A heat transfer textile coating fluid and method of making same

Abstract

A kind of heat sublimation fabric coating liquid and its preparation method, the raw material of the heat sublimation fabric coating liquid includes: polyacrylamide, water, dispersing agent, crosslinking agent, polyurethane, surfactant, color fixing agent, polylactic acid, sodium 5-sulfonate of isophthalic acid;The present application also includes the preparation method of the heat sublimation fabric coating liquid.The present application has the characteristics of high color saturation and pattern definition, good water washing resistance and tensile performance;It can be compatible with a variety of cloth, so that the fabric except terylene fabric can also be directly heat sublimation operation, expand the scope of application of heat sublimation;Preparation method is simple, easy to produce.

Description

Technical Field

[0001] This invention relates to a fabric coating liquid and its preparation method, specifically to a thermal sublimation fabric coating liquid and its preparation method. Background Technology

[0002] The principle of thermal sublimation is mainly to sublimate pigment molecules from a solid state to a gaseous state by heating them into the medium. Sublimation coating liquid is a commonly used product in the thermal sublimation process. The application method is as follows: after shaking the coating liquid evenly and spraying it onto the fabric, it is dried to form a film. Then, thermal sublimation paper with a printed pattern is placed on the surface, and the pattern is sublimated onto the fabric through high-temperature hot pressing, forming a patterned coating. Compared with traditional customized methods such as lettering film and offset printing, thermal sublimation is simpler and more convenient, requiring no additional machinery or film materials. It only requires printing the pattern onto thermal sublimation paper and then sublimating it onto the fabric at high temperature, without damaging the fabric itself.

[0003] As people pay more attention to fashion, their pursuit of individuality is also increasing, with more people using sublimation to achieve clothing customization. However, existing sublimation fabric coatings for clothing do not produce high color fidelity and have poor water resistance. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a thermal sublimation fabric coating liquid and its preparation method, so that the patterned coating has no obvious shortcomings in terms of color and water resistance.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: a thermal sublimation fabric coating liquid, the raw materials of which include: polyacrylamide, water, dispersant, crosslinking agent, polyurethane, surfactant, color fixing agent, polylactic acid, and sodium isophthalic acid-5-sulfonate.

[0006] This invention features high color saturation and pattern clarity, excellent water resistance and tensile strength.

[0007] Preferably, the polyacrylamide is one or more of betaine-type amphoteric polyacrylamide, starch-grafted polyacrylamide, and nonionic polyacrylamide.

[0008] By adopting the above technical solutions, the product has good performance.

[0009] Preferably, the surfactant is one or a mixture of two of oleic acid diethanolamide, hexadecyltrimethylammonium chloride, and sodium dodecyl diphenyl ether disulfonate.

[0010] By adopting the above technical solutions, the product has good performance.

[0011] Preferably, the crosslinking agent is one or more of polypropylene glycol, N,N-methylenebisacrylamide, polypropylene glycol glycidyl ether, and ethylene glycol dimethacrylate.

[0012] By adopting the above technical solutions, the product has good performance.

[0013] Preferably, the dispersant is one or more of polyoxyethylene alkylamide, sodium polyacrylate, pyridinium salt, polyethylene oxide, and polyvinylpyrrolidone.

[0014] By adopting the above technical solutions, the product has good performance.

[0015] Preferably, the polyurethane is one or more of aromatic isocyanate and aliphatic isocyanate types.

[0016] By adopting the above technical solutions, the product has good performance.

[0017] Preferably, the raw materials, by mass parts, include:

[0018]

[0019] By adopting the above technical solutions, the product has good performance.

[0020] More preferably, the raw materials include, by parts by weight:

[0021]

[0022] By adopting the above technical solutions, the product has good performance.

[0023] The method for preparing the thermal sublimation fabric coating liquid of the present invention involves using raw materials for functional components and raw materials for carrier components. First, the raw materials for functional components and raw materials for carrier components are mixed separately to obtain functional components and carrier components. Then, the functional components and carrier components are mixed to obtain the thermal sublimation fabric coating liquid.

[0024] By adopting the above technical solution, the preparation method is simple and easy to produce.

[0025] Preferably, the raw materials for the functional components include:

[0026]

[0027] Preferably, the raw materials for the carrier component include:

[0028]

[0029] By adopting the above technical solutions, the product has good performance.

[0030] More preferably, the raw materials for the functional components include:

[0031]

[0032] More preferably, the raw materials for the carrier component include:

[0033]

[0034] By adopting the above technical solutions, the product has good performance.

[0035] Preferably, the mixing order of the raw materials for the functional components is as follows: first, mix the polyacrylamide, dispersant and water, then add the crosslinking agent and mix well.

[0036] By adopting the above technical solution, the mixing effect is good.

[0037] Preferably, the mixing order of the raw materials for the carrier component is as follows: first, mix polyurethane, sodium isophthalate-5-sulfonate, polylactic acid and dispersant, then add color-fixing agent and surfactant, and mix well.

[0038] By adopting the above technical solution, the mixing effect is good.

[0039] Preferably, the preparation method of the functional component includes: stirring polyacrylamide, dispersant and water at a rate of 600 r / min to 800 r / min for 30 to 40 min, then adding crosslinking agent and stirring at a rate of 600 r / min to 800 r / min for 10 to 15 min.

[0040] By adopting the above technical solution, the mixing effect is good.

[0041] Preferably, the preparation method of the carrier component includes: stirring polyurethane, sodium isophthalate-5-sulfonate, polylactic acid and dispersant at a rate of 500 r / min to 800 r / min for 20 to 30 min; adding the fixing agent and surfactant, and stirring at a rate of 800 r / min to 1000 r / min for 5 to 10 min.

[0042] By adopting the above technical solution, the mixing effect is good.

[0043] Preferably, the functional component and the carrier component are stirred at a rate of 800 r / min to 1000 r / min for 5 to 10 minutes to obtain the thermal sublimation fabric coating liquid.

[0044] By adopting the above technical solution, the mixing effect is good.

[0045] When polyurethane polymers lose water to form a film, the gaps between polymer emulsion particles begin to narrow, forming capillaries. This capillary action forces the emulsion particles to deform, causing them to move closer together. When adjacent particles are within the contact area, the polymer chain ends link through chemical reactions, ultimately forming a coating through a continuous reaction. This coating possesses a large number of nanoporous structures. The greater the number of micropores per unit area, the more color-developing micropores there are per unit area after the adsorption of sublimation ink particles, thus increasing the density of color-developing micropores per unit area and significantly improving the color reproduction of the coating. This invention can lock in more sublimation ink per unit volume, improving color reproduction and pattern clarity.

[0046] Polyacrylamide contains amide groups in its structural units, which easily form hydrogen bonds, giving polyacrylamide high water absorption properties. During hot pressing and washing, mechanical changes occur due to moisture absorption and dehydration, which drive the movement of specific structures in the coating, giving the coating intelligent opening and closing characteristics—the coating structure opens in a dry environment and closes in a humid environment.

[0047] During hot pressing, the molecular chain segments in the amorphous region of the coating move more rapidly, increasing the porosity and gradually softening into a semi-molten state, forming a liquid layer. Polyacrylamide causes the pores of the coating structure to expand due to dehydration during hot pressing. The disperse dye sublimates into a gaseous state at the hot pressing temperature. The ester groups present in the polyurethane can form hydrogen bonds with the hydroxyl and amino groups on the disperse dye. Due to these interactions, the gaseous disperse dye moves to the vicinity of the liquid layer and then enters the amorphous region through the enlarged pores. According to the principle of "like dissolves like," the disperse dye can be considered to be "dissolved" in the liquid amorphous region. Upon cooling, the polyacrylamide causes the pores of the coating structure to shrink, leaving the disperse dye molecules trapped in the amorphous region, effectively trapping the disperse dye.

