KR101728409B1

KR101728409B1 - Sublimation-type heat transfering ink composition for textile printing

Info

Publication number: KR101728409B1
Application number: KR1020170016253A
Authority: KR
Inventors: 장훈태
Original assignee: (주)케이제이인더스트리
Priority date: 2016-09-08
Filing date: 2017-02-06
Publication date: 2017-04-19

Abstract

The present invention relates to a sublimation type thermal ink composition for fabrics, and more particularly, to a dye sublimation type thermal ink composition for fabrics, which is excellent in adhesion properties of disperse dyes to various fabrics including nylon fibers and the like. And the dyes can not be easily separated from the fabric. Thus, the present invention can provide a sublimation type thermal ink ink composition which is excellent in various fastnesses such as washing, water, sweat, sunlight and friction, .

Description

[0002] Sublimation-type heat transfer ink composition for textile printing [0003]

As a method of printing characters or designs, a design such as a picture, a letter or a graphic is printed on a transfer paper of a kind or a copy material or a special material, and a design printed on a transfer paper is transferred to another object (transfer object) by a physical or chemical method It uses the "transfer method" to transfer. Such a transfer method can be subdivided by the type of transfer object and the method of transfer. For example, there is a method of water separation transfer which is mainly applied to ceramics, glass products or enamel products, heat fusion transfer method or thermal sublimation transfer method which is mainly used for fiber, And a direct transfer method in which the transfer is carried out.

The thermal transfer method such as the thermal fusion transfer method or the thermal sublimation transfer method is mainly used for printing designs of trademarks, figures, characters, characters and marks having various shapes and colors in clothes, fibers, shoes, bags, . The thermal transfer method will be described in detail. A transfer sheet formed by printing a design on a transfer sheet and applying an adhesive layer is disposed so that the adhesive layer is in contact with the surface of the transfer object, and then a high temperature (180 to 250 ° C) . Therefore, in the thermal transfer method, a fabric resistant to high temperature is used as a transfer object. Polyester fibers are mainly used as a fabric material to be applied to the thermal transfer method, and in particular, polyethylene terephthalate (PET) fabrics are in particular used.

On the other hand, nylon fiber has excellent physical properties such as tensile strength, toughness, and friction characteristics, is well-bended, has good skin adhesiveness, and is widely used in stockings, carpets, bags, sportswear and the like. However, since nylon fiber has a low melting temperature of 220 ° C and different dye dyeing methods are used in polyester fabrics, it is difficult to control the color density and clarity and it is difficult to apply the thermal transfer method due to the problem of low fastness. This made it difficult to print various designs on nylon fibers. In addition, a method of performing thermal transfer at a temperature lower than the melting temperature of the nylon fiber has been considered. However, as mentioned above, the problem that the dispersed dye in the chemical structure of the nylon fiber can not be completely attached to the nylon fabric, have. That is, when the thermal transfer ink is used for thermal transfer to nylon fiber, the color and the fastness are lowered, and the quality of the printed product is deteriorated to be used for clothing. In order to improve adhesion and adhesion of dyes during the printing process of nylon fibers, various kinds of binders and methods of increasing the amount of use have been applied. However, the manufacturing process is complicated and the cost is increased, The productability and aesthetics were reduced due to stiffness, and commercialization was often impossible.

Regardless of the material of the fabrics, such as natural, blend, and man-made fibers, there has been a continuous effort to print the desired design clearly and to solve the problem of easily discoloring the color by repeated washing or separating the design itself.

Korean Patent Laid-Open Publication No. 10-2000-0054601 (Patent Document 1) discloses a method in which a liquid in which polyethylene is melted is sprayed on the surface of a fabric to form an adhesive layer, and then the transfer sheet on which the design is formed with an aqueous or oily pigment is closely contacted , A method of performing thermal transfer printing is disclosed. Korean Patent Registration No. 10-0421644 (Patent Document 2) discloses a fabric surface treatment agent comprising ethylene vinyl acetate (EVA) resin, dimethylpolysiloxane, polyurethane emulsion and the like as a surface treatment agent for a fabric to be applied to thermal transfer have. Korean Patent Registration No. 10-0922297 (Patent Document 3) discloses a coating material containing amino-modified silicone, water-dispersed polyurethane, and fluorinated resin as a coating material for heat resistance reinforcement of a nylon fabric which is weak in heat and can not be transferred and printed . Patent Documents 1 to 3 disclose techniques for coating the surface of a fabric before thermal transfer to reinforce the heat resistance of the fabric or to increase the bonding force between the sublimation ink and the fabric upon thermal transfer. However, there is a problem that the number of production steps increases due to the addition of a pretreatment process for coating the surface of the fabric before the thermal transfer.

