JPH0316791A - Transfer sheet to be heated - Google Patents

Abstract

PURPOSE:To improve dye depositing properties at the time of recording an image and light resistance after the image is recorded by forming an image receiving layer formed on a sheet base material for receiving dye to be transferred from a heat transfer sheet by heating of image receiving layer forming resin made of polymer containing specified monomer. CONSTITUTION:An image receiving layer is formed of image receiving layer forming resin which can receive dye to be transferred from a heat transfer sheet in case of heat transfer recording, dye is deposited thereon to form a transfer image. The image receiving layer is formed by using at least the layer forming resin made of polymer containing monomer represented by a formula I. The polymer may be copolymer or homopolymer. In the formula, n=3-20, m=1-500, desirably m=5-100. R1 is -H or -CLH2L+1, where l=1-10. Thus, the depositing properties of the dye are satisfactory, and simultaneously the image receiving layer having excellent light resistance after the transfer image is formed is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermal transfer sheet that can form a thermal transfer image when used in combination with a thermal transfer sheet. [Prior Art] A thermal transfer sheet is stacked with its image-receiving layer facing the coloring material layer of a transfer sheet having a coloring material layer containing a heat-transferable dye, and electricity is applied from the back side of the thermal transfer sheet in accordance with image information. By heating the thermal transfer sheet with a heating means such as a thermal head controlled by a signal, the dye in the coloring material layer can be transferred to the image receiving layer to form a transfer pattern. [Problems to be Solved by the Invention] However, conventional thermal transfer sheets have good dyeability against dyes transferred from the thermal transfer sheet during thermal transfer recording, and also have excellent light fastness after image formation. There was no such thing that had both of these characteristics. The present invention was made in view of the above problems, and
image? The purpose of this invention is to provide a thermal transfer sheet that has excellent dye dyeing properties during recording and light resistance after image recording. [Means for Solving the Problems] That is, the present invention provides: (1) A thermal transfer sheet comprising a sheet base material and an image-receiving layer formed on the base material and receiving a dye transferred from the thermal transfer sheet by heating. The image-receiving layer is made of at least a monomer CH. =CR, Co-+OC. H. ．． CO Office OH However, n-3~20, m=1~500 R, Ha-H or 1C, H■. 1. A thermal transfer sheet, characterized in that it is formed of an image-receiving layer-forming resin made of a polymer containing 1 to 10. (2) The thermal transfer sheet according to claim 1, further comprising an intermediate layer between the sheet base material and the image-receiving layer. (3) The thermal transfer sheet according to claim 1 or 2, wherein a release agent layer is provided on the surface of the image-receiving layer. The gist is: Examples of the sheet substrate used in the present invention include plastic film, paper, cellulose fiber, and the like. Films made of resins such as polyester, polyvinyl chloride, polypropylene, polyethylene, polycarbonate, polyamide, etc. can be used as plastic films, and white films made by adding fillers to these films or finely foamed films can be used. Foamed film can also be used. Heiji is produced by mixing polyolefin resin or other synthetic resin as a resin part with inorganic fillers, etc., and extruding it, or a film made of polystyrene resin, polyester resin, polyolefin resin, etc. Products manufactured by coating the surface of the body with a substance are used. As the cellulose fiber paper, high quality paper, coated paper, cast coated paper, synthetic rubber latex, or paper impregnated with Hewei resin emulsion can be used.

