KR20240088386A - Pre-treatment agent composition for digital textile printing and digital textile printing method using the same - Google Patents

Abstract

The present disclosure is a pretreatment composition for digital printing comprising 10 to 30 parts by weight of an inorganic salt of at least one of calcium chloride and calcium nitrate, and 800 to 2,000 parts by weight of water based on 100 parts by weight of an alkyl phosphate-diallyldimethylammonium chloride copolymer. By providing , digital printing can be performed without restrictions on the type of pigment ink, and the heat and water washing process can be omitted after digital printing, thereby preventing the generation of wastewater.

Description

Pre-treatment agent composition for digital printing and digital printing method using the same {Pre-treatment agent composition for digital textile printing and digital textile printing method using the same}

The present disclosure relates to a pretreatment composition for digital printing and a digital printing method using the same.

In general, printing refers to partially dyeing the fabric, and is a concept that corresponds to dip dyeing, which involves dyeing the entire fabric.

Pretreatment for digital printing is used to ensure that ink does not spread on the fabric and that a clear pattern is formed before printing the fabric with a digital printer. Since these pretreatment agents vary depending on the type of fiber and the ink used, it is necessary to develop pretreatment agents according to various fiber materials.

Traditional printing methods include silk screen printing, roller printing, and transfer printing, but with the recent development of electronic printer technology, digital printing methods that print on fabric or the garment itself as if printing on paper with a digital printer are widely used. do.

When digital printing, methods are being developed to prevent ink from bleeding by pre-treating the fabric to be printed. In other words, before printing textiles with a digital printer, a pretreatment agent is used to ensure that the ink does not spread on the fabric and that a clear pattern is formed. However, since these pretreatment processes have different characteristics depending on the type of fiber and the ink used, pretreatment agents according to various fiber materials are required.

In addition, since printing with ink is usually followed by steaming and washing, a large amount of waste water is generated.

KR 10-2085311 B KR 10-0943093 B

The present disclosure provides a pretreatment composition for digital printing and a digital printing method using the same.

The pretreatment composition for digital printing according to the present disclosure includes 10 to 30 parts by weight of at least one inorganic salt of calcium chloride and calcium nitrate, and 800 to 2,000 parts by weight of water, based on 100 parts by weight of the alkyl phosphate-diallyldimethyl ammonium chloride copolymer. It can be included.

According to one embodiment, the composition may further include 2 to 10 parts by weight of a size agent based on 100 parts by weight of the alkyl phosphate-diallyldimethyl ammonium chloride copolymer.

According to one embodiment, the composition may further include at least one antibacterial agent selected from isopropyl alcohol, isopropyl myristate, and salicylic acid.

According to one embodiment, the composition may further include at least one anti-bleeding agent selected from didecyl ether, tridecyl ether, and tetradecyl ether.

The digital printing method according to the present disclosure includes applying the pretreatment composition for digital printing to the surface of the fabric; Drying the fabric to which the pretreatment composition has been applied; Digitally printing an image with pigment ink on the dried fabric; And it may include drying the fabric on which the image is printed.

According to one embodiment, the step of drying the fabric to which the pretreatment composition is applied may be performed by natural drying.

According to one embodiment, the step of drying the fabric on which the image is printed may be performed by spraying hot air with a temperature ranging from 150°C to 200°C for 200 to 300 seconds.

By pre-treating with the pretreatment composition for digital printing according to the present disclosure, digital printing can be performed without limitation on the type of pigment ink, and the heat and water washing processes can be omitted after digital printing, thereby preventing the generation of wastewater. .

1 is a flowchart of a digital printing method according to one implementation.

The objects, advantages, and features of the present disclosure will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings, but the present disclosure is not necessarily limited thereto. Additionally, in describing the present disclosure, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present disclosure, the detailed description will be omitted.

In assigning reference numerals to components in the drawings, it should be noted that identical components are assigned the same reference numerals as much as possible even if they are shown in different drawings, and similar components are assigned similar reference numerals.

Terms used to describe one implementation of the present disclosure are not intended to limit the disclosure. It should be noted that singular expressions include plural expressions unless the context clearly dictates otherwise.

In this document, expressions such as “have,” “may have,” “includes,” or “may include” refer to the existence of the corresponding feature (e.g., a numerical value, function, operation, or component such as a part). , and does not rule out the existence of additional features.

Terms such as “one”, “other”, “another”, “first”, “second”, etc. refer to the separation of one element from another. They are used for distinction, and the components are not limited by the above terms.

The implementation examples described in this document and the accompanying drawings are not intended to limit the disclosure to specific embodiments. This disclosure should be understood to include various modifications, equivalents, and/or alternatives of the embodiments.

Hereinafter, an implementation example of the present disclosure will be described in detail with reference to the attached drawings.

The present disclosure is a pretreatment composition for digital printing comprising 10 to 30 parts by weight of an inorganic salt of at least one of calcium chloride and calcium nitrate, and 800 to 2,000 parts by weight of water based on 100 parts by weight of an alkyl phosphate-diallyldimethylammonium chloride copolymer. can be provided.

Parts by weight as used in this disclosure means weight ratio. For example, mixing 2 parts by weight of B with 1 part by weight of A means that even if components other than A and B are additionally mixed, the weight ratio of A:B in the mixture is maintained at 1:2.

<Alkyl phosphate-diallyldimethyl ammonium chloride copolymer>

The alkyl phosphate-diallyldimethylammonium chloride copolymer may be a block copolymer containing 10 to 90% by weight of alkyl phosphate and 10 to 90% by weight of diallyldimethylammonium chloride. The weight average molecular weight of the block copolymer may range from 10,000 to 400,000.

<At least one inorganic salt of calcium chloride and calcium nitrate>

In one embodiment, the pretreatment composition for digital printing may include 10 to 30 parts by weight of at least one inorganic salt of calcium chloride and calcium nitrate based on 100 parts by weight of the alkyl phosphate-diallyldimethylammonium chloride copolymer.

If the amount of inorganic salt used is less than 10 parts by weight, color development may be low, and if it exceeds 30 parts by weight, precipitates may occur, resulting in non-uniform concentration distribution of the composition, and may also cause malfunction of pretreatment equipment.

<Water>

In one embodiment, the pretreatment composition for digital printing may include 800 to 2,000 parts by weight of water based on 100 parts by weight of the alkyl phosphate-diallyldimethyl ammonium chloride copolymer. Water is included for uniform mixing and viscosity control of the components of the pretreatment composition for digital printing. When water is included in the above range, the viscosity and miscibility of the composition may be excellent. If water is included in less than 800 parts by weight, the viscosity of the pretreatment composition for digital printing increases excessively, resulting in reduced color development, and if it is included in excess of 2,000 parts by weight, the adhesion and color development of the pigment may be reduced during digital printing.

In one embodiment, the pretreatment composition for digital printing may have a viscosity measured at 20°C of 180 cPs or less. Within the above range, workability, pigment adhesion, and color development may be excellent. For example, the viscosity measured at 20°C may be 70 cPs to 180 cPs, 90 cPs to 160 cPs, or 110 cPs to 130 cPs, and all ranges and subranges in between.

<Hoje>

In one embodiment, the pretreatment composition for digital printing may further include 2 to 10 parts by weight of a size agent based on 100 parts by weight of the alkyl phosphate-diallyldimethylammonium chloride copolymer. In the present disclosure, the size agent serves to settle the pigment on the fiber and may be included to obtain a dye with high color development and sharpness.

In one embodiment, the size includes one or more of carboxymethyl cellulose, carboxymethyl starch, guar gum, and alginate-based compounds.

Carboxymethyl cellulose has excellent hygroscopicity, prevents moisture evaporation from the composition, and can have excellent resistance to decomposition due to microorganisms and chemical factors.

Carboxymethyl starch can be excellent in improving color development and sharpness of printed fabrics and improving tactile feel.

Guar gum can be applied as a size for acidic pigments and can be excellent in improving color development and sharpness of printed fabrics and improving tactile feel.

Alginate-based compounds have excellent hygroscopicity and can have excellent color development and sharpness when digitally printed. In one embodiment, the alginate-based compound may be sodium alginate.

The size may be included in an amount of 2 to 10 parts by weight based on 100 parts by weight of the alkyl phosphate-diallyldimethyl ammonium chloride copolymer. When included in the above range, dyeing material with excellent color development and sharpness can be obtained when digitally printing polyamide-based fabrics or silk fabrics. If the size is included in less than 2 parts by weight, the desired color development and sharpness cannot be obtained, and if it is included in more than 10 parts by weight, the tactile feel of the fabric after digital printing may be damaged.

<Glycol-based compounds>

In one embodiment, the pretreatment composition for digital printing includes 2 to 10 parts by weight of at least one of ethylene glycol, diethylene glycol, triethylene glycol, and tetraethylene glycol based on 100 parts by weight of the alkyl phosphate-diallyldimethylammonium chloride copolymer. It may further include glycol-based compounds.

A glycol-based compound may be included as a fixative for the purpose of improving the fixation and fastness of the pigment during digital printing. If the pretreatment composition for digital printing contains a glycol-based compound in the range of 2 to 10 parts by weight based on 100 parts by weight of the alkyl phosphate-diallyldimethyl ammonium chloride copolymer, the reduction phenomenon of the dye can be prevented, and the pretreatment agent of the present disclosure The composition may have excellent long-term storage.