As another technique, there has been developed an ink composition for reinforcing the adhesion property of a dye to a fabric. For example, in Korean Patent Publication No. 10-1038711 (Patent Document 4), there are disclosed a petroleum resin which helps the printed design penetrate well into a fabric, an ethylene vinyl acetate (EVA) resin as a component for fixing the viscosity of the ink, A phenol resin is added to the ink for sublimation. According to the Patent Document 4, there is a problem that the processing method is complicated or the process is increased and the cost is increased, and there is a problem that the touch of the fabric is lowered. Therefore, the material used as the transfer material is limited There is no other choice.

Korean Patent Publication No. 10-2000-0054601 Korean Patent Publication No. 10-0421644 Korean Patent Publication No. 10-0922297 Korean Patent Publication No. 10-1038711

It is an object of the present invention to solve all the problems as described above, and it is an object of the present invention to provide a dye-sensitized solar cell which has excellent adhesion and adhesion properties to various fabrics, The present invention aims to provide a sublimation transfer ink composition for a fabric which has a novel composition which improves the color fastness due to a small amount of dye release.

In order to solve the above-mentioned problems, the present invention provides a dye-sensitized solar cell comprising 10 to 30% by weight of a disperse dye; 10 to 35% by weight of a lactam-based binder; 1 to 5% by weight of a lactam-based adhesion promoter; 0.1 to 5% by weight of an aliphatic amine-based adhesion enhancer; 1 to 10% by weight of an additive selected from the group consisting of dispersants, thickeners, pH adjusting agents and stabilizers; And 30 to 50% by weight of a solvent.

The ink composition provided by the present invention is excellent in the bonding strength to various fabrics using thermoplastic resins such as polyamide (PA), polyethylene terephthalate (PET) and polycarbonate (PC) as materials.

The fabric thermally transferred by the ink composition provided by the present invention is not only sharp in color but also excellent in fastness so as to maintain grades 4 to 5 in terms of fastness such as washing, water, sweat, sunlight, and friction.

In particular, the ink composition of the present invention produces a nylon warp-knit printing product excellent in color development and fastness, because it has a lower melting temperature than a polyethylene terephthalate (PET) fabric and excellent dyeing power against nylon fabrics having different dyeing mechanisms of dyes It is possible.

The sublimation transfer ink composition for fabric according to the present invention comprises 10 to 30% by weight of a disperse dye; 10 to 35% by weight of a lactam-based binder; 1 to 5% by weight of a lactam-based adhesion promoter; 0.1 to 5% by weight of an aliphatic amine-based adhesion enhancer; 1 to 10% by weight of an additive selected from the group consisting of dispersants, thickeners, pH adjusting agents and stabilizers; And 30 to 50% by weight of a solvent; .

Each component included in the sublimation transfer ink composition for fabric according to the present invention will be described in more detail as follows.

(1) Disperse Dyes

Disperse dyes used in the present invention can give favorable effects on dispersibility and dyeability, and may include at least one selected from the group consisting of disperse dyes having a sublimation property and solvent dyes. The disperse dye may specifically include dyes of azo, anthraquinone, quinophthalone, styryl, diphenylmethanetriphenylmethane, oxazine, triazinaxanthene, methine, azomethine, acridine, . Further, commercially available blue disperse dyes include C.I. Disperse Blue 14, 28, 56, 60, 72, 73, 77, 334, 359, 360, 366 and the like. Disperse Yellow 51, 54, 60, 64, 65, 82, 98, 119, 160 and 211; Disperse Red 4, 22, 55, 59, 60, 146, 152, 191, 302, and the like. C.I. Disperse Orange 25, 60, Red 155, blue 35, 36, 97, 104, and the like.

The ink composition of the present invention may contain the disperse dye in an amount of 10 to 30% by weight, preferably 20 to 30% by weight. If the content of the disperse dye is less than 10% by weight, it may be difficult to form an image of high quality. If the content of the disperse dye is more than 30% by weight, stability of ink important in ink quality may be deteriorated.

(2) a lactam-based binder

The lactam-based binder used in the present invention is in the range of pH 4.5 to 5.5, and is a cationic binder containing a lactam-based compound and a lactam-based polymer. The lactam-based binders help the dye to penetrate well into the fabric and also enhance the adhesion properties of the dye to the fabric and the adhesion properties of the fibers and the dye so that the dye is not easily removed from the fabric after dyeing, It is possible to expect an effect of increasing color fastness.

