JP3947599B2 - Thermal transfer sheet and transfer sheet temporary fixing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a thermal transfer sheet and a thermal transfer sheet temporary fixing method for transferring an image to an adherend by heating, and more particularly to a thermal transfer sheet and a thermal transfer sheet temporary fixing method capable of image recording for inkjet recording.
[0002]
[Prior art]
Conventionally, using a transfer sheet on which images such as characters and designs (hereinafter collectively referred to as “images”) are transferred, the images are transferred to a desired object (adhesive). Has been done.
[0003]
As this type of transfer sheet, there is a so-called thermal transfer sheet in which an image is transferred and fixed to an adherend by heating the transfer sheet. This transfer by heating is suitable for a relatively rough use form such as washing, such as a handkerchief or clothing, for example, since the fixing of the image is extremely strong and reliable. .
[0004]
This thermal transfer sheet will be described with reference to the cross-sectional view of FIG.
As shown in FIG. 6, the thermal transfer sheet 40 has a configuration in which an image forming layer 42 on which an image is formed and an adhesive layer 43 provided on the image forming layer 42 are provided on a substrate 41.
[0005]
Then, when transferring the image forming layer 42 to the adherend 30 such as clothing, as shown in FIG. 6, the adhesive layer 43 is overlaid on the adherend 30, and then, for example, an iron that is a heating means is used. Using at least the entire surface of the substrate 41 corresponding to the transfer region is heated. In this heating operation, the non-adhesive 30 is usually rubbed (for example, rubbed in the direction of the arrow X0) while appropriately pressing the iron.
[0006]
By such a heating operation, the adherend 30 and the image forming layer 42 are bonded to each other by the adhesive layer 43 in which the temperature rises due to heat and adhesive force is generated.
Thereafter, the base material 41 is peeled off from the image forming layer 42 to transfer the image forming layer 42 as if a predetermined image was formed on the adherend 30.
[0007]
[Problems to be solved by the invention]
In the conventional thermal transfer sheet 40 shown in FIG. 6 described above, the image forming layer 42 can be firmly transferred to the adherend 30 by the heating operation.
However, before heating, in a state where the thermal transfer sheet 40 is placed on the adherend 30, the thermal transfer sheet 40 is easily moved, and thus may deviate from a desired position.
[0008]
In particular, when the adherend 30 is made of a material that is relatively stretched and squeezed (for example, a cloth or a stretchable member), rub it with an iron or a hot press (in the direction of the arrow X0). From the heating operation, until the heat is transmitted and the adhesive layer 43 exerts the adhesive force, the thermal transfer sheet itself is also moved so as to be dragged by the movement of the heat source (iron or hot press) during the heating operation (in the direction of arrow X1). Therefore, there is a problem that the transfer position is deviated from a desired position.
[0009]
Further, when determining the position of the transfer image, particularly when the adherend 30 is clothing, see the state close to the actual state such as a state where the thermal transfer sheet is applied to the adherend 30 and hung on a hanger or the like. Is the best. Therefore, in the past, the current method is to stop with a clothespin or adhesive tape, or have another person bring it.
However, there has been a problem that clothespins and adhesive tapes interfere with heating operations such as ironing and hot pressing.
[0010]
The present invention has been made in view of the above-mentioned problems, and the object of the present invention is that the thermal transfer sheet is dragged by the movement of the heat source even when a heating operation such as rubbing with a heat source such as an iron is performed. It is an object of the present invention to provide a thermal transfer sheet and a thermal transfer sheet temporary fixing method capable of preventing the phenomenon, making the transfer position accurate, and facilitating the temporary fixing operation when determining the transfer position.
