CN111549570A - Production process of thermal paper - Google Patents

Production process of thermal paper Download PDF

Info

Publication number
CN111549570A
CN111549570A CN202010424643.4A CN202010424643A CN111549570A CN 111549570 A CN111549570 A CN 111549570A CN 202010424643 A CN202010424643 A CN 202010424643A CN 111549570 A CN111549570 A CN 111549570A
Authority
CN
China
Prior art keywords
coating
base paper
oven
paper
particle size
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010424643.4A
Other languages
Chinese (zh)
Inventor
林土珍
叶旭峰
叶建明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Jiancai Paper Technology Co ltd
Original Assignee
Guangdong Jiancai Paper Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Jiancai Paper Technology Co ltd filed Critical Guangdong Jiancai Paper Technology Co ltd
Priority to CN202010424643.4A priority Critical patent/CN111549570A/en
Publication of CN111549570A publication Critical patent/CN111549570A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • 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
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/34—Knife or blade type coaters
    • 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
    • D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
    • D21H23/48—Curtain coaters
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/04—Physical treatment, e.g. heating, irradiating
    • D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper

Landscapes

  • Heat Sensitive Colour Forming Recording (AREA)
  • Paper (AREA)

Abstract

The invention discloses a production process of thermal paper, which comprises the following steps: step 1): placing base paper on an unwinding mechanism, and performing primary precoating on the base paper by using a coating mechanism by using a coating with a relatively thick particle size to form a first precoating layer; step 2): drying the base paper in the step 1) through an oven; step 3): performing secondary pre-coating on the base paper in the step 2) by using a coating mechanism by using a coating with relatively fine particle size to form a second pre-coating layer on the first pre-coating layer; step 4): drying the base paper in the step 3) through an oven; step 5): carrying out surface coating on the base paper in the step 4) by using a coating mechanism, and forming a surface coating on the second pre-coating layer; step 6): drying the base paper in the step 5) through an oven; step 7): the raw paper in the step 6) is collected by a winding mechanism, and the invention provides the production process of the thermal sensitive paper with low cost and high profit.

