JP2942782B2 - Heat transfer sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]   The present invention relates to a heat transfer sheet. [Problems to be solved by conventional technology and invention]   In recent years, the picture on the CRT display is more like a direct picture
As a recording method for recording various images,
Thermal transfer by thermal head, etc.
Heats the sheet and heats the dye in the colorant layer of the thermal transfer sheet
Thermal transfer that records image information by transferring it to a transfer sheet
A recording method is adopted. This thermal transfer recording method
Anne, magenta, and yellow
To transfer a color image with continuous changes in color shades
It is attracting attention as a recording method.   However, the thermal transfer system used in the above recording method
The sheet records a wide range of information on the heat transfer sheet,
However, conventional heat transfer sheets are
The sheet itself warps due to the temperature and humidity conditions at the time of existence.
Has the drawback that curling occurs.
Handling of heat transfer sheet before or after transfer recording is more
It is always inconvenient, and also leads to a decrease in product value.
there were.   Also, the conventional heat transfer sheet is
If the image density is insufficient and the image definition is poor,
When the so-called rough phenomenon where the part is missing occurs
It also had such a problem.   The present invention has been made in view of such conventional technology, and
Good image reproducibility and curl during storage
The purpose is to provide an excellent heat transfer sheet
You. [Means for solving the problem]   The present invention provides (1) a substrate, a cushion layer on the substrate,
The dye in the sheet material layer and the coloring material layer of the thermal transfer sheet is heated and transferred.
The receiving layer, which is copied and recorded according to the image information, is
Adhesion to the back side of the base material
Curl composed of sheet-like objects provided via layers
A heat-transferable transfer sheet characterized by forming a prevention treatment layer.
(2) The cushion layer is formed with an adhesive or an adhesive.
The heat transfer sheet according to claim 1,
(3) Patent in which the base material is a flexible foamed plastic film
The heat transfer sheet according to claim 1 or 2,
(4) The receiving layer is a receiving layer that has been subjected to a release-imparting treatment.
The heat receiving device according to any one of claims 1 to 3,
The transfer sheet is a gist. 〔Example〕   Hereinafter, embodiments of the present invention will be described with reference to the drawings.   FIG. 1 shows an embodiment of a heat transfer sheet 1 of the present invention.
In the figure, 2 is a substrate, 3 is a cushion layer, and 4 is a sheet.
5 is a receiving layer, 6 is a car provided on the back surface of the substrate 2
Each shows an anti-static layer.   The curl prevention treatment layer 6 is subjected to heat transfer during storage.
Processing having a function of preventing warpage of sheet 1
Layer.   The cause of curl in conventional heat transfer sheets
The main body 2 and the receiving layer 5 provided on the base 2
Material differences between each layer,
In other words, physical properties such as coefficient of thermal expansion and hygroscopicity between the substrate 2 and other layers
For example, because of the difference between
-Warping may occur due to heating of the head, etc.
Also, warpage may occur due to changes in storage conditions before or after transfer recording.
It is thought to occur. Therefore, the curl prevention treatment layer 6
Is composed of layers of the same material as the respective layers provided on the upper surface side of the base material 2.
Is most preferable, but at least
Approximate physical properties such as thermal expansion coefficient and hygroscopicity
Prevents curl generation by using a material made of
Can be   The anti-curl layer 6 in the present invention is shown in FIG.
Sheet-like material provided on the back surface of the base material 2 with an adhesive layer 7
8.   The material of the sheet material 8 used for curling prevention and
And polyethylene terephthalate, polyethylene na
Polyester resin such as phthalate, expanded polypropylene
Unstretched polypropylene, ethylene-vinyl acetate
Coalescence, ionomer, cellulose acetate, polycarbonate
Bonate, rigid or semi-rigid vinyl chloride and the like,
Also, paper such as condenser paper can be used. The sea
The thickness of the substrate 8 is about 2 to 60 μm.