<Antibacterial agent>

In one embodiment, the pretreatment composition for digital printing further contains 2 to 10 parts by weight of an antibacterial agent selected from the group consisting of isopropyl alcohol, isopropyl myristate, and salicylic acid based on 100 parts by weight of the alkyl phosphate-diallyldimethyl ammonium chloride copolymer. It can be included.

Antibacterial agents may be included for the purpose of antibacterial effect. The antibacterial agent may include one or more of isopropyl alcohol, isopropyl myristate, and salicylic acid. When the antibacterial agent is included in an amount of 2 to 10 parts by weight based on 100 parts by weight of the alkyl phosphate-diallyldimethyl ammonium chloride copolymer, antibacterial properties are excellent and deterioration of color development can be prevented. If the antibacterial agent is included in less than 2 parts by weight, the desired antibacterial property cannot be secured, and if it is included in more than 10 parts by weight, the color development and feel of the fabric after digital printing may be damaged.

<Bleeding prevention agent>

In one embodiment, the pretreatment composition for digital printing includes 2 to 10 parts by weight of at least one anti-bleeding agent among didecyl ether, tridecyl ether, and tetradecyl ether based on 100 parts by weight of the alkyl phosphate-diallyldimethylammonium chloride copolymer. More can be included.

Anti-bleeding agents may be included for the purpose of preventing bleeding and ensuring image sharpness. When the anti-bleeding agent is included in an amount of 2 to 10 parts by weight based on 100 parts by weight of the alkyl phosphate-diallyldimethyl ammonium chloride copolymer, bleeding is prevented during digital printing, and a dyed material with excellent clarity, color development, and sharpness can be obtained. If the anti-bleeding agent is included in less than 2 parts by weight, image clarity deteriorates and it is difficult to prevent bleeding, and if it is included in more than 10 parts by weight, the feel of the fabric after digital printing may be damaged.

<Digital printing method>

1 is a flowchart of a digital printing method according to one implementation. Referring to Figure 1, the digital printing method includes the step of applying the pretreatment composition for digital printing of the present disclosure to the surface of the fabric (S110); Drying the fabric to which the pretreatment composition has been applied (S120); Digitally printing an image with pigment ink on the dried fabric (S130); And it may include drying the fabric on which the image is printed (S140).

Applying the pretreatment composition for digital printing to the surface of the fabric (S110) is a step of applying the pretreatment composition to the surface of the fabric to improve the cohesion of the pigment ink printed in the step described later. According to one embodiment, the fabric may be a polyester-based fabric or a cellulose-based fabric such as cotton (denim), hemp, or rayon.

Here, the pretreatment composition for digital printing improves the color development of the pigment by coagulating the pigment ink applied later, increases the viscosity of the pigment ink, suppresses excessive penetration of the pigment ink into the fabric, and prevents color bleeding. can do.

The pretreatment composition for digital printing is applied to the surface of the fabric in a uniform thickness. Application methods such as dip coating, roller application, spray application, and inkjet application may be used.

When the pretreatment composition for digital printing is applied, the fabric is dried (S120). In one embodiment, the drying step (S120) may be performed by natural drying for about 30 minutes to 3 hours. In an alternative embodiment, heat drying may be performed by spraying hot air in a temperature range of 150°C to 200°C for 200 to 300 seconds.

When the pretreatment composition for digital printing is dried, pigment ink is sprayed to print an image on the fabric (S130).

Pigments may be organic or inorganic pigments. Organic pigments include azo pigments such as azolake pigments, insoluble azo pigments, condensed azo pigments, and chelated azo pigments, phthalocyanine pigments, perylene pigments, perinone pigments, anthraquinone pigments, quinacridone pigments, dioxazine pigments, and thioindigo. Pigments, polycyclic pigments such as isoindolinone pigments, isoindoline pigments, quinophthalone pigments, and diketopyrrolopyrrole pigments, dye lake pigments such as basic dye-type lakes and acidic dye-type lakes, nitro pigments, and nitroso pigments , aniline black, daylight fluorescent pigments, etc. may be used, but are not limited thereto.

Inorganic pigments may include metal oxide pigments such as titanium dioxide, zinc oxide, and chromium oxide, and carbon black, but are not limited thereto.

In one embodiment, the pigment ink can be fed into a digital printing machine and sprayed. A digital printing machine has an inkjet head mounted on a carriage that moves in a predetermined direction, and the inkjet head moves as the carriage moves and sprays pigment ink to print an image. At this time, the pigment ink being sprayed can be ejected without clogging the inkjet head nozzle because the pigment is stably dissolved.