[0011]
[Means for Solving the Problems]
The thermal transfer sheet according to the present invention has, on a substrate, an image forming layer having an image holding function and an adhesive layer having an adhesive function with an adherend, and the image forming layer is applied to the adherend by heating. Is a thermal transfer sheet that can be transferred,
Adhesive force for temporary fixing to the adherend is generated by applying moisture to the adhesive layer. With adhesive (Claim 1) or an image forming layer having an image holding function and an adhesion function with an adherend on the substrate, and the image is formed on the adherend by heating. A thermal transfer sheet that allows a layer to be transferred, wherein the image forming layer is provided with moisture to cause temporary adhesion to the adherend. With adhesive Thus, the above object can be achieved.
[0012]
In the thermal transfer sheet according to the present invention,
In the adhesive layer, a component that generates an adhesive force by heating and a component that generates an adhesive force by applying moisture are mixed (Claim 2).
The adhesive layer has a thermal adhesive layer in which an adhesive force is generated by heating, and a temporary fixing layer in which an adhesive force is generated by applying moisture on the thermal adhesive layer (Claim 3).
In the image forming layer, a component that generates an adhesive force by heating and a component that generates an adhesive force by applying moisture are mixed (Claim 5).
An easy peeling means is provided between the substrate and the image forming layer (claim 6);
The image forming layer is composed of an ink receiving layer capable of forming an image by an inkjet recording method (claim 7);
・ Sheet edge generates adhesive force for temporary fixing With adhesive (Claim 8),
It is characterized by.
[0013]
The thermal transfer sheet temporary fixing method according to the present invention is: The method according to any one of claims 1 to 8. When transferring the image forming layer to the adherend using a thermal transfer sheet, before heating, an image is formed with the ink supplied to the image forming layer, and moisture on the ink forms the adherend. The adhesive strength that can be temporarily fixed is generated (claims) 9 ), Thereby achieving the above object.
[0014]
Moreover, in the thermal transfer sheet temporary fixing method according to the present invention,
Ink supply to the image forming layer is performed by an ink jet printer. 10 ).
[0015]
(Function)
According to the thermal transfer sheet of the present invention, the adhesive region of the adhesive layer or the image forming layer is configured so that the adhesive force is generated by the application of moisture, so that moisture is applied to the adhesive region before heating during the transfer operation. After the application, the thermal transfer sheet is placed at the transfer position to the adherend, whereby the thermal transfer sheet can be temporarily fixed at a predetermined position by the temporary fixing adhesive force in the bonding area. With this temporary fixing force, it is possible to counter the drag force that accompanies a heating operation such as rubbing with a heat source such as an iron. it can.
[0016]
The “adhesive strength for temporary fixing” as used herein is not an adhesive force involved in the penetration of a dye or the like into the adherend or the final fixing of the transfer image, but the thermal transfer sheet is temporarily attached to the adherend. It is sufficient if it can be held, and the adhesive strength is such that it does not damage the adherend during the re-sticking operation when determining the transfer position.
[0017]
Further, according to the thermal transfer sheet of the present invention, the adhesive layer or the image forming layer is configured to generate an adhesive force by heating and to generate an adhesive force by applying moisture. Both functions can be generated in a single layer, and the layer structure is not complicated. 5 ).
[0018]
According to the thermal transfer sheet of the present invention, the adhesive layer has a two-layer structure of a thermal adhesive layer in which an adhesive force is generated by heating and a temporary fixing layer in which an adhesive force is generated by applying moisture on the thermal adhesive layer. By having it, it becomes easy to exhibit the function of each layer more reliably (Claim 3).
[0019]
According to the thermal transfer sheet of the present invention, the easy peeling means is provided between the base material and the image forming layer, so that the base material and the image forming layer are more easily peeled off. 6 ).
[0020]
According to the thermal transfer sheet of the present invention, since the image forming layer is composed of an ink receiving layer capable of forming an image by an ink jet recording method, it does not have adhesiveness before moisture is added, so Various images desired by the user can be easily formed, and after image formation, it can be accurately transferred without misalignment due to the application of moisture. 7 ).
