JP4006329B2 - Laminating members and laminate prints - Google Patents

Description

【００４５】
（ＰＥＴフィルムの剥離性の評価）
各実施例および比較例において得られたラミネート印画物前駆体から、印画物の被記録媒体の内側1ｃｍを４辺カッターで切断し、耐熱性基材を手作業で剥離して、巾１４ｃｍ、長さ１４ｃｍのラミネート印画物を得た。この試験片のＰＥＴフィルムを手で剥離することにより、剥離試験を行った。ＰＥＴフィルムの剥離性は次の基準で評価した。結果を表２に示す。
○ ：剥離し、ラミネート印画物を得ることができた
× ：剥離時に被記録媒体が裂け、ラミネート印画物が破損された
××：剥離不可能であった
【００４６】
【表２】

【００４７】
【発明の効果】
本発明によれば、耐熱性基材の剥離が容易であり、かつ、透明フィルム層が剥がれてラミネート印画物を汚染することがないラミネート用部材を提供することができる。また、このラミネート用部材を用いて形成したラミネート層を有するラミネート印画物を提供することもできる。
【図面の簡単な説明】
【図１】本発明のラミネート用部材の実施形態の一例を説明するための断面図である。
【図２】本発明に使用することのできる、インクジェット記録法に用いられる被記録媒体の一例を説明するための断面図である。
【図３】本発明のラミネート印画物の実施形態の一例を説明するための断面図である。
【符号の説明】
１ａ ＰＥＴフィルム（耐熱性基材）
１ｂ 第１の層（表面保護層）
１ｃ 第２の層（接着層）
２ａ 基材
２ｂ インク受容層[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a laminating member for covering (laminating) an image surface of a printed matter obtained by forming an image on a recording medium with a transparent film layer.
[0002]
[Prior art]
Printed images such as inkjet, offset, gravure, and electrophotography have improved image fastness such as light resistance, water resistance, and friction resistance by laminating the surface on which the image is formed (image surface). Further, it is widely known that the glossiness and smoothness of the image surface and the maximum density of the image are increased and the image quality is improved.
[0003]
In particular, the printed matter formed by the inkjet recording method employs a method of printing a dye dissolved in water on a recording medium with high moisture absorption due to the restriction on the printing method that ink ejects from a fine discharge port. With the widespread use of the inkjet recording apparatus, many ink jet recording apparatuses are formed using water-based inks containing water-soluble dyes. In general, a printed matter formed by such an ink jet recording system may have poor weather resistance, and it has been desired to improve the fastness of the printed matter. Laminating is effective for enhancing the robustness of the printed matter formed by the ink jet recording method.
[0004]
The method for producing a laminate print is to press the transparent resin layer supported by the heat-resistant substrate of the laminating member onto the image surface of the print, and then peel off the heat-resistant substrate to place the transparent resin layer on the image surface. A transfer-type laminating method (for example, Patent Document 1 and Patent Document 2) that forms a laminate layer by leaving the laminate on the image surface without peeling off the heat-resistant substrate. There is a non-transfer type laminating method for forming a laminate print.
[0005]
[Patent Document 1]
JP-A-6-91767 [Patent Document 2]
JP-A-2000-233474 [0006]
In the non-transfer type laminating method, the properties of the heat-resistant substrate itself are reflected in the laminate printed matter. A polyethylene terephthalate sheet or the like is used as the heat-resistant substrate. Generally, since the heat-resistant substrate itself has haze, the image density is increased when the laminate layer is formed while leaving the heat-resistant substrate on the image surface. Is a low print. Therefore, in order to improve the image quality of the laminate printed material, a transfer type laminating method in which the heat-resistant substrate is peeled off and not left on the image surface is suitable.
[0007]
In the transfer-type laminating method, since the heat-resistant substrate is peeled after the laminating member is pressure-bonded to the print, it is preferable that the peel strength between the heat-resistant substrate and the transparent resin layer is small. However, if the peeling force is too small, the transparent resin layer may be peeled off before or during use of the laminating member, and may adhere to the heating part of the laminator or adhere to the laminate print and cause contamination. .
[0008]
[Problems to be solved by the invention]
For this reason, a technique for achieving both peelability and stain resistance has been required for laminating members and laminated printed materials.
An object of the present invention is to provide a laminating member that is easy to peel off a heat-resistant substrate and that does not contaminate a laminate print by peeling off a transparent film layer when the heat-resistant substrate is peeled off. There is.
[0009]
[Means for Solving the Problems]
The present invention that has solved the above problems can be identified by the following matters.
(1) Laminating member having a polyethylene terephthalate film used as a heat-resistant substrate, and a transparent film layer for forming a laminate layer on the image surface of the printed material, which is provided on the heat-resistant substrate so as to be peelable. In
The transparent film layer is a first layer that serves as a surface protective layer of a laminate layer formed on the image surface of the printed material, and a second layer that is provided on the first layer and serves as an adhesive layer to the printed material. And a layer of
And the said 1st layer contains 0.1 mass part or more and 3 mass parts or less of polyester-type resin with respect to 100 mass parts of acrylic resin, The member for lamination characterized by the above-mentioned.
[0010]
In the present invention, the transparent film layer of the laminating member for forming a laminate layer on the image surface of the printed material is a first layer that serves as a surface protective layer of the image surface and an adhesive layer between the printed material. By forming the surface protection layer from at least two of the two layers and containing the specific resin, it is possible to provide a laminating member having both peelability and contamination resistance.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A cross-sectional view of an example of a laminating member according to the present invention is shown in FIG.
The laminating member includes a first layer 1b (sometimes referred to as a surface protective layer) that serves as a surface protective layer when a laminate layer is formed on the heat-resistant substrate 1a on the image surface of the printed material. A second layer 1c (which may be referred to as an adhesive layer) serving as an adhesive layer to the image surface is laminated in this order.
[0012]
As the heat-resistant substrate, a polyethylene terephthalate (PET) film that can stably maintain the form under heating and pressing conditions when the adhesive layer is thermocompression bonded to the image surface of the printed material is used. The thickness may be a thickness suitable for the laminating process, and may be selected from the range of, for example, 3 to 50 μm, preferably 3 to 20 μm, and more preferably 5 to 10 μm.
In order to use the laminate member in a roll shape, it is effective to perform a mold release treatment on the surface opposite to the surface on which the transparent film layer of the heat resistant substrate is provided. Examples of the release material include silicone and wax.
[0013]
For the surface protective layer, a combination of an acrylic resin with low adhesion to the heat-resistant substrate and a polyester resin with high adhesion is used, and the mixing ratio thereof is 100 parts by mass of the acrylic resin with respect to the polyester resin. Is 0.1 to 3 parts by mass. The polyester resin is preferably 0.5 to 2 parts by mass and more preferably 1 to 1.5 parts by mass with respect to 100 parts by mass of the acrylic resin.
[0014]
When a polyester resin in an amount of 3 parts by mass or less is used with respect to 100 parts by mass of an acrylic resin, the heat-resistant substrate can be easily peeled off. And the laminated printed matter is not contaminated.
[0015]
As an acrylic resin, what is necessary is just a thing without tack at room temperature, for example, a glass transition point can be selected from the range of 30-150 degreeC, Preferably it is 50-120 degreeC, More preferably, it is 70-110 degreeC, Examples of the acrylic monomer constituting this include (meth) acrylic acid alkyl ester compounds such as methyl acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, and ethylhexyl (meth) acrylate. Furthermore, it is possible to copolymerize a monomer having an ultraviolet absorber function with an acrylic monomer. Examples thereof include 2- (2′-hydroxy-5 ′-(meth) acryloyloxyethylphenyl) -2H-benzotriazole and 2-hydroxy-4- {2- (meth) acryloyloxy} ethoxybenzophenone.
The acrylic resin preferably has a weight average molecular weight (sometimes referred to as Mw) of 60,000 to 300,000, more preferably 100,000 to 250,000, and 150,000 to 200. More preferably, it is 1,000.
When the Mw of the acrylic resin is 60,000 or more, it is preferable that no cracks are generated in the laminate layer formed on the screen of the printed matter. Further, when the Mw of the acrylic resin is 300,000 or less, the polymerization of the acrylic resin becomes easy.
[0016]
The polyester resin is preferably one that is compatible with the acrylic resin.
Using a polyester resin that is compatible with the acrylic resin can prevent the polyester resin from bleeding on the surface of the laminate layer or the interface between the surface protective layer and other layers, and the peel strength This is preferable because it is easy to control.
