JP2001172584A - Adhesive tape for paint coatings and paint coatings with adhesive tape - Google Patents

Abstract

(57) [Summary] [Object] To provide a coating material with an adhesive tape which has a good winding shape, does not lose its shape, and has good rewindability and sticking workability. [Structure] Tape base material 2 such as polypropylene film
1, a pressure-sensitive adhesive layer 22 having a step in the width direction of the tape base material 21 is formed, and a thick pressure-sensitive adhesive layer region (adhesive fixing layer) 22a and a thin pressure-sensitive adhesive layer region (coating material fixing) Layer 22b. At this time, the width of the sticking fixing layer 22a and the width of the covering material fixing layer 22b can be arbitrarily set arbitrarily, but are formed substantially equal. On the thin coating material fixing layer 22b, the width direction end portion of the coating sheet 10 having substantially the same thickness as the step height is bonded, and the thickness in the region where the coating sheet 10 is bonded, and the coating sheet 10 are bonded. Thus, a coating material 1 with an adhesive tape according to the present invention having substantially the same thickness in the non-existent area is obtained. The coating material 1 with the adhesive tape is wound around a core material such as a paper core to form a roll masker.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pressure-sensitive adhesive tape for a coating material and a coating material with a pressure-sensitive adhesive tape. Specifically, the present invention relates to a coating material with an adhesive tape used in a paint spraying operation, and more specifically, to stabilize the shape of a wound body (winding shape) when wound into a roll. The present invention relates to a coating material with a pressure-sensitive adhesive tape and a pressure-sensitive adhesive tape for a coating material suitable for the coating material.

[0002]

2. Description of the Related Art In a paint spraying operation in a coating process, a so-called masking tape having a re-peelable pressure-sensitive adhesive layer formed on one side of paper or a plastic film is adhered to a portion where the paint is not to be sprayed. At this time, a method of partially covering the portion where the paint is not to be sprayed with the masking tape alone, or a sheet-like covering material such as newspaper or paper or a plastic film when the area of the portion where the paint is not desired to be sprayed is large. (Hereinafter, referred to as a “covering sheet”), a method is adopted in which the surface is covered, and the ends of the covering sheet are fixed with a masking tape to cover.

[0003] More recently, a coating material with an adhesive tape having an adhesive tape in advance on a covering sheet has been used in order to increase the efficiency of the covering operation of the portion where the paint is not to be sprayed. 3A and 3B are explanatory diagrams of the coating material 100 with an adhesive tape. FIG. 3A is a plan view of the coating material 100, and FIG. The coating material 100 is composed of a long sheet-shaped covering sheet 10 such as a plastic film or paper and an adhesive tape 110, and partially exposes the adhesive surface to the width direction end of the covering sheet 10. Thus, the adhesive tape 110 is stuck and integrated. The coating material 100 with the adhesive tape is usually wound around a paper core or the like, and is generally called “roll masker” in the coating industry. The adhesive tape 110 is formed by forming a removable adhesive layer 112 on a tape base 111.

[0004] The coating material 110 with the adhesive tape is applied to the object to be coated while being unwound from the roll (wound body) while being rewound like a normal adhesive tape. The surface of the cover sheet 10 can be covered only by sticking and fixing using the surface (surface), and the efficiency of the covering operation requiring a large area covering can be improved.

[0005]

In such a roll masker, a coating sheet having a thickness of about 10 to 100 μm is usually formed on an adhesive surface of an adhesive tape having a width of about 15 to 25 mm to about half of the area of the adhesive surface. For example, in the case of a tape having a width of 20 mm, the tape is bonded only to a width of about 10 mm and wound in the length direction.

[0006] For this reason, between the portion where the cover sheet is bonded and the portion where the cover sheet is not bonded, the portion where the cover sheet is bonded becomes thicker by the thickness of the cover sheet. As a result, if a long sheet having a length of several tens of meters to several hundreds of meters is wound, the winding shape will be distorted due to the difference in thickness between the portion where the covering sheet is bonded and the portion where it is not. For example,
When a 15 μm thick cover sheet is bonded to a 100 μm thick adhesive tape, the bonded portion of the cover sheet becomes 15 μm thicker. In the part that is not
The difference amounts to about 1.5 mm. Further, as the thickness of the adhesive tape becomes smaller, for example, about 40 μm, it becomes difficult to form a more uniform winding shape. As a result, there has been a problem that the wound shape is lost and the adhesive surface is immediately exposed.

[0007] This problem not only deteriorates the shape quality of the roll masker, but also may lead to a reduction in the quality of the coating process such as a reduction in the finish of the coating.

The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems. As a result, when the covering sheet is attached to the adhesive tape, the thickness of the portion where the adhesive tape is attached and the portion where the adhesive tape is not attached are determined. The inventors have found that the above problems can be solved by eliminating the difference and making the thicknesses of the coated sheet affixed portion and the coated sheet non-adhered portion uniform, thereby completing the present invention.

[0009]

The pressure-sensitive adhesive tape for a coating material according to the present invention is applied to an end of a coating sheet used for masking at the time of coating, and is an adhesive tape used for a coating material with a pressure-sensitive adhesive tape. In addition, a step is formed in the pressure-sensitive adhesive layer of the pressure-sensitive adhesive tape, and the pressure-sensitive adhesive layer has a different thickness in a width direction of the pressure-sensitive adhesive tape.

In this pressure-sensitive adhesive tape, it is preferable to use a polyolefin-based plastic film as a tape base material of the pressure-sensitive adhesive tape, and it is particularly preferable to use a polypropylene film.

The pressure-sensitive adhesive tape for a coating material with a pressure-sensitive adhesive tape according to the present invention is a coating material with a pressure-sensitive adhesive tape, wherein the pressure-sensitive adhesive tape is attached to at least one widthwise end of a coating sheet used for masking during coating. In, the thickness in the area where the covering sheet is attached to the adhesive tape,
The thickness is substantially the same in the pressure-sensitive adhesive tape region where the covering sheet is not attached.

For this purpose, the pressure-sensitive adhesive tape according to the present invention may be used as the pressure-sensitive adhesive tape, and a cover sheet may be stuck to the pressure-sensitive adhesive layer region having a small thickness.

In the present invention, it is desirable to use a polyolefin-based plastic film for both the tape base of the pressure-sensitive adhesive tape and the covering sheet.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an end view in which a part of a coating material 1 with an adhesive tape according to an embodiment of the present invention is partially broken, and FIG. 2 shows an adhesive tape with an adhesive tape shown in FIG. It is an end surface block diagram of the adhesive tape 20 used for the coating material 1. FIG.

A coating material 1 with an adhesive tape according to the present invention.
Is provided with a covering sheet 10 and an adhesive tape 20 for attaching and fixing the covering sheet 10 to an adherend such as an object to be painted. The covering sheet 10 is for masking an object to be coated so that the paint is not applied. Like the covering sheet 10 conventionally used, the covering sheet 10 is a sheet-like material such as plastic or paper, particularly a long sheet-like material. Is used. The thickness of the cover sheet 10 is appropriately set depending on the thickness of the pressure-sensitive adhesive layer 22 of the pressure-sensitive adhesive tape 20, the purpose of use thereof, and the like, but a thin sheet of about 5 to 50 μm is preferably used.

The pressure-sensitive adhesive tape 20 comprises a pressure-sensitive adhesive layer 22 and a tape base 21 on which the pressure-sensitive adhesive layer 22 is laminated. The tape substrate 21 is not particularly limited, and examples thereof include various plastic films such as a polyolefin film such as a polyethylene film and a polypropylene film, a polyester film, and a nylon film, cloth, and paper. Above all, a polypropylene plastic film is preferable in order to make the boundary between the paint sprayed portion and the non-sprayed portion clear (improve parting performance). These tape bases 21
Is not particularly limited, but is usually 20 to 20
Those having a thickness of about 0 μm are used.

Further, various easy peeling treatments can be performed on the non-adhesive layer side of the tape substrate 21. By performing the easy peeling treatment, the rewinding becomes smooth, and the sticking to the adherend (the object to be coated) becomes easy.

The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer 22 is not particularly limited, and may be appropriately selected from various known pressure-sensitive adhesives such as an acrylic pressure-sensitive adhesive and a rubber-based pressure-sensitive adhesive. Since it is peeled off from the substrate, a material which has little so-called glue residue and is easily removable is selected.

In the present invention, as shown in FIG. 2, the pressure-sensitive adhesive layer 22 of the pressure-sensitive adhesive tape 20 is laminated on the tape base 21 so as to form a step by varying the thickness in the width direction. . More specifically, in the pressure-sensitive adhesive tape 20 shown in FIG.
A pressure-sensitive adhesive layer region in which the thickness of the pressure-sensitive adhesive layer 22 is increased, that is, an adhesive fixing layer 22a to be adhered to an adherend;
Pressure-sensitive adhesive layer region having a reduced thickness, that is, the covering sheet 1
The cover sheet fixing layer 22b to which 0 is attached is formed, and a step is formed at a boundary between the two layers.

The width of the sticking-fixing layer 22a and the width of the covering sheet fixing layer 22b may be determined as long as the sticking force enough to stick the coating object or the covering sheet 10 can be exerted. Generally, they are formed with approximately equal widths.

The pressure-sensitive adhesive layer 22 having the step can be formed by using a coating method such as a gravure coater or a reverse coater and adjusting the amount of the pressure-sensitive adhesive applied in the width direction with a doctor blade or the like. Alternatively, once the pressure-sensitive adhesive layer having the same thickness as the covering sheet fixing layer 22b is
1, after being provided over the entire surface, further in the region of the sticking and fixing layer 22a,
The pressure-sensitive adhesive layer 22 having a step can be formed by partially coating (stripe-coating) the pressure-sensitive adhesive.

At this time, the step height of the pressure-sensitive adhesive layer 22 must be set to be the same as the thickness of the covering sheet 10 to be used.
When the cover sheet 10 is bonded to the cover sheet fixing layer 22b, it is necessary to adjust the surface of the cover fixing layer 22a and the surface of the cover sheet 10 to be the same.

The thickness of the pressure-sensitive adhesive layer 22 is not particularly limited either.
The coating is performed so as to have a thickness of 25 to 100 μm in 2a and 15 to 50 μm in the thin cover sheet fixing layer 22b of the pressure-sensitive adhesive layer 22.

The covering sheet 10 to be used is not particularly limited, and a material similar to the covering sheet 10 conventionally used is used. For example, a plastic film such as a polyethylene film or a polypropylene film, paper such as kraft paper, a metal foil such as an aluminum foil, and the like can be given. In particular, it is desirable to use a polyolefin-based plastic film together with the tape base material 21 in order to further improve the parting property.

It is necessary to select the thickness of the coating sheet 10 so that the thickness of the coating material 1 becomes uniform in the area where the adhesive tape 10 is applied when the coating sheet 10 is applied to the coating sheet fixing layer 22b. The thickness is selected to be approximately the same as the height of the step. Usually, a thin material of about 5 to 50 μm is used. The length in the width direction of the covering sheet 10 is appropriately set according to the covering area.

The pressure-sensitive adhesive tape 20 having the above-mentioned step is adhered to the coating sheet fixing layer 22b at one end or both ends in the width direction of the coating sheet 10, and the coating material 1 with the pressure-sensitive adhesive tape according to the present invention is provided. Is obtained.

The coating material 1 with the adhesive tape thus obtained is wound on a core material having an appropriate size, such as a paper core, and provided as a roll masker. Even when wound as a roll masker in this manner, a uniform thickness can be maintained in the region where the adhesive tape 20 is stuck, so that a favorable winding shape can be secured. Also, when rewinding, it can be rewound straight without being distorted, and can be properly attached to the adherend without distortion.

Of course, in the present invention, not only a roll masker can be wound up, but also it can be cut into an appropriate size and supplied.

[0029]

Next, the present invention will be described in more detail with reference to the following examples. Of course, it goes without saying that the present invention is not limited to the following examples.

Example 1 A rubber-based adhesive was applied to an OPP (biaxially oriented polypropylene) substrate having a thickness of 40 μm and a width of 20 mm, and the coating sheet fixing layer had a thickness of 30 μm and a width of 10 μm.
The thickness of the adhesive fixing layer was 40 μm and the width was 10 mm to prepare an adhesive tape for a coating material. An end portion in the width direction of a plastic film made of polyethylene having a thickness of 10 μm and a width of 100 mm was adhered to the coating sheet fixing layer to obtain a coating material with an adhesive tape of the present invention. After that, take up the length of 50m on the paper core,
Roll masker.

Example 2 A rubber-based adhesive was applied to an OPP (biaxially oriented polypropylene) substrate having a thickness of 60 μm and a width of 25 mm, and the coating sheet fixing layer had a thickness of 25 μm and a width of 15 μm.
The thickness of the adhesive fixing layer was 45 μm and the width was 10 mm to prepare an adhesive tape for a coating material. An end portion in the width direction of a plastic film made of polyethylene having a thickness of 20 μm and a width of 100 mm was stuck to the coating sheet fixing layer to obtain a coating material with an adhesive tape of the present invention. Thereafter, a length of 100 m was wound around a paper core to obtain a roll masker.

Example 3 An acrylic pressure-sensitive adhesive was applied to a PET (polyethylene terephthalate) substrate having a thickness of 25 μm and a width of 22 mm, and the thickness of the coating sheet fixing layer was 20 μm.
Is 15 mm in width, and the thickness of the adhesive fixing layer is 30 μm and 7 mm in width.
Thus, an adhesive tape was produced. This coating sheet fixing layer is provided with a coating sheet having a thickness of 10 μm and a width of 100 μm.
The end portion in the width direction of a plastic film made of polyethylene having a thickness of 1 mm was adhered to obtain a coating material with an adhesive tape of the present invention. Thereafter, a length of 100 m was wound around a paper core to obtain a roll masker.

