JPS6122077B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for producing a short fiber flocked transfer printing sheet which is novel and has great industrial applicability. Conventionally, transfer sheets used to apply short fiber planting patterns by thermal transfer generally include a pile layer made of short fibers (hereinafter referred to as pile) that is planted via a temporary adhesion layer on a base sheet. A simple type is known in which a thermoplastic resin is formed as a pattern on the top. Therefore, when the adhesive layer, which is the pattern in the conventional transfer sheet, takes over the pile and adheres itself to the transferred object, its adhesive force must be at least stronger than the adhesive force of the temporary adhesive layer. , therefore, it is generally applied in a very bulky manner, such as by sprinkling resin powder. On the other hand, the temporary adhesion layer is mainly a water-soluble glue used as a temporary support for the pile to prevent peeling or hair loss during handling, but since the glue film is non-thermoplastic, it cannot be implanted. Since the pile is difficult to pull out, it is necessary to incorporate a considerable amount of thermoplastic resin. The above conventional transfer sheets have the following serious drawbacks. (1) After softening the resin constituting the adhesive layer, especially resin powder, during thermal transfer, it takes a very long time and extremely strong pressure to fuse the powders together and adhere to the transferred object. Therefore, the transferred design pattern is significantly enlarged, making it difficult to express delicately. (2) The adhesive force of the adhesive layer during thermal transfer is inferior to that of the temporary adhesive layer, and the pile does not transfer. Therefore, after the thermal transfer operation, the base sheet must be peeled off only after it has completely cooled down, that is, after the meltable adhesive layer has solidified, which is extremely inefficient. (3) The adhesive layer easily fits into the pile layer and reaches the temporary adhesive layer, which impedes releasability. (4) The removal operation after the base sheet has cooled is quite difficult as the piles are forcibly pulled out from the temporary bonding layer, and many piles remain in the temporary bonding layer.
The surface of the transferred pattern is moth-eaten, and on the other hand, since the pile is reversely planted on the adhesive layer while being subjected to tension, it tends to float near the surface layer. Therefore, the pile with the transferred design pattern cannot withstand friction and pulling. Incidentally, in order to improve the above-mentioned drawbacks of conventional transfer sheets, for example, by changing the thickness or composition of the temporary adhesive layer, the flocking yield may be reduced due to uneven pile planting, or the temporary adhesive layer may be unevenly planted. The layer is transferred to the tip of the pile "upward" and the aesthetic appearance and texture are significantly impaired, making the adjustment extremely complicated and uncertain. As a result of studying these problems, the present inventors have discovered that the entire surface or part of the base sheet 1 is made of a mixture of an emulsion of an adhesive substance and a water-soluble adhesive for preventing tackiness at room temperature, as shown in the drawings. Adhesive layer 2 with printing ink
and forming a release layer 3 covering the entire surface of the adhesive layer 2 with printing ink made of a thermally releasable substance,
This is replaced with a conventional temporary adhesion layer, short fibers are implanted in the release layer 3 to form a pile layer 4, and a colored layer 5 is formed within the pile layer 4 using an arbitrary printing ink. Then, printing ink or powder made of thermoplastic resin is printed or sprinkled on the pile layer 4 according to a desired pattern to form an adhesive layer 6,
Next, if you use a transfer sheet obtained by heat-treating the whole, the short fibers will be easily transferred during thermal transfer and there will be no loss, and the transfer time will be greatly shortened without the need for strong pressure. The inventors have discovered that the substrate sheet 1 can be removed when heated, thereby significantly improving productivity, and obtaining transfers with excellent design sharpness and fastness, thus completing the present invention. Next, the configuration of the present invention will be explained in detail. Examples of the base sheet 1 of the present invention include cellulose paper, synthetic paper, cellophane, nonwoven fabric, cloth, synthetic resin film, and composites thereof.
Particularly preferred is a paper having a porous structure, such as cellulose paper, such as kraft paper, and a paper having some transparency is even more desirable, since the position of the pattern can be easily confirmed from the back side. Next, the adhesive substances in the printing ink constituting the adhesive layer 2 formed on the entire surface or part of the base sheet 1 include natural rubber, isoprene rubber, styrene-butadiene rubber, butyl rubber, polyisobutylene, chloroprene rubber, Resins with rubber elasticity such as nitrile rubber and silicone rubber, mixtures of resins with rubber elasticity and adhesion improvers such as petroleum resins, rosins, and ester resins, or butyacrylate, 2-ethylhexyl acrylate, etc. and methacrylic acid. , copolymers with vinyl acetate and the like. The adhesive substance is in the form of a solvent solution or an emulsion, and if necessary, is mixed with a thickening agent to prepare a printing ink. They are selected in consideration of the adhesive strength of the releasable substance, adhesive strength under heat, stability, etc., and are used alone or as a mixture. The adhesive layer 2 does not necessarily have to be highly adhesive at room temperature; if it is highly adhesive at room temperature, it will warp and become difficult to handle. In short, the function or purpose of the adhesive layer 2 is to exert a strong adhesive force during thermal transfer and to take away the releasable substance, thereby preventing the releasable substance from remaining on the pile as much as possible. There it is. Accordingly, the printing ink used in the present invention shall consist of a mixture of an emulsion of a tacky substance and a water-soluble thickener that prevents tackiness at room temperature. Next, the release material for the release layer 3 formed covering the entire surface of the adhesive layer 2 includes, for example, beef tallow, lanolin, carnauba wax, paraffin, naphthalene, stearyl alcohol, stearic acid, methylene bisstearylamide, Heat-softening or heat-melting solids such as phthaimide, toluenesulfonamide, acetanilide, adipic acid, methyl oxybenzoate, aluminum stearate, benzotriazole, polyethylene glycol, urea, acetoguanamine, and fluorine-containing resins,
Examples include silicone resins, etc., or non-volatile liquids such as dioctyl phthalate, linseed oil, rapeseed oil, polypropylene glycol, butyl stearate, glycerin, etc. , thermoplastic polymer compounds such as xylene resin, sulfamide resin, polyolefin resin, ethylene vinyl acetate copolymer resin, polyacrylic acid ester resin, or ethyl cellulose, hydroxypropyl cellulose,
Printing ink is made by mixing thickeners such as methylcellulose, carboxymethylcellulose, chitosan salts, modified guar gum, etc., and extender pigments such as kaolin, bentonite, calcium carbonate, anhydrous silicic acid gel, barium sulfate, etc. These are preferably used in solvent solutions, emulsions, etc. That is, if the release layer 3 is made of only the above-mentioned release material, the release property at room temperature and heat is too strong, which impairs the fixation of the pile described later, and it is unsuitable because it tends to transfer to the tip of the pile. By appropriately selecting and using the adhesiveness of the thermoplastic polymer compound used in combination to increase pile retention while decreasing the adhesiveness with the glue or extender pigment used in combination, it is possible to achieve favorable peelability when heated. It can be shown and done. In the present invention, a pile is implanted in the release layer 3 immediately after printing to form the pile layer 4. The pile may be colored or non-colored, such as cellulose-based, synthetic fiber-based, or mineral fiber-based, and may be of various lengths and diameters,
The hair transplantation is performed using a known hair transplantation method. Then,
After the formation of the pile layer 4, a colored layer 5 is applied within the pile using printing ink. The pigments constituting the printing ink include organic pigments such as insoluble monoazo, polyazo, phthalocyanine, dioxazine, quinacridone, isoindolenine, and indanthrene, iron oxide, ultramarine blue, aluminum cobalt oxide, titanium yellow, iron black, etc. Inorganic pigments such as aluminum powder, mica, surface-treated titanium oxide, gloss and iris pigments such as glitter, white pigments such as titanium white, zirconium white, zinc white, barium sulfate, aluminum silicate, and dye lakes and dispersions. dye,
Examples include cationic dyes, oil-soluble dyes, daylight fluorescent dyes, temperature-sensitive coloring substances, photosensitive coloring substances, phosphorescent/noctilucent dyes, and microspheres, and one or more of these may be used as desired. The colors are expressed. The coloring agent is generally used as any ink containing a synthetic resin as a fixing agent, and is processed by a known printing method. It is also possible to sprinkle, smear, imprint, or spray the powder or slurry of the coloring agent, and then cover it with a reinforcing resin or the like. In the present invention, the main purpose of the colored layer 5 is to decorate the pile, and since the pile is reversed after transfer, it is actually important to penetrate deeply into the pile layer 4. Next, the adhesive layer 6 is formed on the pile layer 4 containing the colored layer 5 using a printing ink made of a thermoplastic resin according to a desired pattern. Examples include adhesive components similar to those used in layer 3, polyurethane resins, polyester resins, polyamide resins, polybutyral resins, amino acid resins, natural rubber, synthetic rubber, etc., and solvent solutions of one or more of these It is used in the form of an emulsion, a non-aqueous emulsion, a dispersion, a plastisol, etc., and it is also used as a powder by sprinkling. By the way, the adhesive layer 6 melts and softens during thermal transfer and adheres to the transferred object 7, and also takes the pile from the base sheet 1 in a desired design pattern and holds it adhesively, so it has a large influence on the final fastness. Therefore, it is preferably applied in a very bulky manner. In the present invention, the ink of each of the above-mentioned adhesive layer 2, release layer 3, colored layer 5, and adhesive layer 6 contains at the same time conventional chemicals such as a surfactant, an antioxidant, a catalyst, and a crosslinking agent. , anti-settling agents, fragrances, ultraviolet absorbers, solvents, etc., may be used in combination without departing from the gist of the present invention. Finally, in the present invention, after the adhesive layer 6 is treated, the entire sheet is heat treated. The heat treatment may be performed by any conventional method,
Treatment at about 80 DEG to 200 DEG C. for 0.5 to 2 minutes is preferred, resulting in the following changes. (a) As the adhesive substance on the base sheet 1 melts and softens and fixes most of the melted peelable substance, the peelability of the tips of the piles buried in the peeling layer 3 is extremely good. (b) The adhesive component of the colored layer 5 is cured in advance, and the pile can be colored with good fastness. (c) The adhesive layer 6 softens and melts to form a continuous resin film, and especially in the case of powder, the film is formed in advance, so the adhesion to the transfer object 7 and the fastness are significantly improved. The objects 7 to be transferred to which the sheet of the present invention is applied include fabrics, ceramics, glass, wood, metals, synthetic resin molded objects, and paper, and the method of transferring the sheet to these materials includes the following: The surface of the adhesive layer is brought into contact with the object to be transferred 7, and the transfer temperature is approximately 5 to 5 degrees at 80 to 200 degrees Celsius using a normal transfer operation such as an iron or a hot press.
It is carried out under relatively low pressure for 30 seconds. In this way, a sharp design pattern in which the pile stands upright with a remarkable three-dimensional effect is revealed on the transferred object 7 with excellent fastness. The base sheet 1 after transfer peels off with extremely low resistance even when heated, and almost no residual pile is observed in the patterned areas. Next, the effects of the present invention will be listed. (1) By using the sheet of the present invention, thermal transfer operations can be performed at extremely low pressure and in a short time, allowing delicate expression of designs and greatly improving commercial value. (2) Due to the presence of the release layer, the sheet of the present invention can easily take away the pile during thermal transfer without being inferior to the adhesive force of the temporary adhesive layer of conventional sheets. It is now possible to peel off the sheet, significantly improving production efficiency,
In addition, the pile does not become tensile due to forced "pulling out" such as peeling off after cooling, and the fastness of the transferred material is not impaired. (3) In the sheet of the present invention, the presence of the colored layer 5 not only adds decorativeness to the pile, but also differs from the conventional sheet in which an adhesive layer with a pattern is formed on the top surface of the pile layer on the temporary adhesive layer. As mentioned above, the adhesive layer easily fits into the pile layer and reaches the temporary bonding layer, which impedes the peelability, whereas the colored layer 5 is easily inserted into the pile layer 6 and the pile layer 4. By being interposed between the adhesive layer 3 and the adhesive layer 3, there is an advantage that the substance of the adhesive layer 6 is prevented from entering the release layer 3, and the function of the release layer 3 is maintained. (4) The sheet of the present invention has the above-mentioned adhesive layer 2 and release layer 3.
