CN111778773A - Thermal sensitive paper with high retention rate and ethanol resistance and manufacturing method thereof - Google Patents
Thermal sensitive paper with high retention rate and ethanol resistance and manufacturing method thereof Download PDFInfo
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- CN111778773A CN111778773A CN202010454816.7A CN202010454816A CN111778773A CN 111778773 A CN111778773 A CN 111778773A CN 202010454816 A CN202010454816 A CN 202010454816A CN 111778773 A CN111778773 A CN 111778773A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
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Abstract
The invention provides a thermal sensitive paper with high retention rate and ethanol resistance and a manufacturing method thereof, wherein a back glue layer, a first isolation layer, a raw paper layer, a thermal sensitive color development layer, a second isolation layer and an organic solvent glue resistant coating are arranged in a laminating way from bottom to top, wherein the first isolation layer, the second isolation layer and the organic solvent glue resistant coating can provide an anti-permeation barrier layer aiming at ethanol, so that the thermal sensitive paper can effectively prevent the ethanol from permeating into the thermal sensitive color development layer when being applied to the occasions where the ethanol exists, and the condition of color development degradation of the thermal sensitive color development layer is avoided, thereby improving the retention rate and the ethanol resistance of the thermal sensitive paper.
Description
Technical Field
The invention relates to the technical field of thermal paper, in particular to thermal paper with high retention rate and ethanol resistance and a manufacturing method thereof.
Background
The thermal paper is also called thermal surface recording paper or thermal copy paper, which is essentially a processed paper, and a layer of thermal color developing coating is coated on a base paper, and then the thermal color developing coating performs color development reaction under the action of thermal printing, so that corresponding characters or patterns are formed. The prior art thermal paper is simply coated with a layer of thermal-sensitive color developing coating on the base paper, and the structure is simpler. At present, the thermal paper is widely applied to the medical field, so that the thermal paper inevitably contacts alcohol in the using process, and the existing thermal paper can generate the condition of color degradation under the condition of contacting the alcohol, thereby seriously reducing the thermal color rendering performance of the thermal paper and preventing the thermal paper from being popularized and applied in the medical field.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the thermal sensitive paper with high retention rate and ethanol resistance, the thermal sensitive paper with high retention rate and ethanol resistance is formed by laminating a back glue layer, a first isolating layer, a raw paper layer, a thermal sensitive color development layer, a second isolating layer and an organic solvent resistant glue coating from bottom to top, wherein the first isolating layer, the second isolating layer and the organic solvent resistant glue coating can provide an anti-permeation barrier layer aiming at ethanol, so that the thermal sensitive paper can effectively prevent the ethanol from permeating into the thermal sensitive color development layer when being applied to the occasions where the ethanol exists, and avoid the condition of color development degradation of the thermal sensitive color development layer, thereby improving the retention rate and the ethanol resistance of the thermal sensitive paper.
The invention provides a thermal sensitive paper with high retention rate and ethanol resistance, which is characterized in that:
the thermal sensitive paper with high retention rate and ethanol resistance comprises a back glue layer, a first isolation layer, a raw paper layer, a thermal sensitive color development layer, a second isolation layer and an organic solvent resistant glue coating which are sequentially laminated from bottom to top; wherein the content of the first and second substances,
the back glue layer is formed by a polyester resin material with a composite structure;
the first isolation layer is formed by coating a first isolation coating liquid with opposite polarity to ethanol on the back glue layer;
the raw paper layer is formed by bonding a raw paper fiber layer with a composite structure on the first isolating layer;
the thermosensitive color development layer is formed by coating thermosensitive color development paint on the raw paper layer;
the second isolation layer is formed by coating a second isolation coating liquid with opposite polarity to ethanol on the thermosensitive color development layer;
the organic solvent glue resistant coating is formed by coating a water-washed polyester sol on the second isolation layer;
further, in the back adhesive layer, the polyester resin material having the composite structure includes a first polyester resin layer having a first thickness and a second polyester resin layer having a second thickness; wherein the content of the first and second substances,
the first thickness is greater than the second thickness;
the hardness of the polyester resin adopted by the first polyester resin layer is greater than that of the polyester resin adopted by the second polyester resin layer;
further, the first polyester resin layer and the second polyester resin layer jointly form the back glue layer in a laminating and pressing mode or a co-extrusion molding mode;
the polyester resin adopted by the first polyester resin layer and the polyester resin adopted by the second polyester resin layer have the characteristic of being mutually insoluble;
further, in the first separator, the first separator coating liquid is prepared from acrylic latex, titanium dioxide particles, light calcium carbonate, a crosslinking agent and water in a weight ratio of 15-25: 0.5-1.5: 1.5-2: 0.1-0.3: 40-55 weight ratio;
