JP2000274421A - Sucker sticking sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase holding power by increasing the number of sucker shapes per unit area by providing a flat part and an air passage surrounded by a projecting part composed of a flexible resin. SOLUTION: In a sucker sticking sheet having a sucker layer on a support, the sucker layer has a flat part 22 and an air passage 23 surrounded by a projecting part 21 composed of a flexible resin. Sucking force of a sucker is attained by a pressure reducing effect by releasing air of a part [a cavity chamber] surrounded by the projecting part 21 for constituting a sucker shape by oppositely pressing down the sucker and an installing object. Thus, when increasing the volume of the cavity chamber, strong sucking force can be obtained. A shape of the projecting part 21 is required to have the flat part 22 at least on the inside, and when a top part is roundish, the top vicinity is easily deformed, so that air in the cavity chamber can be easily released in large quantities to thereby obtain an effective pressure reducing effect to increase holding power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-like patch having a suction cup shape.

[0002]

2. Description of the Related Art As means for holding a sticking material such as a sticker or a label, a device utilizing the suction force of a suction cup has been disclosed (JP-A-6-238845).

The suction force of the suction cup has an appropriate holding force in the horizontal and vertical directions, but is weak to the operation of trying to allow air to enter the sticking surface, in other words, the suction force of the four corners of the sucker sticking sheet. Of these, it has a property that it is weak against the force of grasping one end and trying to peel off. Therefore, it is possible to prevent the adherend from being damaged at the time of peeling of the suction sticking sheet, and it is not necessary to use a pressure-sensitive adhesive having a strong adhesive force, thereby preventing cohesive peeling of the pressure-sensitive adhesive. And can be adhered to another place after peeling.

[0004]

However, Japanese Patent Laid-Open No. 6-2 / 1994
No. 38845 discloses a sucker sticking sheet,
Despite the advantages described above, when adhering the suction cup-attached sheet to the adherend, air mixed between the suction cup-attached sheet and the adherend cannot be escaped properly, and the work However, there is a problem that the appearance of the posted articles and the like after sticking is poor. This is due to the fact that we tried to solve the weakness of the holding power of each suction cup shape by continuously installing the suction cup shapes and increasing the number of suction cup shapes per unit area. Conceivable.

[0005]

The inventor of the present invention has made intensive studies to solve the above-mentioned problems, and as a result, has accomplished the present invention.

That is, the sucker sticking sheet 3 of the present invention is a sucker sticking sheet 3 having a sucker layer 2 on a support 1,
The suction cup layer 2 has a convex portion 21 made of a flexible resin, a flat portion 22 surrounded by the convex portion 21, and an air flow path 23.

[0007] Preferably, the flat portion 22 is made of a flexible resin.

Alternatively, the air flow path 23 is made of a flexible resin.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A sucker sticking sheet 3 of the present invention is a sucker sticking sheet 3 having a sucker layer 2 on a support 1, wherein the sucker layer 2 is made of a resin having flexibility. It has a convex portion 21, a flat portion 22 surrounded by the convex portion 21, and an air flow path 23.

Examples of the support 1 include plastic films such as polyester, polyethylene and polypropylene, and paper. Here, the surface of the support 1 on which the suction layer 2 is formed is subjected to an easy adhesion treatment, or the image forming layer and the mat layer are formed on the surface of the support 1 opposite to the surface on which the suction layer 2 is formed. Such a desired layer can be formed without any problem. By doing so, when the image forming layer is provided, after forming a desired image on the image forming layer, the suction cup sticking sheet 3 can be stuck to a desired place as a notice, and a mat When a layer is provided, it can be used as a mouse pad pasted on a table.

The suction layer 2 includes a convex portion 21 made of a flexible resin, a flat portion 22 surrounded by the convex portion 21,
And an air passage 23.