[0021]
According to the thermal transfer sheet according to the present invention, when the image transfer is aligned by adhering only the sheet end, the sheet end is configured to generate the temporary fixing adhesive force. Easy alignment. Further, when the temporary fixing is performed again, the operability is good because the bonded portion is the sheet end. Furthermore, if the sheet edge is a non-image area (in the case of an image formed by an ink jet printer, a blank area where the sheet edge becomes a non-image area is formed), the image area is used as a finger during temporary fixing operation. Can be avoided without touching and avoiding oil or dust on the image. 8 ).
[0022]
According to the method for temporarily fixing a thermal transfer sheet according to the present invention, when transferring the image forming layer to the adherend, an image is formed with ink supplied to the image forming layer before heating, and moisture of the ink is transferred. Thus, the adhesive force that can be temporarily fixed to the adherend is generated, so that the thermal transfer sheet can be temporarily fixed to a predetermined position by the temporary fixing adhesive force of the bonding region, and the transfer position is determined. The operability is improved, and further, for example, the drag force associated with the heating operation such as rubbing with a heat source such as an iron can be counteracted. Can be fixed (claims) 9 ).
[0023]
According to the thermal transfer sheet temporary fixing method according to the present invention, the temporary supply adhesive force can be automatically generated by image formation by supplying ink to the image forming layer by an ink jet printer. 10 ).
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a thermal transfer sheet and a thermal transfer sheet temporary fixing method according to the present invention will be described in detail with reference to the accompanying drawings.
[0025]
(First embodiment)
FIG. 1 is a cross-sectional view of the thermal transfer sheet according to the first embodiment of the present invention in a state where the thermal transfer sheet is superimposed on an adherend, and FIG. 2 is a cross-sectional view of the thermal transfer sheet according to the first embodiment. .
In the description of the first embodiment, first, the thermal transfer sheet will be described with reference to FIG. 2, and subsequently, the transfer operation will be described with reference to FIG.
[0026]
As shown in FIG. 2, the transfer sheet 10 includes an image forming layer 2 and an adhesive layer 3 provided on the image forming layer 2 (on the lower side in the drawing). It is the structure provided through.
[0027]
Then, when transferring the image forming layer 2 to the adherend 30 such as clothing, as shown in FIG. 1, before the adhesive layer 3 is overlaid on the adherend 30, water is applied to the surface of the adhesive layer 3. Apply an appropriate amount. By this application of water, the pressure-sensitive adhesive part 5 having adhesive force is formed on the surface of the adhesive layer 3 (the whole adhesive layer 3 may function as the pressure-sensitive adhesive part 5). Thereafter, the adhesive layer 3 is overlaid on the adherend 30.
Thereafter, the iron is rubbed (in the direction of the arrow X0) while being pressed with an appropriate pressure so as to heat the entire surface of the substrate 1 corresponding to the transfer region, for example, with an iron as a heating means.
[0028]
As described above, the adhesive layer 3 is configured so that the adhesive force is generated by application of water, so that moisture is applied to the adhesive layer before heating, and then to the adherend 30 as shown in FIG. By placing the thermal transfer sheet 10 at the transfer position, the thermal transfer sheet 10 is temporarily fixed at a predetermined position by the adhesive force of the adhesive layer 3.
[0029]
Due to the action of the adhesive force for temporary fixing, even if the drag force accompanying the heating operation such as rubbing with a heat source such as an iron (in the direction of the arrow X0) is large, the drag force can be countered and the position of the transfer position In a state in which the deviation is avoided, the adherend 30 and the image forming layer 2 are finally bonded by the adhesive layer 3 that has been heated to increase the temperature and generates an adhesive force.
[0030]
Thereafter, by applying a force so as to separate the base material 1 from the image forming layer 2, it can be easily peeled off by the easy peeling means 4, and the image forming layer 2 is transferred onto the adherend 30.
[0031]
The substrate 1 is not particularly limited, and conventionally known materials such as synthetic resin, paper, and synthetic paper can be used.
[0032]
The easy peeling means 4 that enhances the peelability between the substrate 1 and the image forming layer 2 can be formed as a peelable resin layer. For example, an acrylic resin, a melamine resin, a vinyl resin, an olefin chloride resin or the like can be used alone or in combination. May be. Moreover, as the easy peeling means 4, the structure which gives a silicon coating to the surface of the base material 1 in order to improve peelability more may be sufficient.
In addition, for example, carnauba wax, tree wax, cucumber wax, esvall wax, beeswax animal wax, insect wax, shellac wax, whale wax, oil wax, etc. Specific waxes such as paraffin wax, microcrystal wax, polyethylene wax, ester wax, acid wax, and mineral wax such as montan wax, ozokerite, and ceresin.
[0033]
In the thermal transfer sheet 10 according to the present invention, the image forming layer 2 may be configured as an off-the-shelf product on which an image is formed, but ink receiving that can easily form an image with an image forming apparatus such as an ink jet printer. It is desirable that the layers are formed.
[0034]
When the image forming layer 2 is composed of an ink receiving layer, for example, by forming an image with an ink jet printer (supplying ink to the image forming layer 2), the moisture of the ink causes the adherend 30 to adhere. An adhesive force capable of being temporarily fixed can be generated. That is, by supplying ink to the image forming layer 2 by an ink jet printer, it is possible to automatically generate temporary tacking adhesive force by image formation.
Further, since the sheet edge is a non-image area, it is possible to touch the image area where the adhesive force is generated during the temporary fixing operation with a finger. Furthermore, when the adhesive force generated by ink jet printing is reduced due to evaporation of moisture in the ink, provisional fixing operation can be performed without applying moisture to the print area by applying moisture to the non-image area. .
[0035]
The adhesive used for the adhesive layer 3 may be, for example, nylon hot melt powder, but may be a thermosetting resin or a thermoplastic resin as long as it can impart adhesiveness by heating.
Examples of the thermosetting resin include polyurethane, melamine resin, epoxy resin, and urea resin.
As thermoplastic resins, petroleum-based resins include ethylene copolymers, polyamide resins, polyester resins, polyurethane resins, polyacrylic resins, vinyl acetate resins, ionomer resins, polyolefin resins, vinyl chloride resins, For elastomers such as cellulose resin and rosin resin, natural rubber, styrene butadiene rubber, isoprene rubber, chloroprene rubber, diene copolymer, etc.For rosin derivatives, ester gum, rosin maleic resin, rosin phenol resin, hydrogenated rosin Examples of aromatic hydrocarbon resins include phenol resins, terpene resins, and cyclopentadiene resins.
[0036]
There are no particular restrictions on the type of adhesive that produces adhesive strength when moisture is applied. Preferred examples of adhesives include protein systems such as glue, gelatin, casein, albumin, and soy protein, and water-containing contents such as starch and dextrin. Carbon-based, cellulose-based, such as methylcellulose, hydroxyethylcellulose, ethylhydroxyethylcellulose, carboxymethylcellulose, and bisulose, and water-soluble adhesives such as gum arabic, tragacanth gum, and sodium alginate are used. These are used alone or in admixture of two or more. May be. Moreover, you may mix | blend suitably polyvinyl ethyl ether, glycerin, causticity, a polyhydric alcohol, etc. for the purpose of adhesive improvement, coating property, stability, etc.
[0037]
The mixing ratio of the component that generates adhesive force by heating and the component that generates adhesive force by applying moisture varies depending on the component, and can be, for example, 9: 1 to 1: 9.
[0038]
Examples of the material added to the ink receiving layer include silica, calcium carbonate, calcium hydroxide, magnesium hydroxide, talc, clay, kaolin, diatomaceous earth, barium sulfate, titanium oxide, zinc oxide, satin white, and silicic acid. Examples thereof include aluminum and lithopone.
[0039]
Further, as a method of providing the easy peeling means 4, the image forming layer 2, and the adhesive layer 3, for example, a method of applying and drying using a known apparatus such as a bar coater, a spin coater, an air knife coater, a blade coater, or a roll coater. Can be adopted.
