JPS63227384A - Thermal transfer film - Google Patents

Abstract

PURPOSE:To obtain a thermal transfer film suitable for a thermal transfer ribbon which is free of sticking, free of changes in bleeding condition of additives with time and free of evaporation of the additives in coating and drying steps, by providing a layer obtained by mixing a swellable inorganic laminar silicate, a water-soluble or water-dispersible swelling agent and a water- dispersible resin in specified ratios on one side of a plastic film, and providing a thermal transfer layer on the other side. CONSTITUTION:A layer obtained by using a mixture of (a) a swellable inorganic laminar silicate, (b) a water-soluble or water-dispersible swelling agent and/or a surfactant and (c) at least one water-soluble or water-dispersible resin selected from a thermosetting polyester, a thermosetting acrylic resin and an organometallic compound capable of condensation polymerization, with the weight ratio of (a)/(b) being 1/10<3>-2/1, the weight ratio (a)/(c) being 1/20-50/1 and the weight ratio (c)/(b) being 1/100-5/1, is provided on one side of a plastic film, and a thermal transfer layer is provided on the other side. A thermal transfer film thus obtained is markedly raised in oil evaporation temperature, and is enhanced in adhesion of the thermal transfer layer to a base or a paper.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a heat-sensitive transfer film, and more particularly to a heat-sensitive transfer film suitable for use as a heat-sensitive transfer ribbon.

[Prior Art] Conventionally, in a heat-sensitive transfer film that has a transfer ink layer that melts or sublimates when heated on one side of a base material made of a plastic film, a vapor layer is provided on the other side of the base material. Some of the known materials include those with a heat-resistant protective layer of thermosetting resin, and those with silicone oil, ethylene glycol, and surfactants added to thermosetting or heat-resistant resin.

[Problems to be solved by the invention]However, in the case of a metal vapor deposition layer, the metal vapor deposition is a batch process, so the cost is inevitably high. , the disadvantage is that resolution deteriorates due to increased heat diffusion. On the other hand, those coated with a thermosetting resin or a heat-resistant resin do not cause sticking, but have the disadvantage that their slipperiness deteriorates to varying degrees as the temperature rises. Attempts have been made to add inorganic lubricants to improve this drawback, but in this case, the surface becomes too rough, resulting in poor adhesion to the heating head or poor heat transfer efficiency. There were drawbacks.

On the other hand, when silicone oil, ethylene glycol, or surfactants are added to thermosetting or heat-resistant resins, the additives volatilize during coating, contaminating the dryer, and may deteriorate over time or under coating drying conditions. There was a drawback that the state in which the additive oozed out onto the surface varied greatly depending on the difference.

The object of the present invention is to provide a ribbon that does not have the above-mentioned drawbacks, that is, a ribbon that is suitable for thermal transfer ribbons that does not cause sticking, does not cause changes in the oozing state of additives over time, and does not volatilize additives during coating and drying processes. The purpose of the present invention is to provide a film for thermal transfer.

[Means for Solving the Problems] The present invention provides (a) a swellable inorganic layered silicate, (b) a water-soluble or water-dispersible swelling agent and/or a surfactant, and (c) a thermosetting polyester, a thermosetting It consists of one or more water-soluble or water-dispersible resins selected from curable acrylics and organometallic compounds capable of condensation polymerization, and the weight ratio of (a) and (b) is 1/103 to 2/
1, and the weight ratio (a/c) of (a) and (c) is 1/2
0 to 50/1, the weight ratio (c/b) of (c) and (b) is 1
/100 to 5/1 on one surface of the plastic film, and a thermal transfer layer on the other surface. .

As the base plastic film in the thermal transfer film of the present invention, any known plastic film may be used as appropriate. Typical examples include polyester film, triacetyl cellulose film, cellophane film,
Examples include polyamide film, polyimide film, polyphenylene sulfide film, polyetherimide film, polyether sulfone film, aromatic polyamide film, polysulfone film, and polyolefin film. However, from the viewpoint of cost and heat resistance, it is particularly preferable to use polyester film, polycarbonate film, and polyphenylene sulfide film. The thickness of the plastic film is not particularly limited, but is usually 0.5 μm or more and 40 μm or less, preferably 1 μm or more and 8 μm or less.

