JP3105005B2 - Receiving layer transfer sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving layer transfer sheet, and more particularly, to a receiving layer transfer sheet capable of providing a dye receiving layer only on a required portion of an arbitrary image receiving sheet and further causing no abnormal transfer during image formation. The purpose is to provide seats.

[0002]

2. Description of the Related Art Conventionally, various thermal transfer methods are known. Among them, a sublimable dye is used as a recording agent, and this is carried on a base sheet such as paper or plastic film to form a thermal transfer sheet. Methods for forming various full-color images on paper or plastic film provided with a layer have been proposed. In this case, a thermal head of a printer is used as a heating means, and a large number of color dots of three or four colors are transferred to a thermal transfer image receiving sheet by heating for a very short time, and a full-color image of an original is formed by the multicolored dots. Is to reproduce. The image formed in this way is
It is very clear because the coloring material used is a dye,
And, because of its excellent transparency, the resulting image is excellent in the reproducibility and gradation of intermediate colors, similar to images by conventional offset printing or gravure printing, and has high quality images comparable to full-color photographic images. It can be formed. However, an image receiving sheet on which an image can be formed by the above method is
It is limited to a plastic sheet having a dye-dyeing property or a paper provided with a dye-receiving layer in advance, and there is a problem that an image cannot be directly formed on ordinary plain paper. Of course, it is possible to form an image even on ordinary plain paper if the receiving layer is formed on the surface thereof, but this is generally costly. For example, postcards, memos, stationery, reports It is difficult to apply to general off-the-shelf recording paper such as paper. As a method for solving such problems, when an image is to be formed on a ready-made product such as plain paper, a receptor layer transfer sheet is known as a method for easily forming a dye receptor layer only on a necessary portion thereof. (See, for example, JP-A-62-264994). In the case of the receiving layer transfer sheet as described above,
An adhesive layer is formed on the surface of the receiving layer to improve the transferability of the receiving layer. After the receiving layer is transferred to the image receiving sheet, the receiving layer is used to improve the peelability between the thermal transfer sheet and the receiving layer during image formation. A release agent is added and mixed in the layer.

[0003]

In the case of the conventional receiving layer transfer sheet as described above, the releasability of the transferred receiving layer decreases with the passage of time, and the thermal transfer sheet and the receiving layer are separated during image formation. There is a problem that so-called abnormal transfer occurs in which the dye layer adheres and the dye layer is transferred as a layer. Accordingly, an object of the present invention is to provide a receptor layer transfer sheet which can provide a dye receiving layer only at a necessary portion of an arbitrary image receiving sheet and does not cause abnormal transfer during image formation.

[0004]

The above object is achieved by the present invention described below. That is, according to the present invention, a dye-receiving layer containing a release agent and an adhesive layer are formed on at least one surface of the base sheet in the order described, and between the adhesive layer and the dye-receiving layer , chloride is present. Vinyl / vinyl acetate copolymer resin, poly
Vinyl acetate resin, acrylic resin, polyamide resin
At least one selected from the group consisting of polystyrene resins
A transfer layer receiving sheet, characterized in that a release agent barrier layer is formed from said resin .

[0005]

When the receiving layer transfer sheet is stored for a long time, the releasing agent in the receiving layer is transferred to the adhesive layer, and the releasing agent concentration in the receiving layer is reduced to cause abnormal transfer. In the present invention, by forming a release agent barrier layer between the adhesive layer and the dye receiving layer of the receiving layer transfer sheet, there is provided a receiving layer transfer sheet in which the releasability does not decrease even after long-term storage. .

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in more detail with reference to preferred embodiments. The receiving layer transfer sheet of the present invention is characterized in that a dye receiving layer, a release agent barrier layer and an adhesive layer are sequentially provided on at least one surface of a substrate sheet.