The thickness of the sheet-like material layer 4 provided on the upper surface side is also 2 to 60 μm.
And the difference in thickness between the two is within ± 70%, preferably
Each thickness is set to be within ± 40%
You.   The sheet material 8 is provided on the back surface of the base material 2 via the adhesive layer 7.
The adhesive layer 7 is made of polyurethane resin and polyvalent isocyanate.
, Titanium, chelating agents, curing agents such as organic titanium compounds
Commercially available dry lamination consisting of a combination of
Adhesive or acrylic resin alone or combined with the above curing agent
Commercially available pressure-sensitive adhesive, UV-curable
It is formed using an adhesive and an electron beam-curable adhesive. Again
The bonding layer 7 is a material described as a material of a cushion layer described later.
Can also be used.   As a method for forming the adhesive layer 7, a normal solution coating is used.
Extrusion coating, hot melt
Can also be used. Also, a proper support
The support was impregnated with the ink composition for forming a cushion layer.
Then, both sides of the base material 2 and the sheet material 8 are laminated.
Therefore, a cushion layer may be formed. Drying of adhesive layer 7
3 ~ 30g / m after drying^TwoIs preferred.   Also, the back side of the heat transfer sheet 1 of the present invention, that is, the curl prevention
On the lower surface of the sheet-like material 8 constituting the treatment layer 6, FIG.
As shown, a slip layer 10 can be provided if necessary.
You. Heat transfer sheets are stacked and sent out one by one and rolled.
In some cases, copying may be performed.
The competitors can slip smoothly and send out one sheet at a time.
Can be. The material of the lubricating layer is methylmethacrylate
Methacrylate resin or corresponding ac relay
Resins, vinyl chloride-vinyl acetate copolymer, etc.
Resins and the like.
Add organic or inorganic particles to adjust the coefficient
You can also. This lubricating layer 10 is formed by coating,
The amount of coating after drying at that time is 0.5 to 10 g / m^Two, Preferably 1-2
g / m^TwoIt is.   In the present invention, the base material 2 is a synthetic paper (polyolefin).
Fins, polystyrenes, etc.), high quality paper, art paper,
Coated paper, cast coated paper, wallpaper backing paper, synthetic tree
Fat or emulsion impregnated paper, synthetic rubber latex impregnation
Paper, synthetic resin paper, paperboard, or cellulose fiber paper
Such as natural fiber paper, polyethylene or polypropylene
Such as polyolefin, polyvinyl chloride, polyvinyl chloride
Liden, polyvinyl alcohol, acrylic resin, cell
Loose resin, ethylene vinyl acetate copolymer, ethylene
Vinyl alcohol copolymer, ionomer, polyester
, Aliphatic polyamide, aromatic polyamide, polycarbonate
Nate, polyarylate, polyether sulfone,
Reether ether ketone, polyetherimide, poly
Various plastic films or sheets such as imides,
Soft foam plastic made of the above various synthetic resins
Films or sheets can be used.   Of these, synthetic paper has low thermal conductivity on its surface.
With a microvoid layer (high thermal insulation if reduced)
Is preferred. Another soft foam plastic
Lum has excellent heat insulation effect of the foam,
Heat from the thermal head, etc. is partially radiated to the outside of the heat transfer sheet
Insulated by the foam substrate without being lost
To the receiving layer, resulting in good image density.
This is preferable in that favorable transfer can be performed.   Further, as the base material 2, any combination of the above to
A laminate according to the invention can also be used. As an example of a typical laminate,
Cellulose fiber paper and synthetic paper, or cellulose fiber
A laminate of paper and plastic film or sheet
No. Of these, the product of cellulose fiber paper and synthetic paper
The layered body shows the thermal instability (such as expansion and contraction) of synthetic paper
Cellulose fiber paper supplements the low thermal conductivity of synthetic paper
High printing thermal sensitivity. Also this union
Synthetic paper to balance the front and back of the laminate
~ Cellulose fiber paper ~ Synthetic paper using a three-layer laminate
Good curling due to printing can be reduced.   Usually, synthetic paper used for the above-mentioned laminate is coated.