With this structure, there is almost no pile remaining on the base sheet peeled off after heat treatment, and therefore the transfer surface is smooth, aesthetically pleasing, and economical. (4) By using the sheet of the present invention, anyone can produce clear and sharp short fiber flocked prints. Next, the present invention will be specifically explained with reference to Examples. Example 1 The entire surface of pure white paper (80 g/m ² ) contains 30% of a sticky substance of an emulsion polymer consisting of 92% 2-ethylhexyl acrylate, 5% acrylonitrile, 3% acrylic acid, and 3% vinyl propionate. 15 parts by weight (hereinafter, parts by weight are simply referred to as "parts") were mixed with an emulsion of 3 parts of methylcellulose, 50 parts of mineral turpentine, and 32 parts of water, and printed using a screen mold (70 mesh) on the entire surface. After drying, an adhesive layer was applied. Next, a viscous liquid consisting of 5 parts of an amide wax emulsion, 5 parts of a silicone wax emulsion, 10 parts of an ethylene-vinyl acetate copolymer emulsion, 5 parts of ammonium polyacrylate, and 75 parts of water was applied onto the adhesive layer. Using the same plate, print overlapping to provide a release layer, and then print on white rayon pile (1.5d,
0.7mm) was planted uniformly and dried to form a pile layer. Next, 98 parts of Binder 200R (trade name, printing paste containing polyacrylate emulsified adhesive for pigment resin printing), 35% phthalocyanine blue dispersion 1
Screen printing was performed with a blue printing ink consisting of 1 part of ammonium nitrate using a screen plate (80 mesh, but a cutting die that can be enlarged by 1 mm from the outer circumference of the polka dot pattern described later), sufficiently penetrated into the pile clump, and dried. . Furthermore, using a screen plate (50 meshes) with a continuous pattern of polka dots of 10 mm diameter and 6 mm interval so as to match 1 mm inside the outer periphery of the blue printed part, Matsuminsol F23C (trade name, acrylonitrile emulsion polymer for Frotzky textile printing) was used. ) A printing ink consisting of 98 parts and 2 parts of 25% ammonia water is printed in bulk with a double squeegee, dried,
Finally, heat treatment was performed at 130°C for 2 minutes to obtain a flocked transfer printed sheet. Using the sheet, put it in contact with paper and polyester blended knit cloth (70:30), and press it in a pot press machine at 160%.
After heat treatment at ℃, 25 seconds, 200g/ ^cm2 , approx.
After a few seconds, the base sheet was peeled off from the cloth when it was warmed up. Thus, on cotton or polyester knit cloth,
A flocked transfer printing pattern with a vivid blue color and a diameter of 10 mm, full of three-dimensional effect, was revealed. In addition, almost no pile layer remained in the polka dot area of the base sheet after peeling off, and the transferred pattern showed extremely good fastness in terms of light fastness, abrasion resistance, and washing resistance. The following experiment was conducted for comparison with the present invention.
Performance was confirmed using the same transfer process. The results are shown in Table 1. (A) A transfer sheet was prepared in the same manner as described above except that the adhesive layer of this example was not used. (B) Without using the adhesive layer of this example, and using a printing ink excluding wax from the printing ink constituting the release layer of this example, that is, a similar to conventional temporary adhesive ink, A transfer sheet was created in the same manner as in the example. (C) A transfer sheet was prepared without performing the final heat treatment in the transfer sheet manufacturing process of this example.

[Table] As shown in Table 1 above, the present example was found to have a significant effect compared to the comparative example. Example 2 A contour screen (70 g/m ²
40 parts of natural rubber latex (solid content 25%), Extender OS (product name,
Diluted paste for pigment resin printing using petroleum emulsion. ) 40 copies,
Printing with a printing ink consisting of 18 parts of a 10% polyvinyl alcohol aqueous solution, 1 part of glycerin, and 1 part of urea,
An adhesive layer was applied. Next, using a screen plate (90 meshes) that can be enlarged 0.5 mm outward from the outline of the pattern, apply 20 parts of 20% polyethylene wax emulsion and binder 50RL (trade name, containing 10% solid content of polyacrylic acid ester). emulsion extender
Pigment printing adhesive mixed with OS) 65 parts, Aerosil (trade name, silicic anhydride) 2 parts, lanolin 1 part,
Emulgen A-60 (trade name, nonionic emulsifier)
After covering the adhesive layer with a printing ink consisting of 1 part of 1 part and 11 parts of 5% Fine Gum HESS (trade name, carboxyethyl cellulose), it was printed on a white nylon pile (1.5 d, 0.5 mm) without drying. was planted and dried to form a peel layer and a pile layer in this order. Next, on the pile layer, use a screen plate (40 meshes) that can be reduced by 0.5 mm from the pattern used for the adhesive layer, and add 0.5 parts of Diaresin PTR-60 (trade name, anthraquinone red disperse dye) and an extender.
A printing ink consisting of 90 parts of OS and 9.5 parts of binder 200R is printed, and is sufficiently penetrated into the pile plexus to form a colored layer.
Sprinkle a mixed powder of 50% Diaamide (trade name, nylon resin) and 50% Vylon (trade name, polyester resin), and after drying, remove the unfixed powder by suction.
Finally, hot air treatment was performed at 180°C for 15 seconds to obtain a transfer printed sheet. Using the transfer printing sheet, place it in contact with vinyl chloride leather and heat it with an iron at 170℃ for 20 minutes.
After performing thermal transfer for a second, cooling for one minute and peeling off the base sheet, most of the sheet has already peeled off from the vinyl leather and can be easily removed.
In addition, a bright red alpha alphabet flocked pattern with a sharpness of 9 mm in diameter was obtained, and the color fastness of the transferred product was good. For comparison, in the case where the heat treatment involved in sheet preparation of this example was not performed, the transfer time was approximately twice as long, and the outline of the design was enlarged, which was insufficient. Further, in this example, although it was possible to peel off the base sheet at a warm temperature after thermal transfer, the color was a little pale and the dyeing was insufficient. In this example, when a similar transfer sheet was prepared with only a release layer without an adhesive layer and the transfer operation was performed, the pile peeled off from the base sheet, which was good, but there was no peeling on the pile surface. The agent components rose up, impairing the texture and aesthetic appearance, and the color fastness to abrasion was also poor.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view showing one example of a short fiber flocked transfer printing sheet obtained by the method of the present invention, and FIG.
The figure is an enlarged cross-sectional view showing a mode in which the transfer printing sheet shown in FIG. 1 is used to transfer onto an object to be transferred. DESCRIPTION OF SYMBOLS 1... Base sheet, 2... Adhesive layer, 3... Peeling layer, 4... Pile layer, 5... Colored layer, 6... Adhesive layer.

Claims (1)

[Claims] 1. An adhesive layer 2 is formed on the entire surface or part of the base sheet 1 using a printing ink consisting of a mixture of an emulsion of an adhesive substance and a water-soluble adhesive for preventing tackiness at room temperature, and the entire surface of the adhesive layer 2 is A peeling layer 3 is formed using printing ink made of a thermally peelable substance, and short fibers are planted in the peeling layer 3 to form a pile layer 4.
A colored layer 5 is formed in the pile layer 4 using an arbitrary printing ink, and then printing ink or powder made of thermoplastic resin is printed or sprinkled on the pile layer 4 according to the desired pattern. 1. A method for producing a short fiber flocked transfer printing sheet, which is characterized in that an adhesive layer 6 is formed by attaching the adhesive layer 6, and then the whole is subjected to a heat treatment.