JP2003276301A - Method for manufacturing recorded material with protective layer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a recorded material with a protective layer capable of smoothly detaching only a substrate without lifting and striping off a thermoplastic resin layer from a recorded face, and excellent in glossy feeling and image fastness property, in laminating treatment wherein the thermoplastic resin layer provided on the substrate is thermally bonded on the recorded face of a recording medium where an image is formed then the substrate is detached from the upper part of the thermoplastic resin layer so as to provide the protective layer comprising the thermoplastic resin layer. <P>SOLUTION: An adhesive liquid having a minimum film forming temperature of not higher than the minimum film forming temperature of a resin emulsion which constitutes the thermoplastic resin layer is driven into the recorded face of the recording medium by an ink jet system before thermally bonding the thermoplastic resin layer thereto. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a thermoplastic resin layer obtained by thermally transferring a thermoplastic resin layer provided on a support on a recording surface of a recording medium on which an image is formed by an inkjet method. The present invention relates to a method for producing a recorded matter with a protective layer.

[0002]

2. Description of the Related Art The ink jet method is a printing method in which ink droplets are ejected from minute nozzles in accordance with an image signal and adhered to a recording surface of a recording medium for printing. is there. Conventionally, for the purpose of improving glossiness, image fastness, smoothness, etc., after thermocompressing a thermoplastic resin layer supported by a support on a recording surface on which an image is formed by an inkjet method. There is known a laminating process in which the support is peeled off from the resin layer to provide a protective layer made of the resin layer (Japanese Patent Laid-Open No. 2000-2.
See 33474, etc.).

However, in the above laminating process, the adhesion between the recording surface and the resin layer may be insufficient depending on the material of the recording surface and the degree of unevenness. Therefore, the process of peeling the support In the above, there is a problem that a part of the resin layer is lifted up from the recording surface or, in severe cases, peeled off together with the support. The floating of the resin layer from the recording surface becomes a particular problem when an image is formed using pigment ink. That is, when the pigment ink is driven onto the recording surface, most of the colorant (pigment) does not penetrate into the recording medium and adheres to the recording surface. It is because the resin layer is taken up by the floating resin layer side, and as a result, image bleeding or peeling occurs.

Further, in Japanese Patent Laid-Open No. 2000-43368, as an improved technique relating to the above-mentioned laminating treatment, in order to obtain high adhesion between a protective layer (resin layer) and a recording layer (recording surface), the protective layer is provided. Also, a technique is disclosed in which a latex layer is provided on each of the recording layers, and the latex layers are heated and pressed against each other. However, in this technique, since the ink is applied to the recording layer through the latex layer, the coloring agent does not reach the recording layer, and there is a possibility that a good image density cannot be obtained. In particular, when a pigment ink in which the colorant has a certain size is used, the pigment as the colorant remains in the latex layer, which may result in insufficient image density. Further, since the recording medium is provided with a latex layer in advance, there is a possibility that the recording medium may stick to each other via the latex layer during storage of the recording medium, so-called blocking may occur, leading to a paper feeding trouble of the printer. .

Therefore, an object of the present invention is to subject a thermoplastic resin layer supported by a support to thermocompression bonding on a recording surface of a recording medium on which an image is formed, and then to perform the support from the resin layer. In a laminating process in which the body is peeled off and a protective layer made of the resin layer is provided, the support alone can be smoothly peeled off without lifting or peeling off the resin layer from the recording surface. Another object of the present invention is to provide a method for producing a recorded matter with a protective layer, which can provide a high-quality recorded matter excellent in glossiness and image fastness.

[0006]

According to the present invention, there is provided a step of forming an image on a recording surface of a recording medium by ejecting ink by an ink jet method, and a step of forming an image on the recording surface having the image formed on a support. The method for producing a recorded matter with a protective layer comprising the thermoplastic resin layer, which comprises a step of thermocompression-bonding the thermoplastic resin layer provided in, and peeling the support from the thermoplastic resin layer. Then, before thermocompression-bonding the thermoplastic resin layer, an adhesive liquid having a minimum film-forming temperature equal to or lower than the minimum film-forming temperature of a resin emulsion constituting the thermoplastic resin layer is applied to the recording surface by an inkjet method. The above object is achieved by providing a method for producing a recorded matter with a protective layer, which is characterized in that

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The method for producing a recorded matter with a protective layer according to the present invention will be described in detail below. The manufacturing method of the present invention includes an image forming step of forming an image by ejecting ink on a recording surface of a recording medium by an ink jet method, and a recording medium provided with the image on the support. And laminating step of peeling the support from the thermoplastic resin layer after the thermoplastic resin layer is heat-pressed.

According to the production method of the present invention, the thermoplastic resin having a minimum film-forming temperature (hereinafter referred to as MFT, according to JIS K6800) is formed on the recording surface before the thermoplastic resin layer is heat-pressed. It is characterized in that an adhesive liquid having a MFT of the resin emulsion constituting the layers or less is injected by an inkjet method. MFT of a resin emulsion that constitutes the thermoplastic resin layer, and MF of the adhesive liquid
The difference from T is preferably 0 to 100 ° C. The "resin emulsion" refers to an aqueous medium in which fine spherical resin particles are dispersed.

By driving such an adhesive solution onto the recording surface before the thermoplastic resin layer is heat-pressed, the resin component in the adhesive solution adheres to the recording surface, and the laminating step is performed. At the time of thermocompression bonding, the resin component melts and conforms to the irregularities of the recording surface, so that the thermoplastic resin layer (protective layer) and the recording surface are more likely than the case where the adhesive liquid is not injected. Adhesion with excellent adhesion can be performed.

The adhesive liquid will be described in more detail below.

The adhesive liquid is a resin emulsion.
The MFT of the adhesive liquid is not more than the MFT of the resin emulsion forming the thermoplastic resin layer, and in addition, the MFT itself is preferably in the range of 0 to 80 ° C, particularly 0 to 40 ° C. If the MFT of the adhesive liquid is less than 0 ° C., stable ejection from the jet nozzle may not be achieved, and 8
If it exceeds 0 ° C, the adhesive strength may be lowered. In order to adjust the MFT of the adhesive liquid in such a range, the resin contained in the adhesive liquid has a glass transition temperature (Tg) of
It is preferable to select one in the range of -20 to 80 ° C, particularly 0 to 40 ° C.

A thermoplastic resin is used as the resin contained in the adhesive liquid. Examples of preferable thermoplastic resins include acrylic resins, vinyl acetate resins, styrene-butadiene resins, isoprene-isobutylene resins, acrylic-styrene copolymer resins, and the like, and particularly acrylic resins and acrylic-styrene copolymer resins. It is preferable to use one kind or two or more kinds selected from the group consisting of from the viewpoints of adhesive strength, yellowing resistance and cost.

The weight average molecular weight of the above resin is preferably 50,000 to 800,000 from the viewpoint of the balance between ejection stability from the jet nozzle and good adhesion of the protective layer.

Further, as described above, the resin is dispersed as substantially spherical resin fine particles in the adhesive liquid, and the average particle diameter of the resin fine particles depends on the ejection stability from the jet nozzle and the adhesiveness. From the viewpoint, preferably 10
˜500 nm, more preferably 30 to 300 nm.

The content of the resin is preferably 0.1 to 50% by weight, more preferably 2 to 30% by weight, based on the weight of the adhesive liquid. If the content of the resin is less than 0.1% by weight, the effect of improving the adhesion between the protective layer and the recording surface is poor, and if it exceeds 50% by weight, ejection stability may be deteriorated.

As the water used as the dispersion medium for the adhesive liquid, it is preferable to use pure water or ultrapure water such as ion-exchanged water, ultrafiltered water, reverse osmosis water, and distilled water. Also, water that has been sterilized by ultraviolet irradiation or addition of hydrogen peroxide,
It is preferable in that it can be stored for a long period of time by preventing generation of mold and bacteria.

The adhesive liquid contains, in addition to the resin and water,
If desired, one or more of the following various additives may be contained.

