JPH0118214Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a masking tape whose back side can be peeled off.

Masking tape is used when spray painting the exterior and interior walls of buildings to protect the surfaces to be painted.

Conventionally, in painting the exterior and interior walls of buildings, window frames 1, which are the surfaces to be painted, have been painted, as shown in Figure 1a.
Masking tape 3 is applied from above through masking film 2, undercoat 4a is applied, topcoat 4b is applied, and after drying masking tape 3 is applied.
This was done by peeling off the .

However, as shown in FIG. 1b, this painting method has the disadvantage that when the masking tape 3 is peeled off, the coated end portions are also peeled off, so the undercoated end surface 5 is exposed and the appearance is not good.

In order to improve this problem, it is conceivable to paste two layers of masking tape 3 together and peel them off one after the other as the painting is done, but this would require the work of pasting the masking tape twice, and the long tape would have to be doubled. It is difficult to fit them together, and curing work on high scaffolding is difficult and work efficiency is extremely low.

Another option is to use a machine to apply two layers of tape, but not only is the machine large and difficult to work at high places, but using two layers of the same tape overlapping each other also makes the tape thicker. In addition, when the upper tape is peeled off, it is difficult to pull and unwind the lower tape.

The present invention was made in order to solve these conventional drawbacks, and the purpose is to provide a masking tape that is structured so that the back side of a single piece of masking tape is separated so that curing work can be easily performed. .

That is, the masking tape of the present invention is characterized in that the adhesive tape has an adhesive layer provided on the lower surface of the base layer, and the base layer is formed to be separable into two layers.

The details of the present invention will be explained below with reference to the drawings showing one embodiment.

Fig. 2 is an enlarged cross-sectional view of a masking tape showing one embodiment of the present invention, Fig. 3 is an enlarged cross-sectional view of a masking tape showing another example, and Fig. 4 is an explanatory cross-sectional view showing a state of use. .

In FIG. 2, the masking tape of the present invention has an adhesive layer 8 provided on the lower surface of a base layer 6 with an undercoat layer 7 interposed therebetween. A protective layer 10 is removably laminated on the upper surface of the protective layer 10 to form an integrated structure. In addition, the code|symbol 11 in the figure is a mold release layer when rolling.

In the present invention, the protective layer 10 is laminated on the upper surface of the base material main body layer 9 to constitute the base material layer 6 of one masking tape, and it is only lightly peeled off by pulling it off after undercoating without the paint drying. There is no particular limitation as long as the strength is as follows. That is, protective layer 1
0 is a material that easily peels off from the upper surface of the base material main body layer 9, such as polyethylene laminate that has poor laminate adhesion to the base material main body layer 9, an adhesive that easily separates from the base material main body layer 9, or an adhesive that adheres when absorbing water. It is made up of things that are bonded with a water-based adhesive that has weak strength and is easily peeled off, and things that are laminated with paper layers that have weak interlayer strength interposed therebetween.

Since the adhesive layer 8 may be attached to a rough surface, it is necessary to provide a certain amount of adhesive thickness in order to obtain adhesive strength. The adhesive layer 8 is not particularly limited as long as it is not easily attacked by water or solvents, but rubber adhesives, acrylic adhesives, urethane adhesives, silicone adhesives, etc. are preferably used. In particular, a rubber adhesive has good removability and requires a certain degree of thickness, so an adhesive layer using a rubber adhesive, especially re-rubber, is suitable.

Next, the base material body layer 9 is made of chemical fibers, woven fabrics made of long fibers, polyethylene, etc., but woven fabrics are suitable for holding the adhesive layer 8, which is not particularly limited.

The overall thickness of the masking tape of this invention is 140 ~
400μ, preferably 140-220μ is suitable. The thickness of the adhesive layer 8 is 40 to 200μ, preferably 80 to 130μ.
It is preferable that

FIG. 3 shows another embodiment of the present invention, in which the protective layer 10 is replaced by a peel-off adhesive layer or an aqueous adhesive layer 1.
2 is an example in which the base material main body layer 9 is laminated in a temporarily fixed state. When this protective layer 10 absorbs water, the layer 12 is easily peeled off from the base material main body layer 9, so that the coating finish can be improved.

Next, an example of the use of the present invention will be explained with reference to FIG.
In the figure, the same parts as in FIG. 1 are indicated by the same reference numerals.

The masking tape 3 with the protective layer 10 laminated on the upper surface of the base material body layer 9 is pasted along the window frame 1, which is the surface to be painted on the wall to be spray-painted, with the adhesive layer facing downward (Figure 5a). . Undercoat 4a is applied in this state, and after the protective layer 10 is slightly moistened in a semi-dry state, when the protective layer 10 is pulled, the protective layer 10 is lightly peeled off from the base material main layer 9 because the undercoat 4a is in a semi-dry state. (Figure 5b). After the undercoat 4a has dried, a topcoat 4b is applied (FIG. 5c), and when it dries and the base material main body layer 9 is peeled off together with the adhesive layer, a good-looking coating can be formed in which the undercoat end surface 5 is covered with the topcoat 4b (Fig. 5c). Figure 5 d).

As explained above, the base layer of the masking tape of the present invention easily separates into two layers, so you can hold the tape in the same way as when applying a single piece of masking tape.
Masking tape can be applied using the same unwrapping method, saving time during painting work and achieving an excellent paint finish.

In addition, it is less bulky than pasting using a conventional tape overlapping machine, and curing work is easier.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional painting process, FIG. 2 is an enlarged sectional view of a masking tape showing one embodiment of the present invention, FIG. 3 is a sectional view of a masking tape showing another example, and FIG. The figure is an explanatory diagram showing how the masking tape is used. 3... Masking tape, 6, 9... Base material layer,
7... Undercoat layer, 8... Adhesive layer, 9... Base material main body layer, 10... Protective layer, 11... Release layer, 12...
Anti-peel adhesive layer or water-based adhesive layer.

Claims (1)

[Claims for Utility Model Registration] (1) A masking tape comprising an adhesive layer provided on the lower surface of a base layer, characterized in that the base layer is separable into two layers. (2) The masking tape according to claim 1, wherein the base material layer is separated into two layers by impregnation with water.