In one embodiment, the step of drying the fabric on which the image is printed (S140) may be performed by spraying hot air at a temperature of 150°C to 200°C on the fabric for 200 to 300 seconds to quickly dry the fabric. This can improve fastness by increasing the fixation speed or fixation rate of the pigment through rapid drying.

In addition, according to the present disclosure, after the step of drying the fabric on which the image is printed (S140), the heat steaming and water washing processes can be omitted, thereby preventing the generation of wastewater.

Example

The present disclosure will be examined in more detail through examples below, but the scope of the present disclosure is not limited to the examples below.

A pretreatment composition for digital printing was prepared using the mixing ratio shown in Table 1 below.

ingredient Alkyl phosphate-diallyldimethylammonium chloride copolymer calcium chloride water Mixing amount
(part by weight) 100 10 890

[Pretreatment performance test]

1) Sunlight fastness

For cotton fabric treated with the pretreatment agent in Table 1 and untreated cotton fabric, light fastness was measured according to KS K ISO 105-B02 after printing using CMYK 4 colors, a pigment ink for digital printing, and the results are shown in Table 2 below. shown in

ink Sunlight fastness of untreated fabrics Sunlight fastness of pretreated fabrics Cyan 3 4-5 Magenta 3 4-5 Yellow 3 4-5 Black 3 4-5

2) Washing fastness

For cotton fabrics treated with the pretreatment agent in Table 1 above and untreated cotton fabrics, washing fastness was measured according to KSK ISO 105-C10(A) after printing using CMYK 4 colors, a pigment ink for digital printing, and the results are as follows. It is shown in Table 3.

ink Washing fastness of untreated fabrics Sunlight fastness of pretreated fabrics Cyan 3 4-5 Magenta 3 4-5 Yellow 3 4-5 Black 3 4-5

3) Friction fastness

For cotton fabrics treated with the pretreatment agent in Table 1 and untreated cotton fabrics, the color fastness to friction was measured according to KSK K ISO 105-X12 after printing using CMYK 4 colors, a pigment ink for digital printing, and the results are shown in Table 4 below. shown in

ink Washing fastness of untreated fabrics Dry rubbing fastness of pretreated fabrics Wet rubbing fastness of pretreated fabrics Cyan 3 4-5 4-5 Magenta 3 4-5 4-5 Yellow 3 4-5 4-5 Black 3 4-5 4-5

The present disclosure has been described in detail above through specific implementation examples. The implementation examples are for specifically explaining the present disclosure, and the present disclosure is not limited thereto. It will be clear that modifications and improvements can be made by those skilled in the art within the technical spirit of the present disclosure.

All simple modifications or changes to the present disclosure fall within the scope of the present disclosure, and the specific scope of protection of the present disclosure will be made clear by the appended claims.

Claims (8)

A pretreatment composition for digital printing comprising 10 to 30 parts by weight of at least one inorganic salt of calcium chloride and calcium nitrate, and 800 to 2,000 parts by weight of water based on 100 parts by weight of alkyl phosphate-diallyldimethyl ammonium chloride copolymer. In claim 1,
The composition is a pretreatment composition for digital printing, further comprising 2 to 10 parts by weight of a grease based on 100 parts by weight of the alkyl phosphate-diallyldimethyl ammonium chloride copolymer. In claim 1,
The composition is a digital printing method further comprising at least one glycol-based compound selected from 2 to 10 parts by weight of ethylene glycol, diethylene glycol, triethylene glycol, and tetraethylene glycol based on 100 parts by weight of the alkyl phosphate-diallyldimethylammonium chloride copolymer. Pretreatment composition for use. In claim 1,
The composition is a pretreatment composition for digital printing, further comprising 2 to 10 parts by weight of at least one antibacterial agent selected from the group consisting of isopropyl alcohol, isopropyl myristate, and salicylic acid, based on 100 parts by weight of the alkyl phosphate-diallyldimethyl ammonium chloride copolymer. In claim 1,
The composition is a pretreatment composition for digital printing further comprising 2 to 10 parts by weight of at least one anti-bleeding agent among didecyl ether, tridecyl ether and tetradecyl ether based on 100 parts by weight of alkyl phosphate-diallyldimethyl ammonium chloride copolymer. . Applying the pretreatment composition for digital printing of claim 1 to the surface of the fabric;
Drying the fabric to which the pretreatment composition has been applied;
Digitally printing an image with pigment ink on the dried fabric; and
A digital printing method comprising drying the fabric on which the image is printed. In claim 6,
A digital printing method in which the step of drying the fabric to which the pretreatment composition is applied is performed by natural drying. In claim 6,
A digital printing method in which the step of drying the fabric on which the image is printed is performed by spraying hot air in a temperature range of 150°C to 200°C for 200 to 300 seconds.