Thermal sublimation photographic paper and preparation method thereof

Abstract

The invention discloses thermal dye sublimation photographic paper and a preparation method thereof, the thermal dye sublimation photographic paper comprises a base material, a bottom layer and an image receiving layer which are stacked, and the image receiving layer comprises 5-25 parts by weight of resin emulsion, 0.5-5 parts by weight of a dye receiving accelerant, 0.5-5 parts by weight of modified silicone oil and 1-5 parts by weight of an emulsifier. By adopting the thermal dye sublimation photographic paper with the image receiving layer, volatilization of an organic solvent in the production process of the photographic paper can be reduced, operation is easy, environment friendliness is achieved, meanwhile, the receiving rate of dye in a colored tape in the printing process can be effectively increased, and then the color density of the photographic paper after printing is improved.

Description

Technical Field

[0001] The present application relates to the field of imaging technology, and in particular to thermal sublimation photographic paper and a preparation method thereof. Background Art

[0002] With the rapid development of digital photography, a variety of image output methods have grown and proliferated. In addition to traditional silver halide photo paper, inkjet printing, digital printing, and thermal sublimation printing are now available. Thermal sublimation photo paper boasts resolution comparable to silver halide photo paper and excellent weather resistance, making it particularly suitable for ID photos. The recent development of compact and lightweight thermal sublimation printers, which can be connected to mobile phones for direct printing, has further expanded the application of thermal sublimation printing. Thermal sublimation printing typically uses a combination of photo paper and ribbons to create images through multi-color sublimation overprinting. To increase the color density of sublimation transfer, organic solvents such as butanone and ethyl acetate are typically used as carriers in the coating solution during the production of thermal sublimation photo paper and ribbons. However, the use of organic solvents during the production process is highly volatile, requires high process requirements, and has a strong odor, which is not environmentally friendly. Therefore, the production technology for thermal sublimation photo paper needs further improvement.

[0003] It should be noted that the above statements are only used to provide background technical information related to this application and do not necessarily constitute prior art. Summary of the Invention

[0004] In its first aspect, the present application proposes a thermal sublimation photographic paper comprising: a laminated substrate, a bottom layer, and an image receiving layer, wherein the image receiving layer comprises: 5 to 25 parts by weight of a resin emulsion, 0.5 to 5 parts by weight of a dye-receiving accelerator, 0.5 to 5 parts by weight of a modified silicone oil, and 1 to 5 parts by weight of an emulsifier. The present application utilizes the formulation of this image receiving layer to prepare thermal sublimation photographic paper, which reduces the volatilization of organic solvents during the production process, is easy to operate, and is environmentally friendly. It also effectively improves the acceptance rate of dyes from the ribbon during printing, thereby increasing the color density of the printed paper.

[0005] In addition, the thermal sublimation photo paper according to the above embodiment of the present application may also have the following additional technical features:

[0006] In some embodiments of the present application, the particle size of the dye-receiving accelerator is 0.05 μm to 3 μm, which is beneficial to improving the dispersibility of the dye-receiving accelerator in the image receiving layer coating liquid system.

[0007] In some embodiments of the present application, the dye acceptance accelerator includes at least one of dibutyl phthalate, dibutyl sebacate, tributyl phosphate, dioctyl phthalate, caprylic acid capric glyceride, and triolein. This is beneficial for improving the acceptance rate of the dye in the ribbon during printing, thereby improving the color density of the printed paper.

[0008] In some embodiments of the present application, the resin emulsion includes at least one of a copolymer emulsion of vinyl chloride and vinylidene, a copolymer emulsion of vinyl chloride and vinyl acetate, a copolymer emulsion of vinyl chloride and acrylic acid, a copolymer emulsion of vinyl chloride and ethylene, or a copolymer emulsion of vinyl chloride and maleate. This improves the glossiness of the thermal sublimation paper while providing excellent adhesion to the printed layer.

[0009] In some embodiments of the present application, the modified silicone oil includes at least one of an alkyl-modified silicone oil, an ether-modified silicone oil, an epoxy-modified silicone oil, and an amino-modified silicone oil. This allows the coating liquid for the image receiving layer to be uniformly and stably present in an oil-in-water form, facilitating spreading during the coating process.

[0010] In some embodiments of the present application, the emulsifier includes at least one of sodium naphthalenesulfonate, sodium 3-isopropylnaphthalenesulfonate, sodium dodecylsulfonate, sodium dodecyl sulfate, Tween 20, Tween 80, and silk reel 60. This allows the coating liquid of the image receiving layer to be uniformly and stably present in an oil-in-water form, and facilitates spreading during the coating process.

