Formula and preparation process of special ink for white ink pyrography

Abstract

The invention relates to the technical field of white ink pyrography production, in particular to a formula and a preparation process of special ink for white ink pyrography. The high-altitude light-transmitting projectable ceiling soft film is prepared from the following raw materials in parts by weight: 100 to 120 parts of polyvinyl chloride, 3 to 6 parts of a calcium-zinc stabilizer, 3 to 5 parts of calcium stearate, 2 to 4 parts of 2-hydroxy-4-methoxybenzophenone, 4 to 7 parts of compound nano powder, 6 to 10 parts of hollow glass beads, 25 to 45 parts of dioctyl phthalate, 2 to 3 parts of ammonium polyphosphate, 3 to 5 parts of a high-efficiency flame retardant and 2 to 5 parts of an antioxidant, according to the high-efficiency flame retardant prepared by the preparation method disclosed by the invention, the flame retardant property of the high-efficiency flame retardant is further ensured under the synergistic effect of the spherical zirconium carbide, the magnesium hydroxide film layer and the guanidine sulfamate; the prepared high-altitude light-transmitting projectable ceiling soft film not only has better mechanical property, but also has excellent flame retardant property, and the quality of the high-altitude light-transmitting projectable ceiling soft film is effectively ensured.

Description

Technical Field

[0001] The invention relates to the technical field of white ink heat transfer production, in particular to a special ink formula and preparation process for white ink heat transfer. Background Art

[0002] Heat transfer ink is a specialty ink used in digital heat transfer printing. The printing process involves first printing the printed pattern onto a transfer film using heat transfer ink. The printed pattern on the transfer film is then transferred to the substrate fabric using a heat transfer process. The resulting printed pattern exhibits excellent resistance to heat, washing, friction, and sunlight.

[0003] White ink for heat transfer faces many challenges during storage, transportation, and use. If the ink is left standing for a long time, its viscosity and fluidity will decrease. During the inkjet printing process, the ink needs to maintain good fluidity and stability in the nozzle to ensure accurate and smooth ejection. If the ink is not stable, it is easy to cause nozzle clogging, which not only increases maintenance costs but also reduces production efficiency.

[0004] Based on this, the present invention provides a special ink formula and preparation process for white ink heat transfer to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a special ink formula and preparation process for white ink heat transfer. The prepared special ink for white ink heat transfer not only has good mechanical properties, but also has excellent antibacterial properties, effectively ensuring its quality.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The first aspect of the present invention provides a special ink formula for white ink heat transfer, which is composed of the following raw materials in parts by weight: 20 to 30 parts of base material, 25 to 30 parts of water-based resin, 3 to 5 parts of polyvinyl pyrrolidone, 5 to 8 parts of functional additives, 1 to 3 parts of surfactant and 50 to 100 parts of water.

[0008] The present invention is further configured as follows: the preparation process of the base material is as follows:

[0009] Titanium dioxide is placed in deionized water at a dosage ratio of 0.02 to 0.12 g / mL and ultrasonically treated for 20 to 30 minutes, sodium hexametaphosphate (0.5 to 1.5% by weight of the titanium dioxide) is added thereto, and the mixture is treated at 300 to 400 r / min for 30 to 40 minutes, and then a first composite solution (0.25 to 0.5% by weight of the titanium dioxide) is added dropwise thereto, and then a sodium hydroxide solution (8 to 10% by mass) is added thereto, and the pH is adjusted to 8 to 9. The mixture is heat-treated at 40 to 50° C. for 100 to 120 minutes, filtered, washed with deionized water for 2 to 4 times, and dried at 60 to 80° C. for 10 to 14 hours to obtain a first material;

[0010] Polyethylene glycol PEG-400 is placed in ethanol at a mass ratio of 0.05 to 0.15:1, and treated at 120 to 220 r / min for 10 to 20 minutes. Then, 100 to 110% of the mass of the first material is added thereto, and the mixture is treated at 50 to 60° C. and 200 to 300 r / min for 120 to 150 minutes, and then dried at 40 to 50° C. to constant weight to obtain a second material;

[0011] The second material is placed in deionized water at a dosage ratio of 0.02 to 0.08 g / mL and ultrasonically treated for 20 to 30 minutes, 0.5 to 1.5% of the mass of the second material is added thereto, and the mixture is treated at 300 to 400 r / min for 30 to 40 minutes, 0.25 to 0.5% of the mass of the second material is added thereto by a second composite solution, and then a sodium hydroxide solution with a mass fraction of 8 to 10% is added thereto, and the pH is adjusted to 8 to 9. The mixture is heat-treated at 40 to 50° C. for 100 to 120 minutes, filtered, washed with deionized water for 2 to 4 times, and dried at 60 to 80° C. for 10 to 14 hours to obtain a base material.

