JPS6233684A - Thermal transfer sheet - Google Patents

Abstract

PURPOSE:To prevent occurring of scummings in a non-image portion due to color development caused by rubbing pressure when a thermal transfer is carried out on a receiving sheet laid over a transfer sheet by using the thermal head, by providing a thermal transfer layer on the surface of a substrate and further a film of a mixture of perfluroalkyl acrylate resin and polyether modified silicone oil on the reverse surface thereof. CONSTITUTION:A film of a mixture of perfluoroalkyl acrylate and polyether modified silicone oil is formed on the reverse surface of a thermal transfer sheet. As a result, the perfluoroalkyl group deteriorates the critical surface tention, alloxing the slip characteristics between the thermal head and the transfer sheet to be remarkably enhanced as well as the sticking of the transfer sheet to the thermal head to be effectively prevented. Accordingly, the repeated use of the same transfer sheet cannot induce the problem of scummings due to color development caused by rubbing pressure, which enables the transfer image to be always uniform. It is preferable that the mixture is mixed in the proportion of 0.01-5pts.wt. of polyether modified silicone oil to 100pts.wt. of perfluoroalkyl acrylate resin.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to a thermal transfer sheet.

[Prior art]

Conventionally, thermal transfer media include those consisting of a transfer sheet in which a heat-sublimable dye is provided on a support and a receiving sheet that receives a heat-sublimable dye image by thermal printing from the back side of the sheet, or a heat-fusible material. A combination of a transfer sheet and a receptor sheet is known, in which a transfer layer of pigments or dyes is provided on a support.Also, substances that react with each other to produce color when heated are supported on separate supports, and this A thermal transfer medium is also known in which thermal printing is performed by bringing support layers into opposing contact with each other.

However, in any of the above-mentioned methods, when the transfer sheet and the receiving sheet are overlapped and thermal print recording is performed from the back side of the transfer sheet using a thermal head, there is a drawback that background smear (color development in non-image areas) occurs due to rubbing pressure color development. can be seen.

Conventionally, a heat-resistant protective layer 1 is placed on the back side of the transfer sheet or transfer ribbon.
For example, epoxy resin, melamine resin.

It is known to provide a thin film of phenolic resin, fluororesin, polyimide resin, nitrocellulose, silicone oil, silicone varnish, or the like.

However, although such a protective layer shows the effect of improving the sticking phenomenon, it does not show the effect of preventing background smearing caused by rubbing pressure coloring in the non-image area during the above-mentioned thermal print recording.

〔the purpose〕

An object of the present invention is to provide a heat-sensitive transfer sheet that is prevented from background smearing caused by rubbing and pressure coloring in non-image areas when a transfer sheet is stacked on a receiving sheet and thermal transfer is performed using a thermal head.

〔composition〕

According to the present invention, there is provided a heat-sensitive transfer sheet, characterized in that a heat-sensitive transfer layer is provided on the surface of a support, and a thin film of a mixture of perfluoroalkyl acrylate resin and polyether-modified silicone oil is provided on the back surface of the heat-sensitive transfer layer. be done.

The thermal transfer sheet of the present invention is obtained by overlaying this with a receiving sheet,
A thermal transfer image can be formed on the receiving sheet by thermal printing from the back side of the thermal transfer sheet. In this case, the back side of the thermal transfer sheet is coated with a mixture of perfluoroalkyl acrylate and polyether-modified silicone oil. By providing a thin film, the contact resistance between the heat-sensitive transfer sheet and the receiving sheet is reduced and pressure coloring due to rubbing is prevented, so even if the same transfer sheet is used many times, it will not occur as seen in conventional technology. There is no problem of background staining due to rubbing pressure color development, and a uniform transferred image without background staining is always obtained on the sheet.

The perfluoroalkyl acrylate resin used in the present invention is a conventionally known substance, and its perfluoroalkyl group reduces the critical surface tension, thereby significantly improving the slipperiness between the thermal head and the transfer sheet.
To effectively prevent a transfer sheet from sticking to a thermal head.

