KR100492220B1 - the method of producing dye diffusion thermal transfer ribbon - Google Patents

Abstract

The present invention relates to a method for manufacturing a sublimable thermal transfer ribbon, wherein an ink composition including a binder and a solvent is applied between a dye layer 10 having a yellow, magenta or cyan dye and a base material 60 using a gravure printing method. In the method for producing a sublimable thermal transfer ribbon in which an anchor layer is provided, the dye layer is composed of two layers (10, 20) and is the same as the resin of the anchor layer (70) in the lower dye layer (20) in contact with the anchor layer. Alternatively, the lower dye layer 20 is provided in an ink composition containing 5 to 50% by weight of the total resin weight so as to have a dry coating amount of 0.05 to 1.50 g / m 2, thereby obtaining excellent adhesion and obtaining a high density printed image. Provided are methods for making a sublimable thermal transfer ribbon.

Description

The method of producing dye diffusion thermal transfer ribbon

The present invention relates to a method for producing a sublimable thermal transfer ribbon suitable for use in a printing apparatus that provides an image having excellent resolution and image quality, such as a video printer. In detail, the dye layer coating film is easily formed and the quality of the printed image is excellent. It is to provide a method for producing a sublimable thermal transfer ribbon.

With the rapid development of the social structure and the high standard of living, the demand for printing devices with photographic images from the conventional method of printing with only letters or symbols has increased in the industrial field as well as in the final consumer class. Along with this, a method of printing photographic images has begun to be developed.

FIG. 2 is an example conceptually showing the general structure of a sublimable thermal transfer ribbon capable of printing photographic images and letters or codes.

Sublimation thermal transfer ribbons generally have a heat-resistant layer 50 on one side of a thermoplastic resin substrate 60, such as a polyethylene terephthalate film, to prevent thermal fusion between the substrate 60 and the heat head and the substrate 60. The other side of has the basic structure which provided the sublimable dye layer 10 containing 1 or more types of sublimable dyes.

The dye layer 10 is composed of a sublimable dye and a binder resin, and the sublimable dye used is three colors of yellow, magenta, and cyan. As a yellow dye, Macrolex Yellow 6G, MS Yellow VP, Kayaset Yellow AG, etc. are used, and magenta dyes include MS Magenta VP and Kaya. Jetset 130 (Kayaset Red 130), Waxline Red YP-FW (Waxoline Red YP-FW), MS Red G (MS Red G), etc. are used as cyan dye, Waxline Blue AP-FW (Waxoline Blue AP) -FW), Kayaset Blue 714, MS Blue 100 and the like are used.

In addition, the binder used in the dye layer 10 is a thermoplastic resin which improves the heat resistance of the coating film and allows the dye in the coating film to be easily transferred to the aqueous paper. Ethyl cellulose, polyvinylbutyl al, polyvinyl acetal, poly Vinyl chloride resins have been commonly used.

As the substrate 60 used in the sublimable thermal transfer ribbon, plastic films such as polyethylene terephthalate, polyamide, polyvinyl chloride, polyethylene, polyimide, polysulfone, and polycarbonate are used, and have a thickness of 3 to 20 μm. Polyethylene terephthalate films have been mainly used.

In addition, the thermal transfer ribbon is provided with a hot melt ink layer 30 according to the product and the application to which the thermal transfer ribbon is applied, and a protective layer 40 for protecting a printed image is also provided.

For example, in addition to forming an image from a sublimable dye layer, a product requiring a letter or a sign is provided with a hot melt ink layer 30. The heat melt ink layer 30 is a coloring material and wax. And a binder resin, and pigments or dyes have been used as colorants as inorganic or organic.

As wax, cannauba wax, paraffin wax, polyethylene wax, etc. may be used, and as binder resin, acrylic resin, polyester resin, epoxy resin, vinyl chloride-vinyl acetate copolymer, polyvinyl butylal resin Has been used.

In the case of products subjected to high thermal or mechanical stress, such as ironing or washing, a protective layer 40 is provided to protect the ink transfer member formed on the receiving paper from such stress.

The protective layer 40 is comprised of the peelable protective layer 42 or the adhesive layer 41 provided on the peelable protective layer 42, The peelable protective layer 42 is a melamine resin, an acrylic resin, a polyester resin. It is made of a resin excellent in transparency, wear resistance and chemical resistance, such as polyurethane resin, the thickness is used in 0.2 to 10㎛.

The peelable protective layer 42 includes silica or alumina in a range that does not impair transparency in order to improve cutting property of separating and transferring the transferred portion from the remaining portion when transferring the hot melt ink layer to the transfer target. The same filler may be added, and a lubricant such as polyethylene wax or silicone oil may be added to improve wear resistance or slip resistance.

The adhesive layer 41 is provided to increase the bonding strength between the hot melt ink layer 30 and the peelable protective layer 42. The adhesive layer 41 is formed of an acrylic resin, a vinyl chloride resin, or a vinyl chloride-vinyl acetate air. It consists of resin which is excellent in the adhesive force by heat like coalescence and polyester, and the thickness of the contact bonding layer 41 is 0.2-4 micrometers normally.

Ultraviolet absorbers or the like were added to the peelable protective layer 42 and the adhesive layer 41 to impart light resistance, that is, light resistance.

The image is formed by the heat head in a state of being opposed to the thermal transfer ribbon, so that a plastic film such as polyester having a water-soluble dye is used as the paper, or a dye such as a plastic film, paper or synthetic paper having no water-soluble dye. In some cases, a water-soluble resin containing a water-soluble resin as a main raw material was used, but the thickness of the water-soluble layer was mainly 5 to 50 μm.

The dye layer 10 of the thermal transfer ribbon is sublimed while varying the amount of dye from the heat head of the printing apparatus to the receiving layer of the receiving paper according to the amount of heat applied to the heat resistant layer 50 from the heat head of the printing apparatus. You will get a burn.

However, in order to obtain an image having excellent image quality, the amount of heat supplied from the heat head must be increased. In this case, the binder of the sublimable dye layer 10 is peeled off from the substrate 60 and adheres to the receiving layer of the paper. Can be reduced.

As the resin used for the anchor layer, both water-soluble or oil-based resins having excellent adhesion such as polyester resins, acrylic resins, polyurethane resins, polyamide resins, and polybutadiene resins can be used. Although applied over (60), the dry coating amount is preferably 0.05 to 1.60 g / m 2.

However, when increasing the concentration of the dye in the dye layer in order to increase the image, the same problem as above occurs because the sufficient adhesion between the dye layer 10 and the anchor layer 70 cannot be imparted.

In order to solve such a problem, the present inventor proposed the installation of an anchor layer containing the same dye as the dye layer between the substrate and the dye layer in Korean Patent Application No. 99-50899.

However, when the dye content contained in the anchor layer is excessively increased, the adhesive strength between the dye layer and the anchor layer remains weak.

An object of the present invention is to provide a method for producing a sublimable thermal transfer ribbon which is excellent in adhesive strength and capable of obtaining a high concentration of a printed image.

The present invention for achieving the above object is provided with an anchor layer 70 between the base material 60 and the dye layer (10, 20), the dye layer consisting of two layers (10, 20) to the anchor layer An ink composition containing 5 to 50% by weight of the total resin weight of the same or the same resin as the resin of the anchor layer 70 is applied to the lower dye layer 20 in contact so that the dry coating amount is 0.05 to 1.50 g / m 2. By installing on the layer 70, the above object can be achieved.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 illustrates a structural diagram of a sublimable thermal transfer ribbon according to the present invention, wherein a heat-resistant layer 50 is provided on one side of a substrate 60 to prevent thermal fusion between the substrate 60 and a heat head. On the other side of the base 60, the anchor layer 70, the lower dye layer 20 and the upper dye layer 10 are sequentially provided.

In addition, a hot melt ink layer 30 is provided according to the product and the application to be applied, and a protective layer 40 composed of an adhesive layer 41 and a peelable protective layer 42 is provided for the protection of a printed image. It may be installed.

