JP2646644B2 - Image receptor for thermal transfer recording - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image receiving body used in sublimation type thermal transfer recording using a recording means such as a thermal head, an optical head such as a laser, and a current-carrying head.

2. Description of the Related Art Saturated polyester resins have been well studied for dyeing layers of image receivers used in sublimation type thermal transfer recording because of their high dyeing properties. However, since a saturated polyester resin alone has a problem of fusing with a transfer body (color sheet) at the time of recording, it has been proposed to combine with another heat-resistant resin or to constitute a dyeing layer with a curable resin (for example, JP-A-58-2129
No. 94).

Problems to be Solved by the Invention When a dyeable resin is composed of a curable resin, it is unknown that the curable resin having high dyeability is known, and the radical polymerizable resin that is a curable resin is an oxygen in the air. An uncured portion is generated on the coating layer surface due to the inhibition. Since the unreacted resin remains in the uncured portion, the unreacted resin reacts with the dye to cause a problem of deteriorating the dye.

An object of the present invention is to obtain an image receiving body having a dyeing layer having high recording sensitivity and high storage reliability.

Means for Solving the Problems A dyeing layer containing a cured product of a moisture-reactive silicon-containing acrylic urethane resin as a dyeing material for a disperse dye is formed on a substrate.

Action The moisture-reactive silicon-containing acrylic urethane resin cross-links with moisture in the air, so that almost no unreacted resin remains on the surface of the dyeing layer. In addition, the cured product does not cause a problem of deteriorating the dye by reacting with the dye. Since it has an acrylic and urethane bond in its molecular structure, it exhibits high dyeing properties.

Embodiment FIG. 1 is a schematic sectional view of a thermal transfer recording image receiver according to an embodiment of the present invention.

 This is a structure in which a dyeing layer 2 is provided on a base material 1.

The substrate 1 is not particularly limited. Especially good is synthetic paper,
White extruded film, transparent film, paper and the like.

The dyeing layer 2 is formed from a cured product of a moisture-reactive silicon-containing acrylic urethane resin, or at least contains a cured product of a moisture-reactive silicon-containing acrylic urethane resin. As a moisture-reactive silicon-containing acrylic urethane resin, a resin modified by further introducing fluorine etc.
This is particularly useful because the effect of preventing fusion to the color sheet is very excellent. The moisture-reactive silicon-containing acrylic urethane resin is a silyl group and / or silanol group-containing moisture-reactive silicon-containing acrylic urethane resin. The crosslinkable silyl group (the silanol group) reacts with moisture in the air to form a cured coating film. As the silyl group, for example, a silyl group in which a hydride group, a halogen group, an alkoxy group, an acyloxy group, an amino group, an amide group, an aminoxy group, an alkenyloxy group, an oxime group, a thioalkoxy group, or the like is bonded to a silicon atom can be used. The higher the urethane group / acryl group ratio of the moisture-reactive silicon-containing acrylic urethane resin, the higher and better the dyeing properties. In particular, it is good when this ratio is 0.3 or more. As the moisture-reactive silicon-containing acrylic urethane resin, for example, Kryamar (trade name, Sanyo Chemical Industries, Ltd.) can be used.

The dyeing layer can contain various dyeing resins in addition to the moisture-reactive silicon-containing acrylic urethane resin. For example, a saturated polyester resin, an epoxy resin, a urethane resin, an acrylic resin, a cellulose acetate resin, or the like can be used. In particular, when used in combination with a saturated polyester resin, the recording sensitivity is high and good. The saturated polyester resin can be used by adding 10 times or more by weight of the solid content to the moisture-reactive silicon-containing acrylic urethane resin.

The dyeing layer may contain various additives such as a lubricant, a surfactant and an antistatic agent. Further, a suitable intermediate layer such as an adhesive layer may be provided between the substrate and the dyeing layer. Hereinafter, specific examples will be described.

Example 1 Polypropylene synthetic paper (thickness, 100 μ
m), 50 parts by weight of a moisture-reactive silicon-containing acrylic urethane resin solution (SF-44, 55% by weight of an active ingredient, Sanyo Chemical Industries, Ltd.) and a catalyst (Cat.FX, Sanyo Chemical Industries) Coating (1.5% by weight) was applied with a wire bar and cured in an oven at 100 ° C. for about 6 hours to prepare an image receiving body having a dyeing layer having a thickness of 5 μm.

Next, an ink composed of 2.5 parts by weight of a cyan dye having the following structural formula, 4 parts by weight of polysulfone, and 100 parts by weight of monochlorobenzene is coated with a saturated polyester resin layer (anchor coat layer) having a lubricating heat-resistant layer on the lower surface and a thickness of 0.1 μm on the upper surface. ) Is coated with a wire bar on an anchor coat layer of polyethylene terephthalate film (thickness, 6 μm) having a thickness of about 1
A transfer body having a μm color material layer was produced.

