JPH04251790A - Ink ribbon for making dry type transfer material - Google Patents

Abstract

PURPOSE:To provide an ink ribbon for manufacturing dry type transfer material wherein an ink transfer image obtained by transferring on a re-transfer sheet by thermal transfer method can be re-transferred pressure sensitively very easily and efficiently on a final matter to be transferred. CONSTITUTION:An ink ribbon for manufacturing dry type transfer material is constituted of a pressure sensitive adhesive layer 2, a pressure sensitive re- transfer adjusting layer 4 containing a micro capsule 6 containing a mold release agent 5, and a thermal adhesive layer 7, formed on a film-like ribbon base material 1. Therefore, an ink transfer image printed on a re-transfer sheet 9 by thermal transfer method can be re-transferred pressure sensitively very easily on a desired final matter to be transferred such as paper, plastic, metal, and timber by only exerting pressure momentarily from a face opposite to a face on which the ink transfer image of the re-transfer sheet 9 is formed.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to an ink ribbon for producing dry transfer materials, and in particular, it is used in printers, typewriters, word processors, etc. having a thermal transfer mechanism to produce ink ribbons with poor wettability or peelability. For manufacturing dry transfer materials that can be thermally transferred and printed even on strong surfaces, and the ink transfer image obtained by thermal transfer can be pressure-sensitively retransferred onto the desired final transfer object using external pressure. Regarding ink ribbons.

0002

2. Description of the Related Art In recent years, ink ribbons for producing dry transfer materials have been put into practical use. Then, the ribbon cartridge containing the ink ribbon for dry transfer material production is installed in the dry transfer material production equipment, and one of the many heat generating elements of the thermal head generates heat corresponding to the characters, figures, etc. to be recorded. By only generating heat from the elements, the main ink component of the ink ribbon for dry transfer material production corresponding to desired characters, figures, etc. is thermally transferred onto the retransfer sheet for dry transfer material. Thereby, it is possible to manufacture a dry transfer material having a desired ink transfer image such as a character or a figure.

For example, regarding the structure of an ink ribbon for producing a dry transfer material, as described in JP-A-63-128990 and JP-A-63-128991, it is possible to A two-layer structure in which a homogeneous ink layer containing a resin and a pigment having pressure-sensitive adhesive properties and a homogeneous layer containing a resin having heat-sensitive adhesive properties are arranged, or JP-A-63-251287. As described in the publication, a homogeneous layer containing a resin having pressure-sensitive adhesive properties on a film-like ribbon base material;
Ink ribbons for producing dry transfer materials have been manufactured using either a two-layer structure in which a resin having heat-sensitive adhesive properties and a homogeneous ink layer containing a pigment are arranged.

0004

[Problem to be Solved by the Invention] It is an object of the present invention to produce a retransfer sheet using the ink ribbon for dry transfer material production produced as described above.
An ink transfer image is formed by thermally transferring the main component of the ink onto the sheet. However, when performing pressure-sensitive retransfer from the retransfer sheet, there is a problem in that the pressure-sensitive retransferability of the ink transfer image to the final transfer object is strictly inferior.

Specifically, in order to complete pressure-sensitive retransfer, the surface of the retransfer sheet on which the ink transfer image is formed is brought into close contact with the final transfer object such as paper, plastic, metal, wood, etc. After fixing, it is necessary to continue rubbing for a certain period of time from the side of the retransfer sheet opposite to the side on which the ink transfer image was formed. Therefore, if the retransfer sheet is not sufficiently fixed to the final transferred object and the retransfer sheet is shifted, it may collapse or spread, making it difficult to obtain a good pressure-sensitive retransfer image. had.

The present invention has been made to solve the above problems, and its purpose is to transfer an ink transfer image obtained by transferring onto a retransfer sheet by a thermal transfer method, An object of the present invention is to provide an ink ribbon for producing a dry transfer material that allows pressure-sensitive retransfer onto a final transfer object extremely easily and efficiently.

[0007]

[Means for Solving the Problems] The ink ribbon for producing dry transfer materials of the present invention is capable of transferring ink transfer images such as characters and figures obtained using a thermal transfer method to a desired final transfer material by external pressure. An ink ribbon for producing a dry transfer material that can be pressure-sensitively retransferred onto a film-like ribbon base material, comprising a pressure-sensitive adhesive layer and microcapsules containing a release agent. It is characterized by providing a pressure-sensitive retransfer adjustment layer and a heat-sensitive adhesive layer.