When using a composite film, the number of layers or the method is not particularly limited, but it is possible to composite it by a composite extrusion method, an extrusion lamination method on a base film, a lamination method using various adhesives, etc. Normal.

The melting or sublimating transfer ink constituting the transfer ink layer provided on one surface of the base plastic film is also not particularly limited, and any known one can be used as appropriate. The main ingredients of the hot-melt ink are (1) a wax with an appropriate melting point such as paraffin wax, microcrystalline wax, or carnauba wax, (2) a pigment, and (3) a softener such as oil. Typical examples include those to which various additives are added depending on the requirements. Typical pigments used in this case include organic pigments such as azo pigments, phthalocyanine pigments, dyeing lakes, condensed polycyclic pigments, nitrone pigments, and alizarin lakes. On the other hand, sublimable ink mainly consists of (1) cellulose-based water-soluble acrylic such as hydroxyethyl cellulose, polyvinyl alcohol, or polyamide resin, (2) sublimable dyes of yellow, magenta, and cyan, with various additions as necessary. Typical examples include those with added agents. Representative examples of sublimable dyes include disperse dyes, basic dyes, and oil-soluble dyes. The thickness is not particularly limited, but is usually 0.1 to 15 μm, preferably 1 to 6 μm.
It is m.

The essence of the present invention is to use a swellable inorganic layered silicate as an inorganic coating component. Here, the term "swellable" refers to an inorganic layered silicate that has the property of ``swelling'' by coordinating water between its layers. Its essence is that it exists in the form of fine particles formed by interlayer separation.

The swellable inorganic layered silicate (a) used in the present invention is structurally SiO4 and has a theoretical tetrahedral Si to O ratio of 2:
The phyllosilicate of No. 5 has a crystal structure in which the crystal unit cell is repeated in the thickness direction, and a typical example thereof can be represented by the following chemical formula.

Wo, yNt+ X +, rNaz C6; s, qy
4.5QIo) Z 1. aN! 2 where W: interlayer ion, one or more cationic ions X: ion at octahedral position, M02+ or I't1
Part of 2nd section Ll , Fe , N1 , Mn2+, 2+
- Ions substituted with at least one type of ion selected from the group 2+ 3+ A41 and Fe3''b'.

0: Oxygen Z: One or two ions selected from "- or OH-" Furthermore, in the present invention, 3 H4+ at the above-mentioned tetrahedral position is Ge3+ 4+ or a part of these is AM, Fe3", B3''W may be replaced, and the swellable inorganic layered silicate referred to in the present invention includes these as well.

Specific examples of these include natural products such as montmorillonite and vermiculite, and viscosity-based and mica-based minerals such as tetrasilisic mica, duolite, and hectorite, which are synthesized by melting or hydrothermally and have the above general formula. There is.

Among these, synthetic materials are particularly preferred because they contain few impurities and have a uniform composition, resulting in uniform crystals.Among these, synthetic materials are particularly preferred because they have excellent crystal flatness and large crystal size. al Nx+o-+ M3 z-9-Kyi2-
X L+ K (S 1ttx*, oOro) F r
,t,z,.

or Wx-ai mn11. I Mll y, a-x ~1
2-x Ltx (S; y, sy+, oOro) (O
H)+, t-vyb (where x=0.8 to 1.2) is preferred. Further, the interlayer ion W is not particularly limited as long as it is one or more cationic ions, but
Examples of cationic ions include Li+, Na+, 50
The following alkyl groups, R2 to R4 are hydrogen or have 1 to 1 carbon atoms
0 alkyl group>, K 1 or MO, Ca, B
Alkaline earth metals such as a and AI20++ can be mentioned. Among them, since the dispersibility in water is particularly good, it is preferable that the amount of \R4 is 40% or more, preferably 60% or more, and more preferably 80% or more and 90% or less.

The size of the swellable inorganic layered silicate is not particularly limited, but the average particle size measured by a sedimentation method is 0.05 μm to 1.0 μm.
A thickness in the range of 5 μm, preferably 0.1 μm to 8 μm, more preferably 0.15 μm to 3 μm is preferable because a uniform layer can be obtained. Also, 50% of all particles
Preferably 80%, more preferably 90% of the thickness is 80%.
0 Å or less, preferably 400 Å or less, more preferably 1
When it is 00 Å or less, the surface of the coating layer is smooth and the product becomes more compact, which is more preferable.

