JPH0124255B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a test panel suitable for partially masking a test panel when conducting an environmental exposure test such as a corrosion resistance test, a weather resistance test, or an ozone resistance test using the test panel. This invention relates to a masking sheet for panels.

Conventionally, when masking areas other than the tested surface of a test panel, methods such as applying masking paint to the masking part of the test panel by brushing or dipping, or sequentially pasting strips of adhesive tape along the masking part of the test panel have been used. He had taken measures to attach it.

However, when applying the above-mentioned masking paint, application equipment is required;
It is difficult to obtain accurate masking dimensions, drying time is required after application, and the application yield is poor.
It has drawbacks such as difficulty in masking in a straight line and the inability to determine the state before the test. This method has disadvantages such as complicated pasting work and poor yield of adhesive tape strips.

Therefore, in order to eliminate the above-mentioned drawbacks, it is possible to separate a portion of the same shape from the surface to be tested of the test panel to be masked, and the same shape portion and the remaining portion cover all portions of the test panel except for the surface to be tested. The present applicant has already produced a masking sheet for test panels, which has a shape that can be pasted and has a release paper pasted on the pasting surface.
46444).

According to this masking sheet, no special equipment is required for masking, it is easy to obtain accurate masking dimensions, the yield of masking material is high, and it is possible to provide a low-cost masking sheet for test panels. Although there are advantages, there remains a problem in that the positioning of the adhesive on the test panel may become uneven.

This invention was made in view of the above-mentioned conventional problems, and aims to provide convenient handling, easy positioning between the test panel and the test panel during masking, and improved masking workability. The objective is to provide a good masking sheet for test panels.

The masking sheet for a test panel according to the present invention is made by pasting a release paper on a sheet material having an adhesive-coated surface, and the release paper has cuts that allow separation of parts having the same external shape as the test panel to be masked. In addition, the sheet material is characterized in that it has a cut that allows separation of a portion having the same shape as the surface to be tested of the test panel.

Embodiments of the present invention will be described in more detail below with reference to the drawings.

FIG. 1 is a perspective view showing the external appearance of a test panel 1 to be masked, and the illustrated example has a rectangular shape with long sides and short sides, and has a required thickness. The surface surrounded by the imaginary line l is the surface to be tested S. Further, a second surface to be tested may also be provided on the surface of the test panel 1 opposite to the surface to be tested S.

2 and 3 show a masking sheet for a test panel according to an embodiment of the present invention, FIG. 2 is a perspective view of the masking sheet 2 seen from the sheet material 3 side, and FIG. is a perspective view of the masking sheet 2 viewed from the release paper 4 side. That is, this masking sheet 2 is made by pasting a release paper 4 having the same shape as the sheet material 3 on a sheet material 3 which has a larger shape than the outer shape of the test panel 1 to be masked and has an adhesive coated surface 3a. It is made by wearing clothes.

As this sheet material 3, for example, a synthetic resin film material such as polyester or polyurethane can be used, and a release paper 4 is pasted on one side, that is, in a state before use, and a test is performed during masking. For example, a conventionally known adhesive is applied to the surface to be attached to the panel 1, and the adhesive-applied surface 3a is
Use the one that has been formed. Further, as the release paper 4, a mount having a brazing material coated surface 4a that does not adhere to the adhesive can be used on one side of a mount, and synthetic paper or the like can also be used as the mount.

The sheet material 3 has a cut 5 that allows separation of a portion 3b having the same shape as the surface S to be tested of the test panel 1 to be masked. Further, the release paper 4 has a portion 4b having the same shape as the outer shape of the test panel 1.
It has a cut 6 that allows it to be separated. moreover,
Cutouts 7a, 7b, 7c, and 7d are formed at the four corners of the sheet material 3 and the release paper 4 so that the sheet material 3 can be easily bent at the peripheral edge portion later.

Next, the process of masking the test panel 1 using the masking sheet 2 according to the present invention will be explained step by step.

(1) One side of test panel 1 is the exposed side (test side)
As shown in FIG. Attach it to the surface opposite to S (masking surface) (see Figure 4). next,
As shown in FIG. 3, a portion 4b having the same external shape as the test panel 1 is separated along the cut 6 of the masking sheet 2. (Note that at this stage, portion 3b in FIG. 3 does not exist.) Then,
After separating the portion 4b, the test panel 1 is placed on this portion, and then, as shown in FIG. After exposing the coating surface 3a, as shown in FIG.
Of the peripheral parts, the long side peripheral parts 3c and 3c are placed on the back side of the test panel 1, that is, the surface to be tested S.
The same-shaped portion 3b is bent toward the pasted side, and its end is overlapped with the end of the portion 3b. Next, as shown in FIG. 6, the short side peripheral portion 3d of the sheet material 3 is bent to mask the entire back surface of the test panel 1.

