JPH0241429B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a novel transfer printing sheet, which allows a precise and sharp short fiber flocked pattern to be applied onto a subject by thermal transfer.

Conventionally, transfer printing sheets used to apply short fiber patterns by thermal transfer are short fiber pieces (hereinafter referred to as piles) that are planted in a temporary bonding layer on a base sheet.
Although it is known that a thermoplastic resin can be formed into a desired pattern on a short fiber layer, it has the drawback that it is still difficult to obtain a precise pattern.

That is, since the thermofusible resin that controls the solidity of the transferred design is extremely bulky and must be applied in large quantities, generally a desired design pattern is first formed using a binder, and then the resin powder is applied. However, it is impossible to precisely print the binder on an essentially uneven pile surface, and therefore, it is impossible to precisely print the binder on a pile surface that is essentially uneven. The design pattern formed by thermal transfer on the transfer target using this method inevitably lacks precision.

In addition, resin powder scattering tends to be uniformly applied to the flocked layer in non-design areas, making it extremely difficult to remove, and even if methods such as vibration, spraying, suction, and brushing are combined, it is still insufficient. Moreover, if it is not completely removed, there are inconveniences such as part of the necessary powder on the design being peeled off.

A method of printing by mixing thermoplastic resin powder and a binder is also known, but it is clear that the presence of the resin powder deteriorates the printing suitability for pile surfaces, and The design pattern formed by thermal transfer also becomes unclear.

On the other hand, other similar sheets include attaching a film-like thermoplastic resin to the pile planting surface and cutting out the desired design, or planting piles on the film. However, due to the properties of the molds, etc., in all of these methods, only the outline of the pattern can be obtained, and a precise pattern cannot be expected at all.

As a result of various studies on the shortcomings of the above-mentioned conventional sheets, the inventors of the present invention have created a pattern using printing ink made of thermofusible resin on the entire surface or part of the removable base sheet 1, as shown in the drawing. The patterned layer 2 of the patterned sheet 3 formed with the layer 2 is brought into contact with the surface of the flocked sheet 7, which is formed by planting a short fiber layer 6 on the entire surface of the base sheet 4 via a temporary bonding layer 5. By transferring the design pattern layer 2 of the design sheet 3 onto the short fiber layer 6 of the flocked sheet 7 by applying pressure or the like, and then peeling and removing the base sheet 1 of the design sheet 3, an extremely precise design pattern can be created. They have discovered that it is possible to obtain a thermal transfer sheet 8 that makes the images visible, and have thus completed the present invention.

Next, the configuration of the present invention will be explained in detail with reference to the drawings showing one embodiment.

The base sheet 1 having releasability in the pattern sheet 3 used in the method of the present invention may be cellulose paper treated with any release agent such as oil, wax, polyethylene resin, silicone resin, fluorine rubber, or synthetic paper. paper, cellophane, non-woven fabric,
Examples include synthetic resin films and composites thereof to which cloth or thermofusible resins, which will be described later, are difficult to firmly adhere. Particularly suitable are paper, synthetic resin films, and other materials with excellent smoothness.

The thermofusible resins constituting the printing ink for applying the pattern layer 2 on the entire surface or part of the base sheet 1 include petroleum resins, sulfamide resins, ketone resins, polyolefin resins, vinyl chloride resins, and Acrylic resins, vinyl acetate resins, polyurethane resins, polyamide resins, polyester resins, etc., and their mutual cocondensation polymers, as well as rosin resins, dammar rubber, polybutyral resins,
Examples include ethyl cellulose and synthetic rubber, and printing inks are prepared using solvent solutions, emulsions/dispersions, plastisols, etc. of these. Incidentally, one or more of these resins may be used, and if necessary, a drying regulator, which is a usual printing aid, may be added.
Pigments, plasticizers, catalysts, etc. are used together with thickeners, surfactants, solvents, etc.

The printing ink allows precision printing to be easily performed on the base sheet 1 having excellent smoothness, and the required printing layer can also be adjusted as appropriate.

Further, depending on the case, it is extremely easy to scatter the same kind of thermofusible resin powder onto the printed pattern surface and to remove the excess powder in that case.

In this way, the pattern layer 2 of the present invention is fundamentally different from the conventional method in which it is formed directly on the flocked layer, and is precisely formed on a smooth surface using a normal printing method such as intaglio printing or screen printing. It is.

Next, as the base sheet 4 in the flocked sheet 7 of the present invention, cellulose paper, synthetic paper, cellophane, etc. are suitable, as with the base sheet 1, and surface-treated products of these can also be used. The components of the temporary adhesive layer 5 applied to the entire surface of the base sheet 4 are generally thermoplastic elastic resins such as vinyl acetate resin, ethylene/vinyl acetate copolymer resin, polyacrylate copolymer resin, etc. Preferably, along with these emulsions/dispersions or solvent solutions, if necessary, surfactants, thickeners, extender pigments, drying regulators, fats and oils, etc. are used to form a slurry, and the slurry is coated using known methods. An appropriate amount of adhesion is applied using a printing method. After the temporary adhesion layer 5 is attached, a pile is planted by a commonly known electrodeposition method without drying to form a short fiber layer 6.

Examples of the pile forming the short fiber layer 6 include cut pieces of monofilament bundles such as rayon, nylon, polyester, and polyacrylic fibers, and those made of cotton powder with a length of 0.3 to 1.0 mm and a diameter of 1.0 to 1.5 denier. However, it is not limited to these, and may be appropriately determined depending on the properties of the intended transfer material, usage, etc.

The pile in the present invention may be colored in advance, or may be colored at any time after the short fiber layer 6 is formed, and furthermore, a pattern may be formed arbitrarily.

In the method of the present invention, the surface of the short fiber layer 6 of the flocked sheet 7 thus obtained is brought into contact with the design layer 2 of the design sheet 3, and a pressurizing operation is performed, and if necessary, further heating is performed. The pattern layer 2 on the pattern sheet 3 is easily transferred to the short fiber layer 6.
That is, the design sheet 3 having the pattern layer 2 on the base sheet 1 is used to apply pressure transfer to the flocked sheet 7 having the short fiber layer 6 on the base sheet 4, and then the base sheet 1 is peeled off. By removing it, the thermal transfer sheet 8 of the present invention having the pattern layer 2 on the base sheet 4 via the short fiber layer 6 is obtained.

The pattern layer 2 of the pattern sheet 3 may be transferred to the flocked sheet 7 when the printing ink is wetted, or may be transferred to the flocked sheet 7 after drying and heat treatment. .

The objects 9 targeted by the thermal transfer sheet 8 obtained by the method of the present invention include cloth, wood, paper, nonwoven fabric,
Synthetic resin molded products, composites thereof, etc. can be mentioned, and the transfer method includes bringing the two sides of the pattern layer of the thermal transfer sheet 8 of the present invention into contact with the subject 9,
The base sheet 1 is removed by a conventional transfer operation such as an iron, a hot press, etc., generally at 80 to 200 DEG C. for 5 to 30 seconds under pressure.

In this way, an extremely precise pattern appears on the object 9 with remarkable sharpness and excellent fastness.

Next, the effects of the present invention will be listed.

(1) By using the sheet according to the present invention, the flocked transfer pattern can be made fine and sharp,
Combined with the three-dimensional effect of the design, the product value is significantly increased.

(2) In the method of the present invention, the pattern layer 2, which is an adhesive layer to the subject 9, is not formed directly on the pile but is applied on the smooth releasable base sheet 1, so that any precise pattern can be formed. can get.

(3) The method of the present invention has the drawback that the printing ink for the pattern layer used in conventional sheet production must be water-based, but the method of the present invention has the disadvantage that it is essential that the printing ink for the pattern layer is water-based. Various types of oil-based inks can be used, and therefore the range in which resins that are advantageous in terms of fastness and the like can be selected is greatly expanded.

(4) When powder is sprinkled in the manufacturing process of the sheet according to the present invention, there is no conventional problem of immersion of resin powder into gaps between piles and separation of a mixture of removed resin powder and fallen piles. .

(5) In the present invention, two types of sheets, the pattern sheet 3 and the flocked sheet 7, are prepared, and anyone can make the thermal transfer sheet 8 by using the required amount of both sheets 3 and 7 whenever necessary. Unlike conventional sheets, there is no need to unnecessarily prepare a thermal transfer sheet as a final product, making it economical and safe.

Next, the present invention will be specifically explained with reference to Examples.

Example 1 A base sheet is high-quality paper (50 g/m ² ) on which polyethylene wax and ethylene-vinyl acetate copolymer resin are applied over the entire surface 2.5 mm larger than the outer periphery of the pattern outline described below, and on the base sheet, A line with a diameter of 0.3 mm, with a circle with a diameter of 20 mm on the outside, and 2 mm each on the inside.
Using a screen plate (35 meshes) with a fine line concentric circle pattern consisting of multiple inner circles that reduce to an interval, 30 parts by weight of Diamid 450P-1 (trade name: nylon resin) (hereinafter, parts by weight is simply abbreviated as parts). ), 17 parts of Ultrason 6150H (trade name, vinyl acetate resin),
2 parts of Vissurf #1400 (trade name, viscosity modifier),
1 part of Emulgen A-60 (trade name, emulsifying dispersant),
After printing with a printing ink consisting of 20 parts of mineral turpentine and 30 parts of water to form a pattern layer,
After drying, a patterned sheet was obtained. In addition, on high-quality paper (130 g/m ² ) whose surface was separately calendered, 5 parts of Yodozol LD-1009 (trade name, acrylic acid ester resin), 5 parts of urea, 10 parts of polyethylene glycol, 1 part of bentonite, 5% 5 parts of pectin aqueous solution, 2 parts of D・O・P, 2 parts of Emulgen A-60,
Printing ink consisting of 30 parts of mineral turpentine and 40 parts of water was printed using a full screen screen plate (90 mesh), and immediately printed on black dyed rayon pile (0.5 mm,
1.5d) was electrostatically implanted and dried to obtain a flocked sheet.

