阅读说明：本技术 用于防伪票据的防伪热敏纸及其制作方法 (Anti-counterfeiting thermal sensitive paper for anti-counterfeiting bills and manufacturing method thereof ) 是由 罗耀东 于 2020-05-26 设计创作，主要内容包括：本发明提供了用于防伪票据的防伪热敏纸及其制作方法,该用于防伪票据的防伪热敏纸通过将基底层、票据信息层、第一隔离层、热敏显色层、第二隔离层、防伪信息层和封装层由下至上依次层叠设置,其中该票据信息层用于呈现相应的票据信息以此保证该热敏纸能够直接应用于票据印刷记录的场合,并且该防伪信息层还通过相应的防伪油墨图文或者防伪微结构来承载相应的防伪信息,以保证该热敏纸进行热敏信息显示的信息安全性,并且该防伪信息层是夹设在该热敏纸的内部,这能够有效地避免该防伪信息层受到变更或者破坏,从而提高该防伪热敏纸对不同场合的适用性和延长其使用寿命。(The invention provides anti-counterfeiting thermal sensitive paper for anti-counterfeiting bills and a manufacturing method thereof, the anti-counterfeiting thermal sensitive paper for the anti-counterfeiting bills is formed by sequentially laminating a substrate layer, a bill information layer, a first isolating layer, a thermal sensitive color development layer, a second isolating layer, an anti-counterfeiting information layer and a packaging layer from bottom to top, wherein the bill information layer is used for presenting corresponding bill information so as to ensure that the thermal sensitive paper can be directly applied to the occasion of bill printing record, and the anti-counterfeiting information layer also bears corresponding anti-counterfeiting information through corresponding anti-counterfeiting ink pictures and texts or anti-counterfeiting microstructures so as to ensure the information security of thermosensitive information display of the thermosensitive paper, and the anti-counterfeiting information layer is clamped in the thermal sensitive paper, so that the anti-counterfeiting information layer can be effectively prevented from being changed or damaged, the applicability of the anti-counterfeiting thermal sensitive paper to different occasions is improved, and the service life of the anti-counterfeiting thermal sensitive paper is prolonged.)

1. The anti-counterfeiting thermal paper for the anti-counterfeiting bill is characterized in that:

the anti-counterfeiting thermal paper for the anti-counterfeiting bill comprises a substrate layer, a bill information layer, a first isolation layer, a thermal-sensitive color development layer, a second isolation layer, an anti-counterfeiting information layer and a packaging layer which are sequentially stacked from bottom to top; wherein the content of the first and second substances,

the base layer is a base paper fiber layer with a multi-layer composite structure;

the bill information layer is a relief structure layer which is arranged on the upper surface of the substrate layer and is used for presenting corresponding bill information;

the first isolation layer is a polyester material layer arranged on the upper surface of the bill information layer;

the heat-sensitive color development layer is formed by coating heat-sensitive color development coating on the first separation layer;

the second isolation layer is a polyester material layer arranged on the upper surface of the thermosensitive color development layer;

the anti-counterfeiting information layer is an anti-counterfeiting ink picture and text or an anti-counterfeiting microstructure arranged on the upper surface of the second isolation layer;

the packaging layer is a polyester material layer arranged on the upper surface of the anti-counterfeiting information layer.

2. A security thermal paper for a security document as claimed in claim 1 wherein:

in the substrate layer, the base paper fiber layer of the multilayer composite structure is formed by sequentially overlapping a plurality of base paper fiber laminating units; wherein the content of the first and second substances,

each of the base paper fiber lamination units includes a first paper fiber film having a first thickness and a second paper fiber film having a second thickness;

the second paper fiber film is arranged above the first paper fiber film in a pressing mode, and the first thickness is larger than the second thickness.

3. A security thermal paper for a security document as claimed in claim 1 wherein:

the ticket information layer is formed by the following process,

the method comprises the following steps that a layer of photosensitive glue is coated on at least a partial area corresponding to the upper surface of a substrate layer;

a second procedure, according to the presentation mode of the preset bill information, carrying out light radiation treatment on the photosensitive adhesive so as to form a relief structure corresponding to the preset bill information;

and a third step of forming the bill information layer by performing a development process and a curing process on the relief structure.

4. A security thermal paper for a security document as claimed in claim 3 wherein:

in the first procedure, the photosensitive glue is coated on the peripheral edge area of the upper surface of the substrate layer, and the coating area corresponding to the photosensitive glue is not more than 50% of the total area of the substrate layer;

alternatively, the first and second electrodes may be,

in the second process, the light radiation energy density of the light radiation treatment on the photosensitive adhesive is 50-150cal/cm2, and the duration time of the light radiation treatment is 5-20 s.

5. A security thermal paper for a security document as claimed in claim 1 wherein:

in the first isolation layer, the thickness of the polyester material layer is not less than the maximum concave depth of the relief structure existing in the bill information layer;

the glass transition temperature of the polyester material adopted by the polyester material layer is not lower than 150 ℃.

6. A security thermal paper for a security document as claimed in claim 1 wherein:

in the heat-sensitive color developing layer, the heat-sensitive color developing coating is prepared by mixing an organic solvent, heat-sensitive color developing particles, a dispersant, a developer, a stabilizer and an antioxidant according to a weight ratio of 35-65: 15-25: 1-3: 1-3: 0.5-: 0.5-1 weight ratio under the temperature condition of 20-30 ℃.