Polyester resins are those obtained by polycondensation of a polybasic acid and a polyol. Examples of the polybasic acid include phthalic anhydride, isophthalic acid, tetrahydrophthalic anhydride, and adipic acid. Examples of the polyol include ethylene glycol. 1,6-hexylene glycol, trimethylolpropane, pentaerythritol and the like.
[0017]
Further, the weight average molecular weight (Mw) of the polyester resin is set to 10,000 or less, more preferably 8,000 or less, and further preferably 5,000 or less from the viewpoint of compatibility with the acrylic resin. The weight average molecular weight is 1,000 or more, more preferably 1,500 or more, and still more preferably 2,000 or more, which is a polymerizable weight average molecular weight.
The layer thickness of the surface protective layer can be selected from 1 to 20 μm, for example.
[0018]
Adhesion layer can be formed when a laminate layer is formed on the image surface of the printed material, and a transparent film can be formed and the heat resistant substrate is heated and pressurized at a temperature that maintains a stable form. The material constituting the layer is required to be softened and have fluidity, and to sufficiently flow into the recesses present on the image surface of the printed matter.
[0019]
Examples of the material constituting the adhesive layer include polyethylene-based, vinyl acetate-based, vinyl chloride vinyl acetate-based, ethylene vinyl acetate-based, and acrylic thermoplastic resins, and at least one of these may be used. it can.
The layer thickness of the adhesive layer can be selected from 5 to 30 μm, for example.
[0020]
As a method for producing the laminating member of the present invention, an appropriate method can be selected and adopted from known production methods according to the material to be used. For example, the material constituting the first layer of the laminating member of the present invention is mixed with an appropriate solvent as necessary to prepare a coating solution for forming the first layer, and this is heat-resistant. It can be manufactured by coating on a PET film used as a conductive substrate and drying to form a first layer, and similarly, forming a second layer on the first layer. it can. When adjusting the coating liquid for forming the first layer or the second layer, it is usually used in the technical field to which the present invention belongs, as long as the effects of the present invention are not impaired. Additives such as ultraviolet absorbers, light stabilizers, antioxidants, plasticizers and the like can be used.
[0021]
As a coating method of the first layer and the second layer, for example, a roll coating method, a rod bar coating method, a slot die coating method, a micro gravure coating method, or the like can be used.
[0022]
Laminate prints having a laminate layer formed using the laminate member of the present invention can be produced using various prints. A printed material formed by an ink jet recording method can also be suitably used.
[0023]
Laminate prints, for example, by superimposing the adhesive layer surface of the laminate member of the present invention on the image surface of a print produced by recording an image on the ink receiving layer of a recording medium by an image forming apparatus of an ink jet recording system, Laminating layers are laminated on the image surface by applying pressure and thermocompression bonding using a heating roll, etc., cooling the laminated product and the printed product (and laminating member), and peeling off the heat-resistant substrate. Printed prints, that is, laminate prints can be produced.
[0024]
Appropriate conditions may be selected for the pressurizing and heating conditions in consideration of the production speed of the laminate printed material of the machine to be used, the material of the printed material and the laminating member, and the like. For example, in the case of producing a laminate print by pressurizing and heating with a heating roll method using the laminating member of the present invention to produce a laminate print, it is generally 5 to 50 N / cm, preferably 15 to 35 N / What is necessary is just to press-fit and heat-press with the linear pressure of cm, and generally 60-160 degreeC, Preferably it is the temperature of 80-130 degreeC.
[0025]
FIG. 2 shows a cross-sectional view of an example of a recording medium used in the ink jet recording method that can be used in the present invention.
The substrate 2a that supports the ink receiving layer can stably maintain its form under pressure and heating conditions when a laminate layer is formed on the image surface of a printed matter using the laminating member of the present invention. For example, polyethylene terephthalate (PET) sheet, polyethylene naphthalate (PEN) sheet, polyphenylene sulfide (PPS) sheet, polyethersulfone (PES) sheet and other plastic sheets, fine paper, coated paper, laminated paper, etc. A paper material etc. can be mentioned.
[0026]
The ink receiving layer 2b is generally composed of at least porous inorganic particles and, if necessary, a binder.
As the porous inorganic particles, silica, alumina, magnesium carbonate, calcium carbonate, silica alumina mixed crystal, silica magnesium mixed crystal and the like can be used. Of these, silica is preferable from the viewpoint of economy. Silica having an average aggregate particle diameter of 3 to 7 μm is preferable for improving the ink absorption rate. Preferred examples of silica that can be used in the present invention include Fine Seal X-60 (manufactured by Tokuyama Corporation; trade name) and Mizukasil P-50 (manufactured by Mizusawa Chemical Co., Ltd .; trade name). be able to.
[0027]
As the binder, for example, polyvinyl alcohol, polyurethane, acrylic resin, or the like can be used. These binders are preferably used in the form of, for example, an emulsion that is soluble in water or dispersed in water. The content ratio of the binder is preferably in the range of 20 to 50% by mass (based on the mass of solid content) with respect to the mass of all the materials constituting the ink receiving layer. Further, the ratio of the binder to the porous inorganic particles is preferably selected from the range of 30 to 60% by mass.
[0028]
Furthermore, the ink receiving layer can contain various additives such as a dispersant, a fluorescent dye, a pH adjuster, a lubricant, and a surfactant as necessary. The thickness of the ink receiving layer is not particularly limited, but is preferably selected from a range of 15 to 50 μm, for example.
[0029]
As a method for coating the ink receiving layer, known methods such as a roll coating method, a rod bar coating method, and a slot die coating method can be used.
[0030]
FIG. 3 is a cross-sectional view of a laminate print produced by using the laminate member of the present invention from a print produced by recording an image on a recording medium used in the ink jet recording method having the configuration shown in FIG. Indicated.
[0031]
【Example】
Example 1
(Production of laminating members)
Acrylic resin, Dianal BR-82 (Mitsubishi Rayon Co., Ltd., weight average molecular weight 150,000; trade name) 100 parts by mass, polyester resin, Byron 220 (Toyobo Co., Ltd., weight average molecular weight 3,000; (Product name) 0.1 parts by mass and 400 parts by mass of toluene were mixed to prepare a coating solution for forming a surface protective layer. This coating solution was applied to a PET film (film thickness: 38 μm) by a microgravure coating method so as to have a dry film thickness of 5 μm and dried to form a surface protective layer on the PET film.
On the surface protective layer, an acrylic emulsion, VINYBRAN 2706F (manufactured by Nissin Chemical Industry Co., Ltd .; trade name) is applied by a micro gravure coating method so as to have a dry film thickness of 15 μm, and dried to form an adhesive layer. Thus, a laminate member was obtained.
[0032]
(Example 2)
A laminating member was obtained in the same manner as in Example 1 except that the amount of Byron 220 used was 1.0 part by mass.
[0033]
(Example 3)
A laminating member was obtained in the same manner as in Example 1 except that the amount of Byron 220 used was 3.0 parts by mass.
[0034]
(Example 4)
A laminating member was obtained in the same manner as in Example 1 except that Byron GK250 (manufactured by Toyobo Co., Ltd., weight average molecular weight 10,000; trade name) was used as the polyester resin.
[0035]
(Example 5)
A laminating member was obtained in the same manner as in Example 4 except that the amount of Byron GK250 was changed to 3.0 parts by mass.
[0036]
(Comparative Example 1)
A laminating member was obtained in the same manner as in Example 1 except that no polyester resin was used.
[0037]
(Comparative Example 2)
A laminating member was obtained in the same manner as in Example 1 except that the amount of Byron 220 used was 0.05 parts by mass.
[0038]
(Comparative Example 3)
A laminating member was obtained in the same manner as in Example 1 except that the amount of Byron 220 used was 10.0 parts by mass.
[0039]
(Example of creating a recording medium)
(Reference Example 1)
Polyvinyl alcohol, PVA235 (manufactured by Kuraray Co., Ltd .; trade name) was dissolved by heating in ion-exchanged water to obtain a 10% by mass aqueous polyvinyl alcohol solution. 180 parts by mass of this polyvinyl alcohol aqueous solution, silica, 27 parts by mass of Fine Seal X-60 (manufactured by Tokuyama Corporation; trade name) and 93 parts by mass of ion-exchanged water are mixed and stirred to form an ink receiving layer. A working solution was obtained.
This coating solution was coated on a high-quality paper having a basis weight of 186 g / m ^{2 with} a slot die coater so that the layer thickness after drying was 50 μm and dried to obtain a recording medium.
[0040]
(Making laminate prints)
(Example 6)
A black solid image was printed with an ink jet printer (manufactured by Canon Inc .; trade name BJF8500) using the recording medium of Reference Example 1, 15 cm wide and 15 cm long to obtain a printed matter.
The laminating member of Example 1, an adhesive layer of the laminating member and the above-mentioned printed material are superimposed on the center part of a width of 20 cm and a length of 20 cm, and a steel roller having a diameter of 80 mm and a rubber roller having a diameter of 50 mm heated to 130 ° C. However, the heat-resistant base material of the laminating member is in contact with the steel roller and the surface on which the image of the printed material is not formed is in contact with the rubber roller. The roller pair is nipped with a load of 120 N (linear pressure: 30 N / cm). Thus, the laminating member and the image surface of the printed material were pressed and heated and pressure-bonded at a feed rate of 8 mm / s. This was cooled to obtain a laminate (may be referred to as a laminate print precursor) in which the print was pressure-bonded to the laminating member.
[0041]
(Examples 7 to 10)
A laminate printed matter was obtained in the same manner as in Example 6 except that the laminating member of Examples 2 to 5 was used.
[0042]
(Comparative Examples 4-6)
Laminated prints were obtained in the same manner as in Example 6 except that the laminating members of Comparative Examples 1 to 3 were used.
[0043]
(Evaluation test)
[Evaluation of delamination of laminate members (contamination resistance)]
Each of the laminating members (length 100 mm × width 100 mm) obtained in each example and comparative example was folded in half so that the heat-resistant substrate (PET film) side was inside, and one side of the short side was fixed, and the other side Hold the short side by hand, twist it 180 degrees, and then put it back. Repeat this twist 5 times. It was visually observed whether or not the transparent film layer was peeled off by this operation, and the layer peeling of the laminating member was evaluated as follows. The results are shown in Table 1.
○: Delamination was not observed ×: Delamination was observed
[Table 1]

[0045]
(Evaluation of peelability of PET film)
From the laminate printed material precursors obtained in each of the examples and comparative examples, the inside 1 cm of the recording medium of the printed material was cut with a four-side cutter, and the heat-resistant substrate was peeled off manually to obtain a width of 14 cm and a long length. A laminate print having a thickness of 14 cm was obtained. A peel test was performed by manually peeling the PET film of the test piece. The peelability of the PET film was evaluated according to the following criteria. The results are shown in Table 2.
○: Peeled and a laminate print could be obtained. ×: Recording medium was torn during peeling and the laminate print was damaged. XX: Peeling was impossible.
[Table 2]

[0047]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the member for lamination which can peel a heat resistant base material easily, and a transparent film layer peels and does not contaminate a laminate printed matter can be provided. In addition, a laminate print having a laminate layer formed using the laminate member can also be provided.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view for explaining an example of an embodiment of a laminating member of the present invention.
FIG. 2 is a cross-sectional view for explaining an example of a recording medium used in an ink jet recording method that can be used in the present invention.
FIG. 3 is a cross-sectional view for explaining an example of an embodiment of a laminate printed material of the present invention.
[Explanation of symbols]
1a PET film (heat-resistant substrate)
1b First layer (surface protective layer)
1c Second layer (adhesive layer)
2a Substrate 2b Ink receiving layer

Claims (3)

In a laminating member having a polyethylene terephthalate film used as a heat-resistant substrate, and a transparent film layer for forming a laminate layer on the image surface of a printed material, provided to be peelable on the heat-resistant substrate,
The transparent film layer is a first layer that serves as a surface protective layer of a laminate layer formed on the image surface of the printed material, and a second layer that is provided on the first layer and serves as an adhesive layer to the printed material. And a layer of
And the said 1st layer contains 0.1 mass part or more and 3 mass parts or less of polyester-type resin with respect to 100 mass parts of acrylic resin, The member for lamination characterized by the above-mentioned. The acrylic resin is an acrylic resin having a weight average molecular weight of 60,000 or more and 300,000 or less , and the polyester resin is a polyester resin having a weight average molecular weight of 1,000 or more and 10,000 or less. The laminating member according to claim 1.   A laminate layer formed by using the laminating member according to claim 1 or 2 on an image surface of a printed matter having an image formed by applying ink to a recording medium by an ink jet recording method. Laminated print.

Images