In the ink composition of the present invention, the lactam-based binder may be contained in an amount of 10 to 35% by weight, preferably 20 to 30% by weight. If the content of the lactam-based binder is less than 10% by weight, the adhesion amount of the dye adhered to the fabric after the thermal transfer becomes insufficient, which may cause the sharpness of the printed matter and the color reproduction to be deteriorated. On the other hand, if the content of the lactam-based binder is more than 30% by weight, the excess amount of the dye transferred to the fabric may cause excessive color development and bleeding of the printed matter, which may cause a decrease in fastness. Therefore, when the lactam-based binder is used in the content range proposed by the present invention, the effect of improving the adhesion between the dye and the fabric is remarkably improved.

The lactam-based binder used in the present invention includes a lactam-based compound, a lactam-based polymer, a crosslinking agent, an emulsion stabilizer, a solvent, and other additives. Specifically, it includes 5 to 30% by weight of a lactam-based compound, 1 to 10% by weight of a lactam-based polymer, 1 to 15% by weight of a crosslinking agent, 5 to 20% by weight of an emulsion stabilizer and 30 to 70% by weight of a solvent.

Since the lactam-based binder contains the lactam-based compound and the lactam-based polymer in a predetermined amount range, the adhesion and adhesion properties to the fabric are remarkably improved as compared with the acrylic binder. As a result, the use of the lactam-based binder enabled the dye to be extended to nylon fabrics.

The lactam-based compound is a cyclic amide compound of tetragonal to octagonal type. The lactam ring of the lactam compound may form a saturated ring which does not contain a double bond or may contain one to three double bonds to form a partially unsaturated ring. The lactam ring of the lactam-based compound may be substituted or unsubstituted by a C ₁ -C ₁₀ alkyl group. The lactam-based compound is specifically a compound selected from the group consisting of azetidin-2-one, pyrrolidin-2-one, piperidin-2-one, azepan- And the lactam compound may be substituted or unsubstituted with a C ₁ -C ₆ alkyl group. The lactam-based compound may be contained in the lactam-based binder in an amount of 5 to 30% by weight. If the content of the lactam-based compound in the lactam-based binder is less than 5% by weight, adhesion and adhesion of the dye to the transfer object may deteriorate at the time of thermal transfer. If the content exceeds 30% by weight, There is a possibility that problems such as spreading or spreading due to overloading may occur.

The lactam-based polymer may be a polymer prepared by using a lactam-based compound and a vinyl-based compound as monomers. The vinyl compound may include vinyl chloride, vinyl acetate, styrene, and the like, and other conventional comonomers used in the production of polymers may be used. The weight average molecular weight of the lactam-based polymer may be approximately 50 to 50,000 g / mol. The lactam-based polymer may be contained in the range of 1 to 10% by weight in the lactam-based binder. If the content of the lactam-based polymer in the lactam-based binder is less than 1% by weight, the adhesive strength of the binder may deteriorate. If the content of the lactam-based polymer exceeds 10% by weight, excess dye may be adhered to the transferred article during thermal transfer, have.

The lactam-based binder may further contain additives such as a crosslinking agent and an emulsion stabilizer.

The crosslinking agent may include amines including triethylamine, triethanolamine, diethylenetriamine, triethylenetetramine, etc., acetic acid, propionic acid, butyric acid, trimethylolbutanoic acid, and the like. The cross-linking agent is contained in the range of 1 to 15% by weight in the lactam-based binder, and more specifically, may be used in a range such that the pH of the lactam-based binder is maintained in the range of 4.5 to 5.5. At this time, if the pH of the lactam-based binder is as low as less than 4.5, the stability of the raw solution of the lactam-based binder deteriorates to cause the layer separation phenomenon, and the viscosity of the lactam-based binder liquid is increased and water is added to lower the viscosity The solid content may be lowered, which may cause deterioration of color and fastness upon printing. On the other hand, when the pH of the lactam-based binder is more than 5.5, there may be a problem similar to the phenomenon when the pH is less than 4.5.

The emulsion stabilizer may be added to prevent the lactam-based binder from being separated or to maintain stability, or to improve the emulsification and dispersibility of various additives. Specifically, as the emulsion stabilizer, polyethylene glycols, polypropylene glycols, and the like can be used. In addition, any emulsion stabilizer that can be included in the binder of the sublimation type thermal ink can be used. The emulsion stabilizer may be contained in the lactam-based binder in an amount of 5 to 20% by weight, specifically 5 to 15% by weight.

The solvent may include at least one selected from the group consisting of purified water, alcohols, and polyhydric alcohols. The solvent is preferably a mixture of purified water, alcohols and polyhydric alcohols. Specifically, the solvent is mixed so that the weight ratio of purified water: alcohols: polyhydric alcohols ranges from 4: 10: 2 to 1: 2: 1. The alcohols may be selected from aliphatic alcohols having 1 to 6 carbon atoms, and specifically may be selected from methanol, ethanol, propanol, isopropanol, butanol, and hexanol. The polyhydric alcohols may be selected from hydroxyl (OH) groups to include at least two, glycerin, ethylene glycol, polyethylene glycol and ethylene glycol mono (C ₁ _~ ₄ alkyl) ether. The solvent may be contained in the range of 30 to 70% by weight in the lactam-based binder. When the content of the solvent contained in the lactam-based binder is less than 30% by weight, the viscosity of the binder may increase sharply or the stability of the raw material solution may deteriorate. When the content of the solvent exceeds 70% by weight, It may be difficult to obtain an addition effect.

The lactam binder having the above composition and composition ratio has a pH ranging from 4 to 5, a specific gravity at 25 ° C of 1.00 to 1.05, a viscosity at 25 ° C of 30 to 40 cps, drying at 105 ° C for 1 hour And the content of the nonvolatile solid content measured after the addition is 5 to 9% by weight.

(3) Lactam-based adhesion enhancer

The ink composition of the present invention contains a lactam-based adhesion enhancer as an adhesion promoter in order to reinforce the adhesion property of the lactam-based binder.

The lactam-based adhesion enhancer may include at least one selected from the group consisting of lactam-based compounds. The lactam-based compound is a cyclic amide compound of tetragonal to octagonal type as described above. The lactam ring of the lactam-based compound may be a saturated ring containing no double bond, or may be a partially unsaturated ring containing 1 to 3 double bonds, and the lactam ring may be a C ₁ to C ₁₀ alkyl group May be substituted or unsubstituted. The lactam-based compound is specifically a compound selected from the group consisting of azetidin-2-one, pyrrolidin-2-one, piperidin-2-one, azepan- And the lactam compound may be substituted or unsubstituted with a C ₁ -C ₆ alkyl group.

The ink composition of the present invention may contain the above-mentioned lactam-based adhesion enhancer in an amount of 1 to 5% by weight, preferably 1 to 3% by weight. When the content of the lactam-based adhesive enhancer is less than 1% by weight, stability of the ink stock solution deteriorates and layer separation may occur. When the content of the lactam based adhesive enhancer exceeds 5% by weight, the viscosity of the stock solution rises, May be generated.

(4) Aliphatic amine-based adhesion promoter

The ink composition of the present invention includes an aliphatic amine-based adhesion enhancer as an adhesion promoter to reinforce the adhesion property of the lactam-based binder. The aliphatic amine-based adhesion enhancer may include at least one selected from the group consisting of aliphatic amine compounds represented by the following formula (1).

[Chemical Formula 1]

(Wherein R is H or NH ₂ and n is an integer of 1 to 10)

The aliphatic amine-based adhesion enhancer may specifically include ethylenediamine, diethylenetriamine, triethylenetetraamine, tetraethylenepentamine, and the like.

The ink composition of the present invention may contain the aliphatic amine-based adhesion promoter in an amount of 5 wt% or less, preferably 0.1 to 5 wt%. If the amount of the aliphatic amine-based adhesion enhancer is less than 0.1% by weight, the stability of the ink stock solution may deteriorate and layer separation may occur. On the other hand, if the content of the aliphatic amine-based adhesion enhancer exceeds 5% by weight, the pH of the ink stock solution may increase and the viscosity of the stock solution may increase, or the stability of the stock solution may deteriorate, and the quality of the product to be transferred and printed with the ink stock solution may be affected.

(5) Additives

The ink composition of the present invention may contain at least one additive selected from the group consisting of a dispersant, a thickener, a pH adjuster, and the like. The additive is usually used for producing a thermal transfer ink, and the present invention does not particularly limit the selection or use amount of the additive. In the ink composition of the present invention, the additive may suitably be contained in the range of 1 to 15% by weight.