[0008]

[Function] According to the structure of the present invention described above, the pressure-sensitive retransfer adjustment layer is formed on the film-like ribbon base material and includes a pressure-sensitive adhesive layer and microcapsules containing and encapsulating a release agent. By having a structure in which a heat-sensitive adhesive layer is provided, the ink transfer image printed on the re-transfer sheet using the heat-sensitive transfer method can be transferred to the surface of the re-transfer sheet on which the ink transfer image was formed. By simply applying pressure instantaneously from the opposite side, pressure-sensitive retransfer can be carried out very easily onto the desired final transfer material such as paper, plastic, metal, wood, etc. and,
The pressure-sensitive retransferred printed image is free from collapse, fading, spreading, and brittleness, and therefore, it is possible to obtain a good pressure-sensitive adhesive image on the final transferred object.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The ink ribbon for producing a dry transfer material of this embodiment has a pressure-sensitive adhesive layer 2 on a film-like ribbon base material 1;
It is constructed by providing a pressure-sensitive retransfer adjustment layer 4 containing microcapsules 6 containing a mold release agent 5, and a heat-sensitive adhesive layer 7.

The pressure-sensitive adhesive layer 2 is a layer containing a pressure-sensitive adhesive composition, and the heat-sensitive adhesive layer 7 is a layer containing a heat-sensitive adhesive composition.

The mold release agent 5 used in this example is generally not limited as long as it has excellent mold release properties, but is most preferably silicone oil, fluorine oil, or olefin oil. It is desirable to use either paraffin oil or alkyd oil.

Examples of the microcapsule wall material that can be destroyed by external pressure include melamine-formaldehyde resin, urea-formaldehyde resin, gelatin,
Gum arabic, polyvinyl alcohol, egg white, alginate, zein, casein, methylcellulose
Uses known materials such as carbon dioxide, carboxymethyl cellulose, ethylene-maleic anhydride copolymer, vinyl methyl ether-maleic anhydride copolymer, urea-formalin resin, melamine-formalin resin, polyurethane resin, and polyurea. Is possible.

The capsule diameter of the microcapsules 6 is preferably 0.1 to 20 μm, but is preferably 0.1 μm to 20 μm in order to easily obtain a good pressure-sensitive retransfer image with a pressure equivalent to the stamp pressure. A thickness of .5 to 10 μm is particularly desirable. In other words, if the capsule diameter of the microcapsules 6 is less than 0.1 μm, the minimum pressure value required to destroy the microcapsules 6 increases significantly, making it difficult to destroy the microcapsules 6.

On the other hand, when the capsule diameter of the microcapsules 6 is 20 μm or more, the minimum pressure value necessary for breaking the microcapsules 6 is significantly reduced. Therefore, the microcapsules 6 become easily destroyed and the storage stability of the microcapsules 6 decreases, so the above range is particularly desirable.

Similarly, it is particularly desirable that the coating thickness be 1 to 20 μm, preferably 1 to 10 μm. In other words, if the coating thickness is less than 1 μm, the releasability necessary for good pressure-sensitive retransfer cannot be obtained. On the other hand, when the coating thickness is 20 μm or more and the capsule diameter of the microcapsules 6 is small, the microcapsules 6 are not easily destroyed. , the microcapsules 6 are easily destroyed. Therefore, the above-mentioned ranges are particularly desirable.

The film-like ribbon base material 1 used for the ink ribbon for producing a dry transfer material in this embodiment is not limited in any way, but is preferably a base material conventionally used as a base material for thermal transfer ink ribbons. Known ones are preferred. Most preferably, the thermal head is in close contact with the film-like ribbon base material 1.
Resin films made of polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyimide, polycarbonate, polysulfone, polyethersulfone, polyphenylene sulfide, etc., or papers such as capacitor paper and glassine paper. desirable.

[0018]Although the thickness thereof will be appropriately determined depending on the type of material, it is preferably 1 to 30 μm. However, in order to obtain a good ink transfer image, it is particularly desirable to use one having a thickness of preferably 3 to 20 μm. That is, the thickness of the film-like ribbon base material 1 is 1μ.
If the thickness is less than 3 m, the running properties of the ink ribbon will be significantly reduced.
If the thickness is 0 μm or more, the amount of heat required to generate heat from each heating element of the thermal head during recording increases, so the above range is particularly desirable.