What if it can be used as a substrate for thermal transfer sheet
Can be used, but especially paper with fine pores
Synthetic paper provided with a layer (for example, commercially available synthetic paper: Yupo: Wang)
(Made of synthetic oil paper). In the above paper-like layer
The fine pores are formed by, for example,
It can be formed by stretching. The above micro-voids
Heated using synthetic paper provided with a paper-like layer containing
The transfer sheet is soft when the image is formed by thermal transfer.
Image density is similar to that of a base made of foamed plastic film.
The effect is high and the image is not rough.
You.   This is because the fine pores have a heat insulating effect,
ー Efficient efficiency and cushioning due to micro holes
Is provided on the synthetic paper to form an image.
It seems to contribute to the layer. Also contains the above microvoids
The surface of the core material such as cellulose fiber paper
Can also be provided.   Plastics other than cellulose fiber paper in the above laminate
Black film can be used.
Laminated fiber paper and plastic film
Things can also be used.   Examples of methods for attaching synthetic paper and cellulose fiber paper
For example, pasting using a conventionally known adhesive, extrusion lamination
Sticking using the method, sticking by thermal bonding, and,
As a method of attaching synthetic paper and plastic film,
Laminate that simultaneously forms a plastic film
Method, a sticking method by a calendar method or the like. Paste above
The attachment means is appropriately selected according to the material of the material to be attached to the synthetic paper
Is done. Specific examples of the adhesive include ethylene-acetic acid.
Emulsion bonding of vinyl copolymer, polyvinyl acetate, etc.
Water-soluble adhesive for polyesters containing carboxyl groups
And the like, and as an adhesive for lamination,
Polyurethane-based, acrylic-based organic solvent solution type, etc.
Adhesive. The thickness of these substrates is usually 30-20
0 μm is preferred.   The cushion layer 3 is a soft layer having cushioning properties.
And its 100% modulus is 250kg / cm^TwoTo be
preferable. The cushion layer 3 is a thermal head for printing.
When pressed, the receiving layer changes corresponding to the tip of the head.
It is provided so that it can be
The thicker, the better cushioning
Therefore, the print density can be improved. The
The material of the cushion layer 3 may be polyurethane resin, poly
Ester resin, acrylic resin, ethylene-vinyl acetate
Copolymer resin, vinyl acetate-acrylic copolymer resin,
Polyvinyl chloride resin, polyethylene resin, polypropylene
Resin, polystyrene resin, polyurethane elastomer,
Epoxy resin, vinyl chloride vinyl acetate copolymer resin,
Vinyl acetate resin, alkyl titanate, polyethylene
Imine, polybutadiene, ethylene-acrylic copolymer
Resins, ionomers and the like. Also cushion layer
As the material of the third, in addition to the above materials, an adhesive or an adhesive
Can be used. This adhesive or pressure-sensitive adhesive is
The adhesive and the pressure-sensitive adhesive used to form the adhesion layer 7 are used.
You.   Also, the thickness of the cushion layer 3 is thick as described above.
The thicker, the better the cushioning, but
Even if the thickness is too thick, the overall thickness of the heat transfer sheet will increase.
In the range of about 1 to 200 μm if necessary.
Is preferred, but for better cushioning
Is suitably about 3 to 30 μm.   As a method of forming the cushion layer 3, a method of forming the adhesive layer 7
Extrusion method other than normal solution coating
Version coating, hot melt coating, etc.
Ink used for forming cushion layer on suitable support
After impregnating the composition, the base material 2 and the sheet-like material layer 4
It can also be formed by laminating.   In addition, the cushion layer 3 has a higher cushioning property.
It is also possible to form fine bubbles. Forming bubbles
To do this, use the ink composition for forming the cushion layer.
Use a W / O emulsion. Add blowing agent.