Further, the polyether-modified silicone oil used in the present invention has a polyether structure bonded to the molecular chain of silicone oil, and its molecular structure can be represented by, for example, the following general formula.

vA In the above formula, R1 represents an oxyalkylene group such as +CzH40C or 1+C3H60 (in the formula, n is a number of 1 or more), or a copolymerized oxyalkylene group obtained by copolymerizing these oxyalkylenes. POA is jC2H4
A group represented by 0 and 1", in which R2 is hydrogen or an alkyl group such as methyl, ethyl, propyl,
m is a number of 0 or 1 or more.

The polyether modified silicone oil used in the present invention is
As mentioned above, any silicone oil structure in which a polyether structure is bonded may be used, and the polyether-modified silicone oil used in the present invention may include epoxy-modified or alkyl-modified silicone oil, in addition to those represented by the general formula above. , those obtained by copolymerizing various aralkyl-modified silicones with the polyether-modified silicone oil are also included.

The mixing ratio of the perfluoroalkyl acrylate resin and the polyether-modified silicone oil is 0.01 to 5 parts by weight, preferably 0.01 to 0.5 parts by weight of the polyether-modified silicone oil per 100 parts by weight of the perfluoroalkyl acrylate resin. It is best to express it in parts by weight.

Generally, in the case of heat-sensitive transfer sheets that use plastic film as a support, a single transfer will give a clear transferred image, but multiple transfers will damage the support film and make it difficult to obtain a clear transferred image. However, in the case of the thermal transfer sheet of the present invention, there is no such problem, and even after multiple transfers, there is no damage to the support film, no fusion with the thermal head, and clear images. A transferred image can be obtained.

Formation of a thin film of a mixture of perfluoroalkyl acrylate resin and polyether-modified silicone oil on the support can be carried out by a conventionally known method, for example, by using a back treatment agent containing a commercially available perfluoroalkyl acrylate resin. This can be done by mixing commercially available polyether-modified silicone oil and coating the mixture on a support and drying it, or by applying a thin film of a mixture of perfluoroalkyl acrylate resin and polyether-modified silicone oil formed in advance. This can be done by laminating and adhering to a support.

In this case, if the thickness of the thin film of the mixture of perfluoroalkyl acrylate resin and polyether-modified silicone oil becomes too thin, the heat resistance will be insufficient, and if it is too thick, the heat sensitivity will decrease. In the case of 5 pm or less, preferably 0.01 to 5 μm, especially 0
．． The thickness is preferably 0.3 to 2 μm.

The heat-sensitive transfer sheet of the present invention includes those of various conventionally known systems, but in particular, a heat-sensitive transfer sheet having a transfer layer containing a leuco dye, and a heat-sensitive transfer sheet having a heat-fusible colored ink layer as a transfer layer. Preferred examples include a heat-sensitive transfer sheet, a heat-sensitive transfer sheet having a heat-sublimable or heat-vaporizable dye layer as a transfer layer, and the like.

The heat-sensitive transfer sheet having a transfer layer containing a leuco dye according to the present invention is provided by providing a transfer layer containing a leuco dye on the surface of a support, such as paper, synthetic paper, especially a plastic film. A thin film of a mixture of perfluoroalkyl acrylate resin and polyether-modified silicone oil is provided on the back side. As the leuco dye in this case, any dye conventionally used for pressure-sensitive paper or thermal paper can be used, and triphenylmethane-based, fluoran-based, phenothiazine-based, auramine-based, and spiropyran-based ones are preferably used. be done.

Specific examples of these leuco dyes are shown below.

3.3-bis(p-dimethylaminophenyl)-phthalide, 3.3-bis(p-dimethylaminophenyl)-6-dimethylaminophthalide (also known as crystal violet lactone), 3.3-bis(P- dimethylaminophenyl)-6-diethylaminophenyl, 3.3-bis(P-dimethylaminophenyl)-6-chlorphthalide, 3.3-bis(P-dibutylaminophenyl)phthalide, 3-cyclohexylamino-6-chlorfur Oran.

3-dimethylamino-5,7-dimethylfluorane, 3
-diethylamino-7-chlorofluorane.