the first isolation coating liquid is formed by mixing at the temperature of 20-35 ℃;
further, after the first isolation coating liquid is coated on the back glue layer, infrared radiation curing treatment is carried out; wherein the energy density of the infrared radiation curing treatment is 150-1000cal/cm2And the irradiation duration is 30s-90 s;
further, in the raw paper layer, the raw paper fiber layer with the composite structure is formed by sequentially overlapping a plurality of raw paper fiber films; wherein the content of the first and second substances,
among the plurality of base paper fiber films, base paper fiber films located at the bottommost surface and the topmost surface have the same first thickness, while other base paper fiber films located in the middle have the same second thickness, and the first thickness is greater than the second thickness;
alternatively, the first and second electrodes may be,
in the thermosensitive color developing layer, the thermosensitive color developing coating is prepared by mixing an organic solvent, thermosensitive color changing particles, a dispersant, a developer and an antioxidant in a ratio of 50-80: 15-30: 1-5: 1-8: 0.5-3 by weight ratio;
the heat-sensitive color-developing coating is formed by uniformly mixing the organic solvent, the heat-sensitive color-developing particles, the dispersing agent, the color-developing agent and the antioxidant at the temperature of 20-30 ℃;
further, in the second separator, the second separator coating liquid is prepared from acrylic latex, titanium dioxide particles, light calcium carbonate, a crosslinking agent and water in a weight ratio of 15-25: 0.5-1.5: 1.5-2: 0.1-0.3: 40-55 weight ratio;
the second isolation coating liquid is formed by mixing at the temperature of 20-35 ℃;
further, after the second isolation coating liquid is coated on the back glue layer, infrared radiation curing treatment is also carried out; wherein the energy density of the infrared radiation curing treatment is 150-1000cal/cm2And the irradiation duration is 30s-90 s;
alternatively, the first and second electrodes may be,
the water-washed polyester sol of the organic solvent glue resistant coating is water-washed ultraviolet resistant silicone oil polyester sol
Further, the step of coating a second isolation coating liquid with an opposite polarity to ethanol on the thermosensitive color developing layer to form the second isolation layer specifically comprises the steps of acquiring fluid structure plane information of the second isolation coating liquid with the opposite polarity according to ethanol molecule basic information corresponding to the ethanol, constructing a reticular ethanol data structure model according to the fluid structure plane information, determining whether to execute the operation of the second isolation coating liquid according to the ethanol molecule interception effect of the reticular ethanol data structure model, and the specific process is that,
step S1, according to the ethanol molecular structure, obtaining the chemical bond structure basic information M (C, H, M) corresponding to the carbon atom and the hydrogen atom of the ethanol molecule in the ethanol solution with different concentrations through the following formula (1)0)
In the above formula (1) In the formula, n is the ethanol concentration of the normal-temperature saturated ethanol solution, C is the carbon atom number of ethanol, H is the hydrogen atom number of ethanol, and M is0The chemical bond structure information of the ethanol molecules, x is the mass percent of carbon atoms of ethanol solutions with different concentrations, y is the mass percent of hydrogen atoms of the ethanol solutions with different concentrations, and α is the chemical bond structure quantity of the ethanol solutions with different concentrations;
step S2, according to the basic information M (C, H, M) of the chemical bond structure0) And acquiring fluid structure plane information F (a, r) of the second barrier coating liquid of the opposite polarity by the following formula (2)i)
In the above formula (2), e is a natural constant, ln is a logarithmic function based on the natural constant e, ξ is a barrier ratio of the second barrier coating liquid of opposite polarity to the ethanol molecule, and a is 1cm2Cumulative gap area per unit area of fluid structure corresponding to the second isolation coating liquid of opposite polarity, i being the number of molecules of opposite polarity in the second isolation coating liquid of opposite polarity, riIs a value of an inter-molecular distance of reversed polarity corresponding to the number of the reversed polarity molecules in the second isolation coating liquid of reversed polarity is i, (a) is structural information of the reversed polarity molecules in the second isolation coating liquid of reversed polarity;
step S3, according to the fluid structure plane information F (a, r) of the second isolation coating liquid with opposite polarityi) And performing superposition iteration processing by the following formula (3) to construct a reticular ethanol data structure model, and determining whether to execute the operation of a second isolation coating liquid according to the ethanol molecule interception effect of the reticular ethanol data structure model
In the above formula (3), exp is an exponential function with a natural constant e as a base, d is a gap difference between the second isolation layer and the organic solvent resistant glue coating layer, W is a cumulative gap area of the fluid structure corresponding to the second isolation coating liquid of opposite polarity, η is a barrier ratio of the reticular ethanol-proof structure molecular material, W (η) is a minimum cumulative gap area value corresponding to the reticular ethanol data structure model, and when the value of W (η) approaches 1, it indicates that the current reticular ethanol data structure model has a good ethanol molecule interception effect, and determines to perform the operation of the second isolation coating liquid.