It is preferable that the adhesive liquid contains a wetting agent in order to ensure stable ejection from the jet nozzle. Examples of the wetting agent include glycerin, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, 1,3-propanediol, 1,4-butanediol, 1 , 2-hexanediol, 1,5-pentanediol 1,6-hexanediol, 1,2,6-hexanetriol, thioglycol, hexylene glycol and other polyhydric alcohols;
Lactams such as 2-pyrrolidone, N-methyl-2-pyrrolidone and ε-caprolactam; ureas such as urea, thiourea, ethyleneurea and 1,3-dimethylimidazolidinone; maltitol, sorbitol, gluconolactone ,
Examples include sugars such as maltose.

Further, it is preferable that the adhesive liquid contains a penetrating agent from the viewpoints of penetrability into a recording medium and ejection stability. Examples of penetrants include methanol, ethanol, n-propyl alcohol, iso-propyl alcohol, n-butanol, sec-butanol, and te.
lower alkyl alcohols such as rt-butanol, iso-butanol, n-pentanol; ethylene glycol monomethyl ether, ethylene glycol monobutyl ether, diethylene glycol monoethyl ether,
Examples thereof include alkyl ethers of polyhydric alcohols such as diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monobutyl ether, propylene glycol monobutyl ether and dipropylene glycol monobutyl ether.

From the same point of view, the adhesive liquid contains
It is preferable to include a surfactant. Examples of the surfactant include anionic surfactants such as sodium dodecylbenzene sulfonate, sodium laurate, and ammonium salt of polyoxyethylene alkyl ether sulfate; polyoxyethylene alkyl ether,
Nonionic surfactants such as polyoxyethylene alkyl ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkylphenyl ether, polyoxyethylene alkylamine, polyoxyethylene alkylamide; Surfynol 82, 104, 44
0, 465, 485 (above, manufactured by Air Products and Chemicals), Olfin STG, Olfin E
1010 (above, manufactured by Nisshin Chemical Co., Ltd.) and the like, acetylene glycol-based surfactants; cationic surfactants; amphoteric surfactants and the like.

Other additives may be added to the adhesive solution.
A viscosity adjusting agent, an antiseptic, an antifungal agent, a pH adjusting agent, a dissolution aid, an antioxidant, an antifoaming agent, a surface tension adjusting agent, a dielectric constant adjusting agent and the like can be contained.

The amount of each of the above-mentioned various additives added is appropriately adjusted so that the adhesive liquid has the physical properties as a liquid medium suitable for the ink jet system. Preferred physical properties of the adhesive liquid (viscosity at 20 ° C., surface tension, pH)
Is as follows. Viscosity at a liquid temperature of 20 ° C; preferably 2-10 mPa ·
s, more preferably 3 to 5 mPa · s. Surface tension; preferably 20 to 44 mN / m, more preferably 25 to 38 mN / m. pH; preferably 7-11, more preferably 7.5-1
0.

The ejection of the adhesive liquid onto the recording surface is carried out by an ink jet method using a known ink jet printer as in the case of the ink ejection. The inkjet method includes a continuous method in which ink is continuously ejected from a nozzle at regular time intervals and an ejected ink droplet is deflected to form an image, and an on-demand method in which ink is ejected corresponding to image data. There is a method, and any method may be used, but the on-demand method is preferable from the viewpoint that fine driving control is possible and the amount of waste liquid is small. The ink ejection control method includes a method of controlling with a voltage using a piezoelectric element and a method of controlling with a heat energy using a heating resistor element, but is not particularly limited.

It should be noted that the ink injection and the adhesive liquid injection may be separately carried out by using independent ink jet printers, and one ink jet printer may be used to perform all the ink ejections in one pass. You may go. In the latter case, the ejection control of the ink and the adhesive liquid can be performed by appropriately programming the printer driver.

It is necessary to drive the adhesive solution before heating and pressing the thermoplastic resin layer on the recording surface.
Normally, the adhesive liquid is injected after the ink is injected, and the thermocompression bonding process is performed after the completion of the injection operation of both liquids. The injection of the adhesive liquid can be performed before the injection of the ink, and the point is that the thermoplastic resin layer to be thermocompression-bonded and the resin component of the adhesive liquid come into contact with each other.