3-diethylamino-7-methylfluorane, 3-diethylamino-7,8-benzfluorane.

3-diethylamino-6-methyl-7-chlorofluorane, 3-(N-p-tolyl-N-ethylamino)-6-methyl-7-7nilinofluorane.

3-pyrrolidino-6-methyl-7-anilinofluorane, 2-(N-(3'-trifluoromethylphenyl)amino)-6-dinithylaminofluorane.

'2-(3,6-bis(diethylamino)-9-(o
-chloranilino)xantylbenzoic acid lactam).

3-diethylamino-6-methyl-7-(m-trichloromethylanilino)fluoran, 3-diethylamino-7-(o-chloroanilino)fluoran, 3-dibutylamino-7-(o-chloroanilino)fluoran.

3-N-methyl-N-amylamino-6-methyl-7-
Anilinofluorane, 3-N-methyl-N-cyclohexylamino-6-methyl-7-anilinofluorane, 3-diethylamino-6-methyl-7-anilinofluorane, 3-(N,N-diethylamino )-5-methyl-7-(
N.

N-dibenzylamino)fluoran.

Benzoylleucomethylene blue, 6'-chloro-8'-methoxy-benzoindolino-pyrylospirane, 6'-bromo-3'-methoxy-benzoindolino-pyrylospirane.

3-(2'-hydroxy-4'-dimethylaminophenyl)-3-(2'-methoxy-51-chlorophenyl)phthalide, 3-(2'-hydroxy-4'-dimethylaminophenyl)-3-( 2'-methoxy-5'-nitrophenyl) phthalide, 3-(2'-hydroxy-4'-diethylaminophenyl)-3-(2'-methoxy-5'-methylphenyl) phthalide.

3-(2'-methoxy-4'-dimethylaminophenyl)-3-(2'-hydroxy-4'-chloro-5'
-methylphenyl) phthalide, etc.

In the present invention, the leuco dye is
Usually 0.3-30g/n+", preferably 0.5-2
It is used at a rate of about 0 g/m''.

The receptor sheet for the leuco dye-based heat-sensitive transfer sheet is one in which a receptor layer containing a color developer for the leuco dye as a main component is provided on a support such as paper, synthetic paper, or plastic film. In this case, as the color developer, an electron-accepting substance such as a phenolic substance, an organic acid or a salt or ester thereof is used, and from the viewpoint of practicality, one with a melting point of 200°C or less is preferably used. . Specific examples of color developers preferably applied in the present invention are shown below.

Note that the numbers in parentheses indicate the melting point.