Description

Production process of thermal paper
Technical Field
The invention relates to the field of thermal paper materials, in particular to a production process of thermal paper.
Background
The thermal paper is an information recording paper coated with a coloring material that develops color by itself when excited by a thermal signal. The thermal sensitive paper is popularized and rapidly developed in the world along with fax machines, along with the development of electronic communication industry, the thermal sensitive paper is not only popularized in personal families in the form of fax paper, but also appears in various fields such as businesses, supermarkets, banks, hospitals, airports and the like, the application is gradually wide, the variety is gradually increased, and the application range is gradually widened. According to the prior art, the coating process of the thermal paper is to pre-coat a layer of base paper, then coat a layer of base paper and finally carry out press polishing. In order to ensure the printing effect of the thermal paper, base paper with smoothness of more than 50S is generally selected for coating, and meanwhile, a calendaring process is adopted. The smoothness of the base paper on the market is more about 30S, so that the selection range of the base paper is small; on the other hand, the thickness of the coated paper after calendering is lost, the calendering can lose about 5 microns of the thickness of the thermal paper, the selling price of the thermal paper is related to the thickness, and the thicker the thermal paper, the higher the price is.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the production process of the thermal paper with low cost and high profit is provided.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a production process of thermal paper comprises the following steps:
step 1): placing base paper on an unwinding mechanism, and performing primary precoating on the base paper by using a coating mechanism by using a coating with a relatively thick particle size to form a first precoating layer;
step 2): drying the base paper in the step 1) through an oven;
step 3): performing secondary pre-coating on the base paper in the step 2) by using a coating mechanism by using a coating with relatively fine particle size to form a second pre-coating layer on the first pre-coating layer;
step 4): drying the base paper in the step 3) through an oven;
step 5): carrying out surface coating on the base paper in the step 4) by using a coating mechanism, and forming a surface coating on the second pre-coating layer;
step 6): drying the base paper in the step 5) through an oven;
step 7): collecting the base paper in the step 6) by using a winding mechanism.
After adopting the structure, compared with the prior art, the invention has the following advantages: precoating is carried out twice, realize through coating mechanism, precoating priming coat for the first time, with the thick coating of granule, the smoothness degree of body paper is improved, precoating for the second time uses fresh coating (the granule is thin), coating surface smoothness degree is high, need not carry out the calendering process, carry out twice precoating and a surface coating, require relatively lower to the body paper, the body paper chooses smoothness degree for use to be 30s just can, coating finished paper thickness has the advantage, the equal price customer expects that the thickness of paper is some, utilize twice precoating, the smoothness degree that will coat finished paper improves, it also can guarantee the quality of finished paper finally not need the calendering, low cost and profit are high, it needs to explain: the first pre-coating and the second pre-coating are supplied in series, the first pre-coating is formed by the backflow of the second pre-coating, so the particle size is larger, the coating quality is stable, high-thickness qualified products can be coated on paper with low smoothness without a calendaring method, and the prior art can meet the use requirement only by selecting raw paper with smoothness of 80S.
Preferably, the D50 particle size of the paint in the first pre-coating in the step 1) is 5-15 μm, the D90 particle size is 25-35 μm, the D50 particle size is preferably 5, 10 and 15 μm, and the D90 particle size is preferably 25, 30 and 35 μm, so that the smoothness of the base paper can be greatly improved, and the base paper is the paint with relatively coarse particle size.
Preferably, the temperature of the oven in the step 2) is 100-200 ℃, the length of the oven is 10-20 m, the moving speed of the base paper in the oven is 4-8 m/s, the temperature of the oven is preferably 100, 150 and 200 ℃, the length of the oven is preferably 10, 15 and 20m, the moving speed of the base paper in the oven is preferably 4, 6 and 8m/s, and the drying efficiency is high and more uniform.
Preferably, the coating material in the second precoating in the step 3) has a D50 particle size of 2.5-3.0 μm, a D90 particle size of 8.0-9.0 μm, a D50 particle size of 2.5, 2.8 and 3 μm, and a D90 particle size of 8.0, 8.5 and 9.0 μm, and has high coating surface smoothness, and a calendering process is not required, so that the coating material has a relatively fine particle size.
Preferably, the temperature of the oven in the step 4) is 100-200 ℃, the length of the oven is 10-20 m, the moving speed of the base paper in the oven is 4-8 m/s, the temperature of the oven is preferably 100, 150 and 200 ℃, the length of the oven is preferably 10, 15 and 20m, the moving speed of the base paper in the oven is preferably 4, 6 and 8m/s, and the drying efficiency is high and more uniform.
Preferably, the thickness of the top coating in the step 5) is 3-3.5 μm, the thickness of the top coating is preferably 3, 3.2 and 3.5 μm, and the quality of finished paper can be ensured without calendering.
