JP3407249B2 - Film sheet having an ink receiving layer surface and a removable adhesive layer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides an ink receiving layer capable of forming a high-resolution / high-density image on one surface of a base film by a copying technique, and re-peeling on the other surface by a printing method. Film sheet with adhesive layer or viscoelastic layer with adhesive property, especially soft and free from glare due to electrophotography, but capable of forming color images with good resolution. The present invention relates to a film sheet capable of forming a desired color image to make a product such as a mouse mat.

[0002]

2. Description of the Related Art Conventionally, it is known to form a coating layer containing a white pigment having an average particle diameter of less than 5 μ on the film surface in order to impart a function such as printability to the film sheet. The film sheet on which the coating layer is formed is of such a degree that a practically usable image can be formed by using a conventional advanced printing method. In addition, the image created in this way is not sufficient for diffusing the light, unless it is attached to a glass surface equipped with a backlight for use as a display for POP, signboards, etc. There is an inconvenience that the shape of the light source of the backlight looks thin on the display surface. Therefore, the conventional film sheet can almost satisfy the characteristics such as resolution and image density as a material for forming an image by a printing method for producing a large amount of printed matter, but it does not feel glaring due to an electrophotographic method. However, it was not sufficient as a film sheet capable of obtaining a color image with good resolution.
In particular, it was not suitable as a film sheet for forming a display image because of its poor light diffusion. Also,
They did not combine the functionality of dinner sheets and mouse mats.

[0003]

Under such a technical situation of the film sheet for image formation, there is a case where only a small amount of image for display may be obtained in an extreme case. . In such a case, there has been a demand for a film sheet capable of forming an image of a quality that can be used for display by a simple copying technique. For example, there is a case where a small amount of advertising billboards, POPs, illuminated billboards, etc., which are provided in aisles, etc., are desired immediately. In such a case, there has been a demand for a film sheet that can immediately produce a necessary display image by a technique such as a simple copying machine that is familiar to us.

Further, in the development of a film sheet on which an image can be formed by such a simple copying technique, even a so-called personal use product is provided with a differentiated image or pattern, particularly a color image or pattern. I've come to ask for something that has been given. For example, there has been a growing demand for a film sheet that can be made by patterning a personal-use daily life product such as a dinner sheet and a mouse mat by a simple copying technique. It is an object of the present invention to provide a film sheet having a quality that can meet such social needs. In particular, it is an object of the present invention to provide a film sheet which can be patterned by making a personal use life product such as a mouse mat or a dinner sheet by a simple copying technique.

[0005]

In order to solve the problems of the present invention, it is keenly understood how to modify the surface of a film sheet by a copying technique so as to form an image of the desired image quality. As a result of repeated examinations, a urethane resin, which is a sphere having an average particle size of 5 to 40 μm, is formed on the surface of the base film.
15-35% by weight of lipid beads for ionizing radiation and actinic rays
By using an ink blended with an ink base containing a more solidifying component and forming a layer having a thickness of 5 μ to 100 μ by a printing method, particularly a screen printing method, an image can be obtained by the copying technique of the above problem. I found out that

In addition, in the above-mentioned study, by blending the spherical beads in the receiving layer, particularly by blending urethane resin beads, a desired image is formed on the ink receiving layer by a copying technique such as electrophotography. Even after this, the surface of the film sheet can be easily moved by a mouse or the like, and a surface having abrasion resistance can be obtained, and a film sheet capable of forming a color image with good reproducibility by a copying technique can be obtained. Do you get it. And by providing the above-mentioned receiving layer, light scattering (diffusibility)
It was found that it was possible to obtain a higher quality display image because the backlight became invisible and the shape of the backlight disappeared. Although there was no difference in shape, it was surprising that the effect of improving the optical properties such as light scattering properties was remarkable when urethane resin beads were used. Further, the color image obtained was also excellent in light resistance and weather resistance.

Furthermore, by using a printing ink in which a component which is solidified by ionizing radiation is added to the base of the ink containing the urethane resin beads or the like, a film sheet having further improved abrasion resistance can be obtained. When the product is cut into the shape of the product, for example, the size of the mouse mat, the purchaser of the product can obtain the mouse mat or the like having a desired image or pattern by copying means.