4-*ert:,-butylphenol (98), 4-
Hydroxydiphenyl ether (84), 1-naphthol (98), 2-naphthol (121), methyl-4-
Hydroxybenzoate (131), 4-hydroxyacetophenone (109), 2,2'-dihydroxydiphenyl ether (79), 4-phenylphenol octylcatechol (100), 2,2'-dihydroxydiphenyl (103), 4,4' -methylenebisphenol (160), 2,2' -methylenebis(4
-chlorophenol) (164), 2,2'-methylenebis(4-methyl-6-tert.-butylphenol) (125), 4,4'-isopropylidene diphenol (156), 4,4'-isopropylidene Bis(2-chlorophenol) (90), 4,4'-isopropylidene bis(2,6-dibromophenol) (17
2), 4,4'-isopropylidene bis(2-ter
(butylphenol) (110), 4,4'-isopropylidenebis(2-methylphenol) (136)
, 4,4'-isopropylidenebis(2,6-dimethylphenol) (168), 4.4'-sec-butylidenediphenol (119), 4.4'-sec-butylidenebis(2-methylphenol) ( 142),
4,4'-cyclohexylidene diphenol (180
), 4,4'-cyclohexylidenebis(2-methylphenol) (184), salicylic acid (163), salicylic acid methalyl ester (74), salicylic acid phenacyl ester (110), 4-hydroxybenzoic acid methyl ester (131) ), 4-hydroxybenzoic acid ethyl ester (116), 4-hydroxybenzoic acid propyl ester (98), 4- and droxybenzoic acid isopropyl ester (86), 4-hydroxybenzoic acid butyl ester (71), 4-hydroxybenzoic acid butyl ester Benzoic acid isoamyl ester (50), 4-hydroxybenzoic acid phenyl ester (178), 4-hydroxybenzoic acid benzyl ester (111), 4-hydroxybenzoic acid cyclohexyl ester (119), 5-hydroxybenzoic acid (
200), 5-chlorsalicylic acid (172), 3-chlorsalicylic acid (178), thiosalicylic acid (164)
, 2-chloro-5-nitrobenzoic acid (165), 4-
Methoxyphenol (53), 2-hydroxybenzyl alcohol (87), 2,5-dimethylphenol (7
5), benzoic acid (122), orthotoluic acid (107)
), metatoluic acid (111), paratoluic acid (18
1), orthochlorobenzoic acid (142), metaoxybenzoic acid (200), 2,4-dihydroxyacetophenone (97), resorcinol monobenzoate (13)
5), 4-hydroxybenzophenone (133), 2
．． 4-dihydroxybenzophenone (144), 2-naphthoic acid (184), 1-hydroxy-2
-Naphthoic acid (195), 3,4-dihydroxybenzoic acid ethyl ester (128), 3,4-dihydroxybenzoic acid phenyl ester (189), 4-
Hydroxypropiophenone (150), salicyl salicylate (148), phthalic acid monobenzyl ester (
107), bis(4-hydroxyphenylmercapto)
Methane (55), 1,2-bis(4-hydroxyphenylmercapto)ethane (173).

1,3-bis(4-hydroxyphenylmercapto)propane (82), 1,4-bis(4-hydroxyphenylmercapto)butane (182), 1,5-bis(4-
Hydroxyphenylmercapto)pentane (98), 1
, 6-bis(4-hydroxyphenylmercapto)hexane (166), 1,3-bis(4-hydroxyphenylmercapto)acetone (74), 1,5-bis(4-
hydroxyphenylmercapto)-3-oxapentane (93), 1,7-bis(4-hydroxyphenylmercapto)-3,5-dioxahebutane (10g), 1,
8-bis(4-hydroxyphenylmercapto)-3.
6-Shioxaoctane (100), etc.

Furthermore, zinc chloride can be used as the color developer. This color developer containing zinc chloride provides a transferred colored image with excellent plasticity resistance and solvent resistance.

In the present invention, the oil absorption amount is 50mM/10 to the receptor layer of the receptor sheet and/or the transfer layer of the heat-sensitive transfer sheet.
It is preferable to contain a porous filler of 0 g or more (according to JIS K 5101 method), preferably 150 m Q /100 g or more. The porous filler to be contained in the receptor layer is 0.00 parts by weight per 1 part by weight of the color developer. 1 part by weight or more of O1 usually 0.05 to 10 parts by weight, preferably 0.1
-3 parts by weight. Moreover, when it is contained in the transfer layer, it is 0.01 to 1 part by weight, preferably 0.03 to 0.5 part by weight, per 1 part by weight of the color developer. Specific examples of porous fillers include silica, aluminum silicate,
Alumina, aluminum hydroxide, magnesium hydroxide,
Examples include inorganic and organic fine powders such as urea-formalin resin and styrene resin.

Further, for the transfer layer and receiving layer, a melting point of 200°C or less,
It is also possible to add thermofusible substances, preferably having a melting point below 150°C. The amount used is 0.1 to 50 parts by weight per 1 part by weight of the leuco dye. The thermofusible substances preferably used in the present invention include fatty acid amides, aromatic carboxylic acid amides, amides having a cyclohexyl-substituted amide group, cyclohexylcarboxylic acid amides, hydroxybenzoic acid phenyl esters,
Examples include benzoic acid phenyl ester, benzoyloxybenzoic acid ester, and various waxes or wax-like substances.

