JPS623987A - Ink sheet for thermal transfer recording - Google Patents

Abstract

PURPOSE:To obtain an extremely excellent anti-blocking property, by providing a layer of a material obtained by cross-linking and hardening a specified polysiloxane having a terminal vinyl group by a peroxide in a specified thickness on the side on which heat is applied. CONSTITUTION:The layer of a material obtained by cross-linking and hardening a polysiloxane having a terminal group with eta=2-1,000,000 of formula (1), (2) or (3), wherein A is -CH=CH2, Me is methyl and Ph is phenyl, be a peroxide is provided on the side on which heat is applied. The peroxide is preferably a diacyl peroxide such as benzoyl peroxide. The thickness of the layer in the hardened state is set to be 0.02-1mum. If the thickness is less than 0.02mum, a uniform effect can not be expected, whereas if the thickness is more than 1mum, the sensitivity of the ink sheet is lowered. Accordingly, blocking can be prevented from occurring where the ink sheet is rolled or stacked.

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. Regarding.

(Prior Art) In recent years, the spread and progress of information devices has been [1] particularly important, especially personal computers, electronic devices, electronic devices, electronic devices, electronic devices, etc.
Wordpress+:+1=With the popularity of tuna, the number of printers installed on these devices has increased rapidly.

Despite these costs, thermal transfer printers, which are small, lightweight, low-priced, and highly reliable, perform recording by applying a predetermined amount of heat to the ink sheet 1 and transferring the ink to the recording paper 1. be.

There are several types of thermal transfer, and the typical one uses a thermal head to apply heat, a wax layer containing pigment is placed on the sheet (), and the thermal head heat application part is connected to the transfer paper. There is a method of melting and transferring the same, a method of sublimation and diffusion transfer by applying a heated product to a multi-head, and a method of sublimation and diffusion transfer by applying a heated product to the same head, and a method of applying electricity through an ink sheet using a heating method. There are also types that use heating.

All of these require higher sensitivity, ie, high-speed printing, and naturally a material with a relatively low melting point must be used as the ink layer. However, this ink sheet was made into a cartridge for convenience in installing it in the printer.
In this state, a material with a relatively low melting point is used as the ink layer, so the so-called "one book" type is formed due to the rolling pressure or its own weight. This causes problems such as migration and peeling of the ink layer, integration due to lateral seepage, or falling off of the ink sheet and ribbon ends.

- [Problems to be Solved by the Invention] The problems to be solved by the present invention are the above-mentioned difficulties of conventional ink sheets, that is, problems that occur when the ink sheet is in the form of a single roll or a stack of sheets. It is an attempt to solve the problems based on so-called B1 coxing.
(Means for solving the problem) The above problem is caused by the use of a peroxide bridge W6v of polysiloxane having a specific terminal vinyl group on the side of the ink sheet to which the heat is applied. ! This problem is solved by forming a layer consisting of a compound with a thickness of preferably 0.02-1". That is, the present invention provides the following general formula (%) on the side to which the amount of heat is applied (where A is -c l-1=c, +-+4, Me is a methyl group, pl+ (represents JL phenyl group) -2~1.0'00,000 polysiloxy4 with a terminal vinyl group 61 This invention relates to a heat-sensitive transfer recording ink sheet consisting of a cured product obtained by cross-linking and curing Norn with a peroxide (forming seven layers 1)'.

Originally, there was a treatment for the back side of this type of InkC1-C1 to improve the moving point that occurs when heat m is applied to it. In other words, Ink Sea 1 is a treatment that attempts to eliminate the sticking phenomenon caused by softening of the base material by covering it with a heat-resistant bamboo material or by improving the bamboo by crushing the base material.
Regarding these, for example, Special Publication No. 58-13359,
JP-A-55-146790, JP-A-56-155794
, JP-A-57-129789, JP-A-58-171'1
92, JP-A-58-187396, etc., and some use silicon-based compounds. However, all of these treatments are treatments for the instantaneous phenomenon of heat application, and are treatments to improve the instantaneous softening or slipping of the base material that occurs when heat is applied. In this case, the heat of the base material or the friction surface of the base material (J
The characteristics of

On the other hand, the blocking prevention that the present invention seeks to solve involves the problem of releasability after long-term use, and the above-mentioned conventional treatment that deals with instantaneous phenomena when applying heat m is essentially It is completely unknown whether or not these methods, which are effective in conventional processing, will be effective when used as they are in the anti-blocking method 1F of the present invention.