Therefore, in this state, as shown in FIG. 7, all parts of the test panel 1 except the surface to be tested S are masked by the sheet material 3, and this surface to be tested S is masked in advance by the masking sheet 2. Since its outline is formed by the cuts 5 made in the sheet material 3, its dimensions can be made very accurate. In addition, since the cut 5 made in the sheet material 3 and the cut 6 made in the release paper 4 are misaligned, the shape of the masking sheet 2 can be easily maintained, and the cut 5 and 6 made in the sheet material 3 can be easily maintained. Since it can be processed, peeling work during use can be done extremely easily. Of course, in the masking sheet 2 according to the present invention, the cuts 5 and 6 may be perforated.

In addition, in the above embodiment, as shown in FIG.
As shown in the figure, the cuts 6 provided in the release paper 4 are extended to the respective notches 7a, 7b, 7c, and 7d, so that the peripheral portion 4c of the release paper 4 can be individually peeled off from the sheet material 3 on each of the four sides. It can also be done.

(2) Both sides of test panel 1 are exposed surfaces (test surfaces)
When using the test panel 1 as shown in FIG. 9, first, when peeling off the part 4b having the same shape as the test panel 1 along the cut 6 made in the release paper 4, use your fingers or the like from the back side of the release paper 4. The sheet material 3 is pushed in and the test surface S of the test panel 1 and the same-shaped portion 3b are simultaneously removed along the cuts 5 made in the sheet material 3. In this state, the separated portion of the sheet material 3 is transparent, and at the same time, the adhesive margin portion 3e to the test panel 1 is exposed. After that, the test panel 1 is placed on the part after removing the part 4b of the release paper 4, and then, as shown in FIG. 10, after removing the peripheral part 4c of the release paper 4, as shown in FIG. The long side peripheral edge portions 3c, 3c of the sheet material 3 are bent toward the opposite side of the test panel 1, and then the short side peripheral edge portion 3d is bent as shown in FIG. Therefore, in the subsequent state, a test surface S shown in FIG. 7 and a test surface S' shown in FIG. 13 on the opposite side to this test surface S are obtained.

Also in this embodiment, test surfaces S and S' with accurate exposed areas can be formed on both sides of the test panel 1. Although the cuts 5 and 6 can be formed as complete cuts or perforations, it is more preferable to form them as complete cuts as described above.

As explained above, according to the masking sheet for test panels of the present invention, a release paper is attached to a sheet material having an adhesive-coated surface, and the release paper matches the outer shape of the test panel to be masked. Since the sheet material has a cut that allows the same-shaped parts to be separated, and the sheet material has a cut that allows the same-shaped part to be separated from the test surface of the test panel, when pasting the masking sheet and the test panel, With this method, the test panel can be placed in the same area as the outside of the test panel after peeling off the release paper from the masking sheet, making it extremely easy and quick to position the masking sheet and test panel. I can,
The test surface of the test panel is formed by removing the sheet material of the same shape as the test surface, and if necessary, it is also formed on the opposite side of the test surface, so the exposed area of the test panel is kept constant. It has very excellent effects such as being able to match the conditions especially when testing many test panels.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a test panel to be masked, and FIGS. 2 and 3 are perspective views of a masking sheet for a test panel according to an embodiment of the present invention, viewed from the sheet material side and from the release paper side, respectively. Fig. 4 is an explanatory diagram of the situation in which the peripheral edge of the release paper is peeled off after the test panel is attached to the masking sheet, and Fig. 5 is the long side periphery of the sheet material after the release paper is peeled off in Fig. 4. Figure 6 is an explanatory diagram showing the state after the short side peripheral edge of the sheet material in Figure 5 is bent. Figure 7 is a test after masking is completed. A perspective view showing the panel;
Figure 8 is an explanatory diagram of the state in which cuts have been formed to allow the four sides of the peripheral edge of the release paper to be separated individually, and Figure 9 is an illustration of the state of peeling of the release paper and sheet material when forming test surfaces on both sides of the test panel. An explanatory diagram, Fig. 10 is an explanatory diagram showing the situation in which the remaining release paper in Fig. 9 is peeled off, and Fig. 11 is an explanatory diagram showing the state after the long side peripheral part of the sheet material in Fig. , FIG. 12 is an explanatory view showing the state after the short side peripheral edge of the sheet material shown in FIG. 11 is bent, and FIG. 13 is a perspective view showing the back side of the test panel after masking is completed. 1... Test panel, 2... Masking sheet, 3... Sheet material, 3a... Adhesive application surface, 3
b... Part with the same shape as the surface to be tested, 3c, 3d... Peripheral part, 4... Release paper, 4b... Part with the same shape as the outer shape of the test panel, 4c... Peripheral part, 5... Cut, 6... Cut , S, S′ ₁ ... surface to be tested.

Claims (1)

[Claims] 1 Consisting of a release paper pasted on a sheet material having an adhesive-coated surface, the release paper has cuts that allow separation of parts of the same shape as the outer shape of the test panel to be masked, and the sheet material is used for the test panel. A masking sheet for a test panel, characterized in that it has a cut that allows separation of a portion of the same shape as the surface to be tested of the panel.