Further, the pattern and amount of the adhesive liquid to be injected may be appropriately adjusted within a range in which the adhesiveness between the thermoplastic resin layer (protective layer) and the recording surface is excellent. Examples of the hitting pattern include a hitting pattern uniformly over the entire surface to be recorded regardless of the presence or absence of ink hitting, an ink hitting along the edge of the object to be printed, and an ink hitting portion only overlapping. To be In addition, the implantation amount is about 0.1 to 5 mg / cm ^{2 in} terms of wet weight (actual implantation amount), and is 0.
It is preferably about 01 to 2.5 mg / cm ² .

The ink used in the image forming step according to the present invention is not particularly limited as long as it can be used in ink jet recording. Ink jet recording ink generally contains water containing a coloring agent such as a dye or a pigment, and usually further contains various organic solvents and surfactants for moisturizing, permeation adjustment and the like. . Among ink jet recording inks, pigment inks are particularly superior to dye inks in light resistance and water resistance of recorded images, and together with the protective effect of images by the protective layer, long-term storage of images is possible. Is possible, which is preferable. In the case of forming a color image, inks of three primary colors of subtractive color mixture of yellow, magenta, and cyan, or four or more inks in which inks of black and other colors are added are used as usual.

The recording medium used in the image forming step is not particularly limited as long as it can be used in ink jet recording, such as plain paper (non-coated paper) and ink jet recording paper (coated paper). According to the present invention, even if the recording medium has a low smoothness on the recording surface, the thermoplastic resin can be adhered to the recording surface with good adhesion. It may be appropriately selected according to the above.

When a high quality image is required, it is preferable to use an inkjet recording paper. The ink jet recording paper usually has a structure in which an ink receiving layer containing porous inorganic particles as a main component is provided on a base material such as paper or film. As the porous inorganic particles, porous amorphous silica, porous magnesium carbonate, porous alumina and the like are preferably used. The content of the porous inorganic particles is preferably 40 to 90% by weight based on the dry weight of the ink receiving layer.

The above-mentioned ink receiving layer contains a binder such as polyvinyl alcohol, vinyl acetate, or an acrylic copolymer latex as a binder for the porous inorganic particles. The content of the binder is preferably 5 to 60 parts by weight with respect to 100 parts by weight of the porous inorganic particles. In the ink receiving layer, if necessary, a dye fixing agent, a fluorescent whitening agent, an antifungal agent, an antiseptic agent, a surfactant, a thickener, a pH adjusting agent, a defoaming agent, a water retention agent, a hard film. One or more kinds of various additives such as an agent, a coloring dye, a coloring pigment, a pigment dispersant, a leveling agent, and an ultraviolet absorber can be contained.

The thickness of the ink receiving layer is preferably 10 to 50 μm from the viewpoint of prevention of powder falling.
In addition, the texture, texture, etc. (surface property) of the ink receiving layer are
It is not particularly limited, and may be a matte tone, a high-gloss tone having a mirror gloss finish by a casting method, or a semi-gloss tone.

In the laminating step according to the present invention, a thermal transfer sheet having a structure in which a thermoplastic resin layer is provided on a support is used. The thermal transfer sheet will be described below.

The support constituting the above-mentioned thermal transfer sheet has heat resistance and mechanical strength capable of stably maintaining its shape under a predetermined heating and pressurizing condition during lamination.
A material having a good releasability from the thermoplastic resin layer which is thermocompression-bonded to the recording surface is used. Examples of such a support include polyethylene terephthalate (PE
T), 1,4-polycyclohexylene dimethylene terephthalate, polyethylene naphthalate (PEN), polyphenylene sulfide (PPS), polyether sulfone (PES), polystyrene, polypropylene, aramid, polycarbonate, polyvinyl alcohol, cellophane, cellulose acetate, etc. Resin films such as cellulose derivatives, polyethylene, polyvinyl chloride, nylon, polyimide, ionomers; papers such as condenser paper and paraffin paper; non-woven fabrics; papers or composite films of non-woven fabrics and resin films, and especially PET films. preferable.

The thickness of the above-mentioned support may be set so as to obtain the above-mentioned function, and is not particularly limited, but is 8 to
About 100 μm is preferable. If it is less than 8 μm, the releasability of the thermoplastic resin layer may decrease, and if it exceeds 100 μm, the adhesion of the thermoplastic resin layer to the ink receiving layer may decrease.

On the surface of the support on which the thermoplastic resin layer is laminated, good releasability, prevention of adhesion of dust due to static electricity, improvement of design of the surface of the protective layer (thermoplastic resin layer), etc. Therefore, various surface treatments such as release treatment using silicone or the like, antistatic treatment, corona discharge treatment, embossing treatment and the like can be performed.

The thermoplastic resin layer constituting the thermal transfer sheet is a layer which becomes a protective layer by being thermally transferred onto the recording surface on which an image is formed, and supports a resin emulsion containing a thermoplastic resin as a dispersoid. It is formed by applying it on the body and drying it. As described above, the MFT of the resin emulsion is, in addition to the MFT of the adhesive solution or more, in itself in the range of 0 to 80 ° C., particularly 0 to 40 ° C., which facilitates thermal transfer, It is preferable in terms of excellent chemical / physical barrier properties required for the protective layer. In order to adjust the MFT of the resin emulsion in such a range, the thermoplastic resin has a Tg of -20 to 8
It is preferable to select one in the range of 0 ° C, particularly 0 to 40 ° C.

The thermoplastic resin is preferably selected so that the surface hardness of the protective layer is a pencil hardness of 2H or more in the pencil hardness test according to JIS K5600.

As the thermoplastic resin forming the thermoplastic resin layer, for example, polyvinyl alcohol (PV
A), silanol-modified PVA, polyvinylpyrrolidone (PVP), polyvinyl acetal, polyacrylamide, casein, gelatin, urethane, acrylic resin, styrene-acrylic resin, polyethylene, vinyl acetate, ethylene-vinyl acetate copolymer (EVA), chloride Vinyl
Vinyl acetate copolymer, vinyl chloride resin, water-based alkyd resin, epoxy resin, acetate resin, polyester resin, wax, acrylic styrene, styrene-butadiene rubber (SBR), acrylic ester, and the like,
These 1 type (s) or 2 or more types can be used. Among these thermoplastic resins, it is particularly preferable to use acrylic resin or vinyl acetate in terms of adhesive strength, yellowing resistance and cost.

Further, the thermoplastic resin layer may have a single-layer structure consisting of only one type of resin emulsion,
A multi-layer structure may be obtained by applying a plurality of types of resin emulsions having different compositions one on top of another, and drying. The thickness of the thermoplastic resin layer (the total thickness in the case of a multilayer structure) is preferably 1 to 50 μm, and particularly preferably 3 to 30 μm.
If it is less than 1 μm, a sufficient image protection effect may not be obtained, and if it exceeds 30 μm, the transparency may be deteriorated and the cost effectiveness is not high.

The thermal transfer sheet comprises a resin emulsion containing the thermoplastic resin as a dispersoid on the support.
It can be produced by coating using a known coating device such as an air knife coater, a roll coater, a blade coater and drying. The resin emulsion contains, if necessary, an ultraviolet absorber, a light stabilizer, a quencher, an antioxidant, a water-proofing agent, a fungicide, a preservative, a surfactant, a thickener, a fluidity improver, and a pH. Various additives such as a regulator, an antifoaming agent, a foam suppressor, a leveling agent and an antistatic agent can be added.

Next, a preferred embodiment of the method for producing a recorded matter with a protective layer of the present invention will be described with reference to the drawings.

FIG. 1 is a side view schematically showing a main part of an apparatus used for carrying out the manufacturing method of this embodiment. This apparatus has a structure in which a thermal transfer mechanism (film laminator) is incorporated in the rear of a recording head of an inkjet printer for roll paper, and the inkjet recording unit 1 used in the image forming process and the laminating process are used. And the laminating unit 2 used.

The ink jet recording section 1 includes a recording head 1
1 is provided, and each color ink is ejected from the jet nozzle of the recording head 11 on the recording surface of the recording medium M in a rolled-up state, based on the input image information, The above-mentioned adhesive solution is driven into the place.