The invention also provides a method for manufacturing the thermal sensitive paper with high retention rate and ethanol resistance, which is characterized by comprising the following steps: the manufacturing method of the thermal sensitive paper with high retention rate and ethanol resistance comprises the following steps:
step S1, forming a back glue layer by using a polyester resin material with a composite structure;
step S2, coating a first isolation coating liquid with the opposite polarity to the ethanol on the back glue layer to form a first isolation layer;
step S3, adhering a base paper fiber layer with a composite structure on the first isolation layer to form a base paper layer;
step S4, coating the thermosensitive color developing coating on the raw paper layer to form a thermosensitive color developing layer;
step S5, coating the second isolation coating liquid with the opposite polarity to the ethanol on the heat-sensitive color development layer to form a second isolation layer, specifically including obtaining the fluid structure plane information of the second isolation coating liquid with the opposite polarity according to the ethanol molecule basic information corresponding to the ethanol, so as to construct a reticular ethanol data structure model, and then determining whether to execute the operation of the second isolation coating liquid according to the ethanol molecule interception effect of the reticular ethanol data structure model, wherein the specific process is that,
step S501, according to the ethanol molecular structure, obtaining the chemical bond structure basic information M (C, H, M) corresponding to the carbon atom and the hydrogen atom of the ethanol molecule in the ethanol solution with different concentrations through the following formula (1)0)
In the above formula (1), n is saturated at room temperatureThe ethanol concentration of the ethanol solution, C is the number of carbon atoms of ethanol, H is the number of hydrogen atoms of ethanol, M0The chemical bond structure information of the ethanol molecules, x is the mass percent of carbon atoms of ethanol solutions with different concentrations, y is the mass percent of hydrogen atoms of the ethanol solutions with different concentrations, and α is the chemical bond structure quantity of the ethanol solutions with different concentrations;
step S502, according to the basic information M (C, H, M) of the chemical bond structure0) And acquiring fluid structure plane information F (a, r) of the second barrier coating liquid of the opposite polarity by the following formula (2)i)
In the above formula (2), e is a natural constant, ln is a logarithmic function based on the natural constant e, ξ is a barrier ratio of the second barrier coating liquid of opposite polarity to the ethanol molecule, and a is 1cm2Cumulative gap area per unit area of fluid structure corresponding to the second isolation coating liquid of opposite polarity, i being the number of molecules of opposite polarity in the second isolation coating liquid of opposite polarity, riIs a value of an inter-molecular distance of reversed polarity corresponding to the number of the reversed polarity molecules in the second isolation coating liquid of reversed polarity is i, (a) is structural information of the reversed polarity molecules in the second isolation coating liquid of reversed polarity;
step S503, according to the fluid structure plane information F (a, r) of the second isolation coating liquid with opposite polarityi) And performing superposition iteration processing by the following formula (3) to construct a reticular ethanol data structure model, and determining whether to execute the operation of a second isolation coating liquid according to the ethanol molecule interception effect of the reticular ethanol data structure model
In the above formula (3), exp is an exponential function with a natural constant e as a base, d is a gap difference between the second isolation layer and the organic solvent resistant glue coating, W is a cumulative gap area of a fluid structure corresponding to the second isolation coating liquid with opposite polarity, η is a barrier ratio of the reticular ethanol-proof structure molecular material, W (η) is a minimum cumulative gap area value corresponding to the reticular ethanol data structure model, and when the value of W (η) approaches to 1, it indicates that the current reticular ethanol data structure model has a good ethanol molecule interception effect, and determines to perform the operation of the second isolation coating liquid;
and step S6, coating the water-washed polyester sol on the second isolation layer to form an organic solvent glue resistant coating.
Compared with the prior art, the thermal sensitive paper with high retention rate and ethanol resistance is formed by laminating the back glue layer, the first isolation layer, the raw paper layer, the thermal sensitive color development layer, the second isolation layer and the organic solvent resistant glue coating from bottom to top, wherein the first isolation layer, the second isolation layer and the organic solvent resistant glue coating can provide an anti-permeation barrier layer aiming at ethanol, so that the thermal sensitive paper can effectively prevent the ethanol from permeating into the thermal sensitive color development layer when being applied to occasions where the ethanol exists, and avoid the condition of color development degradation of the thermal sensitive color development layer, thereby improving the retention rate and the ethanol resistance of the thermal sensitive paper.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the thermal paper with high retention rate and ethanol resistance provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic structural diagram of a thermal paper with high retention rate and ethanol-proof performance according to an embodiment of the present invention is provided. The thermal sensitive paper with high retention rate and ethanol resistance comprises a back glue layer, a first isolation layer, a raw paper layer, a thermal sensitive color development layer, a second isolation layer and an organic solvent resistant glue coating which are sequentially laminated from bottom to top; wherein the content of the first and second substances,
the back glue layer is formed by a polyester resin material with a composite structure;
the first isolating layer is formed by coating a first isolating coating liquid with opposite polarity to ethanol on the back glue layer;
the raw paper layer is formed by bonding a raw paper fiber layer with a composite structure on the first isolating layer;
the thermosensitive color development layer is formed by coating thermosensitive color development paint on the raw paper layer;
the second isolation layer is formed by coating a second isolation coating liquid with opposite polarity to the ethanol on the thermosensitive color development layer;
the organic solvent glue resistant coating is formed by coating a water-washed polyester sol on the second isolation layer.
The heat-sensitive paper with high retention rate and ethanol resistance performs multiple barrier isolation on ethanol in the application occasion of the heat-sensitive paper by arranging the first isolation layer, the second isolation layer and the organic solvent glue resistant coating, so that the ethanol is effectively prevented from reaching the heat-sensitive color development layer through the permeation diffusion effect to corrode the heat-sensitive color development coating in the heat-sensitive color development layer, and the heat-sensitive paper is ensured to have higher retention rate and ethanol permeability resistance.
Preferably, in the back adhesive layer, the polyester resin material having a composite structure includes a first polyester resin layer having a first thickness and a second polyester resin layer having a second thickness; wherein the content of the first and second substances,
the first thickness is greater than the second thickness;
the hardness of the polyester resin adopted by the first polyester resin layer is greater than that of the polyester resin adopted by the second polyester resin layer.
The back glue layer is formed by laminating a first polyester resin layer and a second polyester resin layer together, so that the mechanical strength of the back glue layer can be effectively improved to effectively protect the raw paper layer, and in addition, the scratch resistance and the crease formation resistance of the back glue layer can be further improved by setting the hardness of the polyester resin adopted by the first polyester resin layer to be greater than that of the polyester resin adopted by the second polyester resin layer.
Preferably, the first polyester resin layer and the second polyester resin layer jointly form the back glue layer in a laminating and pressing mode or a co-extrusion molding mode;
the polyester resin adopted by the first polyester resin layer and the polyester resin adopted by the second polyester resin layer have the characteristic of being mutually insoluble.
The back glue layer is formed in a laminating and pressing mode or a co-extrusion molding mode, the manufacturing difficulty and the manufacturing cost of the back glue layer can be reduced, and the polyester resin adopted by the first polyester resin layer and the polyester resin adopted by the second polyester resin layer are designed to have the characteristic of being insoluble with each other, so that the situation that the back glue layer is softened in the using process can be avoided.
Preferably, in the first separator, the first separator coating liquid is a mixture of an acrylic latex, titanium dioxide particles, precipitated calcium carbonate, a crosslinking agent and water in a ratio of 15 to 25: 0.5-1.5: 1.5-2: 0.1-0.3: 40-55 weight ratio;
the first isolation coating liquid is formed by mixing under the temperature condition of 20-35 ℃.
The first barrier coating liquid formed by the above components, weight ratio and temperature conditions has good coating film formability and ethanol barrier properties.
Preferably, after the first isolation coating liquid is coated on the back glue layer, infrared radiation curing treatment is further carried out; wherein the energy density of the infrared radiation curing treatment is 150-1000cal/cm2And the irradiation duration is 30s-90 s.
The first isolation coating liquid is cured through the infrared radiation curing treatment which meets the parameters, so that the uniformity and the rapid curing of the first isolation layer can be ensured, and the gap is prevented from being generated in the first isolation layer.
Preferably, in the raw paper layer, the raw paper fiber layer with the composite structure is formed by sequentially overlapping a plurality of raw paper fiber films; wherein the content of the first and second substances,
of the plurality of base paper fiber films, base paper fiber films located at the bottommost surface and the topmost surface have the same first thickness, and the other base paper fiber films located in the middle have the same second thickness, and the first thickness is greater than the second thickness.
The base paper fiber layer with the composite structure is formed by sequentially overlapping a plurality of base paper fiber films, so that the toughness and the tear resistance of the base paper fiber layer can be effectively improved, and the base paper fiber films positioned at the bottommost surface and the topmost surface have larger thickness so as to avoid the base paper fiber layer from warping and deforming.
Preferably, in the thermosensitive color developing layer, the thermosensitive color developing coating is prepared by mixing an organic solvent, thermosensitive color changing particles, a dispersant, a developer and an antioxidant in a ratio of 50 to 80: 15-30: 1-5: 1-8: 0.5-3 by weight ratio;
the heat-sensitive color developing coating is formed by uniformly mixing the organic solvent, the heat-sensitive color changing particles, the dispersing agent, the color developing agent and the antioxidant at the temperature of 20-30 ℃.
The thermosensitive color developing coating obtained by mixing the components according to the weight ratio and the temperature condition can improve the thermosensitive color developing response and the durability of the thermosensitive color developing layer to the maximum extent.
Preferably, in the second separator, the second separator coating liquid is a mixture of an acrylic latex, titanium dioxide particles, precipitated calcium carbonate, a crosslinking agent and water in a ratio of 15 to 25: 0.5-1.5: 1.5-2: 0.1-0.3: 40-55 weight ratio;
the second isolation coating liquid is formed by mixing under the temperature condition of 20-35 ℃.
The second barrier coating liquid formed by the above components, weight ratio and temperature conditions has good coating film formability and ethanol barrier properties.
Preferably, after the second isolation coating liquid is coated on the back glue layer, infrared radiation curing treatment is further carried out; wherein the energy density of the infrared radiation curing treatment is 150-1000cal/cm2And the irradiation duration is 30s-90 s.
The infrared radiation curing treatment which meets the parameters can cure the second isolation coating liquid, so that the uniformity and the rapid curing of the second isolation layer can be ensured, and the generation of gaps inside the second isolation layer can be avoided.
Preferably, the water-washed polyester sol of the organosolv-resist gel coating is a water-washed uv-resistant silicone oil polyester sol.
The organic solvent glue resistant coating formed by the water-washed ultraviolet-resistant silicone oil polyester sol can effectively prevent ethanol from permeating into the thermosensitive paper and prolong the service life of the thermosensitive paper.
