JPS623986A - Ink sheet for thermal transfer recording - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermal transfer recording ink sheet, and more particularly to an ink sheet forming a part of a recording medium used in a transfer type thermal recording device.

[Conventional technology]

In recent years, the spread and progress of information equipment has been remarkable.In particular, with the spread of personal computers, office combination coaters, and word processors, the number of printers installed in these devices has rapidly increased.

Against this background, thermal transfer printers, which are small, lightweight, inexpensive, and highly reliable, perform recording by applying a predetermined amount of heat to an ink sheet and transferring the ink to recording paper.

There are several methods for this thermal transfer, and the typical one uses a 1J-maru head to apply heat to the sheet.
A method of melting and transferring the thermal head heat application part to the transfer paper is to install a wax layer containing nigra ill, and a method in which a sublimable dye is also contained in the binder and the thermal head heat application part is applied. There are methods such as back flowering and diffusion transfer.
Further, as a heating method, there is a type that uses electrical heating via an ink sheet.

All of these require higher sensitivity, that is, high-speed printing, etc., and naturally a material with a relatively low melting point is used as the ink layer. J-t-ridge formation, which has no choice but to take the form of a roll or a stack of sheets, and in this state, a material with a relatively low melting point is used in the ink layer and the ink layer, so the roll pressure or own weight causes There is a problem in that so-called blocking occurs, and this causes migration and peeling of the ink layer, integration due to lateral seepage, or falling off of the ink sheet or ribbon end.

[Problem that the invention seeks to solve]

The problem to be solved by the present invention is to solve the above-mentioned difficulties of conventional ink sheets, that is, the problems caused by so-called blocking that occur when the ink sheet is in the form of a roll or a stack of 11 sheets. It's something to do.

(Means for Solving the Problem) The problem described in - is that a layer consisting of polysiloquiline having a specific terminal vinyl group is preferably formed on the side of the ink sheet to which the heat is applied to a thickness of 0.02-1 mm. This is solved by forming That is, in the present invention, on the side to which heat is applied, the following general formula % formula %) (A is -CH= CLl, -M e is a methyl group,
The present invention relates to a thermal transfer recording ink sheet comprising a layer of polysiloxane having terminal vinyl groups of 9-2 to i, ooo, and oo'o represented by the following formulas (ph represents a phenyl group).

Originally, this type of ink sheet was processed as a backside treatment, and the amount of heat was applied! There are treatments to improve I-fish. In other words, this is a process that attempts to eliminate the sticking phenomenon caused by softening of the Inksee 1-1 material by coating it with a heat-resistant material or by improving the slipperiness of the base material. 13359, JP-A-5
5-146790, JP 56-1557') 4, JP 57-129789, JP 511-171992,
There are JP-A No. 58-187396, etc., and some use silicon-based compounds. However, these are all treatments for the phenomenon of instantaneous sprouting during recording of heat application, and are treatments for improving the instantaneous softening or slipping of the base material that occurs when heat is applied. In these treatments, the thermal properties of the base material or the friction surface of the 11X grinder have a large influence.

On the other hand, the blocking prevention that the present invention attempts to solve is a problem of peeling 111t+g after a long period of time, and is essentially completely different from the above-mentioned conventional treatment that deals with instantaneous phenomena when heat is applied. It is completely unclear whether or not these different methods, which are effective in conventional processing, will be effective when used as they are for blocking prevention according to the present invention.

[Effect]

The general formula (%) used in the present invention represents a phenyl group, and the terminal vinyl group represented by (t) is borine [] giraffe or its copolymer (hereinafter collectively referred to as vinyl-modified polysiloxane). and Hayabusa-2 to 1,00.
0.000 is used. Specific examples of these include, for example, Chisso (Co., Ltd. 88437 generation: 2
-3) ~449.5 (9: i, ooo, ooo)
, PS, 463, PS484, PS468, PS732
, PS735, PS 737,6, PS762, P37
65, PS67.5, PS782, PS785, PS7
87 etc. can be mentioned.

