CN108149514B - Transfer paper and preparation method thereof - Google Patents

Transfer paper and preparation method thereof Download PDF

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Publication number
CN108149514B
CN108149514B CN201711382268.6A CN201711382268A CN108149514B CN 108149514 B CN108149514 B CN 108149514B CN 201711382268 A CN201711382268 A CN 201711382268A CN 108149514 B CN108149514 B CN 108149514B
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China
Prior art keywords
layer
parts
paper
transfer paper
back coating
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CN201711382268.6A
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CN108149514A (en
Inventor
余赞
章杰
田璐
陈华
李璐
张敬
韩磊
钟文
杜建军
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Changde Luoen Holographic Material Technology Co ltd
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Changde Jinde New Material Technology Co Ltd
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • 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
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • 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
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/18—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising waxes
    • 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
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/34—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising cellulose or derivatives thereof
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/64—Addition to the formed paper by contacting paper with a device carrying the material the material being non-fluent at the moment of transfer, e.g. in form of preformed, at least partially hardened coating
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)
  • Paper (AREA)

Abstract

The invention relates to transfer paper and a preparation method thereof, wherein the transfer paper comprises a back coating layer, a raw paper layer, a glue layer, an aluminum-plated layer, a transfer layer and a varnish layer which are sequentially stacked, the back coating layer is made of paper back coating emulsion, and the paper back coating emulsion is mainly prepared from the following raw materials in parts by mass: 10-14 parts of water, 12-16 parts of acrylic emulsion, 1-4 parts of wax emulsion, 1-4 parts of gamma-polyglutamic acid, 0.5-1.5 parts of sodium alginate, 0.5-1 part of calcium chloride, 0.5-2 parts of ketone removing additive and 0.03-0.2 part of auxiliary agent. The transfer paper has good water retention capacity and water absorption, can prevent moisture of the base paper from permeating, and can absorb moisture condensed on the surface in the environment, so that the problem of mutual adhesion when the transfer paper is placed in a stacked mode is solved, the transfer paper can be separated easily during subsequent processing and use, damage and scrap caused by improper separation are avoided, the production efficiency is effectively improved, the production cost is reduced, and the market application prospect is wide.

Description

Transfer paper and preparation method thereof
Technical Field
The invention relates to the technical field of packaging, in particular to transfer paper and a preparation method thereof.
Background
Along with the continuous fierce market competition and the continuous improvement of the consumer taste, the packaging industry also faces great challenges, in recent years, the packaging printing industry develops towards the direction of energy conservation and environmental protection along with the market step, and the transfer paper is one of the industry. The transfer paper is converted from the original composite paper, and has strong market adaptability in the aspects of printing process and environmental protection. At present, the transfer paper has better performance in the aspects of glossiness, smoothness, flexibility, environmental protection, printing adaptability and the like, and is widely applied to the packaging of high-grade commodities such as cigarettes, wine, tea, cosmetics and the like, in particular to the packaging of tobacco products.
In the processing and transportation process of transfer paper, often need to transfer many stacks of paper and place, but general stack of transfer paper is easy mutual adhesion when placing, need carefully separate it when carrying out subsequent processing or using, otherwise the misoperation easily leads to the transfer paper surface to produce the damage and scrap, this greatly reduced production efficiency, improved manufacturing cost.
Disclosure of Invention
In view of this, there is a need for a transfer paper that is less likely to stick to each other.
The transfer paper comprises a back coating, a raw paper layer, a glue layer, an aluminum-plated layer, a transfer layer and a varnish layer which are sequentially stacked, wherein the back coating is prepared from a paper back coating emulsion, and the paper back coating emulsion is mainly prepared from the following raw materials in parts by mass: 10-14 parts of water, 12-16 parts of acrylic emulsion, 1-4 parts of wax emulsion, 1-4 parts of gamma-polyglutamic acid, 0.5-1.5 parts of sodium alginate, 0.5-1 part of calcium chloride, 0.5-2 parts of ketone removing additive and 0.03-0.2 part of auxiliary agent.
In one embodiment, the raw materials further comprise 0.2-0.8 part of silk fibroin and 0.2-0.8 part of cattail wool fiber by mass.
In one embodiment, the raw material further comprises 0.1-0.5 part of molybdenum disulfide by mass.
In one embodiment, the raw materials further comprise 0.1-0.3 part of cellulose ether and 0.1-0.3 part of starch ether by weight.
In one embodiment, the ketone removal additive consists of ethanolamine, dimethylbiguanide, propylenediamine and citric acid in a mass ratio of 2:3:1: 1.
In one embodiment, the auxiliary agent is one or more of a defoaming agent, a preservative, and a leveling agent.
In one embodiment, the leveling agent is one or more of BYK-331, BYK-354, and BYK-323.
In one embodiment, the gram weight of the back coating is 0.2-0.3 g/m2。
In one embodiment, the thickness of the aluminum plating layer is 35nm to 45 nm.
The invention also provides a preparation method of the transfer paper, which comprises the following steps:
forming the transfer layer on a base film, aluminizing the transfer layer to form the aluminum-plated layer, and forming the glue layer on the aluminum-plated layer;
forming the back coating on one surface of the base paper, and then attaching the surface of the base paper, which is far away from the back coating, to the glue layer;
and stripping the base film, and forming the varnish layer on the transfer layer to obtain the transfer paper.
The applicant finds that when the transfer papers are stacked for a long time, the front surfaces and the back surfaces (back coatings) of the adjacent transfer papers are mutually adhered, and particularly, the mutual adhesion is easy to occur in a high-temperature and high-humidity environment, because the moisture in the base paper of the transfer papers permeates to the surface of the back coatings at a high temperature, and the moisture in high-humidity air is condensed on the surface of the back coatings, so that the adjacent transfer papers are mutually adhered after the long-time action, and the subsequent processing and use are influenced. According to the invention, the acrylic acid emulsion, the wax emulsion, the gamma-polyglutamic acid, the sodium alginate, the calcium chloride, other additives and auxiliaries are used as raw materials to prepare the paper back coating emulsion, and the paper back coating emulsion can be used for preparing the transfer paper back coating to improve the water retention capacity and water absorption, prevent the water of the base paper from permeating out, and absorb the water condensed on the surface in the environment, so that the problem of mutual adhesion when the transfer paper is placed in a stacked mode is solved, so that the transfer paper can be separated more easily during subsequent processing and use, damage and scrapping caused by improper separation are avoided, the production efficiency is effectively improved, and the production cost is. The gamma-polyglutamic acid is a biodegradable non-toxic environment-friendly material, has strong water absorption and retention performance, and can be blended and crosslinked with other components to enable the back coating to obtain better water absorption and retention rate, while the wax emulsion can form a multi-layer homogeneous and continuous wax film layer in the back coating to play a certain role in water resistance and permeability resistance, and the sodium alginate is partially crosslinked under the action of calcium chloride to form tiny calcium alginate film shells which are randomly distributed in the continuous wax film layer, so that the water retention and barrier capability is further improved, the back coating can keep certain strength after absorbing water, the adhesion with adjacent transfer paper is effectively avoided, the production efficiency and the production quality are improved, the production cost is reduced, and the gamma-polyglutamic acid has very positive significance.
Drawings
Fig. 1 is a schematic structural view of a transfer sheet of an embodiment.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to make the objects, features and advantages thereof more comprehensible. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in many ways different from those described herein, and it will be apparent to those skilled in the art that similar modifications may be made without departing from the spirit of the invention, and the invention is therefore not limited to the specific embodiments disclosed below.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the transfer paper 100 according to an embodiment of the present invention includes a back coating layer 10, a raw paper layer 20, a glue layer 30, an aluminum-plated layer 40, a transfer layer 50, and a varnish layer 60, which are sequentially stacked, wherein the back coating layer 10 is made of a paper back coating emulsion, and the paper back coating emulsion is mainly prepared from the following raw materials in parts by mass: 10-14 parts of water, 12-16 parts of acrylic emulsion, 1-4 parts of wax emulsion, 1-4 parts of gamma-polyglutamic acid, 0.5-1.5 parts of sodium alginate, 0.5-1 part of calcium chloride, 0.5-2 parts of ketone removing additive and 0.03-0.2 part of auxiliary agent.
The paper back coating emulsion is prepared by taking the acrylic emulsion, the wax emulsion, the gamma-polyglutamic acid, the sodium alginate, the calcium chloride, other additives and auxiliaries as raw materials, and can improve the water retention capacity and water absorption when being used for preparing the back coating 10 of the transfer paper 100, prevent the water of the base paper from permeating out, and simultaneously absorb the water condensed on the surface in the environment, so that the problem that the transfer paper 100 is mutually adhered when being stacked is solved, the transfer paper is easily separated during subsequent processing and use, damage and scrapping caused by improper separation are avoided, the production efficiency is effectively improved, and the production cost is reduced. The gamma-polyglutamic acid is a biodegradable non-toxic environment-friendly material, has strong water absorption and retention performance, the back coating can obtain better water absorption and retention rate by blending and crosslinking with other components, the wax emulsion can form a multi-layer homogeneous and continuous wax film layer in the back coating 10 to play a certain role in water resistance and permeability resistance, and the sodium alginate is partially crosslinked under the action of calcium chloride to form tiny calcium alginate film shells which are randomly distributed in the continuous wax film layer, so that the water retention and barrier capability is further improved, the back coating 10 can keep certain strength after absorbing water, the mutual adhesion with adjacent transfer paper 100 is effectively avoided, the production efficiency and quality are improved, the production cost is reduced, and the gamma-polyglutamic acid has very positive significance.
In one embodiment, the raw materials further comprise 0.2-0.8 part of silk fibroin and 0.2-0.8 part of cattail wool fiber by mass. The moisturizing factor contained in the silk fibroin is more excellent than that of the conventional chemical moisturizing agent, can absorb and lock water for a long time, can enhance the strength and elasticity of the silk fibroin to a certain extent by blending modification with sodium alginate, improves the mechanical property, and avoids the brittleness of the silk fibroin from influencing the flexibility of the transfer paper; the large-cavity structure and the surface wax of the cattail wool fiber provide excellent oil absorption performance for the cattail wool fiber, prevent the loss of oily substances and further improve the loss of moisture to a certain extent.
In one embodiment, the raw material further comprises 0.1-0.5 parts of molybdenum disulfide by mass. The addition of a certain amount of molybdenum disulfide powder can improve the thermal stability and bending strength of the back coating 10, and the antistatic property, stain resistance and abrasion resistance of the back coating 10 are improved by the excellent conductivity and lubricity of molybdenum disulfide.
In one embodiment, the raw materials further comprise 0.1-0.3 part of cellulose ether and 0.1-0.3 part of starch ether by weight. By adding a certain amount of cellulose ether and starch ether, the water-retaining property of the back coating emulsion is ensured, and simultaneously, the appropriate viscosity can be controlled by blending with other raw materials, so that the bonding strength with the base paper is better improved, the water-retaining effect is better, and the comprehensive performance is excellent.
In one embodiment, the wax emulsion is one or more of polyethylene wax, polytetrafluoroethylene wax, and polypropylene wax, which has excellent cold resistance, heat resistance, chemical resistance, and abrasion resistance, and can improve the gloss and abrasion resistance of paper, and enhance the aesthetic appearance of paper.
In one embodiment, the ketone removal additive is composed of ethanolamine, dimethylbiguanide, propylenediamine, and citric acid in a mass ratio of 2:3:1: 1. The ethanolamine, the dimethylbiguanide, the propylenediamine and the citric acid are compounded, so that the composition can be better matched with other raw materials, can efficiently permeate into the interior of base paper to perform an aminoketone condensation reaction with ketone compounds to form a stable condensation compound, and particularly has an excellent selective elimination effect on butanone, acetone and cyclohexanone, so that volatile ketone substances released in the transfer paper are fixed in the paper and are not volatilized or migrate to the external environment.
In one embodiment, the adjuvant is one or more of a defoamer, a preservative, and a leveling agent. Optionally, the leveling agent is one or more of BYK-331, BYK-354 and BYK-323 (produced by Germany Bick company), and can be used in the paper back coating emulsion to effectively improve the leveling property and uniformity of the paper back coating emulsion. Optionally, the defoamer is a mineral oil defoamer.
Optionally, the gram weight of the back coating 10 is 0.2-0.3 g/m2The thickness of the aluminum layer 40 is 35nm to 45 nm.
The method for manufacturing the transfer paper according to the embodiment of the present invention includes the following steps S10 to S30:
and S10, forming a transfer layer on the base film, aluminizing the transfer layer to form an aluminized layer, and forming a glue layer on the aluminized layer.
And S20, forming a back coating on one surface of the base paper, and then attaching the surface of the base paper, which is far away from the back coating, to the glue layer.
Specifically, the paper back coating emulsion is prepared by weighing the raw materials of the components in parts by mass, the base film is placed in an unreeling device, the paper back coating emulsion is coated by a coating roller, a back coating is formed after drying by a three-section oven, one side of the paper back coating emulsion which is not coated is directly attached to an undried glue layer by a composite roller without rolling, and then the paper back coating emulsion is dried by a five-section oven.
Alternatively, the method for preparing the paper back coating emulsion of an embodiment includes the following steps S21 to S23:
s21, weighing the raw materials according to the parts by weight.
S22, putting the water, the wax emulsion, the ketone removing additive and the auxiliary agent into a reaction kettle, and stirring for 0.2-1 hour at the temperature of 50-70 ℃ and at the rpm of 900-1000.
And S23, adding the rest raw materials into the reaction kettle, continuously stirring at 750-900 rpm for 0.5-2 hours, and filtering to obtain the paper back coating emulsion. Specifically, a 200-mesh filter screen is used for filtering.
And S30, stripping the base film, and forming a varnish layer on the transfer layer to obtain the transfer paper.
The preparation method of the transfer paper is simple in process and easy to realize, the obtained transfer paper has good water retention capacity and water absorption, the moisture of the base paper can be prevented from permeating out, the moisture condensed on the surface in the environment is absorbed, and the problem that the transfer paper is adhered to each other when being stacked is further improved, so that the transfer paper can be separated easily during subsequent processing and use, damage and scrapping caused by improper separation are avoided, the production efficiency is effectively improved, the production cost is reduced, and the market application prospect is wide.
The following are specific examples.
Example 1
Weighing the following raw materials in parts by weight: 12.6 parts of water, 13.98 parts of acrylic emulsion, 2.1 parts of wax emulsion, 1.8 parts of gamma-polyglutamic acid, 0.9 part of sodium alginate, 0.9 part of calcium chloride, 1.2 parts of ketone removing additive, 0.5 part of silk fibroin, 0.5 part of cattail wool fiber, 0.3 part of molybdenum disulfide, 0.2 part of cellulose ether, 0.2 part of starch ether, 0.03 part of defoaming agent, 0.03 part of preservative and 0.06 part of flatting agent (BYK-331). Putting water, wax emulsion, ketone removing additive and auxiliary agent into a reaction kettle, heating the reaction kettle to 55 ℃, starting a stirring device to stir at 1000rpm for 0.5 hour. And then putting the rest raw materials into the reaction kettle, continuously stirring at 800rpm for 1.5 hours, cooling, and filtering by using a 200-mesh filter screen to obtain the paper back coating emulsion.
And putting the base film into an unwinding device, coating a transfer coating by a coating roller, and drying by a five-section drying oven to form a transfer layer. And aluminizing the transfer layer to form an aluminized layer, and coating glue on the aluminized layer to form a glue layer. Putting base paper into an unwinding device, coating paper back coating emulsion on one surface of the base paper through a coating roller, drying the base paper in three-section drying ovens to form a back coating, directly enabling one surface of the base paper which is not coated with the paper back coating emulsion to be attached to an undried glue layer through a composite roller without winding, then drying the base paper in five-section drying ovens, finally stripping a base film, and coating varnish on a transfer layer to form a varnish layer, thus obtaining the transfer paper.
Example 2
The experimental procedure of example 2 was substantially the same as that of example 1 except that the raw material did not include silk fibroin and cattail wool fibers.
Example 3
The experimental procedure of example 3 was substantially the same as example 1 except that the feedstock did not include molybdenum disulfide.
Example 4
The experimental procedure of example 4 was essentially the same as in example 1, except that the starting material did not include cellulose ether and starch ether.
Comparative example 1
The experimental procedure of comparative example 1 was substantially the same as in example 1 except that the raw material did not include gamma-polyglutamic acid and sodium alginate.
Comparative example 2
The experimental procedure of comparative example 2 was substantially the same as in example 1 except that 10 parts of gamma-polyglutamic acid and 8 parts of sodium alginate were used.
Comparative example 3
The experimental procedure of comparative example 3 was substantially the same as in example 1 except that silk fibroin was 8 parts and typha fiber was 8 parts.
1000 sheets of the transfer papers of examples 1 to 4 and comparative examples 1 to 3 were stacked and left for 5 hours, and then the ratio of occurrence of adhesion was measured. The adhesion ratios of examples 1 to 4 were 0.1%, 0.8%, 0.5%, 0.6% and 0.3%, respectively, and the transfer paper had a dry surface without liquid and good flexibility, and the adhesion ratios of comparative examples 1 to 3 were 5.4%, 4.4% and 4.9%, respectively, and a wet surface. In conclusion, the transfer paper has better water retention capacity and water absorption, can prevent the moisture of the base paper from permeating, and simultaneously absorbs the moisture condensed on the surface in the environment, so that the problem of mutual adhesion when the transfer paper is placed in a stacked mode is improved, the transfer paper is easier to separate during subsequent processing and use, damage and scrap caused by improper separation are avoided, the production efficiency is effectively improved, and the production cost is reduced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The transfer paper is characterized by comprising a back coating layer, a raw paper layer, a glue layer, an aluminum coating layer, a transfer layer and a varnish layer which are sequentially stacked, wherein the back coating layer is made of paper back coating emulsion, and the paper back coating emulsion is mainly prepared from the following raw materials in parts by mass: 10-14 parts of water, 12-16 parts of acrylic emulsion, 1-4 parts of wax emulsion, 1-4 parts of gamma-polyglutamic acid, 0.5-1.5 parts of sodium alginate, 0.5-1 part of calcium chloride, 0.5-2 parts of ketone removing additive, 0.2-0.8 part of silk fibroin, 0.2-0.8 part of cattail wool fiber, 0.1-0.5 part of molybdenum disulfide, 0.1-0.3 part of cellulose ether, 0.1-0.3 part of starch ether and 0.03-0.2 part of auxiliary agent.
2. The transfer paper as recited in claim 1, wherein the silk fibroin is 0.5 parts by weight, and the cattail wool fiber is 0.5 parts by weight.
3. The transfer paper of claim 1 wherein the molybdenum disulfide is 0.3 parts by weight.
4. The transfer paper as claimed in claim 1, wherein the cellulose ether is 0.2 parts and the starch ether is 0.2 parts by mass.
5. A transfer paper as claimed in any one of claims 1 to 4 wherein the de-ketonizing additive is comprised of ethanolamine, dimethylbiguanide, propylenediamine and citric acid in a mass ratio of 2:3:1: 1.
6. A transfer paper as claimed in any one of claims 1 to 4, wherein the auxiliary agent is one or more of a defoaming agent, a preservative and a leveling agent.
7. A transfer paper as claimed in any one of claims 6, wherein the leveling agent is one or more of BYK-331, BYK-354 and BYK-323.
8. A transfer paper as claimed in any one of claims 1 to 4 wherein the back coating layer has a grammage of from 0.2 to 0.3g/m2。
9. The transfer paper according to any one of claims 1 to 4, wherein the thickness of the aluminum plated layer is 35nm to 45 nm.
10. A method for producing the transfer paper as claimed in any one of claims 1 to 9, comprising the steps of:
forming the transfer layer on a base film, aluminizing the transfer layer to form the aluminum-plated layer, and forming the glue layer on the aluminum-plated layer;
forming the back coating on one surface of the base paper, and then attaching the surface of the base paper, which is far away from the back coating, to the glue layer;
and stripping the base film, and forming the varnish layer on the transfer layer to obtain the transfer paper.
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CN109629328B (en) * 2018-12-13 2021-05-14 龙游盛邦包装材料有限公司 Production process and equipment of anti-seepage transfer paper
CN115029961A (en) * 2022-06-29 2022-09-09 东莞市益和纸制品有限公司 Environment-friendly pit paper and production process thereof

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