lower tape overhang portion.

3. The masking tape according to claim 1, The undercoat adhesive tape is The masking tape is characterized by being formed more flexible than the above-mentioned adhesive tape for topcoating.

4. The masking tape according to claim 1, The undercoat adhesive tape is A masking tape characterized in that the thickness of the lower tape overhanging portion is formed thinner than the thickness of the topcoat adhesive tape.

5. The masking tape according to claim 1, The undercoat adhesive tape is A masking tape that is neither transparent nor translucent and is constructed in a color different from that of the overcoat adhesive tape.

6. The masking tape according to claim 1, The undercoat adhesive tape is The masking tape is characterized in that it is formed to have a tape width shorter than that of the above-mentioned topcoat adhesive tape.

7. Topcoat adhesive tape that can be applied to unpainted surfaces; an undercoat adhesive tape attached along an edge of the upper tape, which is an edge of the overcoat adhesive tape, in a state of overhanging from the edge of the upper tape; The undercoat adhesive tape is The masking tape is characterized by being formed more flexible than the above-mentioned adhesive tape for topcoating.

8. a sheet body for covering an unpainted surface; and a masking tape according to any one of claims 1 to 7, The masking tape is The masking sheet is characterized in that the topcoat adhesive tape is attached along the edge of the sheet body, which is the edge of the sheet body, in a state where it extends beyond the edge of the sheet.

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