These may be used alone or in combination of 12 or more. In addition, in the present invention, a polymer of (l!!) or a ribomer compound (if) can also be used. In this case, other polymers include, for example, ethylene-vinyl acetate,
Ethylene-based copolymers such as ethylene-acrylic, polystyrene, styrene-nibutadiene copolymers, rubbers, [Rose derivatives, butyral, polyvinyl alcohol, polyamide, polycarbonate-1~, polyvinyl chloride, ■boxymelamine, polyester , polyneethyl polyurethane, and the above-mentioned oligomeric compounds, which are usually used together in a proportion of 0.5 to 80% by weight.

Furthermore, the present invention does not preclude the use of inorganic additives. The inorganic additive at this time is used, for example, in order to avoid a decrease in thermal conductivity, or in the case of electrical heating, to not interfere with the conductivity. Preferred specific examples include gold powder such as silver, Copper, iron, aluminum, etc., metal oxide powders (1t' aluminum, titanium white, glass, etc.), inorganic salt powders such as calcium carbonate, sodium sulfate, clays, etc., and the amount used is usually vinyl-modified polyester. It is about 10-80 parts per weight based on the total amount of siloxane and other additives.

When forming the vinyl-modified polysiloxane layer represented by the above general formula on the side of the ink sheet to which heat is applied, the compound may be applied as is or diluted with an appropriate inert solvent and applied to predetermined locations on the ink sheet. If it is a means, it is formed by applying means or the like. The inert solvent in this case is preferably one with a boiling point of 50-150°C from the viewpoint of workability, and specific examples include toluene, xylene, hexane, vinegar @ I-thyl, butyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone. etc. can be exemplified. The order in which the vinyl-modified polysiloxane layer of the present invention is formed may be after the ink layer is provided on the base material, or the ink layer may be provided after two layers of vinyl-modified polysiloxane are provided on the base material in advance. The coating thickness is 0.02-1/I', preferably in the range of 0.05-0.51018, 0.027
In the following, the uniform effect of the armor is II Samurai 1 scratch.

The ink sheet on which the vinyl-modified polysiloxane layer of the present invention is formed is not particularly limited, and any of the various types that have been conventionally used can be used. Among these, the effects of the present invention are particularly noticeable in the melt-transfer type. These ink sheets are not particularly limited as mentioned above, but to explain the melt transfer type that is preferably used in the present invention as an example: Poly 1 sterfil base with a thickness of about 2-12I' 2-20. On the material, an ink layer prepared from paraffin wax or ester wax having a melting point of about 60 to 100°C and a coloring material together with a filler as a softener and a thermal conductivity improver as required is applied in 2-20. An example can be given of one with a thickness of approximately p.

A wide variety of coloring materials can be used, including pigments such as Kao lit and carbon black, which are listed in Table 11 of the Dye Handbook (published by Maruzen Co., Ltd., 1970), direct dyes, and dispersions. Various dyes 1'11 such as dyes, 13-based dyes R1, and acid dyes can be used.

Particularly preferred are yellow coloring materials having a chlorphenylazo group, magenta coloring materials having a naphtholazo group, and cyan coloring materials having a phthalocyanine structure. As the softener, conventionally used ones can be used, such as ethylene-
Vinyl acetate, ethylene copolymers such as ethylene-acrylic, polystyrene, styrene-butadiene polymers,
Rubbers, cellulose derivatives, butyral, polyvinyl J real alcohol, polyamide, polycarbonate, polyvinyl chloride, poxymelamine, polyester, polyether polyurethane, and substances that can be easily melted by heat such as the above A ribomer compounds, or IL Examples include lubricating oil.

Fillers that have been conventionally used can be used, such as metal powders such as silver, copper, iron, aluminum, etc., metal oxide powders such as alumina, titanium white, glass cutting, etc., and inorganic In powders such as calcium carbonate. , sodium sulfate, clay, etc. can be mentioned as specific examples.