Furthermore, dispersants or emulsifiers mainly used when microcapsulating the mold release agent 5 and preparing microcapsule liquid include sodium hexametaphosphate and sodium condensed naphthalene sulfonate. Known dispersants such as ionic surfactants, glycerin fatty acid esters, sucrose fatty acid esters,
It is possible to use known emulsifiers such as nonionic surfactants such as sorbitan fatty acid esters and propylene glycol fatty acid esters.

Furthermore, as the colorant 3 contained in at least one layer selected from the pressure-sensitive adhesive layer 2 and the pressure-sensitive retransfer adjustment layer 4, pigments such as carbon black are mainly used. However, dyes such as leuco dyes that develop color with acids, diazo dyes that develop color with bases, etc. can be used as appropriate, and are not limited in any way.

For example, known materials such as phthalide compounds, fluoran compounds, lactone compounds, triphenylmethane compounds, rhodamine lactam compounds, and quinone compounds are used as coloring components of leuco dyes that develop color with acids. can be mainly used. As a color developer, a phenolic substance or an acidic substance is mainly used, and a monochromatic color is produced by a coloring reaction proceeding with a coloring component at a thermal coloring temperature.

Diazo dyes that develop color with a base are composed of a combination of a diazo compound, which is an acidic substance, and a coupling compound, which is a basic dye precursor. It develops a monochromatic color upon contact with the material.

Next, the pressure-sensitive adhesive composition used as one component constituting the pressure-sensitive adhesive layer 2 includes polyvinyl chloride, polyvinyl chloride,
Polyacrylic ester, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, polyvinyl acetate, polyvinyl ether, polyvinyl acetal,
Vinyl polymers such as polyisobutylene, ethyl cellulose
It is used by containing at least one selected from fibrous polymers such as cellulose, nitrocellulose, and cellulose acetate, and rubber polymers such as chlorinated rubber and natural rubber.

[0024] The heat-sensitive adhesive composition used as a component constituting the heat-sensitive adhesive layer 7 may include resins having particularly high heat-sensitive adhesive properties, such as ethylene-vinyl acetate copolymer, polyvinyl acetate, ionomer, acrylic resin, etc. From polymers, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, polyvinylpyrrolidone, polyvinyl alcohol, polyamide, ethyl cellulose, etc. It is used by containing at least one selected species.

Further, the pressure-sensitive adhesive layer 2, the pressure-sensitive retransfer adjustment layer 4, and the heat-sensitive adhesive layer 7 can contain a tackifier, a binder agent, a surface modifier, and the like.

[0026] The tackifier mainly has the functions of improving the adhesion and hardness of ink, imparting cohesive force, imparting adhesive force, and tackifying the heat-sensitive adhesive composition and the pressure-sensitive adhesive composition. Examples of the resin used include petroleum resins, rosin resins, ketone resins, polyamide resins, phenol resins, and the like.

As binders, lipophilic binders such as protein-based binders such as casein and zein, cellulose-based binders such as nitrocellulose and acetylcellulose, and polyvinyl alcohol are used. - Le,
polyethylene oxide, carboxymethyl cellulose,
Water-soluble binders such as polyvinylpyrrolidone and hydroxypropyl cellulose, polyamide resins, polyester resins, polyethylene resins, polypropylene resins, polystyrene resins, polyvinyl chloride resins, ethylene-vinyl acetate copolymers, polymethyl methyl methacrylate, A resin binder containing at least one kind selected from thermoplastic binders such as ionomer resins.
In addition, vegetable waxes such as candelilla wax, carnauba wax, rice wax, and Japanese wax are used.
A wax-based binder containing at least one type selected from animal waxes such as beeswax, lanolin, and spermaceti, mineral waxes such as montan wax and ceresin, and petroleum waxes such as paraffin wax and microcrystalline wax. It is also possible to use

It is also possible to use a combination of at least one type selected from resin binders and at least one type selected from wax type binders, and there is no problem.

The surface modifier reduces stickiness and tackiness on the surface of the ink ribbon and reduces frictional resistance, thereby providing good storage stability without blocking and good ribbon running properties without meandering or slipping. Specific examples thereof include known materials such as fluorine-based polymers and silicone-based polymers.