Next, the printed surfaces of both of the above sheets were brought into contact with each other, and a hot press was applied at 180°C for 5 seconds to give a pressure of 200 to 250 g/cm ² ).
After crimping and cooling, the base sheet of the pattern sheet was peeled off.

In this way, a thermal transfer sheet was obtained in which a pattern of concentric thin lines at equal intervals of 0.3 mm was clearly transferred onto the flocked layer.

The sheet was placed in contact with a cotton knit white cloth, and after heat treatment at 150°C for 30 seconds at 300 g/cm ² ) using a hot press machine, the sheet was peeled off and the cotton knit white cloth had extremely sharp flocking. A pattern of concentric black lines appeared.

The color fastness and flexibility of the design on the transfer cloth were also good.

For comparison with this example, although it was possible to directly print on the flocked sheet using the printing ink used for the pattern sheet using the same screen plate using the conventional method, the fine lines were clogged and caused to break. Not only that, but on some printed surfaces, the lines are crushed and enlarged, etc.
Only a very blurred transfer sheet was obtained, which was significantly different from the present example.

Example 2 Pure white paper (65g/
m ² ), 50 parts of Nikazol CL-303 (trade name, acrylic ester adhesive resin), Emulgen A-
60 1 part, Vissurf S (trade name, thickener) 1 part,
Sumitex Resin M-3 (trade name, melamine resin) 3 parts, Catalyst #3000 (trade name, inorganic acid salt)
A printing ink consisting of 1 part, 20 parts of mineral tarpen, and 24 parts of water is printed on a screen plate (90 meshes) with an alpha alphabet character pattern consisting of thin lines at equal intervals of 0.2 mm to obtain a design sheet, and the design of the design sheet is Without drying the pattern layer, the printed surface was then brought into contact with the implanted surface of the flocked sheet provided with the flocked layer used in Example 1, and subjected to a pressure treatment of 350 g/cm ² ,
After standing for a day and night, the base sheet of the pattern sheet was peeled off and removed.

In this way, a thermal transfer sheet was obtained in which a 0.2 mm thin alpha abet pattern was uniformly and sharply transferred onto the implanted surface of the flocked sheet.

The sheet was placed in contact with a white cotton gauze cloth and treated with a thermal calendar at 120°C for 2 seconds at 300-500g/cm ² , followed by further heat treatment at 140°C for 5 minutes, and then the sheet was peeled off. Then, a flocked alpha abet black pattern consisting of sharp thin lines of about 0.2 mm appeared on the cotton white gauze.

For comparison with this example, when the printing ink used on the pattern sheet was directly printed on the flocked sheet, the lines were blurred or broken and were extremely unclear.

Example 3 On a polyester film (100μ), 50 parts of Zeon #121 (trade name, vinyl chloride resin), DOP 30
part, DOA 16 parts, LTB-32B (trade name, stabilizer)
A printing ink consisting of 2 parts of aluminum stearate and 2 parts of aluminum stearate is printed on a screen plate (120 meshes) with a star pattern of 30 mm in diameter at dense points of 1 mm in diameter, and then over the entire surface with Byron GM-902P (trade name). ,
After 5 minutes, the powder adhering to the non-printing area of the sprinkled surface was lightly removed by exhausting compressed air, and the sheet was heat-treated at 150°C for 2 minutes to obtain a pattern sheet. Ta. On the other hand, 50 parts of Binder 50R (trade name, adhesive for pigment printing) was applied to a flocked sheet in which white rayon piles (0.3 mm, 1.5 d) were implanted in place of the black dyed rayon piles in Example 1. , NEOLETSUDO MFG (trade name, pigment for printing) 3 parts, mineral turpentine 30 parts and water 27
A star-shaped solid pattern screen plate (70
After drying, the star-shaped outline of the design sheet was overlaid correctly within the outline of the flocked sheet so that they overlapped, and the printing was carried out at 150°C for 5 seconds at 250 g/cm ²
After applying a hot iron, the base sheet of the pattern sheet was peeled off.

In this way, a thermal transfer sheet was obtained on which a sharp star-shaped pattern consisting of fine dots of about 1 mm was transferred onto the flocked layer.

The sheet was placed in contact with a polyester decine white cloth, heated with a hot iron at 250 g/cm ² at 140°C for 20 seconds, cooled, and then peeled off to remove an extremely sharp 0.1 mm Diameter consisting of fine points
A polyester decine transfer printed fabric with a 30 mm red stippling star-shaped flocked pattern was obtained, and its fastness was also extremely excellent.

For comparison, when printing directly onto the flocked sheet of this example using the printing ink used for the pattern sheet of this example, the DOP etc. in the ink oozes out of the pattern, resulting in an accurate dot pattern. However, when the powdered resin was sprinkled, it significantly penetrated into the implanted layer and was difficult to remove, and the transferred pattern was completely indistinct.

Similarly, for comparison, printing ink made of aqueous polyacrylic acid ester emulsion was directly printed on the flocked sheet of this example, and then bead-shaped nylon resin powder (100 mesh) was sprinkled to form star-shaped fine particles. When trying to obtain points, powder removal is relatively good because the powder particle size is coarse, but the desired fine points cannot be obtained, and as a result of the powder adhering in a zigzag pattern around the pattern outline, the fine points are large and small. It was irregular and significantly lacked sharpness.

Example 4 The pattern printing ink of Example 1 was printed using the screen plate of the same example on kraft paper (140 g/cm ² ) impregnated with parafine wax and ethylene vinyl acetate copolymer resin, and then dried. Using a full-screen screen plate (150 meshes) on the top surface of the design, apply 2 parts of PTB-76 (trade name, blue pigment for dye sublimation transfer) and PTY-51 (trade name, the same yellow pigment as mentioned above).
1 part, Gelol D (trade name, thixotropic agent)
2 parts, 1 part of Sorgen #30 (trade name, surfactant),
A printing ink consisting of 10 parts of Eslec BM-2 (trade name, polybutyral resin), 42 parts of isobutyl alcohol, and 42 parts of ethyl alcohol was used for printing.
On the other hand, the temporary adhesion layer printing ink used in Example 1 was printed on the entire surface of kraft paper (140 g/m ² ), and immediately printed on polyester white pile (0.3 g/m 2 ) without drying.
mm, 1d) was electrostatically flocked and dried.

Next, the above-mentioned two sheets were brought together and heat-treated at 160° C. for 10 seconds at 250 g/cm ² using a hot press machine, and the base sheet of the pattern sheet was peeled off.

In this way, a thin wire of about 0.3 mm is placed on the planting surface with a diameter of 20 mm.
A thermal transfer sheet was obtained in which the concentric circular pattern was clearly transferred. Then, the sheet was brought into contact with a white triacetate velor cloth and hot pressed at 185°C for 25 seconds at 100 g/cm ² to remove the sheet. The green concentric pattern was accurately transferred with 0.3mm lines.

[Brief explanation of drawings]

Each of the drawings shows one embodiment of the present invention, and FIGS. 1 and 2 are enlarged sectional views of a patterned sheet and a flocked sheet, respectively, and FIG. 3 is an enlarged sectional view of a patterned sheet and a flocked sheet using FIG. 4 is an enlarged sectional view of the thermal transfer sheet obtained as shown in FIG. 3, and FIG. 5 is an enlarged sectional view showing how the thermal transfer sheet of FIG. FIG. In the drawing, 1 is the base sheet, 2 is the pattern layer,
3 is a pattern sheet, 4 is a base sheet, 5 is a temporary adhesive layer, 6 is a short fiber layer, 7 is a flocked sheet, 8 is a thermal transfer sheet, and 9 is a subject.

Claims (1)

[Claims] 1. A pattern layer 2 of a pattern sheet 3 formed by forming a pattern layer 2 on the entire surface or part of a base sheet 1 having peelability using printing ink made of a thermofusible resin. is in contact with the surface of the flocked sheet 7, which is formed by planting the short fiber layer 6 on the entire surface of the base sheet 4 via the temporary bonding layer 5, and the short fiber layer 6 of the flocked sheet 7 is attached by applying pressure or the like.
A method for producing a thermal transfer sheet, which comprises transferring the pattern layer 2 of the pattern sheet 3 onto the top, and then peeling and removing the base sheet 1. 2. The method for producing a thermal transfer sheet according to claim 1, wherein the short fiber layer 6 of the flocked sheet 7 is colored. 3. The method for producing a thermal transfer sheet according to claim 1, wherein a pattern is applied to the short fiber layer 6 of the flocked sheet 7.