Protective sheet

Abstract

This invention provides a protective sheet that prevents being blown away by wind, eliminates the need for tape and tape application, and also eliminates the need for release paper, thereby significantly shortening the protective covering work. [Solution] A roll-shaped protective sheet 1 with width W has end adhesive formation regions A1 (width 0.10W) and end adhesive formation region A5 (width 0.10W) at both ends, and a central adhesive formation region A3 (width 0.10W) at the center. Adhesive 2 is provided linearly within these end adhesive formation regions A1, A5, and A3, and the width wl of the linear adhesive 2 is set to 0.004W ≤ wl ≤ 0.014W.

Description

Technical Field

[0001] The present invention relates to a curing sheet used at construction sites, painting work, temporary work, during disasters, etc.

Background Art

[0002] Conventionally, when using a blue sheet or the like at a construction site or the like, the blue sheet was laid and fixed on the outside with an adhesive tape. However, this method was time-consuming and significantly reduced work efficiency.

[0003] On the other hand, various types have also been proposed as fixing tapes and the like.

[0004] For example, in Patent Document 1, there is a part with an adhesive and a part without an adhesive on an elastic sheet, and a base airtight adhesive tape having an adhesive in a partial region of the distance from one side edge to the other side edge of the elastic sheet is proposed as the elastic sheet extends from one side edge toward the other side edge.

[0005] Also, in Patent Document 2, an adhesive for fixing a protected body is formed on the back surface of a tape base material, an adhesive for fixing a protective sheet is provided on the substantially lower half surface of the tape base material, and a sheet fixing tape in which the substantially upper half surface of the tape base material does not have an adhesive is proposed.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] The airtight adhesive tape for foundations described in Patent Document 1 can simultaneously seal the sides and surface of the base and allows for easy adjustment of the installation position. However, it is not a protective sheet itself, and it has the problem of being difficult to peel off when applied to protective sheets such as blue tarpaulins.

[0008] Furthermore, the sheet fixing tape described in Patent Document 2 also had the problem that it was difficult to remove even when applied to protective sheets such as blue tarpaulins, and it was not suitable for use with protective sheets themselves. [Means for solving the problem]

[0009] As a result of diligently considering the aforementioned problems, the inventor has devised a protective sheet that prevents being blown away by the wind, eliminates the need for tape and release paper, and allows protective work to be completed in a short time.

[0010] In other words, the present invention provides a protective sheet having an adhesive on one side, wherein at least the left and right ends of the protective sheet have adhesive forming regions, and the adhesive is provided within the adhesive forming regions. [Effects of the Invention]

[0011] According to the protective sheet of this invention, it prevents the sheet from being blown away by the wind, eliminates the need for tape application, and also eliminates the need for release paper, thus significantly shortening the protective work time. [Brief explanation of the drawing]

[0012] The drawings illustrate specific embodiments of the present invention relating to this disclosure, including not only essential components of the invention but also optional and preferred embodiments. [Figure 1] This is a perspective view showing a protective sheet according to one embodiment of the present invention. [Figure 2] This is a plan view showing a protective sheet according to one embodiment of the present invention. [Figure 3]This is a plan view showing a protective sheet according to another embodiment of the present invention. [Figure 4] This is a plan view showing a protective sheet according to another embodiment of the present invention. [Figure 5] This is a plan view showing a protective sheet according to another embodiment of the present invention. [Figure 6] This is a plan view showing a protective sheet according to another embodiment of the present invention. [Figure 7] This is a side view showing a protective sheet according to another embodiment of the present invention. [Modes for carrying out the invention]

[0013] Embodiments of the present invention will be described in detail with reference to the drawings.

[0014] For example, the protective sheet according to this invention will be described as a roll-shaped sheet with a width W of approximately 100 mm and a length L of approximately 100 m. However, it is not limited to this, and protective sheets with widths of approximately 900 mm or 1800 mm and lengths of approximately 30 m or 50 m may also be used. Generally, protective sheets are made of polyethylene.

[0015] In addition, the thickness of protective sheets is generally indicated by a number, and there are various types of protective sheets such as #1000 (thickness d ≈ 0.10 mm), #2000 (thickness d ≈ 0.20 mm), #3000 (thickness d ≈ 0.25 mm), #4000 (thickness d ≈ 0.30 mm), and #5000 (thickness d ≈ 0.35 mm). However, it is not limited to these, and the thickest protective sheet with a thickness of d ≈ 1.0 mm may also be used.

[0016] Figure 1 shows a perspective view of a roll-shaped protective sheet 1 with a width of W mm according to one embodiment of the present invention. Adhesive 2 is provided in the adhesive-forming regions at both the left and right ends of the protective sheet 1.

[0017] Fig. 2 shows a partial plan view of a length of lm of a roll-shaped curing sheet 1 with a width of W mm. In this embodiment, end adhesive formation regions A1 (width 0.10W) and end adhesive formation regions A5 (width 0.10W) are provided at both left and right ends in the width direction.