7. A security thermal paper for a security document as claimed in claim 1 wherein:

in the second isolation layer, the polyester material layer is made of a transparent polyester material, and the thickness of the polyester material layer is smaller than that of the thermosensitive color development layer;

the glass transition temperature of the polyester material adopted by the polyester material layer is not lower than 150 ℃;

alternatively, the first and second electrodes may be,

in the anti-counterfeiting information layer, the anti-counterfeiting information layer is provided with a first anti-counterfeiting mark and a second anti-counterfeiting mark,

when the anti-counterfeiting ink image-text is arranged on the upper surface of the second isolation layer, the anti-counterfeiting ink image-text is holographic anti-counterfeiting color ink image-text or holographic anti-counterfeiting black-white ink image-text;

when the upper surface of the second isolation layer is an anti-counterfeiting microstructure, the anti-counterfeiting microstructure is an anti-counterfeiting grating microstructure or an anti-counterfeiting lens array microstructure, wherein the anti-counterfeiting grating microstructure is a one-dimensional anti-counterfeiting grating microstructure or a two-dimensional anti-counterfeiting grating microstructure.

8. A security thermal paper for a security document as claimed in claim 7 wherein:

when the anti-counterfeiting ink graph-text is arranged on the upper surface of the second isolation layer, the thickness of the anti-counterfeiting information layer is 1000-1500 μm;

alternatively, the first and second electrodes may be,

when the anti-counterfeiting microstructure is arranged on the upper surface of the second isolation layer, the thickness of the anti-counterfeiting information layer is 1200-1800 μm;

alternatively, the first and second electrodes may be,

the packaging layer comprises an anti-grease sublayer and an anti-scratch sublayer which are sequentially stacked from bottom to top; the anti-grease sublayer is directly arranged on the upper surface of the anti-counterfeiting information layer, and the scratch resistant sublayer is directly arranged on the upper surface of the anti-grease sublayer;

the thickness of the grease-resistant sublayer is equal to or less than that of the scratch-resistant sublayer.

9. A security thermal paper for a security document as claimed in claim 1 wherein:

the method for forming the anti-counterfeiting information layer by arranging the anti-counterfeiting ink image-text on the upper surface of the second isolation layer comprises the steps of converting the anti-counterfeiting ink image-text into a square pattern, calculating the information of each pixel point corresponding to the square pattern, and arranging the anti-counterfeiting ink image-text on the upper surface of the second isolation layer according to the information of each pixel point,

step S1, processing the anti-counterfeiting ink image-text to convert the anti-counterfeiting ink image-text into a square pattern with length and width of m, which comprises the following steps,

step S101, obtaining the image-text size of the anti-counterfeiting ink image-text, respectively setting the length and the width of the image-text size as l and w, selecting a smaller value of the image-text size as a standard value m and a larger value as a target adjustment value n, and adjusting by taking the length or the width corresponding to the target adjustment value as an adjustment direction;

step S102, according to the following formula (2), adjusting the redundant information in the adjusting direction

In the formula (2), s is redundant graphic and text information, double is a double-precision floating point number, mid is a middle transition parameter, and f is a set of positions corresponding to the redundant graphic and text information in the adjustment direction;

s103, compressing the redundant image-text information in equal proportion to convert the size of the adjustment direction of the redundant image-text information into a standard value m, so that the anti-counterfeiting ink image-text is converted into a square pattern with the length and the width of m;

step S2, calculating and acquiring information of each pixel point of the square pattern by the following formula (3)

In the above equation (3), P i, j is the pixel value of the point with coordinates i, j in the square pattern, mid i (i +1) is the pixel value of the point with coordinates i,0 in the square pattern, mid (j (j +1)) is the pixel value of the point with coordinates j,0 in the positive direction pattern,the value of m and np is the rest, i is 1, 2, 3, … … m, j is 1, 2, 3, … … m;

step S3, generating two-dimensional code information about the square pattern according to the pixel point information, wherein the size of the two-dimensional code is d x d;

step S4, calculating a pixel value corresponding to the two-dimensional code information by the following formula (4)

In the above formula (4), EP (i, j) is a pixel value of a point having coordinates i, j in the image information corresponding to the two-dimensional code information, EP i + i1, j + j1 is a pixel value of a point having coordinates i + i1, j + j1 in the image information corresponding to the two-dimensional code information, and EPi + i2, j + j2 is a pixel value of a point having coordinates i + i2, j + j2 in the image information corresponding to the two-dimensional code information;

and step S5, configuring the pixel values of all coordinate points in the image information corresponding to the two-dimensional code information into image information of the two-dimensional code information according to the calculation result of the step S4, and performing an operation of setting anti-counterfeiting ink graphics on the upper surface of the second isolation layer according to the image information.

10. A method for manufacturing the anti-counterfeiting thermal paper for the anti-counterfeiting bill according to claim 1, wherein the method for manufacturing the anti-counterfeiting thermal paper for the anti-counterfeiting bill comprises the following steps:

step S1, manufacturing a base paper fiber layer with a multi-layer composite structure, thereby forming a base layer;

step S2, arranging a relief structure layer used for presenting corresponding bill information on the upper surface of the substrate layer, thereby forming a bill information layer;

step S3, forming a first isolation layer on the polyester material layer on the upper surface of the bill information layer;

step S4 of applying a thermosensitive color-developing coating to the first partition layer to form a thermosensitive color-developing layer;

step S5, arranging a polyester material layer on the upper surface of the thermosensitive color-developing layer so as to form a second isolation layer;