[0012] The present invention is further configured as follows: the first composite solution is prepared by composite zirconium nitrate pentahydrate and water in a dosage ratio of 0.05 to 0.1 g / mL.

[0013] The present invention is further configured as follows: the second compound solution is compounded by mixing cerium nitrate hexahydrate and water in a dosage ratio of 0.02 to 0.08 g / mL.

[0014] The present invention is further configured as follows: the water-based resin is formed by mixing water-based polyurethane resin and water-based acrylic resin in a mass ratio of 1.2 to 1.8:1.

[0015] The present invention is further configured as follows: the preparation process of the functional additive is as follows:

[0016] Titanium dioxide is placed in deionized water at a dosage ratio of 0.02 to 0.12 g / mL and ultrasonically treated for 20 to 30 minutes. Polyvinyl pyrrolidone (0.5 to 1% by weight of the titanium dioxide) is added thereto, and the mixture is treated at 400 to 500 r / min for 20 to 30 minutes. Then, butyl titanate (70 to 80% by weight of the titanium dioxide) is added thereto, and stirring is continued for 60 to 90 minutes to obtain a first preformulation.

[0017] Add tin tetrachloride to the mixed solution at a mass ratio of 0.15 to 0.25:1, stir at 100 to 120 rpm for 5 to 10 minutes, adjust the pH to 8 to 9 with aqueous ammonia, and continue stirring for 40 to 50 minutes to obtain a second preformulation;

[0018] The second preformulation is placed in the first preformulation at a mass ratio of 1:3-5, stirred at 200-240 r / min for 120-150 minutes, placed at room temperature for 12-14 hours, then placed in a drying oven, dried at 80-100° C. for 10-12 hours, ground into powder, placed in a muffle furnace, and calcined at 400-600° C. for 120-150 minutes to obtain a functional additive.

[0019] The present invention is further configured as follows: the mixed solution is formed by mixing ethanol and water in a volume ratio of 1 to 2:1.

[0020] The present invention is further configured such that: the surfactant is selected from any one of ethoxylated acetylenic diol and propoxylated acetylenic diol.

[0021] The second aspect of the present invention further provides a process for preparing the above-mentioned white ink heat transfer ink, comprising the following steps:

[0022] Accurately weigh the base material, water-based resin, polyvinyl pyrrolidone, functional additives, surfactant and water and set aside;

[0023] The base material, water-based resin, polyvinyl pyrrolidone, functional additives, surfactant and water are placed in a mixing device and mixed;

[0024] After the mixing is completed, the materials are discharged and then go through the inspection, measurement and packaging processes in sequence to finally obtain the finished product of white ink heat transfer ink.

[0025] The present invention is further configured as follows: the mixing speed is 150-200 r / min, and the mixing time is 20-40 min.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention uses a base material, water-based resin, polyvinyl pyrrolidone, functional additives, surfactants, and water as raw materials. The base material, water-based resin, polyvinyl pyrrolidone, functional additives, surfactants, and water are mixed in a mixing device. After mixing, the materials are discharged and then subjected to inspection, metering, and packaging steps to produce a finished white ink heat transfer ink. The white ink heat transfer ink prepared by the present invention not only has good mechanical properties but also excellent antibacterial properties, effectively ensuring its quality. The white ink heat transfer ink formula and preparation process provided by the present invention have a broader market prospect and are more suitable for promotion. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] Example 1

[0030] This embodiment provides a special ink formula for white ink heat transfer, which is composed of the following raw materials in parts by weight: 20 parts of base material, 25 parts of water-based resin, 3 parts of polyvinyl pyrrolidone, 5 parts of functional additives, 1 part of surfactant and 50 parts of water.

