JPH04107185A - Sublimable heat transfer image receiving medium - Google Patents

Abstract

PURPOSE:To eliminate thermal fusion-adherence and to obtain a high recording density by providing a dyeing layer containing specific weight % of substance to be easily dyed with sublimable dye on a base material and amino modified silicone oil to dyeing resin on a surface layer. CONSTITUTION:Thermal sublimable dye is sublimated and diffused from a dye transfer layer 3 of a sublimable heat transfer recording medium by heat from a thermal head 1, and the sublimated dye is transferred to a dyeing layer B of an image receiving medium. Since the layer B contains 3-6wt.% of amine modified silicone oil to dyeing resin, thermal fusion-adherence at the time of recording is prevented. Here, a main dyeing material for constituting the layer includes, for example, resin exhibiting dyeing properties for the sublimable dye such as polyester resin desirably having 80 deg.C or lower of glass transition temperature. Amino modified silicon oil used as mold release assistant in the dyeing layer has a molecular structure of (A), (B) or (C). Here, R is CH3 or OCH3, R1 is alkylene, R2 is alkylene, and m, n, x, y are respectively positive integers.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an image receiving medium for sublimation thermal transfer, which is used in combination with a thermal transfer recording medium having a transfer layer containing a thermal sublimation dye.

[Prior Art] A sublimation type thermal transfer recording method using a thermal transfer recording medium having a transfer layer containing a thermally sublimable dye and an image receiving medium receiving the dye sublimated by thermal printing from the back side of the recording medium is an excellent method. It has been attracting attention in recent years as it is capable of recording halftones and provides full-color hard copies that are similar to color photographs.

Conventionally, the image receiving medium used in this recording method is one in which a dyed layer made of thermoplastic polyester resin, which exhibits strong dyeability against sublimation dyes, is formed on a base material (synthetic paper, etc.). It is used.

However, since this polyester resin has low heat resistance, it has the disadvantage that it fuses with the transfer recording medium (color sheet) during recording.

In order to solve this problem, an image receiving medium (for example, JP-A-58-21
No. 2994, No. 58-215398, etc.), or an image receiving medium in which a heat-resistant layer of curable resin is provided on a dyeing layer made of thermoplastic resin (Japanese Patent Laid-Open No. 127392/1982), etc. have been proposed. .

〔the purpose〕

However, although the use of such an image-receiving medium has the effect of improving heat resistance and preventing fusion, it poses a problem in that the recording density (dyeability) decreases.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide an image-receiving medium that is free from thermal adhesion and has a high recording density.

[Structure] According to the present invention, in an image receiving medium having a dyed layer made of a substance easily dyed by a sublimation dye on a base material, the dyed layer is made of 3 to 6% by weight of amino-modified silicone oil. An image receiving medium for sublimation thermal transfer is provided, which is characterized by containing the following.

That is, the image receiving medium for sublimation thermal transfer of the present invention contains 3 to 6% by weight of amine based on the dyeable resin in one dye layer made of a substance that is easily dyed by the sublimation dye provided on the base material. The image-receiving medium for sublimation thermal transfer of the present invention contains modified silicone oil, and since the silicone oil not only has mold release properties but also has dye dyeing properties, the image receiving medium for sublimation thermal transfer of the present invention has the above structure. There is no thermal fusion without causing a decrease in concentration.

Next, the present invention will be explained with reference to the drawings.The specific structure and operation of the present invention are as follows.

In FIG. 1, the image-receiving medium of the present invention is composed of a base material A and a dyed layer B. In FIG. That is, dyeing layer B is formed on the surface of base material A.
The dyeing layer B contains a substance that is easily dyed by sublimation dye (main dyeing material) and 3 to 6% by weight of the main dyeing material.
The composition consists of amino-modified silicone oil (mold release aid). Further, l indicates a thermal head, and the sublimation thermal transfer recording medium is composed of a base film 2 and a dye transfer layer 3.

Due to the heating from the thermal head 1, the heat sublimable dye is sublimated and diffused from the dye transfer layer 3 of the sublimation heat transfer recording medium,
The sublimated dye is transferred to the dyed layer B of the image receiving medium. The sublimation dye transferred to the image-receiving medium diffuses into the dye-staining resin forming the dyed layer B and dyes the medium.

Since the image receiving medium of the present invention contains 3 to 6% by weight of amino-modified silicone oil based on the dyeing resin in the dyeing layer, thermal fusion during recording is prevented. Conventionally, mold release agents such as silicone oil that are commonly used in dyed layers do not have dye staining properties, so in the case of image receiving media that have dyed layers containing such mold release agents, image density However, if the amount of silicone oil is varied, high image density and prevention of thermal adhesion can be achieved only at a certain specific amount. It is generally said that the content of silicone oil, which can achieve both high image density and prevention of thermal fusion, is preferably 0.5% to 30% based on the dyeing resin. However, in reality, the content of amino-modified silicone oil is preferably 3% to 6% based on the dyeing resin, and if it is less than 3%, thermal adhesion cannot be prevented when high energy is applied; Above this, the image density decreases. By using amino-modified silicone oil as a release aid and controlling its content to 3% to 6% based on the dyeing resin, the image receiving medium of the present invention can obtain high image density. can.