step S6, arranging anti-counterfeiting ink images and texts or anti-counterfeiting microstructures on the upper surface of the second isolation layer to form an anti-counterfeiting information layer, wherein the step of arranging anti-counterfeiting ink images and texts on the upper surface of the second isolation layer to form the anti-counterfeiting information layer is to convert the anti-counterfeiting ink images and texts into square patterns, calculate the pixel point information corresponding to the square patterns, and then carry out the operation of arranging anti-counterfeiting ink images and texts on the upper surface of the second isolation layer according to the pixel point information, and the specific process comprises the following steps,

step S601, the anti-counterfeiting ink image-text is processed to convert the anti-counterfeiting ink image-text into a square pattern with length and width of m, the specific steps are as follows,

step S6011, obtaining the image-text size of the anti-counterfeiting ink image-text, setting the length and the width of the image-text size to l and w respectively, selecting a smaller value of the image-text size as a standard value m and a larger value as a target adjustment value n, and adjusting by taking the length or the width corresponding to the target adjustment value as an adjustment direction;

step S6012, according to the following formula (2), adjusting the redundant information in the adjustment direction

In the formula (2), s is redundant graphic and text information, double is a double-precision floating point number, mid is a middle transition parameter, and f is a set of positions corresponding to the redundant graphic and text information in the adjustment direction;

s6013, compressing the redundant image-text information in equal proportion to convert the size of the adjustment direction of the redundant image-text information into a standard value m, so that the anti-counterfeiting ink image-text is converted into a square pattern with the length and the width of m;

step S602, calculating and obtaining the information of each pixel point of the square pattern by the following formula (3)

In the above equation (3), P i, j is the pixel value of the point with coordinates i, j in the square pattern, mid i (i +1) is the pixel value of the point with coordinates i,0 in the square pattern, mid (j (j +1)) is the pixel value of the point with coordinates j,0 in the positive direction pattern,

step S603, generating two-dimensional code information about the square pattern according to the pixel point information, wherein the size of the two-dimensional code is d x d;

step S604, calculating a pixel value corresponding to the two-dimensional code information according to the following formula (4)

In the above formula (4), EP (i, j) is a pixel value of a point having coordinates i, j in the image information corresponding to the two-dimensional code information, EP i + i1, j + j1 is a pixel value of a point having coordinates i + i1, j + j1 in the image information corresponding to the two-dimensional code information, and EPi + i2, j + j2 is a pixel value of a point having coordinates i + i2, j + j2 in the image information corresponding to the two-dimensional code information;

step S5, according to the calculation result of step S4, configuring the pixel values of all coordinate points in the image information corresponding to the two-dimensional code information into the image information of the two-dimensional code information, and according to the image information, performing an operation of setting an anti-counterfeiting ink image-text on the upper surface of the second isolation layer;

step S6, arranging a polyester material layer on the upper surface of the anti-counterfeiting information layer, thereby forming an encapsulation layer.

Technical Field

The invention relates to the technical field of thermal paper, in particular to anti-counterfeiting thermal paper for anti-counterfeiting bills 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 heat-sensitive paper has wide application, and can be applied to different occasions such as bills, labels and the like. When the thermal sensitive paper is applied to bills, due to the particularity of the bills, not only the thermal sensitive color development definition and the durability of the thermal sensitive paper need to be considered, but also whether the thermal sensitive paper has the anti-counterfeiting characteristic or not needs to be considered, and if the thermal sensitive paper does not have the anti-counterfeiting characteristic or the anti-counterfeiting characteristic is low, the bills are easily forged, so that the information security of the bills is threatened. Therefore, the anti-counterfeiting thermal paper which can be used for anti-counterfeiting bills is urgently needed in the prior art, so that the information printing convenience and the information safety of the bills are improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the anti-counterfeiting thermal paper for the anti-counterfeiting bill, the anti-counterfeiting thermal paper for the anti-counterfeiting bill is formed by sequentially laminating a substrate layer, a bill information layer, a first isolating layer, a thermal-sensitive color development layer, a second isolating layer, an anti-counterfeiting information layer and a packaging layer from bottom to top, wherein the bill information layer is used for presenting corresponding bill information so as to ensure that the thermal sensitive paper can be directly applied to the occasion of bill printing record, and the anti-counterfeiting information layer also bears corresponding anti-counterfeiting information through corresponding anti-counterfeiting ink pictures and texts or anti-counterfeiting microstructures so as to ensure the information security of thermosensitive information display of the thermosensitive paper, and the anti-counterfeiting information layer is clamped in the thermal sensitive paper, so that the anti-counterfeiting information layer can be effectively prevented from being changed or damaged, the applicability of the anti-counterfeiting thermal sensitive paper to different occasions is improved, and the service life of the anti-counterfeiting thermal sensitive paper is prolonged.

The invention provides anti-counterfeiting thermal paper for anti-counterfeiting bills, which is characterized in that:

the anti-counterfeiting thermal paper for the anti-counterfeiting bill comprises a substrate layer, a bill information layer, a first isolation layer, a thermal-sensitive color development layer, a second isolation layer, an anti-counterfeiting information layer and a packaging layer which are sequentially stacked from bottom to top; wherein the content of the first and second substances,

the base layer is a base paper fiber layer with a multi-layer composite structure;

the bill information layer is a relief structure layer which is arranged on the upper surface of the substrate layer and is used for presenting corresponding bill information;

the first isolation layer is a polyester material layer arranged on the upper surface of the bill information layer;

the heat-sensitive color development layer is formed by coating heat-sensitive color development coating on the first separation layer;

the second isolation layer is a polyester material layer arranged on the upper surface of the thermosensitive color development layer;

the anti-counterfeiting information layer is an anti-counterfeiting ink picture and text or an anti-counterfeiting microstructure arranged on the upper surface of the second isolation layer;

the packaging layer is a polyester material layer arranged on the upper surface of the anti-counterfeiting information layer;

further, in the substrate layer, the base paper fiber layer of the multilayer composite structure is formed by sequentially stacking a plurality of base paper fiber stacking units; wherein the content of the first and second substances,

each of the base paper fiber lamination units includes a first paper fiber film having a first thickness and a second paper fiber film having a second thickness;

the second paper fiber film is arranged above the first paper fiber film in a pressing mode, and the first thickness is larger than the second thickness;

further, the bill information layer is formed by the following process,

the method comprises the following steps that a layer of photosensitive glue is coated on at least a partial area corresponding to the upper surface of a substrate layer;

a second procedure, according to the presentation mode of the preset bill information, carrying out light radiation treatment on the photosensitive adhesive so as to form a relief structure corresponding to the preset bill information;

a third step of forming the bill information layer by performing a development process and a curing process on the relief structure;

further, in the first procedure, the photosensitive glue is coated on the peripheral edge area of the upper surface of the substrate layer, and the coating area corresponding to the photosensitive glue is not more than 50% of the total area of the substrate layer;

alternatively, the first and second electrodes may be,

in the second process, the light radiation energy density of the light radiation treatment on the photosensitive adhesive is 50-150cal/cm2, and the duration time of the light radiation treatment is 5-20 s;

further, in the first isolation layer, the thickness of the polyester material layer is not less than the maximum concave depth of the relief structure existing in the bill information layer;

the glass transition temperature of the polyester material adopted by the polyester material layer is not lower than 150 ℃;

further, in the thermosensitive color developing layer, the thermosensitive color developing coating is prepared by mixing an organic solvent, thermosensitive color developing particles, a dispersant, a developer, a stabilizer and an antioxidant in a ratio of 35-65: 15-25: 1-3: 1-3: 0.5-: 0.5-1 weight ratio, and is formed by mixing under the temperature condition of 20-30 ℃;

further, in the second isolation layer, the polyester material layer is made of a transparent polyester material, and the thickness of the polyester material layer is smaller than that of the thermosensitive color development layer;

the glass transition temperature of the polyester material adopted by the polyester material layer is not lower than 150 ℃;

alternatively, the first and second electrodes may be,

in the anti-counterfeiting information layer, the anti-counterfeiting information layer is provided with a first anti-counterfeiting mark and a second anti-counterfeiting mark,

when the anti-counterfeiting ink image-text is arranged on the upper surface of the second isolation layer, the anti-counterfeiting ink image-text is holographic anti-counterfeiting color ink image-text or holographic anti-counterfeiting black-white ink image-text;

when the anti-counterfeiting microstructure is arranged on the upper surface of the second isolation layer, the anti-counterfeiting microstructure is an anti-counterfeiting grating microstructure or an anti-counterfeiting lens array microstructure, wherein the anti-counterfeiting grating microstructure is a one-dimensional anti-counterfeiting grating microstructure or a two-dimensional anti-counterfeiting grating microstructure;

further, when the anti-counterfeiting ink picture and text are arranged on the upper surface of the second isolation layer, the thickness of the anti-counterfeiting information layer is 1000-1500 μm;

alternatively, the first and second electrodes may be,

when the anti-counterfeiting microstructure is arranged on the upper surface of the second isolation layer, the thickness of the anti-counterfeiting information layer is 1200-1800 μm;

alternatively, the first and second electrodes may be,

the packaging layer comprises an anti-grease sublayer and an anti-scratch sublayer which are sequentially stacked from bottom to top; wherein the content of the first and second substances,

the anti-grease sublayer is directly arranged on the upper surface of the anti-counterfeiting information layer, and the scratch-resistant sublayer is directly arranged on the upper surface of the anti-grease sublayer;

the thickness of the grease-resistant sublayer is equal to or less than that of the scratch-resistant sublayer;

further, the step of arranging the anti-counterfeiting ink image and text on the upper surface of the second isolation layer to form the anti-counterfeiting information layer comprises the steps of converting the anti-counterfeiting ink image and text into a square pattern, calculating the information of each pixel point corresponding to the square pattern, and then executing the operation of arranging the anti-counterfeiting ink image and text on the upper surface of the second isolation layer according to the information of each pixel point,

step S1, processing the anti-counterfeiting ink image-text to convert the anti-counterfeiting ink image-text into a square pattern with length and width of m, which comprises the following steps,

step S101, obtaining the image-text size of the anti-counterfeiting ink image-text, respectively setting the length and the width of the image-text size as l and w, selecting a smaller value of the image-text size as a standard value m and a larger value as a target adjustment value n, and adjusting by taking the length or the width corresponding to the target adjustment value as an adjustment direction;

step S102, according to the following formula (2), adjusting the redundant information in the adjusting direction

In the formula (2), s is redundant graphic and text information, double is a double-precision floating point number, mid is a middle transition parameter, and f is a set of positions corresponding to the redundant graphic and text information in the adjustment direction;

s103, compressing the redundant image-text information in equal proportion to convert the size of the adjustment direction of the redundant image-text information into a standard value m, so that the anti-counterfeiting ink image-text is converted into a square pattern with the length and the width of m;

step S2, calculating and acquiring information of each pixel point of the square pattern by the following formula (3)