[0031] The preparation process of the base material is as follows:

[0032] Titanium dioxide was placed in deionized water at a dosage ratio of 0.02 g / mL and ultrasonically treated for 20 minutes. Sodium hexametaphosphate (0.5% by weight of the titanium dioxide) was added thereto, and the mixture was treated at 300 r / min for 30 minutes. A first composite solution (0.25% by weight of the titanium dioxide) was then added dropwise thereto. An 8% by weight sodium hydroxide solution was then added, and the pH was adjusted to 8. The mixture was heat-treated at 40° C. for 100 minutes. After suction filtration, the mixture was washed twice with deionized water and dried at 60° C. for 10 hours to obtain a first material.

[0033] Polyethylene glycol PEG-400 is placed in ethanol at a mass ratio of 0.05:1, and treated at 120 r / min for 10 minutes. Then, 100% of the first material by mass is added thereto, and the mixture is treated at 50° C. and 200 r / min for 120 minutes, and then dried at 40° C. to constant weight to obtain a second material;

[0034] The second material was placed in deionized water at a dosage ratio of 0.02 g / mL and ultrasonically treated for 20 minutes. Sodium hexametaphosphate (0.5% by mass of the second material) was added thereto, and the mixture was treated at 300 r / min for 30 minutes. A second composite solution (0.25% by mass of the second material) was added dropwise thereto. Then, a sodium hydroxide solution with a mass fraction of 8% was added, the pH was adjusted to 8, and the mixture was heat-treated at 40° C. for 100 minutes. After filtration, the mixture was washed twice with deionized water and dried at 60° C. for 10 hours to obtain a base material.

[0035] Furthermore, the first composite solution is prepared by composite zirconium nitrate pentahydrate and water at a dosage ratio of 0.05 g / mL.

[0036] The second composite solution is prepared by mixing cerium nitrate hexahydrate and water at a dosage ratio of 0.02 g / mL.

[0037] In this embodiment, it should be noted that titanium dioxide was purchased from Shanghai Yuanjiang Chemical Co., Ltd.

[0038] The water-based resin is prepared by mixing water-based polyurethane resin and water-based acrylic resin in a mass ratio of 1.2:1.

[0039] In this embodiment, it should be noted that the waterborne polyurethane resin was purchased from Jining Fangyu Chemical Co., Ltd., and the waterborne acrylic resin was purchased from Changzhou Jien New Materials Co., Ltd.

[0040] The preparation process of functional additives is as follows:

[0041] Titanium dioxide was placed in deionized water at a dosage ratio of 0.02 g / mL and ultrasonically treated for 20 minutes. Polyvinyl pyrrolidone (0.5% by weight of the titanium dioxide) was added thereto, and the mixture was treated at 400 r / min for 20 minutes. Then, butyl titanate (70% by weight of the titanium dioxide) was added thereto, and stirring was continued for 60 minutes to obtain a first preformulation.

[0042] Tin tetrachloride was added to the mixed solution at a mass ratio of 0.15:1, stirred at 100 rpm for 5 minutes, the pH was adjusted to 8 with aqueous ammonia, and stirring was continued for 40 minutes to obtain a second preformulation;

[0043] The second preformulation was placed in the first preformulation at a mass ratio of 1:3, stirred at 200 r / min for 120 min, placed at room temperature for 12 h, then placed in a drying oven and dried at 80° C. for 10 h. After grinding into powder, the powder was placed in a muffle furnace and calcined at 400° C. for 120 min to obtain a functional additive.

[0044] Furthermore, the mixed solution is prepared by mixing ethanol and water in a volume ratio of 1:1.

[0045] Among them, the surfactant is selected from ethoxylated acetylenic glycol.

[0046] In addition, this embodiment also provides a preparation process for the above-mentioned white ink heat transfer ink, comprising the following steps:

[0047] Accurately weigh the base material, water-based resin, polyvinyl pyrrolidone, functional additives, surfactant and water and set aside.

[0048] The base material, water-based resin, polyvinyl pyrrolidone, functional additives, surfactant and water are placed in a mixing device and mixed.

[0049] The mixing speed is 150 r / min and the mixing time is 20 min.

[0050] After the mixing is completed, the materials are discharged and then go through the inspection, measurement and packaging processes in sequence to finally obtain the finished product of white ink heat transfer ink.

[0051] Example 2

[0052] The preparation process of the white ink heat transfer ink provided in this embodiment is basically the same as that of Example 1, except that the specific raw material composition and specific preparation process of the white ink heat transfer ink in this embodiment are different. The specific raw material composition and specific preparation process of the white ink heat transfer ink in this embodiment are as follows:

[0053] A special ink formula for white ink heat transfer is composed of the following raw materials in parts by weight: 20 to 30 parts of a base material, 27 parts of a water-based resin, 4 parts of polyvinyl pyrrolidone, 6 parts of a functional additive, 2 parts of a surfactant and 75 parts of water.

[0054] The preparation process of the base material is as follows:

[0055] Titanium dioxide was placed in deionized water at a dosage ratio of 0.07 g / mL and ultrasonically treated for 25 minutes. Sodium hexametaphosphate (1% by weight of the titanium dioxide) was added thereto, and the mixture was treated at 350 r / min for 35 minutes. A first composite solution (0.3% by weight of the titanium dioxide) was then added dropwise thereto. A 9% by weight sodium hydroxide solution was then added, and the pH was adjusted to 9. The mixture was heat-treated at 45° C. for 110 minutes. After suction filtration, the mixture was washed three times with deionized water and dried at 70° C. for 12 hours to obtain a first material.

[0056] Polyethylene glycol PEG-400 was placed in ethanol at a mass ratio of 0.1:1, and treated at 170 r / min for 15 minutes. Then, 105% of the first material by mass was added thereto, and the mixture was treated at 55° C. and 250 r / min for 130 minutes. Then, the mixture was dried at 45° C. to constant weight to obtain a second material;

[0057] The second material was placed in deionized water at a dosage ratio of 0.04 g / mL and ultrasonically treated for 25 minutes. Sodium hexametaphosphate (1% by mass of the second material) was added thereto, and the mixture was treated at 350 r / min for 35 minutes. A second composite solution (0.3% by mass of the second material) was added dropwise thereto. Then, a sodium hydroxide solution with a mass fraction of 9% was added, the pH was adjusted to 9, and the mixture was heat-treated at 45° C. for 110 minutes. After filtration, the mixture was washed three times with deionized water and dried at 70° C. for 12 hours to obtain a base material.

[0058] Furthermore, the first composite solution is prepared by composite zirconium nitrate pentahydrate and water at a dosage ratio of 0.07 g / mL.

[0059] The second composite solution is prepared by mixing cerium nitrate hexahydrate and water at a dosage ratio of 0.04 g / mL.

[0060] In this embodiment, it should be noted that titanium dioxide was purchased from Shanghai Yuanjiang Chemical Co., Ltd.

[0061] The water-based resin is prepared by mixing water-based polyurethane resin and water-based acrylic resin in a mass ratio of 1.4:1.

[0062] In this embodiment, it should be noted that the waterborne polyurethane resin was purchased from Jining Fangyu Chemical Co., Ltd., and the waterborne acrylic resin was purchased from Changzhou Jien New Materials Co., Ltd.

[0063] The preparation process of functional additives is as follows:

[0064] Titanium dioxide was placed in deionized water at a dosage ratio of 0.07 g / mL and ultrasonically treated for 25 minutes. Polyvinyl pyrrolidone (0.7% by weight of the titanium dioxide) was added thereto, and the mixture was treated at 450 r / min for 25 minutes. Then, butyl titanate (75% by weight of the titanium dioxide) was added thereto, and stirring was continued for 75 minutes to obtain a first preformulation.

[0065] Tin tetrachloride was added to the mixed solution at a mass ratio of 0.2:1, stirred at 110 rpm for 7 minutes, the pH was adjusted to 9 with aqueous ammonia, and stirring was continued for 45 minutes to obtain a second preformulation;

[0066] The second preformulation was placed in the first preformulation at a mass ratio of 1:4, stirred at 220 r / min for 135 minutes, placed at room temperature for 13 hours, then placed in a drying oven and dried at 90°C for 11 hours. After grinding into powder, it was placed in a muffle furnace and calcined at 500°C for 135 minutes to obtain a functional additive.

[0067] Furthermore, the mixed solution is prepared by mixing ethanol and water in a volume ratio of 2:1.

[0068] Wherein, the surfactant is propoxylated acetylene glycol.

