CN113931003A - Thermal sublimation transfer printing coating with uniform temperature rise and functional micromolecule preparation process thereof - Google Patents
Thermal sublimation transfer printing coating with uniform temperature rise and functional micromolecule preparation process thereof Download PDFInfo
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- CN113931003A CN113931003A CN202010671255.6A CN202010671255A CN113931003A CN 113931003 A CN113931003 A CN 113931003A CN 202010671255 A CN202010671255 A CN 202010671255A CN 113931003 A CN113931003 A CN 113931003A
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- 238000000859 sublimation Methods 0.000 title claims abstract description 45
- 230000008022 sublimation Effects 0.000 title claims abstract description 45
- 239000011248 coating agent Substances 0.000 title claims abstract description 42
- 238000000576 coating method Methods 0.000 title claims abstract description 42
- 238000010023 transfer printing Methods 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 44
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims abstract description 21
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 18
- YROFLNSNTBXOSJ-UHFFFAOYSA-N 4,4,4-triphenylbutane-1,2-diol Chemical compound C(C1=CC=CC=C1)(C1=CC=CC=C1)(C1=CC=CC=C1)CC(CO)O YROFLNSNTBXOSJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- VHYFNPMBLIVWCW-UHFFFAOYSA-N 4-Dimethylaminopyridine Chemical compound CN(C)C1=CC=NC=C1 VHYFNPMBLIVWCW-UHFFFAOYSA-N 0.000 claims abstract description 14
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 7
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 7
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims abstract description 7
- JBWKIWSBJXDJDT-UHFFFAOYSA-N triphenylmethyl chloride Chemical compound C=1C=CC=CC=1C(C=1C=CC=CC=1)(Cl)C1=CC=CC=C1 JBWKIWSBJXDJDT-UHFFFAOYSA-N 0.000 claims abstract description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 239000000839 emulsion Substances 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000000706 filtrate Substances 0.000 claims description 6
- 235000011187 glycerol Nutrition 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000012044 organic layer Substances 0.000 claims description 6
- -1 polyoxyethylene Polymers 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 3
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 3
- 241001330002 Bambuseae Species 0.000 claims description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000011425 bamboo Substances 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000012043 crude product Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 3
- 239000011118 polyvinyl acetate Substances 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M sodium bicarbonate Substances [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 3
- 239000008199 coating composition Substances 0.000 claims description 2
- 238000012546 transfer Methods 0.000 abstract description 47
- 239000002245 particle Substances 0.000 abstract description 6
- 239000000975 dye Substances 0.000 description 14
- 238000007731 hot pressing Methods 0.000 description 13
- 150000003384 small molecules Chemical class 0.000 description 6
- 238000007639 printing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000005160 1H NMR spectroscopy Methods 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/46—Non-macromolecular organic compounds
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/16—Preparation of ethers by reaction of esters of mineral or organic acids with hydroxy or O-metal groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C43/00—Ethers; Compounds having groups, groups or groups
- C07C43/02—Ethers
- C07C43/03—Ethers having all ether-oxygen atoms bound to acyclic carbon atoms
- C07C43/14—Unsaturated ethers
- C07C43/178—Unsaturated ethers containing hydroxy or O-metal groups
- C07C43/1782—Unsaturated ethers containing hydroxy or O-metal groups containing six-membered aromatic rings
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- D—TEXTILES; PAPER
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- D21H19/36—Coatings with pigments
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- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
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- D21H19/385—Oxides, hydroxides or carbonates
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- D—TEXTILES; PAPER
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- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/54—Starch
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- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
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- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
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- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
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Abstract
The invention discloses a thermal sublimation transfer printing coating with uniform temperature rise and a preparation process of functional micromolecules thereof, wherein the composition comprises the following components in parts by mass: 30-38 parts of 1, 2-dihydroxy-3-trityl-propane, 10-15 parts of nano silicon nitride, 8-13 parts of nano aluminum oxide, 28-35 parts of a film forming agent and 5-10 parts of a filler. The functional micromolecule 1, 2-dihydroxy-3-trityl-propane is prepared from tetrahydrofuran solution, glycerol, triphenylchloromethane, 4-dimethylaminopyridine, triethylamine and the like. Through the mode, the thermal sublimation transfer printing coating with uniform temperature rise and the preparation process of the functional micromolecule thereof are provided, the functional micromolecule material has a plurality of active sites, can simultaneously act with dye particles and high heat conduction materials, the heat conduction between the coating materials is more uniform, the dye molecules can be more efficiently released in the transfer printing process, the transfer rate is effectively improved, and the thermal sublimation performance of the coating is effectively improved.
Description
Technical Field
The invention relates to the field of thermal sublimation transfer printing functional materials, in particular to a thermal sublimation transfer printing coating with uniform temperature rise and a preparation process of functional micromolecules.
Background
The core step of the thermal sublimation transfer printing process is to thermally press the transfer printing paper to a certain temperature to sublimate ink in the transfer printing paper so as to achieve the purpose of image transfer. The heating speed has great influence on the efficiency of thermal sublimation transfer printing. The existing transfer paper in the market is slow in temperature rise and insufficient in uniformity, high-speed production is not facilitated, and the phenomenon of uneven pattern color caused by uneven temperature is easy to occur. Thermal sublimation rendition stamp is printed on transfer printing paper with the mirror surface mode through using thermal sublimation ink with the image, and under the certain temperature condition, the dyestuff molecule is heated and is sublimated to accomplish the transfer of image. In order to ensure the uniformity of the color of the transferred pattern, the uniformity of the heating of the dye molecules needs to be improved. Currently, transfer paper products that are specifically addressed in this regard are lacking in the market.
Disclosure of Invention
The invention mainly solves the technical problem of providing a thermal sublimation transfer printing coating with uniform temperature rise and a preparation process of functional micromolecules, which are obtained by processing tetrahydrofuran solution, glycerol, triphenylchloromethane, 4-dimethylaminopyridine, triethylamine and other raw materials. Have a plurality of active sites among this small molecule material, can be simultaneously with dyestuff particle and high heat conduction material effect, heat conduction is more even between the coating material, can release dyestuff molecule by more efficient at the rendition in-process, effectively improves the transfer rate, and the thermal sublimation performance of coating effectively promotes.
In order to solve the technical problems, the invention adopts a technical scheme that: the heat sublimation transfer printing coating with uniform temperature rise and the preparation process of the functional micromolecules thereof are provided, and the coating composition comprises the following components in parts by mass: 30-38 parts of 1, 2-dihydroxy-3-trityl-propane, 10-15 parts of nano silicon nitride, 8-13 parts of nano aluminum oxide, 28-35 parts of a film forming agent and 5-10 parts of a filler.
The film forming agent comprises one or more of polyvinyl acetate emulsion, pure acrylic emulsion, styrene-acrylic emulsion, polyoxyethylene and polytetrafluoroethylene.
The filler comprises one or more of calcium oxide, cross-linked starch, ceramic powder, bamboo stone powder and lithopone.
The preparation method of the thermal sublimation micromolecule functional material 1, 2-dihydroxy-3-trityl-propane comprises the following steps:
s1, adding glycerin (2 g, 1.00 equiv.), triphenylchloromethane (1.51 g, 0.25 equiv.), 4-dimethylaminopyridine (14.9 mg, 0.0056 equiv.) and triethylamine (0.66 g, 0.3 equiv.) to 20 mL of tetrahydrofuran solution, and stirring the mixed solution at 25 ℃ for 12 hours;
s2, after the reaction is finished, adding 20 mL of water and 20 mL of ethyl acetate into the reaction system, and separating the mixture;
s3, separating the mixed solution with a separatory funnel to obtain an organic layer;
s4, the organic layer was sequentially treated with NaHCO3Washing with 20 mL of saturated aqueous solution, 20 mL of water and 20 mL of saturated saline, drying with anhydrous sodium sulfate after washing, and filtering to obtain filtrate;
s5, concentrating the filtrate by using a rotary evaporator to obtain a yellow oily crude product;
s6, 20 mL of toluene-n-hexane mixed solution (1: 1) was added, and after stirring at room temperature for 1 hour, the mixture was allowed to stand for 24 hours to recrystallize, thereby obtaining the target product 1, 2-dihydroxy-3-trityl-propane (5.8 g, yield: 80%).
The invention has the beneficial effects that: the invention provides a thermal sublimation transfer printing coating with uniform temperature rise and a preparation process of functional micromolecules, which are obtained by processing tetrahydrofuran solution, glycerol, triphenylchloromethane, 4-dimethylaminopyridine, triethylamine and other raw materials. Have a plurality of active sites among this small molecule material, can be simultaneously with dyestuff particle and high heat conduction material effect, heat conduction is more even between the coating material, is heated at the rendition in-process and can more efficient release dyestuff molecule, effectively improves the transfer rate, and the thermal sublimation performance of coating effectively promotes.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a representation spectrum of a high thermal conductivity thermal sublimation small molecule functional material of the invention;
fig. 2-4 are graphs comparing material properties of a preferred embodiment of a thermal sublimation transfer coating and a functional small molecule preparation process with uniform temperature rise according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-4, embodiments of the present invention include:
in the first embodiment, the preparation of the small molecule thermal sublimation functional material 1, 2-dihydroxy-3-trityl-propane according to the invention:
a thermal sublimation micromolecule functional material with high thermal conductivity has a structural formula of 1, 2-dihydroxy-3-trityl-propane:
further, the preparation method of the micromolecule thermal sublimation functional material 1, 2-dihydroxy-3-trityl-propane comprises the following steps:
s1, adding glycerin (2 g, 1.00 equiv.), triphenylchloromethane (1.51 g, 0.25 equiv.), 4-dimethylaminopyridine (14.9 mg, 0.0056 equiv.) and triethylamine (0.66 g, 0.3 equiv.) to 20 mL of tetrahydrofuran solution, and stirring the mixed solution at 25 ℃ for 12 hours;
s2, after the reaction is finished, adding 20 mL of water and 20 mL of ethyl acetate into the reaction system, and separating the mixture;
s3, separating the mixed solution with a separatory funnel to obtain an organic layer;
s4, the organic layer was sequentially treated with NaHCO3Washing with 20 mL of saturated aqueous solution, 20 mL of water and 20 mL of saturated saline, drying with anhydrous sodium sulfate after washing, and filtering to obtain filtrate;
s5, concentrating the filtrate by using a rotary evaporator to obtain a yellow oily crude product;
s6, 20 mL of toluene-n-hexane mixed solution (1: 1) was added, and after stirring at room temperature for 1 hour, the mixture was allowed to stand for 24 hours to recrystallize, thereby obtaining the target product 1, 2-dihydroxy-3-trityl-propane (5.8 g, yield: 80%).
The nuclear magnetic characterization data of the compound are as follows:
1H NMR (400 MHz, Chloroform-d):δ7.48-7.21 (m, 15H), 3.86 (d, J = 6.2 Hz, 1H), 3.67 (q, J = 5.5, 4.5 Hz, 1H), 3.62-3.55 (m, 1H), 3.32-3.19 (m, 2H), 2.56 (d, J = 4.6 Hz, 1H), 2.05 (d, J = 7.9 Hz, 1H).
the related characterization spectrum is shown in figure 1.
The novel micromolecular material 1, 2-dihydroxy-3-trityl-propane obtained by the embodiment is a thermal sublimation functional material, a plurality of active sites are arranged in the micromolecular material, the micromolecular material can simultaneously act with dye particles and high-heat-conduction materials, the heat conduction between coating materials is more uniform, dye molecules can be more efficiently released in the transfer process, the transfer rate is effectively improved, and the thermal sublimation performance of the coating is effectively improved.
Compared with the traditional high polymer material, the 1, 2-dihydroxy-3-trityl-propane micromolecule material has smaller molecular volume and can be more uniformly distributed among gaps of high-thermal-conductivity materials. High heat conduction material uses with the cooperation of novel micro molecule material, can make thermal sublimation transfer printing paper surface evenly heat up, and the coating can high-efficient release dyestuff molecule simultaneously to when guaranteeing high transfer rate, promote the rendition quality by a wide margin.
Example two, component examples of coating material formulations of the present invention:
by using the functional small molecule material obtained in the first embodiment, the thermal sublimation transfer printing coating with uniform temperature rise can be prepared, and the coating material comprises the following components: 36 parts of 1, 2-dihydroxy-3-trityl-propane, 11 parts of nano silicon nitride, 12 parts of nano aluminum oxide, 32 parts of a film forming agent and 9 parts of a filler.
Wherein the film forming agent comprises one or more of polyvinyl acetate emulsion, pure acrylic emulsion, styrene-acrylic emulsion, polyoxyethylene and polytetrafluoroethylene; the filler comprises one or more of calcium oxide, cross-linked starch, ceramic powder, bamboo stone powder and lithopone.
Example three:
the functional coating of the second embodiment can be used for producing the thermal sublimation transfer printing paper with uniform temperature raising performance, and the processing method comprises the following steps:
step one, selecting proper base paper.
Step two, weighing according to the weight ratio: 33 parts of 1, 2-dihydroxy-3-trityl-propane, 12 parts of nano silicon nitride, 10 parts of nano aluminum oxide, 25 parts of a film forming agent and 7 parts of a filler. Stirring at room temperature for 60 min.
And step three, coating 2-6g of the material in the step 1 on the front surface coating of the base paper.
And step four, drying by 3-5 drying ovens, setting the temperature of the drying ovens to be 70-85 ℃, setting the speed to be 120-140m/min, completely drying by a drying cylinder, and rolling to obtain the thermal sublimation transfer paper.
Wherein, the nano-alumina and the nano-silicon nitride are two materials with high thermal conductivity coefficient. According to the thermal sublimation coating material, the nano aluminum oxide and nano silicon nitride high-thermal conductivity materials with larger specific gravity are introduced, the high-thermal conductivity materials can be uniformly distributed in the transfer printing coating, and in the hot pressing process, a good thermal conduction effect is achieved among material molecules of the coating, so that the temperature rise of the paper surface of the transfer printing paper is more uniform, dye molecules fixed in the thermal sublimation coating are uniformly heated, the dye molecules in the coating are uniformly sublimated, the phenomenon that the color of a transfer printing pattern is uneven is weakened, and the product quality of a printing and dyeing product is greatly improved.
Based on the technical scheme of embodiment 3, two performance tests have been carried out to the product performance of thermal sublimation transfer printing paper, include:
1. testing of Heat conduction Effect
Replacing alumina and silicon oxide in the formula with kaolin and bentonite in the same proportion, and coating 7g/m of the same base paper2The obtained transfer paper was produced as a reference 1. Printing mixed black at room temperature of 25 deg.C with 400% of ink jet amount, hot pressing at 220 deg.C for 5s, 10s, 15s, 20s, 25s, and 30s, respectively, measuring the color difference between the front and back of the transfer position, and calculating the formula etac1=（C0-C1）/C0And (3) calculating the transfer rate, calculating the transfer rates of the four vertexes and the diagonal boundary position of the color block respectively, calculating an average value, obtaining the relation between the hot pressing time and the transfer rate, and comparing the test results as shown in fig. 2.
The experimental result shows that the novel transfer paper added with the alumina and silicon oxide high-thermal-conductivity material is improved to a certain extent compared with the transfer paper without the high-thermal-conductivity material coating under the condition of hot pressing for the same time. The transfer rate of the novel transfer paper reaches a stable value basically when the novel transfer paper is hot-pressed for 20 seconds, and the transfer rate of the transfer paper without the high-thermal-conductivity material coating still slightly increases after 20 seconds.
2. Transfer rate test
Using 400% ink jet on the novel transfer paper of the invention at room temperatureAnd printing two CMYK four-monochromatic color blocks, and after completely drying, respectively hot-pressing at 220 ℃ for 20 seconds and 30 seconds. Measuring the front and rear color difference of the transfer position and according to the formula etac1=（C0-C1）/C0And calculating the transfer rate, respectively calculating the transfer rates of the four vertexes and the diagonal boundary position of the color block, and calculating an average value. The experimental data are shown in figure 3.
The transfer rate of the reference four single colors was measured by the same test method under hot pressing at 220 ℃ for 20 seconds and 30 seconds by selecting a commercially available transfer paper as the reference. The results of the experiment are shown in FIG. 4.
The experimental result shows that the transfer rate has comparatively obvious difference under the condition of market thermal sublimation transfer paper hot pressing 20 seconds and hot pressing 30 seconds, and the transfer rate of this novel transfer paper hot pressing 20 seconds of this project is basically the same with the transfer rate of market thermal sublimation transfer paper hot pressing 30 seconds, and the transfer rate of this novel transfer paper hot pressing 20 seconds of this project is basically stable with the transfer rate of hot pressing 30 seconds, shows that this novel transfer paper of project is under 220 ℃'s condition, and the rendition has basically been accomplished to hot pressing 20 seconds. The novel thermal sublimation transfer paper is added with a certain amount of high thermal conductive material, the thermal conductive material is dispersed in the coating and is beneficial to uniform and rapid heating of the coating, meanwhile, the novel thermal sublimation transfer paper introduces micromolecule 1, 2-dihydroxy-3-trityl-propane as a thermal sublimation functional material, the material has efficient release performance on dye particles, the molecular volume is small, and the material can be uniformly distributed among gaps of the high thermal conductive material. Under the combined action of the two, the novel transfer paper can finish high-efficiency transfer printing, and is beneficial to high-efficiency printing production.
Therefore, the coating prepared by the technical scheme has the characteristics of uniform heat conduction and high color uniformity of the transfer printing pattern. The thermal sublimation who uses novel thermal sublimation coating material production changes printing paper faster, more even at rendition in-process programming rate, and the transfer rate is high, and the pattern colour of rendition is even bright-coloured more.
In conclusion, the invention provides a thermal sublimation transfer printing coating with uniform temperature rise and a preparation process of functional micromolecules, which are obtained by processing tetrahydrofuran solution, glycerol, triphenylchloromethane, 4-dimethylaminopyridine, triethylamine and other raw materials. The micromolecule material has a plurality of active sites, can simultaneously act with dye particles and high-heat-conduction materials, can more efficiently release dye molecules in the transfer process, effectively improves the transfer rate, and effectively improves the thermal sublimation performance of the coating.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. A thermal sublimation transfer printing coating capable of uniformly heating and a functional micromolecule preparation process thereof are characterized in that the coating composition comprises the following components in parts by mass: 30-38 parts of 1, 2-dihydroxy-3-trityl-propane, 10-15 parts of nano silicon nitride, 8-13 parts of nano aluminum oxide, 28-35 parts of a film forming agent and 5-10 parts of a filler.
2. The process for preparing a thermal sublimation transfer printing coating and functional micromolecules with uniform temperature rise according to claim 1, wherein the film forming agent comprises one or more of polyvinyl acetate emulsion, pure acrylic emulsion, styrene-acrylic emulsion, polyoxyethylene and polytetrafluoroethylene.
3. The process for preparing a thermal sublimation transfer printing coating and functional micromolecules with uniform temperature rise according to claim 1, wherein the filler comprises one or more of calcium oxide, cross-linked starch, ceramic powder, bamboo powder and lithopone.
4. The process for preparing uniformly-heated thermal sublimation transfer printing coating and functional micromolecule according to claim 1, wherein the method for preparing the micromolecule thermal sublimation functional material 1, 2-dihydroxy-3-trityl-propane comprises the following steps:
s1, adding glycerin (2 g, 1.00 equiv.), triphenylchloromethane (1.51 g, 0.25 equiv.), 4-dimethylaminopyridine (14.9 mg, 0.0056 equiv.) and triethylamine (0.66 g, 0.3 equiv.) to 20 mL of tetrahydrofuran solution, and stirring the mixed solution at 25 ℃ for 12 hours;
s2, after the reaction is finished, adding 20 mL of water and 20 mL of ethyl acetate into the reaction system, and separating the mixture;
s3, separating the mixed solution with a separatory funnel to obtain an organic layer;
s4, the organic layer was sequentially treated with NaHCO3Washing with 20 mL of saturated aqueous solution, 20 mL of water and 20 mL of saturated saline, drying with anhydrous sodium sulfate after washing, and filtering to obtain filtrate;
s5, concentrating the filtrate by using a rotary evaporator to obtain a yellow oily crude product;
s6, 20 mL of toluene-n-hexane mixed solution (1: 1) was added, and after stirring at room temperature for 1 hour, the mixture was allowed to stand for 24 hours to recrystallize, thereby obtaining the target product 1, 2-dihydroxy-3-trityl-propane (5.8 g, yield: 80%).
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