In the above equation (3), Pi, j is the pixel value of a point with coordinates i, j in the square pattern, mid i (i +1) is the pixel value of a point with coordinates i,0 in the square pattern, mid (j (j +1)) is the pixel value of a point with coordinates j,0 in the positive direction pattern,

the value of m and np is the rest, i is 1, 2, 3, … … m, j is 1, 2, 3, … … m;

step S3, generating two-dimensional code information about the square pattern according to the pixel point information, wherein the size of the two-dimensional code is d x d;

step S4, calculating a pixel value corresponding to the two-dimensional code information by the following formula (4)

In the above formula (4), EP (i, j) is a pixel value of a point having coordinates i, j in the image information corresponding to the two-dimensional code information, EP i + i1, j + j1 is a pixel value of a point having coordinates i + i1, j + j1 in the image information corresponding to the two-dimensional code information, and EP i + i2, j + j2 is a pixel value of a point having coordinates i + i2, j + j2 in the image information corresponding to the two-dimensional code information;

and step S5, configuring the pixel values of all coordinate points in the image information corresponding to the two-dimensional code information into image information of the two-dimensional code information according to the calculation result of the step S4, and performing an operation of setting anti-counterfeiting ink graphics on the upper surface of the second isolation layer according to the image information.

The invention also provides a method for manufacturing the anti-counterfeiting thermal paper for the anti-counterfeiting bill, which is characterized by comprising the following steps of:

step S1, manufacturing a base paper fiber layer with a multi-layer composite structure, thereby forming a base layer;

step S2, arranging a relief structure layer used for presenting corresponding bill information on the upper surface of the substrate layer, thereby forming a bill information layer;

step S3, forming a first isolation layer on the polyester material layer on the upper surface of the bill information layer;

step S4 of applying a thermosensitive color-developing coating to the first partition layer to form a thermosensitive color-developing layer;

step S5, arranging a polyester material layer on the upper surface of the thermosensitive color-developing layer so as to form a second isolation layer;

step S6, arranging anti-counterfeiting ink images and texts or anti-counterfeiting microstructures on the upper surface of the second isolation layer to form an anti-counterfeiting information layer, wherein the step of arranging anti-counterfeiting ink images and texts on the upper surface of the second isolation layer to form the anti-counterfeiting information layer is to convert the anti-counterfeiting ink images and texts into square patterns, calculate the pixel point information corresponding to the square patterns, and then carry out the operation of arranging anti-counterfeiting ink images and texts on the upper surface of the second isolation layer according to the pixel point information, and the specific process comprises the following steps,

step S601, the anti-counterfeiting ink image-text is processed to convert the anti-counterfeiting ink image-text into a square pattern with length and width of m, the specific steps are as follows,

step S6011, obtaining the image-text size of the anti-counterfeiting ink image-text, setting the length and the width of the image-text size to l and w respectively, selecting a smaller value of the image-text size as a standard value m and a larger value as a target adjustment value n, and adjusting by taking the length or the width corresponding to the target adjustment value as an adjustment direction;

step S6012, according to the following formula (2), adjusting the redundant information in the adjustment direction

In the formula (2), s is redundant graphic and text information, double is a double-precision floating point number, mid is a middle transition parameter, and f is a set of positions corresponding to the redundant graphic and text information in the adjustment direction;

s6013, compressing the redundant image-text information in equal proportion to convert the size of the adjustment direction of the redundant image-text information into a standard value m, so that the anti-counterfeiting ink image-text is converted into a square pattern with the length and the width of m;

step S602, calculating and obtaining the information of each pixel point of the square pattern by the following formula (3)

In the above equation (3), P i, j is the pixel value of the point with coordinates i, j in the square pattern, mid i (i +1) is the pixel value of the point with coordinates i,0 in the square pattern, mid (j (j +1)) is the pixel value of the point with coordinates j,0 in the positive direction pattern,the value of m and np is the rest, i is 1, 2, 3, … … m, j is 1, 2, 3, … … m;

step S603, generating two-dimensional code information about the square pattern according to the pixel point information, wherein the size of the two-dimensional code is d x d;

step S604, calculating a pixel value corresponding to the two-dimensional code information according to the following formula (4)

In the above formula (4), EP (i, j) is a pixel value of a point having coordinates i, j in the image information corresponding to the two-dimensional code information, EP i + i1, j + j1 is a pixel value of a point having coordinates i + i1, j + j1 in the image information corresponding to the two-dimensional code information, and EP i + i2, j + j2 is a pixel value of a point having coordinates i + i2, j + j2 in the image information corresponding to the two-dimensional code information;

step S5, according to the calculation result of step S4, configuring the pixel values of all coordinate points in the image information corresponding to the two-dimensional code information into the image information of the two-dimensional code information, and according to the image information, performing an operation of setting an anti-counterfeiting ink image-text on the upper surface of the second isolation layer;

step S6, arranging a polyester material layer on the upper surface of the anti-counterfeiting information layer, thereby forming an encapsulation layer.

Compared with the prior art, the anti-counterfeiting thermal sensitive paper for the anti-counterfeiting bill is formed by sequentially stacking the substrate layer, the bill information layer, the first isolation layer, the thermal color development layer, the second isolation layer, the anti-counterfeiting information layer and the packaging layer from bottom to top, wherein the bill information layer is used for presenting corresponding bill information so as to ensure that the thermal sensitive paper can be directly applied to the occasion of bill printing record, and the anti-counterfeiting information layer also bears corresponding anti-counterfeiting information through corresponding anti-counterfeiting ink pictures and texts or anti-counterfeiting microstructures so as to ensure the information safety of the thermal sensitive paper for displaying the thermal sensitive information, and is clamped in the thermal sensitive paper, so that the anti-counterfeiting information layer can be effectively prevented from being changed or damaged, the applicability of the anti-counterfeiting thermal sensitive paper to different occasions is improved, and the service life of the anti-counterfeiting thermal sensitive paper is prolonged.