The dispersant is used to improve the stability of the disperse dye, and serves to atomize the disperse dye and stably disperse the disperse dye in an aqueous medium. The dispersant may include at least one selected from the group consisting of an anionic surfactant, a nonionic surfactant, a polymer surfactant, a fluororesin, and an acrylic polymer. More preferably, it may be selected from a polymer surfactant, a fluororesin, and an acrylic polymer. The polymeric surfactant may include polyalkyl acrylate, polyalkylene polyamine, and the like. The fluororesin may include polytetrafluoroethylene (PTFE), and the acrylic polymer may include polyacrylate, styrene-acrylic acid copolymer , Styrene-maleic acid copolymer, vinyl naphthalene-maleic acid copolymer, and the like. The dispersant may be contained in the ink composition of the present invention in the range of 0.1 to 10% by weight, specifically 0.3 to 5% by weight.

The thickener is added to maintain the viscosity of the ink composition above a certain viscosity and to improve the spreadability and minimization of the ink and the processability. Specifically, the thickening agent may be polyvinyl alcohol (PVA), carboxymethyl cellulose (CMC), or the like. In addition, any conventional thickener that can be included in the sublimation type thermal ink can be used. The thickener may be contained in the ink composition of the present invention in the range of 0.1 to 10% by weight, specifically 0.3 to 5% by weight.

The pH adjusting agent is added in order to enhance the stability of the raw solution of the ink and to partially exhibit the crosslinking effect, thereby improving the dye adhesion of the fibers. Specifically, the pH adjuster may include amines including triethylamine, triethanolamine, diethylenetriamine, triethylenetetraamine, etc., and acids selected from acetic acid, propionic acid, butyric acid, trimethylolbutanoic acid and the like. In addition, any conventional pH adjusting agent that can be included in the sublimation type thermal ink can be applied. The content of the pH adjusting agent may be adjusted within a range in which the pH of the ultimately prepared ink composition is adjusted to be in the range of 4.5 to 5.5. In general, the content of the pH adjusting agent may be in the range of 0.1 to 10% by weight, specifically 0.3 to 5% by weight in the ink composition of the present invention.

In addition, the ink composition of the present invention may further contain a fastness enhancer, a surface modifier, a defoaming agent, an antiseptic agent, an emulsion stabilizer, and the like within the range not hindering the object of the present invention.

(6) Solvent

The ink composition of the present invention includes a solvent. The solvent may include at least one selected from the group consisting of purified water, alcohols, and polyhydric alcohols. The alcohols may be selected from aliphatic alcohols having 1 to 6 carbon atoms, and specifically may be selected from methanol, ethanol, propanol, isopropanol, butanol, and hexanol. The polyhydric alcohols may be selected from hydroxyl (OH) groups to include at least two, glycerin, ethylene glycol, polyethylene glycol and ethylene glycol mono (C ₁ _~ ₄ alkyl) ether.

The ink composition of the present invention may contain the solvent in an amount of 30 to 50% by weight, preferably 35 to 55% by weight. If the content of the solvent is less than 30% by weight, the ink composition may be excessively high in viscosity, resulting in poor processability and poor quality. If the content of the solvent exceeds 50% by weight, the solid content of the ink may fall, There may be a problem that the fairness is low even if it is too low.

The present invention will now be described in more detail with reference to the following examples, but the present invention is not limited thereto.

[Example]

Production Examples 1 to 2 and Comparative Production Examples 1 to 3. Preparation of a lactam-based binder

Each component was mixed and stirred at the composition ratios shown in Table 1 below to prepare a lactam-based binder. Specifically, a solvent composed of purified water (pH 6.5 to 7.5), ethanol and ethylene glycol monobutyl ether (EGBE) is mixed with N-methyl-2-pyrrolidone (NMP) as a lactam compound and polyvinylpyrrolidone (PVP) was added and stirred at a speed of 1500 rpm to prepare a clear liquid solution. In this case, a clear liquid solution refers to a solution in which the components constituting the raw liquid are uniformly mixed and the raw liquid is stable. After the mixing, it is confirmed that the solution is coated on a clean glass plate to check whether particles or lumps are formed Respectively. Then, dimethylolbutanoic acid (DMBA) and triethanolamine were added as crosslinking agents, and polyethylene glycol as an emulsifying stabilizer and urea as an additive were added to prepare a lactam-based binder having a pH of 4.5 to 5.5.

division Manufacturing example Comparative Manufacturing Example One 2 One 2 3

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castle The lactam-based compound (NMP) 8 13 15 5 0 The lactam-based polymer (PVP) 5 8 3 0 0 Acrylic compound 0 0 0 12 15 Cross-linking agent Dimethylolbutanoic acid 7 7 7 7 7 Triethanolamine 0.5 0.5 0.5 0.5 0.5 Emulsion stabilizer (polyethylene glycol) 17.5 17.5 17.5 17.5 17.5 Other additives (urea) 8 8 8 8 8 solvent Purified water 43 35 38 39 41 ethanol 5 5 5 5 5 EGBE 6 6 6 6 6 Total content (% by weight) 100 100 100 100 100

Examples 1 to 2 and Comparative Examples 1 to 6. Preparation of Ink Composition

The components were mixed and stirred under the composition ratios shown in Table 2 or Table 3 to prepare an ink composition.

Specifically, four color disperse dyes (C, M, Y, K) were added to purified water and stirred at a speed of 1500 rpm for 15 minutes, and then the lactam binder prepared above was added. Polyacrylate dispersant (manufactured by efka, Germany) was charged and stirred at a stirring speed of 1500 rpm for 10 minutes. To adjust the viscosity, 10% polyvinyl acetate (PVA) aqueous solution and 2% carboxymethyl cellulose (CMC) aqueous solution were added as thickening agents, respectively, and the mixture was elevated at 3500 rpm and milled for 1 hour. During the milling, the flow of the cooling water was checked so that the temperature in the vessel did not exceed 30 ° C and the viscosity became 50 to 100 cps. The stirring speed was lowered to 1000 rpm, and triethylenetetramine (TETA) was added as an adhesion promoter for the lactam system and pyrrolidin-2-one as an aliphatic amine-based adhesion promoter. Then, the ink composition was prepared by adding polyoxypropylene glycol as a stabilizer for maintaining the storage stability of the fluororesin dispersion (US DuPont, PTFE Dispersion) and the ink in order and stirring for 30 minutes and stabilizing for 24 hours.

division Example Comparative Example One 2 One 2 3

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castle Disperse dye 25 25 25 25 25 A lactam-based or acrylic binder 25
(Production Example 1) 25
(Production Example 2) 25
(Comparative Production Example 1) 25
(Comparative Production Example 2) 25
(Comparative Production Example 3) adhesion
Reinforcing agent Lactam system 2 2 2 2 2 Aliphatic
Amine system 0.5 0.5 0.5 0.5 0.5 Dispersant Polyacrylate 0.7 0.7 0.7 0.7 0.7 Fluorine resin 0.8 0.8 0.8 0.8 0.8 Thickener PVA aqueous solution 4.0 4.0 4.0 4.0 4.0 CMC aqueous solution 1.0 1.0 1.0 1.0 1.0 stabilizator 1.0 1.0 1.0 1.0 1.0 Purified water 40 40 40 40 40 Total content (% by weight) 100 100 100 100 100

division Comparative Example 4 5 6

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castle Disperse dye 25 25 25 Lactam-based binder 25
(Production Example 1) 25
(Production Example 1) 25
(Production Example 1) adhesion
Reinforcing agent Lactam system 0 2.5 0 Aliphatic amine system 2.5 0 0 Dispersant Polyacrylate 0.7 0.7 0.7 Fluorine resin 0.8 0.8 0.8 Thickener PVA aqueous solution 4.0 4.0 4.0 CMC aqueous solution 1.0 1.0 1.0 stabilizator 1.0 1.0 1.0 Purified water 40 40 42.5 Total content (% by weight) 100 100 100

Experimental Example 1. Measurement of Physical Properties of Ink Composition

The physical properties of the ink compositions prepared in Examples 1 and 2 were measured and the results are shown in Table 4 below.

division Specific Gravity (25 ℃) Viscosity (25 ℃) pH Non-volatile content
(% By weight) ^* Example 1 1.08 1080 5.8 5.2 Example 2 1.10 1200 5.9 5.6 * Non-volatile content: Measured after 1 hour drying at 105 ℃

Experimental Example 2. Measurement of color development degree, fastness, touch feeling of ink composition

After the ink compositions prepared in Examples 1 to 2 and Comparative Examples 1 to 6 were thermally printed on a nylon fabric, the color development, fastness and touch of the nylon fabric were confirmed.

Specifically, a thermal transfer paper having a basis weight of 40 g and a water absorption rate of 95% was used, and each ink composition was thermally printed on a nylon fabric using a six-color gravure printing machine with a depth of corroded portion of the concavo-convex portion of the copper plate of 35 mu. At this time, the temperature around the printing press was maintained at 70 to 75 ° C, and the temperature of the heat roller was maintained at 210 to 215 ° C.