The thickness herein refers to the thickness of inorganic particles present in the cross section of the coating layer of the coating film.

The organometallic compound used in the present invention is an organic compound having at least one type of chemical bond such as a metal-carbon bond, a metal alcoholade bond, a metal acylate bond, a metal chelate bond, etc. A compound that can easily form a polycondensate after hydrolysis in the presence of a catalyst or a catalyst. Examples of the metal include aluminum, silicon, titanium, chromium, zirconium, tin, etc., but are not necessarily limited to compounds of these metals. It is desirable to increase the adhesion between the coating film and the polyester film, and the above-mentioned compounds are preferably organic silane compounds and organic titanium compounds.

Examples of organic silane compounds include tetraalkoxysilane,
Examples include trialkoxysilanes and dialkoxysilanes represented by the following formula (1) or <2), and compounds represented by the following formula (3).

R1-3i-(OR3)3 (1) (In the above formula, R1 and R2 are alkyl groups, cycloalkyl groups, vinyl groups, alkenyl groups, aryl groups, etc., and some of the hydrogen atoms of these groups are replaced with halogen etc. a group substituted with other atoms,
Indicates a group substituted with a reactive functional group such as a hydroxyl group, carboxyl group, epoxy group, epoxycyclohexyl group, glycidoxy group, methacryloxy group, amino group, diamino group, ureido group, or mercapto group. R3 represents an alkyl group such as a methyl group or an ethyl group, or a substituted alkyl group such as a methoxyethyl group. )(R4) -3i
-(R3) <3>4-n
n (in the formula, R4 represents an alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, an alkoxy group such as a methoxy group, an ethoxy group, a vinyl group, a phenyl group, a methacryloxy group, a methacryloxypropyl group, etc.) ,
R3 is a halogen atom, a tert-butylperoxy group,
Indicates a group such as an acyl group or an isocyanate group. n is a number from 1 to 4. ) The number of carbon atoms in the alkyl group, cycloalkyl group, alkenyl group and alkoxy group is preferably 10 or less.

Specific examples of these compounds include tetraethoxysilane, tetrabutoxysilane, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, methyltripropoxysilane, phenyltrimethoxysilane, dimethyldimethoxysilane, and vinyltriethoxysilane. Silane, vinyltris (β-methoxyethoxy)
Silane, γ-chloropropyltrimethoxysilane, β-
(3,4-epoxycyclohexyl)ethyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyljethoxysilane, T-methacryloxypropyltrimethoxysilane, γ
-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-β-(aminoethyl)-
γ-7minopropyltrimethoxysilane, β-(amineethyl)-γ-aminopropylmethyldimethoxysilane, γ-ureidopropyltriethoxysilane, r-mercaptopropyltrimethoxysilane, diethyldichlorosilane, n-propyltrichlorosilane , tetraisocyanatesilane, phenyltriincyanatesilane, triisocyanatemethoxysilane, etc.
It is not limited to these.

Examples of organic titanium compounds include titanium esters, titanium acylates, and titanium chelate compounds. Specific examples include tetraisopropoxy titanium,
Tetrabutoxytitanium, Tetrakis(2-ethylhexyloxy)titanium, Diisopropoxybis(acetylacetonato)titanium, Tetrakis(2-ethylhexanediorad)titanium, Isopropoxytitanium tristearate, Isopropoxytitanium tri(dioctyl phosphate) ), but are not limited to these.

In the present invention, one type or a mixture of two or more of these organometallic compounds can be used as is, partially hydrolyzed, or as a hydrolyzed low polymer.

Thermosetting polyester in the present invention is a polyester copolymer that is crosslinked by heating, ultraviolet rays, electron beams, etc. by adding a known crosslinking agent that crosslinks polyester by reacting with carboxyl groups and hydroxyl groups at the terminals of polyester. , and a polyester copolymer in which a reactive group is introduced and self-crosslinked either alone or by heating using a crosslinking catalyst.

The polyester copolymer crosslinked by blending a crosslinking agent is a normal polyester copolymer having a carboxyl group or a hydroxyl group at the terminal, and is particularly limited to one obtained by polycondensing a dicarboxylic acid component and a glycol component. It's not a thing.

The dicarboxylic acid component includes aromatic, aliphatic, and alicyclic dicarboxylic acids, such as terephthalic acid, isophthalic acid, orthophthalic acid, 2,6-naphthalenedicarboxylic acid,
Adipic acid, sebacic acid, succinic acid, glutaric acid, 1,
3-cyclopentanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, dodecanedicarboxylic acid, azelaic acid, etc. can be used. Further, in order to make the polyester copolymer water-soluble or to impart water-based dispersibility, a dicarboxylic acid containing a sulfonic acid metal group can also be used as a copolymerization component. Examples include metal salts of sulfoterephthalic acid, 5-sulfoisophthalic acid, 4-sulfoisophthalic acid, 4-sulfonaphthalene-2,7-dicarboxylic acid, and 5[4-sulfophenoxy]isophthalic acid.

The glycol component to be reacted with the dicarboxylic acid mentioned above is an aliphatic glycol having 2 to 8 carbon atoms, or an aliphatic glycol having 6 carbon atoms.
~12 alicyclic glycols, specific examples include ethylene glycol, 1,2-propylene glycol, 1,
3-propanediol, 1,4-butanediol, neopentyl glycol, 1,6-hex4nanediol J,
These include 1,2-cyclohexane dimetatool, 1,3-cyclohexane dimetatool, 1,4-cyclohexane dimetatool, xylylene glycol, diethylene glycol, triethylene glycol, and the like. Polyethylene glycol, polypropylene glycol, or polytetramethylene glycol may be used as part of these glycol components.

The polyester copolymer obtained from the dicarboxylic acid and glycol components is used after being dissolved or dispersed in water, an organic solvent, a mixed solvent of water and an organic solvent, or the like.

These copolymerized polyesters preferably have many terminal groups from the viewpoint of crosslinkability, and have a hydroxyl value of 3 to 200 mgKOH.
/(l polymer, preferably 5-100 maKOH/g
It is a polymer. When the hydroxyl value is 3 or less, reactivity is poor, and when it exceeds 200, the toughness of the coating film is poor. In addition, the glass transition point of copolymerized polyester is 10 to 90°C,
Preferably, it exhibits suitable stick resistance when kept at 40 to 70°C.

The crosslinking agent for crosslinking the polyester copolymer is not particularly limited as long as it reacts with the terminal carboxyl group or hydroxyl group to make it three-dimensional, but typical examples include methylolated or alkylolated urea, and melamine. system,
Examples include acrylamide-based resins, polyamide-based resins, epoxy compounds, isocyanate compounds, and aziridine compounds. Among these, methylolated melamine and isocyanate compounds are preferably used in terms of adhesion to the substrate and stick prevention properties. The amount of crosslinking agent to be added is appropriately selected depending on the type of crosslinking agent, but it is usually preferable to add it to both ends of the polyester copolymer in an equivalent amount.
30 parts, preferably 5 to 20 parts.

What is a polyester copolymer with a reactive group introduced?The following compounds having functional groups such as a reactive functional group, a self-crosslinking functional group, or a hydrophilic group are introduced into a polyester copolymer. This is what I did. Examples of compounds having a carboxyl group or a salt thereof, or an acid anhydride group include acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, and crotonic acid. Examples of compounds having an amide group or an alkylolated amide group include acrylamide, methacrylamide, N-methylmethacrylamide, methylolated acrylamide, methylolated methacrylamide, ureido vinyl ether, β-ureido isobutyl vinyl ether, ureido ethyl acrylate, etc. It will be done. Compounds with hydroxyl groups include β-hydroxyethyl acrylate, β-hydroxyethyl methacrylate, β-hydroxypropyl acrylate, β-hydroxypropyl methacrylate,
Examples include -hydroxy vinyl ether, 5-hydroxypentyl vinyl ether, 6-hydroxyhexyl vinyl ether, polyethylene glycol monoacrylate, polyethylene glycol monomethacrylate, polypropylene glycol monoacrylate, and polypropylene glycol monomethacrylate.

Examples of the compound having an epoxy group include glycidyl acrylate and glycidyl methacrylate.

Among these reactive groups, grafted products of acrylic acid and methylolated acrylamide are preferred in terms of adhesion to the substrate, stick resistance, and the like.

After coating, the polyester copolymer having these reactive groups can be crosslinked by heating, etc., but it is more preferable to use a crosslinking catalyst in combination because the crosslinking will proceed further. As the crosslinking catalyst, ammonium chloride, ammonium nitrate, citric acid, oxalic acid, p-toluenesulfonic acid, dialkyltin complex, etc. can be used. The amount of crosslinking catalyst added is 0.5 to 5 parts of the polyester copolymer in terms of solid content;
Preferably it is 1 to 3 parts. Polyester copolymers to which a crosslinking agent has been added and polyester copolymers to which reactive groups have been introduced are crosslinked by heating, ultraviolet rays, electron beams, etc. after being applied to a substrate, but heating is usually the most common method.

Heating is not particularly limited as long as it can crosslink to the extent that the object of the present invention can be achieved, but it is usually at 60 to 150°C for 5 seconds to 5 minutes, preferably at 80 to 130°C for 10 seconds to 2 minutes. .

However, when the base film is a biaxially stretched polyester film, it is more preferable because drying and heat treatment can be performed after coating during the manufacturing process, making it possible to crosslink at a higher temperature for a shorter time. .

The thermosetting acrylic used in the present invention includes hydroxyl,
Acrylates, methacrylates, or their copolymers and blends having crosslinkable functional groups such as carboxyl, amide, amine, nitrile, and epoxy can be used as epoxy resins, aziridinyl resins, alkyd resins, amines,
Melamine, diazine, urea, cyclic ethylene urea, cyclic propylene urea, alkyl melamine, aryl melamine,
Examples include those crosslinked with benzo-guanamine, guanamine, aldehyde, isocyanate, and the like.

The water-soluble or water-dispersible lubricants and surfactants used in the present invention include known anionic, cationic,
Examples include amphoteric or nonionic surfactants, fluorine-based surfactants, organic carboxylic acids and their derivatives, higher aliphatic alcohols, paraffins, waxes, organopolysiloxanes, and the like.

However, specific examples of these include higher alkylamines and ammonium salts obtained from them, cationic surfactants such as neutralized esters of ethanolamine and higher fatty acids, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, etc. Nonionic surfactant with hydroxyl group, lauryl alcohol,
Examples include higher aliphatic alcohols such as myristyl alcohol, cetyl alcohol, stearyl alcohol, and behenyl alcohol.

Further, representative examples of the silicone oil in the present invention are represented by the following general formulas (A) to (C).

II R" R...(c) [However, X, Y, and Z are integers of 1 to 5000, R is an alkyl group or hydroxyl group having 1 to 100 carbon atoms, and R' is alkylene having 1 to 10 carbon atoms. group, a phenylene group, a cyclohexylene group, an ether group, Ru is hydrogen, an alkyl group having 1 to 100 carbon atoms, an epoxy group, an amine group,
carboxyl group, phenyl group, hydroxyl group, mercapto group,
R represents a group selected from a polyoxylene alkyl group and a halogen-containing alkyl group, and R represents a group selected from an alkyl group having 1 to 100 carbon atoms, a polyoxylene alkyl group, a hydroxyl group, and a halogen-containing alkyl group. Specific examples include dimethylpolysiloxane oil, amine-modified silicone oil, epoxy-modified silicone oil, epoxy/polyether-modified silicone oil, carboxyl-modified silicone oil, polyether-modified silicone oil, alcohol-modified silicone oil, alkyl- and alkyl-aralkyl-modified silicone oil. Examples include silicone oil, alkyl/aralkyl/polyether-modified silicone oil, fluorine-modified silicone oil, alkyl/higher alcohol ester-modified silicone oil, methylhydrogene, polysiloxane oil, phenylmethyl silicone, and emulsified products thereof. can.

Dimethylpolysiloxane oil, epoxy-modified silicone oil, epoxy-polyether-modified silicone oil, polyether-modified silicone oil, amino-modified silicone oil and emulsions thereof are preferred in terms of anti-sticking properties and noise-preventing properties. Further, two or more of these may be mixed and used in any ratio. Furthermore, a known crosslinking agent that reacts with the reactive group of the silicone oil may be used in combination.

The organopolysiloxane suitable for the present invention has a viscosity of 100 centistokes (hereinafter referred to as C-8) or more and 5 million C-8 or less, preferably 2000 C·S or more and 3 million C-8 or more, as measured at 25°C. -8 or less is preferable.

In the present invention, -, the weight ratio of (a) and (b) (a/
b) is required to be 1/103 to 2/1. If the ratio is smaller than 1/103, the effects described in the present invention are not noticeable, which is not preferable. On the other hand, if it is larger than 2/1, the coating layer becomes brittle, which is not preferable.

When the weight ratio (a/b) is necessarily 1/10 to 1/8, it is particularly preferable because the effects described in the present invention and the adhesive strength with the base material are well balanced.

In the present invention, the weight ratio of (a) and (c) (a/c;
> is 1/20 to 50/1. If this is less than 1/20, the effect of increasing the volatilization temperature mentioned in the present invention becomes small, which is not preferable.On the other hand, if it is more than 50/1, the volatilization temperature will rise sufficiently, but the oil will not reach the swellable layered silicate. This is probably because the oil is completely trapped, but this is not preferable because the quality improvement effect of adding oil is lost.

In the present invention, it is necessary that the weight ratio (c/b) of (c) and (b) is 1/100 to 5/1. This is 1
If it is less than /100, the stick prevention effect is not sufficient, which is undesirable. On the other hand, if it is greater than 5/1, the coating film strength becomes weak, which is not preferred.

When the weight ratio (c/b) is 1/9 to 215, the balance of quality is particularly good and it is preferable.

The thickness of the mixture layer in the present invention is not particularly limited, but is usually 0.01 to 5 μm, preferably 0.02 to 1 μm.
More preferably, it is in the range of 0.03 to 0.5 μm.

Next, a typical method for manufacturing a thermal transfer material of the present invention will be described, but the present invention is not limited thereto. First, prepare a plastic film as a base material. This film may be subjected to corona discharge treatment in air or other various atmospheres, if necessary. Anchor treatment may be performed using a known anchor treatment agent such as urethane resin or epoxy resin, but this is usually not necessary. Mix (a), (b), and (c) in a predetermined ratio on the film, add various additives as necessary, and apply it using a known method such as gravure coating, reverse coating, or spray coating. After coating, 1S at 60℃~250℃
Dry for about 15 minutes. In this case, the solvent is not particularly limited, but usually water, alcohol, or a mixture of water and alcohol is used. Next, the opposite side of the plate is coated with heat-melting or sublimation ink in the same manner and dried at a predetermined temperature. These coats may be performed in any order, and of course may be performed simultaneously. Alternatively, a coating layer may be formed separately and laminated later, but since the coating layer is somewhat insufficient in strength, it is preferable to coat it directly onto the base film.

The transfer ink layer can be coated by a known method such as barcode coating, reverse coating, gravure coating, etc., regardless of whether the anti-sticking layer is applied beforehand.

Moreover, when the base film is biaxially stretched, it is possible to apply it during the manufacturing process. That is, to give a concrete example, a coating layer is applied to at least one side of the film after being stretched in one direction, and after drying, or after being stretched in a right angle direction while drying, heat treatment is performed, or a layer is applied in a right angle direction. In this method, the film is stretched in the same direction, then re-stretched in the one direction, and then heat treated.

In this way, when coating during the film manufacturing process,
Because it is possible to set the drying temperature higher than in normal cases, it is possible to apply and dry at high speed, and when using a curable resin, the effect is more effective and the heat resistance is further improved. However, applying and drying at high temperatures inevitably causes the added lubricant and surfactant to volatilize in large amounts, making the volatilization prevention effect described in the present invention more pronounced, which is preferable. It is.

[Effects of the Invention] In the present invention, the use of a swellable inorganic layered silicate makes it possible to obtain the following effects.

(1) As a result of being able to significantly raise the oil volatilization temperature, it became possible to raise the temperature at which A0 polycondensation was carried out, resulting in improved productivity.

B. The drying zone becomes clean because less oil evaporates.

(2) Since there is no transfer to the back side even if the film is left in a roll, the adhesion of the thermal transfer layer to the base paper is improved.

[Method for evaluating characteristics and effects] Sticking properties, noise during running, and print clarity were evaluated using a serial printer and a line printer shown below.

(a) Serial printer 2 Sharp Shoin WO300
Print voltage 10V, 12V using F type word processor
I ran it and printed it.

(b) Line type printer 2 Using Mitsubishi line thermal color printer G500F-10 type, applied voltage 17V
I ran it and printed it.

The evaluations of (a) and (b) above were determined based on the following criteria.

(1) Anti-sticking properties ◎: Running is stable with no sticking at all.

○: Hardly any sticking occurs.

Δ: Slight sticking occurs.

×: Sticking is significant and driving becomes impossible.

<2) Noise when driving ◎: Significantly small.

○: There is some noise, but it is hardly noticeable.

△: There is a very unpleasant noise.

X: The noise is extremely loud.

(3) Adhesion to the base film When the anti-sticking layer is peeled 90' from a commercially available cellophane adhesive tape using a commercially available cellophane adhesive tape (manufactured by Chiban Co., Ltd.), the area of the anti-sticking layer adhering to the cellophane tape after peeling is less than 20%. 01
A case of 20% or more and less than 50% was marked as Δ, and a case of 50% or more was marked as ×.

(4) Using a Shimadzu TG-30M with improved volatility, predetermined lubricants and surfactants were heated in air at a heating rate of 100/min, and the temperature T1 at which the thermogravimetry decreased by 5% was measured.

For a given lubricant or surfactant, the increase in T1 is 20
"○" indicates that the temperature is above ℃ but less than 40℃, "◎" indicates that the temperature is above 40℃, and rXJ indicates that the temperature does not reach 20'C.
It was judged as.

[Example] Next, the present invention will be explained based on examples.

Examples 1 to 7, Comparative Examples 1 to 3 Polyethylene terephthalate with an intrinsic viscosity of 0.65 in which calcium carbonate with an average particle size of 180 mμ was finely dispersed was
°C After drying in vacuum for 6 hours, melt at 285 °C and 60
The film was extruded onto a cooling drum at ℃. After this film was stretched 3.5 times in the machine direction at about 95°C, the following composition (A>) was applied at a concentration of 3% by weight so that the thickness after dry stretching was 0°25 μm. While drying the film at 110°C, it was stretched 3.5 times in the transverse direction, and
Tension heat treatment was performed at 5°C. The thickness thus obtained is 6
．． Thermal transferability of the film obtained by coating a 5-μm two-wheel stretched polyester film with 3 μm of a thermal transfer layer having the composition shown below and drying at 90° C. for 30 seconds was investigated (Table). ■Acid A (a) WMqz L i (S i 4010)乍2(
manufactured by Topy Industries, Ltd.) However, WI, tcHt −(cH2) 3 NH3+(
b) Epoxy polyether modified silicone oil (viscosity at 25°C measured with a B-type viscometer: 400 ocp, epoxy content: 0.5 wt%) (c) N-methylol acrylamide (manufactured by Soken Kagaku Co., Ltd. "'HMI00">100 Part by weight: 10-methylolated melamine (M50 manufactured by Sumitomo Chemical Co., Ltd.)
W"> 30 parts by weight However, the mixing ratio of a), (b) and (c) is shown in the table. Also, when using (a) and (b) together, (a)
and (b) were mixed and heated at 80°C.

Hada Kanori Carnauba wax 100 parts by weight Microcrystalline wax 30 parts by weight Vinyl acetate-ethylene copolymer 15 parts by weight Carbon black
As shown in the 20 parts by weight table, excellent properties are exhibited only when the content is within the range of the present invention. Also, the weight ratio of A/C is 1/2
It can be seen that in the case of ~8/1, a particularly excellent effect of improving consecutive losing streaks is exhibited.

Claims (1)

[Claims] (a) Swellable inorganic layered silicate (b) Water-soluble or water-dispersible swelling agent and/or surfactant (c) Thermosetting polyester, thermosetting acrylic, capable of condensation polymerization Consists of one or more water-soluble or water-dispersible resins selected from organometallic compounds, and the weight ratio of (a) and (b) is 1/10^3 to 2
/1, and the weight ratio (a/c) of (a) and (c) is 1/
A layer obtained from a mixture having a weight ratio (c/b) of 20 to 50/1 and a weight ratio (c/b) of (c) and (b) of 1/100 to 5/1 is placed on one surface of the plastic film, and on the other side. A heat-sensitive transfer film characterized by having a heat transfer layer on its surface.