[0018] And, from the viewpoint of preventing flapping by wind, as a more preferred embodiment, a central adhesive formation region A3 (width 0.10W) is further provided in the central portion.

[0019] In this embodiment, adhesive 2 is provided linearly in these end adhesive formation regions A1, end adhesive formation regions A5, and central adhesive formation region A3. Therefore, regions A2 and A4 where adhesive 2 is not provided each have a width of 0.35W.

[0020] If the width of the linear adhesive 2 is wl mm, then wl is preferably 0.004W ≤ wl ≤ 0.014W, more preferably 0.006W ≤ wl ≤ 0.012W, and even more preferably 0.008W ≤ wl ≤ 0.010W, from the viewpoints of the adhesive force during curing, preventing the sheets from sticking to each other when pulled out from the roll, and being re-peelable.

[0021] Fig. 3 shows a partial plan view of a length of lm of a roll-shaped curing sheet 1 with a width of W mm. In this embodiment, end adhesive formation regions A1 (width 0.10W) and end adhesive formation regions A5 (width 0.10W) are provided at both left and right ends in the width direction.

[0022] And, from the viewpoint of preventing flapping by wind, as a more preferred embodiment, a central adhesive formation region A3 (width 0.10W) is further provided in the central portion.

[0023] In this embodiment, adhesive 2 is provided in a strip shape in these end adhesive formation regions A1, end adhesive formation regions A5, and central adhesive formation region A3. Therefore, regions A2 and A4 where adhesive 2 is not provided each have a width of 0.35W.

[0024] If the width of the strip-shaped adhesive 2 is wb mm, then wb is preferably 0.05W ≤ wb ≤ 0.10W, more preferably 0.06W ≤ wb ≤ 0.09W, and even more preferably 0.07W ≤ wb ≤ 0.08W, from the viewpoint of adhesive strength during curing, preventing sheets from sticking together when pulled from the roll, and re-peelability.

[0025] Figure 4 shows a partial plan view of a portion of a roll-shaped protective sheet 1 with a width of W mm, with a length of lm. In this embodiment, end adhesive formation regions A1 (width 0.10 W) and A5 (width 0.10 W) are provided at both the left and right ends in the width direction.

[0026] Furthermore, in a more preferable embodiment, a central adhesive-forming region A3 (width 0.30W) is provided in the central part to prevent it from being blown away by the wind.

[0027] In this embodiment, one linear strip of adhesive 2 is provided within the end adhesive formation region A1 and the end adhesive formation region A5, while two linear strips of adhesive 2 are provided within the central adhesive formation region A3. Therefore, regions A2 and A4, where adhesive 2 is not provided, each have a width of 0.25W.

[0028] The width wl of the linear adhesive 2 is preferably 0.004W ≤ wl ≤ 0.014W, more preferably 0.006W ≤ wl ≤ 0.012W, and even more preferably 0.008W ≤ wl ≤ 0.010W, from the viewpoint of adhesive strength during curing, preventing sheets from sticking together when pulled from the roll, and re-peelability.

[0029] Figure 5 shows a partial plan view of a portion of a roll-shaped protective sheet 1 with a width of W mm, with a length of lm. In this embodiment, end adhesive formation regions A1 (width 0.10 W) and A5 (width 0.10 W) are provided at both the left and right ends in the width direction.

[0030] Furthermore, in a more preferable embodiment, a central adhesive-forming region A3 (width 0.10W) is provided in the central part to prevent it from being blown away by the wind.

[0031] In this embodiment, adhesive 2 is provided in a dotted manner within the end adhesive formation region A1, the end adhesive formation region A5, and the end adhesive formation region A3. Therefore, regions A2 and A4, where adhesive 2 is not provided, each have a width of 0.35W.

[0032] If the diameter of the dot-shaped adhesive 2 is φ mm, then φ is preferably 0.004 W ≤ φ ≤ 0.014 W, more preferably 0.006 W ≤ φ ≤ 0.012 W, and even more preferably 0.008 W ≤ φ ≤ 0.010 W, from the viewpoint of adhesive strength during curing, preventing sheets from sticking together when pulled from the roll, and re-peelability.

[0033] Furthermore, if the spacing between the dot-shaped adhesives 2 is t mm, then t is preferably 0 ≤ t ≤ 3.0φ, more preferably 0.5φ ≤ t ≤ 2.5φ, and even more preferably 1.0φ ≤ t ≤ 2.0φ, from the viewpoint of adhesive strength during curing, preventing the sheets from sticking together when pulled from the roll, and from the viewpoint of re-peelability.

[0034] Figure 6 shows a partial plan view of a portion of a roll-shaped protective sheet 1 with a width of W mm, with a length of lm. In this embodiment, end adhesive formation regions A1 (width 0.10 W) and A5 (width 0.10 W) are provided at both the left and right ends in the width direction.

[0035] Furthermore, in a more preferable embodiment, a central adhesive-forming region A3 (width 0.30W) is provided in the central part to prevent it from being blown away by the wind.

[0036] In this embodiment, adhesive 2 is provided linearly within the end adhesive formation region A1 and the end adhesive formation region A5, respectively, and adhesive 2 is provided in two dot-like rows within the central adhesive formation region A3. Therefore, regions A2 and A4, where adhesive 2 is not provided, each have a width of 0.25W.

[0037] The width wl of the linear adhesive 2 is preferably 0.004W ≤ wl ≤ 0.014W, more preferably 0.006W ≤ wl ≤ 0.012W, and even more preferably 0.008W ≤ wl ≤ 0.010W, from the viewpoint of adhesive strength during curing, preventing sheets from sticking together when pulled from the roll, and re-peelability.

[0038] The diameter φ of the dot-shaped adhesive 2 is preferably 0.004W ≤ φ ≤ 0.014W, more preferably 0.006W ≤ φ ≤ 0.012W, and even more preferably 0.008W ≤ φ ≤ 0.010W, from the viewpoint of adhesive strength during curing and preventing the sheets from sticking together when pulled from the roll.

[0039] Furthermore, the interval t between the dot-shaped adhesives 2 in the longitudinal direction is preferably 0 ≤ t ≤ 3.0φ, more preferably 0.5φ ≤ t ≤ 2.5φ, and even more preferably 1.0φ ≤ t ≤ 2.0φ, from the viewpoint of adhesive strength during curing, preventing sheets from sticking together when pulled from the roll, and from the viewpoint of re-peelability.

[0040] Furthermore, if the spacing between rows of dot-shaped adhesive 2 is wd mm, then wd is preferably 0 ≤ wd ≤ 3.0φ, more preferably 0.5φ ≤ wd ≤ 2.5φ, and even more preferably 1.0φ ≤ wd ≤ 2.0φ, from the viewpoint of adhesive strength during curing, preventing sheets from sticking together when pulled from the roll, and from the viewpoint of re-peelability.

[0041] As mentioned above, the shape of the adhesive 2 can be provided in the form of lines, strips, or dots, etc., from the viewpoint of providing adhesive strength when curing and preventing the sheets from sticking together when pulled from the roll, and these can also be combined as appropriate.

[0042] With the configuration described above, it is possible to provide an excellent protective sheet 1 that has improved adhesive strength during protective application, prevents sheets from sticking together when pulled from the roll, and can be easily peeled off like so-called masking tape.

[0043] Moreover, since release paper is not required, it is environmentally friendly and significantly reduces the time needed for masking and protection work.

[0044] Furthermore, as shown in Figure 7, from the viewpoint of further improving the adhesive strength during curing, it is also preferable to apply a primer 4 to the curing sheet body 3 and then apply a natural rubber-based or acrylic-based adhesive 2 on top of it. The primer is also called a base coat and is used for applications such as surface preparation and surface treatment.

[0045] Furthermore, from the viewpoint of further preventing the sheets from sticking together when pulled out from the roll, it is also preferable to provide the release agent 5 on the side of the protective sheet 1 opposite to the side on which the adhesive 2 is provided.

[0046] Thus, by making the protective sheet 1 a four-layer structure consisting of adhesive 2, primer 4, protective sheet body 3, and release agent 5, the adhesive strength during protective application can be further improved, and it also has the ability to further prevent the sheets from sticking together when pulled from the roll, while also providing an excellent protective sheet 1 that can be easily re-peeled off like so-called masking tape.

[0047] Moreover, since release paper is not required, it is environmentally friendly and significantly reduces the time needed for masking and protection work. [Explanation of Symbols]

[0048] 1. Protective sheet 2. Adhesive 3. Protective sheet body 4. Primer 5. Stripping agent A1 Edge adhesive formation area A5 Edge adhesive formation area A3 Central adhesive formation area

Claims

1. A protective sheet having an adhesive on one side, With respect to the width direction of the aforementioned protective sheet, at least the left and right ends are provided with end adhesive forming regions. A protective sheet characterized in that the adhesive is provided within the aforementioned adhesive-forming region at the end.

2. The protective sheet according to claim 1, wherein the width of the protective sheet is W, and the width of the edge adhesive formation region is 0.10W.

3. The protective sheet according to claim 2, wherein, in the width direction of the protective sheet, a central adhesive forming region is further provided in the central part with a width of 0.10 W or more and 0.30 W or less.

4. The protective sheet according to any one of claims 1 to 3, wherein the adhesive is provided in at least one of the following shapes when viewed from above: linear, strip-shaped, or dot-shaped.

5. The protective sheet according to any one of claims 1 to 3, wherein one side of the protective sheet is provided with a primer and an adhesive, and the other side is provided with a release agent.

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