CN115447304A - Resin thermal transfer ribbon for thermal transfer printing and preparation method thereof - Google Patents

Resin thermal transfer ribbon for thermal transfer printing and preparation method thereof Download PDF

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Publication number
CN115447304A
CN115447304A CN202211231455.5A CN202211231455A CN115447304A CN 115447304 A CN115447304 A CN 115447304A CN 202211231455 A CN202211231455 A CN 202211231455A CN 115447304 A CN115447304 A CN 115447304A
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CN
China
Prior art keywords
parts
resin
coating
thermal transfer
wax
Prior art date
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Pending
Application number
CN202211231455.5A
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Chinese (zh)
Inventor
任天航
李辉
崔仲晖
李顺
嵇高晶
伍衡
文添俊
孟佳成
唐国初
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Hunan Dingyi Zhizao Digital Equipment Technology Development Co ltd
Hunan Dingyi Zhiyuan Technology Development Co Ltd
Original Assignee
Hunan Dingyi Zhizao Digital Equipment Technology Development Co ltd
Hunan Dingyi Zhiyuan Technology Development Co Ltd
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Application filed by Hunan Dingyi Zhizao Digital Equipment Technology Development Co ltd, Hunan Dingyi Zhiyuan Technology Development Co Ltd filed Critical Hunan Dingyi Zhizao Digital Equipment Technology Development Co ltd
Priority to CN202211231455.5A priority Critical patent/CN115447304A/en
Publication of CN115447304A publication Critical patent/CN115447304A/en
Pending legal-status Critical Current

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    • 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
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
    • B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/57—Three layers or more the last layer being a clear coat
    • B05D7/574—Three layers or more the last layer being a clear coat at least some layers being let to dry at least partially before applying the next layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/57—Three layers or more the last layer being a clear coat
    • B05D7/576—Three layers or more the last layer being a clear coat each layer being cured, at least partially, separately
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/385—Contact thermal transfer or sublimation processes characterised by the transferable dyes or pigments
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/392—Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents
    • B41M5/395—Macromolecular additives, e.g. binders
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    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/41—Base layers supports or substrates
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    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/423—Intermediate, backcoat, or covering layers characterised by non-macromolecular compounds, e.g. waxes
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    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
    • B41M5/443—Silicon-containing polymers, e.g. silicones, siloxanes
    • 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
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • 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
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C09D11/033—Printing inks characterised by features other than the chemical nature of the binder characterised by the solvent
    • 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
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C09D11/037—Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment
    • 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
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
    • C09D11/104—Polyesters
    • 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
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
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    • C09D123/08—Copolymers of ethene
    • C09D123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C09D123/0853—Vinylacetate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09D127/00—Coating compositions based on 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 a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on 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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
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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
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    • C09D129/00—Coating compositions based on 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; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
    • C09D129/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
    • 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
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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
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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
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Abstract

The invention relates to a resin thermal transfer ribbon for thermal transfer printing and a preparation method thereof, belonging to the technical field of soft label printing. The resin carbon belt for thermal transfer printing comprises a back coating, a substrate, a release layer, an ink layer and a bonding layer which are sequentially attached from top to bottom; the release layer is formed by mixing and coating the following raw materials in parts by weight: 70-90 parts of solvent, 3-9 parts of acrylic resin, 5-10 parts of adhesive resin and 2-5 parts of wax. The invention also discloses a preparation method of the resin carbon belt for thermal transfer printing. Has the advantages that: can greatly reduce the transfer printing defect of the carbon ribbon on the surface of the uneven substrate.

Description

Resin thermal transfer ribbon for thermal transfer printing and preparation method thereof
Technical Field
The invention belongs to the technical field of soft label printing, and particularly relates to a resin thermal transfer ribbon for thermal transfer printing and a preparation method thereof.
Background
The thermal transfer printing is a printing method in which a thermal transfer printer heats a carbon ribbon with a transferable ink layer through a printing head, and the ink layer is transferred to a substrate. The image formed by the thermal fusion transfer method is suitable for printing images such as characters and bar codes because of its high density and high definition. At present, the resin-based carbon ribbon on the market has transfer printing defects such as trailing, block falling, incomplete transfer printing and the like when being transferred to the surface of an uneven base material. The release coating mainly has poor performance of isolating a base film and an ink coating, the existing release coating is prepared by coating one or more coating liquids obtained by using polyester resin on the back of the base film, the melting point range is limited, and the polyester is difficult to resist high temperature, so that the problems of trailing printing, block falling, incomplete transfer printing and the like are caused after transfer printing.
Therefore, a resin thermal transfer ribbon for thermal transfer printing and a preparation method thereof are provided to solve the defects in the prior art.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a resin thermal transfer ribbon for thermal transfer printing, which can significantly reduce transfer defects of the thermal transfer ribbon on an uneven surface of a substrate and has a certain solvent resistance.
The technical scheme for solving the technical problems is as follows: the resin carbon belt for thermal transfer printing comprises a back coating, a substrate, a release layer, an ink layer and a bonding 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: 70-90 parts of solvent and 50-80 parts of heat-resistant resin; the release layer is formed by mixing and then coating the following raw materials in parts by weight: 70-90 parts of solvent, 3-9 parts of acrylic resin, 5-10 parts of adhesive resin and 2-5 parts of wax; the ink layer is formed by mixing and then coating the following raw materials in parts by weight: 70-80 parts of solvent, 10-20 parts of polyester resin, 10-15 parts of inorganic pigment and 0-5 parts of dispersant; the adhesive layer is formed by mixing and coating the following raw materials in parts by weight: 40-60 parts of solvent, 10-20 parts of polyester resin and 20-40 parts of adhesive resin.
Has the advantages that: can greatly reduce the transfer defect of the carbon ribbon on the surface of the uneven substrate and has certain solvent resistance.
Description of the principle: the acrylic resin has good film forming property and dimensional stability after being heated by the printing head, can ensure that heat is transferred to the ink layer and good edge cutting property of the acrylic resin per se is ensured, and the resolution of transfer printing is improved, but the selection and the using amount of the acrylic resin are very critical, and particularly, the molecular weight and the glass transition temperature (TG value) have great influence on the acrylic resin; the average molecular weight of the selected acrylic resin is 10000-50000, preferably 18000-22000, the fluidity of the selected acrylic resin is poor, the acrylic resin cannot be melted and flowed sufficiently when a printing head is heated, and the pattern cannot be completely transferred; acrylic acid having an excessively low molecular weight has poor film-forming properties, resulting in uneven distribution, which may result in the loss of a transferred pattern. The TG (melting point) value of the selected acrylic resin is 65-150 ℃, preferably 85-130 ℃, the TG value can influence the edge cutting property of the acrylic resin in the transfer printing process, and the excessively low TG value can cause the increase of the fluidity and the trailing and block falling problems of the transfer printing; an excessively high TG value may affect the transfer of heat during transfer, and thus the integrity of the transferred image.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the matrix is any one of polypropylene, polyethylene naphthalate, polyethylene terephthalate, polyethylene, polyvinyl alcohol and polymethyl methacrylate.
Has the advantages that: the film is adopted as the base material, so that the back coating layer and the release layer can be better ensured to be effectively coated on the surface of the base material.
The heat-resistant resin is any one or a combination of two or more of polyurethane-modified silicone resin, acrylic-modified silicone resin, polyvinyl acetal resin, and polyvinyl butyral resin.
Has the advantages that: the heat transfer and abrasion resistance protect the printing head and the printing substrate.
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, so that the components in the back coating layer, the release layer, the ink layer and the bonding layer can be fully dispersed and mixed.
Further, the thickness of the substrate is 2-15 μm, the thickness of the back coating layer is 0.2-1.0 μm, the thickness of the release layer is 0.1-0.4 μm, the thickness of the ink layer is 0.3-0.5 μm, and the thickness of the adhesion layer is 0.1-0.3 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 adhesive resin is one or a mixture of two of ethylene-vinyl acetate resin and vinyl chloride-vinyl acetate resin.
Has the advantages that: the closing effect between the release layer and the ink layer can be improved; meanwhile, the resin with the adhesive property improves the film forming property and the flowing property of the acrylic resin, can further improve the definition of the image of the uneven transferred body, and reduces the transfer defects such as block falling, tailing and the like.
Further, the wax is any one of microcrystalline wax, carnauba wax, paraffin wax, fischer tropsch wax, japan wax, beeswax, spermaceti wax, chinese wax, wool wax, shellac wax, and candelilla wax.
Has the beneficial effects that: by including wax in the release layer, the rub resistance of the printed matter produced by the thermal transfer sheet of the present invention can be improved.
Further, the inorganic pigment is carbon black.
Has the advantages that: the coloring effect is good.
The invention provides a method for preparing a resin carbon ribbon for thermal transfer printing, which comprises the following steps:
s1: preparing a liquid:
back coating liquid: adding the heat-resistant resin into the solvent to dissolve to prepare back coating liquid for later use;
releasing liquid: adding 3-9 parts of acrylic resin and 5-10 parts of adhesive resin into 70-90 parts of solvent for dissolving, then adding 2-5 parts of wax, stirring and mixing to prepare release liquid for later use;
oil-ink liquid: adding 10-20 parts of polyester resin into 70-80 parts of solvent for dissolving, then adding 10-15 parts of inorganic pigment and 0-5 parts of dispersant, stirring and mixing to prepare ink liquid for later use;
and (3) carrying out liquid adhesion: adding 10-20 parts of polyester resin and 20-40 parts of adhesive resin into 20-40 parts of solvent for dissolving to prepare a bonding solution 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;
coating the ink liquid prepared in the step S1 on one surface of the release layer, far away from the substrate, in the step S3, and then drying to form an ink layer;
and finally, coating the bonding liquid prepared in the step S1 on one surface, far away from the release layer, of the ink layer in the step S3 to obtain the resin carbon belt for thermal transfer printing.
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, the drying temperature is 60-100 ℃, and the drying time is 40-60S; coating release liquid by using a ceramic anilox roller with 200-250 lines, wherein the coating speed is 60-100m/min, the drying temperature is 20-100 ℃, and the drying time is 40-60s; coating ink liquid by adopting a ceramic anilox roller with 200-250 lines, wherein the coating speed is 60-100m/min, the drying temperature is 40-100 ℃, and the drying time is 40-60s; coating the adhesive liquid by adopting a linear ceramic anilox roller, wherein the coating speed is 60-100m/min, the drying temperature is 80-100 ℃, and the drying time is 40-60s.
Has the advantages that: the carbon ribbon prepared by the preparation method solves the printing defects of trailing or block dropping and the like generated during the transfer printing on the surface of the uneven base material, is suitable for different 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 to illustrate, but are not to be construed to limit the scope of the invention.
Example 1:
the embodiment provides a resin carbon ribbon for thermal transfer printing, including top-down laminating setting's back coating, base member, release layer, printing ink layer and the layer of gluing in proper order.
Wherein the substrate is polyethylene terephthalate with the thickness of 4.3 mu m;
the back coating is formed by coating the following raw materials in parts by weight: 30 parts of 2-butanone, 30 parts of toluene, 10 parts of polyurethane modified organic silicon resin, 10 parts of acrylic modified organic silicon resin and 30 parts of polyvinyl butyral resin, wherein the coating thickness is 0.2-1.0 mu m;
the release layer is formed by coating the following raw materials in parts by weight: 45 parts of 2-butanone, 45 parts of toluene, 4 parts of acrylic resin (molecular weight 30000, tg of 65 ℃), 5.75 parts of adhesive resin and 0.25 part of wax, wherein the coating thickness is 1 mu m;
the ink layer is formed by coating the following raw materials in parts by weight: 40 parts of 2-butanone, 40 parts of toluene, 41 parts of polyester resin, 9 parts of carbon black and 1 part of dispersing agent;
the adhesive layer is formed by coating the following raw materials in parts by weight: 30 parts of 2-butanone, 30 parts of toluene, 10 parts of polyester resin and 30 parts of adhesive resin.
Preparation of resin carbon tape for thermal transfer printing:
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 substrate by using a 230-line ceramic anilox roller, and drying at the temperature of 60 ℃ for 60s for later use;
taking materials according to the parts by weight of each component of the release layer, and mixing to prepare receiving liquid;
coating the receiving liquid on one side of the substrate far away from the back coating layer by using a 230-line ceramic anilox roller, and drying at the temperature of 60 ℃ for 60s for later use;
coating the receiving liquid on one surface of the release layer, which is far away from the substrate, by using a 230-line ceramic anilox roller, and drying at the temperature of 60 ℃ for 60s for later use;
and coating the receiving liquid on the surface of the ink layer, which is far away from the release layer, by using a 230-line ceramic anilox roller to obtain the resin carbon belt for thermal transfer printing.
Example 2:
the present embodiment is different from embodiment 1 in that;
the release layer is formed by coating the following raw materials in parts by weight: 45 parts of 2-butanone, 45 parts of toluene, 5 parts of acrylic resin (molecular weight 25000, tg 85 ℃), 4.75 parts of adhesive resin and 0.25 part of wax, and the coating thickness is 1 μm.
Example 3:
the present embodiment is different from embodiment 1 in that;
the release layer is formed by coating the following raw materials in parts by weight: 45 parts of 2-butanone, 45 parts of toluene, 6 parts of acrylic resin (molecular weight 20000, tg of 110 ℃), 3.75 parts of adhesive resin and 0.25 part of wax, and the coating thickness is 1 μm.
Example 4:
this example is different from example 1 in that;
the release layer is formed by coating the following raw materials in parts by weight: 45 parts of 2-butanone, 45 parts of toluene, 7 parts of acrylic resin (molecular weight 23000, tg 120 ℃), 2.75 parts of adhesive resin and 0.25 part of wax, and the coating thickness was 0.6. Mu.m.
Example 5:
this example is different from example 1 in that;
the release layer is formed by coating the following raw materials in parts by weight: 45 parts of 2-butanone, 45 parts of toluene, 8 parts of acrylic resin (molecular weight 28000, tg 130 ℃), 1.75 parts of adhesive resin and 0.25 part of wax, and the coating thickness is 0.6 μm.
It should be noted that, in the case of the layers other than the release layer, the kind and content of the substance may be changed within the above range, and the properties of the obtained product may be similar.
Comparative example 1:
the same ink layer, adhesive layer and back coat formulations, coating thickness, coating method, and printing method as in examples 1 to 5 were used, but the resin in the release layer was changed to a polyester resin.
Comparative example 2:
the same ink layer, adhesive layer and back coat formulations, coating thickness, coating method, printing method as in examples 1 to 5 were used, but the resin in the release layer was changed to a conventional polyethylene wax.
Comparative example 3:
the same ink layer, adhesive layer and back coating formulations, coating thickness, coating method, printing method as in examples 1-5 were used, but the release layer was not applied.
Examples 1-5 and comparative examples 1-3 were tested for the performance of the printed samples.
The resin carbon tape obtained in this example was printed with a line (0.6 pt thick) shown in fig. 2 on coated paper using a label printer (model 105SLPlus manufactured by Zebra corporation); 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 missing block and trailing are observed in the image, and the edge of the image has no saw teeth;
b: slight chipping and tailing are observed in the image, and slight sawtooth appears on the edge of the image;
NG: a large number of blocks and streaks are observed in the image, with a large number of jaggies at the image edges.
And (3) testing results:
item Example 1 Example 2 Example 3 Example 4 Example 5
Print testing NG B A A NG
Item Comparative example 1 Comparative example 2 Comparative example 3
Print testing B B NG
In summary, the above printing test results show that, in the examples 1 to 5, compared with the comparative examples 1 to 2, when the acrylic resin is added to the release layer and the acrylic resin with the molecular weight of 18000 to 22000 is selected, the fluidity is poor due to high molecular weight, and the acrylic resin cannot melt and flow sufficiently when the print head is heated, so that the pattern cannot be completely transferred; acrylic acid having an excessively low molecular weight has poor film-forming properties, resulting in uneven distribution that may result in loss of a transferred pattern; the TG (melting point) value of the acrylic resin is 65-150 ℃, preferably 85-130 ℃, the TG value can influence the edge cutting property of the acrylic resin in the transfer printing process, and the too low TG value can cause the fluidity to be increased, thereby causing the problems of transfer printing tailing and block falling; an excessively high TG value may affect the transfer of heat during the transfer process, thereby affecting the integrity of the transferred image; in comparison with comparative example 3, examples 1 to 5 were selected, and the release layer was provided to improve the integrity of the transferred pattern.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, 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. A resin carbon ribbon for thermal transfer printing is characterized by comprising a back coating, a substrate, a release layer, an ink layer and a bonding 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: 70-90 parts of solvent and 50-80 parts of heat-resistant resin;
the release layer is formed by mixing and then coating the following raw materials in parts by weight: 70-90 parts of solvent, 3-9 parts of acrylic resin, 5-10 parts of adhesive resin and 2-5 parts of wax;
the ink layer is formed by mixing and then coating the following raw materials in parts by weight: 70-80 parts of solvent, 10-20 parts of polyester resin, 10-15 parts of inorganic pigment and 0-5 parts of dispersant;
the adhesive layer is formed by mixing and coating the following raw materials in parts by weight: 40-60 parts of solvent, 10-20 parts of polyester resin and 20-40 parts of adhesive resin.