[0069] In addition, this embodiment also provides a preparation process for the above-mentioned white ink heat transfer ink, comprising the following steps:

[0070] Accurately weigh the base material, water-based resin, polyvinyl pyrrolidone, functional additives, surfactant and water and set aside.

[0071] The base material, water-based resin, polyvinyl pyrrolidone, functional additives, surfactant and water are placed in a mixing device and mixed.

[0072] The mixing speed is 175 r / min and the mixing time is 30 min.

[0073] After the mixing is completed, the materials are discharged and then go through the inspection, measurement and packaging processes in sequence to finally obtain the finished product of white ink heat transfer ink.

[0074] Example 3

[0075] The preparation process of the white ink heat transfer ink provided in this embodiment is basically the same as that of Example 1, except that the specific raw material composition and specific preparation process of the white ink heat transfer ink in this embodiment are different. The specific raw material composition and specific preparation process of the white ink heat transfer ink in this embodiment are as follows:

[0076] A special ink formula for white ink heat transfer is composed of the following raw materials in parts by weight: 30 parts of base material, 30 parts of water-based resin, 5 parts of polyvinyl pyrrolidone, 8 parts of functional additives, 3 parts of surfactant and 100 parts of water.

[0077] The preparation process of the base material is as follows:

[0078] Titanium dioxide was placed in deionized water at a dosage ratio of 0.12 g / mL and ultrasonically treated for 30 minutes. Sodium hexametaphosphate (1.5% by weight of the titanium dioxide) was added thereto, and the mixture was treated at 400 r / min for 40 minutes. A first composite solution (0.5% by weight of the titanium dioxide) was then added dropwise thereto. A 10% by weight sodium hydroxide solution was then added, and the pH was adjusted to 9. The mixture was heat-treated at 50° C. for 120 minutes. After suction filtration, the mixture was washed four times with deionized water and dried at 80° C. for 14 hours to obtain a first material.

[0079] Polyethylene glycol PEG-400 is placed in ethanol at a mass ratio of 0.15:1, and treated at 220 r / min for 20 minutes. Then, 110% of the mass of the first material is added thereto, and the mixture is treated at 60° C. and 300 r / min for 150 minutes, and then dried at 50° C. to constant weight to obtain a second material;

[0080] The second material was placed in deionized water at a dosage ratio of 0.08 g / mL and ultrasonically treated for 30 minutes, 1.5% of the mass of the second material sodium hexametaphosphate was added thereto, and the mixture was treated at 400 r / min for 40 minutes, and a second composite solution with a mass fraction of 0.5% of the second material was added dropwise thereto. Then, a sodium hydroxide solution with a mass fraction of 10% was added, the pH was adjusted to 9, and the mixture was heat-treated at 50° C. for 120 minutes. After filtration, the mixture was washed with deionized water 4 times and dried at 80° C. for 14 hours to obtain a base material.

[0081] Furthermore, the first composite solution is prepared by composite zirconium nitrate pentahydrate and water at a dosage ratio of 0.1 g / mL.

[0082] The second composite solution is prepared by mixing cerium nitrate hexahydrate and water at a dosage ratio of 0.08 g / mL.

[0083] In this embodiment, it should be noted that titanium dioxide was purchased from Shanghai Yuanjiang Chemical Co., Ltd.

[0084] The water-based resin is prepared by mixing water-based polyurethane resin and water-based acrylic resin in a mass ratio of 1.8:1.

[0085] In this embodiment, it should be noted that the waterborne polyurethane resin was purchased from Jining Fangyu Chemical Co., Ltd., and the waterborne acrylic resin was purchased from Changzhou Jien New Materials Co., Ltd.

[0086] The preparation process of functional additives is as follows:

[0087] Titanium dioxide was placed in deionized water at a dosage ratio of 0.12 g / mL and ultrasonically treated for 30 minutes. Polyvinyl pyrrolidone (1% by weight of the titanium dioxide) was added thereto, and the mixture was stirred at 500 rpm for 30 minutes. Then, butyl titanate (80% by weight of the titanium dioxide) was added thereto, and stirring was continued for 90 minutes to obtain a first preformulation.

[0088] Tin tetrachloride was added to the mixed solution at a mass ratio of 0.25:1, stirred at 120 rpm for 10 minutes, the pH was adjusted to 9 with aqueous ammonia, and stirring was continued for 50 minutes to obtain a second preformulation;

[0089] The second preformulation was placed in the first preformulation at a mass ratio of 1:5, stirred at 240 r / min for 150 min, placed at room temperature for 14 h, then placed in a drying oven and dried at 100° C. for 12 h. After grinding into powder, the powder was placed in a muffle furnace and calcined at 600° C. for 150 min to obtain a functional additive.

[0090] Furthermore, the mixed solution is prepared by mixing ethanol and water in a volume ratio of 2:1.

[0091] Among them, the surfactant is ethoxylated acetylenediol.

[0092] In addition, this embodiment also provides a preparation process for the above-mentioned white ink heat transfer ink, comprising the following steps:

[0093] Accurately weigh the base material, water-based resin, polyvinyl pyrrolidone, functional additives, surfactant and water and set aside.

[0094] The base material, water-based resin, polyvinyl pyrrolidone, functional additives, surfactant and water are placed in a mixing device and mixed.

[0095] The mixing speed is 200 r / min and the mixing time is 40 min.

[0096] After the mixing is completed, the materials are discharged and then go through the inspection, measurement and packaging processes in sequence to finally obtain the finished product of white ink heat transfer ink.

[0097] Comparative Example 1: The difference from Example 1 is that an equal amount of titanium dioxide is used to replace the base material in this example.

[0098] Comparative Example 2: The difference from Example 1 is that this example does not contain a functional additive.

[0099] Performance test: The white ink heat transfer ink samples provided in Examples 1 to 3 and Comparative Examples 1 to 2 are respectively labeled as Examples 1 to 3 and Comparative Examples 1 to 2; and the relevant properties of the white ink heat transfer ink provided in Examples 1 to 3 and Comparative Examples 1 to 2 are respectively tested as follows:

[0100] 1. Stability Test: The ink is placed in a 60°C oven for 14 days, then removed from the oven and allowed to stand until it returns to room temperature. Viscosity change = (viscosity at high temperature for 14 days - viscosity at room temperature) / viscosity at room temperature.

[0101] 2. Antibacterial test: The test method uses Staphylococcus aureus and Escherichia coli, the culture medium is nutrient agar, the culture temperature is 37°C, the culture time is 24h, and the concentration of the bacterial suspension is 2.0×10 6 / ml~2.0×10 7 / ml, a solution containing a known bacterial concentration is placed on the sample sprayed with ink, and the sample is kept for a certain period of time (24h) and the number of surviving bacteria in the solution is observed.

[0102] The obtained test data are recorded in Table 1 and Table 2 below:

[0103] Table 1 Stability performance test results of each group of white ink heat transfer ink

[0104] Group Viscosity change rate (%) Example 1 group 2.45 Example 2 group 2.51 Example 3 group 2.47 Comparison group 1 7.12 Comparison of 2 groups 4.34

[0105] Table 2 Antibacterial performance test results of each group of white ink heat transfer ink

[0106]

[0107] Comparing and analyzing the relevant data in Tables 1 and 2 demonstrates that the white ink heat transfer ink prepared by the present invention not only exhibits good stability but also excellent antibacterial properties, effectively guaranteeing its quality. This demonstrates that the white ink heat transfer ink formula and preparation process provided by the present invention have broader market prospects and are more suitable for promotion.

[0108] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0109] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A special ink formula for white ink heat transfer, characterized in that: The invention is composed of the following raw materials in parts by weight: 20-30 parts of base material, 25-30 parts of water-based resin, 3-5 parts of polyvinyl pyrrolidone, 5-8 parts of functional additives, 1-3 parts of surfactant and 50-100 parts of water.

2. The special ink formula for white ink heat transfer according to claim 1, characterized in that: The preparation process of the base material is as follows: Titanium dioxide is placed in deionized water at a dosage ratio of 0.02 to 0.12 g / mL and ultrasonically treated for 20 to 30 minutes, sodium hexametaphosphate (0.5 to 1.5% by weight of the titanium dioxide) is added thereto, and the mixture is treated at 300 to 400 r / min for 30 to 40 minutes, and then a first composite solution (0.25 to 0.5% by weight of the titanium dioxide) is added dropwise thereto, and then a sodium hydroxide solution (8 to 10% by mass) is added thereto, and the pH is adjusted to 8 to 9. The mixture is heat-treated at 40 to 50° C. for 100 to 120 minutes, filtered, washed with deionized water for 2 to 4 times, and dried at 60 to 80° C. for 10 to 14 hours to obtain a first material; Polyethylene glycol PEG-400 is placed in ethanol at a mass ratio of 0.05 to 0.15:1, and treated at 120 to 220 r / min for 10 to 20 minutes. Then, 100 to 110% of the mass of the first material is added thereto, and the mixture is treated at 50 to 60° C. and 200 to 300 r / min for 120 to 150 minutes, and then dried at 40 to 50° C. to constant weight to obtain a second material; The second material is placed in deionized water at a dosage ratio of 0.02 to 0.08 g / mL and ultrasonically treated for 20 to 30 minutes, 0.5 to 1.5% of the mass of the second material is added thereto, and the mixture is treated at 300 to 400 r / min for 30 to 40 minutes, 0.25 to 0.5% of the mass of the second material is added thereto by a second composite solution, and then a sodium hydroxide solution with a mass fraction of 8 to 10% is added thereto, and the pH is adjusted to 8 to 9. The mixture is heat-treated at 40 to 50° C. for 100 to 120 minutes, filtered, washed with deionized water for 2 to 4 times, and dried at 60 to 80° C. for 10 to 14 hours to obtain a base material.

3. The special ink formula for white ink heat transfer according to claim 2, characterized in that: The first composite solution is prepared by compounding zirconium nitrate pentahydrate and water in a dosage ratio of 0.05 to 0.1 g / mL.

4. The special ink formula for white ink heat transfer according to claim 2, characterized in that: The second composite solution is prepared by compounding cerium nitrate hexahydrate and water in a dosage ratio of 0.02 to 0.08 g / mL.

5. The special ink formula for white ink heat transfer according to claim 1, characterized in that: The water-based resin is prepared by mixing water-based polyurethane resin and water-based acrylic resin in a mass ratio of 1.2 to 1.8:

1.

6. The special ink formula for white ink heat transfer according to claim 1, characterized in that: The preparation process of the functional additive is as follows: Titanium dioxide is placed in deionized water at a dosage ratio of 0.02 to 0.12 g / mL and ultrasonically treated for 20 to 30 minutes. Polyvinyl pyrrolidone (0.5 to 1% by weight of the titanium dioxide) is added thereto, and the mixture is treated at 400 to 500 r / min for 20 to 30 minutes. Then, butyl titanate (70 to 80% by weight of the titanium dioxide) is added thereto, and stirring is continued for 60 to 90 minutes to obtain a first preformulation. Add tin tetrachloride to the mixed solution at a mass ratio of 0.15 to 0.25:1, stir at 100 to 120 rpm for 5 to 10 minutes, adjust the pH to 8 to 9 with aqueous ammonia, and continue stirring for 40 to 50 minutes to obtain a second preformulation; The second preformulation is placed in the first preformulation at a mass ratio of 1:3-5, stirred at 200-240 r / min for 120-150 minutes, placed at room temperature for 12-14 hours, then placed in a drying oven, dried at 80-100° C. for 10-12 hours, ground into powder, placed in a muffle furnace, and calcined at 400-600° C. for 120-150 minutes to obtain a functional additive.

7. The special ink formula for white ink heat transfer according to claim 6, characterized in that: The mixed solution is prepared by mixing ethanol and water in a volume ratio of 1 to 2:

1.

8. The special ink formula for white ink heat transfer according to claim 1, characterized in that: The surfactant is selected from any one of ethoxylated acetylenediol and propoxylated acetylenediol.

9. The process for preparing a white ink special for heat transfer according to any one of claims 1 to 8, characterized in that: The following steps are involved: Accurately weigh the base material, water-based resin, polyvinyl pyrrolidone, functional additives, surfactant and water and set aside; The base material, water-based resin, polyvinyl pyrrolidone, functional additives, surfactant and water are placed in a mixing device and mixed; After the mixing is completed, the materials are discharged and then go through the inspection, measurement and packaging processes in sequence to finally obtain the finished product of white ink heat transfer ink.

10. The process for preparing a special white ink for heat transfer according to claim 9, characterized in that: The mixing speed is 150-200 r / min, and the mixing time is 20-40 min.

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