As mentioned above, the dyeing layer of the present invention is composed of a resin that is easily dyed by a sublimation dye and an amino-modified silicone oil (release aid) in an amount of 3 to 6% by weight based on the dyeable resin. Moreover, the release aid only needs to be present at least in the surface layer of the dyed layer.

In the image-receiving medium of the present invention, the main dyeing material constituting the dyeing layer is not particularly limited as long as it is a resin that exhibits dyeability to sublimation dyes, such as polyester resin, chlorinated resin, etc. Examples include vinyl resins, vinyl chloride/vinyl acetate copolymer resins, acrylic resins, and nylon resins. However, those having a glass transition temperature of 80° C. or lower are preferred.

Further, the amino-modified silicone oil used as a release aid in the dyed layer has the molecular structure (A), CB) or (C) shown below.

(C) However, R: CH, or ocl(I R: alkylene R,: alkylene m, n, x, y; positive integer amino-modified silicone oils include commercially available products such as KF 393, KF857, KF858, KF8
59, KF860, KF861. KF862, KF8
64, KF865 (Shin-Etsu Chemical System), 5F8417,
B Yl 6-828, B Yl 6-849 (all manufactured by Dowconing Silicone), etc. The amount of amino-modified silicone oil based on the main dyeing material is 3 to 6% by weight.
It is.

In addition, in the present invention, the dyeing layer contains surfactants, various fine particles (for example, inorganic fine particles such as 5iO5, Tiol, CaC0, etc., organic fine particles such as fluorine-based resin, etc.), ultraviolet absorbers, and antioxidants. etc. can also be included as appropriate.

The thickness of the dyed layer is preferably about 1 to 20 .mu.m, particularly preferably 1 to 10 .mu.m.

Further, as the base FjA in the image receiving medium of the present invention, synthetic paper, art paper, high quality paper, coated paper, gravure paper, baryta paper, cellulose fiber paper, plastic film, etc. are preferably used alone or in a laminate thereof. used.

[Example J] Next, the present invention will be explained in more detail with reference to Examples. Note that all parts shown below are based on weight.

Example 1 Each mixture having the following composition was sufficiently mixed and dispersed to prepare a dyed layer coating material (Liquid A 3).

[Liquid A] Polyester resin 20 parts (Product name: Byron 200. Toyobo! 8I) Amine-modified silicone oil 1 part (Product name: KF393; Shin-Etsu Chemical) Methyl ethyl ketone 40 parts Toluene 40 parts Next [Liquid A] Using a wire bar, it was coated on synthetic paper (trade name: Yubo FPG-150; manufactured by Oji Yuka Synthetic Paper Co., Ltd.) with a thickness of about 150 μm, and dried at a drying temperature of 75°C for 1 minute to a thickness of about 4 μm.
An image receiving medium of the present invention was prepared by forming a dyed layer.

On the other hand, as a sublimation transfer recording medium, on a 6 μm thick PET film provided with a silicone cured resin M (approximately 1 μm thick) as a back layer, an ink layer coating material [liquid B] with the following formulation was applied to a thickness of approximately 1 μm. A transfer recording medium was obtained by applying the coating to a certain thickness.

cB solution] Polyvinyl butyral resin 10 parts (product name:
BX-1, manufactured by Tanezu Kagaku Co., Ltd.) Sublimation disperse dye for cyan
6 parts (product name: Kayaset 714; manufactured by Nippon Kayaku Co., Ltd.) Methyl ethyl ketone 95 parts Toluene
The obtained 95 copies of the transfer recording medium and the image receiving medium are placed one on top of the other so that the ink layer (i.e. dye transfer layer) of the transfer recording medium and the dyed layer of the image receiving medium face each other, and the back side of the transfer recording medium is exposed to a thermal head. Images were recorded by changing the heating energy. The results are shown in FIG. 2 (curve 1) and Table 1. The recording density of the thermal head is 6 dots/mm, and the recording output is 0.42
It was 1J/dot.

Example 2 A dyed layer was formed in the same manner as in Example 1 except that the following [Liquid C] was used instead of [Liquid A] in Example 1 to produce an image receiving medium of the present invention.

cCC liquid vinyl chloride/vinyl acetate copolymer 20m (product name:
VYHH, manufactured by Union Carbide) 1 part amino-modified silicone oil (product name: K
F393; Shin-Etsu Chemical) Methyl ethyl ketone 4rl solid toluene
Subsequently, 40 copies of the image were recorded in the same manner as in Example 1. The results are shown in FIG. 2 (curve 2) and Table 1.

Example 3 All procedures were carried out in the same manner as in Example 1, except that 5F8417 (trade name), manufactured by Toshi Dow Corning Silicone, was used instead of KF 393 in [Liquid A].
A dyed layer was formed to produce an image receiving medium of the present invention. Subsequently, image recording was performed in the same manner as in Example 1.

The results are shown in FIG. 2 (curve 3) and Table 1.

Example 4 The dyeing layer was prepared in the same manner as in Example 2, except that 5F8417 (trade name) manufactured by Toshi Dow Corning Silicone was used in place of KF 393 in [Liquid A]. An image receiving medium of the present invention was prepared by forming the following. Subsequently, image recording was performed in the same manner as in Example 2.

The results are shown in FIG. 2 (curve 4) and Table 1.

Comparative Example 1 A mixture having the following composition was sufficiently mixed and stirred to prepare a dyed layer coating material [liquid H].

[Liquid H] 20 parts of vinyl chloride/vinyl acetate copolymer (product name:
VYHH Union Carbide) Methyl ethyl ketone 40 parts Toluene
40 parts Next, [Liquid H] was applied using a wire bar onto a synthetic paper (trade name: Yubo FPG-150) with a thickness of about 150 μm, and dried at a drying temperature of 75°C for a minute to a thickness of about 150 μm. A comparative image receiving medium was prepared by forming a dyed layer of 5 μm.

Subsequently, image recording was performed in the same manner as in Example 1, but
Heat fusion occurred and image density could not be measured.

Comparative Example 2 A comparative image-receiving medium was prepared in the same manner as in Comparative Example 1, except that the following [Liquid ■] was used instead of [Liquid H] in Comparative Example 1.

[Liquid I] Polyester resin 20 parts (product name: Vylon 560; manufactured by Toyobo Co., Ltd.) Silicone oil 0.4 parts (product name:
5F-8417, manufactured by Toray Silicone) Methyl ethyl ketone 40 parts Toluene
Subsequently, 40 copies were recorded in the same manner as in Example 1, but thermal adhesion occurred and the image density could not be measured.

Comparative Example 3 A comparative image receiving medium was prepared in the same manner as Comparative Example 1, except that the following [Liquid J] was used instead of [Liquid H] in Comparative Example 1, and image recording was performed. The results are shown in FIG. 2 (curve 5) and Table 1.

[Liquid J] Polyester resin (product name: Byron 200 manufactured by Toyobo Co., Ltd.) Silicone oil (product name: 5F-8417; manufactured by Toray 20 parts 4 parts Silicone Co., Ltd.) Methyl ethyl ketone 40 parts Toluene 40 parts Table 1 Figure 2 and Table 1 shows that according to the image-receiving medium for sublimation thermal transfer of the present invention, a saturated recorded image density of 1.50 or more can be obtained, and thermal fusion does not occur.

[Effects of the Invention] The image receiving medium for sublimation thermal transfer of the present invention is capable of dyeing a sublimation dye on a base material, and contains a substance that is easy to dye and an amine-modified silicone oil in at least the surface layer at a ratio of 3 to 3 to 30% of the dyeable resin. By adopting a structure in which a dyed layer containing 6% by weight is provided, the problem of reducing recording density at the cost of preventing heat fusion during recording, which was observed in conventional image receiving media, is solved. However, high recording density can be obtained. I understand that.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing the image receiving mechanism of the sublimation thermal transfer image receiving medium according to the present invention, and also includes a schematic sectional view of the sublimation thermal transfer recording medium. A...Base material, B dyeing layer, ■...Thermal head, 2
- Heath film of transfer recording medium, 3... Dye transfer layer of transfer recording medium. Further, FIG. 2 shows the optical image density for each opening force O pulse width obtained using the image receiving medium for sublimation thermal transfer of the present invention and for comparison. Curve 1 (solid line) Image density curve 2 (solid line) of the image receiving medium obtained in Example 1, Image density curve 3 (solid line) of the image receiving medium obtained in Example 2, Image density curve 3 (solid line) of the image receiving medium obtained in Example 3 Image density curve 4 (solid line) Image density curve 5 (dotted line) of the image receiving medium obtained in Example 4: Image density of the image receiving medium obtained in Comparative Example 3

Claims (1)

[Claims] In an image-receiving medium having a dyeing layer made of a substance that is easily dyed by sublimation dyes on a base material, the dyeing layer contains 3 to 6% by weight of amino-modified silicone oil based on the dyeable resin. An image receiving medium for sublimation thermal transfer characterized by: