JPS5821543A - Masking sheet for test panel - Google Patents

Abstract

PURPOSE:To provide a masking sheet which is convinient to handle and to facilitate positioning of the sheet from a test panel in the case of masking, by adhering together a surface to be tested of a test panel, a sheet material, having a cut in a similar shape to the outer shape of the surface to be tested and a mold release paper. CONSTITUTION:A part 3b, being of a simiar shape to that of a surface S to be tested, is peeled along a cut 5 in a masking sheet 2, and the part 3b is adhered to an opposite surface to the surface S to be tested of a test panel 1. A part 4b, being of a similar shape to the outer shape of the test panel 1, is separated along a cut 6, and the test panel 1 is placed in said part. A peripheral part 4c of a mold release sheet 4 is peeled to expose adhesive coating surfaces 3a of peripheral parts 3a and 3d of the sheet material 3, the long-side peripheral part 3c is bent to the back side of the test panel 1, and the end part is overlapped with the end part of the part 3b. The short-side peripheral part 3d of the sheet material is then bent to mask the whole back of the test panel 1.

Description

Detailed Description of the Invention The present invention provides a method for partially masking the test panel t 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 suitable masking sheet for test panels.

Conventionally, when masking the surface other than the tested surface of a test panel, there were two methods: (1) applying a masking paint to the masking part of the test panel by using a brush 41 or dipping, and (2) applying a masking paint along the masking part of the test panel. For example, methods such as sequentially pasting strips of adhesive tape 9 were taken.

However, when applying the mass young paint described in (2) above, it requires wax and odor from the applicator, it is difficult to obtain accurate masking dimensions, and it takes time to dry after application.
The coating yield is poor, masking is difficult to perform linearly, the state before the test cannot be determined,
When using the band-shaped adhesive tape described in (1) above, it is difficult to obtain accurate masking dimensions, the work of applying the band-shaped adhesive tape is complicated, and the yield rate of the band-shaped adhesive tape is poor. It had drawbacks such as:

Therefore, in order to eliminate the above-mentioned drawbacks, it is possible to separate a part of the test panel that is the same shape as the surface to be tested of the test panel to be masked, and the same shape part and the remaining part are used to separate all parts of the test panel other than the surface to be tested. The present applicant has already proposed a masking sheet for test panels, which has a shape that can be pasted to cover the surface of the test panel, and has a release paper pasted on the pasting surface.

According to this masking sheet, it is easy to obtain accurate masking dimensions without the need for special equipment during masking! Although it has the advantage of being able to provide a masking sheet for a test panel at a low price due to the high quality of the ski puffer material, it still has the problem that the positioning of the masking sheet for the test panel may become uneven if the positioning of the masking sheet is not uniform.

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. KToru, also known as Stone, is trying to provide masking sheets for mourning test panels.

The masking sheet for test panels according to the present invention is made by pasting release paper on a sheet material having an adhesive-coated surface.
The release paper 11i-eλ has a cut that allows separation of a portion having the same shape as the outer shape of the test panel to be subjected to kinging, and the sheet material has a cut that allows separation of the portion having the same shape as the surface to be tested of the test panel. It is characterized by

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 consisting of long sides and short sides, and has a required thickness. The surface surrounded by the virtual line t 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't sheet material 6 side, and FIG. The figure is a perspective view of the first skinning sheet 2 seen 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 6 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 6a. It is made by wearing clothes.

As the sheet material δ, 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 of this material, that is, in the state before use, and for masking. The surface to be attached to the test panel 1 is coated with, for example, a conventionally known adhesive to form an adhesive-coated surface 6a. Also, release paper 4
As a base paper, a mount having a brazing material cloth surface 4a that does not adhere to the adhesive may be formed on one side of the mount, and synthetic paper or the like may also be used as the mount.

The sheet material 6 has a cut 5 that allows separation of a portion 6b having the same shape as the surface S to be tested of the test panel 1 to be mass-younged. Additionally, the release paper 4 has a cut 6 that allows the portion 4b having the same shape as the test panel 1 to be separated. Further, at the four corners of the sheet material 6 and the release paper 4, notches 7m, 7 and 7e, 7d are formed so that the sheet material 60 can be easily bent at the peripheral edge portion later.

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

(1) One side of the test panel 10 is the exposed side (test side)
When using the masking sheet 2 as shown in FIG. S
Attach K to the opposite side (w skinning side) (see Figure 4). Next, as shown in FIG. 1, a portion 4b having the same shape as the test panel 1 is separated along the cut 6 of the masking sheet 2.

