JP2003266914A - Printed matter whose image surface is protected and method for producing the print - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a good, non-tacky print in which the surface of an image by ink-jet recording is well protected and a printed matter having back light excellent in light resistance. <P>SOLUTION: The printed matter is obtained by laminating a transparent film layer containing a thermoplastic resin 0-120°C in glass transition temperature as a main component on the surface of the ink receiving layer of a recording medium in which the image by ink-jet recording is formed so that the thickness of the layer from the uppermost part of the ink receiving layer is 15 μm or below. Especially, in the printed matter having the transparent film layer of an ultraviolet absorbing polymer, the printed matter having back light is made by setting the back light. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed matter having an image surface protected by ink jet recording and a method for producing the same. Further, the present invention relates to an image-protected printed matter having a backlight useful as an exhibit.

[0002]

2. Description of the Related Art Printed matters have been conventionally produced by offset printing, screen printing, gravure printing or the like using an oil-based ink containing a pigment having weather resistance, and are still widely used. However, along with the development of electronic devices, a method using an inkjet recording for capturing an image in a personal computer or the like has recently been developed. Since the printing by the ink jet recording can be easily applied to the printing of a small number of copies, it has been attempted to be used for general-purpose printing.

By the way, in the case of ink jet recording, the ink is almost always water-based, and its density is limited in order to prevent the nozzles from being clogged when jetting. Therefore, it is necessary to apply a certain amount of ink to the image surface in order to increase the print density. In particular, in the case of general-purpose printing, the image surface needs to be quickly dried in order to prevent screen contamination due to easy printing. Improvement of the recording medium itself to meet the purpose,
That is, an attempt has been made to form an ink receiving layer on the base material of a recording medium that is quickly absorbed without the jetted ink droplets being diffused.

In printing by ink jet recording, it is possible to form an image on a recording medium by ejecting fine droplets, so that it is possible to achieve an image quality comparable to silver halide photography and multicolor printing. Therefore, it has been attempted to provide a transparent film layer on the ink receiving layer and print on it, and photographic paper substitute paper suitable for this purpose is commercially available for personal computers.

In the case of this photographic printing paper substitute paper, after printing by ink jet recording, it is necessary not to rub the image surface until it is wet with ink droplets and dries, and it takes a considerable time until the printed material is completed. Was.

[0006] Further, when it is used for a long time such as posters, guide displays, etc., for printed matter by ink jet recording, weather resistance (light resistance, water resistance, ozone resistance, etc.) is required. By the way, many ink jet recording inks use water as a main solvent as described above, and in order to improve ink jet performance, a water-soluble dye / pigment or an ultrafine and good solvent-dispersible dye / pigment is used as a colorant. Has been. For this reason, the image surface of the printed matter due to ink jet recording is likely to be deteriorated by light, flowing with water, and deteriorated by ozone.

Furthermore, when the base material of the recording medium is made transparent so that the printed matter can be seen from both sides, or when the printed matter is used for display by projecting light from the side opposite to the side where the image is viewed. In a light application), since the printed matter receives light from both sides, the photodegradation on the image side of the printed matter due to ink jet recording is not significant.

Therefore, it has been attempted to laminate a transparent film layer on the image side. In particular, a laminate member in which a film layer containing an ultraviolet absorbing polymer as a main component is laminated on a substrate made of a heat-resistant resin film, and the film layer containing the ultraviolet absorbing polymer as a main component is transferred to the image surface is a countermeasure for these problems. Which is excellent as
0-233474).

[0009]

When a film layer is formed on the image surface on which ink jet recording is performed, as described above, the ink for ink jet recording contains a large amount of solvent, so that the ink receiving layer is formed on the recording surface of the recording medium. Is required
The recording medium has to be thick, and therefore the adhesion strength between the ink receiving layer and the film layer for protecting the image surface is likely to cause a problem. In addition, when a transparent film layer is laminated on the image surface using the laminate member, then the base material of the laminate member is peeled from the transparent film layer, and a protective film for the transparent film layer is provided, tacking may occur on the surface in some cases. However, cracks may occur in the transparent film layer due to bending or bending, which may cause a defect that the printed matter is spoiled.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an excellent print product which protects an image surface of an ink jet recording satisfactorily and has no tack, and further to provide a print product having a backlight excellent in light resistance. To provide.