The results of confirming the color development, fastness, and touch of the nylon fabric in which each ink composition is thermally printed are shown in Tables 5 and 6 below.

On the other hand, there is no commercially available product as a sublimation ink for nylon fabric. In this experimental example, the nylon fabric after thermal transfer printing on the nylon fabric by the same method as above using the sublimation ink dye (Disperser Dyestuff Black, IndiCam) mainly used in the polyester fabric, Fastness and touch were confirmed, and the results are shown in Table 6 as a control example.

[Method for Measuring the Properties of Thermal Printed Nylon Fabrics]

(1) Color development degree

(1) Stability of the ink stock solution: It was confirmed whether or not the layer separation of the ink stock solution occurred after leaving for 3 days.

(Evaluation)?: Excellent,?: Normal, X: Bad

② Color and quality during transcription: The color contrast and color density of the original design and the degree of spread of the pattern boundary were measured.

(Evaluation)?: Excellent,?: Normal, X: Bad

(2) Fastness

Judgment of fastness was judged from 1st to 5th grade.

① Color fastness to washing

During dyeing, the degree of discoloration of the dye with different fibers was assessed by the degree of color change when the dye was washed with incomplete dyeing.

② Color fastness to water

The resistance of the dyed products to water was measured, and the degree of discoloration and the degree of contamination which occurred when the product was immersed in water for a long period of time during rain or during washing was evaluated.

③ Color fastness to light

The degree of discoloration of the dye was evaluated by destroying the pigment due to the ultraviolet rays of sunlight.

④ Color fastness to rubbing

Tests were conducted under dry and wet conditions to determine the degree of dye transfer when rubbing the dye, and the degree of dyeing was evaluated by comparing with the standard gray color chart .

⑤ Color fastness to dry cleaning

To evaluate the durability of dyed products for dry cleaning, samples were stuck to contaminated cloth, and perchlorethylene was added. After stirring under a constant condition, the discoloration and contamination degree of the samples were evaluated by comparing with the standard gray color charts.

⑥ Color fastness to perspiration

The extent of dyeing or discoloration of the dyed material by sweat of the human body was evaluated.

(3) Touch feeling

In order to investigate the aesthetic effect of the sublimated transfer fabric, the degree of touch and drape was evaluated by touching with hand.

(Evaluation)?: Excellent (Softness),?: Normal, X: Bad (Stiffness)

division Example Comparative Example One 2 One 2 3 foot
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Degree Ink stock solution stability ○ ○ △ ○ ○ Color and elegance at warrior ○ △ - ○ △ - × △ △

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Degree Laundry
Fastness Machine washing 3 to 4 Level 3 or higher 2nd grade 2nd grade 2nd grade Hand Wash 3 to 4 Level 3 or higher 2nd grade 2nd grade 2nd grade Water fastness 3 to 4 Class 3 1st grade Class 3 2nd grade Light fastness Level 4 or higher Level 4 or higher 2nd grade Class 3 1 to 2 friction
Fastness Wet 3 to 4 3 to 4 2nd grade 2nd grade 2nd grade deflation 4 to 5 4 to 5 2nd grade Class 3 2 to 3 Dry Cleaning Fastness 4 to 5 4th grade 2nd grade Class 3 2nd grade Sweat fastness 4 to 5 4th grade 2nd grade Class 3 1st grade Touch ○ ○ ○ △ △ - ×

division Comparative Example Control Example 4 5 6 foot
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Degree Ink stock solution stability △ ○ △ ○ Color and elegance at warrior ○ ~ △ ○ ○ ×

Dog
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Degree Laundry
Fastness Machine washing Level 2 or higher Class 3 2nd grade 1 to 2 Hand Wash 2nd grade Class 3 2nd grade 1 to 2 Water fastness Class 3 2nd grade 2nd grade 1 to 2 Light fastness 2 to 3 Class 3 1 to 2 2nd grade friction
Fastness Wet 2 to 3 Class 3 2nd grade 1 to 2 deflation 3 to 4 3 to 4 Class 3 2nd grade Dry Cleaning Fastness Class 3 Class 3 2nd grade 1st grade Sweat fastness 2nd grade Class 3 2nd grade 2nd grade Touch ○ ○ ○ △ - ×

According to the measurement results of the physical properties shown in Tables 5 and 6, the ink compositions of Examples 1 and 2 proposed by the present invention were excellent in stability of the raw material solution and excellent in color and quality of sublimation type thermal transfer in nylon fabric. In addition, the nylon fabrics in which the ink composition is sublimed and thermally transferred have obtained excellent results so as to maintain grades 3 to 5 in various fastness tests.