The image receiving member and the transfer member were sandwiched between a thermal head and a platen, and a pressure of about 4 kg was applied thereto, and recording was performed under the following conditions.

Dot density for main and sub scanning: 4 dots / mm Recording power: 0.55 W / dotHead heating time: 2 to 8 ms As a result, the dyed layer does not fuse with the transfer body at all and heats the head. At a time of 8 ms, a recording density of 1.70 was obtained.

Next, this recorded image is placed in a thermo-hygrostat at 60 ° C. and 60% RH for 30 minutes.
After leaving for 0 hours, no reduction in the density of the recorded image occurred.

Example 2 On the same substrate as in Example 1, a saturated polyester resin (VY
LON, RV-220, Toyobo Co., Ltd.) 5 parts by weight, moisture-reactive silicon-containing acrylic urethane resin (UA-53F, active ingredient 44% by weight, Sanyo Chemical Industries, Ltd.) 10 parts by weight, catalyst (Cat.FX) ) A coating consisting of 0.3 parts by weight, 5 parts by weight of toluene, and 5 parts by weight of methyl ethyl ketone is applied with a wire bar, and cured in an oven at 100 ° C. for about 6 hours to form a dyeing layer having a thickness of about 5 μm. An image receiver was prepared.

Using this image receiving body and the transfer body produced in Example 1, recording was performed under the same recording conditions as in Example 1.

As a result, the dyed layer did not fuse with the transfer member at all, and a recording density of 1.82 was obtained.

Next, it was stored at 60 ° C. and 60% RH for 300 hours, but no decrease in the recording density occurred.

Example 3 On the same substrate as in Example 1, 63 parts by weight of an internally plasticized saturated polyester resin (VYLON300, Toyobo Co., Ltd.), an acrylic urethane resin containing moisture-reactive silicon (SF-44, 55% by weight of active ingredient) Sanyo Kasei Kogyo Co., Ltd.) 11 parts by weight, 0.33 parts by weight of catalyst (Cat.FX), 63 parts by weight of toluene, 63 parts by weight of methyl ethyl ketone After coating with a wire bar, about 6 hours in an oven at 100 ° C After a curing reaction, a dyeing layer having a thickness of about 5 μm was formed to produce an image receiving body.

Using this image receiving body and the transfer body produced in Example 1, recording was performed under the same recording conditions as in Example 1.

As a result, the dyed layer did not fuse with the transfer body at all, and a recording density of 1.95 was obtained.

Next, it was stored at 60 ° C. and 60% RH for 300 hours, but no decrease in the recording density occurred.

Comparative Example A radically polymerizable resin (SP-
4010, Showa Polymer Co., Ltd.) 30 parts by weight, Irgaki Yua
184 (Nippon Ciba Geigy Co., Ltd.) A coating consisting of 1.5 parts by weight of methyl ethyl ketone and 80 parts by weight of methyl ethyl ketone is applied and dried with a wire bar, and then irradiated with a high pressure mercury lamp under a nitrogen atmosphere to be cured to form a dyeing layer having a thickness of about 5 μm. Was.

Using this image receiving body and the transfer body produced in Example 1, recording was performed under the same recording conditions as in Example 1.

The recorded image was stored at 60 ° C. and 60% RH for 300 hours. As a result, the recorded density decreased by about 8% from the initial value.

Effects of the Invention By forming a dyeing layer containing a moisture-reactive silicon-containing acrylic urethane resin cured product as a dyeing material for a disperse dye on a substrate, a dyeing layer having high recording sensitivity and high storage reliability is obtained. An image receiving member having the same can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of an image receiving body for thermal transfer recording according to one embodiment of the present invention. 1 ... substrate, 2 ... dyeing layer.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Keiichi Yubagami 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-59-20360 (JP, A)

Claims (4)

(57) [Claims] An image receiving body for thermal transfer recording, comprising a dyeing layer containing a moisture-reactive silicon-containing acrylic urethane resin cured product as a dyeing material for a disperse dye on a substrate. 2. The image receiving body for thermal transfer recording according to claim 1, wherein the moisture-reactive silicon-containing acrylic urethane resin is a fluorine-modified resin. 3. The image receiving body for thermal transfer recording according to claim 1, wherein the urethane group / acryl group ratio of the moisture-reactive silicon-containing acrylic urethane resin is 0.3 or more. 4. The image receiving body for thermal transfer recording according to claim 1, wherein the dyeing layer contains a saturated polyester resin.