[0048] During water washing, the polyacrylamide absorbs moisture, which further reduces the pore size of the coating structure. The physical barrier formed by the closed coating structure effectively locks in the sublimation ink, improving the coating's water resistance.

[0049] Introducing crosslinking agents into the PU network allows the zipper-like slip ring crosslinking agent to combine with the dry PU network containing hydrogen-bonded crystalline domains, resulting in a super-strong and highly stretchable supramolecular network. The key mechanism behind this significant performance improvement is the synergistic effect of the slip ring effect and the hydrogen-bonded crystalline domains within the polymer network. Specifically, the stacked hydrogen bonds are simultaneously disrupted through the sliding motion of the molecular zipper, while the dense distribution of hydrogen bonds further amplifies the effect of the slip ring. This molecular zipper strategy maximizes mechanical strength and stretchability, preserves the fabric's inherent elastic properties, and improves the tensile strength of the sublimated fabric coating.

[0050] The sublimation fabric coating liquid of the present invention has good compatibility with a variety of fabrics on the market, solves the limitation of traditional sublimation fabric coating liquids in terms of applicable fabrics, improves the shortcomings of poor washability and poor color saturation after pattern printing, and brings users a better performance experience.

[0051] Beneficial effects of this invention:

[0052] (1) The present invention has the characteristics of high color saturation and pattern clarity, good water resistance and tensile strength;

[0053] (2) It is compatible with a variety of fabrics, so that fabrics other than polyester fabrics can also be directly subjected to heat sublimation, thus expanding the scope of application of heat sublimation.

[0054] (3) The preparation method is simple and easy to produce. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be described more fully below, and preferred embodiments of the present invention will be provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the disclosure of the present invention will be achieved.

[0056] Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the invention as claimed, but merely to illustrate selected embodiments of the invention.

[0057] The raw materials used in all embodiments and comparative examples were obtained through conventional commercial means.

[0058] Example 1

[0059] The raw material usage in this embodiment is as follows:

[0060] 1) The raw materials for the functional components include:

[0061]

[0062] 2) The raw materials for the carrier components include:

[0063]

[0064] The polyacrylamide is a betaine-type amphoteric polyacrylamide.

[0065] The surfactant is a 1:1 mixture of oleic acid diethanolamide and sodium dodecyl diphenyl ether disulfonate.

[0066] The crosslinking agent is N,N-methylenebisacrylamide.

[0067] The dispersant is a polyoxyethylene alkylamide.

[0068] The polyurethane is an aromatic isocyanate type.

[0069] The method for preparing the sublimation fabric coating liquid in this embodiment involves first mixing the raw materials of the functional component and the raw materials of the carrier component separately to obtain the functional component and the carrier component, and then mixing the functional component and the carrier component to obtain the sublimation fabric coating liquid. Specifically:

[0070] Preparation of functional components: Polyacrylamide and dispersant were added to water and stirred at 600 r / min for 30 min. Then, crosslinking agent was added and stirred at 600 r / min for 10 min.

[0071] Preparation of the carrier component: Sodium isophthalic acid-5-sulfonate, polylactic acid and dispersant are added to polyurethane and stirred at a rate of 500 r / min for 20 min; then the fixing agent and surfactant are added and stirred at a rate of 800 r / min for 5 min.

[0072] Finally, the functional components and the carrier components are mixed and stirred at a rate of 800 r / min for 5 min to obtain the thermal sublimation fabric coating liquid.

[0073] Example 2

[0074] The raw material usage in this embodiment is as follows:

[0075] 1) The raw materials for the functional components include:

[0076]

[0077] 2) The raw materials for the carrier components include:

[0078]

[0079] The polyacrylamide is a nonionic polyacrylamide.

[0080] The surfactant is a 1:1 mixture of oleic acid diethanolamide and sodium dodecyl diphenyl ether disulfonate.

[0081] The crosslinking agent is polypropylene glycol glycidyl ether.

[0082] The dispersant is a 1:1 mixture of polyethylene oxide and polyvinylpyrrolidone.

[0083] The polyurethane is an aliphatic isocyanate type.

[0084] The method for preparing the sublimation fabric coating liquid in this embodiment involves first mixing the raw materials of the functional component and the raw materials of the carrier component separately to obtain the functional component and the carrier component, and then mixing the functional component and the carrier component to obtain the sublimation fabric coating liquid. Specifically:

[0085] Preparation of functional components: Polyacrylamide and dispersant were added to water and stirred at 800 r / min for 40 min. Then, crosslinking agent was added and stirred at 800 r / min for 15 min.

[0086] Preparation of the carrier component: Sodium isophthalic acid-5-sulfonate, polylactic acid and dispersant are added to polyurethane and stirred at a rate of 800 r / min for 30 min; then the fixing agent and surfactant are added and stirred at a rate of 1000 r / min for 10 min.

[0087] Finally, the functional components and the carrier components are mixed and stirred at a rate of 1000 r / min for 10 min to obtain the thermal sublimation fabric coating liquid.

[0088] Example 3

[0089] The raw material usage in this embodiment is as follows:

[0090] 1) The raw materials for the functional components include:

[0091]

[0092] 2) The raw materials for the carrier components include:

[0093]

[0094] The polyacrylamide is a nonionic polyacrylamide.

[0095] The surfactant is a 1:1 mixture of oleic acid diethanolamide and sodium dodecyl diphenyl ether disulfonate.

[0096] The crosslinking agent is ethylene glycol dimethacrylate.

[0097] The dispersant is a polyoxyethylene alkylamide.

[0098] The polyurethane is an aliphatic isocyanate type.

[0099] The method for preparing the sublimation fabric coating liquid in this embodiment involves first mixing the raw materials of the functional component and the raw materials of the carrier component separately to obtain the functional component and the carrier component, and then mixing the functional component and the carrier component to obtain the sublimation fabric coating liquid. Specifically:

[0100] Preparation of functional components: Polyacrylamide and dispersant were added to water and stirred at 700 r / min for 35 min. Then, crosslinking agent was added and stirred at 700 r / min for 12 min.

[0101] Preparation of the carrier component: Sodium isophthalic acid-5-sulfonate, polylactic acid and dispersant are added to polyurethane and stirred at a rate of 650 r / min for 25 min; then the fixing agent and surfactant are added and stirred at a rate of 900 r / min for 7 min.

[0102] Finally, the functional components and the carrier components are mixed and stirred at a rate of 900 r / min for 8 min to obtain the thermal sublimation fabric coating liquid.

[0103] Comparative Example 1

[0104] The raw materials used in this comparative example are as follows:

[0105] 1) The raw materials for the functional components include:

[0106]

[0107] 2) The raw materials for the carrier components include:

[0108]

[0109] The polyacrylamide is a nonionic polyacrylamide.

[0110] The surfactant is a 1:1 mixture of oleic acid diethanolamide and sodium dodecyl diphenyl ether disulfonate.

[0111] The crosslinking agent is polypropylene glycol glycidyl ether.

[0112] The dispersant is a 1:1 mixture of polyethylene oxide and polyvinylpyrrolidone.

[0113] The polyurethane is an aliphatic isocyanate type.

[0114] The preparation method of the sublimation fabric coating liquid in this comparative example involves first mixing the raw materials of the functional component and the raw materials of the carrier component separately to obtain the functional component and the carrier component, and then mixing the functional component and the carrier component to obtain the sublimation fabric coating liquid. Specifically:

[0115] Preparation of functional components: Polyacrylamide and dispersant were added to water and stirred at 800 r / min for 40 min. Then, crosslinking agent was added and stirred at 800 r / min for 15 min.

[0116] Preparation of the carrier component: Sodium isophthalic acid-5-sulfonate, polylactic acid and dispersant are added to polyurethane and stirred at a rate of 800 r / min for 30 min; then the fixing agent and surfactant are added and stirred at a rate of 1000 r / min for 10 min.

[0117] Finally, the functional components and the carrier components are mixed and stirred at a rate of 1000 r / min for 10 min to obtain the thermal sublimation fabric coating liquid.

[0118] Comparative Example 2

[0119] The raw materials used in this comparative example are as follows:

[0120] 1) The raw materials for the functional components include:

[0121]

[0122] 2) The raw materials for the carrier components include:

[0123]

[0124] The polyacrylamide is a nonionic polyacrylamide.

[0125] The surfactant is a 1:1 mixture of oleic acid diethanolamide and sodium dodecyl diphenyl ether disulfonate.

[0126] The dispersant is a 1:1 mixture of polyethylene oxide and polyvinylpyrrolidone.

[0127] The polyurethane is an aliphatic isocyanate type.

[0128] The preparation method of the sublimation fabric coating liquid in this comparative example involves first mixing the raw materials of the functional component and the raw materials of the carrier component separately to obtain the functional component and the carrier component, and then mixing the functional component and the carrier component to obtain the sublimation fabric coating liquid. Specifically:

[0129] Preparation of functional components: Polyacrylamide and dispersant were added to water and stirred at 800 r / min for 40 min, and then stirred at 800 r / min for 15 min.

[0130] Preparation of the carrier component: Sodium isophthalic acid-5-sulfonate, polylactic acid and dispersant are added to polyurethane and stirred at a rate of 800 r / min for 30 min; then the fixing agent and surfactant are added and stirred at a rate of 1000 r / min for 10 min.

[0131] Finally, the functional components and the carrier components are mixed and stirred at a rate of 1000 r / min for 10 min to obtain the thermal sublimation fabric coating liquid.

[0132] Performance testing

[0133] 1) Spray the obtained coating liquid evenly onto various test fabrics. Transfer the pattern on the printed sublimation paper directly onto each test fabric using a hot press. Set the heat transfer temperature to 150-160 degrees Celsius, the time to 20-25 seconds, and the pressure to 25-35 pounds. Observe the clarity and color saturation of the transferred pattern on the fabric.

[0134] 2) Machine washing of the coated fabric obtained in step 1) The machine washing water temperature was controlled at 30℃. The spin speed was controlled at 1000r, and the machine washing time was 52min. The water resistance of the sublimation fabric coating was tested.

[0135] 3) Spray the thermal sublimation fabric coating liquid evenly onto the DuPont Lycra fabric and test the tensile strength of the coating using a tensile tester.

[0136] The test results are shown in Table 1.

[0137] Table 1 Performance test results of each embodiment and comparative example

[0138]

[0139] The coatings formed on various fabrics by the coating liquids of Examples 1-3 all exhibit good performance in all aspects, with no obvious shortcomings. Among them, the sublimation fabric coating prepared in Example 1 has the characteristics of good water resistance and good tensile strength; the color saturation and pattern clarity of Example 3 are high; the sublimation fabric coating prepared in Example 2 has high color saturation and pattern clarity, as well as good water resistance and tensile strength.

[0140] Comparative Example 1 used a relatively small amount of polyacrylamide, resulting in a significant decrease in the product's wash resistance, while other properties remained unchanged. Comparative Example 2 did not use a crosslinking agent and also used a relatively small amount of polyurethane, leading to a significant decrease in color saturation, pattern clarity, and tensile strength, while the wash resistance remained unchanged. The addition of crosslinking agents directly affects the tensile strength of the sublimation fabric coating; the proportion of polyurethane directly affects the coating's color saturation and pattern clarity; the proportion of polyacrylamide directly affects the coating's wash resistance. Furthermore, when the amount of a certain raw material is too low, the performance improvements brought by other raw materials will be difficult to fully realize.

[0141] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A thermal sublimation fabric coating liquid, characterized in that, The raw materials are divided into raw materials for functional components and raw materials for carrier components. The raw materials for the functional components include: 10-20 parts of polyacrylamide; 10-20 parts water; 1-2 parts dispersant; 1-2 parts of crosslinking agent; The raw materials for the carrier component include: 50-70 parts of polyurethane; 1-2 parts dispersant; 1-2 parts surfactant; Fixative 1-2 parts; 10-15 parts of polylactic acid; Sodium isophthalic acid-5-sulfonate, 5-10 parts; The polyacrylamide is one or more of the following: betaine-type amphoteric polyacrylamide, starch-grafted polyacrylamide, and nonionic polyacrylamide. The crosslinking agent is one or more of the following: polypropylene glycol, N,N-methylenebisacrylamide, polypropylene glycol glycidyl ether, and ethylene glycol dimethacrylate.

2. The thermal sublimation fabric coating liquid according to claim 1, characterized in that, The surfactant is one or a mixture of two of the following: oleic acid diethanolamide, hexadecyltrimethylammonium chloride, and sodium dodecyl diphenyl ether disulfonate.

3. The thermal sublimation fabric coating liquid according to claim 1 or 2, characterized in that, The dispersant is one or more of the following: polyoxyethylene alkylamide, sodium polyacrylate, pyridinium salt, polyethylene oxide, and polyvinylpyrrolidone.

4. The thermal sublimation fabric coating liquid according to claim 1 or 2, characterized in that, The polyurethane is one or more of aromatic isocyanate and aliphatic isocyanate types.

5. The method for preparing the thermal sublimation fabric coating liquid according to any one of claims 1 to 4, characterized in that, First, the raw materials of the functional component and the raw materials of the carrier component are mixed separately to obtain the functional component and the carrier component. Then, the functional component and the carrier component are mixed to obtain the thermal sublimation fabric coating liquid.

6. The method for preparing the thermal sublimation fabric coating liquid according to claim 5, characterized in that, The mixing order of the raw materials for the functional components is as follows: first, mix the polyacrylamide, dispersant and water, then add the crosslinking agent and mix well.

7. The method for preparing the thermal sublimation fabric coating liquid according to claim 6, characterized in that, The preparation method of the functional component includes: stirring polyacrylamide, dispersant and water at a rate of 600 r / min to 800 r / min for 30 to 40 min, then adding crosslinking agent and stirring at a rate of 600 r / min to 800 r / min for 10 to 15 min.

8. The method for preparing the thermal sublimation fabric coating liquid according to claim 5, characterized in that, The mixing order of the raw materials for the carrier component is as follows: first, mix polyurethane, sodium isophthalate-5-sulfonate, polylactic acid and dispersant, then add color-fixing agent and surfactant, and mix well.

9. The method for preparing the thermal sublimation fabric coating liquid according to claim 8, characterized in that, The preparation method of the carrier component includes: stirring polyurethane, sodium isophthalate-5-sulfonate, polylactic acid and dispersant at a rate of 500 r / min to 800 r / min for 20 to 30 min; adding the fixing agent and surfactant, and stirring at a rate of 800 r / min to 1000 r / min for 5 to 10 min.

10. The method for preparing the thermal sublimation fabric coating liquid according to claim 5, characterized in that, The preparation method of the functional component includes: stirring polyacrylamide, dispersant and water at a rate of 600 r / min to 800 r / min for 30 to 40 min, then adding crosslinking agent and stirring at a rate of 600 r / min to 800 r / min for 10 to 15 min. The preparation method of the carrier component includes: stirring polyurethane, sodium isophthalate-5-sulfonate, polylactic acid and dispersant at a rate of 500 r / min to 800 r / min for 20 to 30 min; adding the color-fixing agent and surfactant, and stirring at a rate of 800 r / min to 1000 r / min for 5 to 10 min. The functional components and the carrier components are stirred at a rate of 800 r / min to 1000 r / min for 5 to 10 minutes to obtain the thermal sublimation fabric coating liquid.

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