Preferably, the step of coating the second isolation coating liquid with the opposite polarity to the ethanol on the thermosensitive color developing layer to form the second isolation layer specifically comprises the steps of acquiring the fluid structure plane information of the second isolation coating liquid with the opposite polarity according to the ethanol molecule basic information corresponding to the ethanol, so as to construct a reticular ethanol data structure model, and then determining whether to execute the operation of the second isolation coating liquid according to the ethanol molecule interception effect of the reticular ethanol data structure model, wherein the specific process is that,
step S1, according to the ethanol molecular structure, obtaining the chemical bond structure basic information M (C, H, M) corresponding to the carbon atom and the hydrogen atom of the ethanol molecule in the ethanol solution with different concentrations through the following formula (1)0)
In the above formula (1), n is the ethanol concentration of the ethanol solution saturated at room temperature, C is the carbon number of ethanol, H is the hydrogen number of ethanol, and M is0The chemical bond structure information of the ethanol molecules, x is the mass percent of carbon atoms of ethanol solutions with different concentrations, y is the mass percent of hydrogen atoms of the ethanol solutions with different concentrations, and α is the chemical bond structure quantity of the ethanol solutions with different concentrations;
step S2, according to the basic information M (C, H, M) of chemical bond structure0) And fluid structure plane information F (a, r) of the second barrier coating liquid of the opposite polarity is obtained by the following formula (2)i)
In the above formula (2), e is a natural constant, ln is a logarithmic function based on the natural constant e, ξ is a barrier ratio of the second barrier coating liquid of opposite polarity to the ethanol molecule, and a is 1cm2Cumulative gap area per unit area of fluid structure corresponding to the second isolation coating liquid of opposite polarity, i being the number of molecules of opposite polarity in the second isolation coating liquid of opposite polarity, riIs a value of an inter-molecular distance of reversed polarity corresponding to the number of the reversed polarity molecules in the second isolation coating liquid of reversed polarity is i, (a) is structural information of the reversed polarity molecules in the second isolation coating liquid of reversed polarity;
step S3, according to the fluid structure plane information F (a, r) of the second isolation coating liquid with opposite polarityi) And performing superposition iteration processing by the following formula (3) to construct a reticular ethanol data structure model, and determining whether to execute the operation of a second isolation coating liquid according to the ethanol molecule interception effect of the reticular ethanol data structure model
In the above formula (3), exp is an exponential function with a natural constant e as a base, d is a gap difference between the second isolation layer and the organic solvent resistant glue coating layer, W is a cumulative gap area of the fluid structure corresponding to the second isolation coating liquid of opposite polarity, η is a barrier ratio of the reticular ethanol-proof structure molecular material, W (η) is a minimum cumulative gap area value corresponding to the reticular ethanol data structure model, and when the value of W (η) approaches 1, it indicates that the current reticular ethanol data structure model has a good ethanol molecule interception effect, and determines to perform the operation of the second isolation coating liquid.
The implementation process of coating the second isolation coating liquid with the opposite polarity to the ethanol on the thermosensitive color developing layer to form the second isolation layer can provide a permeation resistant barrier layer specially aiming at the ethanol, and the construction of the reticular ethanol data structure model enables the thermosensitive paper to effectively prevent the ethanol from permeating into the thermosensitive color developing layer in the ethanol application occasion, thereby avoiding the color development degradation of the thermosensitive color developing layer, improving the retention rate and the ethanol prevention performance of the thermosensitive paper and prolonging the service life of the thermosensitive paper.
The second isolation layer is formed by coating a second isolation coating liquid with opposite polarity to ethanol on the thermosensitive color development layer.