〔Example〕

EXAMPLES The present invention will be specifically described below with reference to Examples.

Example 1゜Paraffin wax #155 (softening point 69°C) 100 weight parts and carbon black M'A-820 weight part 10
A black hot melt ink was prepared by melting and dispersing at 0°C.

I would like to hot-melt coat this ink on a polyester film with a thickness of 42 mm under heating (comparison material). Five of these ink sheets were stacked on top and back alternately, sandwiched between two glass plates, and heated to 50°C under a weight of 5009.
It was heated in a constant temperature bath.

- As an ink sheet of the present invention, a 1% toluene solution of IJ vinyl modified polysiloxane PS 437 (/Y/= 2 to 3) made by Chisso Corporation was applied to the back side of the above ink sheet 13=1 6.Air-dried 61.5 ') Coating thickness 110/271
Yes (product of this invention). Five ink sheets of the present invention were stacked alternately on the front and back sides in the same way as above, sandwiched between two glass plates, and 500g was applied to the comparative material at the same time as the above comparative material.
It was heated in a constant temperature bath at ℃. When I took out the ryoji sashimi after heating it for 24 hours, I found that the comparison material had caused some bulging, and when I tried to peel it off, I found random transfers of the ink on the back side.

-6 No deterioration was observed in the ink sheet having the vinyl-modified polysiloxane layer of the present invention on the back surface even when it was peeled off.

Example 2 Oxidized wax NPS-9125 (softening point 63°C) 100
Heavy fist and β-naphthol azo pigment Permar
A magenta hot melt ink was prepared by melting and dispersing 7 parts by weight of Carmine FBB O2 at 100°C.

This ink was hot-melt coated under heating to a thickness of 47mm on a polyT stell film with a thickness of 6mm (11mm thick).
- comparative interest). As in Example 1, 5 sheets of this ink sheet were stacked with the front and back sides alternately stacked, sandwiched between two glass plates, and
It was heated in a constant temperature bath at 50° C. under a weight load of 9. On the other hand, as an ink sheet of the present invention, a 1% toluene solution of vinyl-modified polysiloxane PS463 manufactured by Chisso Corporation was applied to the back surface of the above ink sheet and air-dried. This coating thickness is 0
．． It was 271. Five ink sheets of the present invention were stacked on the front and back sides in the same way as described in -F, sandwiched between two glass plates, and 500 ml was applied at the same time as the above comparative material under a soog weight load.
It was heated in a constant temperature bath at ℃. When the Ryoji Vjl was taken out after heating for 24 hours, blocking had occurred in the comparison material, and when an attempt was made to peel it off, it was found that the ink had been transferred to the back side of the rung l\. On the other hand, in the ink sheet having the vinyl-modified polysiloxane layer of the present invention on the back surface, no deterioration was observed even when the sheet was peeled off.

〔effect〕

As can be seen from the above examples, the ink sheet of the present invention exhibits extremely excellent blocking resistance.

(Below)

Claims (5)

[Claims] (1) On the side where the amount of heat is applied, the following general formula ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (q = 2 ~ 20 %) (where A is -CH=CH_2, Me is a methyl group, and Ph is a phenyl group). A thermal transfer recording ink sheet made of (2) Claim 1, wherein the layer made of polysiloxane having a terminal vinyl group has a thickness of 0.02 to 1μ.
Thermal transfer recording ink sheet described in Section 1. (3) The thermal transfer recording ink sheet according to claim 1 or 2, wherein the ink sheet is of a melt transfer type. (4) The claim that the melt transfer type ink sheet is prepared from a paraffin wax or ester wax having a melting point of 60-100°C and a coloring material on a 2-12μ polyester film base material. The thermal transfer recording ink sheet according to item 3. (5) Claims 1 to 4, wherein the coloring material contained in the ink sheet is a yellow coloring material having a chlorphenylazo group, a magenta coloring material having a naphtholazo group, or a cyan coloring material having a phthalocyanine structure. The thermal transfer recording ink sheet according to any one of the above.