In addition, in applications that require transparency as a sheet base material (such as for overhead projectors) or applications that require heat transfer to items such as cards and cloth, an adhesive or the like may be applied to the opposite side of the transparent plastic film from the image-receiving layer. A white film, foamed film, gokai, or cellulose fabric can also be laminated as the coated support or shielding property imparting material. Furthermore, sheet base materials made by laminating plastic films, composite sheets, or cellulose fiber papers together using an adhesive can be used. The receiving layer is made of an image-receiving layer-forming resin that can receive the dye transferred from the thermal transfer sheet during thermal transfer recording and is made of IITIi. The dye is then dyed to form a transferred image. The present invention provides at least the heptanomer CH. =CR. CO-+OC1H! The image-receiving layer is constructed using an image-receiving layer-forming resin made of a polymer containing lIC〇91OH. The polymer may be a copolymer or a homopolymer. In the formula, n-3 to 20, m11 to 500, preferably m=5 to 100. RI is -H or one CLHit**, ffi=
1 to 10. Note that 01m and l are both integers. The above monomer is obtained by ring-opening polymerization of a polylactone polymer to the R portion of the acrylic resin COR shown below. The component ratio of the above monomer in the copolymer is 1 to 80
%, preferably 30 to 50%. Therefore, in the present invention, by forming the image receiving layer from a resin for forming a receiving layer made of a polymer containing at least the above-mentioned monomers, the dye stainability is good, and at the same time,
An image-receiving layer with excellent light resistance after transfer image formation is obtained. In the present invention, other image-receiving layer-forming resins may be mixed with the image-receiving layer-forming resin made of the above-mentioned polymer as needed. Other image-receiving layer forming resins include, for example, polyester resins, polystyrene resins, vinyl acetate resins, AS resins (acrylic nitrile styrene copolymer resins), polyacrylic resins, epoxy resins, phenolic resins, and AAS resins. Examples include resins (acrytose styrene-acrylonitrile copolymer resin), polyacetal resins, amine resins, ethylene-vinyl acetate copolymer resins, and polyptadiene resins. In forming the image-receiving layer, an ink composition for forming the image-receiving layer prepared by adjusting the resin for forming the image-receiving layer with a solvent or the like is applied onto the sheet base layer by a conventionally well-known coating means, and is formed by drying. The thickness of the image receiving layer is 1 to 50 μm. In the thermal transfer sheet of the present invention, an intermediate layer consisting of a cushion layer, a porous layer, etc. is provided between the sheet base material and the image-receiving layer, and by providing this intermediate layer, images corresponding to the image information can be reproduced with less noise and with good reproducibility. It can be transcribed and recorded. Examples of materials that make up the intermediate layer include urethane resin, acrylic resin, ethylene resin, putadiene rubber, and epoxy resin. The thickness of the intermediate layer is preferably about 2 to 20 μm. Further, the thermal transfer sheet of the present invention may contain a release agent in the image-receiving layer in order to improve releasability from the thermal transfer sheet. Examples of the molding agent include solid waxes such as polyethylene wax, adowax, and Teflon powder; fluorine-based and phosphoric acid ester-based surfactants; and silicone oil, with silicone oil being preferred.
Although oily silicone oils can be used as the silicone oil, hardened silicone oils are preferred. Examples of the curable silicone oil include reaction curable, photocurable, and catalytic curable silicone oils, with reaction curable silicone oils being particularly preferred. As a reaction curing silicone oil,
Preferably, an amino-modified silicone oil and an epoxy-modified silicone oil are reacted and cured. Examples of the amino-modified silicone oil include KF-393 (manufactured by Shin-Etsu Chemical Co., Ltd.), and examples of the epoxy-modified silicone oil include -22-343 (manufactured by Shin-Etsu Chemical Co., Ltd.), etc. Catalyst-curing or photo-curing silicone oils include KS-705F-PS (catalyst-curing silicone oil, manufactured by Shin-Etsu Chemical Co., Ltd.), KS-720
(Photo-curable silicone oil, manufactured by Shin-Etsu Chemical Co., Ltd.). The amount of these curable silicone oils added is 0.5 to 100 parts by weight of the resin constituting the image receiving layer.
Approximately 30 parts by weight is preferable. Further, a release agent layer can also be provided by dissolving or dispersing the above-mentioned mold release agent in a suitable solvent and coating it on the surface of the image-receiving layer, followed by drying. As the mold release agent constituting the mold release agent layer, a reaction cured product of the above-mentioned amino-modified silicone oil and epoxy-modified silicone oil is particularly preferred. The thickness of the release agent layer is 0.01 to 5, um, especially 0.0