[Effect]

General formula used in the present invention (% formula %) (where A is 10 H= CI-1, Me is a methyl group,
(Ph represents a phenyl group) AL-2 to 1.000,000 polysiloxanes having terminal vinyl groups (hereinafter collectively referred to as vinyl-modified polysiloxanes) include those manufactured by Chisso ■. Notobe, p3437 (At: 2-3) ~
449. ．． 5 (τ: 1..000,00(1)
, PS 463, PS 464735, PS 737
．．・6, p 3 , 762, PS 765, PS 76
-7.5, p3782, PS785, l'''8787, etc.

Peroxides used in the present invention include:

Peresters such as tertiary butyl peractoate and tertiary butyl perbivalate, bis-(nisdel percarbonate such as 4-tert-butyl cyclohexylate, diasilver oxide such as benzoyl peroxide, di- Examples include dialkyl peroxides such as tertiary butyl peroxide and dicumyl peroxide, hydroperoxides such as cyclohexanone per A4 oxide, and methyl ethyl ketone per A4 oxide, preferably diacyl peroxides such as benzoyl peroxide. .

In addition, in the present invention, other polymers or oligomeric compounds can also be used in combination, such as ethylene copolymers such as ethylene-vinyl acetate, T-tyrene-acrylic, and polystyrene. ,
Examples include styrene-butadiene copolymers, rubbers, cellulose derivatives, butyral, polyvinyl alcoholate, polyvinyl chloride, epoxymelamine, polyesters, polyether polyurethanes, and the above oligomeric compounds, and these are usually 0.5 Used in combination at a ratio of .80% by weight.

Furthermore, the present invention does not preclude the use of inorganic additives. The inorganic additives used in this case are used, for example, in order to avoid a decrease in thermal conductivity, or in the case of electrical heating, for the purpose of not interfering with the conductivity. Preferred specific examples include metal powders such as silver, copper, and iron.

Metal oxide powder IC such as alumina, etc.
Examples include titanium white, glass, etc., inorganic salt powders such as calcium carbonate, sodium sulfate, clays, etc.
The amount used is usually about 10-80 parts by weight based on the total amount of vinyl-modified polysiloxane and other additives.

When forming a cured layer of vinyl-modified polysiloquiline represented by the above general formula on the heat-applied side of Inksy 1-, the compound and peroxide may be used as is or diluted with an appropriate inert solvent. It is formed on a predetermined portion of an ink sheet by an appropriate means such as a coating means, and then cross-linked and cured by a predetermined treatment. Inactive +1 at this time
1 as a solvent (boiling point 50-150°C for better workability)
Preferably, the knob is, for example, Torni [-
Examples include xylene, hexylene, ethyl acetate, butyl acetate, acetate, methyl ethyl ketone, and methyl isobutyl ketone. The order of forming the cured layer of vinyl-modified polysiloxane according to the present invention is as follows: In step 1, an ink layer may be formed on the base material. ．． An ink layer may then be provided. Coating thickness number, 1 The thickness of the cured product is in the range of 0.02 = 1, preferably 0.05-0.5, and below 0.02, the uniform effect is l! I
If it is more than 1, the electric shock of the ink sheet will decrease, which is not desirable.

If a solvent is used for this treatment, the cured product layer must be volatilized to prevent the interlayer or beam material from being weakened, usually 60 to 100%.
When heated to ℃, it becomes 1 wa.

The ink sheet on which the cured layer of vinyl-modified polygyro-1-phosphorus of the present invention is formed is not particularly limited, and any of the various types 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, it can be applied to a polyester film base material with a thickness of about 2 to 12 μm. Then, an ink layer prepared from paraffin wax or ester wax having a melting point of about 60-100°C and a coloring material, along with a filler as a softener and a thermal conductivity improver as necessary, is provided to a thickness of about 2-2074°C. I can give examples.

A wide variety of coloring materials can be used; for example, pigments listed in the face table in the Dye Handbook (published by Maruzen Co., Ltd., 1970), pigments such as carbon black, direct dyeing 11, Various dyes such as disperse dyes, basic dyes, and acid dyes can be used.

In particular, yellow coloring materials are preferably those having a 1] ruphenylazo group, magenta coloring materials are preferably having a naph]--luazo group, and cyan coloring materials are preferably having a phthalocyanine structure.