[0011] In some embodiments of the present application, the thickness of the image receiving layer is 5 μm to 30 μm, thereby making the dye diffuse more evenly and improving the color density of the printed photographic paper.

[0012] In some embodiments of the present application, the base layer comprises at least one of an acrylic emulsion, a mixed emulsion of vinyl and acrylic acid, a polyurethane emulsion, and a polyester emulsion. This improves the fastness between the substrate and the image-receiving layer, while also imparting a certain degree of elasticity to the base layer, thereby achieving a more uniform color density during the printing and receiving of sublimation dyes.

[0013] In some embodiments of the present application, the thickness of the bottom layer is 0.5 μm to 10 μm, thereby achieving a transition between the substrate and the image receiving layer and improving the fastness between the substrate and the image receiving layer.

[0014] In some embodiments of the present application, the substrate includes at least one of base paper, coated paper, plastic-coated paper, polyethylene terephthalate, polyvinyl chloride, and polypropylene, thereby facilitating a wide range of material sources and reducing costs.

[0015] In a second aspect of the present application, the present application proposes a method for preparing thermal sublimation photo paper, comprising:

[0016] Mix 80 to 90 parts by weight of deionized water, 5 to 25 parts by weight of resin emulsion, 0.5 to 5 parts by weight of modified silicone oil, and 1 to 5 parts by weight of emulsifier to obtain a mixed solution;

[0017] mixing 0.5 to 5 parts by weight of a dye acceptance accelerator with the mixed solution to obtain a coating solution;

[0018] The base material and the coating liquid are sequentially coated on the surface of the substrate to obtain the thermal sublimation photo paper.

[0019] The present application prepares thermal sublimation photo paper through the above method, and the image receiving layer is a water-based formula, which reduces the volatilization of organic solvents during the production process of photo paper. It is environmentally friendly, non-flammable and non-explosive, safer, non-toxic and odorless, and healthier. It is also convenient to produce and has a simple process. The thermal sublimation photo paper obtained using this method can improve the color density after printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic structural diagram of thermal sublimation photo paper according to an embodiment of the present application.

[0022] Description of reference numerals:

[0023] 1-substrate, 2-bottom layer, 3-image receiving layer. DETAILED DESCRIPTION

[0024] The following describes the embodiments of the present application in detail. Examples of the embodiments are shown in the accompanying drawings, but unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repeated descriptions of substantially identical structures may be omitted. This is to avoid unnecessary lengthiness in the following description and to facilitate understanding by those skilled in the art. In addition, the drawings and the following description are provided to enable those skilled in the art to fully understand the present application and are not intended to limit the subject matter described in the claims.

[0025] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application; unless otherwise specified, the numerical values of the various parameters mentioned in this application can be measured using various measurement methods commonly used in the art (for example, they can be tested according to the methods given in the embodiments of this application).

[0026] The terms "include" and "have" in the description and claims of this application and any variations thereof are open expressions, that is, including the contents specified in this application but not excluding other contents.

[0027] In the description of this application, regardless of whether the word "about" or "approximately" is used, all numbers disclosed herein are approximate values. The value of each number may vary by less than 10% or by a reasonable difference considered by a person skilled in the art, such as 1%, 2%, 3%, 4% or 5%.

[0028] The "ranges" disclosed herein are defined in terms of lower and upper limits, where a given range is defined by selecting a lower limit and an upper limit, and the selected lower and upper limits define the boundaries of the particular range. Ranges defined in this manner can be inclusive or exclusive of the end values and can be combined arbitrarily, i.e., any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60 to 120 and 80 to 110 are listed for a particular parameter, it is understood that ranges of 60 to 110 and 80 to 120 are also contemplated. Furthermore, if minimum range values of 1 and 2 are listed, and if maximum range values of 3, 4, and 5 are listed, the following ranges are all contemplated: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4, and 2 to 5. In this application, unless otherwise indicated, the numerical range "a to b" is a shorthand representation of any combination of real numbers between a and b, where a and b are both real numbers. For example, a numerical range of "0-5" indicates that all real numbers between "0-5" are listed herein, and "0-5" is simply an abbreviation for these numerical combinations. Furthermore, when a parameter is expressed as an integer ≥ 2, this is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0029] In the description of this application, "A and / or B" may include the case of A alone, the case of B alone, or any of the cases of A and B, where A and B are only used for example, and may be any technical feature connected by "and / or" in this application.

[0030] In this application, the writing order of each step does not mean a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic. Unless otherwise specified, all steps of this application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or steps (b) and (a) performed sequentially. For example, it is mentioned that the method may also include step (c), indicating that step (c) can be added to the method in any order. For example, the method may include steps (a), (b) and (c), or steps (a), (c) and (b), or steps (c), (a) and (b), etc.

[0031] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0032] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0033] In the first aspect of the present application, the present application proposes a thermal sublimation photo paper, referring to Figure 1 The thermal sublimation photographic paper comprises: a laminated substrate 1, a bottom layer 2, and an image receiving layer 3. The image receiving layer comprises: 5 to 25 parts by weight of a resin emulsion, 0.5 to 5 parts by weight of a dye-receiving accelerator, 0.5 to 5 parts by weight of a modified silicone oil, and 1 to 5 parts by weight of an emulsifier. In this application, the image receiving layer is formulated as a water-based formulation, which can reduce the volatilization of organic solvents during the production process, making it easy to operate and environmentally friendly. In this formulation, the resin emulsion has good moldability and smoothness, providing the thermal sublimation photographic paper with a high gloss and excellent adhesion to the printed layer. The addition of the dye-receiving accelerator can effectively increase the acceptance rate of the dye in the ribbon during printing, thereby increasing the color density of the printed thermal sublimation photographic paper. The modified silicone oil and emulsifier can ensure that the coating liquid is uniformly and stably present in a water-in-oil form, facilitating its spreading during the coating process. The image receiving layer transitions through the bottom layer and can be coated on a variety of substrates, enriching the diverse selection of thermal sublimation photographic paper.

[0034] In addition, the thermal sublimation photo paper according to the above embodiment of the present application may also have the following additional technical features:

[0035] In some embodiments of the present application, the particle size of the dye-receiving accelerator is 0.05 μm to 3 μm, for example, 0.05 μm, 0.1 μm, 0.5 μm, 1 μm, 1.5 μm, 2 μm, 2.5 μm, or 3 μm. It is understood that in order to achieve a better match with the ribbon and a higher color density, the dye-receiving accelerator, which is highly compatible with the ribbon dye, is uniformly coated in the aqueous system through an oil-emulsion dispersion process. After the coating liquid is applied to form a coating, excellent color density can be achieved in thermal sublimation printing. The particle size of the dye-receiving accelerator within the above range is conducive to improving the dispersibility of the dye-receiving accelerator in the image receiving layer coating liquid system.

[0036] In some embodiments of the present application, the dye acceptance accelerator includes at least one of dibutyl phthalate, dibutyl sebacate, tributyl phosphate, dioctyl phthalate, caprylic acid capric glyceride, and triolein. This is beneficial for improving the acceptance rate of the dye in the ribbon during printing, thereby improving the color density of the printed paper.

[0037] In some embodiments of the present application, the resin emulsion includes at least one of a copolymer emulsion of vinyl chloride and vinylidene, a copolymer emulsion of vinyl chloride and vinyl acetate, a copolymer emulsion of vinyl chloride and acrylic acid, a copolymer emulsion of vinyl chloride and ethylene, or a copolymer emulsion of vinyl chloride and maleate. This improves the glossiness of the thermal sublimation paper while providing excellent adhesion to printed layers.

[0038] In some embodiments of the present application, the modified silicone oil includes at least one of an alkyl-modified silicone oil, an ether-modified silicone oil, an epoxy-modified silicone oil, and an amino-modified silicone oil. This allows the coating liquid for the image receiving layer to be uniformly and stably present in an oil-in-water form, facilitating spreading during the coating process.

[0039] In some embodiments of the present application, the emulsifier includes at least one of sodium naphthalenesulfonate, sodium 3-isopropylnaphthalenesulfonate, sodium dodecylsulfonate, sodium dodecyl sulfate, Tween 20, Tween 80, and Span 60. This allows the coating liquid of the image receiving layer to be uniformly and stably present in an oil-in-water form, facilitating spreading during the coating process.

[0040] In some embodiments of the present application, the thickness of the image receiving layer is 5 μm to 30 μm, for example, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm or 30 μm, etc. This allows the dye to diffuse more evenly and improves the color density of the printed paper.