[0040]
Strictly speaking, the thicknesses of the easy peeling means 4, the image forming layer 2, and the adhesive layer 3 are set so as to be balanced with the recording ink composition, the amount of ink applied per unit area, and the other layers. The easy peeling means 4 is preferably about 1 to 15 μm, the adhesive layer 3 is about 1 to 20 μm, and the image forming layer 2 (ink absorbing layer) is preferably about 5 to 40 μm.
[0041]
When the image forming layer 2 is composed of an ink receiving layer, the recording ink composition corresponding to the ink receiving layer may be composed of a colorant, an organic solvent, or the like.
Preferred examples of the colorant include pigments, direct dyes, acid dyes, food dyes, basic dyes, reactive dyes, disperse dyes, architectural dyes, soluble architectural dyes, reactive disperse dyes, and oily dyes. Any of them can be used, but water-soluble dyes are preferably used in view of the performance of the recording liquid.
[0042]
As the pigment, inorganic pigments and organic pigments can be used without any particular limitation. As the inorganic pigment, in addition to titanium oxide and iron oxide, carbon black produced by a known method such as a contact method, a furnace method, or a thermal method can be used. Organic pigments include azo pigments (including azo lakes, insoluble azo pigments, condensed azo pigments, chelate azo pigments), polycyclic pigments (for example, phthalocyanine pigments, berylene pigments, verinone pigments, anthraquinone pigments, quinacridone pigments, dioxazines). Pigments, thioindigo pigments, isoindolinone pigments, quinofullerone pigments, etc.), dye chelates (for example, basic dye chelates, acidic dye chelates, etc.), nitro pigments, nitroso pigments, aniline black, and the like.
[0043]
These dye additives are determined depending on the type of dye, the type of solvent component, the characteristics required for the ink, etc., but generally 0.2 to 15 wt%, preferably 0.5 to A range of 10 wt% is preferred.
Preferable examples of the organic solvent include high boiling point and low volatility polyhydric alcohols such as glycerin, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, hexylene glycol, polyethylene glycol, and polypropylene glycol. , Other N-methyl-2-pyrrolidone, 1,3-dimethylimidazolidinone, monoethanolamine, N, N-dimethylethanolamine, N, N-dimethylethanolamine, diethanolamine, Nn-butyldiethanolamine, triisopropanolamine, A water-soluble organic solvent such as a nitrogen-containing organic agent such as triethanolamine can be added within a range in which printing blur does not occur.
Further, if necessary, a thickener, an antifoaming agent, a penetrating agent, a fluorescent whitening agent, an ultraviolet absorber, an antioxidant, a preservative, and the like can be appropriately mixed.
[0044]
(Second Embodiment)
FIG. 3 is a cross-sectional view of a thermal transfer sheet showing a second embodiment of the present invention.
As in the first embodiment, the thermal transfer sheet 20 shown in FIG. 3 includes an image forming layer 2 and an adhesive layer 3 provided on the image forming layer 2 (on the lower side in the drawing). It is the structure provided through the easy peeling means 4 on the top.
However, in the present embodiment, the adhesive layer 3 is composed of a thermal adhesive layer 6 that generates an adhesive force by heating and a temporary fixing layer 7 that generates an adhesive force by applying moisture on the thermal adhesive layer 6. It is a feature.
[0045]
Therefore, when transferring the image forming layer 2 to the adherend 30 such as clothing, an appropriate amount of water is applied to the temporary fixing layer 7 of the adhesive layer 3 as in the case of the first embodiment (see FIG. 1). Apply. By this application of water, the temporary fixing layer 7 starts to function as a layer whose surface or the whole has adhesive force. Thereafter, the temporary fixing layer 7 is overlaid on the adherend 30.
Subsequent operations can be performed in the same manner as in the first embodiment.
[0046]
According to the thermal transfer sheet 20 of the present embodiment, the adhesive layer 3 includes a thermal adhesive layer 6 in which an adhesive force is generated by heating, and a temporary fixing layer 7 in which an adhesive force is generated on the thermal adhesive layer 6 by applying moisture. Therefore, the functions of both layers (the function of finally adhering by heating and the function of temporary fixing by the adhesive force accompanying water application) can be more reliably exhibited.
[0047]
(Third embodiment)
FIG. 4 is a cross-sectional view of a thermal transfer sheet showing a third embodiment of the present invention.
Unlike the first embodiment, the thermal transfer sheet 10a shown in FIG. 4 has a configuration in which the image forming layer 2a is provided on the substrate 1 via the easy peeling means 4.
In the present embodiment, the image forming layer 2a functions as an image holding layer, and further includes a material that generates an adhesive force by heating and a material that generates an adhesive force by applying moisture. .
[0048]
Therefore, when the image forming layer 2a is transferred to the adherend 30 such as clothing, an appropriate amount of water is applied to the adhesive surface side as in the case of the first embodiment (see FIG. 1). By this application of water, the image forming layer 10a starts to function as a layer having an adhesive force on the surface thereof. Thereafter, it is superimposed on the adherend 30.
Subsequent operations can be performed in the same manner as in the first embodiment.
[0049]
According to the thermal transfer sheet 10a of the present embodiment, the image forming layer 2a has an image holding function (ink acceptability), a function that generates an adhesive force by heating, and a temporary fixing function that generates an adhesive force by applying moisture. Therefore, it is not necessary to have a layer structure as in both the above-described embodiments, it is not necessary to consider separation between layers, and the layer formation process is simplified. The
[0050]
The ink receptivity and adhesiveness (adhesive function generated by heating) include vinyl acetate resin, ethylene-vinyl acetate copolymer, ionomer resin, polyethylene, acrylic resin, polystyrene and its polymers, poly Examples include isoprene resin, polypropylene, polyethylene-polypropylene copolymer elastomer, polyamide resin, polyester resin, and polyurethane resin.
Furthermore, as a material that generates adhesive force when moisture is applied, the materials described in the first embodiment can be appropriately used.
[0051]
(Fourth embodiment)
FIG. 5 is a plan view of a thermal transfer sheet showing a fourth embodiment of the present invention.
The thermal transfer sheet 15 shown in FIG. 5 is provided with a temporary fixing portion 9a that generates a temporary fixing adhesive force at the lower sheet end in the drawing. Although not illustrated in the present embodiment, the structure of the temporary fixing portion 9a can be the same as that of the first embodiment, the second embodiment, or the third embodiment described above.
[0052]
For example, when an image is formed by an ink jet printer, the thermal transfer sheet 15 is set in the printer so as to be conveyed in the arrow Y direction shown in FIG. Then, a predetermined image is formed in the image forming area 8.
As a result, the temporary fixing portion 9 a is located in the non-image area 9. (The thermal transfer sheet 15 may be an image on which an image has been formed in advance.)
[0053]
The thermal transfer sheet 15 configured in this manner applies water to the temporary fixing portion 9a when performing image transfer alignment. By doing so, only the sheet edge can be temporarily fixed and adhered to the non-adhesive material, and the alignment of the transferred image can be facilitated. Further, when heating with an iron or the like, the operability is good without causing sheet wrinkles or the like by rubbing in the opposite direction (the arrow Y direction in the figure) from the temporary fixing portion side.
Furthermore, when the temporary fixing is performed again, the adhesive portion is the temporary fixing portion 9a at the end of the sheet, so that the re-adhesion operation can be performed without touching the image forming region 8, and the configuration of the present embodiment The thermal transfer sheet 15 has good operability in the transfer operation.
[0054]
In the present embodiment, as shown in FIG. 5, the temporary fixing portion 9 a may not be formed in the entire region along the short side of the thermal transfer sheet 15, and may be configured to be provided in the sheet corner portion.