Impregnate the nonwoven fabric with ink. When applying ink
Using a method such as stirring air bubbles to entrain air bubbles
Can be.   The sheet-like material layer 4 is located between the cushion layer 3 and the receiving layer 5.
The two layers are separated by a sheet-like material
The layer 4 is used to cover the cushion layer 3 from the receiving layer 5.
Transfer of the resin for forming the protective layer can be prevented, and
Cushion layer 3 of dye transferred to receptor layer 5 during printing
Can be prevented. Furthermore, cushion layer
The conventional heat transfer sheet provided with
In order to move to the receiving layer, the resin forming the cushion layer
It cannot be used unless it has the appropriateness as a container
Had the disadvantage that the sheet
This point can be solved by interposing the material layer 4.
You can do it. In addition, poly-
Use very smooth film material such as ester film
The surface of natural paper, synthetic paper, etc.
When a cushion layer and a receiving layer are laminated on the material 2,
The surface of the shell also follows the irregularities on the substrate surface, causing loss of smoothness.
However, at this point, a smooth surface receiving layer was formed.
And thus a receiving layer with a smooth surface can be obtained
To prevent print surface roughness due to missing dots
The required thickness of the cushion layer 3 can be reduced.   The material of the sheet is the same as that of the sheet 8 described above.
Can be used.   As described above, the heat transfer sheet 1 of the present invention
The cushion layer 3, the sheet-like material layer 4, and the receiving layer 5 are sequentially provided.
And an adhesive layer 7 on the back surface of the substrate 2.
Composed of a sheet-like material 8 provided via
A layer in which the prevention treatment layer 6 is formed and is located near the substrate 2.
Are similar in contrast around the substrate 2
Thus, the anti-curl function is excellent.   In the present invention, the material constituting the receiving layer 5 is a thermal transfer screen.
Images of dyes migrating from dyes, such as sublimable disperse dyes
Receiving and maintaining the image formed by the receiving
Using a material that can be used
What is used in the receiving layer
Can be used, for example, the following (a) to
The synthetic resin (e) is used alone or in combination of two or more.
Can be used. (A) Those having an ester bond.   Polyester resin, polyacrylate resin,
Carbonate resin, polyvinyl acetate resin, styrene resin
Acrylate resin, vinyl toluene acrylate resin. (B) Those having a urethane bond.   Polyurethane resin and the like. (C) Those having an amide bond.   Polyamide resin (nylon). (D) Those having a urea bond.   Urea resin and the like. (E) Others having a highly polar bond.   Polycaprolactone resin, polystyrene resin, poly
Vinyl chloride resin, polyacrylonitrile resin, etc.   Alternatively, the receiving layer 5 comprises a saturated polyester and vinyl chloride /
It is composed of a mixed resin with a vinyl acetate copolymer.   Vinyl chloride / vinyl acetate copolymer resin is vinyl chloride
With a content of 85-97% by weight and a degree of polymerization of about 200-800
preferable. Also, the vinyl chloride / vinyl acetate copolymer component
Vinyl alcohol
And a maleic acid component.   The receiving layer 5 is also made of a polystyrene resin.
May be used, for example, styrenic monomers, such as
For example, styrene, α-methylstyrene, vinyltoluene
Polystyrene resin consisting of homopolymer or copolymer, or
Or, the styrene monomer and other monomers, such as
For example, acrylic acid esters, methacrylic acid esters,
Acrylic or acrylonitrile, methacrylonitrile, etc.
Is a copolymer with methacrylic monomer or maleic anhydride.
A styrene copolymer resin which is a polymer is exemplified.   In the present invention, the whiteness of the receiving layer 5 is improved and
Further enhance the sharpness of the shot image, and show the sheet to be transferred
Surface, and prevents retransfer of the transferred image.
White pigment can be added to the receiving layer for the purpose of stopping
You. Higher definition by adding white pigment
And transfer of images excellent in heat resistance and moisture resistance can be performed.