When providing a transfer layer and a receiving layer on each support, conventional binders are used, such as polyvinyl alcohol, methoxycellulose, hydroxyethylcellulose, carboxymethylcellulose, polyvinylpyrrolidone, polyacrylamide, and polyacrylic acid. ,
Water-soluble, organic solvent-soluble or aqueous emulsion-forming materials such as starch, gelatin, polystyrene, vinyl chloride-vinyl acetate copolymer, polybutyl methacrylate, etc. can be used, but especially in the case of the transfer layer,
A resin having a melting point or softening point of 50 to 130°C, such as polyethylene, polypropylene, polystyrene, petroleum resin, acrylic resin, vinyl chloride resin, vinyl acetate resin, vinylidene chloride resin.

polyvinyl alcohol, cellulose resin, polyamide,
It is preferable to use polyacetal, polycarbonate, polyester, fluororesin, silicone resin, natural rubber, chlorinated rubber, butadiene rubber, olefin rubber, phenol resin, urea resin, melamine resin, epoxy resin, polyimide, etc. as the binder.

The heat-sensitive transfer sheet having a heat-fusible colored ink layer as a transfer layer according to the present invention has a heat-fusible ink layer provided on the surface of a support 1, such as paper, synthetic paper, especially a plastic film, and
A thin film of a mixture of perfluoroalkyl acrylate resin and polyether-modified silicone oil is provided on the back side of the support. In this case, as the thermofusible colored ink, conventionally known inks are used, and usually those in which pigments are dispersed in a thermofusible substance are used. in this case,
Carnauba wax is a heat-melting substance.

Various waxes such as montan wax, paraffin wax, microcrystalline wax, beeswax, etc. or mixtures thereof, polyvinyl chloride, polyvinyl acetate, vinyl chloride/vinyl acetate copolymer, polyethylene, polypropylene, polyacetal, ethylene/vinyl acetate copolymer Polymer, polystyrene.

In addition to low molecular weight polystyrene, polyacrylate ester, polyamide, ethyl cellulose, epoxy resin, xylene resin, ketone resin, petroleum resin, rosin or its derivatives, coumaron indene resin, terpene resin, polyurethane resin, or styrene/butadiene rubber, polyvinyl butyral. .

Examples include thermofusible polymeric substances such as nitrile rubber, acrylic rubber, and ethylene/propylene rubber.

As the pigment (or coloring agent), a heat-fusible or heat-infusible one is used.For example, black pigments such as carbon black, triiron tetroxide, nigrosine base, cyanine blue, oil blue, alkali blue, etc. Other coloring pigments include Iozole Red, Rose Bengal, Crystal Violet Lactone, and Brilliant Green.

In addition, the ink may contain various commonly used auxiliary ingredients, such as animal and vegetable oils, mineral oils, fats and oils such as dioctyl phthalate, tricresyl phosphate, dibutyl phthalate, and lanolin, calcium carbonate, and magnesium carbonate. , diatomaceous earth, kaolin, white carbon,
Extender pigments such as silicic acid fine powder, as well as dipolyoxyethylene alkyl ether phosphoric acid, tripolyoxyethylene alkyl ether phosphoric acid, polyoxyethylene stearylamine, polyoxyethylene oleylamine, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether A nonionic surfactant such as polyoxyethylene stearyl ether can be added to the pigment as a dispersant.

The receiving sheet for the heat-sensitive transfer sheet having the thermofusible colored ink layer as a transfer layer is ordinary paper, synthetic paper, plastic film, or the like.

The heat-sensitive transfer sheet having a heat-sublimable or heat-vaporizable dye layer as a transfer layer in the present invention includes a heat-sublimable or heat-vaporizable dye layer provided on the surface of paper, synthetic paper, especially a plastic film as a support, A thin film of a mixture of perfluoroalkyl acrylate resin and polyether-modified silicone oil is provided on the back side of the support. In this case, conventionally known heat sublimable or heat vaporizable dyes are used for the dye layer, such as disperse dyes, oil-soluble dyes, acid dyes, mordant dyes, vat dyes, Examples include basic dyes. Furthermore, in addition to the dyes described above, a binder resin and an organic or inorganic filler can be added to the dye layer.

In this case, examples of the binder resin include polyester resins, acrylic resins such as polymethacrylic esters, and cellulose resins such as ethyl cellulose, hydroxyethyl cellulose, and methyl cellulose. This binder resin is preferably used in an amount of 0.1 to 2 parts by weight per 1 part by weight of the dye. Examples of fillers include organic fillers such as polystyrene resin particles and urea-formalin resin particles, as well as inorganic fillers such as aluminum hydroxide, calcium carbonate, silica, titanium, talc, and kaolin.

The receiving sheet for the heat-sensitive transfer sheet is ordinary paper, plastic film, or a surface-treated sheet thereof.

〔effect〕

The heat-sensitive transfer sheet of the present invention has the above-mentioned structure, and by providing a back coat layer made of a mixture of perfluoroalkyl acrylate resin and polyether-modified silicone oil on the side opposite to the transfer layer, During thermal transfer, it does not cause background smudges due to friction pressure coloring in non-image areas, and also does not cause sticking between the thermal head and the thermal transfer sheet. Also.

This layer made of a mixture of perfluoroalkyl acrylate resin and polyether-modified silicone oil also acts as a protective layer for the support and has the effect of preventing damage to the support.

The method of the heat-sensitive transfer sheet of the present invention is not particularly limited, and in addition to those having the above-mentioned leuco-based transfer layer or a transfer layer consisting of a heat-fusible colored ink layer, the heat-sensitive transfer sheet may be formed of a combination of reactive components as shown below. Included are thermal transfer sheets.

(a) Combination of long-chain aliphatic iron salts such as ferric stearate and ferric myristylate with phenols such as gallic acid and ammonium salicylate.

(b) Organic acid heavy metal salts such as nickel, cobalt, lead, copper, iron, mercury, and silver salts such as acetic acid, stearic acid, and palmitic acid, and alkaline earth metals such as calcium sulfide, strontium sulfide, and potassium sulfide. A combination with a sulfide or a combination of the organic acid heavy metal salt with an organic chelating agent such as S-diphenylcarbazide or diphenylcarbazone.

(c) Heavy metal sulfates such as silver, lead, mercury, thorium sulfates, Na-tetrathionate, sodium thiosulfate,
In combination with sulfur compounds such as thiourea.

(d) a ferric fatty acid salt such as ferric stearate;
Combinations with aromatic polyhydroxy compounds such as 3,4-dihydroxytetraphenylmethane.

(e) A combination of an organic metal salt such as silver oxalate or mercury oxalate and an organic polyhydroxy compound such as polyhydroxy alcohol, glycerin, or glycol.

(f) Combinations of organometallic salts such as silver behenate and silver stearate with aromatic organic reducing agents such as protocatechuic acid, spiroindane, and hydroquinone.

(g) A combination of an aliphatic ferric salt such as ferric pelargonic acid or ferric laurate and a thiocetyl-rubamide or isothiocetyl-rubamide derivative.

(h) A combination of an organic acid lead salt such as lead caproate, lead pelargonate, or lead behenate and a thiourea derivative such as ethylenethiourea or N-dodecylthiourea.

(S) A combination of a higher fatty acid heavy metal salt such as ferric stearate or copper stearate and zinc dialkyldithiocarboxylate.

(n) Those that form oxazine dyes, such as the combination of resorcinol and nitroso compounds.

(l) Combination of aromatic diazo compound and coupler.

(w) Combination of formazan compound and metal salt.

〔Example〕

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

Example 1 (1) Creation of transfer sheet A perfluoroalkyl acrylate resin solution (manufactured by Daikin Industries, Ltd., 10
% isopropyl alcohol solution, FS-107) 5
A mixed solution of 0 part of polyether-modified silicone oil (manufactured by Toray Silicone Co., Ltd., 5) 128PA) and 49.98 parts of isopropyl alcohol was applied and dried to form a perfluoroalkyl acrylate resin with a film thickness of 0.5 μm. and a polyether-modified silicone oil mixed layer was formed.

Then on the other side of this polyester film.