[0030] The surface of the film-like ribbon substrate 1 opposite to the coated surface of the pressure-sensitive adhesive layer 2, pressure-sensitive retransfer adjustment layer 4, and heat-sensitive adhesive layer 7 is coated with a heat-resistant material such as silicone resin. It is possible to provide an anti-sticking layer containing a resin, and there is no problem even if it further contains at least one type of pigment selected from barium sulfate, titanium oxide, aluminum hydroxide, zinc oxide, calcium carbonate, etc. It is something without. The present invention will be described in detail below, but it goes without saying that the present invention is not limited in any way by the description of such embodiments.

[0031] In addition to the following examples, the present invention may be modified, modified, and improved in various ways based on the knowledge of those skilled in the art, as long as they do not depart from the spirit of the present invention. This is what needs to be understood.

(Example 1) First, the manufacturing process of an ink ribbon for producing a dry transfer material shown in FIG. 2 will be explained. First, the pressure-sensitive adhesive layer components are finely dispersed and emulsified. In the fine dispersion and emulsification process of the pressure-sensitive adhesive layer components, the colorant 3 and the pressure-sensitive adhesive composition are atomized by a mechanical method such as stirring, thereby uniformly containing the colorant 3 and the pressure-sensitive adhesive composition. This is a step of preparing the constituent fine dispersion liquid or emulsion liquid. Here, a dispersant or an emulsifier was used in order to efficiently finely disperse or emulsify and maintain the resulting finely dispersed liquid and emulsified liquid stably.

Subsequently, the fine dispersion or emulsion prepared in the fine dispersion and emulsification process of the components of the pressure-sensitive adhesive layer is applied using a known coating method, such as a bar coating method, a blade coating method, or an air knife coating method. It is applied onto the polyethylene terephthalate of the film-like ribbon substrate 1 by a gravure coating method, a roll coating method, a spray coating method, a dip coating method, or the like.

[0034] Immediately after the pressure-sensitive adhesive layer component is coated in the coating step, heat drying is performed in an atmosphere of 110°C. A pressure-sensitive adhesive layer 2 is formed by this drying process of the pressure-sensitive adhesive coating layer.

Next, by atomizing the silicone oil mold release agent 5 by a mechanical method such as stirring, a fine dispersion or emulsion containing the silicone oil mold release agent 5 uniformly is prepared. Finely disperse and emulsify the mold release agent. Here, in order to efficiently finely disperse or emulsify and maintain the resulting finely dispersed liquid and emulsified liquid stably, a dispersing agent,
Or use an emulsifier.

Furthermore, microcapsule wall materials and melamine-formaldehyde resins that have the property of destroying the fine dispersion or emulsion prepared in the fine dispersion or emulsification process of the mold release agent at a specific external pressure value or more are used. Let's include it,
A microencapsulation step for producing microcapsules 6 is performed.

Next, the microcapsules 6 produced in the microcapsulation process are finely dispersed or emulsified using a dispersant or an emulsifier, and then a wax binder is added to prepare a microcapsule liquid. fine dispersion and emulsification process.

The microcapsule liquid prepared in the fine dispersion and emulsification process of microcapsules is coated using known coating methods such as bar coating, blade coating, air knife coating, gravure coating, and roll coating. method, spray coating method, dip coating method, etc.
Coating onto the pressure sensitive adhesive layer 2.

[0039] In the drying process of the microcapsule coating layer, the polyethylene terephthalate of the film-like ribbon substrate 1 coated with the microcapsule liquid is heated to 110°C.
By heating and drying in an atmosphere, the pressure-sensitive retransfer adjustment layer 4 is formed.

Furthermore, by atomizing the heat-sensitive adhesive composition by a mechanical method such as stirring, a fine dispersion or an emulsion containing the heat-sensitive adhesive composition can be prepared. Perform fine dispersion and emulsification process. Here, too, a dispersant or emulsifier was used in order to efficiently finely disperse or emulsify and maintain the resulting finely dispersed liquid and emulsified liquid stably.

Subsequently, the fine dispersion or emulsion prepared in the fine dispersion and emulsification process of the heat-sensitive adhesive layer components is applied using a known coating method, such as a bar coating method, a blade coating method, an air knife coating method, It is applied onto the pressure-sensitive retransfer adjustment layer 4 by a gravure coating method, a roll coating method, a spray coating method, a dip coating method, or the like.

Finally, immediately after the coating of the heat-sensitive adhesive layer components in the coating step, heating drying is performed in an atmosphere of 110°C. Through this step of drying the heat-sensitive adhesive coating layer, the heat-sensitive adhesive layer 7 is formed, and the final ink ribbon for producing the dry transfer material of Example 1 is formed.