Also, a tree formed by laminating a resin such as the receiving layer 5 and the cushion layer 3.
The whiteness and glossiness of the base material 2 is impaired due to the color (yellowishness) peculiar to fat.
Can be prevented, especially when the substrate 2 is cast
Natural paper, such as coated paper, is brighter than synthetic paper.
The effect is great because the smoothness is poor.   White pigments include titanium oxide, zinc oxide, kaolin
Clay and the like are used, and these are used even if two or more kinds are mixed.
Can be The amount of white pigment added constitutes the receiving layer
The amount is preferably 5 to 50 parts by weight based on 100 parts by weight of the resin.   In the present invention, an ultraviolet absorber is added to the receiving layer 5.
Can be added. By adding an ultraviolet absorber
The light resistance of the dyed dye is further improved. UV absorption
As the agent, benzophenone type, hindered amine type,
Benzotriazoles and the like can be mentioned. Also, the amount added
Is 0.05 to 5 parts by weight based on 100 parts by weight of the resin constituting the receiving layer.
Parts.   The heat transfer sheet 1 of the present invention has a releasability from the heat transfer sheet.
Release-imparting treatment on the receiving layer 5 in order to improve the
be able to. The treatment includes, for example, release into the receiving layer.
Molding agents can be included. Poly as release agent
Ethylene wax, amide wax, Teflon powder
Solid waxes, fluorine-based, phosphate-based surfactants
Agents, silicone oils, etc.
Il is preferred.   Oily silicone oils should also be used.
However, a curable type is preferable. Curable silicone
Corn oils include reaction curable, light curable, and catalyst hardened
Reaction-curable silicone oils
Is particularly preferred. As a reaction-curable silicone oil
Means amino-modified silicone oil and epoxy-modified silicone
It is preferable to use a reaction oil and a reaction oil. these
The amount of curable silicone oil added depends on the amount of
0.5 to 30 parts by weight per 100 parts by weight of fat is preferred.   Further, as another example of the releasability imparting treatment, the receiving layer 5
The above-mentioned release agent is dissolved or dissolved in an appropriate solvent on a part or all of the surface.
Or after dispersing and applying, release it by drying etc.
An agent layer can be provided. Release agent constituting release agent layer
As the amino-modified silicone oil and epoxy
Particularly preferred is a reaction cured product with silicone oil.
No. The thickness of the release agent layer is 0.01 to 5 μm, particularly 0.05 to 2 μm
Is preferred. The release agent layer is provided on a part of the surface of the receiving layer 5.
Or on the entire surface, but on a part of the surface of the receptor layer.
In the case of glowing, the dot where the release agent layer is not provided
Impact record, thermal melting transfer record, record with pencil etc.
Can be performed, and sublimation transfer is performed on the part where the release agent layer is provided.
Make a copy and record and place another part on the part where the release agent layer is not provided.
Sublimation transfer recording method and other
It can be performed in combination with the recording method.   In addition, the antistatic agent should be added to the heat transfer sheet.
Can also. By incorporating an antistatic agent,
Not only can you make the sliding of
This has the effect of preventing dust from adhering to the thermal transfer sheet. band
Antistatic agent should be included in the substrate, receiving layer or lubricating layer
Or provided as an antistatic layer on the back of the substrate
Can be provided as an antistatic agent layer on the back of the substrate.
Preferably.   Further, in the present invention, a detection mark is provided on the heat transfer sheet.
It is also possible. The detection mark is on the thermal transfer sheet
It is very convenient when positioning with the copy sheet, etc.
For example, a detection mark that can be detected by a photoelectric tube detection device
It can be provided by printing or the like on the back surface of the base material or the like.   All layers constituting the heat transfer sheet of the present invention are all transparent.
Or at least one of the layers is opaque
Is also good. If all layers are transparent, they are transparent overall.
If at least one layer is opaque, it is totally opaque.
It is clear.   The heat transfer sheet of the present invention having the above-described structure
The color material layer of the copying sheet comes into contact with the receiving layer of the heat transfer sheet.
So that it overlaps with the thermal transfer sheet
After heating with a Sirma head from the holding material side, transfer
Sublimation dye in the color material layer is heated by peeling
The image is transferred to the receiving layer of the transfer sheet, and
An image corresponding to the information is recorded. At this time, the present invention
Because a cushion layer and a sheet-like material are provided,
It is possible to perform high-density transfer without blur.   The heat transfer sheet 1 of the present invention can be used for various purposes.
For example, when the heat transfer sheet is configured as a whole
Is a heat-transfer sheet for creating transparent originals used for OHP etc.
Can be used as a large photo image
When used by transfer recording, especially when storing after recording
Since the transfer sheet hardly bends, the conventional heat transfer sheet
Incorrect handling due to curl like transfer sheet
It is preferable because there is no.   The thermal transfer sheet has a thermal transfer layer on the substrate surface.
The substrate of the thermal transfer sheet is a condenser paper
ー, polyester film, polyethylene naphthalate
Film, polystyrene film, polysulfonefi
Film, polyimide film, polyvinyl alcohol film
Lum, cellophane, aramid (aromatic polyamide)
Plastic film such as lum is used.
Is 2 to 50 μm, preferably 2 to 12 μm. These programs
A plastic film has a smooth surface and mechanical strength
Is preferred because of the high
It is desirable to use a lamid film.   As a thermal transfer layer, it melts or sublimes by heating
It consists of a dye that transfers and a binder. The dye is
Preferably sublimable disperse dyes, sublimable oil-soluble dyes,
Or a sublimable basic dye with a molecular weight of 150-800,
Preferably it is 350-700. These dyes have sublimation temperature, color
Phase, weather resistance, dissolution in ink or binder resin
It is selected in consideration of the solution, etc.
You.   C.I. (short for color index, the same applies to the following)
J) Yellow 51, 3, 54, 79, 60, 23,
7, same 141   C.I.Disperse Blue 24, 45, 14, 301, 3
34, 165, 19, 72, 87, 287, 154, 26   C.I.Disperse thread 135, 146, 59, 1, 1
73, 60, 167   C.I.Disperse Violet 4, 13, 36, 5
6, same 31   C.I.Solvent Violet 13   C.I. Solvent Black 3   C.I.Solvent Green 3   C.I.Solvent Yellow 56, 14, 14, 16, 29   C.I.Solvent Blue 70, 35, 63, 36, 50,
Same 49, Same 111, Same 105, Same 97, Same 11   C.I.Solvent Red 135, 81, 18, 18, 25, 1
9, 23, 24, 143, 146, 182   Ethyl cellulose, as a binder for the thermal transfer layer,
Hydroxyethyl cellulose, ethyl hydroxyethyl
Cellulose, hydroxypropylcellulose, methylcellulose
Cellulose, cellulose acetate, cellulose acetate butyrate, etc.
Loose resin, polyvinyl alcohol, polyvinyl butyrate
Lal, polyvinylpyrrolidone, polyester, poly vinegar
Vinyl resin such as vinyl acid or polyacrylamide
Can be used.   The weight ratio of dye to binder in the thermal transfer layer is
It is desirable that the inder is 0.3 or more, and if it is less than 0.3,
Insufficient print density and thermal sensitivity. Also dye / binder
Over 2.3, the retention of the dye in the binder
Insufficiency causes the storage stability of the thermal transfer sheet to decrease. Follow
And the dye / binder is preferably 0.3 to 2.3
And more preferably 0.55 to 1.5.   The dye must be dissolved in the binder of the thermal transfer layer.
desirable. In conventional sublimation transfer paper for fabric, dye
Sublimates the dye because it is dispersed in the binder
Is the interaction between dye molecules and dye molecules
Need to give energy to overcome the mutual assistance between dar
Yes, inevitably require high energy,
Degree decreases. At this point, the dye dissolves in the binder
Is advantageous in terms of thermal sensitivity.   In addition, the thermal transfer sheet
It is possible to perform a fusion prevention treatment.   Next, the present invention will be described in more detail with reference to specific examples.
I do. Example 1   After adjusting the ink composition 1 for forming a cushion layer,
Color polyethylene terephthalate film (diafoil
5g / W900E, 100μm thick)
m^TwoIt applied so that it might become. Ink composition 1 for forming a cushion layer   3 parts by weight of polyurethane resin   (Takeda Pharmaceutical: Takerack A-367H)   1 part by weight of isocyanate   (Takeda Pharmaceutical: Takenate A-7)   3 parts by weight of ethyl acetate   Used as a sheet on the coated surface of the ink composition 1
12μm thick polyester film (Toray: Lumi
Was laminated.   Next, the ink composition is also provided on the back surface of the film substrate.
1 in the same manner, and then a 12 μm thick polyester
Film was laminated.   Next, it is placed on a polyester film on the top side of the substrate.
The ink composition 2 for forming a container is prepared and
Coating amount after drying on 4g / m^TwoCoated and transferred by heat
I got a sheet. Ink composition 2 for forming receiving layer   4 parts by weight of polyester resin   (Toyobo: Byron 600)   6 parts by weight of vinyl chloride-vinyl acetate copolymer   (Made by Denki Kagaku Kogyo: Denka Vinyl # 1000A)   0.2 parts by weight of amino-modified silicone   (Shin-Etsu Chemical: X-22-3050C)   0.2 parts by weight of epoxy-modified silicone   (Shin-Etsu Chemical: X-22-3000E)   20 parts by weight of methyl ethyl ketone   20 parts by weight of toluene   The obtained heat transfer sheet is cut into a size of 100 mm x 100 mm.
24 hours each at 5 ℃ and 50 ℃
After leaving it, place it on a flat surface
Measure the distance that the four corners of the test specimen are separated from the table surface,
The average value was defined as the curl amount, and the results are shown below.   On the other hand, heat-resistant lubrication made of thermosetting acrylic resin on one side
4.5μm thick polyester film with a layer (Toray
Manufactured by Lumirror) as a base material and a heat-resistant lubricating layer
On the other side, the coating amount after drying the following ink composition is 1 g / m^Two
To obtain a thermal transfer sheet as a thermal transfer layer.
Was. Thermal transfer layer forming ink composition (cyan)   4 parts by weight of disperse dye   (Nippon Kayaku: Kaya Set Blue-714)   6 parts by weight of polyvinyl butyral resin   (Sekisui Chemical: S-LEC BX-1)   Methyl ethyl ketone 45 parts by weight   45 parts by weight of toluene Ink composition for forming thermal transfer layer (magenta)   2.6 parts by weight of disperse dye   (Mitsui Toatsu Chemicals: MS Red G)   (Disperse Red 60)   1.4 parts by weight of disperse dye   (Made by Bayer: Macrolex Violet R)   (Disperse Violet 26)   4.3 parts by weight of polyvinyl butyral resin   (Sekisui Chemical: S-LEC BX-1)   Methyl ethyl ketone 45 parts by weight   45 parts by weight of toluene Ink composition for thermal transfer layer formation (yellow)   5.5 parts by weight of disperse dye   (Made by Bayer: Macrolex Yellow 6G)   (Disperse Yellow 201)   4.5 parts by weight of polyvinyl butyral resin   (Sekisui Chemical: S-LEC BX-1)   Methyl ethyl ketone 45 parts by weight   45 parts by weight of toluene   Dot density using the thermal transfer sheet and the thermal transfer sheet
Printing with the following printing conditions using a thermal head of 6 dots / mm
Was done. Printing conditions     Printing speed 33.3ms / line     Feed pitch 0.166mm     Pulse width 12.0ms     Head applied voltage 11.0V   Cyan reflection density using Macbeth color densitometer RD-918
Was found to be 1.95. The printing density is the printing surface
Uniform throughout, no missing dots
Was. In addition, all three colors have high print density, roughness, color shift,
A good image without formation unevenness was obtained.   By changing the pulse width, the electrical energy applied to the head
Any range from 0 to 2.2 by controlling
The print density was obtained with good reproducibility.   Next, change the thickness of the cushion layer
When printing was performed under the same conditions as described above, the results shown in the table below were obtained.
I got Comparative Example 1   Foamed white polyethylene terephthalate in the same manner as in Example 1.
A cushion layer is formed on the rate film, and the thickness is
A 12 mm polyethylene film was laminated. Scold
Later, the same receiving layer as in Example 1 was formed to obtain a heat transfer sheet.
Was.   In the same manner as in Example 1 using the obtained heat transfer sheet,
The curl amount was measured. The results are shown below.  The printing quality is the same as that of the first embodiment.
Was. Comparative Example 2   Foamed white polyethylene terephthalate in the same manner as in Example 1.
A cushion layer is formed on one side of the rate film, and
Was laminated with a polyethylene film having a thickness of 12 mm.
After that, the base without the polyethylene film
Dry the ink composition 3 for curl prevention coating layer formation on the surface of the material.
Application amount after drying is 10g / m^TwoIt applied so that it might become. Ink composition 3 for curl prevention coating layer formation   Acrylic resin 5 parts by weight   (Mitsubishi Rayon: Dianal BR-85)   10 parts by weight of toluene   Methyl ethyl ketone 10 parts by weight   Then, the product is put on a laminated polyethylene film.
Forming a receptor layer in the same manner as in Example 1 to obtain a heat transfer sheet
Was.   In the same manner as in Example 1 using the obtained heat transfer sheet,
The curl amount was measured. The results are shown below.   The printing quality was the same as that of the heat transfer sheet in Example 1.
Was equivalent to 〔The invention's effect〕   As described above, the heat transfer sheet of the present invention is
, A cushion layer, a sheet-like material layer, and a receiving layer are sequentially provided.
In addition, the back side of the substrate is provided with an adhesive layer
The curl prevention treatment layer composed of
Are formed, and the layers near the substrate sandwich the substrate
Symmetrically similar in mind, excellent in anti-curl function
Sheet hardly warps during storage.
In addition, due to the occurrence of curl in the conventional heat transfer sheet
This eliminates the inconvenience of handling.
Product price (as hard copy) for thermal transfer sheet
The values are stable and good.   According to the heat transfer sheet of the present invention, the substrate and the receiving layer
Because a cushion layer and a sheet-like material are provided between
Roughness and uneven density on the image transferred from the thermal transfer sheet
And no darkness and no print misregistration.
The effect is that a very clear image with high degree can be obtained.
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing one embodiment of the heat transfer sheet of the present invention. DESCRIPTION OF SYMBOLS 1 ... Heat transfer sheet 2 ... Substrate 3 ... Cushion layer 4 ... Sheet-like material layer 5 ... Reception layer 6 ... Curl prevention treatment layer

Claims (1)

(57) [Claims] Base material, a cushion layer, a sheet-like material layer on the base material,
In a heat transfer sheet, which is provided with a receiving layer in which a dye in a color material layer of a heat transfer sheet is transferred by heating and recording is performed in accordance with image information, a sheet shape provided with an adhesive layer on the back surface of the base material A heat transfer sheet comprising a curl prevention treatment layer formed of a material. 2. 2. The heat transfer sheet according to claim 1, wherein the cushion layer is formed of an adhesive or an adhesive. 3. 3. The heat transfer sheet according to claim 1, wherein the substrate is a soft foamed plastic film. 4. The heat transfer sheet according to any one of claims 1 to 3, wherein the receiving layer is a receiving layer that has been subjected to a release-imparting treatment.