Silica fine particles (oil absorption 145m Q/100g)
1 part polyvinyl chloride (softening point 85°C)
2〃Methyl ethyl ketone 100
After dispersing the composition for 24 hours using a ball mill, it was coated and dried using a wire bar to give a coating weight of 6 g/
rI? A transfer sheet having a transfer layer of 1 was prepared.

(2) Preparation of receptor sheet 4-hydroxybenzoic acid n-butyl ester 20 parts Silica fine particles (oil absorption 200m Q /100g) 1
0 n polyvinyl alcohol 3
pt water
Using a ball mill, a composition consisting of 100%
After being dispersed for 4 hours, the mixture was coated on the surface of high-quality paper (basis weight 35 g/M) using a wire bar and dried to prepare a receptor sheet having a receptor layer with a coating weight of 5 g/M.

The receiving sheet and transfer sheet obtained as described above,
When the transfer layer and the receptor layer were stacked in contact with each other and 1 mJ of heating energy was applied from the back coat layer side of the transfer sheet using a thermal head, no sticking occurred between the thermal head and the transfer sheet. A clear black image with an image density of 1.20 was obtained. Further, in this case, no background staining occurred.

Example 2 Rose Bengal 18 parts Carnauba wax IIF paraffin wax (ap 97°C) was applied to the side without the back coat layer of a 6μ thick polyester film provided with only the back coat layer shown in Example 1. 23〃Engineered tyrene/vinyl acetate copolymer 3〃Kaolin
A hot-melt ink composition was prepared by uniformly kneading the composition of 7 for 2 hours at a temperature of 100°C using a three-roll mill, and this was applied to a transfer layer with an adhesion amount of 2.7 g/ci by a hot-melt coating method. A transfer sheet having the following was created.

Next, this transfer sheet was stacked on high-quality paper so that the transfer layer was in contact with the surface of the high-quality paper, and 1 mJ of heating energy was applied from the back coat layer side of the transfer sheet using a thermal head.

A clear image with an image density of 1.19 was obtained. Further, in this case, no background staining occurred.

Example 3 Another perfluoroalkyl acrylate resin solution (manufactured by Daikin Industries, Ltd.) was applied to a 6 μm thick polyester film.
50 parts of TI'-200 (10% isopropyl alcohol solution) and 0.02 parts of polyether-modified silicone oil (manufactured by Toray Silicone Co., Ltd., DCIIPA).

A mixed solution of 49.98 parts of isopropyl alcohol was applied and dried to provide a back coat layer of perfluoroalkyl acrylate resin and polyether-modified silicone oil having a thickness of 0.5 μm.

Then on the other side of this polyester film.

The transfer layer shown in Example 1 was formed to create a transfer sheet. The transfer layer of this transfer sheet was brought into contact with the receptor layer of the receptor sheet shown in Example 1, and 1 mJ of heating energy was applied from the resin layer side of the transfer sheet using a thermal head, resulting in a clear image with an image density of 1.24. A black image was obtained. Further, in this case, no background staining occurred.

Example 4 The transfer layer shown in Example 2 was formed on the side without the back coat layer of a 6 μm thick polyester film provided with only the back coat layer shown in Example 3, and the transfer sheet was applied. Created.

Next, the transfer layer of the transfer sheet was brought into contact with a high-quality paper serving as a receiving sheet, and 1 mJ of heating energy was applied from the back coat layer side of the transfer sheet using a thermal head, resulting in a clear image with an image density of 1.18. Obtained. Also,
In this case, no scumming occurred.

Example 5 Another perfluoroalkyl acrylate resin solution (manufactured by Daikin Industries, Ltd.,
50 parts of TP-210, 10% 1,1.1-trichloroethane solution) and polyether-modified silicone oil (
manufactured by Toray Silicone, 5H3746) 0.02 part,
1.1.1- A mixed solution of 49.98 parts of trichloroethane was applied and dried to form a back coat layer with a thickness of 0.5 μm.

Next, Example 1 was applied to the other side of this polyester film.
A transfer layer was formed as shown in , and a transfer sheet was prepared. The transfer layer of this transfer sheet was brought into contact with the receptor layer of the receptor sheet used in Example 1, and 1 mJ of heating energy was applied from the back coat layer side of the transfer sheet using a thermal head, resulting in a clear image with a density of 1.22. A great image was obtained. In this case, no scumming occurred.