Preferably, the temperature of the oven in the step 6) is 100-200 ℃, the length of the oven is 10-20 m, the moving speed of the base paper in the oven is 4-8 m/s, the temperature of the oven is preferably 100, 150 and 200 ℃, the length of the oven is preferably 10, 15 and 20m, the moving speed of the base paper in the oven is preferably 4, 6 and 8m/s, and the drying efficiency is high and more uniform.
Preferably, the first precoating layer and the second precoating layer form a precoating layer, the coating weight of the precoating layer is 7-8 g/square meter, the coating weight of the precoating layer is preferably 7, 7.5 and 8 g/square meter, the smoothness of the base paper can be improved to the maximum extent, the smoothness of the coated surface is the highest, and a calendaring process is not required.
Preferably, the coating weight of the first pre-coating layer is 4g per square meter, and the coating weight of the second pre-coating layer is 4g per square meter, so that the effect is optimal, and the cost is low.
Preferably, the coating mechanism is one or more of a blade coating mechanism, a rod coating mechanism and a curtain coating mechanism.
Preferably, the coating liquid of the first pre-coating and the coating liquid of the second pre-coating are the same, and the coating liquid consists of the following components in parts by weight: 83-87% of calcined kaolin, 0.3-0.7% of dispersing agent, 10-14% of styrene-butadiene emulsion, 0.1-0.5% of water-retaining agent, 0.1-0.3% of defoaming agent and 1-3% of polyvinyl alcohol.
Preferably, the feeding mode of the first pre-coating and the second pre-coating is series feeding, the series feeding means that the first pre-coating comprises a first stirring tank and a first coating tank, the second pre-coating comprises a second stirring tank and a second coating tank, the first stirring tank, the second coating tank and the second stirring tank are sequentially distributed from left to right, the first coating tank is communicated with the first stirring tank, the second coating tank is communicated with the second stirring tank, a discharge port of the first coating tank and a discharge port of the second coating tank are communicated with a feed port of the first stirring tank, the first pre-coating and the second pre-coating are series feeding, the second pre-coating is always fresh coating, and the smoothness of a coating surface is high; the first precoating of the priming coat with coarse particles improves the base paper smoothness. The flatness of the base paper is improved by using coarse-grained materials, and the smoothness of the coated surface meets the requirement after calendering in the prior art by using fine-grained materials.
Drawings
FIG. 1 is a perspective view of a coating system in the thermal paper production process of the present invention;
FIG. 2 is a test chart of the printing effect of the thermal paper production process of the present invention;
FIG. 3 is a test chart of printing effect of the prior thermal paper production process.
The coating device comprises a coating machine, a coating machine and a coating mechanism, wherein the coating machine comprises a first coating tank, a first stirring tank, a second coating tank, a second stirring tank, a drying oven and a surface coating mechanism, wherein the coating machine comprises 1, a first coating tank, 2, a first stirring tank, 3.
→: representing the direction of liquid flow or the direction of movement of the base paper.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in the figure, the invention provides a production process of thermal paper, which comprises the following steps:
step 1): placing base paper on an unwinding mechanism, and performing primary precoating on the base paper by using a coating mechanism by using a coating with a relatively thick particle size to form a first precoating layer;
step 2): drying the base paper in the step 1) through an oven 5;
step 3): performing secondary pre-coating on the base paper in the step 2) by using a coating mechanism by using a coating with relatively fine particle size to form a second pre-coating layer on the first pre-coating layer;
step 4): drying the base paper in the step 3) through an oven 5;
step 5): carrying out surface coating on the base paper in the step 4) by using a coating mechanism, and forming a surface coating on the second pre-coating layer;
step 6): drying the base paper in the step 5) through an oven 5;
step 7): collecting the base paper in the step 6) by using a winding mechanism.
The invention has the advantages that the precoating is carried out twice, the precoating is realized by a coating mechanism, the first precoating and priming coating are carried out, the smoothness of the base paper is improved by using the coating with coarse particles, the second precoating is carried out by using fresh coating (fine particles), the smoothness of the coated surface is high, the calendering procedure is not needed, the two precoating and the one-time surface coating are carried out, the requirements on the base paper are relatively low, the smoothness is more than 30s, the coated finished paper has advantages, the thickness of the paper is expected to be larger by customers with the same price, the smoothness of the coated finished paper is improved by utilizing the two precoating, the quality of the finished paper can be ensured without calendering finally, the cost.
The same base paper with smoothness of 30S and thickness of 75um was used in the following examples.
Example one
Step 1): the base paper is placed on an unreeling mechanism, the base paper is precoated for the first time by a coating mechanism to form a first precoating layer, the D50 particle size of the coating in the first precoating is 5 microns, the D90 particle size is 25 microns, and the coating liquid of the first precoating layer consists of the following components in parts by weight: 83% of calcined kaolin, 0.3% of dispersing agent, 10% of butylbenzene emulsion, 0.1% of water-retaining agent, 0.1% of defoaming agent and 1% of polyvinyl alcohol;
step 2): drying the base paper in the step 1) through an oven 5, wherein the temperature of the oven 5 is 100 ℃, the length of the oven 5 is 15m, and the moving speed of the base paper in the oven 5 is 6 m/s;