[0011]

In order to solve the above-mentioned problems, the inventors of the present invention have made earnest studies and made a transparent film layer for protecting an image surface mainly containing a resin having a specific glass transition temperature range. It was found that, when used, it is possible to obtain a printed matter having no tack and sufficient protection of the image surface even if the recording medium having an ink receiving layer has an extremely thin layer, and finally completed the present invention.

That is, the printed matter of the present invention is (1) a printed matter in which a transparent film layer is laminated on an image surface formed by ink jet recording formed on an ink receiving layer of a recording medium, the transparent film layer comprising: Glass transition temperature 0
℃ ~ 120 ℃ thermoplastic resin as the main component, and
The thickness of the layer is 1 from the top of the ink receiving layer of the recording medium.
It is characterized by being 5 μm or less.

(2) A printed matter in which a transparent film layer is laminated on an image surface formed by ink jet recording formed on an ink receiving layer of a recording medium, wherein the transparent film layer comprises at least two layers, and the outermost layer is Glass transition temperature 0 ℃ -1
It is a layer containing a thermoplastic resin as a main component at 20 ° C., and the layer laminated on the ink receiving layer of the recording medium is a layer containing a thermoplastic resin as a main component having a glass transition temperature of −90 ° C. to 50 ° C. Further, the total thickness of the transparent film layer is 15 μm or less from the uppermost part of the ink receiving layer of the non-recording medium.

(3) The printed matter according to (1) or (2), characterized in that the ink receiving layer of the recording medium contains amorphous silica.

(4) The printed matter according to any one of (1) to (3) above, wherein the transparent film layer contains an ultraviolet absorbing polymer.

(5) The printed matter according to any one of (1) to (4), characterized in that the base material of the recording medium is a transparent or semitransparent resin film.

(6) The printed matter according to (5) above, wherein the transparent resin film of the substrate of the recording medium contains an ultraviolet absorber.

(7) The printed matter according to any one of (1) to (6) above, further comprising a light for applying light to a surface opposite to a surface on which an image is viewed. Characterize.

Further, the method for producing an image-protected print according to the present invention is heat-resistant in the production of an image-protected print described in any of (1) to (6) above. A transparent resin film layer having a resin layer mainly composed of a thermoplastic resin having a glass transition temperature of 0 ° C. to 120 ° C. formed on a resin film is used as an ink receiving layer of a recording medium on which an image is formed. It is characterized by transferring.

[0020]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic cross-sectional view of a typical print product of the present invention.

In the print 1 of the present invention, an ink receiving layer 102 is formed on a substrate 101 of a recording medium 10, and an image (not shown) is formed on the ink receiving layer 102 by ink jet recording. . On the ink receiving layer 102 on which the image is formed, a transparent film layer 103 made of a resin having a glass transition temperature of 0 to 120 ° C. and having a glass transition temperature of 15 μm or less is provided from the top of the ink receiving layer 102. In addition,
The transparent film layer 103 is a resin layer having a glass transition temperature of −90 ° C. to 50 ° C. in a portion laminated on the ink receiving layer in order to increase the adhesiveness with the ink receiving layer 102, and a glass transition temperature of 0 ° C. on the resin layer. A resin layer having a temperature of up to 120 ° C may be provided. Further, a third resin layer may be provided between these resin layers in order to enhance the mutual adhesion.

The base material of the recording medium may be any one if it is in the form of a thin sheet, for example, paper materials such as high-quality paper, coated paper, laminated paper, polyethylene, polyethylene terephthalate (PET), polypropylene (P
Examples thereof include transparent or opaque films made of polymers such as P). The thickness is usually 50-
150 μm is suitable. In particular, a transparent or semi-transparent polymer film is recommended for use as a backlight or a poster for double-sided display. For such applications, it is preferable to add stabilizers such as an ultraviolet absorber and a heat stabilizer to the base film. In particular, it is preferable to include an ultraviolet absorber because light resistance of the ink jet recording screen can be achieved.

The ink receiving layer of the recording medium may be formed of a swelling water-soluble polymer such as polyvinyl alcohol, urethane, or acrylic, but is formed of porous inorganic fine particles as a main component. Is preferable from the viewpoints of the fixability of ink for forming an image by jet ejection and the absorbability of a solvent. Examples of the porous inorganic fine particles that can be used here include silica, alumina, magnesium carbonate, calcium carbonate, silica-alumina mixed crystal, silica-magnesia mixed crystal, kaolin, diatomaceous earth, and talc. Economically, silica, among them, amorphous Quality silica is preferred. Examples of such silica include Fineseal X-60 (trade name,
Tokuyama Co., Ltd. and Mizukasil P-50 (trade name, Mizusawa Chemical Industry Co., Ltd.) can be mentioned as suitable ones.