[0008] When used as a product such as a mouse mat, the removable mat can be fixed on the surface not having the ink receiving layer so that the mouse mat can be peeled off to the surface of a desk or the like by a printing method. Forming an adhesive layer or a viscoelastic layer having properties has the advantage that the sheet can be temporarily fixed to the desired surface, and has the effect of improving the function of the application of the film sheet such as a mouse mat. .

Therefore, the gist of the present invention is to ionize 15 to 35% by weight of urethane resin beads, which are spheres having an average particle size of 5 to 40 μm, on one surface of a base film by a printing method.
A thickness of 5 μ to 100 is obtained by using an ink blended with an ink base containing a component that is solidified by radiation and actinic rays.
A film sheet in which an ink receiving layer capable of forming an image is formed by a copying technique of μ, and a pressure-sensitive adhesive layer or viscoelastic layer having removable adhesiveness is formed on the other surface of a base film by a printing method. .

In the present specification, the term "copying technique" means a technique, such as electrophotography, ink jet recording, thermal transfer, etc., in which an image is formed using toner, electrostatic toner, etc. This is distinguished from gravure printing, which is performed by using a printing press.

[0011]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described with reference to the drawings. In the present invention, as the base film 2, a synthetic resin film such as a polyester film, an acrylic film, a polycarbonate film, a polyolefin film, or a thin metal film can be used. The polyester film is excellent in mechanical strength, dimensional stability, and thermal stability, and the acrylic film is excellent in transparency. Therefore, it is necessary to select the base film to be used in relation to the intended use of the film sheet. Before forming the ink receiving layer, these substrate films may be subjected to a treatment for improving the adhesion of the substrate film to the ink, for example, corona discharge treatment.

The resin used as the base for making the ink composition can be selected in relation to the material used as the substrate film. For example, when a polyester film is used as the base film, a polyester resin is used as the ink base resin, and a vinyl chloride-vinyl acetate copolymer is used when the acrylic film is used. A strong bond can be formed with the layer. In addition, as the ink base, one having good acceptability of image forming ink in relation to copying technology, for example, one having good acceptability of water-based ink because electronic ink is used in ink jet recording technology, Since a heat fixing toner is used in the photograph, it is important to select a toner having a good acceptability when the toner is heat fixed.

If an ink base containing a component that can be solidified or hardened by polymerization, crosslinking or the like with ionizing radiation such as electron beam and actinic ray such as ultraviolet ray is used, the ink receiving The formation of layers can be made relatively easy. Such ink bases include those containing a water-soluble monomer, those containing a water-insoluble monomer or a component capable of crosslinking in the form of a solution or emulsion, and all of them have the ink-receiving layer of the present invention. It can be used for producing an ink composition for obtaining a formed film sheet. Examples of the water-soluble monomer that is solidified or cured by ionizing radiation include (meth) acrylic acid esters of polyhydric alcohols, (meth) acrylic acid esters of N-alkylamino alcohols, polyethylene glycol (meth) acrylic acid esters, and N-alkyls. (Meth) acrylic acid amide, vinyl ether of polyhydric alcohol, etc. can be mentioned. Examples of the water-insoluble monomer include 1,6-hexanediol diacrylate, tripropylene glycol diacrylate, neopentyl glycol diacrylate, vinyl caprolactam, 2-ethylhexyl acrylate and the like.

The beads to be mixed with the ink for forming the ink receiving layer are preferably spherical and have a narrow particle size distribution, such as glass beads, silicone resin, urethane resin,
Resin beads made of urea resin, nylon, polyolefin, fluororesin or the like can be used. Although the blending of beads improves the image forming characteristics of the ink layer surface by the copying technology, the film sheet on which the ink receiving layer is formed by using urethane resin beads has better movement of the mouse and is a mat when using the mouse. The effect that the surface is less worn and the surface is not scratched is obtained, and an image with better color reproducibility can be formed than when beads made of other materials are used.