The embodiment of the invention also provides a method for manufacturing the thermal sensitive paper with high retention rate and ethanol resistance, which comprises the following steps:
step S1, forming a back glue layer by using a polyester resin material with a composite structure;
step S2, applying a first isolation coating liquid having an opposite polarity to ethanol on the back adhesive layer to form a first isolation layer;
step S3, adhering a base paper fiber layer with a composite structure on the first isolation layer to form a base paper layer;
step S4, coating the heat-sensitive color developing coating on the raw paper layer to form a heat-sensitive color developing layer;
step S5, coating the second isolation coating liquid with the opposite polarity to the ethanol on the heat-sensitive color development layer to form a second isolation layer, which specifically comprises the steps of obtaining the fluid structure plane information of the second isolation coating liquid with the opposite polarity according to the ethanol molecule basic information corresponding to the ethanol, constructing a reticular ethanol data structure model, determining whether to execute the operation of the second isolation coating liquid according to the ethanol molecule interception effect of the reticular ethanol data structure model, wherein the specific process is as follows,
step S501, according to the ethanol molecular structure, obtaining the chemical bond structure basic information M (C, H, M) corresponding to the carbon atom and the hydrogen atom of the ethanol molecule in the ethanol solution with different concentrations through the following formula (1)0)
In the above formula (1), n is the ethanol concentration of the ethanol solution saturated at room temperature, C is the carbon number of ethanol, H is the hydrogen number of ethanol, and M is0The chemical bond structure information of the ethanol molecules, x is the mass percent of carbon atoms of ethanol solutions with different concentrations, y is the mass percent of hydrogen atoms of the ethanol solutions with different concentrations, and α is the chemical bond structure quantity of the ethanol solutions with different concentrations;
step S502, according to the basic information M (C, H, M) of the chemical bond structure0) And fluid structure plane information F (a, r) of the second barrier coating liquid of the opposite polarity is obtained by the following formula (2)i)
In the above formula (2), e is a natural constant, ln is a logarithmic function based on the natural constant e, ξ is a barrier ratio of the second barrier coating liquid of opposite polarity to the ethanol molecule, and a is 1cm2Cumulative gap area per unit area of fluid structure corresponding to the second isolation coating liquid of opposite polarity, i being the number of molecules of opposite polarity in the second isolation coating liquid of opposite polarity, riIs a value of an inter-molecular distance of reversed polarity corresponding to the number of the reversed polarity molecules in the second isolation coating liquid of reversed polarity is i, (a) is structural information of the reversed polarity molecules in the second isolation coating liquid of reversed polarity;
step S503, coating according to the second isolation coating with opposite polarityFluid structure plane information F (a, r) of liquidi) And performing superposition iteration processing by the following formula (3) to construct a reticular ethanol data structure model, and determining whether to execute the operation of a second isolation coating liquid according to the ethanol molecule interception effect of the reticular ethanol data structure model
In the above formula (3), exp is an exponential function with a natural constant e as a base, d is a gap difference between the second isolation layer and the organic solvent resistant glue coating, W is a cumulative gap area of a fluid structure corresponding to the second isolation coating liquid with opposite polarity, η is a barrier ratio of the reticular ethanol-proof structure molecular material, W (η) is a minimum cumulative gap area value corresponding to the reticular ethanol data structure model, and when the value of W (η) approaches to 1, it indicates that the current reticular ethanol data structure model has a good ethanol molecule interception effect, and determines to perform the operation of the second isolation coating liquid;
and step S6, coating the water-washed polyester sol on the second isolation layer to form an organic solvent glue resistant coating.
From the content of the above embodiments, the thermal sensitive paper with high retention rate and ethanol resistance is formed by laminating a back adhesive layer, a first isolating layer, a raw paper layer, a thermal sensitive color developing layer, a second isolating layer and an organic solvent resistant adhesive coating layer from bottom to top, wherein the first isolating layer, the second isolating layer and the organic solvent resistant adhesive coating layer can provide a permeation resistant barrier layer for ethanol, so that when the thermal sensitive paper is applied to the occasions where ethanol exists, the ethanol can be effectively prevented from permeating into the thermal sensitive color developing layer, the condition of color development degradation of the thermal sensitive color developing layer is avoided, and the retention rate and the ethanol resistance of the thermal sensitive paper are improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The heat-sensitive paper with high retention rate and ethanol resistance is characterized in that:
the thermal sensitive paper with high retention rate and ethanol resistance comprises a back glue layer, a first isolation layer, a raw paper layer, a thermal sensitive color development layer, a second isolation layer and an organic solvent resistant glue coating which are sequentially laminated from bottom to top; wherein the content of the first and second substances,
the back glue layer is formed by a polyester resin material with a composite structure;
the first isolation layer is formed by coating a first isolation coating liquid with opposite polarity to ethanol on the back glue layer;
the raw paper layer is formed by bonding a raw paper fiber layer with a composite structure on the first isolating layer;
the thermosensitive color development layer is formed by coating thermosensitive color development paint on the raw paper layer;
the second isolation layer is formed by coating a second isolation coating liquid with opposite polarity to ethanol on the thermosensitive color development layer;
the organic solvent glue resistant coating is formed by coating a water-washed polyester sol on the second isolation layer.
2. The thermal paper having high retention and anti-ethanol properties according to claim 1, wherein: in the back adhesive layer, the polyester resin material with the composite structure comprises a first polyester resin layer with a first thickness and a second polyester resin layer with a second thickness; wherein the content of the first and second substances,
the first thickness is greater than the second thickness;
the hardness of the polyester resin adopted by the first polyester resin layer is greater than that of the polyester resin adopted by the second polyester resin layer.
3. The thermal paper having high retention and anti-ethanol properties according to claim 2, wherein: the first polyester resin layer and the second polyester resin layer jointly form the back glue layer in a laminating manner or a co-extrusion manner;
the polyester resin adopted by the first polyester resin layer and the polyester resin adopted by the second polyester resin layer have the characteristic of being mutually insoluble.
4. The thermal paper having high retention and anti-ethanol properties according to claim 1, wherein: in the first separator, the first separator coating liquid is prepared from acrylic latex, titanium dioxide particles, light calcium carbonate, a crosslinking agent and water according to a weight ratio of 15-25: 0.5-1.5: 1.5-2: 0.1-0.3: 40-55 weight ratio;
the first isolation coating liquid is formed by mixing at the temperature of 20-35 ℃.
5. The thermal paper having high retention and anti-ethanol properties according to claim 4, wherein: after the first isolation coating liquid is coated on the back glue layer, infrared radiation curing treatment is also carried out; wherein the energy density of the infrared radiation curing treatment is 150-1000cal/cm2And the irradiation duration is 30s-90 s.