When forming the ink receiving layer, a binder may be used if necessary. As a binder, for example,
Water-soluble polymers such as polyvinyl alcohol, urethane and acrylic, and other emulsions can be used. The compounding ratio of the porous inorganic fine particles and the binder is selected from the range of 10 to 200 parts by weight, preferably 25 to 100 parts by weight, based on 100 parts by weight of the porous inorganic particles.

Further, various additives such as a dispersant, a fluorescent dye, a pH adjusting agent, a lubricant, and a surfactant can be added to the ink receiving layer, if necessary.

The layer thickness of the ink receiving layer is, for example, 15 to 60.
The range of μm is suitable and is appropriately selected depending on the purpose of use of the printed matter.

The ink receiving layer can be obtained by applying a coating liquid containing a binder, if necessary, on the surface of the base material of the recording medium and drying it. The coating can be performed by a known method such as a roll coating method, a rod bar coating method, and a slot die coating method.

The transparent film layer formed on the ink receiving layer is a thermoplastic resin having a glass transition point of 0 ° C. to 120 ° C.
For example, it is a layer containing an acrylic resin, a vinyl chloride / vinyl acetate copolymer resin, a styrene resin or the like as a main component. If the glass transition temperature is lower than 0 ° C, the surface of the resulting printed matter tends to be sticky and dusty, and if it exceeds 120 ° C, tack tends to occur. Although the layer thickness varies depending on the recording medium, it is usually desirable that the layer thickness is 15 μm or less from the uppermost part of the ink receiving layer. The layer thickness is 15
If it exceeds μm, tack may occur even if the thermoplastic resin having the above glass transition temperature is mainly used.

FIG. 2 shows a schematic view of an example of an apparatus for carrying out the step of forming the transparent film layer of the print according to the present invention.

The recording medium 10 is wound around a roll 11 and has an ink jet recording section 2 for performing ink jet recording on the ink receiving layer surface of the recording medium 10 and a laminating section 4 for forming a transparent film layer. The inkjet recording unit 2 has an inkjet recording head 21 and applies ink to the ink receiving layer 102 of a recording medium according to image information to form an image. After forming the image, the cutter 3 cuts the image into a predetermined size.

Next, the laminate member 40 having the structure shown in FIG.
In the state where the transparent film layer 103 laminated on No. 01 faces the ink receiving layer 102 surface of the recording medium 10 cut into a predetermined size and the transparent film layer 103 face each other,
Of the pair of pressure rollers 4
It passes through 3 and is pressurized with heating if necessary. By this process, the transparent film layer 103 is pressure-bonded to the ink receiving layer 102.

Then, after passing through the second guide roll 44,
Transparent film layer 103 pressure-bonded to the ink receiving layer 102
The heat-resistant base material 401 alone is pulled by the take-up device 5 to remove the heat-resistant base material 401, and the take-up roll 6 removes the heat-resistant base material 401 of the laminate member, and the remaining print product 1 is taken up. To obtain a printed matter 1 protected.

In this description, the recording medium is continuous, and the transparent film layer is laminated by cutting the recording medium. However, the recording medium is cut into a predetermined size before printing. The transparent film layer may be laminated and then cut into a predetermined size.

The laminate member 40 will be described with reference to FIG.

The laminate member 40 is made of a heat resistant substrate 401.
And a transparent film layer 103.

The heat-resistant substrate 401 is the ink receiving layer 1
When the thermo-compression bonding of the transparent film layer 103 to 02 is performed, the shape of the transparent film layer 103 is stably maintained under heat and pressure, and the surface of the transparent film layer 103 that appears after being laminated is protected until the lamination is completed. It is preferable that it can be easily peeled from the transparent film layer after the lamination is completed. For example, a film or sheet made of a material such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyphenylene sulfide (PPS), or polyether sulfone (PES) can be used. The thickness may be a thickness suitable for the laminating process, and can be appropriately selected from the range of 25 to 50 μm.

The transparent film layer 103 is a heat resistant substrate 40.
1 needs to be made of a material that can be brought into close contact with the ink receiving layer 102 when heated and pressed at a temperature that maintains a stable form and does not leave tack at room temperature after transfer, and has a glass transition temperature of 0 ° C. It is preferably in the range of to 120 ° C. As a material satisfying this condition, for example,
Vinyl chloride vinyl acetate type, styrene type, and acrylic type thermoplastic resins can be mentioned.

It is also preferable that the transparent film layer has two or more layers. The low glass transition temperature resin film layer of −90 ° C. to 50 ° C. is used as an adhesive layer with the ink receiving layer 102, and the high glass transition temperature resin film layer of 0 ° C. to 120 ° C. is provided on the adhesive layer to further improve the ink receiving property. The transparent film layer firmly adheres to the layer. Further, the high glass transition temperature resin film layer of 0 ° C. to 120 ° C., which is the surface of the printed matter, is a layer that contributes to the no-tack property.

It is preferable that at least one of the transparent film layers contains an ultraviolet absorber. Since the ultraviolet absorbent bleeds out over time, the light resistance is deteriorated, and the surface is easily soiled, it is more preferable to use the ultraviolet absorbent polymer in which the ultraviolet absorbent is chemically bonded to the thermoplastic resin. As such an ultraviolet absorbing polymer, for example, a UV polymer (PUVA-30M, trade name, Otsuka Chemical Co., Ltd.) can be mentioned.

The transparent film layer 103 is prepared by mixing a thermoplastic resin with an appropriate solvent as needed to prepare a coating solution, and applying the coating solution on the heat resistant substrate 401 to a predetermined film thickness. It can be obtained by coating so as to obtain and drying. As a coating method, for example, a roll coating method, a rod bar coating method, a slot die coating method, a microgravure coating method, or the like can be used.

The film thickness of the transparent film layer 103 may be such that the film thickness from the top of the ink receiving layer is 15 μm or less after formation of the printed matter, and porous inorganic fine particles are used for the ink receiving layer. In this case, since the transparent film layer flows into the spaces between the fine particles, the coating thickness of the transparent film layer on the heat resistant substrate 401 may be 15 μm or more.

A schematic cross-sectional view of the printed matter provided with the backlight is shown in FIG.

Printed matter 7 provided with the backlight of the present invention
Then, a light source 72 protected by an outer case 71 from the side opposite to the side where the image is visually recognized is provided on the print 1 having a transparent film layer laminated thereon.
Illuminate with light. In this figure, a light reflecting surface 73 is provided on the back surface of the light source 72. The position of the light source 72 with respect to the print 1 may be on the base material side of the recording medium or the transparent film layer side, but when the base material of the recording medium is semitransparent, a light is provided on the base material side. Is desirable. Further, the printed matter may have a film for further protection or a glass plate for reinforcement.

[0045]

The present invention will be described in detail below with reference to examples.

Example 1 Production of Recording Medium Polyvinyl alcohol (trade name: PVA235, manufactured by Kuraray Co., Ltd.) was dissolved in ion-exchanged water, and 60 parts by weight of a solution having a concentration of 10% by weight was mixed with silica (Fineseal X-6).
0, manufactured by Tokuyama Corporation) 8 parts by weight and 3 parts of ion-exchanged water
2 parts by weight were mixed and stirred to obtain an ink receiving layer coating liquid. This coating solution was applied to a basis weight of 105 g / m ² (thickness 115
(μm) high quality paper (manufactured by Oji Paper Co., Ltd.) was coated with a slot die coater so that the film thickness after drying was 50 μm, and dried to obtain a recording medium having a thickness of 165 μm.

Production of Laminate Member As a heat resistant substrate, a polyethylene terephthalate film (thickness: 38 μm) is coated with an ultraviolet absorbing polymer (PUVA).
-15M, manufactured by Otsuka Chemical Co., Ltd., glass transition temperature 90
(° C.) so that the film thickness after drying is 10 μm, and after drying, acrylic emulsion (acrylic emulsion 2706, manufactured by Nisshin Chemical Co., Ltd., glass transition temperature 22).
(° C.) Was applied by the slot die coating method so that the film thickness after drying was 5 μm, and dried to obtain a laminated member.

An image was formed on the recording medium manufactured as described above with an ink jet printer (BJF8500, manufactured by Canon Inc.), and the transparent film layer side of the laminated member manufactured above was heated at 140 ° C. to a diameter of 80 m.
m steel roll, 50 mm diameter rubber roll heated at 140 ° C. on the heat-resistant substrate side, nip load 120 N / cm,
After thermocompression bonding at a feed rate of 10 mm / sec, the heat resistant base material of the laminate member was peeled off to obtain a printed matter having a thickness of 171 μm. The obtained printed matter had a clean surface, no tack, no cracking even when bent by φ5 mm, and good light resistance.

Comparative Example 1 (Example in which glass transition temperature exceeds 120 ° C.) In Example 1, instead of the ultraviolet absorbing polymer, polystyrene (Dick Styrene GP, Dainippon Ink and Chemicals, Inc., glass transition temperature 125 ° C.) A printed matter was obtained in the same manner as in Example 1 except that was used. The obtained prints did not have tack, but cracked when bent by φ5 mm.

Comparative Example 2 (Example in which the transparent film layer exceeds 15 μm) In the same manner as in Example 1 except that the film thickness after drying of the ultraviolet absorbing polymer was 20 μm, the thickness 1 was obtained.
An 81 μm printed product was obtained. The obtained prints did not have tack, but cracked when bent by φ5 mm.

[0051]

According to the present invention, a thin total film thickness can be realized even though a recording medium recorded by ink jet printing is provided with a transparent film layer which contributes to improvement of image quality and fastness.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a print product of the present invention.

FIG. 2 is a diagram schematically showing a main part of an example of an apparatus for producing a printed matter according to the present invention.

FIG. 3 is a schematic sectional view of a laminate member.

FIG. 4 is a cross-sectional view of a print product including a backlight.

[Explanation of symbols]

1 printed matter 10 Recording medium 101 Base material of recording medium 102 ink receiving layer of recording medium 103 transparent film layer 11 Recording medium holding and feeding roll 2 recording section 21 inkjet recording head 3 cutter 4 Lamination processing section 40 Laminated material 401 Heat resistant base material 41 Laminating member holding and feeding roll 42 First Guide Roll Pair 43 Pressure roll pair 44 Second guide roll pair 5 Winding device 6 pick-up roll pairs Printed matter equipped with 7 backlights 71 Outer case 72 Light source 73 Light reflection surface

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshi Ochiai             148-1 Kadozawabashi, Ebina City, Kanagawa Stock Association             Company lab F-term (reference) 2H086 BA05 BA12 BA15 BA19 BA31                       BA33 BA38                 5C096 AA29 BA01 CA02 CA12 CA28                       CA32 CB07 CC22 FA20

Claims (8)

[Claims] 1. A printed matter in which a transparent film layer is laminated on an image surface formed by ink jet recording formed on an ink receiving layer of a recording medium, wherein the transparent film layer has a glass transition temperature of 0 ° C. to 120 ° C. An image-protected printed product, which comprises a resin as a main component and has a film thickness of 15 μm or less from the uppermost part of the ink receiving layer of the recording medium. 2. In a printed matter in which a transparent film layer is laminated on an image surface formed by ink jet recording formed on an ink receiving layer of a recording medium, the transparent film layer comprises at least two layers, and the outermost layer has a glass transition temperature. 0 ℃ ~ 120
C. is a layer containing a thermoplastic resin as a main component, and the layer laminated on the ink receiving layer of the recording medium has a glass transition temperature of −9.
It is a layer containing a thermoplastic resin as a main component at 0 ° C. to 50 ° C., and the total thickness of the transparent film layer is 15 μm or less from the top of the ink receiving layer of the non-recording medium. Printed material whose image surface is protected. 3. The image-protected product according to claim 1, wherein the ink receiving layer of the recording medium contains amorphous silica. 4. The image-protected printed product according to claim 1, wherein the transparent film layer contains an ultraviolet absorbing polymer. 5. The image-protected product according to claim 1, wherein the base material of the recording medium is a transparent or semitransparent resin film. 6. The image-protected printed material according to claim 5, wherein the transparent resin film of the base material of the recording medium contains an ultraviolet absorber. 7. The image-protected printed material according to claim 1, further comprising a light for illuminating a surface opposite to a surface on which an image is viewed. 8. In the production of an image-protected printed product according to claim 1, at least a glass transition temperature of 0, which is formed on a heat-resistant resin film.
A printed matter having an image surface protected, characterized in that a transparent resin film layer having a resin layer containing a thermoplastic resin as a main component at a temperature of up to 120 ° C. is transferred to an ink receiving layer of a recording medium on which an image is formed. Manufacturing method.