JPH11310758A - Pressure-sensitive adhesive sheet for transfer adhesion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive sheet for transfer adhesion which can be peeled without requiring a large force when peeled from a colored pressure-sensitive adhesive sheet transfer-adhered to an adherend and which can be transfer-adhered accurately to a desired position of the adherend without fail. SOLUTION: This pressure-sensitive adhesive sheet for transfer adhesion, for transfer-adhering a colored pressure-sensitive adhesive sheet cut into a shape of characters or patterns to an adherend, is characterized in that half-cut lines 11 are formed vertically to the direction of peeling on one side of the substrate 1 comprising a stretched polypropylene sheet; the distance between the cut lines 11 is smaller than the sizes of characters or patterens; and a pressure-sensitive adhesive layer 2 is formed on the side having the cut lines 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive sheet which is cut out from a colored pressure-sensitive adhesive sheet into characters and figures, and which is used for display and decoration indoors and outdoors for transfer to an adherend. About.

[0002]

2. Description of the Related Art In order to use a colored pressure-sensitive adhesive sheet adhered to a release paper via a pressure-sensitive adhesive layer for display and decoration purposes, it is cut out into characters and figures on the release paper, and a colored pressure-sensitive adhesive sheet of unnecessary portions other than characters and figures is used. After removing the adhesive, a method is applied in which the remaining adhesive sheet is attached to the remaining colored adhesive sheet of characters or figures so as to cover the transfer adhesive sheet, and the adhesive sheet is peeled off from release paper and transferred to an adherend.

[0003] There are two types of base sheet materials used for the adhesive sheet for transfer, paper and synthetic resin, and it is generally said that a paper substrate is better than a synthetic resin base for the adhesive sheet for transfer. ing.

[0004] The reason for this is that when a pressure-sensitive adhesive sheet using a paper base is used, the paper base has a weak stiffness, and therefore, as shown in FIG. At the portion 61, the pressure-sensitive adhesive sheet 6 is broken, and the peeling force (P ₁ ) acts in a direction substantially perpendicular to the colored pressure-sensitive adhesive sheet 4. Therefore, it can be easily peeled off with a small force.

However, since the paper base material has poor transparency, when the color of the colored adhesive sheet is white or light, it is difficult to confirm the position of characters and figures through the adhesive sheet for transfer, and There was a problem that it was difficult to transfer correctly.

On the other hand, the adhesive sheet for transfer using a synthetic resin substrate has a strong base, so that the adhesive sheet 7 for transfer is not bent at the peeling start portion 71 but is curved as shown in FIG. The peeling force (P ₂ ) acts on the colored pressure-sensitive adhesive sheet 4 at an oblique angle, so that the pressure-sensitive adhesive sheet 7 and the colored pressure-sensitive adhesive sheet 4 are easily peeled off.

For this reason, it is necessary to increase the adhesive strength of the pressure-sensitive adhesive sheet 7 to be transferred. However, the pressure-sensitive adhesive sheet 7 is often used in a large area. There is a problem that a large force is required for peeling after the transfer, and the workability is deteriorated. Further, there is a problem that the transferred colored adhesive sheet is peeled off from the adherend and cannot be transferred.

Japanese Patent Application Laid-Open No. 2-16177 discloses a transferable pressure-sensitive adhesive sheet using a heat-active adhesive.
According to this method, the work of removing unnecessary parts is omitted, and the workability before transfer to the adherend is improved, but since the adhesive force between the transfer adhesive sheet and the colored adhesive sheet of characters and figures is large, There is also a problem that characters and figures are peeled off from the adherend after transfer.

[0009]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and can easily and firmly transfer a colored pressure-sensitive adhesive sheet cut into characters and figures from release paper. An object of the present invention is to provide a transferable pressure-sensitive adhesive sheet that can be transferred securely at a position.

[0010]

According to a first aspect of the present invention, there is provided a transfer adhesive sheet for transferring a colored adhesive sheet cut into characters or figures to an adherend. A wear pressure-sensitive adhesive sheet, on one surface of a substrate made of a substantially transparent synthetic resin sheet, cuts by half-cut are provided at regular intervals in a direction substantially perpendicular to the direction of peeling, the interval between the cuts is It is characterized in that an adhesive layer is laminated on a surface having a size smaller than the size of the character or the figure and having the cut portion.

As the synthetic resin sheet used in the present invention 1, polypropylene is typical, and polyethylene,
Polyethylene terephthalate and the like can be used, but are not particularly limited thereto.