The base sheet used in the present invention includes synthetic paper (polyolefin, polystyrene, etc.), woodfree paper, art paper, coated paper, cast coated paper, wallpaper, backing paper, synthetic resin or emulsion impregnated paper, Synthetic rubber latex impregnated paper, synthetic resin internal paper, paperboard, etc., various plastic films or sheets such as cellulose fiber paper, polyolefin, polyvinyl chloride, polyethylene terephthalate, polystyrene, polymethacrylate, polycarbonate, etc. can be used. A white opaque film formed by adding a white pigment or a filler to these synthetic resins or a foamed foam sheet can also be used, and there is no particular limitation. Also, a laminate formed by any combination of the above base sheets can be used. Examples of typical laminates include synthetic paper of cellulose fiber paper and synthetic paper or cellulose fiber paper and plastic film or sheet. The thickness of these substrate sheets may be arbitrary, for example, 10 to 30
A thickness of about 0 μm is common. A release layer can be formed on the base sheet as described above in order to adjust the adhesion to the receiving layer formed on the surface of the base sheet.

[0008] The dye receiving layer formed on the surface of the base sheet is for receiving the sublimable dye transferred from the thermal transfer sheet after transferring to the image receiving sheet and maintaining the formed image. Examples of the resin for forming the dye receiving layer include polyolefin resins such as polypropylene, halogenated polymers such as polyvinyl chloride and polyvinylidene chloride, vinyl polymers such as polyvinyl acetate and polyacrylester, polyethylene terephthalate, and poly (ethylene terephthalate). Polyester resins such as butylene terephthalate, polystyrene resins, polyamide resins, copolymer resins of olefins such as ethylene and propylene with other vinyl monomers, ionomers, cellulose resins such as cellulose diacetate, and polycarbonate. Particularly preferred are vinyl resins and polyester resins.

The dye receiving layer in the present invention contains a release agent so as to have a good release property from the thermal transfer sheet during image formation. Preferred release agents include silicone oil, phosphate ester-based surfactants, fluorine-based surfactants, and the like, with silicone oil being preferred. As the silicone oil, epoxy-modified, alkyl-modified,
Modified silicone oils such as amino-modified, carboxyl-modified, alcohol-modified, fluorine-modified, alkyl aralkyl polyether-modified, epoxy / polyether-modified, and polyether-modified are preferred. One or more release agents are used. The amount of the release agent is preferably 0.5 to 30 parts by weight based on 100 parts by weight of the resin for forming the dye receiving layer. If the addition amount is not satisfied, problems such as fusion of the thermal transfer sheet and the dye receiving layer or reduction in printing sensitivity may occur. The receiving layer, on a base sheet, a resin and an additive necessary for the release agent as described above, and a dispersion obtained by dissolving in an appropriate organic solvent or dispersing in an organic solvent or water, For example, gravure printing,
It is formed by applying and drying by forming means such as a screen printing method and a reverse roll coating method using a gravure plate.

In the formation of the dye receiving layer, titanium oxide, zinc oxide, kaolin clay, calcium carbonate, fine silica powder, etc. are used for the purpose of improving the whiteness of the dye receiving layer to further enhance the sharpness of the transferred image. Pigments and fillers can be added. Further, a fluorescent whitening agent, an antioxidant or an ultraviolet absorber can be added for the purpose of improving the sharpness and light resistance of the formed dye image. The dye receiving layer formed as described above has an arbitrary thickness, but generally has a thickness of 1 to 50 μm. Further, such a dye receiving layer is preferably a continuous coating, but may be formed as a discontinuous coating using a resin emulsion or a resin dispersion.

A release agent barrier layer is provided on the surface of the receptor layer so that the release agent in the receptor layer does not migrate toward the adhesive layer. These release agent barrier layers are, for example, coated with a solution of a resin in which the release agent is hardly compatible, such as a vinyl chloride-vinyl acetate copolymer resin, a polyvinyl acetate resin, an acrylic resin, a polyamide resin, and a polystyrene resin. By drying, it is preferably formed to a thickness of about 0.1 to 5 μm. In forming the release agent barrier layer, various pigments as described above, a filler, a fluorescent whitening agent, an antioxidant or for the purpose of improving the whiteness of the dye receiving layer and further increasing the sharpness of the transferred image. An ultraviolet absorber can be added, and the release agent barrier layer can be made porous with a foaming agent or the like to further improve cushioning properties.

An adhesive layer is provided on the surface of the barrier layer for the purpose of improving the transferability of the receptor layer formed thereon. These adhesive layers, for example, polyurethane resin,
Applying and drying a solution of a resin with good adhesion such as chlorinated polypropylene, acrylic resin, polyamide resin, epoxy resin, vinyl chloride resin, ethylene-vinyl acetate copolymer resin, vinyl chloride-vinyl acetate copolymer resin, etc. Is preferably formed to a thickness of about 0.5 to 5 μm. In the formation of the adhesive layer, various pigments, fillers, fluorescent brighteners, antioxidants or ultraviolet absorbers as described above are used for the purpose of improving the whiteness of the dye receiving layer to further enhance the sharpness of the transferred image. Agents can be added.

Further, a lubricating layer can be provided on the back surface of the base sheet. Examples of the material of the lubricating layer include a methacrylate resin such as methyl methacrylate or a corresponding acrylate resin, and a vinyl resin such as a vinyl chloride-vinyl acetate copolymer. Further, it is also possible to provide a detection mark on the receiving layer transfer sheet. The detection mark is extremely convenient when positioning the receiving layer transfer sheet and the image receiving sheet. For example, a detection mark that can be detected by a photoelectric tube detection device can be provided on the back surface of the base sheet by printing or the like.

The object to which the receptor layer is transferred using the receptor layer transfer sheet of the present invention as described above is not particularly limited.
For example, any sheet such as plain paper, high-quality paper, tracing paper, and plastic film may be used.In terms of shape, any type of card, postcard, passport, stationery, report paper, notebook, catalog, etc. may be used. It can also be applied to plain paper and rough paper with a coarse surface. The transfer method of the receiving layer is a general printer equipped with a thermal head for thermal transfer, a hot stamper for a transfer foil, a heat roll, or any heating and pressurizing means capable of heating to a temperature at which the adhesive layer is activated. Good.

The thermal transfer sheet used for thermal transfer to the image receiving sheet to which the receptor layer has been transferred is provided with a dye layer containing a sublimable dye on paper or polyester film.
Any conventionally known thermal transfer sheet can be used as it is in the present invention.

As the means for applying thermal energy during thermal transfer, any conventionally known means can be used.
By a recording device such as a thermal printer (for example, Video Printer VY-100 manufactured by Hitachi, Ltd.),
5-100m by controlling the recording time
By applying thermal energy of about J / mm ² , the intended purpose can be sufficiently achieved.

[0017]

Next, the present invention will be described more specifically with reference to examples and comparative examples. In the following description, parts and% are based on weight unless otherwise specified.

Example 1 A 6.0 μm thick polyethylene terephthalate film (Lumirror, manufactured by Toray Industries, Inc.) was used as a base sheet.
For receiving layer of the following composition on the surface of this one, the release agent husband a barrier layer and an adhesive layer coating solution with a bar coater at the dry people ^{4g / m 2, 1g / m} 2 and 5 g / m ² Coating was performed at an appropriate ratio, and each was dried at an appropriate temperature and for an appropriate time to obtain a receptor layer transfer sheet of the invention. Coating liquid for receiving layer Vinyl chloride / vinyl acetate copolymer (# 1000A, manufactured by Denki Kagaku Kogyo Co., Ltd.) 100 parts Amino-modified silicone (KF-393, manufactured by Shin-Etsu Chemical Co., Ltd.) 5 parts Epoxy-modified silicone ( KS-343, Shin-Etsu Chemical Co., Ltd.) 5 parts Methyl ethyl ketone / toluene (weight ratio: 1/1) 500 parts Coating liquid for release agent barrier layer Nylon resin (FS-175, Toagosei Co., Ltd.) 100 Part Denatured ethanol 30 parts Coating liquid for adhesive layer Urethane resin / isocyanate (Takelac A-310 / A-3, manufactured by Takeda Pharmaceutical Co., Ltd.) 100 parts Ethyl acetate 50 parts

Example 2 An image receiving sheet was obtained in the same manner as in Example 1, except that the following coating liquid was used as the coating liquid for the release agent barrier layer in Example 1. Coating liquid for release agent barrier layer Vinyl chloride / vinyl acetate copolymer (# 1000A, manufactured by Denki Kagaku Kogyo KK) 100 parts MEK / toluene 700 parts

Example 3 The following coating liquids were used as the respective coating liquids in Example 1,
An image receiving sheet was obtained in the same manner as in Example 1. Coating liquid for receiving layer Vinyl chloride / vinyl acetate copolymer (# 1000A, manufactured by Denki Kagaku Kogyo Co., Ltd.) 100 parts Amino-modified silicone (KF-393, manufactured by Shin-Etsu Chemical Co., Ltd.) 5 parts Epoxy-modified silicone ( KS-343, manufactured by Shin-Etsu Chemical Co., Ltd.) 5 parts Fluorescent brightener (Ubitex OB, manufactured by Ciba Geigy) 1 part Methyl ethyl ketone / toluene (weight ratio 1/1) 500 parts Coating liquid for release agent barrier layer Nylon resin (FS-175, manufactured by Toa Gosei Co., Ltd.) 100 parts Denatured ethanol 30 parts Coating liquid for adhesive layer Nylon resin (1163V, manufactured by Toa Gosei Co., Ltd.) 100 parts Titanium oxide 20 parts Toluene 700 parts

Comparative Example 1 An image receiving sheet was obtained in the same manner as in Example 1, except that the via layer was not formed.

Comparative Example 2 An image receiving sheet was obtained in the same manner as in Example 1 except that the via layer was not formed.

Each of the transfer sheets of the above-mentioned Examples and Comparative Examples was left for 72 hours at 40 ° C. and 90% RH, and then the transfer layer was transferred to plain paper by a hot roll. (Video Printer-VY-10
0, manufactured by Hitachi, Ltd.), a full-color gradation image was formed. In the case of the examples, no problem of peeling between the image receiving sheet and the thermal transfer sheet occurred, but in the case of the comparative example, Also, abnormal transfer occurred, and no good image was formed.

[0024]

According to the present invention as described above, a release agent barrier layer is formed between an adhesive layer and a dye receiving layer of a transfer layer transfer sheet, so that the releasability does not decrease even after long-term storage. A receiving layer transfer sheet is provided.

Continuation of the front page (56) References JP-A-62-264994 (JP, A) JP-A-2-1384 (JP, A) JP-A-2-273293 (JP, A) JP-A-61-172795 (JP) JP-A-63-71389 (JP, A) JP-A-63-81093 (JP, A) JP-A-2-43092 (JP, A) JP-A-62-1585 (JP, A) (58) Field surveyed (Int.Cl. ⁷ , DB name) B41M 5/38-5/40

Claims (2)

(57) [Claims] 1. A dye receiving layer containing a release agent and an adhesive layer are formed on at least one surface of a substrate sheet in the stated order, and vinyl chloride is interposed between the adhesive layer and the dye receiving layer.
・ Vinyl acetate copolymer resin, polyvinyl acetate resin, acrylic
Resin, polyamide resin and polystyrene resin
A receiving layer transfer sheet, wherein a release agent barrier layer is formed from at least one resin selected from the group . 2. The receiving layer transfer sheet according to claim 1, wherein the barrier layer is formed of a resin incompatible with the release agent.