(Note that at this stage, part b in Figure 3 does not exist.) Next, after separating the above-mentioned portion 4b, the dead panel 1 is placed on this portion, and then, as shown in FIG. 3&, and then, as shown in FIG. 5, attach the long side-peripheral portion So, So of the peripheral portion of the sheet material 6 to the back side of the test panel 1, that is, the portion 6b having the same shape as the surface to be tested S. Bend it to the side that you cut, and overlap the end of it with the end of part b. Next, as shown in FIG. 6, the short side peripheral portion 6d of the sheet material 6 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 tested l1iiYs are masked more than the sheet material 6Vc, and this tested rfis is preliminarily applied to the sheet material of the masking sheet 2. 6, its contour is formed by the ninth cut 5, so its dimensions can be made very precise. In addition, since the positions of the cuts 5 provided in the sheet material and the cuts 6 provided in the release paper 4 are shifted, the shape of the masking sheet 2 can be easily maintained, and the complete cuts 5,
6, the peeling work during use can be made extremely easy. Of course, in the masking sheet 2 according to the present invention, each of the above-mentioned cuts 5 and 6 may be in the form of a serpentine cut.

In the above embodiment, as shown in FIG. 4, a case is shown in which the peripheral edge portion 4c of the release paper 4 is simultaneously peeled off from the sheet material 5, but as shown in FIG. The provided notch 6 is connected to each notch 7m, 7b, (7c), (7d
) so that the peripheral edge portions 4c of the discrete paper 40 can be individually peeled off from the sheet material 6 on each of the four sides.

(2) When both sides of the test panel 10 are exposed and used as surfaces (test surfaces), as shown in Figure 9, a portion of the same shape as the outer shape of the test panel 1 is formed along the cut 6 made in the shimagami paper 4. 4b, push the sheet material 6 from the back side of FIG. 9 with your fingers or the like, and simultaneously remove the test surface S of the test panel 1 and the same-shaped portion 6b along the cut 5 made in the sheet material 6. . In this state, the separated portion of the sheet material 6 is transparent, and at the same time, the adhesive portion 6 of the test panel 1-P
・is exposed. After that, place the test panel 1 on the part after removing the part 4b of the release paper 4, and then
As shown in the figure, after removing the peripheral edge portion 4ef of the release paper 40, as shown in FIG. As shown in FIG. 12, bend the short side peripheral portion d. Therefore, in the subsequent state, the test surface S shown in FIG. 7 and the test surface S shown in FIG. 13 are obtained on the surface opposite to the test surface S shown in FIG.

According to this embodiment, the exposed area can also be accurately tested on the test surface s.
, s' can be formed on both sides of the test panel 1. Furthermore, although complete cuts 5 and 6 can be formed from perforations, it is more preferable to form complete cuts than the above-mentioned 9.

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 has an outer shape of the test panel to be masked. Since the sheet material has a cut that allows the same-shaped portion to be separated from the test surface of the test panel, when attaching the masking sheet and the test panel, The test panel can be placed with the same partial pressure after peeling off the release paper of the same shape as the outer shape of the test panel from the masking sheet.9th, the positioning of the masking sheet and the test panel can be done extremely easily and quickly. 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, the surface opposite to the test surface is also formed, so that the exposure of the test panel is This method has very excellent effects such as making it possible to keep the area constant and making it possible to match the conditions especially when testing many test panels.

[Brief explanation of the drawing]

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. Figure 4 is an explanatory diagram of the situation in which the masking sheet) K test panel is pasted and the peripheral edge of the release paper is peeled off, and Figure 5 is the long side of the sheet material after the release paper is peeled off in Figure 4. An explanatory diagram showing the state after the side peripheral edge is bent. 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 after masking is completed. FIG. 8 is an explanatory diagram showing the four sides of the release paper with cuts that can be separated individually, and FIG. 9 is an illustration of the separation when forming test surfaces on both sides of the test panel. Figure 10 is an explanatory diagram of how the paper pattern and sheet material are peeled off. Figure 10 is an explanatory diagram of how the remaining paper in Figure 9 is peeled off. Figure 11 is an illustration of how the long side peripheral part of the sheet material in Figure 10 is folded. An explanatory diagram showing the state after bending, FIG. 12 is an explanatory diagram showing the state after the short side peripheral edge of the sheet material in FIG. 11 is fully bent,
FIG. 13 is a perspective view showing the back side of the test panel after finishing Mass Young.61--Test panel, 2--Mass Young sheet, δ-Sheet material, 3m-Adhesive coated surface, 6b...・A part with the same shape as the surface to be tested, 5a, S&''・Peripheral part, 4...Release paper, 4b-：A part with the same shape as the outer shape of the test panel, 4...Peripheral part, 5-・Cut, 6・
... cut, s, s', ... surface to be tested. Patent applicant: Nissan Motor Co., Ltd. Attorney Yutaka Oshio Figure 1 Figure 4-22 (Section 13

Claims (1)

[Claims] (1) A release paper is pasted on a sheet material having an adhesive-coated surface, and the release paper has cuts that allow separation of parts having the same shape as the outer shape of the test panel to be masked, and the sheet material is A masking sheet for a test panel, 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.