step 3): carrying out secondary pre-coating on the base paper in the step 2) by using a coating mechanism to form a second pre-coating layer on the first pre-coating layer, wherein the D50 particle size of the coating in the secondary pre-coating is 2.5 mu m, the D90 particle size is 8.0 mu m, and the coating liquid of the secondary pre-coating layer is the same as that of the first pre-coating layer;
step 4): drying the base paper in the step 3) through an oven 5, wherein the temperature of the oven 5 is 100 ℃, the length of the oven 5 is 15m, and the moving speed of the base paper in the oven 5 is 6 m/s;
step 5): carrying out surface coating on the base paper in the step 4) by using a coating mechanism, and forming a surface coating on the second pre-coating, wherein the thickness of the surface coating is 3 mu m;
step 6): drying the base paper in the step 5) through an oven 5, wherein the temperature of the oven 5 is 100 ℃, the length of the oven 5 is 15m, and the moving speed of the base paper in the oven 5 is 6 m/s;
step 7): collecting the base paper in the step 6) by using a winding mechanism.
Example two
Step 1): the base paper is placed on an unreeling mechanism, the base paper is precoated for the first time by a coating mechanism to form a first precoating layer, the D50 particle size of the coating in the first precoating is 10 microns, the D90 particle size is 30 microns, and the coating liquid of the first precoating layer consists of the following components in parts by weight: 85% of calcined kaolin, 0.5% of dispersing agent, 12% of butylbenzene emulsion, 0.3% of water-retaining agent, 0.2% of defoaming agent and 2% of polyvinyl alcohol;
step 2): drying the base paper in the step 1) through an oven 5, wherein the temperature of the oven 5 is 150 ℃, the length of the oven 5 is 15m, and the moving speed of the base paper in the oven 5 is 6 m/s;
step 3): carrying out secondary pre-coating on the base paper in the step 2) by using a coating mechanism to form a second pre-coating layer on the first pre-coating layer, wherein the D50 particle size of the coating in the secondary pre-coating is 2.8 mu m, the D90 particle size is 8.5 mu m, and the coating liquid of the secondary pre-coating layer is the same as that of the first pre-coating layer;
step 4): drying the base paper in the step 3) through an oven 5, wherein the temperature of the oven 5 is 150 ℃, the length of the oven 5 is 15m, and the moving speed of the base paper in the oven 5 is 6 m/s;
step 5): carrying out surface coating on the base paper in the step 4) by using a coating mechanism, and forming a surface coating on the second pre-coating, wherein the thickness of the surface coating is 3.2 mu m;
step 6): drying the base paper in the step 5) through an oven 5, wherein the temperature of the oven 5 is 150 ℃, the length of the oven 5 is 15m, and the moving speed of the base paper in the oven 5 is 6 m/s;
step 7): collecting the base paper in the step 6) by using a winding mechanism.
EXAMPLE III
Step 1): the base paper is placed on an unreeling mechanism, the base paper is pre-coated for the first time by a coating mechanism to form a first pre-coating layer, the D50 particle size of the coating in the first pre-coating is 15 micrometers, the D90 particle size is 35 micrometers, the D50 particle size of the coating in the first pre-coating is 5 micrometers, the D90 particle size is 25 micrometers, and the coating liquid of the first pre-coating layer comprises the following components in parts by weight: 87% of calcined kaolin, 0.7% of dispersing agent, 14% of butylbenzene emulsion, 0.5% of water-retaining agent, 0.3% of defoaming agent and 3% of polyvinyl alcohol;
step 2): drying the base paper in the step 1) through an oven 5, wherein the temperature of the oven 5 is 200 ℃, the length of the oven 5 is 15m, and the moving speed of the base paper in the oven 5 is 6 m/s;
step 3): carrying out secondary pre-coating on the base paper in the step 2) by using a coating mechanism to form a second pre-coating layer on the first pre-coating layer, wherein the D50 particle size of the coating in the secondary pre-coating is 3.0 mu m, the D90 particle size is 9.0 mu m, and the coating liquid of the secondary pre-coating layer is the same as that of the first pre-coating layer;
step 4): drying the base paper in the step 3) through an oven 5, wherein the temperature of the oven 5 is 200 ℃, the length of the oven 5 is 15m, and the moving speed of the base paper in the oven 5 is 6 m/s;
step 5): carrying out surface coating on the base paper in the step 4) by using a coating mechanism, and forming a surface coating on the second pre-coating, wherein the thickness of the surface coating is 3.5 mu m;
step 6): drying the base paper in the step 5) through an oven 5, wherein the temperature of the oven 5 is 200 ℃, the length of the oven 5 is 15m, and the moving speed of the base paper in the oven 5 is 6 m/s;
step 7): collecting the base paper in the step 6) by using a winding mechanism.
The first comparative example is as follows: step 1): the base paper is placed on an unreeling mechanism, the base paper is precoated for one time by a coating mechanism to form a precoating layer, the D50 particle size of the coating in the precoating is 2.8 mu m, the D90 particle size is 8.5 mu m, and the coating liquid of the precoating layer consists of the following components in parts by weight: 85% of calcined kaolin, 0.5% of dispersing agent, 12% of butylbenzene emulsion, 0.3% of water-retaining agent, 0.2% of defoaming agent and 2% of polyvinyl alcohol;
step 2): drying the base paper in the step 1) through an oven, wherein the temperature of the oven is 150 ℃, the length of the oven is 15m, and the moving speed of the base paper in the oven is 6 m/s;
step 3): carrying out surface coating on the base paper in the step 2) by using a coating mechanism to form a surface coating on the precoating layer, wherein the thickness of the surface coating is 3.2 mu m;
step 4): drying the base paper in the step 3) by an oven, wherein the temperature of the oven is 150 ℃, the length of the oven is 15m, and the moving speed of the base paper in the oven is 6 m/s;
step 5): collecting the base paper in the step 4) by using a winding mechanism.
Comparative example two: step 1): the base paper is placed on an unreeling mechanism, the base paper is precoated for one time by a coating mechanism to form a precoating layer, the D50 particle size of the coating in the precoating is 2.8 mu m, the D90 particle size is 8.5 mu m, and the coating liquid of the precoating layer consists of the following components in parts by weight: 85% of calcined kaolin, 0.5% of dispersing agent, 12% of butylbenzene emulsion, 0.3% of water-retaining agent, 0.2% of defoaming agent and 2% of polyvinyl alcohol;
step 2): drying the base paper in the step 1) through an oven, wherein the temperature of the oven is 150 ℃, the length of the oven is 15m, and the moving speed of the base paper in the oven is 6 m/s;
step 3): carrying out surface coating on the base paper in the step 2) by using a coating mechanism to form a surface coating on the precoating layer, wherein the thickness of the surface coating is 3.2 mu m;
step 4): drying the base paper in the step 3) by an oven, wherein the temperature of the oven is 150 ℃, the length of the oven is 15m, and the moving speed of the base paper in the oven is 6 m/s;
step 5): and calendering the base paper in the step 4) by using a calendering mechanism.
Step 6): collecting the base paper in the step 5) by using a winding mechanism.
The same base paper with smoothness of 30S and thickness of 75um is selected in the first embodiment, the second embodiment, the third embodiment, the first comparison embodiment and the second comparison embodiment, and the base paper with smoothness of 80S and thickness of 75um is selected in the prior art paper sample.
Figure BDA0002498225650000091
Note: the print resolution was 5 best and 1 worst
The comparison example in the table is that the base paper is pre-coated once and then is not calendered, the D50 particle size of the coating in the pre-coating is 2.8 mu m, and the D90 particle size is 8.5 mu m; in the second control example, the base paper was pre-coated once and then calendered, and the D50 particle size of the coating in the pre-coating was 2.8 μm and the D90 particle size was 8.5 μm.
The above tables are a comparison of smoothness, thickness and print definition of the first precoated thermal paper of example a, example two, example three, comparative example one, comparative example two and the prior art, and thus it can be seen that the thermal paper produced by using two precoatings in the present application has no loss of thickness and has an increase in thickness compared with the base paper; compared with the base paper, the thickness of the thermal sensitive paper produced in the prior art is lost; the reason for the thickness loss can be seen from the comparison examples I and II that the calendering process is adopted, meanwhile, as can be seen from figure 2, the thermal paper produced by the production process provided by the invention is clear in printing without break points, and as can be seen from figure 3, the thermal paper produced by the production process in the prior art is printed with break points, so that the thermal paper produced by the production process provided by the invention is low in cost and good in printing effect.
According to the technical scheme, the first pre-coating and the second pre-coating are in series feeding, the second pre-coating is always realized by using fresh coating, and the smoothness of the coated surface is high; the first precoating of the priming coat with coarse particles improves the base paper smoothness.
The feeding mode of the technical scheme is as follows: the first precoating comprises a first stirring tank 2 and a first coating tank 1, the second precoating comprises a second stirring tank 4 and a second coating tank 3, the first coating tank 1, the first stirring tank 2, the second coating tank 3 and the second stirring tank 4 are sequentially distributed from left to right, the first coating tank 1 is communicated with the first stirring tank 2, the second coating tank 3 is communicated with the second stirring tank 4, only fresh materials are added into the second stirring tank 4, and the materials in the first coating tank 1 and the second coating tank 3 are totally refluxed into the first stirring tank 2, so that the first precoating is ensured to be coarse-grained materials, the second precoating is fine-grained materials, the first precoating and the second precoating are supplied in series, the second precoating is always fresh coatings, and the smoothness of the coating surface is high; the coarse-particle coating for primary pre-coating priming coating improves the smoothness of base paper, and the surface coating is realized by a surface coating mechanism 6, wherein the base paper is pre-coated for the first time from a first coating groove 1, then pre-coated for the second time from a second coating groove 3, and finally subjected to the surface coating by the surface coating mechanism.
The feeding mode of the prior art precoating is as follows: the method is characterized in that a stirring tank and a coating tank are arranged, the stirring tank conveys new materials to the coating tank to precoat the base paper, the coating precoated by the coating tank returns to the stirring tank, and the new materials are continuously added into the stirring tank, so that the new materials and the returned materials are mixed together, the precoated particle size of the coating head is changed from D50 particle size of 2.5 mu m to D90 particle size of 8.0 mu m to D50 particle size of 15 mu m to D90 particle size of 30 mu m, and the smoothness of the coated surface is reduced (the new materials are fine materials, and the returned materials are coarse materials).
The present invention is not limited to the above-described embodiments, and various modifications and variations of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.

Claims (10)

1. A production process of thermal paper is characterized in that: the method comprises the following steps:
step 1): placing base paper on an unwinding mechanism, and performing primary precoating on the base paper by using a coating mechanism by using a coating with a relatively thick particle size to form a first precoating layer;
step 2): drying the base paper in the step 1) through an oven;
step 3): performing secondary pre-coating on the base paper in the step 2) by using a coating mechanism by using a coating with relatively fine particle size to form a second pre-coating layer on the first pre-coating layer;
step 4): drying the base paper in the step 3) through an oven;
step 5): carrying out surface coating on the base paper in the step 4) by using a coating mechanism, and forming a surface coating on the second pre-coating layer;
step 6): drying the base paper in the step 5) through an oven;
step 7): collecting the base paper in the step 6) by using a winding mechanism.
2. The thermal paper production process according to claim 1, characterized in that: the D50 particle size of the coating in the first pre-coating in the step 1) is 5-15 microns, and the D90 particle size is 25-35 microns.
3. The thermal paper production process according to claim 1, characterized in that: the temperature of the oven in the step 2) is 100-200 ℃, the length of the oven is 10-20 m, and the moving speed of the base paper in the oven is 4-8 m/s.
4. The thermal paper production process according to claim 1, characterized in that: the D50 particle size of the coating in the second pre-coating in the step 3) is 2.5-3.0 μm, and the D90 particle size is 8.0-9.0 μm.
5. The thermal paper production process according to claim 1, characterized in that: the temperature of the oven in the step 4) is 100-200 ℃, the length of the oven is 10-20 m, and the moving speed of the base paper in the oven is 4-8 m/s.
6. The thermal paper production process according to claim 1, characterized in that: the thickness of the surface coating in the step 5) is 3-3.5 mu m.
7. The thermal paper production process according to claim 1, characterized in that: the temperature of the oven in the step 6) is 100-200 ℃, the length of the oven is 10-20 m, and the moving speed of the base paper in the oven is 4-8 m/s.
8. The thermal paper production process according to claim 1, characterized in that: the first precoating layer and the second precoating layer form a precoating layer, and the coating weight of the precoating layer is 7-8 g per square meter.
9. The thermal paper production process according to claim 8, characterized in that: the coating weight of the first pre-coating layer is 4g per square meter, and the coating weight of the second pre-coating layer is 4g per square meter.
10. The thermal paper production process according to claim 1, characterized in that: the feeding mode of the first pre-coating and the second pre-coating is serial feeding.
CN202010424643.4A 2020-05-19 2020-05-19 Production process of thermal paper Pending CN111549570A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010424643.4A CN111549570A (en) 2020-05-19 2020-05-19 Production process of thermal paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010424643.4A CN111549570A (en) 2020-05-19 2020-05-19 Production process of thermal paper

Publications (1)

Publication Number Publication Date
CN111549570A true CN111549570A (en) 2020-08-18

Family

ID=71999884

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010424643.4A Pending CN111549570A (en) 2020-05-19 2020-05-19 Production process of thermal paper

Country Status (1)

Country Link
CN (1) CN111549570A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112663388A (en) * 2020-12-28 2021-04-16 江苏金大包装材料科技有限公司 Production process of thermosensitive material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013241693A (en) * 2012-05-21 2013-12-05 Oji Holdings Corp Method of manufacturing coated paper
CN104313939A (en) * 2014-08-25 2015-01-28 海南金海浆纸业有限公司 High-turning-speed multi-layer coating paint
CN106192561A (en) * 2016-07-08 2016-12-07 广东松炀再生资源股份有限公司 A kind of Anti-fake thermosensitive paper and production method thereof
CN210262495U (en) * 2019-05-31 2020-04-07 广东简彩纸业科技有限公司 Thermal paper coating series connection feeding device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013241693A (en) * 2012-05-21 2013-12-05 Oji Holdings Corp Method of manufacturing coated paper
CN104313939A (en) * 2014-08-25 2015-01-28 海南金海浆纸业有限公司 High-turning-speed multi-layer coating paint
CN106192561A (en) * 2016-07-08 2016-12-07 广东松炀再生资源股份有限公司 A kind of Anti-fake thermosensitive paper and production method thereof
CN210262495U (en) * 2019-05-31 2020-04-07 广东简彩纸业科技有限公司 Thermal paper coating series connection feeding device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
胡志军（主编）: "《特种纸实用技术教程》", 30 June 2019, 中国轻工业出版社 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112663388A (en) * 2020-12-28 2021-04-16 江苏金大包装材料科技有限公司 Production process of thermosensitive material

Similar Documents

Publication Publication Date Title
CN104395415B (en) Ink film constructs
CN104271687B (en) Ink film constructs
CN111549570A (en) Production process of thermal paper
CN103442898B (en) Ink-jet media
CN106084986A (en) Ink film constructs
CN103124930B (en) High opacity laser can print face material
US6139613A (en) Multilayer pigments and their manufacture
CN102256803A (en) Liquid toner digitally printable media
JP5238811B2 (en) Interior material manufacturing method using transfer paper and interior material using the method
CN114228355B (en) Resin ribbon suitable for multiple types of base materials and preparation method thereof
JPH10235994A (en) Ink jet recording material and its manufacture
CN106009911A (en) High-resolution thermal transfer ribbon and preparation method thereof
CN100572663C (en) Coated paper for printing
CN105839457B (en) Three-proofing thermal sensitive paper and manufacturing process thereof
CN116289329A (en) Coated printing paper, method for producing the same and food container having printed pattern
CN102632738A (en) Digital image film and preparation method thereof
JP2007524006A (en) Support base material for photographic base material and method for producing coated paper
WO2006060216A1 (en) Resin coated papers with improved performance
CN109693463A (en) Pearly-lustre printed medium and preparation method thereof
CN102378841A (en) Printable matt fine paper and method of preparing same
JP5733174B2 (en) Method for producing dispersion
JPH0827934B2 (en) Magnetic card
CN102416790B (en) Transfer type magnetic bar
JPH11977A (en) White polyester film
JP5552371B2 (en) White conductive powder and method for producing the same

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination