CN115503368A - High-temperature and high-humidity resistant thermal transfer ribbon and preparation method thereof - Google Patents
High-temperature and high-humidity resistant thermal transfer ribbon and preparation method thereof Download PDFInfo
- Publication number
- CN115503368A CN115503368A CN202211250684.1A CN202211250684A CN115503368A CN 115503368 A CN115503368 A CN 115503368A CN 202211250684 A CN202211250684 A CN 202211250684A CN 115503368 A CN115503368 A CN 115503368A
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- CN
- China
- Prior art keywords
- parts
- resin
- coating
- thermal transfer
- transfer ribbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/30—Thermal donors, e.g. thermal ribbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/36—Backcoats; Back layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/38—Intermediate layers; Layers between substrate and imaging layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/40—Cover layers; Layers separated from substrate by imaging layer; Protective layers; Layers applied before imaging
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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Abstract
The invention relates to a high-temperature and high-humidity resistant thermal transfer ribbon and a preparation method thereof, belonging to the technical field of soft label printing. The high-temperature and high-humidity resistant thermal transfer ribbon comprises a back coating, a substrate, a release layer and an ink layer which are sequentially attached from top to bottom; the back coating is prepared by mixing and coating the following raw materials in parts by weight: 50-200 parts of solvent, 10-50 parts of heat-resistant resin, 2-10 parts of filler particles, 0.1-1 part of lubricant, 0.5-5 parts of dispersant, 0.5-5 parts of antistatic agent and 1-12 parts of adhesive. The invention also discloses a preparation method of the high-temperature and high-humidity resistant thermal transfer ribbon. Has the advantages that: in order to reduce the abnormal adhesion of the back coating and the ink layer, filler particles are introduced into the back coating, and the filler is uniformly distributed in the back coating to form a similar 'bracket' structure on the surface of the back coating, so that the structure can effectively reduce the contact between the coating and improve the weather resistance of the carbon ribbon.
Description
Technical Field
The invention belongs to the technical field of soft mark printing, and particularly relates to a high-temperature and high-humidity resistant thermal transfer ribbon and a preparation method thereof.
Background
Among the thermal transfer techniques are thermal transfer printers and transfer ribbons. Generally, the ink layer is transferred to a printing material by heating a transfer ribbon by a temperature-sensitive print head of a printer. In the transfer process, in order to achieve high-quality, rapid transfer, the adaptability of the thermal transfer ribbon to the temperature-sensitive print head is considered to be an important factor. For this reason, in order to improve the adaptability of the carbon ribbon to the print head, a plurality of layers of coatings are usually disposed on the surface of the carbon ribbon. For example, a transfer ink layer and a release layer are provided on the front surface of a base material, and a back coat layer is provided on the back surface of the base material. Wherein, the thermal transfer printing ink layer and the release layer realize high-quality printing effect, and the back coating layer provides proper smoothness and stability. However, the conventional thermal sublimation printing thermal transfer ribbon is subjected to adhesion or peeling between the front and back surfaces of the coating under abnormal transportation and storage conditions, resulting in a decrease in transfer quality. Meanwhile, such abnormal adhesion and peeling may cause damage to the print head during high-speed printing.
Therefore, a high-temperature and high-humidity resistant thermal transfer ribbon and a preparation method thereof are provided to solve the defects in the prior art.
Disclosure of Invention
The invention provides a high-temperature and high-humidity resistant thermal transfer ribbon for solving the technical problems, and in order to reduce the abnormal adhesion between a back coating and an ink layer, filler particles are introduced into the back coating, and the filler is uniformly distributed in the back coating to form a similar 'support' structure on the surface of the back coating, so that the structure can effectively reduce the contact between the coating and improve the weather resistance of the ribbon.
The technical scheme for solving the technical problems is as follows: the high-temperature and high-humidity resistant thermal transfer printing carbon ribbon comprises a back coating, a substrate, a release layer and an ink layer which are sequentially attached from top to bottom; the back coating is prepared by mixing and coating the following raw materials in parts by weight: 50-200 parts of solvent, 30 parts of heat-resistant resin, 2-10 parts of filler particles, 0.1-1 part of lubricant, 0.5-5 parts of dispersant, 0.5-5 parts of antistatic agent and 1-12 parts of adhesive; the release layer is formed by mixing and coating the following raw materials in parts by weight: 50-200 parts of solvent, 5-35 parts of polyester resin and 0.5-5 parts of polyethylene glycol; the ink layer is formed by mixing and then coating the following raw materials in parts by weight: 50-200 parts of solvent, 3-18 parts of polyester resin, 0.1-5 parts of vinyl chloride-vinyl acetate copolymer, 0.2-6 parts of chlorinated polypropylene, 6 parts of inorganic pigment and 2.5-15 parts of solid particles. The invention also discloses a preparation method of the high-temperature and high-humidity resistant thermal transfer ribbon.
Has the advantages that: in order to reduce the abnormal adhesion of the back coating and the ink layer, filler particles are introduced into the back coating, and the filler is uniformly distributed in the back coating to form a similar 'bracket' structure on the surface of the back coating, so that the structure can effectively reduce the contact between the coating and improve the weather resistance of the carbon ribbon.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the substrate is any one of a polyethylene terephthalate film, a 1, 4-polycyclohexylidene dimethylene terephthalate film, polyethylene naphthalate, polyphenylene sulfide film, polystyrene film, polypropylene film, polyethylene film, polyvinyl chloride film, nylon film and polyimide film.
Has the advantages that: the film is adopted as the substrate, so that the back coating layer and the release layer can be better ensured to be effectively coated on the surface of the substrate.
Further, the filler particles are silicone resins.
Has the beneficial effects that: the lubricating effect is improved, the adverse effect of high-temperature and high-humidity environment on the carbon ribbon in the storage and transportation process is improved, and the normal printing quality is ensured.
Further, the solvent is one or a mixture of two of 2-butanone and toluene.
Has the beneficial effects that: the 2-butanone and/or toluene is used as a solvent to ensure that the components in the back coating layer, the release layer and the ink layer are fully dispersed and mixed.
Further, the thickness of the substrate is 0.5-50 μm, the thickness of the back coating layer is 0.5-1.2 μm, the thickness of the release layer is 0.2-0.6 μm, and the thickness of the ink layer is 0.3-0.8 μm.
Has the advantages that: the thickness of the thermal transfer ribbon can be ensured within the thickness range, and the adhesive force and the wear resistance to the base material are good.
Further, the lubricant is any one of silicone oil, polyethylene wax, paraffin, higher fatty acid ester, higher fatty acid amide, higher fatty alcohol and metal soap; the dispersing agent is any one of an anionic surfactant, a cationic surfactant, a nonionic surfactant and an organic carboxylic acid; the antistatic agent is any one of long-chain alkyl quaternary ammonium salt, alkyl sulfonate, alkyl phosphoric acid, dithiocarbamate and ethoxylated aliphatic alkylamine; the adhesive is any one of cellulose acetate, polyvinyl acetal, acrylic resin and isocyanate resin.
Has the beneficial effects that: the lubricant reduces the friction resistance between the printing head and the base material and improves the lubricating effect; the dispersant improves the dispersibility of the coating components; the antistatic agent increases the antistatic performance of the base material; the adhesive improves the bonding property of the heat-resistant resin and the base material, and ensures the heat resistance and the stability of the coating.
Further, the inorganic pigment is carbon black; the solid particles are any one of silicon dioxide, zinc stearate and thermosetting acrylic acid particles.
Has the advantages that: the carbon black has good coloring effect, the solid particles can improve lubricating effect, the adverse effect of high-temperature and high-humidity environment on the carbon ribbon in the storage and transportation process is improved, and the normal printing quality is ensured.
Further, the heat-resistant resin is any one of a polyvinyl butyral resin, a polyvinyl acetal resin, a polyester resin, a vinyl chloride-vinyl acetate copolymer polyether resin, a polybutadiene resin, a styrene-pentadiene copolymer acrylic polyol, a polyurethane acrylate, a polyester acrylic polyether acrylate, an epoxy acrylate, a polyurethane epoxy prepolymer, a nitrocellulose resin, a cellulose acetate propionate resin, a cellulose acetate butyrate hydrogenphthalate resin, a cellulose acetate resin, an aromatic polyamide resin, a polyimide resin, a polyamideimide resin, a polycarbonate resin, and a chlorinated polyolefin resin.
Has the advantages that: prevent the temperature sensitive heating head from heating and causing sticky or wrinkle and other adverse effects during the heat transfer; a resin having a Tg of 90 ℃ or higher and good heat resistance is preferable, and when the Tg of the resin is lower than this value, the heat resistance is significantly insufficient, causing tape breakage at the time of printing. The molecular weight is preferably 70000-90000, the toughness of the coating is poor when the molecular weight is low, and the stability of the back coating liquid is poor when the molecular weight is too large.
The invention provides a preparation method of a high-temperature and high-humidity resistant thermal transfer ribbon for achieving the second purpose, which comprises the following steps:
s1: preparing a solution:
back coating liquid: adding 10-50 parts of heat-resistant resin into 50-200 parts of solvent for dissolving, then adding 2-10 parts of filler particles, 0.1-1 part of lubricant, 0.5-5 parts of dispersant, 0.5-5 parts of antistatic agent and 1-12 parts of adhesive, stirring and mixing to prepare back coating liquid for later use;
release liquid: adding 5-35 parts of polyester resin and 0.5-5 parts of polyethylene glycol into 50-200 parts of solvent for dissolving to prepare release liquid for later use;
oil-ink liquid: adding 3-18 parts of polyester resin, 0.1-5 parts of vinyl chloride-vinyl acetate copolymer and 0.2-6 parts of chlorinated polypropylene into 50-200 parts of solvent for dissolving, then adding 6 parts of inorganic pigment and 2.5-15 parts of solid particles, stirring and mixing to prepare ink liquid for later use;
s2: corona is formed;
providing a substrate, and applying corona on one side of the substrate;
s3: coating;
coating the back coating liquid prepared in the step S1 on one corona-coated surface of the substrate in the step S2, and then drying to form a back coating for later use;
then coating the release liquid prepared in the step S1 on one surface of the substrate far away from the back coating in the step S2, and then drying to form a release layer;
and finally, coating the ink liquid prepared in the step S1 on one surface, far away from the substrate, of the release layer in the step S3 to obtain the high-temperature and high-humidity resistant thermal transfer ribbon.
Further, in the step S3, a ceramic anilox roller with 200-250 lines is adopted to coat the back coating liquid, the coating speed is 60-100m/min, and the drying temperature is 60-100 ℃; coating release liquid by adopting a 230-250-line ceramic anilox roller, wherein the coating speed is 60-100m/min, and the drying temperature is 60-100 ℃; the ink liquid is coated by adopting a ceramic anilox roller with 200-250 lines, the coating speed is 60-100m/min, and the drying temperature is 60-100 ℃.
Has the advantages that: the carbon ribbon prepared by the preparation method reduces contact between coatings after thermal transfer printing, improves weather resistance of the carbon ribbon, is suitable for various base materials, and has low manufacturing cost and simple and feasible process.
Drawings
FIG. 1 is a schematic view of a layer structure of a carbon ribbon according to the present invention;
FIG. 2 is a sample plate diagram of a print test of the present invention;
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1:
the embodiment provides a high temperature and high humidity resistant thermal transfer ribbon, which comprises a back coating, a substrate, a release layer and an ink layer, wherein the back coating, the substrate, the release layer and the ink layer are sequentially attached from top to bottom.
Wherein the matrix is polyethylene terephthalate with a thickness of 1-10 μm, and the silicone resin is one or a combination of more than two of epoxy resin modified silicone resin, methyl phenyl silicone resin, methyl silicone resin and acrylic acid modified silicone resin;
the back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 5 parts of epoxy resin modified silicone resin, 0.5 part of lubricant, 2 parts of dispersant, 2 parts of antistatic agent and 8 parts of polyisocyanate, wherein the coating thickness is 0.2-0.6 mu m;
the release layer is formed by coating the following raw materials in parts by weight: 43 parts of 2-butanone, 42.5 parts of toluene, 14 parts of polyester resin and 2.5 parts of polyethylene glycol;
the ink layer is formed by coating the following raw materials in parts by weight: 40 parts of 2-butanone, 41 parts of toluene, 9 parts of polyester resin, 0.5 part of vinyl chloride-vinyl acetate resin, 3 parts of chlorinated polypropylene, 6 parts of carbon black and 0.5 part of solid particles.