The beads have a particle size of 5 μ-40
μ, preferably 10 μ to 30 μ, more preferably 20 μ
~ 30μ urethane resin beads are used, ionizing radiation
And 15 to 35% by weight of an ink base containing a component that is solidified by actinic rays , and the layer formed by the ink causes the resolution, density and color reproducibility of an image formed by a copying technique. It is possible to improve the image forming characteristics of If the particle size is less than 5 μm, the image quality of the image formed by the copying technique is not improved, and if it is greater than 40 μm, the light diffusion effect is small, the surface friction is large, and the surface is apt to be scratched.

The thickness of the ink receiving layer formed on the surface of the film by the ink is set to 5 μ to 100 μ, preferably 10 μ to 80 μ in order to achieve the object of the present invention. And, by adjusting the thickness of the layer, the light transmittance, diffusivity, image characteristics, etc. are changed. Therefore, it should be appropriately adjusted within the above range depending on what kind of display is used and the intended use. You can

The ink composition for forming the ink receiving layer has an average particle size of 1 to 1 which improves the acceptability of the ink jet ink without deteriorating the characteristics of the receiving layer and the formability of the layer.
Natural fiber powder or protein powder of about 20 μm may be added, and components such as white pigments, colorants, and leveling agents that have been conventionally added to inks can be obtained with high resolution and high resolution by the ink receiving layer copying technology. It can be blended within a range that does not deteriorate the characteristics capable of forming a density image.

The adhesive layer or the viscoelastic material layer having a removable adhesive property which can be fixed to a flat surface so that it can be peeled off is an ink such as urethane resin, epoxy resin, silicone resin or vinyl chloride resin. The base is blended with a curing agent, a plasticizer, a solvent and other additives to adjust flexibility and flexibility to prepare an ink composition, and an appropriate printing means, preferably screen printing, is performed using this ink composition. It can be formed by a method. As a preferable ink composition, a UV-curable pressure-sensitive adhesive composition that is cured by ultraviolet rays or the like to form a solid layer exhibiting removability and adhesion, for example, an average molecular weight of about 1000 to 12000, and a particularly preferable average molecular weight is An oligourethane (di) acrylate of about 3000 to 10000 (a molecular weight of this range is a preferable range for making an ink composition), a monofunctional monomer such as H ₂ C═CH—C (═O) —O ( C ₂ H ₄ −
O) _n- PH-R ₁ (n = 1 to 5, R ₁ = C _{1 to} C ₁₅
Of a hydrocarbon ink, a PH = phenylene group), and a compound (photoinitiator) that generates an active species that undergoes a polymerization reaction, a crosslinking reaction, and a curing reaction due to ultraviolet rays and the like. This is preferable in that a layer of the composition can be formed on the surface of the base sheet and an adhesive layer having a solid releasable sticking property can be formed by irradiation with ultraviolet rays after the formation of the layer. Commercially available ink compositions having the above-mentioned properties include UV manufactured by Teikoku Ink Mfg. Co., Ltd.
Examples include QVN-000 medium, UV QVN-70425 special medium, QVN-000 medium and the like.

FIG. 1 is a plan view showing an embodiment of a base film 2 having an adhesive layer or viscoelastic layer 3 having a removable adhesive property and an ink receiving layer 1 of the present invention. An image is formed by toner. FIG. 2 is a sectional view taken along the line AA of FIG. FIG. 3 is a bottom view of the film sheet of the present invention in which an adhesive layer or a viscoelastic layer 3 (removable adhesive layer) having a removable adhesive property is provided, and FIGS. Fig. 3 shows one printing mode of the re-peeling adhesive layer from which is removed. The printing mode of the re-peeling adhesive layer can be modified in various ways.

Further, the film sheet of the present invention may be provided with a release paper 5 which covers the re-peeling adhesive layer so that it can be released. In this case, since the adhesive layer is covered with the release paper, careless application of the adhesive layer is prevented.

[0021]

[Examples and Comparative Examples] Reference Example (showing the image forming characteristics of the ink receiving layer and the operability of a mouse) 18 as a base material (2)
A polyester film with a thickness of 8μ is used.
An ink receiving layer 1 is formed on one surface of the film by using an ink composition containing the following components as main components. Ink composition Beads: 25 g of urethane resin beads having an average particle size of 25 μ (25% by weight in 100% by weight of ink) Ketone solvent 10 g Hydrocarbon solvent 20 g Polyester resin 30 g Titanium pigment 35 g Auxiliary agent (silicone oil etc.) 5 g Ink acceptance Layer formation and its properties Screen used 150 mesh Ink-receiving layer thickness 30μ Image formation Color image formed by electrophotography Evaluation of formed image Glossiness (glare), soft feeling of image, The resolution and color reproducibility were compared with the original. A subject (evaluation panel) psychologically evaluated each characteristic, and added 3 points for good, 2 points for normal, and 1 point for bad. ◯: Addition point is 11 or more Δ: Addition point is 10 to 8 ×: 7 or less Evaluation results are shown in Table 1.

Reference Example 1 A re-peeling adhesive layer 3 was formed on the surface of the substrate 2 used in the reference example opposite to the surface on which the ink receiving layer 1 was formed, and the following UV-curable coating ink composition was used. It was formed by applying it uniformly by screen printing and then irradiating it with ultraviolet light to cure it.

Composition of UV curable ink. Oligourethane-based acrylate: 30.0-60.0% Epoxy-based monomer: 8.0-15.8 % Ester-based monomer ... 25.0 to 30.0% Acetophenone-based photoinitiator ... 3.0 〜8.0% Acylphosphine oxide ・ ・ ・ ・ ・ ・ ・ ・ ・ 3.0-8.0% Elastomer ・ ・ ・ ・ 1 0 to 10.0% Defoaming agent that does not contain silicon typified by acrylics, etc. 1.0 to 3.0% Polymerization inhibitor ... ... 0.1% In the step of applying the coating ink, an undercoat layer is provided in advance on the base material 2, and the coating ink is applied on the undercoat layer. Fabric to be formed the removable lamination adhesive layer 3. On the back surface of the film sheet coated with the coating ink, for example, the sheet cut into the shape of a mouse mat, the re-peeling adhesive layer 3 made of a viscoelastic material is uniformly formed. The adhesive force enables the mouse mat to be fixed to the object, that is, in the state of being attached to the desk. Therefore, even when this mouse mat is laid on a smooth desk with very low frictional resistance, the mouse mat does not slip and move when the mouse is moved and operated as in the past. . Therefore, the movement amount of the mouse can be accurately transmitted to the personal computer. Repeated sticking-peeling on the glass plate surface even after 10,000 times. The sticking / peeling characteristics were good. In addition, stains (adhesive residue phenomenon) on the adhered surface were also small.

Further, since the coating ink is applied by using a printing technique, after being applied flush to an accurate position,
It is fixed to form a flat adhesive layer. Therefore, the adhesion to the desk can be improved as compared with the case where the adhesive layer is not formed flush. Furthermore, since the coating ink is applied by screen printing, it can be applied thicker than when it is applied by another printing method, whereby the adhesive layer can be formed thicker. it can. In this case, the adhesiveness of the adhesive layer to the desk can be increased by pressing the adhesive layer on the desk. In addition, if the adhesive layer is not formed at a corner of a mouse mat or the like, it can be peeled off even if the adhesive force of the adhesive layer is increased, so that the fixing force of the mouse mat or the like can be improved. it can. Further, since the adhesive layer produces an adhesive force by being brought into close contact, the mouse mat can be attached to a wall surface of glass or the like when not in use.

On the other hand, the film sheet cut into the product such as the mouse mat is provided with a release paper which covers the adhesive layer so that it can be peeled off. For example, the mouse mat is housed in a vinyl bag. At the time of shipping, careless sticking of the sticking layer provided on the mouse mat or the like to the vinyl bag can be prevented. Therefore, the efficiency of shipping work can be improved.

Further, although the case where the coating ink is screen-printed has been described in the present embodiment,
For example, the coating ink may be applied by another printing method such as gravure printing or flexographic printing, or a printing method using a roll coater. In this case,
An ester-based monomer or an ether-based monomer is added to the coating ink so that the viscosity of the coating ink is 0.1 to 10
%. As a result, the coating ink can be applied to the base material 2 at a high speed, so that a large amount of mouse mats or the like having an adhesive layer formed thereon can be produced in a short time, which reduces the manufacturing cost of the mouse mats or the like. It can be reduced.

Reference Example 2 The ink receiving layer was formed in the same manner as in Reference Example. A UVQVN-70425 special medium ink composition manufactured by Teikoku Ink Mfg. Co., Ltd. was used to form a repetitive releasable adhesive layer having a repeating pattern. The obtained film sheet was formed into a mouse mat shape, and a color image of a desired landscape was formed on the film sheet to obtain a mouse mat. Image formation and evaluation of the formed image were performed in the same manner as in Reference Example. The evaluation results are shown in Table 1. Rollability of mouse: Ease of positioning the pointer and rolling sensation of mouse were evaluated by a panelist by psychological evaluation. Scratchability of the film sheet surface: The surface scratches when the mouse was rolled 3000 times were visually observed. In each evaluation, ◯: good Δ: normal ×: bad The results are shown in Table 1. Repeated sticking-peeling on the glass plate surface even after 10,000 times. The sticking / peeling characteristics were good. In addition, stains (adhesive residue phenomenon) on the adhered surface were also small.

Example 1 A 188μ polyester film is used as a substrate. On one surface of the film, an ink composition containing the following components as main components is used to form an ink receiving layer. Ink composition Beads: Urethane resin beads having an average particle size of 25 μm 25 g Vinylcaprolactam 22.0 g Tripropylene glycol diacrylate 22.0 g Bifunctional urethane oligomer 30.0 g Acetophenone photoinitiator 8.0 g Titanium pigment 20.0 g Auxiliary agent (silicone oil, etc.) 5.0 g Formation of ink receiving layer and its characteristics Screen 150 mesh used Thickness of ink receiving layer 30μ Cured with an amount of ultraviolet light of 500 mJ / cm ² . Further, UV QVN-manufactured by Teikoku Ink Mfg. Co., Ltd. is provided on the surface of the above-mentioned substrate opposite to the surface on which the ink receiving layer is formed.
The 70425 special medium ink composition was used to form a releasable adhesive layer. The obtained film sheet,
A mouse mat was formed, and a color image of a desired landscape was formed on the mouse mat to obtain a mouse mat. Image formation and evaluation of the formed image were performed in the same manner as in Reference Example. The evaluation results are shown in Table 1. Rollability of mouse: Ease of positioning the pointer and rolling sensation of mouse were evaluated by a panelist by psychological evaluation. Scratchability of the film sheet surface: The surface scratches when the mouse was rolled 3000 times were visually observed. In each evaluation, ◯: good Δ: normal ×: bad The results are shown in Table 1. Repeated sticking-peeling on the glass plate surface even after 10,000 times. The sticking / peeling characteristics were good. In addition, stains (adhesive residue phenomenon) on the adhered surface were also small.

Example 2 Example 3 was repeated except that the following was used as the ink composition forming the re-sticking tackiness. Ink composition. Oligourethane diacrylate (average molecular weight 10000) · 35.0 parts by weight of monofunctional monomer _{H 2 C = CH-C (} = O) -O (C 2 H 4 -O) n -PH-R 1 (n = 2 _{, R 1 = C (-CH 3} ) 2 -C 6 H 5, PH = phenylene) ----- 59.0 parts by weight of acetophenone photoinitiator ....... 5.0 parts by weight auxiliary Agent (silicon oil, etc.) --- 1.0 part by weight with a film thickness of 15μ, screen printing 50% per unit area. UV irradiation after printing. Repeated sticking-peeling on the glass plate surface even after 10,000 times. The sticking / peeling characteristics were good. In addition, stains (adhesive residue phenomenon) on the adhered surface were also small.

Comparative Examples 1 and 2 Except when the particle diameter of the beads to be blended in the Reference Examples was set to 2μ which is smaller than 5μ (Comparative Example 1), and when the diameter of beads was set to 60μ larger than 40μ (Comparative Example). Example 1 was repeated. The evaluation results are shown in Table 1.

[0031]

[Table 1]

[0032]

As described above, the film sheet having the ink-receiving layer and the pressure-sensitive adhesive layer or the viscoelastic material layer having the removable sticking performance according to the present invention has improved image forming characteristics by the copying technique. Therefore, a desired color pattern or the like can be formed at any time by a copying technique, and an adhesive layer or a viscoelastic material-attached portion is formed on the back surface of the film sheet. It can be fixed in the state of being stuck to the object by the adhesive force of the sticking part. Therefore, even when this film sheet or the like is laid on a smooth desk with a very small frictional resistance, the film sheet or the like is fixed in the state of being stuck on the desk. Moreover, the mouse mat does not slide and move. Therefore, the movement amount of the mouse can be accurately transmitted to the personal computer.
Further, since the adhesive layer is composed of an adhesive layer or a viscoelastic body, the mouse mat can be easily peeled from the desk, and the adhesion and peeling can be repeated.

[Brief description of drawings]

FIG. 1 is a plan view of a film sheet according to an embodiment of the present invention.

2 is a cross-sectional view taken along the line AA of the film sheet of FIG. 1 according to an embodiment of the present invention.

FIG. 3 is a bottom view of the film sheet according to the embodiment of the present invention.

FIG. 4 is a sectional view of the film sheet with the release paper removed.

FIG. 5: Regular pattern shape re-peelable adhesive layer formed on the entire surface of the base film

[Explanation of symbols]

1 Ink Receiving Layer 2 Base Film 3 Removable Adhesive Layer (Adhesive Layer or Viscoelastic Layer with Removable Adhesive Property) 4 Copy Ink 5 Release Paper

─────────────────────────────────────────────────── --Continued front page (56) References JP-A-8-176428 (JP, A) JP-A-8-230313 (JP, A) JP-A-9-188546 (JP, A) JP-A-9- 254329 (JP, A) Actual development Sho 63-119066 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G09F 3/02 B32B 27/20 B41M 3/12 B41M 5/00 G09F 3/10

Claims (10)

(57) [Claims] 1. A urethane resin bead, which is a sphere having an average particle size of 5 μm to 40 μm, is applied to one surface of a base film by a printing method in an amount of 15 to 35% by weight by ionizing radiation and actinic rays.
An ink-receiving layer capable of forming an image by a copying technique having a thickness of 5 μ to 100 μ is formed by using an ink mixed with an ink base containing a solidifying component, and the other surface is removable by a printing method. A film sheet having a pressure-sensitive adhesive layer or a viscoelastic material layer formed thereon. 2. The film sheet according to claim 1, wherein the adhesive layer or the viscoelastic layer is a layer printed on the entire surface. 3. The film sheet according to claim 1, wherein the adhesive layer or the viscoelastic layer is a partially printed layer. 4. The film sheet according to claim 3, wherein the partial printing is a regular pattern shape formed on the entire surface of the base film. 5. A film sheet according to any one of claims 1 to 4, characterized in that Ru form a pressure-sensitive layer or viscoelastic layer having removability bonded wear resistance using screen printing as a printing method. Film sheet according to any one of claims 1 to 5 wherein the film sheet is characterized in that which is cut in the shape of a given application. 7. The film sheet according to claim 6 , wherein the predetermined use is a mouse mat. 8. A film sheet according to any one of claims 1 to 7, characterized in that the release paper covering the adhesive layer or viscoelastic layer provided so releasably. 9. The pressure-sensitive adhesive layer or viscoelastic body layer having removable adhesiveness is formed by a liquid ink composition which forms an adhesive solid layer by ultraviolet curing. The film sheet according to any one of 1 to 8 . 10. The film sheet according to claim 9 , wherein the liquid ink composition for forming an adhesive solid layer by ultraviolet curing mainly contains a monofunctional monomer, oligourethane diacrylate and an ultraviolet initiator.