On the other hand, FIG. 3 is an enlarged cross-sectional view of a dry transfer material produced using the ink ribbon for producing a dry transfer material of Example 1. The dry transfer material 10 includes a heat-sensitive adhesive layer 7 on a re-transfer sheet 9, a pressure-sensitive re-transfer adjustment layer 4 containing microcapsules 6 containing a release agent 5, and a pressure-sensitive adhesive layer 4. The layer 2 is manufactured by sequentially laminating the layers 2. Next, the steps of the method for manufacturing the dry transfer material 10 will be briefly explained.

First, the ink ribbon for producing a dry transfer material according to this embodiment is housed in a cartridge to produce a ribbon cartridge. Then, the ribbon cartridge was transferred to a dry transfer material manufacturing device (manufactured by Brother Industries, Ltd., tape writer).
P-touch) and bring it into close contact with the thermal head 8 built into the dry transfer material manufacturing device.

The thermal head 8 is composed of a large number of heating elements (not shown), and has a mechanism in which only the heating elements corresponding to the characters, figures, etc. to be recorded generate heat during recording.

Next, by inputting data, only the heating elements corresponding to the characters, figures, etc. to be recorded are transferred to the pressure-sensitive retransfer adjustment layer 4 out of the many heating elements of the thermal head 8.
, heat is generated to a temperature higher than the thermal melting temperature of the pressure-sensitive adhesive layer 2 and the heat-sensitive adhesive layer 7. As a result, a desired ink transfer image is thermally transferred onto the retransfer sheet 9, and a dry transfer material 10 having a desired ink transfer image can be produced.

After the surface of the retransfer sheet 9 on which the ink transfer image was formed is closely fixed to the final transfer object, the surface of the retransfer sheet 9 opposite to the surface on which the ink transfer image was formed is The pressure-sensitive retransfer adjustment layer 4 and the heat-sensitive adhesive layer are instantly applied with pressure equivalent to the stamp pressure to destroy the microcapsules 6 and cause the contained silicone oil release agent 5 to flow out. The adhesion with 7 is significantly reduced.

Therefore, a pressure-sensitive retransfer image of good quality could be obtained from the desired ink transfer image onto the final transfer object such as paper, plastic, metal, or wood.

Silicone oil mold release agent 5 flows out instantly,
Since the adhesion between the pressure-sensitive retransfer adjustment layer 4 and the heat-sensitive adhesive layer 7 drops instantaneously, it has become possible to obtain a pressure-sensitive retransfer image in a very short time.

[0050] The magnitude of the stamp pressure corresponds to the pressure value required to destroy the microcapsules 6, and is 10 g.
/cm2 to 2000g/cm2, but preferably 70g/cm2 in order to easily obtain a good pressure-sensitive retransfer image.
It is particularly desirable that the thickness is from m2 to 1000 g/cm2. In other words, if the stamp pressure is less than 10 g/cm2, the microcapsules 6 will be difficult to break, resulting in poor pressure-sensitive retransferability.

On the other hand, when the stamp pressure is 2000g
/cm2 or more is a pressure value that cannot be obtained with a stamp. Therefore, the above-mentioned ranges are particularly desirable.

Moreover, since the pressure-sensitive retransfer adjustment layer 4 and the heat-sensitive adhesive layer 7 are separately provided on the pressure-sensitive adhesive layer 2, the pressure-sensitive retransfer adjustment layer 4 and the heat-sensitive adhesive layer 7 are provided separately. , microcapsules 6 containing and encapsulating the mold release agent 5 of the pressure-sensitive retransfer adjustment layer 4
This makes it possible to effectively destroy the mold and effectively contribute to mold release properties, making it possible to reliably obtain pressure-sensitive retransfer images of extremely good quality that are completely free of crushing, blurring, spreading, brittleness, etc. became.

As described above, a pressure-sensitive retransfer image obtained using a dry transfer material produced from the ink ribbon for producing a dry transfer material of this example, and a pressure-sensitive retransfer image of a conventional example as a comparative example. The results of observation and comparison of thermal shock resistance are shown in FIG.