[0055]
【Example】
Next, examples of the present invention will be described together with comparative examples, and the thermal transfer sheet according to the present invention will be specifically described.
In describing the following examples and comparative examples, reference is made to FIG. In other words, as shown in FIG. 2, the samples produced in the examples and comparative examples were provided with the thermal transfer sheet 10 on the image forming layer 2 and on the image forming layer 2 (lower side in the drawing). In this configuration, the adhesive layer 3 is provided on the substrate 1 via the easy peeling means 4.
[0056]
Example 1
In Example 1, a base material sheet was prepared by applying a silicon coating on the surface of a high-quality paper (110 kg / m 2) as the base material 1 and further applying an acrylic resin coating as the easy peeling means 4 thereon.
Further, a solution in which ethylene / vinyl acetate copolymer was dissolved in toluene as an image forming layer 2 on the easy peeling means 4 was applied with a bar coater and dried to form 30 μm.
As the adhesive layer 3, an example sample of the thermal transfer sheet 10 was prepared by mixing a mixture of gum arabic and nylon hot melt powder having a particle diameter of 100 μm at a ratio of 1: 9 to 5 g / m 2.
[0057]
(Comparative Example 1)
As Comparative Example 1, a comparative sample of the thermal transfer sheet 10 was prepared in the same manner except that 5 g / m 2 of nylon hot melt powder was applied to the adhesive layer 3 of the base sheet prepared in Example 1.
[0058]
Print samples were printed on the samples of Examples and Comparative Examples of these thermal transfer sheets 10 using an ink jet printer MJ-910C manufactured by Seiko Epson Corporation.
Next, the printed matter of this thermal transfer sheet was placed in a state where water was applied in the example sample, and was left as it was in the comparative example sample, and the printing surface was placed on the fabric piece of 100% cotton so as to adhere to the fabric piece, An iron was placed thereon and heat-pressed at 180 ° C. for 90 seconds to thermally bond the transfer dough piece. Then, the substrate 1 was peeled and removed, and 10 printed designs were formed for each sample.
[0059]
In the thermal transfer sheet 10 of the example sample, it was able to be fixed with almost no deviation from the position of the initial positioning position where the transfer operation was started, but in the comparative example samples, the thermal transfer sheet was heated during heating in all the samples. A shift has occurred.
[0060]
【The invention's effect】
As described above in detail, the thermal transfer sheet according to the present invention is configured such that the temporary tacking adhesive force is generated by the application of moisture. Therefore, when the transfer operation is performed, the transfer is performed after applying moisture to a predetermined region. By bringing the thermal transfer sheet into contact with the position, the thermal transfer sheet can be temporarily fixed at a predetermined position by the adhesive force due to water application, and it is possible to effectively prevent misalignment due to an unexpected external force by a heat source such as an iron or a hot press. And the final fixation can be performed under accurate positioning by the heat of heating.
[0061]
In addition, the thermal transfer sheet according to the present invention has an adhesive layer. When the adhesive layer is configured to generate an adhesive force by heating and to generate an adhesive force by application of moisture, the adhesive layer is simply used. With a very simple layer structure as a layer, both a temporary fixing function and a finally suitable strong fixing function can be produced.
[0062]
In the thermal transfer sheet according to the present invention, when the adhesive layer has a two-layer structure composed of a thermal adhesive layer in which an adhesive force is generated by heating and a temporary fixing layer in which an adhesive force is generated by application of moisture, Adjustment is easy and the different functions of both layers can be more reliably exhibited.
[0063]
In the thermal transfer sheet according to the present invention, when an easy peeling means is provided between the base material and the image forming layer, the base material and the image forming layer are more easily peeled off.
[0064]
Furthermore, in the thermal transfer sheet according to the present invention, when the image forming layer is composed of an ink receiving layer capable of forming an image by an ink jet recording method, the ink does not have adhesiveness before moisture is applied. It can pass through the printer, and various images desired by the user of the thermal transfer sheet can be easily formed. After image formation, it can be accurately transferred without misalignment due to the application of moisture. It is possible to provide an excellent thermal transfer sheet.
[0065]
In the thermal transfer sheet temporary fixing method according to the present invention, when the image forming layer is transferred to an adherend, an image is formed with the ink supplied to the image forming layer before heating, and the moisture is applied to the object. Since the adhesive force that can be temporarily fixed to the adhesive is generated, the thermal transfer sheet can be temporarily fixed at a predetermined position by the temporary fixing adhesive force, and the operability when determining the transfer position can be improved. it can.
[0066]
In the thermal transfer sheet temporary fixing method according to the present invention, when ink is supplied to the image forming layer by an ink jet printer, the temporary fixing adhesive force is automatically generated after the ink is removed from the printer. Image transfer operability can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an intermediate stage of a transfer operation of a thermal transfer sheet according to an embodiment (first embodiment) of the present invention.
FIG. 2 is a cross-sectional view of a thermal transfer sheet which is an embodiment (first embodiment) of the present invention.
FIG. 3 is a cross-sectional view of a thermal transfer sheet which is another embodiment (second embodiment) of the present invention.
FIG. 4 is a cross-sectional view of a thermal transfer sheet according to another embodiment (third embodiment) of the present invention.
FIG. 5 is a plan view of a thermal transfer sheet according to another embodiment (fourth embodiment) of the present invention.
FIG. 6 is a cross-sectional view of a conventional thermal transfer sheet in the middle of the transfer operation.
[Explanation of symbols]
1 Base material
2 Image recording layer
2a Image recording layer (image recording layer having an adhesive function)
3 Adhesive layer
4 Easy release layer
5 Adhesive parts
6 Thermal bonding layer
7 Temporary fixing layer
8 Image formation area
9 Non-image area
9a Temporary fixing part
10, 10a, 20, 15 Thermal transfer sheet
30 Objects to be bonded

Claims (10)

A thermal transfer sheet having an image forming layer having an image holding function and an adhesive layer having an adhesive function with an adherend on a substrate, and capable of transferring the image forming layer to the adherend by heating. There,
Wherein the adhesive layer is applied in water, thermal transfer sheet comprising the adhesive temporary fixing adhesive strength to the adherend may occur.   The thermal transfer sheet according to claim 1, wherein the adhesive layer is a mixture of a component that generates an adhesive force by heating and a component that generates an adhesive force by applying moisture.   2. The adhesive layer according to claim 1, wherein the adhesive layer includes a thermal adhesive layer in which an adhesive force is generated by heating, and a temporary fixing layer in which an adhesive force is generated by applying moisture on the thermal adhesive layer. Thermal transfer sheet. A thermal transfer sheet having an image forming layer having an image holding function and an adhesion function with an adherend on the substrate, and capable of transferring the image formation layer to the adherend by heating,
Wherein the image forming layer is applied in water, thermal transfer sheet comprising the adhesive temporary fixing adhesive strength to the adherend may occur.   The thermal transfer sheet according to claim 4, wherein the image forming layer includes a component that generates an adhesive force when heated and a component that generates an adhesive force when water is applied.   The thermal transfer sheet according to any one of claims 1 to 5, wherein an easy peeling means is provided between the substrate and the image forming layer.   The thermal transfer sheet according to claim 1, wherein the image forming layer is composed of an ink receiving layer capable of forming an image by an ink jet recording method. The thermal transfer sheet according to any one of claims 1 to 7, wherein an end of the sheet is provided with an adhesive that produces the temporary fixing adhesive force.   When transferring the image forming layer to the adherend using the thermal transfer sheet according to any one of claims 1 to 8, an image is formed with ink supplied to the image forming layer before heating. A method for temporarily fixing a thermal transfer sheet, wherein the water content of the ink generates an adhesive force capable of being temporarily fixed to the adherend.   The thermal transfer sheet temporary fixing method according to claim 9, wherein ink is supplied to the image forming layer by an ink jet printer.

Images