5 to 2 μm is preferable. In addition, the thermal transfer sheet of the present invention can be provided with a slipping layer on the back surface of the sheet base material. Thermal transfer sheets may be stacked and transferred one by one to perform the transfer. In this case, providing a slippery layer allows the sheets to slide smoothly against each other, making it possible to accurately feed one sheet at a time. Examples of the material for the slipping layer include methacrylate resins such as methyl methacrylate or corresponding acrylate resins, and vinyl resins such as vinyl chloride-vinyl acetate copolymer. Furthermore, the thermal transfer sheet may contain an antistatic agent. Containing an antistatic agent has the effect of preventing dust from adhering to the thermal transfer sheet. The antistatic agent may be contained in the sheet base material or the image-receiving layer, or it can be provided as an antistatic agent layer on the back surface of the sheet base material, but it is preferably provided as an antistatic layer on the back surface of the sheet base material. ．． Furthermore, it is also possible to provide detection marks on the thermal transfer sheet. Detection marks are extremely convenient when positioning the thermal transfer sheet and the thermal transfer sheet. For example, detection marks that can be detected by a phototube detection device can be provided by printing on the back side of the sheet base material. [Example] Hereinafter, the present invention will be explained in more detail with reference to Examples. Note that "parts" below indicate parts by weight. Examples 1 to 3, Comparative Example 1 Each ink for forming an image-receiving layer having the following composition was prepared using a copolymer consisting of polymer components A, B, and C shown in Table 1 as a resin for forming an image-receiving layer. , 150 μm thick Hewei paper (
A thermal transfer sheet was prepared by applying wire bar coating to the surface of Yubo FPG150 (manufactured by Oji Yuka Co., Ltd.) so that the thickness after drying was 5 μm. A・CHt- C -CMO cs H +*C Oi
O H1 C} Ico B...Methyl methacrylate (MMA) C...Phenylmaleimide chloride Ink-imitating layered resin 20 parts A-ξ modified silicone oil 2 parts (manufactured by Shin-Etsu Chemical Co., Ltd.)
X-22-3050C) Epoxy-modified silicone oil 2 parts (manufactured by Shin-Etsu Chemical Co., Ltd.: x-f2-
3oooa) Solvent (MEK/toluene = 1/1) 8
0 parts (Precautions for thermal transfer sheet) A 6 μm thick polyethylene terephthalate film (manufactured by Toyobo: S) with a corona treatment on one side was used as a support.
-PET), on the corona-treated side of the film, apply the paint composition for forming a coloring material layer according to the following composition by wire bar coating so that the dry thickness is 1 lam, and apply silicone oil on the back side. (Manufactured by Shin-Etsu Silicone: X-
41.4003A) with a dropper, spread it over the entire surface, and applied a back treatment coat to form a thermal transfer sheet. l + Disperse dye...4 parts (Nippon Kayaku &! = Kayaset Blue 714) Ethyl hydroxyethyl cellulose resin...5 parts (manufactured by Hercules) Methyl ethyl tokene/toluene...90 parts = 1
/1 The thermal transfer sheet and the thermal transfer sheet obtained as described above are stacked so that the coloring material layer and the image receiving layer are in contact with each other, and using a thermal head from the support side of the thermal transfer sheet, Output IW/dot, pulse II
Q. 3 to 0. Printing was performed under the conditions of 4 5 printing seconds and a dot density of 3 dots/1 to form a transferred image on the image receiving layer of the thermal transfer sheet. The sensitivity of each heat transfer sheet after the above image formation was measured using a densitometer (manufactured by Macbeth).
RD-918), and each sensitivity value was expressed as a relative sensitivity based on the sensitivity value of the comparative example, and the results are shown in Table 1. In addition, the light fastness after the transfer image was formed was measured in accordance with the second exposure method of JIS LO841, and the initial fastness was grade 4, with the light fastness being good in the order of 5, 4, 3, 2, and 1. The results are also shown in Table 1. Examples 4 to 5 Among the polymer components in the above examples, the monomers represented by the following formula as component A and the value of m in the formula as shown in Table 2 were used. A thermal transfer sheet was prepared in the same manner as above. A... C old = C −
co+ O C s H +. CO? -OHC}I. A transfer image was formed on each of the obtained thermal transfer sheets under the same conditions as in the above example using a thermal transfer sheet. The sensitivity and light resistance of each heat transfer sheet were measured using the same method, and the results are shown in Table 2. [Effects of the Invention] As explained above, the thermal transfer sheet of the present invention has an image-receiving layer formed of an image-receiving layer-forming resin made of a polymer containing a specific monomer, and therefore has excellent dye dyeing properties. It is equipped with an image-receiving layer that has both light resistance and light resistance, and as a result,
It is possible to form images with good sensitivity and to ensure good image stability (storage) after image formation. Further, according to the present invention, by providing an intermediate layer between the sheet base material and the image-receiving layer, images with less noise can be transferred and recorded with good reproducibility. Furthermore, by providing a release agent layer on the surface of the image-receiving layer, it is possible to improve the releasability of the image-receiving layer from the thermal transfer sheet, especially during thermal transfer recording.

Claims (3)

[Claims] (1) In a thermal transfer sheet consisting of a sheet base material and an image receiving layer formed on the base material and receiving a dye transferred from the thermal transfer sheet by heating, the image receiving layer is formed using at least a monomer represented by the following general formula. ▲There are mathematical formulas, chemical formulas, tables, etc.▼ However, n = 3 to 20, m = 1 to 500 R_1 is -H or -C_t H_2_t+1l = 1
1. A thermal transfer sheet formed of an image-receiving layer-forming resin comprising a polymer containing: (2) The thermal transfer sheet according to claim 1, further comprising an intermediate layer between the sheet base material and the image-receiving layer. (3) The thermal transfer sheet according to claim 1 or 2, further comprising a release agent layer provided on the surface of the image-receiving layer.