[0041] In some embodiments of the present application, the base layer includes at least one of an acrylic emulsion, a mixed emulsion of vinyl and acrylic acid, a polyurethane emulsion, and a polyester emulsion. This improves the fastness between the substrate and the image-receiving layer while also imparting a certain degree of elasticity to the base layer, thereby achieving more uniform color density during the printing and receiving of sublimation dyes.

[0042] In some embodiments of the present application, the thickness of the bottom layer is 0.5 μm to 10 μm, for example, 0.5 μm, 1 μm, 2 μm, 4 μm, 6 μm, 8 μm, or 10 μm, etc. This can achieve a transition between the substrate and the image receiving layer, and improve the fastness between the substrate and the image receiving layer.

[0043] In some embodiments of the present application, the substrate includes at least one of base paper, coated paper, plastic-coated paper, polyethylene terephthalate (PET), polyvinyl chloride (PVC), and polypropylene (PP), thereby facilitating a wide range of material sources and reducing costs.

[0044] In a second aspect of the present application, the present application proposes a method for preparing thermal sublimation photo paper, comprising:

[0045] S1: 80 to 90 parts by weight of deionized water, 5 to 25 parts by weight of resin emulsion, 0.5 to 5 parts by weight of modified silicone oil, and 1 to 5 parts by weight of emulsifier are mixed to obtain a mixed solution.

[0046] In this step, the order of adding deionized water, resin emulsion, modified silicone oil and emulsifier and the mixing method are not specifically limited, as long as a uniform mixed liquid can be obtained, and can be flexibly selected according to actual conditions.

[0047] As an example, deionized water, resin emulsion, modified silicone oil, and emulsifier may be mixed according to a formula ratio and then stirred to obtain a uniform mixed liquid.

[0048] In some specific examples, deionized water can be 80 parts by weight, 82 parts by weight, 84 parts by weight, 86 parts by weight, 88 parts by weight or 90 parts by weight, etc.; the resin emulsion can be 5 parts by weight, 10 parts by weight, 15 parts by weight, 20 parts by weight or 25 parts by weight, etc.; the modified silicone oil can be 0.5 parts by weight, 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight or 5 parts by weight, etc.; the emulsifier can be 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight or 5 parts by weight, etc.

[0049] S2: 0.5 to 5 parts by weight of a dye-receiving accelerator are mixed with the mixed solution to obtain a coating solution.

[0050] As an example, the dye-receiving accelerator may be dispersed into the mixed liquid so that the dye-receiving accelerator is uniformly coated and dispersed in the coating liquid system of the image receiving layer.

[0051] S3: coating the base layer and the coating liquid on the surface of the substrate in sequence to obtain thermal sublimation photo paper.

[0052] As an example, acrylic emulsion, mixed emulsion of ethylene and acrylic acid, polyurethane emulsion or polyester emulsion can be coated on the surface of the substrate to form a base layer, and then the coating liquid is coated on the substrate coated with the base layer. After drying, the sublimation photo paper is obtained.

[0053] The present application prepares thermal sublimation photo paper through the above method, and the image receiving layer is a water-based formula, which reduces the volatilization of organic solvents during the production process of photo paper. It is environmentally friendly, non-flammable and non-explosive, safer, non-toxic and odorless, and healthier. It is also convenient to produce and has a simple process. The thermal sublimation photo paper obtained using this method can improve the color density after printing.

[0054] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0055] The present invention will be described below by way of specific examples. It should be noted that the following examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Where specific techniques or conditions are not specified in the examples, they are determined according to the techniques or conditions described in the literature in this area or according to the product specifications. Reagents or instruments not specified by manufacturer are all commercially available conventional products.

[0056] Example 1

[0057] (1) Deionized water, resin emulsion, modified silicone oil, and emulsifier were mixed uniformly according to the formula ratio in Table 1 to obtain a mixed solution;

[0058] (2) dispersing a dye-receiving accelerator into the mixed solution to obtain a coating solution;

[0059] (3) Polyurethane emulsion was coated on the surface of the base paper to form a 5 μm thick bottom layer, and the above coating liquid was coated on the side of the bottom layer away from the base paper to form a 20 μm thick image receiving layer. After drying and cutting, thermal sublimation photo paper was obtained.

[0060] Examples 2 to 5, Comparative Examples 1 to 4

[0061] The difference from Example 1 is that the formulation of the image receiving layer is different, as shown in Table 1 below.

[0062] Table 1 Image receiving layer formulation

[0063]

[0064]

[0065] Comparative Example 5

[0066] Solvent-based dye-sublimation coated photo paper.

[0067] Comparative Example 6

[0068] The difference from Example 1 is that there is no bottom layer.

[0069] Under the same test conditions, the sublimation photo papers obtained in the above examples and comparative examples were printed with standard color patches on the same sublimation printer. The maximum color densities of C (cyan), M (magenta), Y (yellow), and K (black) were tested. The test results are shown in Table 2 below.

[0070] Table 2 Color density test results

[0071] C M Y K Example 1 0.90 1.35 1.63 1.63 Example 2 0.92 1.38 1.65 1.62 Example 3 0.90 1.39 1.63 1.61 Example 4 0.90 1.32 1.64 1.60 Example 5 0.93 1.37 1.63 1.62 Comparative Example 1 0.71 0.92 0.98 0.87 Comparative Example 2 0.83 1.10 1.25 1.03 Comparative Example 3 0.81 1.09 1.13 0.98 Comparative Example 4 0.87 1.21 0.82 1.11 Comparative Example 5 0.90 1.35 1.62 1.61 Comparative Example 6 0.90 1.32 1.63 1.60

[0072] As can be seen from Table 1, compared with the comparative example, the thermal sublimation photo paper prepared using the image receiving layer formulation provided by the present application has a higher color density after printing, which is beneficial to improving the imaging effect of the photo.

[0073] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are merely examples, and any embodiments having substantially the same structure and effect as the technical concept within the scope of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the present application, any other embodiments that can be conceived by those skilled in the art and that combine some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A thermal sublimation photo paper, characterized in that: include: A substrate, a bottom layer and an image receiving layer are stacked, wherein the image receiving layer comprises: 5 to 25 parts by weight of a resin emulsion, 0.5 to 5 parts by weight of a dye receiving accelerator, 0.5 to 5 parts by weight of a modified silicone oil and 1 to 5 parts by weight of an emulsifier.

2. The thermal sublimation photo paper according to claim 1, characterized in that: The particle size of the dye receiving accelerator is 0.05 μm to 3 μm.

3. The thermal sublimation photographic paper according to claim 1 or 2, characterized in that: The dye receiving accelerator includes at least one of dibutyl phthalate, dibutyl sebacate, tributyl phosphate, dioctyl phthalate, caprylic and capric glyceride, and triolein.

4. The thermal sublimation photographic paper according to claim 1 or 2, characterized in that: The resin emulsion includes at least one of a copolymer emulsion of vinyl chloride and vinylidene, a copolymer emulsion of vinyl chloride and vinyl acetate, a copolymer emulsion of vinyl chloride and acrylic acid, a copolymer emulsion of vinyl chloride and ethylene, and a copolymer emulsion of vinyl chloride and maleate.

5. The thermal sublimation photographic paper according to claim 1 or 2, characterized in that: The modified silicone oil includes at least one of alkyl-modified silicone oil, ether-modified silicone oil, epoxy-modified silicone oil, and amino-modified silicone oil.

6. The thermal sublimation photographic paper according to claim 1 or 2, characterized in that: The emulsifier includes at least one of sodium naphthalenesulfonate, sodium 3-isopropylnaphthalenesulfonate, sodium dodecylsulfonate, sodium dodecylsulfate, Tween 20, Tween 80, and silk disk 60.

7. The thermal sublimation photographic paper according to claim 1 or 2, characterized in that: The image receiving layer has a thickness of 5 μm to 30 μm.

8. The thermal sublimation photographic paper according to claim 1 or 2, characterized in that: The bottom layer comprises at least one of acrylic emulsion, mixed emulsion of ethylene and acrylic acid, polyurethane emulsion, and polyester emulsion; and / or The thickness of the bottom layer is 0.5 μm to 10 μm.

9. The thermal sublimation photographic paper according to claim 1 or 2, characterized in that: The substrate comprises at least one of base paper, coated paper, plastic-coated paper, polyethylene terephthalate, polyvinyl chloride, and polypropylene.

10. A method for preparing the thermal sublimation photographic paper according to any one of claims 1 to 9, characterized in that: include: Mix 80 to 90 parts by weight of deionized water, 5 to 25 parts by weight of resin emulsion, 0.5 to 5 parts by weight of modified silicone oil, and 1 to 5 parts by weight of emulsifier to obtain a mixed solution; mixing 0.5 to 5 parts by weight of a dye acceptance accelerator with the mixed solution to obtain a coating solution; The base material and the coating liquid are sequentially coated on the surface of the substrate to obtain the thermal sublimation photo paper.

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