FIG. 2 shows the nozzle surface 11a of the recording head 11.
FIG. In FIG. 2, 12 and 17 are nozzle rows for ejecting the adhesive liquid, and 13, 14, 15, and 16 are nozzle rows for ejecting yellow, magenta, cyan, and black inks, respectively. The recording head 11 has an arrow mark P.
_When scanning in _one direction, first, the nozzle rows 13, 1
The ink of the required color is sequentially ejected from Nos. 4, 15 and 16, and then the nozzle row 1 is applied to a predetermined position on the recording surface.
It operates so as to drive the adhesive liquid from No. 7 (in this case, the nozzle row 12 is not used). On the other hand, when scanning in the arrow P ₂ direction, first, the nozzle rows 16, 15, 14, 13
We will continue to drive in ink of more necessary colors, and then
The nozzle array 12 is operated to drive the adhesive liquid to a predetermined position on the recording surface (in this case, the nozzle array 17 is not used). Such a bidirectional (P ₁
And P ₂ ) scanning and the conveyance of the recording medium M at the end of each scanning are repeated, whereby a desired image is formed on the recording surface and the adhesive liquid adheres to a predetermined portion of the recording surface. To be done.

The laminating unit 2 supplies the thermal transfer sheet S having a structure in which the thermoplastic resin layer C _S is provided on the support B _S , and the thermoplastic resin layer C _{S on} which an image is formed. a heat pressing means 22 for heating and pressing onto the recording surface, the support from the heated crimped thermoplastic resin layer C _S B _S
And a peeling means 23 for peeling. The thermocompression bonding means 22 is a pair of rollers (heat rollers) having a built-in heater, and can heat and pressurize the sheet-like material passing between the pair of rollers. It should be noted that the heating and pressing means may be any one capable of performing heating and pressurizing treatment on the sheet-like material, and may be a thermal head, an iron, a commercially available laminator, or the like.

In the laminating unit 2 having such a structure, the laminating step proceeds as follows. First, on the recording surface of the recording medium M on which an image has been formed by the ink jet recording unit 1 and the adhesive liquid has been injected, the thermal transfer sheet S is transferred to the thermoplastic resin layer C by the supply means 21.
_It is supplied so that _S and the surface to be recorded face each other to form a laminated body.

Then, the above-mentioned laminate is heated and pressed by the means 22.
By passing between the pair of rollers, the pressure is applied under heating. The heating temperature at this time may be a temperature not lower than the Tg of the resin (thermoplastic resin) in the adhesive liquid. This heating and pressing treatment, the thermoplastic resin layer C _S is good adhesion bonding to said recording surface, a protective layer C is formed. After that, when the temperature of the laminate decreases, the support _BS is peeled off by the peeling means 23 to obtain a recorded matter with a protective layer.

In addition, a cutter 3 is provided near the sheet discharge port of the above apparatus.
Is provided so that the continuous sheet-shaped recorded matter with the protective layer can be cut into a desired length and then discharged.

The method for producing a recorded matter with a protective layer of the present invention is as follows:
Before the thermocompression-bonding of the thermoplastic resin layer, an adhesive liquid having a minimum film-forming temperature lower than or equal to the minimum film-forming temperature of the resin emulsion constituting the thermoplastic resin layer is applied to the recording surface by an inkjet method. However, the present invention is not limited to the above embodiment. For example, the number and type of inks used in the present invention, the specific configuration of the inkjet printer, the order and method of driving the ink and the aqueous post-treatment liquid, the driving pattern, etc. are not limited to the above-described embodiment, and the gist of the present invention is not limited. Various changes can be made without departing from the above.

[0050]

EXAMPLES The present invention will be described in more detail below with reference to examples of the present invention and test examples showing the effects of the present invention. However, the present invention is not limited to these examples. is not.

(Preparation of Adhesive Liquids) Adhesive liquids 1 to 4 having the compositions shown in Table 1 below were prepared.

[0052]

[Table 1]

(Production of Thermal Transfer Sheet) Support (“PET
Lumirror S10 ”PANAC, thickness 38 μm, acrylic resin emulsion (“ Acryset EX-35 ”Nippon Shokubai, MFT 42 ° C., resin Tg 20 ° C.) was applied so that the film thickness after drying was 15 μm. A thermoplastic resin layer was formed by drying to manufacture a thermal transfer sheet.

Example 1 Inkjet printer
(“MC2000” manufactured by Seiko Epson)
Yellow, magenta, cyan, light magenta, light
Recording with 6 color ink pigments, Anne and Black
Recording of media ("MC photo paper" made by Seiko Epson)
3.5 mg / cm implantation amount for the entire surface^TwoWith each color
After performing solid printing by printing,
Using a linter ("PM800C" manufactured by Seiko Epson)
Then, the adhesive liquid 1 is applied over the entire surface to be recorded.
3 mg / cm ^Two(0.6 mg / cm in terms of solid content^Two) To drive evenly
I see. Then, on the recording surface, the thermal transfer sheet
So that the thermoplastic resin layer and the recording surface face each other.
On top of each other and pass between a pair of heat rolls
The heating and pressurizing process was carried out. Heating temperature is 3
The temperature was 0 ° C. and the linear pressure was 5 kN / cm. Thus obtained
Apply the thermocompression-bonded product of the thermal transfer sheet and the recording medium to
The sample of Example 1 was used.

(Example 2) A thermocompression bonded article was produced in the same manner as in Example 1 except that the above adhesive liquid 2 was used in place of the above adhesive liquid 1, and the thermocompression bonded product was prepared as in Example 2. It was used as a sample.

(Example 3) A thermocompression bonded product was produced in the same manner as in Example 1 except that the adhesive liquid 3 was used in place of the adhesive liquid 1 in Example 1, and the thermocompression-bonded product was prepared as in Example 3. It was used as a sample.

Comparative Example 1 A thermocompression bonded product was produced in the same manner as in Example 1 except that the above-mentioned adhesive liquid 1 was not used, and this was used as a sample of Comparative Example 1.

Comparative Example 2 A thermocompression bonded product was produced in the same manner as in Example 1 except that the adhesive liquid 4 was used instead of the adhesive liquid 1 in Example 1, and the thermocompression-bonded product was prepared as in Comparative Example 2. It was used as a sample.

(Evaluation test of support releasability) Examples 1 to 3
Also, from each of the samples of Comparative Examples 1 and 2 (the thermocompression-bonded product of the thermal transfer sheet and the printed recording medium), only the support was peeled off to obtain a recorded product with a protective layer. Peeling angle (angle formed between the support and the thermocompression-bonded thermoplastic resin layer) 180
And the peeling speed was 100 cm / min. Visually observing the recording surface of the recording material with the protective layer thus obtained,
It evaluated by the following evaluation criteria. The results are shown in Table 2 below. <Evaluation Criteria> A: The thermoplastic resin layer does not float up from the recording surface during peeling of the support, and neither blurring nor peeling of the image occurs. B: Some floating of the thermoplastic resin layer from the recording surface and transfer of the coloring agent to the thermoplastic resin layer side are observed,
There is no problem in practical use. C: Lifting of the thermoplastic resin layer from the recording surface and transfer of the colorant to the thermoplastic resin layer side occur, and image bleeding and peeling are severe. Not practical.

(Adhesive Liquid Discharge Stability Evaluation Test) The above adhesive liquids 1 to 4 were applied to an ink jet printer (“PM800
C "made by Seiko Epson). After operating this printer as usual and confirming that each adhesive liquid is ejected stably, the print head is removed from the home position, and the environment is maintained at a temperature of 50 ° C and a relative humidity of 40%. Left for 4 weeks. After that, move this printer to a normal indoor environment, wait until the printer body temperature drops to room temperature, then turn on the printer power, solid-stick each adhesive liquid to the recording medium, and visually check the ejection state. I observed. When the ejection became unstable, a predetermined cleaning operation was performed, and the number of cleaning operations required until the adhesive liquid was stably ejected was counted. These were comprehensively evaluated by the following evaluation criteria. The results are shown in Table 2 below. <Evaluation Criteria> A: Stable ejection was performed without causing clogging. B: Clogging occurs, and cleaning operation is required within two times to recover.

[0061]

[Table 2]

[0062]

According to the present invention, before the thermoplastic resin layer is heated and pressure-bonded, an adhesive solution having an MFT of MFT or less of the resin emulsion constituting the thermoplastic resin layer is applied to the recording surface. Adhesion with excellent adhesion is performed between the thermoplastic resin layer and the recording surface. Therefore, in the subsequent peeling process of the support, the thermoplastic resin layer does not float or peel off from the recording surface, the support can be peeled smoothly and cleanly, and the image is not disturbed. It is possible to provide a recorded matter with a high-quality protective layer.

Further, since the above adhesive liquid has excellent ejection stability and is ejected by the ink jet method similarly to the ink ejection, it is possible to manufacture a recorded matter with a protective layer by a simple process. In addition, the recorded matter with a protective layer obtained by the practice of the present invention, due to the action of the protective layer, has glossiness and smoothness as well as image fastness such as light resistance, water resistance, gas resistance and abrasion resistance. It is excellent and can be stored for a long time.

[Brief description of drawings]

FIG. 1 is a side view schematically showing a main part of an apparatus used for carrying out a manufacturing method of the present embodiment.

FIG. 2 is a front view of a nozzle surface of a recording head in the apparatus shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Ink jet recording part 11 Recording head 11a Nozzle surface 12-17 Nozzle row 2 Laminating part 21 Supplying means 22 Heating / pressurizing means 23 Peeling means 3 Cutter M Recording medium S Thermal transfer sheet B _S Support C _S Thermoplastic resin layer C Protective layer

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Claims (10)

[Claims] 1. A step of forming an image by injecting ink on a recording surface of a recording medium by an ink jet method, and a thermoplastic resin layer provided on a support on the recording surface on which the image is formed. And a step of peeling the support from the thermoplastic resin layer after heat-pressing the thermoplastic resin layer, and the method for producing a recorded matter with a protective layer, comprising the thermoplastic resin layer, comprising: Prior to thermocompression bonding, an adhesive liquid whose minimum film forming temperature is lower than or equal to the minimum film forming temperature of the resin emulsion forming the thermoplastic resin layer is applied to the recording surface by an inkjet method. Method for manufacturing layered recorded matter. 2. The difference between the minimum film-forming temperature of the resin emulsion forming the thermoplastic resin layer and the minimum film-forming temperature of the adhesive liquid is 0 to 100 ° C. The method for producing a recorded matter with a protective layer of. 3. The minimum film forming temperature of the adhesive liquid is 0 to 80 ° C.
The method for producing a recorded matter with a protective layer according to claim 1 or 2, wherein 4. The recording with a protective layer according to claim 1, wherein the thermocompression bonding of the thermoplastic resin layer is performed at a temperature not lower than the glass transition temperature of the resin in the adhesive liquid. Method of manufacturing things. 5. The resin in the adhesive liquid is an acrylic resin,
It is 1 type (s) or 2 or more types selected from the group which consists of vinyl acetate resin, styrene-butadiene resin, isoprene-isobutylene resin, and acryl-styrene copolymer resin, It is characterized by the above-mentioned. The method for producing a recorded matter with a protective layer of. 6. The average particle diameter of the resin in the adhesive liquid is 10
To 500 nm, The manufacturing method of the recording material with a protective layer in any one of Claims 1-5 characterized by the above-mentioned. 7. The adhesive liquid contains 0.1 to 50% by weight of resin.
7. The method for producing a recorded matter with a protective layer according to claim 1, wherein the recorded matter is contained. 8. The adhesive according to claim 1, wherein the adhesive liquid contains one kind or two or more kinds selected from the group consisting of a wetting agent, a penetrating agent and a surfactant. Manufacturing method of recorded matter with protective layer. 9. The method for producing a recorded matter with a protective layer according to claim 1, wherein the adhesive liquid is uniformly applied to the entire surface of the recording surface. 10. The method for producing a recorded matter with a protective layer according to claim 1, wherein an image is formed using an aqueous pigment ink.