As softeners, conventionally used ones can be used, such as ethylene-based copolymers such as ethylene-vinyl acetate, ethylene-acrylic, polystyrene, and styrene-based softeners.
Easily heat-meltable substances such as butadiene copolymers, rubbers, cellulose derivatives, butyral, polyvinyl alcohol, polyamides, polycarbonates, polyvinyl chloride, epoxymelamine, polyesters, polyether polyurethanes, and the above oligomeric compounds, or lubricants. Examples include oil.

Fillers that have traditionally been used can be used, such as metal powders such as silver, copper, iron, aluminum, etc., metal oxide powders such as alumina, titanium white, glass, etc., and inorganic salt powders such as calcium carbonate and sodium sulfate. Specific examples include l\, clay, and the like.

〔Example〕

The present invention will be specifically explained with reference to Examples 6 below.
゛Example 1゛Paraffin wax #155 (softening point 69°C) 100 weights and carbon black MA-8. , 20 heavy lifting parts in 1
A black hot melt ink was prepared by melting and mixing and dispersing at 00°C.

This ink was hot-melted on a JIII mr polyester film with a thickness of 6 mm to a thickness of 4/P (comparative material). 5 Ink sheets of ε are crossed on the front and back H.
The sheets were stacked, sandwiched between two glass plates, and heated in a constant temperature bath at 50° C. under a weight of 50,090.

-6 As an ink sheet of the present invention, on the back side of the above ink sheet, a vinyl modified bamboo borish made by Chisso Co., Ltd. [1Kisan PS
5 parts by weight of benzoyl peroxide was added to a 1% 1 heluene solution of 437 (1, = 2-3) per 100 parts of vinyl modified 11I polysiloxane, and this was applied and cured by heating. . This thickness was 0.2 (product of the present invention). Five sheets of the Intasheet of the present invention were stacked alternately on the front and back sides in the same manner as above, and sandwiched between two glass plates.
Under a weight load of 00jJ, at the same time as the above comparative data, 50℃
It was heated in a constant temperature bath. When both materials were taken out after heating for 24 hours, it was found that Comparative Material No. 11 had caused blocking, and when attempts were made to peel it off, random transfer of the ink to the back side was observed. -6 No deterioration was observed in the ink sheet having the vinyl-modified polysiloxy+tan cured product layer of the present invention on the back surface even when it was peeled off.

Example 2 Acid value wax NPS-9125 (softening point 63°C) 100
Weight part and β-naphthol azo pigment Permane
A magenta hot melt ink was prepared by melting and dispersing nt Carmine F B B O2, heptadite at 100°C.

4. Apply this ink on a 6I' thick polyester film under heating. Hot-melt coating was applied to the thickness of IA (comparison material). As in Example 1, 5 sheets of this ink sheet were stacked alternately on the front and back sides, sandwiched between two glass plates, and
It was heated in a constant temperature bath at 50° C. under a weight of 0 g. −
6. As an ink sheet of the present invention, a vinyl modified polyurethane [lxane PS46 manufactured by Chisso Co., Ltd.] is coated on the back side of the above ink sheet.
5 parts of benzoyl peroxide was added to a 301% toluene solution in the same manner as in Example 1, and after coating, it was heated and cured.

The thickness of this cured product was 0.2μ. Five ink sheets of the present invention were stacked alternately on the front and back sides in the same manner as above, and 2
It was placed between two glass plates and humidified in a constant temperature bath at 50° C. at the same time as the above comparative material under a weight of 500 g. When both sheets were taken out after heating for 24 hours, blocking had occurred on the IL reference sheet, and when an attempt was made to peel it off, ink was randomly transferred to the back surface. -6 No deterioration was observed in the ink sheet having the vinyl-modified polysiloxane cured layer of the present invention on the back surface even when it was peeled off.

〔effect〕

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

(that's all)

Claims (8)

[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 %) (However, A is -CH=1-CH_2, Me is a methyl group, P
h represents a phenyl group) Polysiloxane having a terminal vinyl group with m = 2 to 1,000,000 is crosslinked and cured with a peroxide to form a layer of a cured product. Thermal transfer recording ink sheet. (2) The thermal transfer recording ink sheet according to claim 1, wherein the layer made of the cured polysiloxane having a terminal vinyl group has a thickness of 0.02 to 1 μm. (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) The thermal transfer recording ink sheet according to claim 1, wherein the peroxide is a diacyl peroxide type. (6) The thermal transfer recording ink sheet according to claim 1, wherein the peroxide is a diacyl peroxide type. (7) The thermal transfer recording ink sheet according to claim 1, wherein the peroxide is a hydroperoxide type. (8) 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.