The synthetic resin sheet is substantially transparent. Almost transparent means that when the transferable adhesive sheet using this is attached to a colored adhesive sheet of characters or figures, it means transparency at least so that figures and letters can be clearly seen through, and even if it is colorless and transparent However, it may be colored to the extent that it does not hinder the see-through of characters and figures.

The thickness of the synthetic resin sheet is 25 μm to 80 μm.
The range of m is preferred. If the thickness is less than 25 μm, it is not preferable because it is difficult to handle, easily wrinkled, and easily torn. 80
If it exceeds μm, the sheet becomes hard and loses flexibility,
Since the weight of the roll is large, it is inconvenient to transport, and the cost is unnecessarily high.

On one surface of the synthetic resin sheet, a cut is made by half-cutting in a direction substantially perpendicular to the direction in which the sheet is separated. The cut portions are provided substantially in parallel at regular intervals, do not penetrate the synthetic resin sheet, and do not separate the synthetic resin sheet.

The depth of the cut is preferably in the range of 50 to 90% of the thickness of the synthetic resin sheet. The cut portion is usually formed by cutting with a sharp blade, but may have a groove-like cross-sectional shape, and preferably has a width of 5 mm or less.

The interval between the cuts is set smaller than the size of the character or figure. The reason for this is that when the colored adhesive sheet of the transferred character or figure is peeled from the release paper, the cut portion is provided substantially perpendicular to the peeling direction, so that the adhesive sheet to be transferred is broken at the cut portion. The direction of the force is changed at the broken part, and it becomes easy to peel off.
Therefore, by making the length between the cut portions smaller than the size of the character or graphic, the character or graphic can be firmly peeled off from the release paper.

The synthetic resin sheet preferably contains a known antistatic agent in order to suppress the generation of static electricity, and furthermore, a surface on which an adhesive layer is laminated in order to enhance the adhesion with the adhesive. Is preferably subjected to a corona discharge treatment or the like.

The pressure-sensitive adhesive layer is laminated on a surface provided with a cut portion formed by half-cutting, and the pressure-sensitive adhesive may be one conventionally used as a pressure-sensitive adhesive tape or pressure-sensitive adhesive sheet.
A general-purpose acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, or the like can be used, but it is preferable to use an acrylic pressure-sensitive adhesive that can easily control the adhesive strength.

In order to laminate the pressure-sensitive adhesive layer on the synthetic resin sheet, the pressure-sensitive adhesive layer formed by applying and drying the pressure-sensitive adhesive on the release paper is bonded to the synthetic resin sheet.
A transfer method for peeling and removing the process paper is usually performed. The process paper at this time may be used as it is as a release paper.

In the pressure-sensitive adhesive sheet constructed as described above, a release paper is laminated on the surface of the pressure-sensitive adhesive layer, or as shown in FIGS. 2 and 4, a silicone resin or an alkyd resin is coated on the surface of the synthetic resin sheet 1. Is formed to form a roll.

The transfer adhesive sheet according to the second aspect of the present invention (hereinafter referred to as the present invention 2) is a transfer adhesive sheet for transferring an adhesive sheet cut into characters or figures to an adherend, It is made of a two-layer synthetic resin sheet that is almost transparent and has a different tensile strength. The sheet having a high tensile strength is provided with slits at regular intervals in a direction substantially perpendicular to the direction in which the sheet is peeled off. The size of the figure is smaller than that of the figure, and an adhesive is laminated on the surface having the slit.

The synthetic resin sheet used in the present invention 2 is
It is a laminate of two layers of synthetic resin having different tensile strengths, thereby preventing bending at portions other than the slit portion.

The same synthetic resin sheet as that described in the first invention is used. For example, the lower sheet on which the pressure-sensitive adhesive layer is laminated has a tensile strength of 6.0 to 9.0 kg /.
The upper layer sheet on the side opposite to the pressure-sensitive adhesive layer is 15 mm, and preferably has two layers having a tensile strength of 2.5 to 3.5 kg / 15 mm. In the method of laminating the two-layer sheet, it is preferable to bond and laminate the two layers with an adhesive or the like so that the interface between the two layers becomes clear.

The total thickness of the two-layer sheet is 25 to 100 μm.
m is preferable, and the thickness ratio between the upper layer and the lower layer is approximately 2: 3.
１ ： 1: 9 is preferred.

The lower sheet in contact with the pressure-sensitive adhesive layer is provided with a slit in a direction substantially perpendicular to the direction in which the character or figure is separated from the colored pressure-sensitive adhesive sheet. The slits are provided substantially parallel to each other at regular intervals, are provided so as to penetrate the front and back sides so as to separate the lower layer sheet, and are usually formed by a sharp blade. After the lower sheet having high tensile strength is provided with slits, an adhesive layer is laminated on the surface. The same adhesive layer as described in claim 1 can be used.

The width of the slit is not particularly limited. However, if the width is wide, the strength of the portion is reduced and the slit may be cut off during use. In addition, the interval between the slits is set smaller than the size of the character or figure, for the same reason as in the first embodiment.

The pressure-sensitive adhesive layer is laminated on the surface provided with the slit, and usable pressure-sensitive adhesives, lamination methods and the like are the same as described above.

(Function) The transferable pressure-sensitive adhesive sheet of the present invention 1 comprises:
On one surface of the base material made of a substantially transparent synthetic resin sheet, cut portions are provided at regular intervals in a direction substantially perpendicular to the direction in which the cut is made, and the interval between the cut portions is smaller than the size of the character or figure, Since the pressure-sensitive adhesive layer is laminated on the surface having the cut portion, the colored pressure-sensitive adhesive sheet of characters and figures after scraping can be effectively peeled off from release paper, and the colored pressure-sensitive adhesive sheet of characters and figures can be removed. Even when the color is white or light, it is easy to confirm the positions of characters and figures through the pressure-sensitive adhesive sheet for transfer, and it is possible to transfer accurately to a predetermined position.

The pressure-sensitive adhesive sheet for transfer according to the second aspect of the present invention is composed of a two-layer synthetic resin sheet that is substantially transparent and has a different tensile strength. Provided at intervals, the interval between the slits is smaller than the size of the characters and figures, and since the adhesive is laminated on the surface having the slits, the colored adhesive sheet of the characters and figures after descaling can be effectively removed. Even if the color of the colored adhesive sheet is white or light, it is easy to confirm the position of characters and figures through the adhesive sheet for transfer, and it can be accurately transferred to the specified position even if the color of the colored adhesive sheet is white or light color (Both refer to FIG. 5).

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the pressure-sensitive adhesive sheet for transfer according to the present invention will be described below with reference to the drawings. (Example 1) FIG. 1 is a cross-sectional view showing an example of a pressure-sensitive adhesive sheet for transfer according to the present invention 1. The pressure-sensitive adhesive sheet for transfer 10 is one side of a stretched polypropylene sheet 1 having a thickness of 40 μm.
24 μm deep (60% of total thickness) with an interval of 0 mm
Notches 11 are provided substantially parallel to each other,
13 μm thick acrylic pressure-sensitive adhesive layer 2
Are laminated. A release paper 3 is laminated on the surface of the pressure-sensitive adhesive layer 2.

FIG. 2 is a cross-sectional view showing another embodiment of the present invention 1, in which a release layer 30 made of a release agent is formed on the other surface of the stretched polypropylene sheet 1 instead of laminating release paper. It is a thing.

(Examples 2 to 4, Comparative Example 1) A transfer adhesive sheet was prepared in the same manner as in Example 1 except that the thickness of the stretched polypropylene sheet and the depth of the cut portions were as shown in Table 1. .

(Comparative Examples 2 to 4) Rolled adhesive sheets were prepared in the same manner as in Example 1 except that the thickness of the stretched polypropylene sheet was as shown in Table 1 and no cut portions were provided.

(Embodiment 5) FIG. 3 is a sectional view showing an embodiment 2 of the present invention. Reference numeral 1 denotes a stretched polypropylene sheet having a thickness of 60 μm, comprising an upper layer sheet 1a and a lower layer sheet 1b. The upper sheet 1a has a tensile strength of 2.5 kg / 15 mm,
The tensile strength of the lower layer sheet 1b is 7.5 kg / 15 mm. The thickness ratio between the upper sheet 1a and the lower sheet 1b is 1:
2. The lower sheet 1b is provided with slits 12 extending from front to back at an interval of 10 mm at a depth of 40 μm, and an acrylic pressure-sensitive adhesive layer 2 having a thickness of 13 μm is laminated on this surface, and a release paper 3 is laminated on the surface of the pressure-sensitive adhesive layer 2. Have been.

FIG. 4 is a sectional view showing another embodiment of the present invention 2, in which a release layer 30 made of a release agent is formed on the other surface of the stretched polypropylene sheet 1 instead of laminating release paper. It is a thing.

(Example 6, Comparative Examples 5 to 7) A transfer adhesive sheet was obtained in the same manner as in Example 5, except that an upper layer sheet and a lower layer sheet having the tensile strength shown in Table 2 were used.

(Comparative Example 8) As a transfer adhesive sheet, a conventional transfer adhesive sheet made of paper (manufactured by Sekisui Chemical Co., Ltd., product number "AP115") was used.

Evaluation Items The following three evaluation items were observed for the transferable pressure-sensitive adhesive sheets obtained in Examples 1 to 6 and Comparative Examples 1 to 8, and the results are shown in Tables 1 and 2.

Using a cutting machine, a transferable colored adhesive sheet (manufactured by Sekisui Chemical Co., Ltd., trade name “Hulcolor (white) HC095)” is used to cut each character of “Sekisui Chemical” by 5 characters in total of 20 characters (character size). : 15 mm × 15 mm), and unnecessary portions were descaled. Next, Examples 1 to 6 and Comparative Example 1
The transferable pressure-sensitive adhesive sheet obtained in Nos. 1 to 7 was adhered so as to cover 20 characters formed on a release paper, and was peeled off in a direction substantially perpendicular to the cut or slit direction. Thereafter, the number of characters transferred to the pressure-sensitive adhesive sheet for transfer was counted, and the transferability was evaluated.

Position Adjustability The colored pressure-sensitive adhesive sheet transferred above was adhered to a white polypropylene plate. At this time, the applicability to a desired position was evaluated while grasping the positional relationship between the adherend and the colored pressure-sensitive adhesive sheet through the transferable pressure-sensitive adhesive sheet.

Peelability from the adherend After the adhesive sheet was adhered to the white polypropylene plate as the adherend as described above, the easiness of peeling when the unnecessary pressure-sensitive adhesive sheet was peeled off was evaluated.

[0042]

[Table 1]

[0043]

[Table 2]

[0044]

According to the adhesive sheet for transfer according to the present invention, since the synthetic resin sheet portion is easily bent, when the colored adhesive sheet cut into characters or figures is peeled off from the release paper, it is firmly transferred without being left behind. Can be transferred to the adherend. Furthermore, since a synthetic resin sheet is used, transparency is high, and transfer to a desired position can be performed accurately at transfer to an adherend. In addition, after the transfer to the adherend is completed, even when peeling the unnecessary transfer adhesive sheet,
It is possible to peel off only the transferable pressure-sensitive adhesive sheet without peeling off the colored pressure-sensitive adhesive sheet from the adherend.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a pressure-sensitive adhesive sheet for transfer according to the present invention 1.

FIG. 2 is a sectional view showing another embodiment of the pressure-sensitive adhesive sheet for transfer according to the first invention.

FIG. 3 is a sectional view showing an embodiment of the pressure-sensitive adhesive sheet for transfer according to the second aspect of the present invention.

FIG. 4 is a sectional view showing another embodiment of the pressure-sensitive adhesive sheet for transfer according to the second invention.

FIG. 5 is a cross-sectional view showing a use state of the adhesive sheet for transfer according to the present invention.

FIG. 6 is a cross-sectional view showing a usage state of a conventional pressure-sensitive adhesive sheet for transfer.

FIG. 7 is a cross-sectional view showing a usage state of another conventional pressure-sensitive adhesive sheet for transfer.

[Explanation of symbols]

 1: stretched polypropylene sheet 2, 41: adhesive layer 3, 5: release paper 4: colored adhesive sheet 6, 7, 10: transfer adhesive sheet 1a: upper layer sheet 1b: lower layer sheet 11: cutout section 12: slit 30: Release layer

Claims (2)

[Claims] 1. A transfer adhesive sheet for transferring an adhesive sheet cut into characters or figures to an adherend, wherein the adhesive sheet is provided on one surface of a substrate made of a substantially transparent synthetic resin sheet in a direction in which it is peeled. On the other hand, cuts made by half-cut are provided at regular intervals in a substantially vertical direction, and the gap between the cuts is smaller than the size of the character or figure, and an adhesive layer is laminated on the surface having the cuts. A pressure-sensitive adhesive sheet for transfer. 2. A transfer adhesive sheet for transferring an adhesive sheet cut into characters or figures to an adherend, comprising a two-layer synthetic resin sheet that is substantially transparent and has a different tensile strength. In the high sheet, slits are provided at regular intervals in a direction substantially perpendicular to the direction in which the sheet is peeled, and the interval between the slits is smaller than the size of the character or figure, and an adhesive is laminated on the surface having the slit. A pressure-sensitive adhesive sheet for transfer.