JP2006255929A - Inkjet printing sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet printing sheet, with which a thin plastic film printed with a sheet-fed inkjet printer can be obtained, though conventionally no favorable printing with the sheet-fed printer on the thin plastic film is possible due to the jam developing in the printer. <P>SOLUTION: This inkjet printing sheet is so constituted as to laminate a base material layer, a bonding layer made of an extruded polyethylene layer or a self-adhesive layer, a film layer and a water color ink accepting layer in the order named under the condition that the film layer is separated from the base material layer through the peeling-off between the bonding layer and the film layer. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ink jet printing sheet for obtaining a thin plastic film printed by an ink jet printing method using a sheet feeding printer.

Conventionally, as an inkjet printing sheet for forming an image by printing on a plastic film by an inkjet recording method using water-based ink, for example, a thermoplastic resin, a crystalline plasticizer, and a tackifier on one surface of a substrate An ink jet recording sheet provided with an ink-receiving layer containing an agent (for example, see Patent Document 1), a surface printing layer made of an acrylic resin film having a thickness of 30-100 μm, and a solvent-resistant plastic film having a thickness of 30-100 μm An inkjet printing sheet (for example, refer to Patent Document 2) and the like on which a base material layer is bonded is known.
JP-A-8-207426 Utility model registration No. 3087401

  However, in the former inkjet recording sheet, a 75 μm polyester film (Lumirror Q-81: manufactured by Toray Industries, Inc.) is used as a substrate, and it is not possible to obtain an extremely thin plastic film printed by inkjet. . The latter inkjet printing sheet is a sheet having a structure in which a surface printing layer made of an acrylic resin film having a thickness of 30-100 μm and a base material layer made of a solvent-resistant plastic film having a thickness of 30-100 μm are bonded together. And since it is not the sheet | seat for inkjet printing which consists of a thin plastic film, it has the fault that the thin plastic film by which inkjet printing was carried out cannot be obtained.

  An object of the present invention is to provide an ink jet printing sheet which can obtain an extremely thin plastic film which is ink jet printed by printing using a sheet feeding ink jet printer.

  An ink jet printing sheet comprising a base material layer, an adhesive layer, a film layer, and a water-based ink receiving layer laminated, wherein the film layer is separated from the base material layer by peeling between the adhesive layer and the film layer. It is.

  The adhesive layer is composed of an extruded polyethylene layer, and an anchor agent layer is formed on the base material layer surface.

  The adhesive layer is composed of a pressure-sensitive adhesive layer.

  It is the structure by which the notch is formed in the corner | angular part of a base material sheet.

  When printing on a thin film by the inkjet method, there is a problem that jamming occurs in the printer and printing cannot be performed well. However, after printing by the inkjet method using the inkjet printing sheet of the present invention, the film By peeling the layer from the substrate, it is possible to print on a very thin film having a thickness of about 6 to 25 μm by an ink jet method using a normal sheet feeding ink jet printer. Multi-color printing can be easily performed by using an ink-jet printing method, so that predetermined multi-color printing can be performed on a thin plastic film, and a base material layer can be removed from a sheet on which a pattern is formed. Since it becomes a very thin plastic film after peeling, it is attached to the surface of a paper box, plastic molded product, packaging bag, or other product on which no pattern is formed. It is particularly suitable for applications such as confirming design properties in

  In the invention according to claims 2 and 3, the base material layer and the film layer do not peel at the time of printing and handling, and the film layer can be easily peeled off from the base material layer after ink jet printing and separated. .

  It becomes easy to create a trigger for peeling when the film layer is peeled off from the base material layer and separated.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of the ink jet printing sheet of the first embodiment of the present invention, FIG. 2 is a cross sectional view of the ink jet printing sheet of the second embodiment of the present invention, and FIG. 3 is printed on the ink jet printing sheet of the first embodiment. FIG. 4 is a cross-sectional view showing a state where the film layer is peeled off from the inkjet printing sheet later, FIG. 4 is a cross-sectional view showing the ink-jet printed film, and FIG. 5 is a film layer from the ink-jet printing sheet after printing on the ink-jet printing sheet of the second embodiment. FIG. 1 is a cross-sectional view showing a state in which the film is peeled off; 1, 1 ′ is an inkjet printing sheet, 10 is an inkjet printed film, 11 is a base material layer, 12 is an extruded polyethylene layer, 12 ′ is an adhesive layer, and 13 is a film 14 represents an aqueous ink receiving layer, 15 represents an anchor agent layer, and 16 represents an ink jet printing layer.

  The ink jet printing sheet 1 according to the first embodiment of the present invention is as shown in FIG. 1, wherein a base material layer 11, an anchor agent layer 15, an extruded polyethylene layer 12, a film layer 13, and a water-based ink receiving layer 14 are sequentially arranged. It is a laminated structure, and after forming an image on the surface of the water-based ink receiving layer 14 by ink jet printing, the film layer 13 can be separated from the base material layer 11 by peeling between the extruded polyethylene layer 12 and the film layer 13. Is. In the ink jet printing sheet 1 of the first embodiment, the anchor agent layer 15 is formed between the base sheet 11 and the extruded polyethylene layer 12, but the base sheet 11 has good adhesion to the extruded polyethylene layer 12. In some cases, the anchor agent layer 15 may not be formed.

  The inkjet printing sheet 1 ′ of the second embodiment of the present invention is as shown in FIG. 2, and a base material layer 11, an adhesive layer 12 ′, a film layer 13 and a water-based ink receiving layer 14 are laminated in order. After forming an image on the surface of the water-based ink receiving layer 14 by inkjet printing, the film layer 13 can be separated from the base material layer 11 by peeling between the pressure-sensitive adhesive layer 12 ′ and the film layer 13. is there. When the base material layer 11 and the film layer 13 are laminated with the adhesive layer 12 ′, the adhesive strength between the base material layer 11 and the adhesive layer 12 ′ is increased by applying the adhesive composition to the surface of the base material layer 11. Since the adhesive strength between the pressure-sensitive adhesive layer 12 ′ and the film layer 13 can be made larger, it can be peeled between the base material layer 11 and the pressure-sensitive adhesive layer 12 ′. The film layer 13 used in the first and second embodiments is a thin film that cannot be printed by an inkjet printer with a single film.

  After forming an image on the surface of the aqueous ink-receiving layer 14 of the inkjet printing sheet 1 of the first embodiment by inkjet printing, the film layer 13 is peeled off between the extruded polyethylene layer 12 and the film layer 13 of the inkjet printing sheet 1. The state of separation from the layer 11 is as shown in FIG. By peeling between the extruded polyethylene layer 12 and the film layer 13 of the inkjet printed sheet 1 subjected to inkjet printing, as shown in FIG. 4, inkjet printing comprising the film layer 13, the water-based ink receiving layer 14, and the inkjet printing layer 16 is performed. Film 10 is obtained.

  After forming an image on the surface of the aqueous ink receiving layer 14 of the ink jet printing sheet 1 ′ of the second embodiment by ink jet printing, the film layer 13 is peeled off between the adhesive layer 12 ′ and the film layer 13 of the ink jet printing sheet 1 ′. Is separated from the base material layer 11 as shown in FIG. By peeling between the pressure-sensitive adhesive layer 12 ′ and the film layer 13 of the inkjet printed sheet 1 ′ that has been inkjet-printed, as shown in FIG. 4, the film layer 13 and the water-based ink receiving layer 14 are the same as in the first embodiment. Thus, an inkjet-printed film 10 comprising the inkjet printing layer 16 is obtained. By using the ink jet printing sheets 1 and 1 'of the first and second embodiments, the film itself is jammed in the printer and cannot be printed well, and ink jet printing is performed on a thin film having a thickness of about 6 to 25 μm. be able to. By performing predetermined multicolor printing on a thin film with a thickness of about 6 to 25 μm by inkjet printing, the multicolored film can be used for paper boxes, plastic molded products, packaging bags, etc. It can be suitably used for applications such as sticking to the surface of the product and confirming the design properties in a state where a pattern is applied to the surface of the product.

In the first and second embodiments, as the base material layer 11 of the ink jet printing sheet, a base material layer having strength and rigidity that does not cause jam when printing with a sheet feeding ink jet printer is used. It is necessary to use a plastic sheet having a thickness of about 75 μm or more and a paper having a basis weight of about 60 g / m ² or more. As the film layer 13, a thin plastic film having a thickness of about 6 to 25 μm that cannot be printed satisfactorily when a single film is printed by an ink jet printer is generated in the printer. Although the kind of plastic film is not particularly limited, it is preferable to use a biaxially stretched film, and a biaxially stretched polyethylene terephthalate film is most suitable in consideration of the use of an ink jet printed film.

  Examples of the resin constituting the water-based ink receiving layer used in the ink jet printing sheet are modified with a polymer of a compound having a polymerizable double bond, as described in JP-A-5-229246. Polyester resin aqueous dispersion comprising a composition obtained by copolymerizing one or more selected from unsaturated carboxylic acid amides and / or derivatives thereof in the polymer, JP-A-7-299959 As described in the official gazette, the average particle size is 0.05 to 0.50 μm, the particle size distribution of 0.03 to 1.0 μm is 90% or more, the acid value is 5 to 100 mg KOH / g, and the glass transition Non-film-forming polyacrylic acid ester emulsion having a temperature (Tg) of 40 to 130 ° C. and a particle size having an average particle size of 3.5 to 10.0 μm and a particle size of 1.5 to 20.0 μm Fabric 90%, oil absorption of 100~250ml / g, and amorphous silica having a pore size of 130～180A, can be used such as those having the composition containing as a filler. The aqueous ink receptive layer is formed by coating the composition as described above on the surface of the film layer constituting the ink jet printing sheet to a thickness of 6 to 10 μm. As the water-based ink receiving layer, NS-620X manufactured by Takamatsu Yushi Co., Ltd., FW-828 manufactured by Nippon Kayaku Paint Co., Ltd., or the like can be used.

  The polyethylene constituting the extruded polyethylene layer is a low density polyethylene suitable for extrusion lamination processing, and a low density polyethylene for ordinary extrusion lamination is used. When the sheet base material layer and the film layer are laminated by extrusion lamination with the extruded polyethylene layer, the extrusion polyethylene is formed by forming an anchor agent layer on the sheet base material layer surface and laminating without forming the anchor agent layer on the film layer surface. Although the layer adheres well to the surface of the sheet base material layer, the adhesive strength between the extruded polyethylene layer and the film layer is weak, and the layer can be easily peeled between the extruded polyethylene layer and the film layer.

  As the pressure-sensitive adhesive composition constituting the pressure-sensitive adhesive layer, it is preferable to use a pressure-sensitive adhesive material having a sufficiently low adhesive strength at room temperature. Examples of the low-adhesion substance include acrylic ester copolymers, styrene / butadiene copolymers, acrylonitrile / butadiene copolymers, polyacrylic resins, polyurethane resins, polyester resins, and polyvinyl acetate resins. The resin solution and aqueous dispersion are applied to the substrate sheet surface and dried to form an adhesive layer.

Sectional drawing of the inkjet printing sheet of 1st Embodiment of this invention. Sectional drawing of the inkjet printing sheet of 2nd Embodiment of this invention. Sectional drawing which shows the state which peels a film layer from an inkjet printing sheet, after printing on the inkjet printing sheet of 1st Embodiment. Sectional drawing which shows the film by which inkjet printing was carried out. Sectional drawing which shows the state which peels a film layer from an inkjet printing sheet, after printing on the inkjet printing sheet of 2nd Embodiment.

Explanation of symbols

1,1 'inkjet printing sheet
10 Inkjet printed film
11 Base material layer
12 Extruded polyethylene layer
12 'adhesive layer
13 Film layer
14 Water-based ink receiving layer
15 Anchor layer
16 Inkjet printing layer

Claims (4)

It consists of a structure in which a base material layer, an adhesive layer, a film layer, and a water-based ink receiving layer are laminated, and consists of a structure in which the film layer can be separated from the base material layer by peeling between the adhesive layer and the film layer. Inkjet printing sheet. The inkjet printing sheet according to claim 1, wherein the adhesive layer is composed of an extruded polyethylene layer, and an anchor agent layer is formed on the surface of the base material layer. The inkjet printing sheet according to claim 1, wherein the adhesive layer is made of an adhesive layer. The ink jet printing sheet according to any one of claims 1 to 3, wherein a notch is formed in a corner portion of the base sheet.

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