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 anti-counterfeiting thermal paper for the anti-counterfeiting bill 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 security thermal paper for a security document according to an embodiment of the present invention is shown. The anti-counterfeiting thermal paper for the anti-counterfeiting bill comprises a substrate layer, a bill information layer, a first isolation layer, a thermal-sensitive color development layer, a second isolation layer, an anti-counterfeiting information layer and a packaging layer which are sequentially stacked from bottom to top; wherein the content of the first and second substances,

the substrate layer is a base paper fiber layer with a multi-layer composite structure;

the bill information layer is a relief structure layer which is arranged on the upper surface of the substrate layer and is used for presenting corresponding bill information;

the first isolating layer is a polyester material layer arranged on the upper surface of the bill information layer;

the heat-sensitive color development layer is formed by coating a heat-sensitive color development coating on the first separation layer;

the second isolation layer is a polyester material layer arranged on the upper surface of the thermosensitive color development layer;

the anti-counterfeiting information layer is an anti-counterfeiting ink picture and text or an anti-counterfeiting microstructure arranged on the upper surface of the second isolation layer;

the packaging layer is a polyester material layer arranged on the upper surface of the anti-counterfeiting information layer.

This an anti-fake thermal sensitive paper for anti-fake bill is used for showing corresponding bill information through this bill information layer and guarantees that this thermal sensitive paper can directly be applied to the occasion of bill printing record with this to still bear corresponding anti-fake information through corresponding anti-fake printing ink picture and text or anti-fake micro-structure through this anti-fake information layer, in order to guarantee that this thermal sensitive paper carries out the information security that thermal sensitive information shows, this bill information layer and this anti-fake information layer all press from both sides and establish inside this anti-fake thermal sensitive paper, it can realize this anti-fake thermal sensitive paper and set up about the integration of bill information and anti-fake information, thereby improve this anti-fake thermal sensitive paper's convenience in the bill printing process.

Preferably, in the substrate layer, the base paper fiber layer of the multilayer composite structure is formed by sequentially stacking a plurality of base paper fiber stacking units; wherein the content of the first and second substances,

each of the base paper fiber lamination units includes a first paper fiber film having a first thickness and a second paper fiber film having a second thickness;

the second paper fiber film is arranged above the first paper fiber film in a pressing mode, and the first thickness is larger than the second thickness.

The base layer is mutually overlapped through the base paper fiber laminating units, so that the situation that the base layer is warped due to the fact that single base paper fibers form the base layer can be avoided, and in addition, because the first paper fiber films and the second paper fiber films with different thicknesses are overlapped in each base paper fiber laminating unit, the toughness and the tear resistance of the base layer can be improved to the maximum extent on the premise that the thickness of the base paper fiber laminating unit is reduced.

Preferably, the ticket information layer is formed by a process,

a first step of coating a layer of photosensitive glue on at least a corresponding partial area of the upper surface of the substrate layer;

a second procedure, according to the presentation mode of the preset bill information, carrying out light radiation treatment on the photosensitive adhesive so as to form a relief structure corresponding to the preset bill information;

and a third step of subjecting the relief structure to a development treatment and a curing treatment to form the information layer of the bill.

The bill information layer manufactured and formed through the process can conveniently formulate corresponding bill information according to the format content of the bill, so that the thermal sensitive paper can be applied to different bill printing occasions, and the applicability of the thermal sensitive paper is improved.

Preferably, in the first process, the photosensitive paste is coated on the peripheral edge region of the upper surface of the substrate layer, and the coated area of the photosensitive paste is not more than 50% of the total area of the substrate layer.

The coating area corresponding to the photosensitive adhesive is set to be not more than 50% of the total area of the basal layer, so that the amount of the photosensitive adhesive can be reduced to the maximum extent on the premise of ensuring that bill information is fully and completely formed, and the manufacturing cost of the thermal paper is reduced.

Preferably, in the second process, the light irradiation energy density of the light irradiation treatment performed on the photosensitive paste is 50 to 150cal/cm2, and the duration of the light irradiation treatment is 5 to 20 s.

The parameter setting of the optical radiation energy density and duration of the optical radiation processing can effectively improve the manufacturing efficiency and the manufacturing accuracy of the bill information layer, thereby reducing the manufacturing defective rate of the bill information layer.

Preferably, in the first separator layer, the thickness of the polyester material layer is not less than the maximum depth of depression of the relief structure present in the ticket information layer;

the glass transition temperature of the polyester material adopted by the polyester material layer is not lower than 150 ℃.

The first isolation layer is formed by adopting the polyester material with the glass transition temperature not lower than 150 ℃, so that the thermal isolation performance of the first isolation layer can be effectively improved, and the condition that the bill information layer is thermally corroded to cause the loss of the bill information is avoided.

Preferably, in the thermosensitive color developing layer, the thermosensitive color developing coating is prepared by mixing an organic solvent, thermosensitive color developing particles, a dispersant, a developer, a stabilizer and an antioxidant in a ratio of 35 to 65: 15-25: 1-3: 1-3: 0.5-: 0.5-1 weight ratio under the temperature condition of 20-30 ℃.

The thermosensitive developing coating formed by mixing the components, the weight ratio and the temperature condition can effectively improve the thermosensitive developing stability and the durability of the thermosensitive developing layer.

Preferably, in the second isolation layer, the polyester material layer is made of transparent polyester material, and the thickness of the polyester material layer is smaller than that of the thermosensitive color development layer;

the glass transition temperature of the polyester material adopted by the polyester material layer is not lower than 150 ℃.