(Embodiment 4) Thickness 100 μm, width 18 mm
An acrylic pressure-sensitive adhesive is applied to a PVC (polyvinyl chloride film) base material, and the thickness of the coating sheet fixing layer is 20 μm and the width is 9 mm, and the thickness of the sticking fixing layer is 35 μm and the width is 9 mm. Produced. This coating sheet fixing layer has a thickness of 15 μm and a width of 100 mm as a coating sheet.
Of the polypropylene plastic film was applied to obtain a coating material with an adhesive tape of the present invention. Thereafter, a length of 100 m was wound around a paper core to obtain a roll masker.

(Comparative Example 1) A roll masker was obtained in the same manner as in Example 1, except that the thickness of the pressure-sensitive adhesive layer was uniformly set to 40 μm in the width direction of the pressure-sensitive adhesive tape.

(Comparative Example 2) A roll masker was obtained in the same manner as in Example 2, except that the thickness of the covering sheet to be attached was changed to 35 µm.

(Evaluation Results) The roll maskers of the above Examples and Comparative Examples were evaluated for the winding shape and rewound to confirm the sticking workability. Table 1 shows the evaluation results. As can be seen from Table 1, in each of the examples, the winding shape was good, and it was confirmed that there was no problem in the sticking workability. On the other hand, in the roll masker of the comparative example,
Since the thickness was different and a step was formed, a good wound shape could not be obtained. In addition, distortion occurred at the time of rewinding, and the workability of sticking was poor.

[0037]

[Table 1]

[0038]

In the coating material with an adhesive tape according to the present invention, the thickness in the area where the covering sheet is adhered to the adhesive tape is substantially the same as the thickness in the area where the covering sheet is not adhered. Therefore, even when wound on a paper core or the like, the roll shape is not distorted and a roll masker that is stable in a good shape can be obtained. Also, the rewinding property is good, and the masking operation can be performed easily and reliably.

According to the pressure-sensitive adhesive tape for a coating material of the present invention, since the pressure-sensitive adhesive layer of the pressure-sensitive adhesive tape has a step, the end of the coating sheet is bonded to the thinned portion of the pressure-sensitive adhesive layer. Thereby, a step due to the covering sheet can be eliminated. As a result, even when the covering sheet is attached, the thickness of the coating covering material in the region where the adhesive tape is adhered can be made uniform, and it is possible to take up the material without losing its shape.

At this time, by using a polyolefin-based plastic film, particularly a polypropylene film, as the base material of the pressure-sensitive adhesive tape, the parting property can be improved and the finish of the coating can be beautiful.

In particular, by using a polyolefin-based plastic film for both the tape base material and the covering sheet to be adhered to the adhesive tape, the parting properties can be further improved and the finish of the coating can be improved.

[Brief description of the drawings]

FIG. 1 is an end view showing a part of a coating material with a pressure-sensitive adhesive tape according to the present invention;

FIG. 2 is an end view of the pressure-sensitive adhesive tape for a coating material of the present invention.

FIGS. 3A and 3B are explanatory views showing a conventional coating material with an adhesive tape, wherein FIG. 3A is a plan view and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 The coating material with an adhesive tape of this invention 10 The coating sheet 20 The adhesive tape 21 The tape base 22 The adhesive layer 22a The adhesive fixing layer which is a thick adhesive layer area 22b The coating sheet fixing layer which is a thin adhesive layer area

Claims (6)

[Claims] 1. An adhesive tape which is attached to an end of a coating sheet used for masking at the time of coating and is used for a coating material with an adhesive tape, wherein a step is formed in an adhesive layer of the adhesive tape, A pressure-sensitive adhesive tape for a coating material, wherein the pressure-sensitive adhesive layer has a different thickness in the width direction of the pressure-sensitive adhesive tape. 2. The pressure-sensitive adhesive tape according to claim 1, wherein the tape base of the pressure-sensitive adhesive tape is a polyolefin-based plastic film. 3. The adhesive tape according to claim 1, wherein the tape base of the adhesive tape is a polypropylene film. 4. A coating material with an adhesive tape having an adhesive tape attached to at least one widthwise end of a coating sheet used for masking during coating, wherein the thickness in a region where the coating sheet is attached to the adhesive tape. And a thickness in a pressure-sensitive adhesive tape area where the covering sheet is not attached is substantially the same. 5. The adhesive tape according to claim 1, 2 or 3.
5. The pressure-sensitive adhesive tape according to claim 4, wherein the cover sheet is attached to the pressure-sensitive adhesive layer region having a small thickness.
A coating material with an adhesive tape according to the description. 6. The coating material with a pressure-sensitive adhesive tape according to claim 4, wherein the tape base of the pressure-sensitive adhesive tape and the cover sheet are both polyolefin-based plastic films.