In the present invention, the ink composition for the lower dye layer 20 is made by dissolving or dispersing a resin and a sublimable dye in a solvent such as methyl ethyl ketone or toluene, like the ink composition for the upper dye layer 10, and the lower dye layer As the dye used in (20), sublimable dyes of yellow, magenta, and cyan are used according to the upper dye layer 10.

At this time, it is preferable that the lower dye layer 20 contains the same or the same resin as the resin of the anchor layer 70, 5 to 50% by weight of the total resin, when the amount is less than 5% by weight anchor layer When sufficient adhesive strength cannot be obtained, on the contrary, when the content exceeds 50% by weight, a problem arises in that the print density is lowered.

Therefore, the resin constituting the lower dye layer improves the heat resistance of the coating film in the upper dye layer 10, and ethyl cellulose, polyvinyl butyl al, polyvinyl acetal, or polyvinyl chloride in order to easily transfer the dye in the coating film to the water phase. The thermoplastic resin selected from the resin will contain 50 to 95% by weight of the total resin weight, and the polyester resin, acrylic resin, polyurethane resin, polyamide resin or poly used in the anchor layer to give excellent adhesion The adhesive resin selected from the butadiene resins comprises 5 to 50% by weight of the total resin weight.

In addition, it is preferable to apply the dry coating amount of the lower dye layer 20 to 0.05 to 1.50 g / m 2, but when the coating amount is less than 0.05 g / m 2, sufficient adhesive force with the anchor layer cannot be given, and 0.5 g / When it exceeds m2, the problem that print density falls will arise.

Hereinafter, the present invention will be described in more detail with reference to the following examples, but the following examples are merely illustrative of the present invention, and the present invention is not limited to the following examples.

Example 1

Solid content 31% polyester resin ad coat 335A of Morton (Morton) so that a dry coating amount may be 0.4 g / m 2 on the other side of the 5.7 μm polyethylene terephthalate substrate 60 on which the silicone derivative is coated on one side and the heat resistant layer 50 is formed. (Adcote 335A) 38.70% by weight of the composition and methyl ethyl ketone and toluene 30.65% by weight of the composition was applied to form an anchor layer (70), on which cyanide blue Kayaset blue 714 4.0 weight of %, 2.7% by weight of polyvinylbutylal resin S-LEC BX-1 of chemistry, 0.97% by weight of 31% polyester resin Adcote 335A (Morton), and methyl ethyl ketone and toluene An ink composition of 46.17% by weight, respectively, was applied so as to have a dry coating amount of 0.3g / m < 2 > to form a lower dye layer 20, followed by 4.0% by weight of Kayaset Blue 714, a cyan-based dye, and polyhydric poly Vinyl Butyl Al Resin S-LEC A sublimable thermal transfer ribbon was obtained by forming an upper dye layer 10 by applying an ink composition having 3.0 wt% of BX-1 and 46.50 wt% of methyl ethyl ketone and toluene, respectively, to a dry coating amount of 0.7 g / m 2. It is shown in Table 1 by evaluating the fusion or peeling and the print density generated during printing.

Example 2

Using the same method as in Example 1, the amount of polyvinylbutylal resin in the lower dye layer 20, 2.25% by weight, the amount of polyester resin 2.42% by weight and the amount of methyl ethyl ketone and toluene 45.67%, respectively A sublimable thermal transfer ribbon was obtained as a%, and it was shown in Table 1 together with Example 1 by evaluating whether fusion or peeling occurred during printing and the print density.

Example 3

Using the same method as in Example 1, the amount of polyvinylbutylal resin of the lower dye layer 20, 1.80% by weight, the amount of polyester resin 3.87% by weight and the amount of methyl ethyl ketone and toluene 45.17% respectively A sublimable thermal transfer ribbon was obtained as a%, and it was shown in Table 1 together with Example 1 by evaluating whether fusion or peeling occurred during printing and the print density.

Comparative Example 1

Using the same method as in Example 1, without obtaining a lower dye layer, a sublimable thermal transfer ribbon was obtained in which the dry coating amount of the upper layer was 1.0 g / m 2, and the fusion or peeling occurred during printing and the print density were evaluated. It is shown in Table 1 together with Example 1.