6. The thermal paper having high retention and anti-ethanol properties according to claim 1, wherein: in the raw paper layer, the raw paper fiber layer with the composite structure is formed by sequentially overlapping a plurality of raw paper fiber films; wherein the content of the first and second substances,
among the plurality of base paper fiber films, base paper fiber films located at the bottommost surface and the topmost surface have the same first thickness, while other base paper fiber films located in the middle have the same second thickness, and the first thickness is greater than the second thickness;
alternatively, the first and second electrodes may be,
in the thermosensitive color developing layer, the thermosensitive color developing coating is prepared by mixing an organic solvent, thermosensitive color changing particles, a dispersant, a developer and an antioxidant in a ratio of 50-80: 15-30: 1-5: 1-8: 0.5-3 by weight ratio;
the heat-sensitive color-developing coating is formed by uniformly mixing the organic solvent, the heat-sensitive color-developing particles, the dispersing agent, the color-developing agent and the antioxidant at the temperature of 20-30 ℃.
7. The thermal paper having high retention and anti-ethanol properties according to claim 1, wherein: in the second separator, the second separator coating liquid is prepared from acrylic latex, titanium dioxide particles, light calcium carbonate, a crosslinking agent and water according to a weight ratio of 15-25: 0.5-1.5: 1.5-2: 0.1-0.3: 40-55 weight ratio;
the second isolation coating liquid is formed by mixing under the temperature condition of 20-35 ℃.
8. The thermal paper having high retention and anti-ethanol properties according to claim 7, wherein: after the second isolation coating liquid is coated on the back glue layer, infrared radiation curing treatment is also carried out;
wherein the energy density of the infrared radiation curing treatment is 150-1000cal/cm2And the irradiation duration is 30s-90 s;
alternatively, the first and second electrodes may be,
the water-washed polyester sol of the organic solvent glue resistant coating is water-washed ultraviolet resistant silicone oil polyester sol.
9. The thermal paper having high retention and anti-ethanol properties according to claim 1, wherein: coating a second isolation coating liquid with opposite polarity to ethanol on the thermosensitive color development layer to form a second isolation layer specifically comprises the steps of obtaining fluid structure plane information of the second isolation coating liquid with opposite polarity according to ethanol molecule basic information corresponding to the ethanol, constructing a reticular ethanol data structure model according to the fluid structure plane information, determining whether to execute the operation of the second isolation coating liquid according to the ethanol molecule interception effect of the reticular ethanol data structure model, and specifically comprising the steps of,
step S1, according to the molecular structure of ethanol, obtaining the carbon atom and hydrogen atom pairs of ethanol molecules in ethanol solution with different concentrations through the following formula (1)Corresponding chemical bond structural basic information M (C, H, M)0)
In the above formula (1), n is the ethanol concentration of the ethanol solution saturated at room temperature, C is the carbon number of ethanol, H is the hydrogen number of ethanol, and M is0The chemical bond structure information of the ethanol molecules, x is the mass percent of carbon atoms of ethanol solutions with different concentrations, y is the mass percent of hydrogen atoms of the ethanol solutions with different concentrations, and α is the chemical bond structure quantity of the ethanol solutions with different concentrations;
step S2, according to the basic information M (C, H, M) of the chemical bond structure0) And acquiring fluid structure plane information F (a, r) of the second barrier coating liquid of the opposite polarity by the following formula (2)i)
In the above formula (2), e is a natural constant, ln is a logarithmic function based on the natural constant e, ξ is a barrier ratio of the second barrier coating liquid of opposite polarity to the ethanol molecule, and a is 1cm2Cumulative gap area per unit area of fluid structure corresponding to the second isolation coating liquid of opposite polarity, i being the number of molecules of opposite polarity in the second isolation coating liquid of opposite polarity, riIs a value of an inter-molecular distance of reversed polarity corresponding to the number of the reversed polarity molecules in the second isolation coating liquid of reversed polarity is i, (a) is structural information of the reversed polarity molecules in the second isolation coating liquid of reversed polarity;
step S3, according to the fluid structure plane information F (a, r) of the second isolation coating liquid with opposite polarityi) And performing superposition iteration processing by the following formula (3) to construct a reticular ethanol data structure model, and determining whether to execute the operation of a second isolation coating liquid according to the ethanol molecule interception effect of the reticular ethanol data structure model
In the above formula (3), exp is an exponential function with a natural constant e as a base, d is a gap difference between the second isolation layer and the organic solvent resistant glue coating layer, W is a cumulative gap area of the fluid structure corresponding to the second isolation coating liquid of opposite polarity, η is a barrier ratio of the reticular ethanol-proof structure molecular material, W (η) is a minimum cumulative gap area value corresponding to the reticular ethanol data structure model, and when the value of W (η) approaches 1, it indicates that the current reticular ethanol data structure model has a good ethanol molecule interception effect, and determines to perform the operation of the second isolation coating liquid.
10. A method for manufacturing the thermal paper with high retention rate and ethanol-proof performance as claimed in claim 1, wherein the method for manufacturing the thermal paper with high retention rate and ethanol-proof performance comprises the following steps:
step S1, forming a back glue layer by using a polyester resin material with a composite structure;
step S2, coating a first isolation coating liquid with the opposite polarity to the ethanol on the back glue layer to form a first isolation layer;
step S3, adhering a base paper fiber layer with a composite structure on the first isolation layer to form a base paper layer;
step S4, coating the thermosensitive color developing coating on the raw paper layer to form a thermosensitive color developing layer;
step S5, coating the second isolation coating liquid with the opposite polarity to the ethanol on the heat-sensitive color development layer to form a second isolation layer, specifically including obtaining the fluid structure plane information of the second isolation coating liquid with the opposite polarity according to the ethanol molecule basic information corresponding to the ethanol, so as to construct a reticular ethanol data structure model, and then determining whether to execute the operation of the second isolation coating liquid according to the ethanol molecule interception effect of the reticular ethanol data structure model, wherein the specific process is that,
step S501, according to the molecular structure of ethanol, different concentrations are obtained through the following formula (1)Chemical bond structure basic information M (C, H, M) corresponding to carbon atom and hydrogen atom of ethanol molecule in ethanol solution0)
In the above formula (1), n is the ethanol concentration of the ethanol solution saturated at room temperature, C is the carbon number of ethanol, H is the hydrogen number of ethanol, and M is0The chemical bond structure information of the ethanol molecules, x is the mass percent of carbon atoms of ethanol solutions with different concentrations, y is the mass percent of hydrogen atoms of the ethanol solutions with different concentrations, and α is the chemical bond structure quantity of the ethanol solutions with different concentrations;
step S502, according to the basic information M (C, H, M) of the chemical bond structure0) And acquiring fluid structure plane information F (a, r) of the second barrier coating liquid of the opposite polarity by the following formula (2)i)
In the above formula (2), e is a natural constant, ln is a logarithmic function based on the natural constant e, ξ is a barrier ratio of the second barrier coating liquid of opposite polarity to the ethanol molecule, and a is 1cm2Cumulative gap area per unit area of fluid structure corresponding to the second isolation coating liquid of opposite polarity, i being the number of molecules of opposite polarity in the second isolation coating liquid of opposite polarity, riIs a value of an inter-molecular distance of reversed polarity corresponding to the number of the reversed polarity molecules in the second isolation coating liquid of reversed polarity is i, (a) is structural information of the reversed polarity molecules in the second isolation coating liquid of reversed polarity;
step S503, according to the fluid structure plane information F (a, r) of the second isolation coating liquid with opposite polarityi) And performing superposition iteration processing by the following formula (3) to construct a reticular ethanol data structure model, and determining whether to execute the operation of a second isolation coating liquid according to the ethanol molecule interception effect of the reticular ethanol data structure model
In the above formula (3), exp is an exponential function with a natural constant e as a base, d is a gap difference between the second isolation layer and the organic solvent resistant glue coating, W is a cumulative gap area of a fluid structure corresponding to the second isolation coating liquid with opposite polarity, η is a barrier ratio of the reticular ethanol-proof structure molecular material, W (η) is a minimum cumulative gap area value corresponding to the reticular ethanol data structure model, and when the value of W (η) approaches to 1, it indicates that the current reticular ethanol data structure model has a good ethanol molecule interception effect, and determines to perform the operation of the second isolation coating liquid;
and step S6, coating the water-washed polyester sol on the second isolation layer to form an organic solvent glue resistant coating.
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| CN201072619Y (en) * | 2007-07-24 | 2008-06-11 | 深圳市摩码科技有限公司 | Spirit-resistant heat sensitive material label |
| EP2329959A1 (en) * | 2009-12-01 | 2011-06-08 | Mitsubishi HiTec Paper Flensburg GmbH | Heat-sensitive recording material with barrier coating |
| CN104060494A (en) * | 2014-05-09 | 2014-09-24 | 湖南恒瀚高新技术有限公司 | Multi-proof thermosensitive paper free of top coating and manufacture process thereof |
| CN106894286A (en) * | 2017-02-13 | 2017-06-27 | 上海固尔建工贸有限公司 | A kind of anti-ethanol heat-sensitive paper for possessing retention rate high |
| CN111098618A (en) * | 2020-01-16 | 2020-05-05 | 南阳柯丽尔科技有限公司 | Thermosensitive film and preparation method thereof |
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2020
- 2020-05-26 CN CN202010454816.7A patent/CN111778773A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201072619Y (en) * | 2007-07-24 | 2008-06-11 | 深圳市摩码科技有限公司 | Spirit-resistant heat sensitive material label |
| EP2329959A1 (en) * | 2009-12-01 | 2011-06-08 | Mitsubishi HiTec Paper Flensburg GmbH | Heat-sensitive recording material with barrier coating |
| CN104060494A (en) * | 2014-05-09 | 2014-09-24 | 湖南恒瀚高新技术有限公司 | Multi-proof thermosensitive paper free of top coating and manufacture process thereof |
| CN106894286A (en) * | 2017-02-13 | 2017-06-27 | 上海固尔建工贸有限公司 | A kind of anti-ethanol heat-sensitive paper for possessing retention rate high |
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