A quick-drying type heat sublimation transfer paper and a production process thereof

Abstract

This invention relates to the field of transfer paper production technology, specifically to a fast-drying sublimation transfer paper and its production process. The invention grafts 3-methoxy-4-hydroxybenzaldehyde onto the surface of nano-titanium dioxide, resulting in an antibacterial agent with excellent antibacterial properties through the synergistic effect of nano-titanium dioxide and 3-methoxy-4-hydroxybenzaldehyde. The use of this antibacterial agent effectively improves the antibacterial properties of the sublimation transfer paper, extending its service life to a certain extent. Furthermore, the functional filler provided by this invention accelerates the penetration of moisture into the interior of the sublimation transfer paper, allowing moisture to better pass through the base paper and thus accelerating the drying speed of the base paper. Its synergistic effect with calcium silicate further enhances the drying speed of the sublimation transfer technology, better meeting the requirements of rapid printing.

Description

Technical Field

[0001] This invention relates to the field of transfer paper production technology, specifically to a fast-drying thermal sublimation transfer paper and its production process. Background Technology

[0002] Sublimation transfer is a new process that uses an inkjet printer filled with thermal transfer ink to print images such as portraits, landscapes, and text onto sublimation transfer paper in a mirror-image reverse manner. The paper is then heated to about 200°C by a thermal transfer device, causing the thermal transfer ink on the paper to vaporize and penetrate into the substrate, thus realistically transferring the image and colors from the paper onto materials such as textiles, ceramic cups, ceramic plates, ceramic slabs, and metals.

[0003] A method for manufacturing fast-drying sublimation paper is disclosed in patent application number CN201710770251.1, entitled "A Manufacturing Method for Fast-Drying Sublimation Paper". This method relates to the field of sublimation transfer paper manufacturing and can resolve the contradiction between transfer rate and drying speed, thereby accelerating the drying process. The invention includes the following steps: selecting a base paper with strong water resistance; firstly, applying a sublimation transfer ink coating to the front side of the base paper; then, applying a coating to the back side of the base paper to improve its water absorption. The adhesive of the back coating is water + surfactant or water + starch + surfactant, wherein the surfactant has a mass percentage of 0.5%-5%, and the starch has a mass percentage of 0.5%-3%.

[0004] While the sublimation paper manufactured according to the aforementioned patent documents has the advantage of fast drying speed, its mechanical properties and antibacterial properties are relatively insufficient, which to some extent shortens its service life and affects its quality. Therefore, this invention provides a fast-drying sublimation transfer paper and its manufacturing process! Summary of the Invention

[0005] The purpose of this invention is to provide a fast-drying sublimation transfer paper and its manufacturing process. The produced sublimation transfer paper not only has excellent mechanical properties but also good antibacterial properties, which extends its service life to a certain extent. Furthermore, the use of functional fillers can accelerate the penetration of moisture into the interior of the sublimation transfer paper, allowing moisture to better pass through the base paper and thus speeding up the drying speed of the base paper. In synergy with calcium silicate, it further enhances the drying speed of the sublimation transfer technology, better meeting the requirements of rapid printing.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] In a first aspect, the present invention provides a manufacturing process for fast-drying thermal sublimation transfer paper, comprising the following steps:

[0008] Step 1: Bleached softwood pulp and hardwood pulp are separately fed into a pulper and broken down into bleached softwood pulp and hardwood pulp with a concentration of 3-5 wt% respectively. Then, they are pulped separately using a series double-disc mill. The bleached softwood pulp and hardwood pulp obtained after pulping are pumped into a mixing tank at a weight ratio of 1:2-3. After thorough mixing, CTMP chemimechanical pulp is added and mechanically mixed evenly to obtain a mixed pulp.

[0009] Step 2: Pump the mixed pulp into a stainless steel mixing tank, and add potassium aluminum sulfate dodecahydrate, wet strength agent, sizing agent, and functional filler in sequence. After mixing and stirring evenly, the resulting compound pulp is processed through purification, wire forming, controlled wire dewatering, forming, pressing, surface sizing, drying, and soft calendering finishing processes to obtain transfer base paper. The amounts of potassium aluminum sulfate dodecahydrate, wet strength agent, sizing agent, and functional filler added are 0.8-3%, 2-4%, 0.2-0.5%, and 10-20% of the total dry pulp mass, respectively.