The shape composed of the convex portion 21 and the flat portion 22 surrounded by the convex portion 21 is a so-called sucker shape, whereby a suction force can be exhibited. The suction force of the suction cup is achieved by a decompression effect by opposing and pressing the suction cup and the adherend, and letting out air in a portion (hereinafter, referred to as “cavity chamber”) surrounded by the convex portion 21 forming the suction cup shape. Therefore, if the volume of the cavity is increased, a strong suction force can be obtained. The volume of the cavity is determined by the difference in height between the convex portion 21 and the flat portion 22 constituting the suction cup shape, and the area of the flat portion 22.

As the resin constituting the convex portion 21, a resin having flexibility is used in order to effectively reduce the pressure in the cavity. The resin having flexibility may have sufficient flexibility by blending a plasticizer even if the resin itself after curing does not have sufficient flexibility. In addition, the resin may be either adhesive or non-adhesive, but if it is adhesive, it does not damage the adherend at the time of peeling, and the cohesive peeling of the adhesive is performed. Preferably, it does not occur.

Such resins include vinyl chloride resins, vinyl acetate resins, vinylidene chloride resins, polyester resins, urethane resins, polyamide resins, polystyrene resins, acrylic resins, ultraviolet curable resins, One or more of ionizing radiation-curable resins and the like can be used, and the plasticizer includes diethyl phthalate, dibutyl phthalate, dioctyl terephthalate,
One or more of dioctyl phthalate, epoxidized linseed oil and the like can be used.

The shape of the convex portion 21 is not particularly limited, such as a ring shape, an elliptical shape, and a polygonal shape. The shape of each convex portion may be different, but at least a flat portion is formed inside the convex portion. It is necessary to have 22. Among them, a polygon in which many convex portions 21 can be installed and in which a regular air flow path 23 is easily formed is preferably used.
Further, it is preferable that the shape of the convex portion 21 is such that the top is rounded. If the top is rounded, the vicinity of the top is easily deformed, so that a large amount of air in the cavity can escape easily and a large amount of pressure can be obtained.

Here, as described above, depending on the height difference between the convex portion 21 and the flat portion 22 and the area of the flat portion 22,
The volume of the cavity, that is, the suction force per suction cup shape is determined. However, it is desirable to adjust the volume of the cavity according to the difference in height between the convex portion 21 and the flat portion 22 in consideration of the suction force of the entire suction sticking sheet 3.

The difference in height between the convex portion 21 and the flat portion 22 depends on the area of the flat portion 22, but is preferably 1 to 100 μm. When the thickness is 1 μm or more, an appropriate suction force can be given. When the thickness is 100 μm or less, the pressure in the cavity can be easily reduced. Further, by setting the difference in height between the convex portion 21 and the flat portion 22 to 100 μm or less, when the sucker sticking sheet 3 has a light transmitting property as a whole, a flexible resin The difference in the light transmittance of each part on the suction sticking sheet 3 caused by the influence can be reduced, so that the appearance of the suction sticking sheet 3 can be improved.

The flat part 22 has a role of forming a suction cup shape together with the convex part 21.

Here, the flat portion 22 is preferably made of a flexible resin (FIG. 4). By adopting such a configuration, the flexible resin also exists in a portion lower than the portion forming the cavity in the convex portion 21, and the flexible resin serves as a cushion. Therefore, the protrusion 21 can sufficiently sink into the adherend, and the cavity can be effectively depressurized to obtain a strong suction force. Further, when the flexible resin has an adhesive force, not only the suction force due to the depressurizing effect of the hollow chamber, but also the adhesive force due to the flat portion 22 itself being grounded to the adherend acts, thereby reducing the strength. A holding force can be obtained. Therefore, it is not necessary to form suction cups densely to obtain a desired holding force, and the air flow path 23
Even if it forms, holding power equal to or more than the conventional product can be obtained.

The air passage 23 serves to release air that enters when the suction sticking sheet 3 is adhered to the adherend, improve workability, and improve the appearance of the notices and the like after the adhesion. It has. The air flow path 23 may be formed entirely between the adjacent protrusions 21 as shown in FIG. 1 or may be formed as shown in FIG.
May be formed on a part of the side.

The difference in height between the air passage 23 and the projection 21 is
It is preferably from 1 to 100 μm. When the thickness is 1 μm or more, the air can be effectively removed at the time of sticking, and when the thickness is 100 μm or less, the pressure in the cavity can be easily reduced. Further, by setting the difference in height between the convex portion 21 and the air flow path 23 to 100 μm or less,
When the sucker sticking sheet 3 has light transmittance as a whole, the difference in light transmittance between the portions on the sucker sticking sheet 3 caused by the influence of the flexible resin can be reduced. Thereby, the appearance of the suction sticking sheet 3 can be improved.

The air passage 23 is preferably made of a flexible resin (FIG. 5). By adopting such a configuration, the flexible resin also exists in a portion lower than the height of the air flow path 23 in the convex portion 21, and the flexible resin plays a role of a cushion. Therefore, the protrusion 21 can sufficiently sink into the adherend, and the cavity can be effectively depressurized to obtain a strong suction force. Therefore, it is possible to eliminate the necessity of forming a suction cup shape densely to obtain a desired holding force.

Such a sucker layer 2 is prepared by silk-screen printing, gravure printing, or pouring the resin into a mold embossed by an embossing roll having a sucker shape on the support 1. Is transferred onto the support 1 or the like. In the case of using an embossed mold, since the bottom of the mold treated by the embossing roll is generally rounded, the convex portion 21 of the sucker sticking sheet 3 formed therefrom is used. Has a rounded top, and has strong adsorption power.

Since the sucker sticking sheet 3 of the present invention adopts the above-described structure, the workability at the time of sticking, which has been a problem in the past, while obtaining an appropriate holding force by the suction force of the sucker shape. Problems such as poor appearance and poor appearance after pasting can be solved.

Further, since the portions other than the convex portions 21 of the suction cup layer 2 are made of a flexible resin, a stronger holding force can be obtained. Can be prevented from accidentally falling off.

[0026]

The present invention will be further described with reference to the following examples.

Example 1 A 100-μm-thick polyester film 1 having a single-sided surface with an easy-adhesion treatment was coated with UV ink (USL-3: Jujo Chemical Co., Ltd.) to form a square with a side of 3 mm. The width of the air flow path 23 is 1 mm, and the height of the convex portion 21 after drying is 5 μm.
m, and screen-printed so that the width of the convex portion 21 was 0.3 mm, and then cured by irradiating ultraviolet rays to obtain a sucker sticking sheet 3 (FIG. 3).

Example 2 A UV ink (USL-3: Jujo Chemical Co., Ltd.) was used on the easily adhesive-treated surface of the polyester film 1 having a thickness of 100 μm and one surface of which was easily adhered. The width of the air passage 23 is 1 mm, and the height of the protrusion 21 after drying is 8 μm.
m, the width of the convex portion 21 is 0.3 mm, and the height of the flat portion 22 is 3
After microgravure printing to a thickness of μm, the film was cured by irradiating ultraviolet rays to obtain a sucker sticking sheet 3 (FIG. 4).

Example 3 Polyethylene was laminated on a high-quality paper having a basis weight of 110 g / m ^{2 to} a thickness of 20 μm.
A concave portion formed of a square with sides of 3 mm was formed by embossing so that the depth was 5 μm, the width was 0.3 mm, and the distance between adjacent concave portions was 1 mm. Next, a silicone release agent was applied to the embossed surface to obtain a release sheet.

On the obtained release sheet, UV ink (U
V QVN screen ink: Teikoku Ink Mfg. Co., Ltd.) was dissolved in a solvent, and the dried film thickness of the suction layer 2 (portion corresponding to the air flow path 23 of the suction sheet 3) was 10%.
μm is applied by a bar coater method, and a 100 μm-thick polyester film having a 100 μm-thick single-sided polyester film is adhered to the easily adhered surface of the support 1 on the sucker layer 2 and cured by irradiating ultraviolet rays. After the release, the release sheet was peeled off to obtain a sucker sticking sheet 3 (FIG. 5).

Comparative Example 1 A 100-μm-thick polyester film 1 having a 100 μm-thick single-sided surface was treated with a UV ink (UV QVN screen ink: Teikoku Ink Mfg. Co., Ltd.) to form a positive 3 mm side. A continuous sucker shape consisting of a square was screen-printed so that the height of the convex portion 21 after drying was 5 μm and the width was 0.3 mm, and then cured by irradiating ultraviolet rays to obtain a sucker sticking sheet (FIG. 6, FIG. 7).

The sucker sticking sheets 3 obtained in Examples and Comparative Examples were evaluated for workability when sticking to window glass, appearance of the sticked state, and holding force after sticking. Table 1 shows the results.

(1) Workability When sticking the suction cup sticking sheet 3 to the window glass, a mark “○” indicates that the mixed air easily escapes, and a mark “×” indicates that the air does not escape or hardly escapes.

(2) Appearance In a state where the suction cup sticking sheet 3 is stuck to the window glass,
A sample with good appearance without the presence of air bubbles was rated as “○”, and a sample with air bubbles and poor appearance was rated as “x”.

(3) Retention force After sticking the suction cup sticking sheet 3 to the window glass, one that does not fall off even after one month is marked with “○”, and falling off is observed between one week and less than one month. The sample that was dropped within one week was marked as "x".

[0036]

[Table 1]

In Examples 1 to 3, which have the air passage 23, all of them were excellent in workability and appearance. In each case, the sucker sticking sheet 3 after the peeling could be reused without the sucker layer 2 being cohesively peeled at the time of peeling.

In the case of Example 1, the holding power was equivalent to that of the comparative example, but the workability and appearance were superior to those of the comparative example.

The sample of Example 2 was superior to the comparative example in all items. In particular, since the flat portion 22 is made of a flexible resin, the flat portion 22 has a strong holding force and does not fall off carelessly.

The product of Example 3 was superior to the comparative example in all items. In particular, the air passage 23 is made of a flexible resin, and the
Since the crests were rounded, they had strong holding power due to the effective depressurization of the cavity chamber, and were not accidentally dropped.

On the other hand, the comparative example is inferior in workability as compared with the example because the air mixed at the time of sticking cannot be escaped well, and air bubbles are mixed in the state of sticking. It was not good looking.

[0042]

According to the sucker sticking sheet of the present invention, the workability at the time of sticking and the appearance of the sticked state can be improved while obtaining the same suction force as the conventional product. .

Further, since the portions other than the convex portions of the suction cup layer are made of a flexible resin, a stronger holding force can be obtained, and it is possible to prevent accidental detachment after sticking. it can.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of a suction cup sticking sheet of the present invention.

FIG. 2 is a plan view showing another embodiment of the sucker sticking sheet of the present invention.

FIG. 3 is a cross-sectional view showing another embodiment of the suction cup sticking sheet of the present invention.

FIG. 4 is a sectional view showing another embodiment of the suction cup sticking sheet of the present invention.

FIG. 5 is a sectional view showing another embodiment of the suction cup sticking sheet of the present invention.

FIG. 6 is a plan view showing a conventional sucker sticking sheet.

FIG. 7 is a cross-sectional view showing a conventional sucker sticking sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Support body 2 ... Sucker layer 21 ... Convex part 22 ... Flat part 23 ... Air flow path 3 ... Sucker sticking sheet

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J038 CA11 DA02 4F100 AK01B AK12 AK15 AK22 AK25 AK41 AK46 AK51 AT00A BA02 DD03B DD04B DD27B EJ54 GB90 HB31 JK06 JK13B JK17B JL13 JL13B 4J004 AA02 A07A01 A02A07 CE03 FA01

Claims (3)

[Claims] 1. A sucker sticking sheet 3 having a sucker layer 2 on a support 1, wherein the sucker layer 2 is a convex portion 21 made of a flexible resin, and is surrounded by the convex portion 21. A sucker sticking sheet characterized by having a flat portion 22 and an air flow path 23. 2. A sucker sticking sheet according to claim 1, wherein said flat portion is made of a flexible resin. 3. The sucker sticking sheet according to claim 1, wherein said air flow path is made of a flexible resin.