Example 6 The transfer layer shown in Example 2 was formed on the side without the back coat layer of a 6 μm thick polyester film provided with only the back coat layer shown in Example 5, and the transfer sheet was applied. Created.

Next, the transfer layer of this transfer sheet was brought into contact with high-quality paper, and 1 mJ of heating energy was applied from the back coat layer side of the transfer sheet using a thermal head, resulting in an image density of 1
．． Fifteen clear images were obtained.

In this case, no scumming occurred. Comparative Example 1 The perfluoroalkyl acrylate resin solution shown in Example 1 was applied to a polyester film with a thickness of 6 μm and dried. A back coat layer consisting of

Next, the transfer layer shown in Example 1 was formed on the side of this film that did not have the back coat layer to create a transfer sheet. The transfer layer of this transfer sheet was brought into contact with the receptor layer of the receptor sheet shown in Example 1, and 1 mJ of heating energy was applied from the back coat layer side of the transfer sheet by a thermal head, resulting in an image with an image density of 1.25. However, in this case, black background stains occurred on the background of the non-image area.

Comparative Example 2 A polyester film having a thickness of 6 μm provided with only the perfluoroalkyl acrylate resin layer shown in Comparative Example 1 was provided on the side without the resin layer.

The transfer layer shown in Example 2 was formed to create a transfer sheet.

Next, the transfer layer of this transfer sheet was brought into contact with high-quality paper, and 1 mJ of heating energy was applied from the back coat layer side of the transfer sheet using a thermal head, resulting in an image density of 1.
No. 25 images were obtained, but in this case, black background stains occurred on the background of non-image areas.

Example 7 A polyester film provided with only the back coat layer shown in Example 1 was made to have a thickness of 9 μm, and a sublimable dye was applied to the side without the back coat layer.
6 parts (Kaya Set Black 922: manufactured by Nippon Kayaku) Hydroxypropyl cellulose
5u ethyl cellulose 5n
A transfer sheet with a dye adhesion of 0.6 g/mf was prepared using a gravure coater using a coating solution obtained by kneading a composition of 83 u of isopropyl alcohol.

Next, apply polyester resin onto the high-quality paper and let it dry.

It was coated at 5 g/m to prepare a receiving sheet.

The above transfer layer and the receiving sheet were stacked so that they were in contact with each other, and 2 mJ of heating energy was applied from the back coat layer side of the transfer sheet.
．． 85 images were obtained. in this case.

No staining occurred.

Comparative Example 3 KR-266 (
Shin-Etsu Chemical Co., Ltd.) 10 copies D 11 ()
la xylene
After uniformly dissolving the composition consisting of 491/, it was applied with a wire bar and heat treated at 150°C to form a film with a thickness of 0.
A 5 μm silicone resin varnish layer was provided.

Next, the transfer layer shown in Example 1 was formed on the back side of this silicone resin varnish layer to create a transfer sheet. Touch the surface of this transfer sheet.

When 1 mJ of heating energy was applied from the back coat layer side of the transfer sheet using a thermal head, the image density was 1.
．． No. 23 images were obtained, but in this case, black background stains occurred on the background of non-image areas.

Comparative Example 4 The transfer layer shown in Example 2 was formed on the back side of a 6 μl thick polyester film provided with only the silicone resin varnish layer shown in Comparative Example 3.

A transfer sheet was created.

The transfer layer of this transfer sheet is made of high quality paper (35g/rrr)
When 1 mJ of heating energy was applied from the back coat layer side of the transfer sheet using a thermal head, an image with an image intensity of 1.18 was obtained. Occurred.

Claims (1)

[Claims] (1) A heat-sensitive transfer sheet, characterized in that a heat-sensitive transfer layer is provided on the surface of a support, and a thin film of a mixture of perfluoroalkyl acrylate resin and polyether-modified silicone oil is provided on the back surface of the heat-sensitive transfer layer.