Comparative Example 2

Using the same method as in Example 1, the anchor layer 70 is 5% by weight of the oriental spinning polyester resin Vilon 290 (Coronate L), an isocyanate compound of Japan Polyurethane Industry. It is formed by applying a composition comprising 1% by weight and 47% by weight of methyl ethyl ketone and toluene, respectively, the lower dye layer 20 is 8.0% by weight of the cyan dye, polyvinyl butyl al resin denka of the electrochemical industry 10.0% by weight of Denka Butyral 5000A and 47.50% by weight of methyl ethyl ketone and toluene, respectively, the upper dye layer 10 is 20.0% by weight of cyan dye, polyvinyl chloride of electrochemical industry A sublimable thermal transfer ribbon was obtained with 10.0% by weight of Butanal resin Denka Butyral 5000A and 47.50% by weight of methyl ethyl ketone and toluene, respectively. Table 1 with Example 1 Showed wrote.

<Evaluation Method>

-Fusion between dye layer and water phase

A dynamic tester (model name: TH-PMD) was used to evaluate the print pulse period at 4 kHz, the width was 2.6 하며, and the print voltage was 20 V. The paper used was a vinyl chloride card manufactured by Data Business of Korea.

-Peel force

Peel force of the dye layer from the substrate or anchor layer was measured using a peel tester (model name: Heidon-17).

For each of the two samples, each dye layer was applied to a pressure of 5 kgf / cm 2 for 10 seconds to be completely fused, and then cut into a width of 25 mm to measure the T-type peeling force at room temperature. .

-Print density

Using a dynamic tester (model name: TH-PMD), the print pulse period was 4 하고, the width was 2.6 하며, the print voltage was 20 V, and the paper was used in Example 3 using a vinyl chloride card from Data Business of Korea. Relative evaluation was made based on the print density of.

Lower Dye Layer Anchor layer resin content (wt%) relative to the total amount of resin in the lower dye layer Peel force Welding Print density Example 1 U 10 50 or more radish 1.15 Example 2 U 25 50 or more radish 1.08 Example 3 U 40 50 or more radish 1.00 Comparative Example 1 radish 0 17 Occur Not measurable Comparative Example 2 U 0 15 Occur Not measurable

According to the present invention, an ink composition comprising 5 to 50% by weight of the total resin weight of the same or the same resin as the resin of the anchor layer in the lower dye layer composed of two layers of the dye layer in contact with the anchor layer is coated with 0.05 to Installing the lower dye layer to be 1.50 g / ㎡ In the case of Examples 1 to 3, it was evaluated that the adhesion is excellent, even if the comparative example 1 in which the dye layer is installed as a single layer or the dye layer as two layers In Comparative Example 2, in which the same resin as the anchor layer was not used, the adhesive strength was lowered, the fusion occurred, and the print density was also evaluated.

As mentioned above, this invention is the preferable invention which can manufacture the sublimable thermal transfer ribbon which is excellent in adhesive force and can obtain a high density printing image.

Although the present invention has been described with reference to one embodiment illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible.

1 is a structural diagram of a sublimable thermal transfer ribbon according to the present invention

2 is a conceptual diagram of a general sublimation thermal transfer ribbon structure

<Description of the symbols in the drawing>

10,20: sublimable dye layer 11,21: yellow dye layer

12,22: magenta dye layer 13,23: cyan dye layer

30: hot melt ink layer 40: protective layer

41: adhesive layer 42: peelable protective layer

60: base material 50: heat resistant layer

70: anchor layer

Claims (1)

In the method for producing a sublimable thermal transfer ribbon in which a dye layer 10 having a yellow, magenta or cyan dye, an anchor layer 70 containing a binder and a solvent, and a base material 60 are sequentially provided, the dye layer is The ink composition comprising 5 to 50% by weight of the total resin weight of the same or the same resin as the resin of the anchor layer 70 is dried in the lower dye layer 20 which is composed of two layers 10 and 20 and is in contact with the anchor layer. A method of producing a sublimable thermal transfer ribbon, characterized in that the lower dye layer (20) is provided so as to be 0.05 to 1.50 g / m 2 in an application amount.