Sample 1 is based on a pressure-sensitive retransfer image obtained using a dry transfer material produced from the ink ribbon for dry transfer material production of this example, and as a method for observation and comparison, specific To explain this in detail, first, the atmosphere is lowered stepwise from room temperature to -20°C and then left to stand continuously for 24 hours. After that, one cycle was made by continuously standing for 48 hours at 55°C in an 80% RH atmosphere and 24 hours in a -20°C atmosphere for a total of 72 hours.
Continue to leave for 0 cycles. Then, visual observation was performed intermittently for each cycle up to 10 cycles, and the number of samples in which occurrence of cracks, bleeding, etc., and changes in hue, etc. were confirmed was determined for 100 test samples. It is.

In addition, the conventional pressure-sensitive retransfer image is, more specifically, a dry transfer material produced from an ink ribbon for dry transfer material production that does not contain microcapsules containing a release agent. This refers to a pressure-sensitive retransfer image obtained using

As a result of observation and comparison with the pressure-sensitive retransfer image of the conventional example, it was found that the pressure-sensitive retransfer adjustment layer of Example 1 contained silicone oil mold release agent 5 having excellent heat resistance and water repellency. Therefore, even after 480 to 720 hours, the pressure-sensitive retransfer image obtained using the dry transfer material produced from the ink ribbon for producing the dry transfer material of Example 1 shows no cracks, smearing, etc., and no hue. No other changes were observed, indicating that the material had excellent thermal shock resistance.

(Example 2) A coloring agent 12 is contained in the pressure-sensitive retransfer adjustment layer 4 shown in FIG.
An ink ribbon for producing a dry transfer material was produced in the same manner as in Example 1 except for the following. FIG. 4 is an enlarged cross-sectional view of the ink ribbon for producing a dry transfer material of Example 2.

Although it is common to use the same material for the coloring agent 3 and the coloring agent 12, it is also possible to use materials with different structures to express the same hue or to express an intermediate color. There is nothing wrong with doing something like that.

Then, in the same manner as in Example 1, a dry transfer material was produced from the ink ribbon for producing a dry transfer material.
As a result of the pressure-sensitive retransfer test, the microcapsules 6 were destroyed, the release agent 5 was leaked, and the pressure-sensitive retransfer adjustment layer 11 and the heat-sensitive adhesive layer 7 were separated by external pressure equivalent to the stamp pressure. Since the adhesion force was significantly reduced, it was possible to obtain a pressure-sensitive retransfer image of good quality without crushing, spreading, brittleness, etc.

Moreover, the colorant 1 is added to the pressure-sensitive retransfer adjustment layer 11.
2 and coloring agent 3 in the pressure-sensitive adhesive layer 2, the cohesive force of the ink transfer image is improved, so that there is no scratching or other problems on the final transfer object on which the ink transfer image is desired. It is now possible to perform pressure-sensitive retransfer in the perfect form.

Furthermore, as in Example 1, since the mold release agent 5 was used, which significantly reduces the adhesion between the pressure-sensitive retransfer adjustment layer 11 and the heat-sensitive adhesive layer 7 in a very short time, It also became possible to obtain pressure-sensitive retransfer images.

Using the pressure-sensitive retransfer image obtained as described above and the pressure-sensitive retransfer image of the conventional example as a comparative example, the thermal shock resistance was observed and compared in the same manner as in Example 1. Figure 6
Shown below.

Sample 2 is based on a pressure-sensitive retransfer image obtained using a dry transfer material produced from the ink ribbon for producing dry transfer materials of Example 2.

As a result of observation and comparison with the pressure-sensitive retransfer image of the conventional example, it was found that the pressure-sensitive retransfer adjustment layer of Example 2 contained silicone oil mold release agent 5 having excellent heat resistance and water repellency. Therefore, even after 480 to 720 hours, the pressure-sensitive retransfer image obtained using the dry transfer material produced from the ink ribbon for dry transfer material production of Example 2 shows no cracks, smearing, etc., and no hue. No other changes were observed, indicating that the material had excellent thermal shock resistance.

(Example 3) Pressure-sensitive adhesive layer 2 in FIG.
Example 1 except that the colorant 3, which is a constituent component, was removed to form the pressure-sensitive adhesive layer 13, and the pressure-sensitive retransfer adjustment layer 4 was made to contain the colorant 12 to form the pressure-sensitive retransfer adjustment layer 11. In the same manner, an ink ribbon for producing a dry transfer material was produced. FIG. 5 is an enlarged cross-sectional view of the ink ribbon for producing a dry transfer material according to Example 3.

