JPH0731908A - Masker - Google Patents

Abstract

PURPOSE:To provide a masker rich in flexibility and not generating wrinkle of an adhesive tape or a folding bent there of, even when it is adhered on a curved surface or a curved line, and can be adhered even on a coarse surface with ruggedness without causing defective adhesion. CONSTITUTION:A nonwoven fabric provided with a filling layer in one side surface is used as a base material 1 for an adhesive tape part of the masker. On the other side of the surface of the nonwoven fabric, an partially impregnated into the nonwoven fabric is provided. A sheet 3 is stuck in a state being partially laid over the adhesive layer 2 to produce the objective masker.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a masker used for curing coating.

[0002]

2. Description of the Related Art Conventionally, a masker in which a curing sheet such as a film and a cloth adhesive tape are combined is used for curing the coating. As the cloth adhesive tape, a cloth which is roughly knitted with staple fibers or polyester fibers and laminated with a sealing layer made of polyethylene or the like as a base material, and one side of which is coated with an adhesive is used. In Figure 5,
An example of the cloth adhesive tape portion of such a masker will be shown.
In this cloth adhesive tape, a polyethylene laminate layer 53 is provided on one surface of a rough cloth 51 made of a staple, and an adhesive layer 52 is provided on the other surface in a state of being partially impregnated with the rough cloth 51.

On the other hand, as a masker for vehicle coating, a combination of a Japanese paper tape and a sheet is also used. FIG. 6 is a sectional view showing an example of a Japanese paper tape portion of a masker using a Japanese paper tape. This Japanese paper tape (# 241, manufactured by Nichiban Co., Ltd.) is
The shellac layer 63 is provided in a state in which the Japanese paper 61 is partially impregnated. A butyral resin layer 64 is provided on the other surface of the Japanese paper 61 in a state of being partially impregnated in the Japanese paper 61, and an adhesive layer 62 is provided thereon.

[0004]

Generally, a masker used for coating curing or the like is often attached to a curved surface, a curved line, or a rough surface having irregularities, so that flexibility is required.

However, the masker using the cloth adhesive tape cannot be adhered following a curved surface or a curved line because the tape base material is thick and hard and inferior in flexibility. Therefore, (1)
Since the pasting part floated up, and (2) the cloth adhesive tape was bent or wrinkled, the coating agent entered the gap, so that the requirement for curing the coating could not be sufficiently satisfied.

On the other hand, when the adherend such as a wall or floor is a rough surface, the masker using the cloth adhesive tape cannot follow the irregularity of the adherend because the base material is hard. For this reason, there is a drawback in that the adhesive cannot easily come into contact with the adhered surface, and thus adhesion failure is likely to occur.

In order to prevent such a defect, when a masker using the cloth adhesive tape is attached to a rough surface, it is necessary to increase the thickness of the adhesive layer to bring the adhesive layer into contact with the adherend surface. It was

However, such thickening of the pressure-sensitive adhesive layer has a drawback that the cost is increased and the pressure-sensitive adhesive tends to remain on the adhered surface when the masker is peeled off after the coating is completed.

The vehicle-painting masker using the above-mentioned Washi tape also has insufficient flexibility and has the same drawbacks as the masker using the cloth adhesive tape.

The present invention has been made in order to solve the above problems, and it does not cause wrinkles or bending of the adhesive tape even when it is attached to a curved surface or a curved line, and causes defective adhesion even on a rough surface having irregularities. It is an object of the present invention to provide a masker having excellent flexibility, which can be attached without any treatment.

[0011]

In the masker of the present invention, a sealing layer is provided on one side of a nonwoven fabric, and an adhesive layer partially impregnated into the nonwoven fabric is provided on the other side of the nonwoven fabric. And a sheet having an end attached to one side of the pressure-sensitive adhesive layer of the pressure-sensitive adhesive tape, thereby achieving the above object.

The present invention will be specifically described below with reference to the drawings.

The masker of the present invention can be used, for example, for coating curing or vehicle coating, and can be constructed as shown in FIG. 1 or 2, for example.

In the masker of FIG. 1, an adhesive layer 2 is provided on the surface of an adhesive tape substrate 1 composed of a non-woven fabric and a sealing layer on the side opposite to the sealing layer, and an adhesive tape 5 is formed. Then, one end of the sheet 3 is attached to the side edge of the adhesive layer 2 of the adhesive tape 5 to form a masker.

In the roll-shaped masker shown in FIG. 2,
As shown in FIG. 2B, one end of the folded sheet 4 is attached to one side of the adhesive layer 2 of the adhesive tape 5, and this is formed into a roll shape as shown in FIG. 2A. It is stacked.

The adhesive tape portion will be described below.

As the material of the above-mentioned non-woven fabric used for the adhesive tape substrate, various materials such as synthetic resin fibers such as polyester filaments, acrylic fibers or glass fibers can be used. When synthetic resin fibers are used, Can further improve the flexibility of the adhesive tape.
The non-woven fabric is obtained by pressing a spun bond made of the above-mentioned material, and a material having an appropriate substrate density can be selected to obtain flexibility. For example, when a nonwoven fabric made of polyester filaments is used, the basis weight is 5 g / m ²
It is preferably 50 g / m ² or less. The thickness of the non-woven fabric can be about 20 to 200 μm.

Although the above-mentioned nonwoven fabric has flexibility, it is necessary to control the elongation depending on the use. For example, when it is used for coating a vehicle or the like, if it has a high elongation, it may cause a sticking failure. In such a case, the nonwoven fabric is impregnated with polyvinyl alcohol, vinyl acetate resin, acrylic resin, or the like, or an impregnating agent obtained by adding an epoxy curing agent or the like to the desired elongation by controlling the impregnation amount. can do.

A sealing layer is provided on one surface of the non-woven fabric in order to prevent the adhesive from seeping out to the opposite side of the non-woven fabric. In order to enable the pressure-sensitive adhesive tape to be laminated in a roll shape, it is desirable to form the sealing layer by laminating and apply a release agent to the surface of the sealing layer.
As the above-mentioned laminating material, polyethylene (PE) or polypropylene (PP) which is easy to apply a release agent, etc.
It is preferable to use a synthetic resin such as.

As the pressure-sensitive adhesive coated on the other surface of the non-woven fabric, natural rubber-based, synthetic rubber-based, acrylic-based and other various adhesives can be used depending on the purpose of use of the masker. , A solution of a terpene-based resin and a process oil in a toluene solution.

The elongation of the non-woven fabric can also be controlled by impregnating the non-woven fabric with the appropriate amount of the pressure-sensitive adhesive.

The thickness of the pressure-sensitive adhesive layer remaining without being impregnated in the above-mentioned non-woven fabric can be, for example, about 20 to 50 μm when used as a masker for coating curing. Since the pressure-sensitive adhesive tape substrate including the non-woven fabric and the sealing layer has flexibility, the thickness of the pressure-sensitive adhesive layer can be made smaller than that of the masker using the cloth pressure-sensitive adhesive tape.

When used as a masker for vehicle coating, the pressure-sensitive adhesive layer can have a thickness of about 7 to 20 μm, and can be thinner than a masker using Japanese paper tape.

The structure of the adhesive tape portion may be, for example, as shown in FIG. 3 or 4.

FIG. 3 shows a cross section of the adhesive tape portion of the coating curing masker. This adhesive tape has a thickness of 100 μm
An adhesive is applied to one surface of the non-woven fabric 31 with a coating thickness of 100 μm. The adhesive is partially impregnated into the nonwoven fabric 31, and the thickness of the adhesive layer 32 is 30 μm. On the other surface of the non-woven fabric 31, a PP laminate layer 33 having a thickness of 20 μm is provided as a sealing layer.

FIG. 4 shows a cross section of an adhesive tape portion of a vehicle painting masker. In this adhesive tape, a non-woven fabric 41 having a thickness of 38 μm is impregnated with polyvinyl alcohol 44 for controlling the elongation of the non-woven fabric, and one surface of the non-woven fabric 41 is coated with an adhesive with a coating thickness of 50 μm. ing. The adhesive is partially impregnated into the non-woven fabric 41, and the adhesive layer 4
The thickness of 2 is 12 μm. On the other surface of the nonwoven fabric 41, a PP laminate layer 43 having a thickness of 20 μm is provided as a sealing layer.

The adhesive tape having the above-described structure is cut into a desired width and combined with a sheet to form a masker.

As the material for the sheet, various materials such as paper or film can be used. For example, a thin, durable and highly transparent plastic film such as a polyethylene film is easy to use, can be cut by hand, and the masked portion can be seen through, so that it can be preferably used.

A masker is formed by laminating the above-mentioned sheet on the adhesive layer portion of the adhesive tape so as to be overlapped with a predetermined width, and further, a roll-shaped masker is formed by folding the sheet portion and winding it around a paper core or the like. .

[0030]

In the masker of the present invention, a non-woven fabric having a sealing layer on one surface is used as the base material of the adhesive tape portion. Nonwoven fabrics are excellent in flexibility because they have a lower base material density than cloths and Japanese papers, and when they are used as pressure-sensitive adhesive tapes, they can follow curved surfaces and curved lines and have good adhesiveness. Further, it can be brought into close contact with a rough surface having irregularities. Furthermore, since the base material has flexibility, it is not necessary to increase the thickness of the pressure-sensitive adhesive layer.

[0031]

EXAMPLES Examples of the present invention will be described below.

In the following examples, "part" means "part by weight".

(Example) A spun bond made of polyester long fibers was pressed, and the basis weight was 12 g / m ² and the thickness was 4
A 3 μm non-woven fabric was impregnated with polyvinyl alcohol (hereinafter abbreviated as Poval) at 0.5 g / m ² . A polypropylene resin having a thickness of 20 μm was laminated on one surface of this non-woven fabric to obtain an adhesive tape base material.

Next, on the surface of the base material on the laminate layer side,
A long-chain alkyl-based stripping agent (RP-20 manufactured by Nippon Shokubai) was used.
1 g / m ^{2 was} applied. On the side opposite the laminate layer,
Natural rubber (peel crepe rubber) 100 as an adhesive
Part, terpene-based resin (YSPX-1 made by Yasuhara Chemical
15) A toluene solution of a mixture of 75 parts and 5 parts of process oil was applied, and the thickness of the adhesive layer after drying was 1
It was set to 5 μm. The obtained adhesive tape had a thickness of 74 μm.

Then, the obtained adhesive tape was cut into a width of 18 mm, and a sheet made of a polyethylene film having a thickness of 8 μm and a width of 50 cm and the adhesive surface of the adhesive tape (the surface of the adhesive layer) were overlapped by 4 mm in the width direction. They were pasted together to obtain a masker.

The sheet portion of this masker was folded and wound around a paper core to obtain a roll masker.

Comparative Example A commercially available cloth adhesive tape (manufactured by Sekisui Chemical Co., Ltd., cloth tape No. 600, adhesive layer thickness 120 μm, substrate thickness 220 μm) was cut into 18 mm width in the same manner as in the example. Then, a sheet made of a polyethylene film having a thickness of 8 μm and a width of 50 cm and the adhesive surface of the adhesive tape were attached to each other so as to overlap each other in the width direction by 4 mm to obtain a masker. Similar to the example, the sheet portion of this masker was folded and wound around a paper core to form a roll-shaped masker.

(Evaluation) 1. Finishing When the roll-shaped masker wound around the paper core had the same outer diameter, the masker of the example could be wound 2.5 times longer than the masker of the comparative example.

2. Use on iron plate surface When the maskers of the example and the comparative example were attached to the iron plate surface, both maskers could be attached without any problem, and there was no problem in curing performance during painting. Further, when the maskers were peeled off after coating and finishing, neither of the maskers had the adhesive remaining on the adherend (iron plate surface).

3. Use on concrete surface When the maskers of Examples and Comparative Examples were attached to a concrete wall, both maskers could be attached without any problem, and there was no problem with curing performance during painting. When the masker was peeled off after coating / finishing, no adhesive remained on the adherend (concrete wall) in the masker of the example, but in the masker of the comparative example, 1-10% of the adhesive remained on the adherend. Therefore, it is necessary to wipe off the adhesive.

4. Use on Uneven Surface An uneven surface having protrusions with a height of 1.5 mm at 5 mm intervals was prepared, and the maskers of Examples and Comparative Examples were attached thereto. In the masker of the example, the pressure-sensitive adhesive tape substrate was able to expand and contract to follow the uneven surface and adhere to it, and there was no ingress of the coating agent. On the other hand, in the masker of Comparative Example, the conformability to the uneven surface of the adhesive tape substrate was poor, and a slight gap was generated between the adhered surface and the adhesive layer. For this reason, the coating material slightly entered through the gap, and the curing performance was inferior to the masker of the example.

[0042]

Since the masker of the present invention has excellent flexibility of the adhesive tape portion, it can follow a curved surface or a curved line, and it does not cause wrinkles or bending of the adhesive tape, and even rough surface with irregularities. It can be attached without causing poor adhesion. Therefore, excellent curing performance can be exhibited as a masker for coating curing or vehicle coating. In addition, since it is not necessary to increase the thickness of the pressure-sensitive adhesive layer to give it flexibility, it is possible to manufacture at low cost and with high productivity. further,
Since the pressure-sensitive adhesive layer is thin, when the masker is wound in a laminated form to form a roll-shaped masker, it can be wound long if the outer diameter is the same. Further, by controlling the amount of the pressure-sensitive adhesive soaking into the non-woven fabric, the flexibility and the elongation can be controlled to obtain a masker having characteristics according to the purpose of use.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a masker of the present invention.

2A is a perspective view showing another embodiment of the masker of the present invention, and FIG. 2B is a sectional view of the masker of FIG. 2A in a developed state.

FIG. 3 is a cross-sectional view showing one embodiment of the adhesive tape portion of the masker of the present invention.

FIG. 4 is a cross-sectional view showing another embodiment of the adhesive tape portion of the masker of the present invention.

FIG. 5 is a cross-sectional view showing an example of a cloth adhesive tape portion of a conventional masker.

FIG. 6 is a cross-sectional view showing an example of a Japanese paper tape portion of a conventional masker.

[Explanation of symbols]

 1 Base Material 2 Adhesive Layer 3 Sheet 4 Folded Sheet 5 Adhesive Tape 31, 41 Nonwoven Fabric 32, 42 Adhesive Layer 33, 43 PP Laminate Layer (Sealing Layer) 44 Poval

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location C09J 7/02 JJN

Claims (1)

[Claims] 1. A pressure-sensitive adhesive tape comprising a non-woven fabric provided with a sealing layer on one surface thereof, and the other surface of the non-woven fabric provided with a pressure-sensitive adhesive layer partially impregnated into the non-woven fabric, and a pressure-sensitive adhesive tape comprising: A masker comprising: a sheet having an end attached to one side of an adhesive layer.