JPS6233682A - Thermal transfer sheet - 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] 〔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 methods, when the transfer sheet and the receiving sheet are overlapped and thermal printing is performed,
There is a drawback in that background smear (color develops in non-image areas) due to rubbing and color development occurs.

Conventionally, a heat-resistant protective layer is placed on the back side of the transfer sheet or transfer ribbon.
For example, it is known to provide a thin film of epoxy resin, melamine resin, phenol resin, fluororesin, polyimide resin, nitrocellulose, silicone oil, silicone varnish, or the like.

Although such a protective layer is effective in improving the sticking phenomenon, it is not effective in preventing background smudges caused by rubbing and pressure coloring in non-image areas during the above-mentioned thermal printing i2 recording.6 [Purpose] Book SUMMARY OF THE INVENTION An object of the present invention is to provide a heat-sensitive transfer sheet in which background smearing due to rubbing and pressure coloring in non-image areas is prevented when thermal transfer is performed by overlapping a transfer sheet with a receiving sheet.

[Drawing]

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 silicone rubber is provided on the back surface of the heat-sensitive transfer layer.

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, but in this case, a thin film of silicone rubber is provided on the back side of the thermal transfer sheet, so that the thermal printing can be performed easily. The rubbing pressure that occurs is absorbed by this rubber membrane. Therefore, even if the same transfer sheet is used many times, background smearing due to rubbing pressure coloring in non-image areas does not occur as seen in the prior art.

The silicone rubber used in the present invention is obtained by heating a long-chain organopolysiloxane whose main chain is difunctional and crosslinking and curing it through an addition reaction.

As mentioned above, the heat-sensitive transfer sheet with a thin film of silicone rubber on the back surface of the present invention does not cause background smearing due to pressure color development due to rubbing due to the effect of the silicone rubber during thermal transfer. Since the sticking phenomenon does not occur and the surface has excellent slip properties, when the transfer sheet is used as a ribbon for thermal transfer, the ribbon has good running properties.

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.

A thin film of silicone rubber can be formed on a support by applying a long-chain organopolysiloxane whose main chain is bifunctional together with a solvent and drying by heating. In this case, a crosslinking catalyst can also be used. It can also be carried out by laminating and adhering a pre-formed silicone rubber thin film to a support. In this case, the thickness of the silicone rubber thin film is 5 μm or less, preferably 0.0 μm or less, because if it is too thin, the heat resistance will be insufficient, and if it is too thick, the heat sensitivity will be reduced.
The thickness is preferably 1 to 5 μm, particularly 0.03 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 in the present invention uses a support 1, for example, a piece of paper.

A transfer layer containing a leuco dye is provided on the surface of synthetic paper, especially a plastic film, and a thin film of silicone rubber is provided on the back surface of the support. 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(ρ-dimethylaminophenyl)-6-dimethylaminophthalide (also known as crystal violet lactone), 3.3-bis(P- dimethylaminophenyl)-6-dibutylaminophenyl, 3.3-bis(P-dimethylaminophenyl)-6-chlorophthalide, 3.3-bis(p-dibutylaminophenyl)phthalide.

3-cyclohexylamino-6-chlorofluorane, 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-ρ-toly-N-ethylamino)-6-methyl-7-anilinofluorane, 3-pyrrolidino-6-methyl-7-anilinofluorane.

2- (N-(3'-trifluoromethylphenyl)
amino)-6-dinithylaminofluorane, 2-(3,
6-bis(diethylamino)-9-(o-chloroanilino)xantylbenzoic acid lactam), 3-diethylamino-6-methyl-7-(m-trichloromethylanilino)fluoran, 3-diethylamino-7-(0-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'- 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 applied to the support.
Usually 0.3-30g/m2. Preferably 0.5-20g
/l112.

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-tert,-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 (1
66), 4-hersioctylcatechol (IO2)
), 2,2'-dihydroxydiphenyl (103),
4,4'-methylenebisphenol (160), 2,
2'-methylenebis(4-chlorophenol) (16
4), 2,2'-methylenebis(4-methyl-6-t
ert-butylphenol) (125), 4,4'-
Isopropylidenediphenol (156), 4,4'
-isopropylidene bis(2-chlorophenol) (9
0), 4,4'-inpropylidene bis(2,6-dibromophenol) (172), 4,4'-isopropylidene bis(2-terL-butylphenol) (H
o), 4,4'-isopropylidene bis(2-methylphenol) (136), 4,4'-isopropylidene bis(2,6-dimethylphenol) (168), 4
．． 4'-5ec-butylidene diphenol (119)
, 4,4'-5ec-butylidene bis(2-methylphenol) (142), 4,4'-cyclohexylidene diphenol (180), 4,4'-cyclohexylidene bis(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-hydroxybenzoic acid isopropyl ester (86), 4-
Hydroxybenzoic acid butyl ester (71), 4-hydroxybenzoic acid isoamyl ester (50), 4-hydroxybenzoic acid phenyl ester (178), 4-hydroxybenzoic acid benzyl ester (111), 4-hydroxybenzoic acid cyclohexyl ester ( 119), 5
-Hydroxysalicylic 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 (75), benzoin'v (122), orthotoluic acid (107), metatoluic acid (111)
, paratoluic acid (181), orthochlorobenzoic acid (
142), metaoxybenzoic acid (200), 2.4-
Dihydroxyacetophenone (97).

Resorcinol monobenzoate (135), 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 (14)
8), 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
- human oxyphenylmercapto)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 (108), 1,8-bis(4-hydroxyphenylmercapto)-3,6-cy Oxaoctane (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 for the receptor layer of the receptor sheet and/or the transfer layer of the thermal transfer sheet is 50 m Q /
It is preferable to contain a porous filler of 100 g or more (according to JIS K 5101 method), preferably 150+o 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.
0.01 parts by weight or more, usually from 0.05 to 10 parts by weight, preferably from 0.1 to 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 inorganic and organic fine powders such as silica, aluminum silicate, alumina, aluminum hydroxide, magnesium hydroxide, urea-formalin resin, and styrene resin.

Further, a thermofusible substance having a melting point of 200° C. or lower, preferably 150° C. or lower can be added to the transfer layer or receptor layer. 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 ester, benzoic acid phenyl ester, benzoyl Examples include oxybenzoic acid esters 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,
Resins 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, polyacetal, polycarbonate , polyester, fluororesin, silicone resin, natural rubber, chlorinated rubber, butadiene rubber, olefin rubber, phenol resin, urea resin, melamine resin, epoxy resin, polyimide, etc. are preferably used 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 such as paper, synthetic paper, especially a plastic film,
A thin film of silicone rubber 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, the heat-melting substances include various waxes such as carnauba wax, montan wax, paraffin wax, microcrystalline wax, and beeswax, or mixtures thereof, polyvinyl chloride, polyvinyl acetate, and vinyl chloride/vinyl acetate. Polymer, polyethylene, polypropylene, polyacetal,
In addition to ethylene/vinyl acetate copolymer, polystyrene, low molecular weight polystyrene, polyacrylic acid ester, polyamide, ethyl cellulose, epoxy resin, xylene resin, ketone resin, 15 oil resins, rosin or its derivatives,
Examples include coumaron indene resin, terpene resin, polyurethane resin, or thermofusible polymeric substances such as styrene/butadiene rubber, polyvinyl butyral, 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.

Further, 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 and tripolyoxyethylene alkyl ether phosphoric acid.

Nonionic surfactants such as polyoxyethylene stearylamine, polyoxyethylene oleylamine, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, and 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 silicone rubber 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. Also,
In addition to the dye 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 acid esters, and cellulose resins such as ethyl cellulose, hydroxyethyl cellulose, and methyl cellulose.

This binder resin is 0.1 to 2 parts by weight per 1 part by weight of dye.
Preferably, it is used in parts by weight. Examples of the filler 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 thermal transfer sheet of the present invention has the above-mentioned structure, and by providing a silicone rubber layer on the surface opposite to the transfer layer, background smearing due to pressure color development in the rubbing center of the non-image area is prevented during thermal transfer. It does not occur. Further, this silicone rubber layer does not cause sticking to the thermal head, and also functions as a protective layer for the support, thereby 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 with a thiocetylcarbamide or an inthiocetylcarbamide 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.6 Example 1 (1) Creation of transfer sheet A polyester film with a thickness of 6 μm was coated with SD 7226.
Natsume 1 (manufactured by Toray Silicone) 10 parts Long-chain organopolysiloxane SRX whose IL main chain is bifunctional 2
12” ” ()--manufactured by Le Silicone Co., Ltd.) 0.1
After uniformly dissolving a composition consisting of #g12 crosslinking catalyst toluene 49.97/, it was coated with a wire bar and heated at 120°C for 2 minutes to give a film thickness of 0.5 μm3-N.
Composition consisting of: -Methyl-N-cyclohexylamino-6-methyl-foofunilinofluorane 10 parts Silica fine particles (oil absorption 145mQ/100g) 1 tt polyvinyl chloride (softening point 85°C) 2 methyl ethyl ketone 1007/ After dispersing for 24 hours using a ball mill, apply using a wire bar, dry and adhere ii 6g/rrr
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 200+oQ 1100g)
10n polyvinyl alcohol 3
n water
100// was dispersed for 24 hours using a ball mill, and then applied to the surface of high-quality paper (basis weight 35 g/proof) using a wire bar and dried to obtain a coating weight of 5 g//.
A receptor sheet having a receptor layer of rrr was prepared.

The receiving sheet and transfer sheet obtained as described above are
The transfer layer and the receptor layer were stacked so that they were in contact with each other, and when 1 mJ of heating energy was applied from the silicone rubber layer side of the transfer sheet using a thermal head, a clear black image with an image density of 1.23 was obtained. Ta. Furthermore, there was no background staining at all during this thermal transfer.

Example 2 Rose Bengal 18 parts Carnauba wax 1 Qrt paraffin wax (mp! 17 ℃) 23n polyethylene/vinyl acetate copolymer 3N A hot-melt ink composition was prepared by uniformly kneading for 2 hours, and this was coated with a hot-melt coating method to give an adhesion amount of 2.7 g/c+.
A transfer sheet having a # transfer layer was prepared.

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 a thermal head was used to apply 1 mJ from the silicone rubber layer side of the transfer sheet.
A clear image with an image density of 1.20 was obtained by applying heating energy of . Further, there was no scuffing during this thermal transfer.

Example 3 6μm thick polyester film.

So 7229'' (manufactured by Toray Silicone Co., Ltd.) 10 parts Long-chain organopolysiloxane SRX 212''' (manufactured by Toray Silicone Co., Ltd.) whose main chain is difunctional 0.1 u Jujube 2 crosslinking catalyst toluene 49. After the composition consisting of #9 was uniformly dissolved, it was coated with a wire bar and heat treated at 120°C for 2 minutes to form a silicone rubber layer with a thickness of 0.5 μm.

Next, the transfer layer shown in Example 1 was formed on the other side of this polyester film 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 silicone rubber layer side of the transfer sheet using a thermal head, resulting in an image density of 1.20. A clear black image was obtained.

Also, in this case, there was no scuffing.

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

Next, the transfer layer of the transfer sheet is brought into contact with the high-quality paper serving as the receiving sheet, and from the silicone rubber layer side of the transfer sheet,
When heating energy of 11 IIJ was applied using a thermal head, a clear image with an image density of 1.18 was obtained. Also, in this case, there was no scuffing.

Example 5 KS 841” was applied to a 6 μm thick polyester film.
(Manufactured by Shin-Etsu Silicone Co., Ltd.) 10 parts I11 Long-chain organopolysiloxane PL-8'' whose main chain is difunctional After dissolving it in
A glue cone rubber layer was provided.

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 silicone rubber layer side of the transfer sheet using a thermal head, resulting in an image density of 1.25. A clear black image was obtained.

Further, in this case, there was no background stain.

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

Next, when the transfer layer of this transfer sheet was brought into contact with high-quality paper and heating energy of IIIJ was applied from the silicone rubber layer side of the transfer sheet using a thermal head, a clear image with an image density of 1.15 was obtained. Ta. Also, in this case, there was no scuffing.

Example 7 KS-843 was applied to a 6 μm thick polyester film.
Fuki 1 (manufactured by Shin-Etsu Silicone Co., Ltd.) 10 parts l111
After uniformly dissolving a composition consisting of long-chain organopolysiloxane PL-8 East 2 whose main chain is difunctional, 0.1 part East 2 crosslinking catalyst toluene 49.97, this was applied with a wire bar, Heat treated at 120℃ for 2 minutes to obtain a film thickness of 0.5μ-
A silicone rubber layer was provided.

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 silicone rubber layer side of the transfer sheet using a thermal head, resulting in an image density of 1.22. A clear black image was obtained.

Further, in this case, there was no background stain.

Example 8 The transfer layer shown in Example 2 was formed on the side without the rubber layer of the 6 μm thick polyester film provided with only the silicone rubber layer shown in Example 7, and the transfer sheet was applied. Created.

Next, the transfer layer of this transfer sheet is brought into contact with high-quality paper,
From the silicone rubber layer side of the transfer sheet.

When 1 mJ of heating energy was applied using a thermal head, a clear image with an image density of 1.17 was obtained. Further, in this case, there was no background stain.

Comparative Example 1 Polyfluorocarbon coating agent (commercial product as fluorine-based mold release agent,
Lumiflon LF200 and Asahi Glass@m> were applied using a wire bar and heat treated at 120°C for 10 minutes, resulting in a film thickness of 0.5
A μ-thick polyfluorocarbon layer was provided.

Next, the transfer layer shown in Example 1 was formed on the side of this film that did not have the polyfluorocarbon layer,
A transfer sheet was created. The transfer layer of this transfer sheet was brought into contact with the receptor layer of the receptor sheet used in Example 1, and heating energy of 1+J was applied by a thermal head from the polyfluorocarbon layer side of the transfer sheet, resulting in an image with an image density of 1.20. However, in this case, black background stains occurred on the background of the non-image area.

Comparative Example 2 The transfer layer shown in Example 2 was formed on the side without the polyfluorocarbon layer of the polyester film with a thickness of 6 μm provided with only the polyfluorocarbon layer shown in Comparative Example 1, and a transfer sheet was prepared. It was created.

Next, the transfer layer of this transfer sheet is brought into contact with high-quality paper,
When 1 mJ of heating energy was applied from the polyfluorocarbon layer side of the transfer sheet using a thermal head, 1
An image with an image source degree of 1.15 was obtained, but in this case, background smear occurred on the background of the non-image area.

Comparative Example 3 KR-266 (
After uniformly dissolving a composition consisting of 49n of xylene (Shin-Etsu Chemical Jun Co., Ltd.) 10 parts D-11 () 1", this was applied with a wire bar and heat treated at 150°C to form a silicone film with a thickness of 0.5 μm. A resin varnish layer was provided.

Next, the transfer layer shown in Example 1 was formed on the side of this film that did not have the silicone resin varnish layer,
A transfer sheet was created. When the transfer layer of this transfer sheet and the receiving layer of the receiving sheet shown in Example 1 were brought into contact and 1 mJ of heating energy was applied from the varnish layer side of the transfer sheet using a thermal head, an image with an image density of 1.23 was obtained. However, in this case, black background stains occurred on the background of the non-image area.

Comparative Example 4 The transfer layer shown in Example 2 was formed on the side without the varnish layer of the 6 μm thick polyester film provided with only the silicone resin varnish layer shown in Comparative Example 3 to create a transfer sheet. did.

Next, the transfer layer of this transfer sheet was brought into contact with high-quality paper, and a thermal head was applied to the varnish layer side of the transfer sheet for 1 mJ.
where heating energy is applied.

An image with an image density of 1.18 was obtained, but in this case, background stains occurred on the background of non-image areas.

Example 9 A polyester film provided with the fishing corn rubber layer shown in Example 1 was made to have a thickness of 9 μm, and 6 parts by weight of a sublimable dye (Kayascent Black 922) was added to the side without the rubber layer. : Nippon Kayaku 111) Hydroxypropyl cellulose 5 u ethyl cellulose
5 Isopropyl alcohol
A transfer sheet having a dye adhesion amount of 0.6 g/rrr was prepared from the kneaded product of the composition No. 83 using a gravure coater.

Next, apply polyester resin on high-quality paper, dry it, and then
g/n (applied as desired to create a receptor sheet.

When the transfer layer and the receiving sheet were stacked so that they were in contact with each other on the polyester resin coated side, and 2 mJ of heating energy was applied from the silicone rubber layer side of the transfer sheet, an image with an image density of 0.85 was obtained. Also.

In this case, there was no background stain.

Comparative Example 5 A transfer sheet was prepared by using a polyester film provided with the polyfluorocarbon layer shown in Comparative Example 1 to a thickness of 9 μm and forming the transfer layer shown in Example 9 on the side without the polyfluorocarbon layer. .

When the above transfer layer and the resin-coated side of the receptor sheet shown in Example 9 were placed in contact with each other, and 2 mJ of heating energy was applied from the polyfluorocarbon layer side of the transfer sheet,
Although an image with an image density of 0.80 was obtained, black background stains occurred in non-image areas.

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 silicone rubber is provided on the back surface of the heat-sensitive transfer layer.