CN115534554A - Anti-fog and anti-redness color developing agent for thermosensitive printing medical film and preparation method thereof - Google Patents
Anti-fog and anti-redness color developing agent for thermosensitive printing medical film and preparation method thereof Download PDFInfo
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- CN115534554A CN115534554A CN202210539338.9A CN202210539338A CN115534554A CN 115534554 A CN115534554 A CN 115534554A CN 202210539338 A CN202210539338 A CN 202210539338A CN 115534554 A CN115534554 A CN 115534554A
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- cyclodextrin
- beta
- developing agent
- color
- fog
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- 238000007639 printing Methods 0.000 title claims abstract description 11
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 229920000858 Cyclodextrin Polymers 0.000 claims abstract description 40
- 239000001116 FEMA 4028 Substances 0.000 claims abstract description 38
- WHGYBXFWUBPSRW-FOUAGVGXSA-N beta-cyclodextrin Chemical compound OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO WHGYBXFWUBPSRW-FOUAGVGXSA-N 0.000 claims abstract description 38
- 235000011175 beta-cyclodextrine Nutrition 0.000 claims abstract description 38
- 229960004853 betadex Drugs 0.000 claims abstract description 38
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- 150000001875 compounds Chemical class 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 21
- 239000000243 solution Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000001338 self-assembly Methods 0.000 claims description 11
- 238000007651 thermal printing Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 238000001704 evaporation Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- GBMDVOWEEQVZKZ-UHFFFAOYSA-N methanol;hydrate Chemical compound O.OC GBMDVOWEEQVZKZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000012298 atmosphere Substances 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000003094 microcapsule Substances 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002209 hydrophobic effect Effects 0.000 abstract description 2
- 230000005012 migration Effects 0.000 abstract description 2
- 238000013508 migration Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 241000276498 Pollachius virens Species 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000002431 foraging effect Effects 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- XAAILNNJDMIMON-UHFFFAOYSA-N 2'-anilino-6'-(dibutylamino)-3'-methylspiro[2-benzofuran-3,9'-xanthene]-1-one Chemical compound C=1C(N(CCCC)CCCC)=CC=C(C2(C3=CC=CC=C3C(=O)O2)C2=C3)C=1OC2=CC(C)=C3NC1=CC=CC=C1 XAAILNNJDMIMON-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- FWQHNLCNFPYBCA-UHFFFAOYSA-N fluoran Chemical compound C12=CC=CC=C2OC2=CC=CC=C2C11OC(=O)C2=CC=CC=C21 FWQHNLCNFPYBCA-UHFFFAOYSA-N 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005494 tarnishing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/333—Colour developing components therefor, e.g. acidic compounds
- B41M5/3333—Non-macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Medicinal Preparation (AREA)
Abstract
The invention discloses an anti-fog and anti-redness color developing agent for a thermal-sensitive printing medical film and a preparation method thereof. The color-developing agent takes beta-cyclodextrin and color-developing agent D-8 as raw materials, and the D-8 is self-assembled in a cavity of the beta-cyclodextrin to form a D-8 inclusion compound of the beta-cyclodextrin. According to the invention, D-8 is self-assembled in the cavity of beta-cyclodextrin by utilizing the hydrophobic property of the cavity of beta-cyclodextrin, so that the defects of migration and oxidation of D-8 at room temperature are avoided, and the anti-fog and anti-reddening properties of the thermosensitive medical film are improved. The protection method has the advantages of simple production conditions, simple reaction treatment process, high yield, low cost and high implementation feasibility; the medical film prepared by the invention realizes the problem of fog and color change of the thermosensitive printing medical film through the protection effect of the cavity of the beta-cyclodextrin on the color developing agent D-8. When the developer is used for thermal development, only D-8 can get rid of the cavity constraint of beta-cyclodextrin through thermal movement and then enter the thermosensitive dye microcapsule through the permeation action, and the color development reaction is carried out to form an image.
Description
Technical Field
The invention belongs to the technical field of medical films, and particularly relates to an anti-fog and anti-redness color developing agent for a thermal-sensitive printing medical film and a preparation method thereof.
Background
Information recording and reproduction materials are an essential tool in human study, life and work. With the rapid development of information technology, information in the form of pictures, characters and the like needs to be recorded, stored or reproduced, and people put higher requirements on information recording and reproducing materials.
The thermosensitive information recording and reproducing technology becomes a research hotspot in the information industry. The thermosensitive information recording and reproducing technology is that thermosensitive dye microcapsule material is dispersed in protecting glue to prepare thermosensitive medical film in coating mode. At present, the thermosensitive dye for the medical film is mainly ODB-2 fluoran recessive dye, and the adopted color developing agent is mainly D-8 color developing agent. The method of directly dispersing the color-developing agent into the recording layer of the thermosensitive dye microcapsule to record information has the advantages of easy control of dispersing effect, convenient preparation, high image density, etc., but the gray haze value of the recording material is increased due to diffusion during storage and transportation, and the film turns red due to oxidation of the color-developing agent, thereby affecting the image quality. The micro-encapsulation mode of the color developing agent can effectively reduce the generation of fog during the storage and transportation of the material, keep the stability of the image and keep higher image density. However, the traditional microencapsulation process is complex and high in cost. With the increasing market competition pressure, the invention of a low-cost solution becomes the key of the price competition of the industry.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a solution for a thermal printing medical film capable of resisting fog and redness.
In order to achieve the purpose, the invention adopts the following technical scheme: a color developing agent for a thermosensitive printing medical film capable of resisting fog and redness, which is characterized in that: the color-developing agent takes beta-cyclodextrin and color-developing agent D-8 as raw materials, and the D-8 is self-assembled in a cavity of the beta-cyclodextrin to form a D-8 inclusion compound of the beta-cyclodextrin.
Further, the mol feed ratio of the beta-cyclodextrin to the D-8 is 1:1 to 3.
A process for preparing the thermosensitive print medical film able to resist fog and red includes such steps as self-assembling reaction between beta-cyclodextrin and developer D-8 in inertial atmosphere and deionized water as solvent, evaporating, washing with aqueous solution of methanol, and baking.
Further, the inert gas is nitrogen, helium or argon.
Furthermore, the self-assembly reaction temperature is 50-80 ℃.
Furthermore, the self-assembly reaction time is 5-8 h.
Further, the mass concentration of the methanol aqueous solution was 20%.
Further, the mass ratio of the raw materials to the solvent is as follows:
the invention has the advantages and beneficial effects that: according to the invention, D-8 is self-assembled in the cavity of beta-cyclodextrin by utilizing the hydrophobic property of the cavity of beta-cyclodextrin, so that the defects of migration and oxidation of D-8 at room temperature are avoided, and the anti-fog and anti-reddening properties of the thermosensitive medical film are improved. The protection method has the advantages of simple production conditions, simple reaction treatment process, high yield, low cost and high implementation feasibility; the medical film prepared by the invention realizes the fog-free and anti-tarnishing resistance of the thermal printing medical film through the protection function of the cavity of the beta-cyclodextrin on the color developing agent D-8. When the developer is used for thermal development, only D-8 can get rid of the cavity constraint of beta-cyclodextrin through thermal movement and enter the thermosensitive dye microcapsule through osmosis to generate a color development reaction to form an image.
Detailed Description
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
A solution of a thermal printing medical film capable of resisting fog and blushing adopts the following steps: dissolving beta-cyclodextrin (11.35g, 0.01mol) and a color-developing agent D-8 (2.92g, 0.01mol) in 200mL of deionized water in a nitrogen atmosphere, carrying out self-assembly reaction for 5 hours at the reaction temperature of 50 ℃ under the protection of nitrogen, evaporating to dry after the reaction is finished, washing with 20% methanol water solution, and drying to obtain the D-8 inclusion compound of the beta-cyclodextrin. The inclusion yield was 88% (based on D-8).
A self-made D-8 inclusion compound of 18g of beta-cyclodextrin was dissolved in 150mL of a heat-sensitive dye microcapsule emulsion manufactured by Kohler technologies, inc. of Nanyang. And uniformly coating the mixed solution on a PET (polyethylene terephthalate) substrate by using a wire rod, drying in the air for 3 hours, and directly printing by using a thermal printer. After printing, the plate was placed in an oven at 60 ℃ for aging for 5 hours, and then the haze value and the image density were measured using an Achromic densitometer. The oxidative protection of D-8 by beta-cyclodextrin was judged by visual assessment of film placement through whether the film was reddened.
Example 2
A solution of a thermal printing medical film capable of resisting fog and blushing adopts the following steps: dissolving beta-cyclodextrin (11.35 g,0.01 mol) and a color-developing agent D-8 (8.76g, 0.03mol) in 200mL of deionized water, carrying out self-assembly reaction at the reaction temperature of 50 ℃ under the protection of helium, evaporating to dry after the reaction is finished, washing with 20% methanol aqueous solution, and drying to obtain the D-8 inclusion compound of the beta-cyclodextrin. The inclusion yield was 87% (based on D-8).
Example 3
A solution of a thermal printing medical film capable of resisting fog and blushing adopts the following steps: dissolving beta-cyclodextrin (11.35g, 0.01mol) and a color-developing agent D-8 (8.76g, 0.03mol) in 200mL of deionized water, carrying out self-assembly reaction for 5 hours at the reaction temperature of 80 ℃ under the protection of argon, evaporating to dry after the reaction is finished, washing with 20% methanol aqueous solution, and drying to obtain the D-8 inclusion compound of the beta-cyclodextrin. The inclusion yield was 95% (based on D-8).
Example 4
A solution of a thermal printing medical film capable of resisting fog and red-blushing comprises the following steps: dissolving beta-cyclodextrin (11.35 g,0.01 mol) and a color-developing agent D-8 (2.92g, 0.01mol) in 200ml of deionized water, carrying out self-assembly reaction for 5 hours at the reaction temperature of 50 ℃ under the protection of nitrogen, evaporating to dry after the reaction is finished, washing with 20% methanol aqueous solution, and drying to obtain the D-8 inclusion compound of the beta-cyclodextrin. The inclusion yield was 92% (based on D-8).
Example 5
A solution of a thermal printing medical film capable of resisting fog and red-blushing comprises the following steps: dissolving beta-cyclodextrin (11.35 g,0.01 mol) and a color-developing agent D-8 (2.92g, 0.01mol) in 200mL deionized water, carrying out self-assembly reaction for 8 hours at the reaction temperature of 80 ℃ under the protection of nitrogen, evaporating to dry after the reaction is finished, washing with 20% methanol aqueous solution, and drying to obtain the D-8 inclusion compound of the beta-cyclodextrin. The inclusion yield was 89% (based on D-8).
Example 6
A solution of a thermal printing medical film capable of resisting fog and red-blushing comprises the following steps: dissolving beta-cyclodextrin (11.35g, 0.01mol) and a color-developing agent D-8 (2.92g, 0.01mol) in 200mL of deionized water in a nitrogen atmosphere, carrying out self-assembly reaction for 7 hours at the reaction temperature of 60 ℃ under the protection of nitrogen, evaporating to dry after the reaction is finished, washing with 20% methanol water solution, and drying to obtain the D-8 inclusion compound of the beta-cyclodextrin. The inclusion yield was 91% (based on D-8).
The D-8 inclusion compound of beta-cyclodextrin prepared in examples 1-6 above was prepared by grinding 18g of the inclusion compound, prepared by the homemade method, to a size of 1 micron or less, and dispersing in 150mL of a heat-sensitive dye microcapsule emulsion manufactured by Koehler technologies, inc., south Yang. And uniformly coating the mixed solution on a PET (polyethylene terephthalate) substrate by using a wire rod, drying in the air for 3 hours, and directly printing by using a thermal printer. After printing, the plate was placed in an oven at 60 ℃ for aging for 5 hours, and then the haze value and the image density were measured using an alexandric densitometer. The oxidative protection of D-8 by beta-cyclodextrin was judged by visual assessment of film placement through whether the film was reddened. The results are shown in Table 1:
TABLE 1
As can be seen from Table 1, the imaging density of the medical film prepared by the cyclodextrin inclusion color developing agent is not much different from that of the medical film prepared without the cyclodextrin inclusion color developing agent, but the gray fog value and the red-flushing resistance are greatly reduced, which indicates that the method has good performance characteristics of gray fog resistance and red-flushing resistance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A color developing agent for a thermosensitive printing medical film capable of resisting fog and redness, which is characterized in that: the color-developing agent takes beta-cyclodextrin and color-developing agent D-8 as raw materials, and the D-8 is self-assembled in a cavity of the beta-cyclodextrin to form a D-8 inclusion compound of the beta-cyclodextrin.
2. The anti-fogging and anti-redness developer for thermal printing medical film according to claim 1, wherein: the mol feed ratio of the beta-cyclodextrin to the D-8 is 1:1 to 3.
3. A method for preparing the anti-fog and anti-reddening developer for thermal printing medical films according to any one of claims 1 or 2, comprising: under the inert atmosphere, taking beta-cyclodextrin and a color-developing agent D-8 as raw materials, taking deionized water as a solvent to carry out self-assembly reaction, evaporating to dry after the reaction is finished, washing with a methanol water solution, and drying to obtain the D-8 inclusion compound of the beta-cyclodextrin.
4. The production method according to claim 3, characterized in that: the inert gas is nitrogen, helium or argon.
5. The production method according to claim 3, characterized in that: the self-assembly reaction temperature is 50-80 ℃.
6. The production method according to claim 3, characterized in that: the self-assembly reaction time is 5-8 h.
7. The production method according to claim 3, characterized in that: the mass concentration of the methanol aqueous solution is 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210539338.9A CN115534554A (en) | 2022-05-17 | 2022-05-17 | Anti-fog and anti-redness color developing agent for thermosensitive printing medical film and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210539338.9A CN115534554A (en) | 2022-05-17 | 2022-05-17 | Anti-fog and anti-redness color developing agent for thermosensitive printing medical film and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115534554A true CN115534554A (en) | 2022-12-30 |
Family
ID=84723965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210539338.9A Pending CN115534554A (en) | 2022-05-17 | 2022-05-17 | Anti-fog and anti-redness color developing agent for thermosensitive printing medical film and preparation method thereof |
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| Country | Link |
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| CN (1) | CN115534554A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116655829A (en) * | 2023-05-10 | 2023-08-29 | 乐凯华光印刷科技有限公司 | Modified cyclodextrin, and treatment-free thermosensitive plate precursor, treatment-free thermosensitive plate and application containing modified cyclodextrin |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09156231A (en) * | 1995-12-12 | 1997-06-17 | Mitsubishi Paper Mills Ltd | Coupler and thermal recording material using the same |
| CN106079957A (en) * | 2016-06-20 | 2016-11-09 | 河南卓立膜材料股份有限公司 | Medical image film formed by thermosensitive chromogenic material and manufacturing method thereof |
| CN108864776A (en) * | 2018-05-22 | 2018-11-23 | 成都新柯力化工科技有限公司 | A kind of the building decoration diatom ooze dry powder paint and preparation method of changeable colour |
| CN114058204A (en) * | 2022-01-14 | 2022-02-18 | 虎丘影像(苏州)股份有限公司 | Fluorine-containing thermosensitive dye microcapsule, preparation method thereof and film |
-
2022
- 2022-05-17 CN CN202210539338.9A patent/CN115534554A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09156231A (en) * | 1995-12-12 | 1997-06-17 | Mitsubishi Paper Mills Ltd | Coupler and thermal recording material using the same |
| CN106079957A (en) * | 2016-06-20 | 2016-11-09 | 河南卓立膜材料股份有限公司 | Medical image film formed by thermosensitive chromogenic material and manufacturing method thereof |
| CN108864776A (en) * | 2018-05-22 | 2018-11-23 | 成都新柯力化工科技有限公司 | A kind of the building decoration diatom ooze dry powder paint and preparation method of changeable colour |
| CN114058204A (en) * | 2022-01-14 | 2022-02-18 | 虎丘影像(苏州)股份有限公司 | Fluorine-containing thermosensitive dye microcapsule, preparation method thereof and film |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116655829A (en) * | 2023-05-10 | 2023-08-29 | 乐凯华光印刷科技有限公司 | Modified cyclodextrin, and treatment-free thermosensitive plate precursor, treatment-free thermosensitive plate and application containing modified cyclodextrin |
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