The second isolation layer is formed by adopting the polyester material with the glass transition temperature not lower than 150 ℃, so that the thermal isolation performance of the second isolation layer can be effectively improved, and the condition that the thermosensitive color development layer generates thermal interference to cause the thermosensitive color development information to be degraded and lost is avoided.

Preferably, in the security information layer,

when the anti-counterfeiting ink image-text is arranged on the upper surface of the second isolation layer, the anti-counterfeiting ink image-text is holographic anti-counterfeiting color ink image-text or holographic anti-counterfeiting black-white ink image-text;

when the anti-counterfeiting microstructure is arranged on the upper surface of the second isolation layer, the anti-counterfeiting microstructure is an anti-counterfeiting grating microstructure or an anti-counterfeiting lens array microstructure, wherein the anti-counterfeiting grating microstructure is a one-dimensional anti-counterfeiting grating microstructure or a two-dimensional anti-counterfeiting grating microstructure.

The anti-counterfeiting information layer can set the type of the anti-counterfeiting information layer and the presentation form of the anti-counterfeiting information according to different application occasions and application requirements of the thermal sensitive paper, wherein holographic anti-counterfeiting color ink pictures and texts or holographic anti-counterfeiting black-and-white ink pictures and texts are adopted as the anti-counterfeiting ink pictures and texts, so that the manufacturing cost and the manufacturing difficulty of the anti-counterfeiting information layer can be effectively reduced, and anti-counterfeiting safety and efficiency of the anti-counterfeiting information layer can be improved by adopting an anti-counterfeiting grating microstructure or an anti-counterfeiting lens array microstructure as the anti-counterfeiting microstructure, so that the anti-counterfeiting information layer can.

Preferably, when the anti-counterfeiting ink graph and text is arranged on the upper surface of the second isolation layer, the thickness of the anti-counterfeiting information layer is 1000-1500 μm.

The anti-counterfeiting information layer with the anti-counterfeiting ink image-text is designed to have the thickness range, so that the thickness of the anti-counterfeiting information layer can be reduced to the maximum extent under the condition that the anti-counterfeiting ink image-text is completely displayed.

Preferably, when the anti-counterfeiting microstructure is arranged on the upper surface of the second isolating layer, the thickness of the anti-counterfeiting information layer is 1200 μm-1800 μm.

The anti-counterfeiting information layer with the anti-counterfeiting microstructure is designed to have the thickness range, so that the thickness of the anti-counterfeiting information layer can be reduced to the maximum extent under the condition that the anti-counterfeiting microstructure is guaranteed to be displayed completely.

Preferably, the packaging layer comprises an anti-grease sublayer and an anti-scratch sublayer which are sequentially stacked from bottom to top; wherein the content of the first and second substances,

the anti-grease sublayer is directly arranged on the upper surface of the anti-counterfeiting information layer, and the scratch-resistant sublayer is directly arranged on the upper surface of the anti-grease sublayer;

the thickness of the grease-resistant sublayer is equal to or less than that of the scratch-resistant sublayer.

The oil resistance and the scratch resistance of the thermal sensitive paper can be improved by sequentially laminating the grease-resistant sublayer and the scratch-resistant sublayer from bottom to top to form the packaging layer, so that the thermal sensitive paper is prevented from being polluted by grease from an operator and damaged by scratches in the operation process.

Preferably, the step of arranging the anti-counterfeiting ink image-text on the upper surface of the second isolation layer to form the anti-counterfeiting information layer comprises the steps of converting the anti-counterfeiting ink image-text into a square pattern, calculating the information of each pixel point corresponding to the square pattern, and then arranging the anti-counterfeiting ink image-text on the upper surface of the second isolation layer according to the information of each pixel point,

step S1, processing the anti-counterfeiting ink image-text to convert the anti-counterfeiting ink image-text into a square pattern with length and width of m, which comprises the following steps,

step S101, obtaining the image-text size of the anti-counterfeiting ink image-text, respectively setting the length and the width of the image-text size as l and w, selecting a smaller value of the image-text size as a standard value m and a larger value as a target adjustment value n, and adjusting by taking the length or the width corresponding to the target adjustment value as an adjustment direction;

step S102, according to the following formula (2), adjusting the redundant information in the adjusting direction

In the formula (2), s is redundant graphic and text information, double is a double-precision floating point number, mid is a middle transition parameter, and f is a set of positions corresponding to the redundant graphic and text information in the adjustment direction;

s103, compressing the redundant image-text information in equal proportion to convert the size of the adjustment direction of the redundant image-text information into a standard value m, so that the anti-counterfeiting ink image-text is converted into a square pattern with the length and the width of m;

step S2, calculating and obtaining information of each pixel point of the square pattern by the following formula (3)

In the above equation (3), P i, j is the pixel value of the point with coordinates i, j in the square pattern, mid i (i +1) is the pixel value of the point with coordinates i,0 in the square pattern, mid (j (j +1)) is the pixel value of the point with coordinates j,0 in the positive direction pattern,

the value of m and np is the rest, i is 1, 2, 3, … … m, j is 1, 2, 3, … … m;

step S3, generating two-dimensional code information about the square pattern according to the information of each pixel point, wherein the size of the two-dimensional code is d × d;

in step S4, the pixel value corresponding to the two-dimensional code information is calculated by the following formula (4)

In the above formula (4), EP (i, j) is a pixel value of a point having coordinates i, j in the image information corresponding to the two-dimensional code information, EP i + i1, j + j1 is a pixel value of a point having coordinates i + i1, j + j1 in the image information corresponding to the two-dimensional code information, and EPi + i2, j + j2 is a pixel value of a point having coordinates i + i2, j + j2 in the image information corresponding to the two-dimensional code information;

step S5, according to the calculation result in step S4, configuring the pixel values of all coordinate points in the image information corresponding to the two-dimensional code information into the image information of the two-dimensional code information, and according to the image information, performing an operation of setting an anti-counterfeiting ink image-text on the upper surface of the second isolation layer.

The operation of forming the anti-counterfeiting information layer by arranging the anti-counterfeiting ink pictures and texts on the upper surface of the second isolation layer can ensure the information safety of thermosensitive information display of the thermosensitive paper, and the anti-counterfeiting information layer is combined with a two-dimensional code identification technology to improve the applicability of the anti-counterfeiting thermosensitive paper to different occasions and increase the information bearing capacity of the anti-counterfeiting thermosensitive paper.

The embodiment of the invention also provides a method for manufacturing the anti-counterfeiting thermal paper for the anti-counterfeiting bill, which comprises the following steps:

step S1, manufacturing a base paper fiber layer with a multi-layer composite structure, thereby forming a base layer;

step S2, arranging a relief structure layer for presenting corresponding bill information on the upper surface of the substrate layer, thereby forming a bill information layer;

step S3, forming a first isolation layer on the polyester material layer on the upper surface of the bill information layer;

step S4, applying a thermosensitive color-developing coating to the first partition layer to form a thermosensitive color-developing layer;

step S5, arranging a polyester material layer on the upper surface of the heat-sensitive color development layer, thereby forming a second isolation layer;

step S6, arranging anti-counterfeiting ink image-text or anti-counterfeiting microstructure on the upper surface of the second isolation layer to form an anti-counterfeiting information layer, wherein the step of arranging anti-counterfeiting ink image-text on the upper surface of the second isolation layer to form the anti-counterfeiting information layer is to convert the anti-counterfeiting ink image-text into a square pattern, calculate the pixel point information corresponding to the square pattern, and then carry out the operation of arranging anti-counterfeiting ink image-text on the upper surface of the second isolation layer according to the pixel point information, and the specific process comprises the following steps,

step S601, the anti-counterfeiting ink image-text is processed to convert the anti-counterfeiting ink image-text into a square pattern with length and width of m, the specific steps are as follows,

step S6011, obtaining the image-text size of the anti-counterfeiting ink image-text, setting the length and the width of the image-text size to l and w respectively, selecting a smaller value of the image-text size as a standard value m and a larger value as a target adjustment value n, and adjusting by taking the length or the width corresponding to the target adjustment value as an adjustment direction;

step S6012, the redundant information in the adjustment direction is adjusted according to the following formula (2)

In the formula (2), s is redundant graphic and text information, double is a double-precision floating point number, mid is a middle transition parameter, and f is a set of positions corresponding to the redundant graphic and text information in the adjustment direction;

s6013, compressing the redundant image-text information in equal proportion to convert the size of the adjustment direction of the redundant image-text information into a standard value m, so that the anti-counterfeiting ink image-text is converted into a square pattern with the length and the width of m;

step S602, calculating and obtaining information of each pixel point of the square pattern by the following formula (3)

In the above equation (3), P iJ is the pixel value of a point with coordinates i, j in the square pattern, mid i (i +1) is the pixel value of a point with coordinates i,0 in the square pattern, mid (j (j +1)) is the pixel value of a point with coordinates j,0 in the positive direction pattern,

the value of m and np is the rest, i is 1, 2, 3, … … m, j is 1, 2, 3, … … m;

step S603, generating two-dimensional code information about the square pattern according to the information of each pixel point, wherein the size of the two-dimensional code is d x d;

step S604, calculating a pixel value corresponding to the two-dimensional code information by the following formula (4)

In the above formula (4), EP (i, j) is a pixel value of a point having coordinates i, j in the image information corresponding to the two-dimensional code information, EP i + i1, j + j1 is a pixel value of a point having coordinates i + i1, j + j1 in the image information corresponding to the two-dimensional code information, and EPi + i2, j + j2 is a pixel value of a point having coordinates i + i2, j + j2 in the image information corresponding to the two-dimensional code information;

step S5, according to the calculation result of step S4, configuring the pixel values of all coordinate points in the image information corresponding to the two-dimensional code information into the image information of the two-dimensional code information, and according to the image information, performing an operation of setting an anti-counterfeiting ink image-text on the upper surface of the second isolation layer;

step S6, a polyester material layer is disposed on the upper surface of the anti-counterfeiting information layer, so as to form an encapsulation layer.

The contents of the above embodiments show that the anti-counterfeiting thermal paper for the anti-counterfeiting bill is formed by sequentially stacking the substrate layer, the bill information layer, the first isolation layer, the thermal coloration layer, the second isolation layer, the anti-counterfeiting information layer and the packaging layer from bottom to top, wherein the bill information layer is used for presenting corresponding bill information so as to ensure that the thermal paper can be directly applied to the occasion of printing and recording of the bill, and the anti-counterfeiting information layer also bears corresponding anti-counterfeiting information through corresponding anti-counterfeiting ink pictures and texts or anti-counterfeiting microstructures so as to ensure the information security of the thermal information display of the thermal paper, and the anti-counterfeiting information layer is clamped inside the thermal paper, so that the anti-counterfeiting information layer can be effectively prevented from being changed or damaged, thereby improving the applicability of the anti-counterfeiting thermal paper to different occasions and prolonging the service life of the anti-counterfeiting thermal paper.

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.