[0010] Step 3: Coat the front side of the transfer base paper obtained in Step 2 with a top coat coating. After coating, transfer it to a drying equipment for drying. After drying, coat the other side of the transfer base paper with a bottom coat coating, and then transfer it to a drying equipment for drying. The solid content of the top coat coating is 40-45%, and the solid content of the bottom coat coating is 10-15%.

[0011] The topcoat is made from the following raw materials in parts by weight: 500-600 parts water, 60-70 parts sodium carboxymethyl cellulose, 15-20 parts starch and 10-15 parts calcium silicate;

[0012] The underlying coating is made from the following raw materials in parts by weight: 60-80 parts water, 0.5-0.8 parts antibacterial agent, 80-90 parts nano zinc oxide, 25-35 parts sodium carboxymethyl cellulose, and 0.5-1.0 parts polyamide-polyurea resin with a solid content of 40%.

[0013] The adhesive solution used for backing treatment is made from the following raw materials in parts by weight: 90-100 parts water, 0.5-1.0 parts sodium carboxymethyl cellulose and 0.8-1.5 parts antibacterial agent;

[0014] Step 4: The transfer paper after coating and drying in Step 3 is fed into the adhesive backing equipment. After adhesive backing, the paper temperature is adjusted and balanced. Then, it goes through soft calendering and finishing and winding processes in sequence to finally obtain the fast-drying thermal sublimation transfer paper.

[0015] Furthermore, the beating degrees of the bleached softwood pulp and hardwood pulp are 15-20°SR and 35-40°SR, respectively.

[0016] Furthermore, the CTMP chemimechanical pulp has a freeness of 22–32°SR, and its dosage is 2–6 times that of bleached softwood pulp.

[0017] Furthermore, the coniferous wood is any one of Masson pine, larch, and spruce; the broad-leaved wood is any one of birch, maple, poplar, and linden.

[0018] Furthermore, the wet strength agent is selected from any one of polyacrylamide resin, polyethyleneimine resin, and epichlorohydrin.

[0019] Furthermore, the coating method can be any one of roller coating, metering rod coating, air knife coating, doctor blade coating, or curtain coating.

[0020] Furthermore, the sizing agent is selected from any one of cationic starch, carboxymethyl cellulose, alkyl ketone dimer, alkenyl succinic anhydride, and cationic rosin gum.

[0021] Furthermore, the preparation method of the antibacterial agent is as follows: Nano-titanium dioxide is uniformly dispersed in an ethanol dispersion of 3-aminopropylmethyldioxysilane with a volume concentration of 30-40% at a weight ratio of 20-50 g / L. Then, it is transferred to a high-speed disperser and mixed at a speed of 1000-1500 r / min for 10-15 min. After mixing, it is washed and dried sequentially. The resulting solid material is added to anhydrous ethanol at a solid-liquid ratio of 50-80 g / L. Then, 10-20% by mass of 3-methoxy-4-hydroxybenzaldehyde is added, and the mixture is stirred and reacted at a temperature of 40-50°C for 3-5 h. After the reaction is completed, the resulting product components are filtered, washed, and dried sequentially. The final product is the antibacterial agent.

[0022] Furthermore, the functional filler is composed of montmorillonite, talc, microcrystalline cellulose and chitosan in a mass ratio of 1:2-4:0.2-0.5:0.6-0.8.

[0023] Secondly, the present invention provides a fast-drying sublimation transfer paper, which is produced using the production process described above.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. In this invention, 3-aminopropylmethyldioxysilane is used to modify nano-titanium dioxide, causing the two to be chemically bonded. Ultimately, 3-aminopropylmethyldioxysilane is successfully grafted onto the surface of the nano-titanium dioxide to obtain a solid material. The obtained solid material is added to anhydrous ethanol, and then 3-methoxy-4-hydroxybenzaldehyde is added. Through stirring, the 3-methoxy-4-hydroxybenzaldehyde reacts chemically with the relevant active groups on the surface of the nano-titanium dioxide, ultimately successfully grafting 3-methoxy-4-hydroxybenzaldehyde onto the surface of the nano-titanium dioxide. The synergistic effect of nano-titanium dioxide and 3-methoxy-4-hydroxybenzaldehyde results in an antibacterial agent with excellent antibacterial properties. The use of this antibacterial agent can effectively improve the antibacterial properties of thermal sublimation transfer paper and extend its service life to a certain extent.

[0026] 2. The functional filler provided by this invention can accelerate the penetration of moisture into the interior of the sublimation transfer paper, allowing moisture to pass through the sublimation transfer base paper better, thereby accelerating the drying speed of the sublimation transfer base paper. It works synergistically with calcium silicate to further improve the drying speed of the sublimation transfer technology, and can better meet the requirements of rapid printing. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] A production process for fast-drying sublimation transfer paper includes the following steps:

[0030] Step 1: Bleached softwood pulp and hardwood pulp are separately fed into a pulper and broken down into bleached softwood pulp and hardwood pulp with a concentration of 3wt% respectively. Then, they are pulped separately using a series double-disc mill. The bleached softwood pulp and hardwood pulp obtained after pulping are pumped into a mixing tank at a weight ratio of 1:2. After thorough mixing, CTMP chemimechanical pulp is added and mechanically mixed evenly to obtain a mixed pulp.

[0031] The beating degrees of bleached softwood pulp and hardwood pulp are 15°SR and 35°SR, respectively.

[0032] The freeness of CTMP chemimechanical pulp is 22°SR, and its dosage is twice that of bleached softwood pulp; the softwood is Masson pine; the broadwood is birch.

[0033] Step 2: Pump the mixed pulp into a stainless steel mixing tank, and add potassium aluminum sulfate dodecahydrate, wet strength agent, sizing agent, and functional filler in sequence. After mixing and stirring evenly, the resulting compound pulp is processed through purification, wire forming, controlled wire dewatering, forming, pressing, surface sizing, drying, and soft calendering finishing processes to obtain transfer base paper. The amounts of potassium aluminum sulfate dodecahydrate, wet strength agent, sizing agent, and functional filler added are 0.8%, 2%, 0.2%, and 10% of the total dry pulp mass, respectively.

[0034] Among them, the wet strength agent is polyacrylamide resin; the coating method is roller coating; the sizing agent is cationic starch; and the functional filler is a compound of montmorillonite, talc, microcrystalline cellulose and chitosan in a mass ratio of 1:2:0.2:0.6.

[0035] Step 3: Apply a top coat coating to the front side of the transfer base paper obtained in Step 2. After coating, transfer it to a drying equipment for drying. After drying, apply a bottom coat coating to the other side of the transfer base paper and then transfer it to a drying equipment for drying. The solid content of the top coat coating is 40%, and the solid content of the bottom coat coating is 10%.

[0036] The topcoat is made from the following raw materials in parts by weight: 500 parts water, 60 parts sodium carboxymethyl cellulose, 15 parts starch and 10 parts calcium silicate;

[0037] The base coat is made from the following raw materials in parts by weight: 60 parts water, 0.5 parts antibacterial agent, 80 parts nano zinc oxide, 25 parts sodium carboxymethyl cellulose, and 0.5 parts polyamide polyurea resin with a solid content of 40%.

[0038] The adhesive solution used for backing treatment is made from the following raw materials in parts by weight: 90 parts water, 0.5 parts sodium carboxymethyl cellulose and 0.8 parts antibacterial agent;

[0039] Step 4: The transfer paper after coating and drying in Step 3 is fed into the adhesive backing equipment. After adhesive backing, the paper temperature is adjusted and balanced. Then, it goes through soft calendering and finishing and winding processes in sequence to finally obtain the fast-drying thermal sublimation transfer paper.

[0040] The preparation method of the antibacterial agent is as follows: Nano-titanium dioxide is uniformly dispersed in an ethanol dispersion of 30% (volume concentration) of 3-aminopropylmethyldioxysilane at a weight ratio of 20 g / L. Then, it is transferred to a high-speed disperser and mixed at 1000 r / min for 10 min. After mixing, it is washed and dried sequentially. The resulting solid material is added to anhydrous ethanol at a solid-liquid ratio of 50 g / L. Then, 10% (by mass) of 3-methoxy-4-hydroxybenzaldehyde is added, and the mixture is stirred and reacted at 40℃ for 3 h. After the reaction is completed, the resulting product components are filtered, washed, and dried sequentially. The final product is the antibacterial agent.

[0041] Example 2

[0042] A production process for fast-drying sublimation transfer paper includes the following steps:

[0043] Step 1: Bleached softwood pulp and hardwood pulp are separately fed into a pulper and broken down into bleached softwood pulp and hardwood pulp with a concentration of 4wt% respectively. Then, they are pulped separately using a series double-disc mill. The bleached softwood pulp and hardwood pulp obtained after pulping are pumped into a mixing tank at a weight ratio of 1:2.5. After thorough mixing, CTMP chemimechanical pulp is added and mechanically mixed evenly to obtain a mixed pulp.

[0044] The beating degrees of bleached softwood pulp and hardwood pulp are 20°SR and 40°SR, respectively.

[0045] The freeness of CTMP chemimechanical pulp is 28°SR, and its dosage is 4 times that of bleached softwood pulp; the softwood is larch; the broadwood is maple.

[0046] Step 2: Pump the mixed pulp into a stainless steel mixing tank, and add potassium aluminum sulfate dodecahydrate, wet strength agent, sizing agent, and functional filler in sequence. After mixing and stirring evenly, the resulting compound pulp is processed through purification, wire forming, controlled wire dewatering, forming, pressing, surface sizing, drying, and soft calendering finishing processes to obtain transfer base paper. The amounts of potassium aluminum sulfate dodecahydrate, wet strength agent, sizing agent, and functional filler added are 2%, 3%, 0.4%, and 15% of the total dry pulp mass, respectively.

[0047] Among them, the wet strength agent is polyethyleneimine resin; the coating method is metering rod coating; the sizing agent is carboxymethyl cellulose; and the functional filler is a compound of montmorillonite, talc, microcrystalline cellulose and chitosan in a mass ratio of 1:3:0.4:0.7.

[0048] Step 3: Apply a top coat coating to the front side of the transfer base paper obtained in Step 2. After coating, transfer it to a drying equipment for drying. After drying, apply a bottom coat coating to the other side of the transfer base paper and then transfer it to a drying equipment for drying. The solid content of the top coat coating is 40%, and the solid content of the bottom coat coating is 10%.

[0049] The topcoat is made from the following raw materials in parts by weight: 550 parts water, 65 parts sodium carboxymethyl cellulose, 15 parts starch and 10 parts calcium silicate;

[0050] The base coat is made from the following raw materials in parts by weight: 70 parts water, 0.6 parts antibacterial agent, 85 parts nano zinc oxide, 30 parts sodium carboxymethyl cellulose, and 0.8 parts polyamide polyurea resin with a solid content of 40%.

[0051] The adhesive solution used for backing treatment is made from the following raw materials in parts by weight: 95 parts water, 0.8 parts sodium carboxymethyl cellulose and 1.2 parts antibacterial agent;

[0052] Step 4: The transfer paper after coating and drying in Step 3 is fed into the adhesive backing equipment. After adhesive backing, the paper temperature is adjusted and balanced. Then, it goes through soft calendering and finishing and winding processes in sequence to finally obtain the fast-drying thermal sublimation transfer paper.

[0053] The preparation method of the antibacterial agent is as follows: Nano-titanium dioxide is uniformly dispersed in an ethanol dispersion of 3-aminopropylmethyldioxysilane with a volume concentration of 35% at a weight ratio of 40 g / L. Then, it is transferred to a high-speed disperser and mixed at a speed of 1200 r / min for 15 min. After mixing, it is washed and dried sequentially. The resulting solid material is added to anhydrous ethanol at a solid-liquid ratio of 60 g / L. Then, 15% by mass of 3-methoxy-4-hydroxybenzaldehyde is added, and the mixture is stirred and reacted at 45℃ for 4 h. After the reaction is completed, the resulting product components are filtered, washed, and dried sequentially. The final product is the antibacterial agent.

[0054] Example 3

[0055] A production process for fast-drying sublimation transfer paper includes the following steps:

[0056] Step 1: Bleached softwood pulp and hardwood pulp are separately fed into a pulper and broken down into bleached softwood pulp and hardwood pulp with a concentration of 5wt% respectively. Then, they are pulped separately using a series of double-disc mills. The bleached softwood pulp and hardwood pulp obtained after pulping are pumped into a mixing tank at a weight ratio of 1:3. After thorough mixing, CTMP chemimechanical pulp is added and mechanically mixed evenly to obtain a mixed pulp.

[0057] The beating degrees of bleached softwood pulp and hardwood pulp are 20°SR and 40°SR, respectively.

[0058] The freeness of CTMP chemimechanical pulp is 32°SR, and its dosage is 6 times that of bleached softwood pulp; the softwood is spruce; the broadwood is poplar.

[0059] Step 2: Pump the mixed pulp into a stainless steel mixing tank, and add potassium aluminum sulfate dodecahydrate, wet strength agent, sizing agent, and functional filler in sequence. After mixing and stirring evenly, the resulting compound pulp is processed through purification, wire forming, controlled wire dewatering, forming, pressing, surface sizing, drying, and soft calendering finishing processes to obtain transfer base paper. The amounts of potassium aluminum sulfate dodecahydrate, wet strength agent, sizing agent, and functional filler added are 3%, 4%, 0.5%, and 20% of the total dry pulp mass, respectively.

[0060] Among them, the wet strength agent is epichlorohydrin; the coating method is air knife coating; the sizing agent is alkyl ketene dimer; and the functional filler is a compound of montmorillonite, talc, microcrystalline cellulose and chitosan in a mass ratio of 1:4:0.5:0.8.

[0061] Step 3: Coat the front side of the transfer base paper obtained in Step 2 with a top coat coating. After coating, transfer it to a drying equipment for drying. After drying, coat the other side of the transfer base paper with a bottom coat coating, and then transfer it to a drying equipment for drying. The solid content of the top coat coating is 45%, and the solid content of the bottom coat coating is 15%.

[0062] The topcoat is made from the following raw materials in parts by weight: 600 parts water, 70 parts sodium carboxymethyl cellulose, 20 parts starch and 15 parts calcium silicate;

[0063] The base coat is made from the following raw materials in parts by weight: 80 parts water, 0.8 parts antibacterial agent, 90 parts nano zinc oxide, 35 parts sodium carboxymethyl cellulose, and 1.0 part polyamide polyurea resin with a solid content of 40%.

[0064] The adhesive solution used for backing treatment is made from the following raw materials in parts by weight: 100 parts water, 1.0 part sodium carboxymethyl cellulose and 1.5 parts antibacterial agent;

[0065] Step 4: The transfer paper after coating and drying in Step 3 is fed into the adhesive backing equipment. After adhesive backing, the paper temperature is adjusted and balanced. Then, it goes through soft calendering and finishing and winding processes in sequence to finally obtain the fast-drying thermal sublimation transfer paper.

[0066] The preparation method of the antibacterial agent is as follows: Nano-titanium dioxide is uniformly dispersed in an ethanol dispersion of 3-aminopropylmethyldioxysilane with a volume concentration of 40% at a weight ratio of 50 g / L. Then, it is transferred to a high-speed disperser and mixed at a speed of 1500 r / min for 15 min. After mixing, it is washed and dried sequentially. The resulting solid material is added to anhydrous ethanol at a solid-liquid ratio of 80 g / L. Then, 20% by mass of 3-methoxy-4-hydroxybenzaldehyde is added, and the mixture is stirred and reacted at 50℃ for 5 h. After the reaction is completed, the resulting product components are filtered, washed, and dried sequentially. The final product is the antibacterial agent.

[0067] Performance testing: The relevant properties (including mechanical properties, transfer properties, and antibacterial properties) of the thermal sublimation transfer paper samples provided in Examples 1-3 were tested respectively, and the test data are recorded in the table below:

[0068]

[0069] By comparing and analyzing the relevant data in the table, it can be seen that the sublimation transfer paper produced by this invention not only has excellent mechanical properties but also good antibacterial properties, which extends its service life to a certain extent. Furthermore, the use of functional fillers accelerates the penetration of moisture into the interior of the sublimation transfer paper, allowing moisture to better pass through the base paper and thus speeding up the drying process. Its synergistic effect with calcium silicate further enhances the drying speed of the sublimation transfer technology, better meeting the requirements of rapid printing. Therefore, this indicates that the fast-drying sublimation transfer paper and its production process provided by this invention have a broader market prospect and are more suitable for widespread application.

[0070] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above 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 one or more embodiments or examples.

[0071] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A production process for fast-drying thermal sublimation transfer paper, characterized in that, Includes the following steps: Step 1: Bleached softwood pulp and hardwood pulp are separately fed into a pulper and broken down into bleached softwood pulp and hardwood pulp with a concentration of 3-5 wt% respectively. Then, they are pulped separately using a series double-disc mill. The bleached softwood pulp and hardwood pulp obtained after pulping are pumped into a mixing tank at a weight ratio of 1:2-3. After thorough mixing, CTMP chemimechanical pulp is added and mechanically mixed evenly to obtain a mixed pulp. Step 2: Pump the mixed pulp into a stainless steel mixing tank, and add potassium aluminum sulfate dodecahydrate, wet strength agent, sizing agent, and functional filler in sequence. After mixing and stirring evenly, the resulting compound pulp is processed sequentially through purification, wire forming, controlled wire dewatering, forming, pressing, surface sizing, drying, and soft calendering finishing processes to obtain transfer base paper. The amounts of potassium aluminum sulfate dodecahydrate, wet strength agent, sizing agent, and functional filler added are 0.8-3%, 2-4%, 0.2-0.5%, and 10-20% of the total dry pulp mass, respectively. Step 3: Apply a topcoat coating to the front side of the transfer base paper obtained in Step 2. After coating, transfer it to a drying device for drying. After drying, apply a bottom coat coating to the other side of the transfer base paper, and then transfer it to a drying device for drying. The solid content of the topcoat coating is 40-45%, and the solid content of the bottom coat coating is 10-15%. The topcoat is made from the following raw materials in parts by weight: 500-600 parts water, 60-70 parts sodium carboxymethyl cellulose, 15-20 parts starch and 10-15 parts calcium silicate; The underlying coating is made from the following raw materials in parts by weight: 60-80 parts water, 0.5-0.8 parts antibacterial agent, 80-90 parts nano zinc oxide, 25-35 parts sodium carboxymethyl cellulose, and 0.5-1.0 parts polyamide polyurea resin with a solid content of 40%. The adhesive solution used for backing treatment is made from the following raw materials in parts by weight: 90-100 parts water, 0.5-1.0 parts sodium carboxymethyl cellulose and 0.8-1.5 parts antibacterial agent; The antibacterial agent is prepared as follows: Nano-titanium dioxide is uniformly dispersed in an ethanol dispersion of 3-aminopropylmethyldioxysilane with a volume concentration of 30-40% at a weight ratio of 20-50 g / L. The dispersion is then transferred to a high-speed disperser and mixed at a speed of 1000-1500 r / min for 10-15 min. After mixing, the dispersion is washed and dried. The resulting solid material is added to anhydrous ethanol at a solid-liquid ratio of 50-80 g / L. Then, 10-20% (by mass) of 3-methoxy-4-hydroxybenzaldehyde is added, and the mixture is stirred and reacted at 40-50°C for 3-5 h. After the reaction is complete, the resulting product is filtered, washed, and dried sequentially to obtain the final antibacterial agent. Step 4: The transfer paper after coating and drying in Step 3 is fed into the adhesive backing equipment. After adhesive backing, the paper temperature is adjusted and balanced. Then, it goes through soft calendering and finishing and winding processes in sequence to finally obtain the fast-drying thermal sublimation transfer paper.

2. The production process of a fast-drying thermal sublimation transfer paper according to claim 1, characterized in that: The beating degrees of the bleached softwood pulp and hardwood pulp are 15-20°SR and 35-40°SR, respectively.

3. The production process of a fast-drying thermal sublimation transfer paper according to claim 1, characterized in that: The CTMP chemimechanical pulp has a freeness of 22-32°SR and its dosage is 2-6 times that of bleached softwood pulp.

4. The production process of a fast-drying thermal sublimation transfer paper according to claim 1, characterized in that: The coniferous wood is any one of Masson pine, larch, and spruce; the broad-leaved wood is any one of birch, maple, poplar, and linden.

5. The production process of a fast-drying thermal sublimation transfer paper according to claim 1, characterized in that: The wet strength agent is selected from either polyacrylamide resin or polyethyleneimine resin.

6. The production process of a fast-drying thermal sublimation transfer paper according to claim 1, characterized in that: The coating method can be any one of roller coating, metering bar coating, air knife coating, doctor blade coating, or curtain coating.

7. The production process of a fast-drying thermal sublimation transfer paper according to claim 1, characterized in that: The sizing agent is selected from any one of cationic starch, carboxymethyl cellulose, alkyl ketone dimer, alkenyl succinic anhydride, and cationic rosin.

8. The production process of a fast-drying thermal sublimation transfer paper according to claim 1, characterized in that: The functional filler is composed of montmorillonite, talc, microcrystalline cellulose and chitosan in a mass ratio of 1:2-4:0.2-0.5:0.6-0.

8.

9. A fast-drying sublimation transfer paper, characterized in that, It is produced using the production process of a fast-drying thermal sublimation transfer paper as described in any one of claims 1 to 8.

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