2. The resin carbon tape for thermal transfer printing according to claim 1, wherein the substrate is any one of polypropylene, polyethylene naphthalate, polyethylene terephthalate, polyethylene, polyvinyl alcohol, and polymethyl methacrylate.
3. The resin thermal transfer ribbon for thermal transfer printing according to claim 1, wherein the heat-resistant resin is any one of or a combination of two or more of a urethane-modified silicone resin, an acrylic-modified silicone resin, a polyvinyl acetal-based resin, and a polyvinyl butyral-based resin.
4. The resin thermal transfer ribbon for thermal transfer printing according to claim 1, wherein the solvent is one or a mixture of two of 2-butanone and toluene.
5. The resin thermal transfer printing ribbon as claimed in claim 1, wherein the substrate has a thickness of 2 to 15 μm, the back coating layer has a thickness of 0.2 to 1.0 μm, the release layer has a thickness of 0.1 to 0.4 μm, the ink layer has a thickness of 0.3 to 0.5 μm, and the adhesion layer has a thickness of 0.1 to 0.3 μm.
6. The resinous carbon ribbon for thermal transfer printing according to claim 1, wherein the adhesive resin is one or a mixture of two of ethylene-vinyl acetate resin and vinyl chloride-vinyl acetate resin.
7. The resin thermal transfer printing ribbon according to claim 1, wherein the wax is any one of microcrystalline wax, carnauba wax, paraffin wax, fischer-tropsch wax, japan wax, beeswax, spermaceti wax, white wax, wool wax, shellac wax, and candelilla wax.
8. The resinous carbon ribbon for thermal transfer printing of claim 1, wherein the inorganic pigment is carbon black.
9. A method of manufacturing a resin thermal transfer printing ribbon according to any one of claims 1 to 8, comprising the steps of:
s1: preparing a liquid:
back coating liquid: adding 50-80 parts of heat-resistant resin into 70-90 parts of solvent for dissolving to prepare back coating liquid for later use;
release liquid: adding 3-9 parts of acrylic resin and 5-10 parts of adhesive resin into 70-90 parts of solvent for dissolving, then adding 2-5 parts of wax, stirring and mixing to prepare release liquid for later use;
oil-ink liquid: adding 10-20 parts of polyester resin into 70-80 parts of solvent for dissolving, then adding 10-15 parts of inorganic pigment and 0-5 parts of dispersant, stirring and mixing to prepare ink liquid for later use;
and (3) carrying out liquid adhesion: adding 10-20 parts of polyester resin and 20-40 parts of adhesive resin into 20-40 parts of solvent for dissolving to prepare adhesive 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;
coating the ink liquid prepared in the step S1 on one surface of the release layer, far away from the substrate, in the step S3, and then drying to form an ink layer;
and finally, coating the bonding liquid prepared in the step S1 on one surface, far away from the release layer, of the ink layer in the step S3 to obtain the resin carbon belt for thermal transfer printing.
10. The method for preparing the resin carbon ribbon for thermal transfer printing according to claim 9, wherein in the step S3, a back coating liquid is coated by using a ceramic anilox roller with 200-250 lines, the coating speed is 60-100m/min, the drying temperature is 60-100 ℃, and the drying time is 40-60S; coating release liquid by using a ceramic anilox roller with 200-250 lines, wherein the coating speed is 60-100m/min, the drying temperature is 20-100 ℃, and the drying time is 40-60s; coating oil ink by adopting a linear ceramic anilox roller, wherein the coating speed is 60-100m/min, the drying temperature is 40-100 ℃, and the drying time is 40-60s; coating the adhesive liquid by using a ceramic anilox roller with 200-250 lines, wherein the coating speed is 60-100m/min, the drying temperature is 80-100 ℃, and the drying time is 40-60s.
CN202211231455.5A 2022-10-09 2022-10-09 Resin thermal transfer ribbon for thermal transfer printing and preparation method thereof Pending CN115447304A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116535913A (en) * 2023-03-22 2023-08-04 香洋新材料（江苏）有限公司 Thermal transfer release for digital printing and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116535913A (en) * 2023-03-22 2023-08-04 香洋新材料（江苏）有限公司 Thermal transfer release for digital printing and preparation method thereof

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