Preparing a high-temperature and high-humidity resistant thermal transfer ribbon:
one side of the polyethylene terephthalate is subjected to corona treatment;
taking materials according to the parts by weight of the components of the back coating, and mixing to prepare back coating liquid;
coating the back coating liquid on the corona-striking surface of the first PET base material by using a ceramic anilox roller with 200-250 lines, and drying at the temperature of 60 ℃ for later use;
taking materials according to the parts by weight of each component of the release layer, and mixing to prepare release liquid;
coating a release solution on one surface of the substrate far away from the back coating layer by using a 230-250-line ceramic anilox roller, and drying at the temperature of 60 ℃ for later use;
taking materials according to the weight parts of the components of the ink layer, and mixing to prepare the ink;
and (3) coating the ink liquid on one surface of the release layer, which is far away from the substrate, by using a ceramic anilox roller with 200-250 lines, and drying at the temperature of 60 ℃ to obtain the high-temperature and high-humidity resistant thermal transfer ribbon.
Example 2:
the present embodiment is different from embodiment 1 in that;
the back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 4 parts of epoxy resin modified silicone resin, 1 part of methyl phenyl silicone resin, 0.5 part of lubricant, 2 parts of dispersant, 2 parts of antistatic agent and 8 parts of polyisocyanate, wherein the coating thickness is 0.2-0.6 mu m.
Example 3:
this example is different from example 1 in that;
the back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 3 parts of epoxy resin modified silicone resin, 2 parts of methyl phenyl silicone resin, 0.5 part of lubricant, 2 parts of dispersant, 2 parts of antistatic agent and 8 parts of polyisocyanate, wherein the coating thickness is 0.2-0.6 mu m.
Example 4:
this example is different from example 1 in that;
the back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 2 parts of epoxy resin modified silicone resin, 3 parts of methyl phenyl silicone resin, 0.5 part of lubricant, 2 parts of dispersant, 2 parts of antistatic agent and 8 parts of polyisocyanate, wherein the coating thickness is 0.2-0.6 mu m.
Example 5:
this example is different from example 1 in that;
the back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 1 part of epoxy resin modified silicone resin, 4 parts of methyl phenyl silicone resin, 0.5 part of lubricant, 2 parts of dispersant, 2 parts of antistatic agent and 8 parts of polyisocyanate, wherein the coating thickness is 0.2-0.6 mu m.
Example 6:
this example is different from example 1 in that;
the back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 2 parts of epoxy resin modified silicone resin, 2 parts of methyl phenyl silicone resin, 1 part of methyl silicone resin, 0.5 part of lubricant, 2 parts of dispersant, 2 parts of antistatic agent and 8 parts of polyisocyanate, wherein the coating thickness is 0.2-0.6 mu m.
Example 7:
the present embodiment is different from embodiment 1 in that;
the back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 2 parts of epoxy resin modified silicone resin, 2 parts of methyl phenyl silicone resin, 1 part of acrylic modified silicone resin, 0.5 part of lubricant, 2 parts of dispersant, 2 parts of antistatic agent and 8 parts of polyisocyanate, wherein the coating thickness is 0.2-0.6 mu m.
Example 8:
this example is different from example 1 in that;
the back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 2 parts of epoxy resin modified silicone resin, 3 parts of acrylic modified silicone resin, 0.5 part of lubricant, 2 parts of dispersant, 2 parts of antistatic agent and 8 parts of polyisocyanate, wherein the coating thickness is 0.2-0.6 mu m.
Example 9:
this example is different from example 1 in that;
the back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 2 parts of epoxy resin modified silicone resin, 3 parts of methyl silicone resin, 0.5 part of lubricant, 2 parts of dispersant, 2 parts of antistatic agent and 8 parts of polyisocyanate, wherein the coating thickness is 0.2-0.6 mu m.
Comparative example 1:
the present example was carried out using the same base material, back coat layer, release layer, ink layer, coating thickness, and process as in example 1, except that no silicone resin filler particles were added to the back coat layer, and 3 parts of kaolin and 2 parts of calcium carbonate were added.
Comparative example 2:
in this example, the base material, the back coating layer, the release layer, the ink layer, the coating thickness, and the process were the same as those of example 1, but the back coating layer was prepared by adding 2 parts of kaolin and 3 parts of matting powder, without adding silicone resin filler particles.
Comparative example 3:
in this example, the substrate, back coating, release layer, ink layer, coating thickness, and process were the same as those of example 1, except that silicone resin filler particles were not added to the back coating, and 2 parts of matting agent and 3 parts of mica were added.
Comparative example 4:
the present example is the same substrate, back coating, release layer, ink layer, coating thickness, and process as example 1, except that no filler particles are added to the back coating.
Examples 1-9 and comparative examples 1-3 were tested for the performance of the printed samples.
The resin carbon tape obtained in this example was placed in an incubator for loop measurement using a label printer (model 105SLPlus manufactured by Zebra, inc.) under temperature/humidity conditions of-20 ℃/20%, 60 ℃/20%, and 60 ℃/90% for 12 hours, respectively, and the loop measurement was continued for 36 hours. The lines (0.6 pt thick) shown in figure 2 are transferred on the matte silver paper, the coated paper and the PP film; the printing speed was set at 12.7cm/s and the print density was 25.
The formed image was visually confirmed and evaluated by the following evaluation criteria:
a: no unprinted fine lines and dots are observed in the image;
b: some 3 or less unprinted thin lines and dots are observed in the image;
c: 3-20 or less unprinted thin lines and dots are observed in the image;
NG: more than 20 unprinted thin lines and dots were observed in the image.
And after the loop test is finished, observing the adhesion condition of the front surface and the back surface of the carbon ribbon, and evaluating by the following evaluation criteria:
a: after ring measurement is finished, the front surface and the back surface of the carbon ribbon are completely non-adhesive and non-stripped
B: after the ring test is finished, the front surface and the back surface of the carbon ribbon are slightly adhered and are not peeled off
C: slightly adhering the front and back surfaces of the carbon ribbon after the ring test is finished and partially peeling off
NG: after the ring test is finished, the front surface and the back surface of the carbon ribbon are largely adhered and partially peeled off
And (3) testing results:
in conclusion, according to the printing test results, compared with the comparative example 4, the silicone resin filler particles are added into the back coating layer in the examples 1 to 9, so that the printing quality is improved, and the weather resistance of the carbon ribbon is improved; through comparison of examples 1-9 with comparative examples 1-4, the spherical silicone resin filler particles are more effective than the flaky or platy kaolin, calcium carbonate, matting powder, mica and other filler particles, the spherical silicone resin can be uniformly distributed in the back coating, a similar 'bracket' structure is formed on the surface of the back coating, and the structure can effectively reduce the contact between the back coating and the front layer and realize better weather resistance.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
The present invention is not limited to the above embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The high-temperature and high-humidity resistant thermal transfer ribbon is characterized by comprising a back coating, a substrate, a release layer and an ink layer which are sequentially attached from top to bottom;
the back coating is prepared by mixing and coating the following raw materials in parts by weight: 50-200 parts of solvent, 30 parts of heat-resistant resin, 2-10 parts of filler particles, 0.1-1 part of lubricant, 0.5-5 parts of dispersant, 0.5-5 parts of antistatic agent and 1-12 parts of adhesive;
the release layer is formed by mixing and coating the following raw materials in parts by weight: 50-200 parts of solvent, 5-35 parts of polyester resin and 0.5-5 parts of polyethylene glycol;
the ink layer is formed by mixing and then coating the following raw materials in parts by weight: 50-200 parts of solvent, 3-18 parts of polyester resin, 0.1-5 parts of vinyl chloride-vinyl acetate copolymer, 0.2-6 parts of chlorinated polypropylene, 6 parts of inorganic pigment and 2.5-15 parts of solid particles.
2. The thermal transfer ribbon of claim 1, wherein the substrate is any one of a polyethylene terephthalate film, a 1, 4-polycyclohexylenedimethylene terephthalate film, polyethylene naphthalate, polyphenylene sulfide film, polystyrene film, polypropylene film, polyethylene film, polyvinyl chloride film, nylon film, and polyimide film.
3. The thermal transfer ribbon of claim 1, wherein the filler particles are silicone resin.
4. The thermal transfer ribbon of claim 1, wherein the solvent is one or a mixture of 2-butanone and toluene.
5. The thermal transfer ribbon with high temperature and high humidity resistance according to claim 1, wherein the substrate has a thickness of 0.5 to 50 μm, the back coating layer has a thickness of 0.5 to 1.2 μm, the release layer has a thickness of 0.2 to 0.6 μm, and the ink layer has a thickness of 0.3 to 0.8 μm.
6. The thermal transfer ribbon of claim 1, wherein the lubricant is any one of silicone oil, polyethylene wax, paraffin wax, higher fatty acid ester, higher fatty acid amide, higher aliphatic alcohol and metal soap; the dispersing agent is any one of anionic surfactant, cationic surfactant, nonionic surfactant and organic carboxylic acid; the antistatic agent is any one of long-chain alkyl quaternary ammonium salt, alkyl sulfonate, alkyl phosphoric acid, dithiocarbamate and ethoxylated aliphatic alkylamine; the adhesive is any one of cellulose acetate, polyvinyl acetal, acrylic resin and isocyanate resin.
7. The thermal transfer ribbon according to claim 1, wherein the inorganic pigment is carbon black; the solid particles are any one of silicon dioxide, zinc stearate and thermosetting acrylic acid particles.
8. The thermal transfer ribbon of claim 1, wherein the heat-resistant resin is any one of polyvinyl butyral resin, polyvinyl acetal resin, polyester resin, vinyl chloride-vinyl acetate copolymer polyether resin, polybutadiene resin, styrene-pentadiene copolymer acrylic polyol, polyurethane acrylate, polyester acrylic polyether acrylate, epoxy acrylate, polyurethane epoxy prepolymer, nitrocellulose resin, cellulose acetate propionate resin, cellulose acetate butyrate hydrophthalate resin, cellulose acetate resin, aromatic polyamide resin, polyimide resin, polyamideimide resin, polycarbonate resin, and chlorinated polyolefin resin.
9. The method for preparing the thermal transfer ribbon with high temperature and high humidity resistance according to any one of claims 1 to 8, which comprises the following steps:
s1: preparing a liquid:
back coating liquid: adding 10-50 parts of heat-resistant resin into 50-200 parts of solvent for dissolving, then adding 2-10 parts of filler particles, 0.1-1 part of lubricant, 0.5-5 parts of dispersant, 0.5-5 parts of antistatic agent and 1-12 parts of adhesive, stirring and mixing to prepare back coating liquid for later use;
release liquid: adding 5-35 parts of polyester resin and 0.5-5 parts of polyethylene glycol into 50-200 parts of solvent for dissolving to prepare release liquid for later use;
oil-ink liquid: adding 3-18 parts of polyester resin, 0.1-5 parts of vinyl chloride-vinyl acetate copolymer and 0.2-6 parts of chlorinated polypropylene into 50-200 parts of solvent for dissolving, then adding 6 parts of inorganic pigment and 2.5-15 parts of solid particles, stirring and mixing to prepare ink liquid for later use;
s2: corona is formed;
providing a substrate, and applying corona on one side of the substrate;
s3: coating;
coating the back coating liquid prepared in the step S1 on one corona-coated surface of the substrate in the step S2, and then drying to form a back coating for later use;
then coating the release solution prepared in the step S1 on one surface of the substrate far away from the back coating in the step S2, and drying to form a release layer;
and finally, coating the ink liquid prepared in the step S1 on one surface, far away from the substrate, of the release layer in the step S3 to obtain the high-temperature and high-humidity resistant thermal transfer ribbon.
10. The method for preparing the high temperature and high humidity resistant thermal transfer ribbon according to claim 9, wherein in step S3, a 200-250 line ceramic anilox roller is used for coating the back coating liquid, the coating speed is 60-100m/min, and the drying temperature is 60-100 ℃; coating release liquid by adopting a 230-250-line ceramic anilox roller, wherein the coating speed is 60-100m/min, and the drying temperature is 60-100 ℃; the ink liquid is coated by adopting a ceramic anilox roller with 200-250 lines, the coating speed is 60-100m/min, and the drying temperature is 60-100 ℃.
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Application publication date: 20221223 |