On the contrary, Comparative Example 1 was an ink composition containing a lactam-based binder prepared by excluding the lactam polymer. The stability of the ink stock solution was poor, and the sublimation type thermal transfer color and quality were also poor in the nylon fabric. In addition, the nylon fabrics in which the ink composition was sublimed and thermally transferred had poor overall results in various fastness tests, and showed a significant decrease in light fastness and water fastness in particular.

Comparative Examples 2 and 3 are ink compositions containing a binder. As a result of thermal transfer on a nylon fabric, the results of the various fastness tests were not satisfactory, and the light fastness and water fastness were significantly lowered. It can be confirmed that the touch is severely deteriorated.

Comparative Examples 4 to 6 are ink compositions prepared by using the lactam-based binder prepared in Production Example 1, and by varying the composition of the adhesion enhancer contained as an ink composition component. The ink compositions of Comparative Examples 4 to 6 were found to have relatively good stability in the raw solution, but it was confirmed that the various fastnesses were remarkably lowered compared with the ink compositions of Examples 1 and 2.

The control samples were sublimation ink dyes which were commonly used, and in comparison with the ink compositions of Examples 1 and 2, the nylon fabrics had significantly lower sublimation type thermal transfer hue and durability, and the sublimation type thermally transferred nylon fabrics And it tends to be remarkably lowered in various fastness tests, and it can be confirmed that the touch is significantly lowered.

INDUSTRIAL APPLICABILITY As described above, the ink composition proposed in the present invention is useful for dyeing a thermoplastic resin material, and in particular, it is used as a sublimation type thermosetting ink for nylon fabrics, and exhibits excellent color fastness and fastness.

Claims

10 to 30% by weight of a disperse dye;
10 to 35% by weight of a lactam-based binder;
1 to 5% by weight of a lactam-based adhesion promoter;
0.1 to 5% by weight of an aliphatic amine-based adhesion enhancer;
1 to 15% by weight of at least one additive selected from the group consisting of a dispersant, a thickener and a pH adjuster; And
30 to 50% by weight of a solvent;
Wherein the thermal transfer ink composition is a sublimation type thermal transfer ink composition.

The method according to claim 1,
The lactam-based binder includes 5 to 30% by weight of a lactam-based compound, 1 to 10% by weight of a lactam-based polymer, 1 to 15% by weight of a crosslinking agent, 5 to 20% by weight of an emulsion stabilizer, and 30 to 70% A sublimation type thermal transfer ink composition for fabric.

The method according to claim 1,
Wherein the lactam-based binder is a cationic binder having a pH in the range of 4.5 to 5.5.

The method according to claim 1,
The lactam-based binder has a specific gravity of 1.00 to 1.05 at 25 占 폚, a viscosity at 25 占 폚 of 30 to 40 cps, a content of non-volatile solid content measured after drying at 105 占 폚 for 1 hour is 5 to 9% Wherein the thermosensitive ink composition is a thermosensitive ink composition.

3. The method of claim 2,
Wherein the lactam-based polymer is prepared by polymerizing a lactam-based compound and a vinyl-based compound.

The method according to claim 1,
Wherein the lactam-based adhesion enhancer is at least one selected from the group consisting of lactam-based compounds.

The method according to claim 1,
Wherein the aliphatic amine-based adhesion enhancer is at least one selected from the group consisting of aliphatic amine compounds represented by the following formula (1).
[Chemical Formula 1]

(Wherein R is H or NH ₂ and n is an integer of 1 to 10)

The method according to claim 2, 5 or 6,
The lactam compound is a quadrangular to octagonal cyclic amide compound, and the lactam ring of the lactam compound may form a saturated ring containing no double bond, or may contain one to three double bonds to form a partially unsaturated And the lactam ring of the lactam compound may be substituted or unsubstituted with a C ₁ -C ₁₀ alkyl group.

9. The method of claim 8,
The lactam-based compound is at least one selected from the group consisting of azetidin-2-one, pyrrolidin-2-one, piperidin-2-one, azepan- , And the lactam compound is a sublimation type thermal transfer ink composition for fabric, wherein the C ₁ -C ₆ alkyl group is substituted or unsubstituted.

The method according to claim 1,
Wherein the fabric is a thermoplastic resin.

The method according to claim 1,
Wherein the fabric is selected from the group consisting of polyamide (PA), polyethylene terephthalate (PET), and polycarbonate (PC).

The method according to claim 1,
Wherein the fabric is a nylon fiber.