Then, in the same manner as in Example 1, a dry transfer material was produced from the ink ribbon for producing a dry transfer material.
As a result of the pressure-sensitive retransfer test, the microcapsules 6 were destroyed, the release agent 5 was leaked, and the pressure-sensitive retransfer adjustment layer 11 and the heat-sensitive adhesive layer 7 were separated by external pressure equivalent to the stamp pressure. Since the adhesion force was significantly reduced, it was possible to obtain a pressure-sensitive retransfer image of good quality without crushing, spreading, brittleness, etc.

Furthermore, as in Example 1, since the mold release agent 5 was used, which significantly reduces the adhesion between the pressure-sensitive retransfer adjustment layer 11 and the heat-sensitive adhesive layer 7 in a very short time, It also became possible to obtain pressure-sensitive retransfer images.

The thermal shock resistance was observed and compared in the same manner as in Example 1 using the pressure-sensitive retransfer image obtained as described above and the pressure-sensitive retransfer image of the conventional example as a comparative example. Figure 6
Shown below.

Sample 3 is based on a pressure-sensitive retransfer image obtained using a dry transfer material produced from the ink ribbon for producing dry transfer materials of Example 3.

As a result of observation and comparison with the pressure-sensitive retransfer image of the conventional example, it was found that the pressure-sensitive retransfer adjustment layer of Example 3 contained a silicone oil mold release agent 5 having excellent heat resistance and water repellency. Therefore, even after 480 to 720 hours, the pressure-sensitive retransfer image obtained using the dry transfer material produced from the ink ribbon for producing the dry transfer material of Example 3 shows no cracks, smearing, etc., and no hue. No other changes were observed, indicating that the material had excellent thermal shock resistance.

[0071]

Effects of the Invention As described above, according to the present invention, a pressure-sensitive adhesive layer comprising a pressure-sensitive adhesive layer and microcapsules containing a release agent on a film-like ribbon base material is provided. By having a structure that includes a retransfer adjustment layer and a heat-sensitive adhesive layer, the ink transfer image printed using the heat-sensitive transfer method can be transferred to the opposite side of the retransfer sheet on which the ink transfer image was formed. Even if pressure is applied instantaneously from the side surface to cause pressure-sensitive retransfer onto the desired final transfer material such as paper, plastic, metal, or wood, the pressure-sensitive retransferred printed image may be crushed, spread, or brittle. Therefore, it has become possible to very easily and reliably obtain a good image pressure-sensitively adhered onto the final transferred object.

In addition, by instantly applying only the pressure equivalent to the stamp pressure to the surface of the retransfer sheet opposite to the surface on which the ink transfer image is formed, pressure sensitive retransfer can be achieved in an extremely short time. The transfer is then allowed to complete.

[Brief explanation of the drawing]

FIG. 1 is an enlarged cross-sectional view of an ink ribbon for producing a dry transfer material according to the present invention.

FIG. 2 is a block diagram showing a manufacturing process of an ink ribbon for manufacturing a dry transfer material.

FIG. 3 is an enlarged cross-sectional view of a dry transfer material produced using the ink ribbon for dry transfer material production of Example 1.

FIG. 4 is an enlarged cross-sectional view of an ink ribbon for producing a dry transfer material according to Example 2.

5 is an enlarged cross-sectional view of an ink ribbon for producing a dry transfer material according to Example 3. FIG.

FIG. 6: A pressure-sensitive retransfer image obtained using a dry transfer material produced from an ink ribbon for producing a dry transfer material of the present invention and a pressure-sensitive retransfer image of a conventional example as a comparative example. It is a figure showing the result of observation and comparison of the characteristics.

[Explanation of symbols]

1 Film-like ribbon base material 2 Pressure sensitive adhesive layer 3 Coloring agent 4 Pressure sensitive retransfer adjustment layer 5 Mold release agent 6. Microcapsules 7 Heat-sensitive adhesive layer 8 Thermal head 9 Retransfer sheet 10 Dry transfer material 11 Pressure sensitive retransfer adjustment layer 12 Coloring agent 13 Pressure sensitive adhesive layer

Claims (1)

[Claims] 1. Manufacture of a dry transfer material capable of pressure-sensitive retransfer of ink transfer images such as characters and figures obtained using a thermal transfer method onto a desired final transfer object using external pressure. In the ink ribbon for use, a pressure-sensitive adhesive layer, a pressure-sensitive retransfer adjustment layer containing microcapsules containing a release agent, and a heat-sensitive adhesive layer are provided on a film-like ribbon base material. An ink ribbon for producing dry transfer materials, which is characterized by: