KR100553150B1 - A multi-layer laminated paper for printer and a method for preparing the same - Google Patents

Abstract

The present invention provides a stencil paper layer that serves as a porous support; A film layer can be perforated by a heat source, which is formed on any one surface of the waste paper layer; An adhesive layer positioned between the waste paper layer and the film layer to improve adhesion between the waste paper layer and the film layer; And it provides a multi-layer paper for printing, characterized in that it comprises a slip agent layer formed on the film layer.

The multi-layered paper for printing according to the present invention is excellent in the clarity of printed matter, enables high-volume high-speed printing, minimizes the occurrence of electrostatic phenomenon, curl phenomenon, and curling of the paper during printing, and has excellent print durability. There is an effect that a print can be obtained.

Printed Multilayer Paper

Description

A multi-layer laminated paper for printer and a method for preparing the same}

1 is a cross-sectional view of a multilayer paper for printing according to the present invention.

Description of the main parts of the drawing

1: slip agent layer 2: film layer

3: adhesive layer 4: paper layer

The present invention relates to a multi-layered base paper for printing and a manufacturing method thereof, and more particularly, a stencil paper layer serving as a porous support, a film layer formed on one surface of the waste paper layer, the waste paper layer and the The present invention relates to a multilayer paper for printing and a method of manufacturing the adhesive layer, which is disposed between the film layers and serves to improve the adhesion between the paper layer and the film layer, and a slip agent layer formed on the film layer.

In general, a printing method used in a printing apparatus such as a digital printer is a stencil that is perforated by receiving heat generated from a heat source such as a xenon flash lamp, a thermal head, or pulsed irradiation of a laser beam. The method of hanging on a printing machine to enable high-speed printing is used. As a base paper conventionally used in such a printing method, a base paper having a three-layer structure in which a film and a porous support are bonded by an adhesive, or a film and a porous support to heat The base paper of the two-layered structure formed by laminating by this was used.

Conventionally, single-layer films such as polyamide, polyethylene, polypropylene, flexible polyolefin, polyvinylidene chloride, polyvinyl chloride, and polyester-based films have been used as resins used for printing base films such as digital printers. As the porous support, thin paper, polyester silk paper, Teflon yarn and the like have been mainly used. Adhesives for bonding the film and the porous support include vinyl acetate resin, acrylic resin, urethane resin, polyester resin, and the like. This has been used.

However, in conventional multi-layered paper for printing, there is a problem of poor print sharpness due to the low thermal permeability of the film, or even when the print sharpness is improved, the film durability is low, causing defects to occur during the paper manufacturing process, or mass high-speed printing. Impossible, there was a problem that the durability of the produced paper itself is lowered.

In addition, due to the static electricity generated by the running friction between the paper layer and the film layer during the work process and the flexibility of the paper layer, failure of a heat source, generation of curling phenomenon, and rubber rollers existing in the inlet of a digital printer, etc. There was a problem that the phenomenon that the paper layer 4 is wound.

 Therefore, in the present invention, it is possible to obtain a printed product excellent in clarity of printed matter, high-volume high-speed printing, occurrence of electrostatic phenomenon, curl phenomenon, and curling of original paper during printing, and excellent printing durability. The present invention provides a multi-layered base paper for printing and a method of manufacturing the same.

The present invention to achieve the above technical problem,

A stencil paper layer composed of at least one selected from the group consisting of polyester fibers, polypropylene fibers, natural cellulose fibers, and regenerated cellulose fibers, and serving as a porous support;

At least one selected from the group consisting of polyamide resins, polyolefin resins, vinyl resins, polyester resins, acrylic resins, and polyurethane resins, comprising xenon flash lamps, thermal heads, laser beams and heat elements A film layer can be perforated by any one or more heat sources selected from the group, and formed on any one surface of the waste paper layer;

At least one selected from the group consisting of a vinyl resin, an acrylic resin, a polyurethane resin, a polyester resin, and an epoxy resin, and is disposed between the waste paper layer and the film layer and has an adhesive force between the waste paper layer and the film layer. An adhesive layer which serves to improve the quality; And

It is made of at least one selected from the group consisting of a silicone resin, a silicone copolymer and a silicone acrylic copolymer, and provides a multilayer paper for printing, comprising a slip agent layer formed on the film layer.

In addition, the present invention,

(a) a vinyl resin, an acrylic resin, a polyurethane resin, on any one surface of a film layer composed of any one or more selected from the group consisting of polyamide resins, polyolefin resins, vinyl resins, polyester resins, acrylic resins and polyurethane resins, Coating an adhesive layer made of at least one selected from the group consisting of a polyester resin and an epoxy resin, and preliminarily drying at a temperature of 20 ° C. to 90 ° C. for 0.1 second to 20 seconds;

(b) a paper layer made of at least one selected from the group consisting of polyester fibers, polypropylene fibers, natural cellulose fibers, and regenerated cellulose fibers, laminated on the adhesive layer and compressed, at a temperature of 30 ° C. to 90 ° C., First drying for 5 to 60 seconds; And

(c) a slip agent layer made of at least one selected from the group consisting of silicone resins, silicone copolymers and silicone acrylic copolymers is coated on the film layer, and at a temperature of 30 ° C. to 90 ° C. for 2 seconds to 0.5 seconds to 20 seconds. Tea drying;

It provides a method for producing a multilayer paper for printing comprising a.

Hereinafter, the present invention will be described in detail with reference to the drawings.

According to one embodiment of the present invention, a multi-layered base paper for printing is provided.

The paper layer 4 used in the printing multilayer paper of the present invention retains the ability to absorb and release ink to be printed and serves as a porous support, thereby absorbing ink when mounted on a drum such as a digital printer and through perforation. It will play a role of delivering ink. As the paper layer 4, one made of at least one selected from the group consisting of polyester fibers, polypropylene fibers, natural cellulose fibers, regenerated cellulose fibers, and polytetrafluoroethylene (PTFE) fibers may be used.

The thickness, basis weight and component content of the waste paper layer 4 have an important influence on the print clarity and durability of the multi-layered paper for printing, and preferably, the waste paper layer 4 has a thickness of 35 µm to 60 µm, Is from 8.5 g / m ² to 15 g / m ² , and 50 to 90% by weight of PET main fiber of 0.9 denier to 1.5 denier, 5 to 30% by weight of PET auxiliary fiber of 0.1 denier to 0.7 denier and 0.1 to 0.8 denier of natural E.g., 5 to 20% by weight of hold fibers.

When the thickness and basis weight of the waste paper layer 4 are less than the above ranges, the tensile force of the waste paper itself is weak so that the waste paper layer 4 cannot act as a support in a wet state, and when mounted on a drum such as a digital printer, etc. There is a problem that breakage of the paper is generated, and if it exceeds the above range, the ink absorption and discharge ability of the paper is reduced, the ink density of the printed matter is significantly reduced, the print sharpness and the resolution is lowered.

In addition, the paper layer 4 of the multilayer paper for printing according to the present invention is preferably formed in the form of a network cross link of PET main fibers, PET auxiliary fibers, and natural hemp fibers. . This network cross-link form maintains the porous structure of the waste paper layer, while maintaining a predetermined structural strength required for the waste paper layer.

The film layer 2 used in the printing multilayer paper of the present invention can be perforated by a heat source, and is formed on any one surface of the paper layer 4, so that ink escapes when mounted on a drum of a digital printer or the like. It becomes a passage. As the film layer 2, those made of any one or more selected from the group consisting of polyamide, polyolefin, vinyl-based resin, polyester, acrylic resin and polyurethane can be used.

Preferably, the film layer 2 is a biaxially stretched PET film layer, the thickness is 0.05 in consideration of the manufacturing characteristics of the film itself, durability of the film, thermal puncture sensitivity, adhesion to the head, print sharpness, etc. It is preferable that they are 5 micrometers-5 micrometers, melt temperature is 170 degreeC-230 degreeC, melt energy is 2cal / g-12cal / g, and surface roughness is 0.05 micrometer-0.1 micrometer.

In the case where the thickness of the film layer 2 is less than 0.05 µm, printing durability is reduced and printing clarity is inferior. When the thickness of the film layer 2 is exceeded, the amount of heat required for film drilling is increased and the punching characteristics of the film are lowered. As a result, there is a problem in that print sharpness is lowered.

If the melting temperature and the melting energy of the film layer 2 are less than the above range, the heat resistance stability of the film may be lowered, and the film may curl during the manufacturing process of the original paper or the storage of the original paper, and the printing may occur. The manufacturability of the image becomes insufficient, and if it exceeds the above range, the perforation sensitivity is lowered, which consumes an excessive amount of heat to melt the film, making the energy efficiency low and making it difficult to obtain a clear image.

In addition, the surface roughness of the film layer 2 prevents meandering, wrinkles, etc. of the film that may occur during adhesion of the paper layer 4 and the film layer 2, and consequently prevents curling of the printing paper. In order to minimize, it is preferable that it is 0.05 micrometer-0.1 micrometer.

The adhesive layer 3 used in the printing multilayer paper of the present invention is located between the paper layer 4 and the film layer 2 to serve to improve the adhesion between the paper layer 4 and the film layer 2. As the adhesive layer 3, a vinyl resin, an acrylic resin, a polyurethane resin, a polyester resin, and one made of one or more selected from the group consisting of an epoxy resin can be used.

Preferably, the adhesive layer 3 has a thickness of 0.01 μm to 1.0 μm. When the thickness of the adhesive layer 3 is less than 0.01 μm, the adhesive layer is thin during the perforation by a heat source, so that the depth of the perforation is deep, so that the printing clarity is excellent in printing, but the paper layer 4 and the film layer 2 Adhesion is weakened, and the possibility of unbonded parts at the time of adhesion increases. When the thickness of the adhesive layer 3 exceeds 1.0 µm, the adhesive strength is excellent and the probability of occurrence of non-laminated parts becomes low. However, when the adhesive layer 3 is not sufficiently punctured when punctured by a heat source, the ink in the drum is sufficiently drained. There is a problem that it is not possible and as a result the print sharpness is lowered.

On the other hand, the adhesive layer (3) 0.05 to 5 parts by weight of the dye selected from the group consisting of acid dyes, azoic dyes, basic dyes, direct dyes, disperse dyes, mordant dyes and sulfide dyes with respect to 100 parts by weight of the adhesive layer (3) , 5 to 25 parts by weight of an ammonium salt-containing charge solution, 0.1 to 10 parts by weight of a lithium ion-containing charge solution, and 0.1 to 10 parts by weight of an ammonium acrylate-containing charge solution.

The dye added to the adhesive layer 3 is for preventing the appearance of deterioration in product quality because the color of the base paper according to the present invention is close to white (whitening phenomenon), and the kind of dye mitigates this whitening phenomenon. There is no limitation as long as it is dark yellow or light yellow, and various paper dyes such as acid dyes, azoic dyes, basic dyes, direct dyes, disperse dyes, mordant dyes and sulfide dyes may be used. In addition, the content of the dye is preferably contained 0.05 to 5 parts by weight with respect to 100 parts by weight of the adhesive layer, when the content is less than the above range, it is not sufficient to prevent the whitening phenomenon, if the above range, There is a problem that the printability of the paper is reduced by blocking the porous structure of the waste paper layer 4.

The ammonium salt-containing charge solution, the lithium ion-containing charge solution, and the ammonium acrylate-containing charge solution added to the adhesive layer 3 may be formed by the waste paper layer 4 and the film layer 2 during the manufacturing process of the multilayer paper for printing according to the present invention. Friction occurs when driving on the guide roller, and is added to alleviate the static electricity generated. The content of the charge solution is 5 to 25 parts by weight of the ammonium salt-containing charge solution, 0.1 to lithium ion-containing charge solution to 100 parts by weight of the adhesive layer (3) in consideration of alleviation of the static electricity generation phenomenon and the printability of the base paper, respectively It is preferable that they are 10 weight part and 0.1-10 weight part of ammonium acrylate containing charging liquid.

The slip agent layer (1) used in the printing multilayer paper of the present invention is a polymer compound, which is formed on the film layer to give slip and heat resistance to the paper, and is composed of a silicone resin, a silicone copolymer, and a silicone acrylic copolymer. Any one or more selected from can be used.

Preferably, the thickness of the said slip agent layer 1 is 0.01 micrometer-1.0 micrometer. When the thickness of the slip agent layer 1 is less than 0.01 µm, the slip property and heat resistance required for the base paper cannot be sufficiently provided, and when the slip agent layer 1 exceeds 1.0 µm, the perforation of the film layer 2 cannot be sufficiently achieved. There is a problem that the print sharpness is lowered.

On the other hand, the slip agent layer 1, like the adhesive layer 3, 5 to 25 parts by weight of an ammonium salt-containing charge solution, and 0.1 to lithium ion-containing charge solution, based on 100 parts by weight of the slip agent layer 1 in order to alleviate the phenomenon of static electricity. It is preferable to further contain 10 weight part and 0.1-10 weight part of ammonium acrylate containing charging liquid.

According to another embodiment of the present invention, a method of manufacturing the multi-layered paper for printing is provided.

Method for producing a multi-layered paper for printing according to the present invention,

a) coating and predrying the adhesive layer 3 on the film layer 2; b) laminating a paper layer (1) on the adhesive layer (3), pressing, and first drying; And c) coating the slippering agent layer 1 on the film layer 2 and subjecting it to secondary drying.

The predrying of step a) takes place at a temperature of 20 ° C. to 90 ° C. for 0.1 to 20 seconds, which imparts a predetermined energy at which the solvent can evaporate at the surface of the coated adhesive layer 3. It will strengthen the adhesion.

b) compression is to prevent the problem that the unbonded portion may occur when the paper layer (4) and the film layer (2) does not maintain a completely flat state, the compression is conventional in the paper manufacturing process It can be carried out by a press machine or the like used, the pressing surface is to maintain a clean state free of impurities or scratches. After the compression, drying and curing of the coated adhesive layer 3 are induced by primary drying at a temperature of 30 ° C to 90 ° C for 5 seconds to 60 seconds.

In step c), the slip agent layer 1 is coated onto the film layer 2, and the slip agent layer 1 is dried and cured by secondary drying at a temperature of 30 ° C to 90 ° C for 0.5 to 20 seconds. Step is performed. Even when the slip agent layer 1 is coated, it should be kept clean so that impurities or scratches do not exist in the film layer 2 or the slip agent layer 1.

Preferably, the steps (a) to (c) are carried out continuously while moving in one direction or in both directions by a pair of rollers composed of a feed roller portion of the paper layer 4 and a winding roller portion of a multi-layered paper for printing. The tension between the feed roller portion and the take-up roller portion depends on the thickness or strength of the paper layer 4 and the thickness or strength of the finished multi-layered paper for printing, and the speed of process to be achieved. In the case of the present invention, it is preferable that they are 0.5 kgf to 15 kgf. The bidirectional movement of the roller portion also makes it possible to reverse winding the roller portion to correct it when curl occurs due to the difference in elongation between the film layer 2 and the paper layer 4. do.

This curling phenomenon is prominent when the surface tension is increased due to the friction between the film layer 2 and the guide roller. Therefore, performing the work in a working environment that can minimize the surface tension helps to alleviate the curling phenomenon. One of the main factors affecting surface tension is the moisture content of the surrounding atmosphere. Therefore, the step of coating the adhesive layer 3 of step (a) is preferably performed in a working environment of 5% to 65% relative humidity.

On the other hand, the multi-layered paper for printing according to the present invention may cause a phenomenon in which the paper layer 4 is wound on a rubber roller or the like existing in a printing paper inlet such as a digital printer due to the softness of the paper layer 4. In order to solve this problem, it is preferable to impart stiffness by impregnating a paper or printing multilayered paper with an impregnation solution containing a resin selected from the group consisting of acrylic resins, epoxy resins and polyurethane resins.

When using the multi-layered paper for printing according to the present invention, it is excellent in the clarity of the printed matter, high-speed high-volume printing, the occurrence of electrostatic phenomenon, curl phenomenon, and curling of the paper is minimized, and printing There is an effect that a printed matter with excellent durability can be obtained.

Claims (9)

A stencil paper layer composed of at least one selected from the group consisting of polyester fibers, polypropylene fibers, natural cellulose fibers, and regenerated cellulose fibers, and serving as a porous support; At least one selected from the group consisting of polyamide resins, polyolefin resins, vinyl resins, polyester resins, acrylic resins, and polyurethane resins, comprising xenon flash lamps, thermal heads, laser beams and heat elements A film layer can be perforated by any one or more heat sources selected from the group, and formed on any one surface of the waste paper layer; At least one selected from the group consisting of a vinyl resin, an acrylic resin, a polyurethane resin, a polyester resin, and an epoxy resin, and is disposed between the waste paper layer and the film layer and has an adhesive force between the waste paper layer and the film layer. An adhesive layer which serves to improve the quality; And It consists of at least one selected from the group consisting of a silicone resin, a silicone copolymer and a silicone acrylic copolymer, and comprises a slip agent layer formed on the film layer, The slip agent layer has a thickness of 0.01 μm to 1.0 μm, and is based on 100 parts by weight of the slip agent layer of 5 to 25 parts by weight of an ammonium salt-containing charge solution, 0.1 to 10 parts by weight of a lithium ion-containing charge solution, and 0.1 to 10 parts by weight of an ammonium acrylate-containing charge solution. It further comprises 10 parts by weight Printed multilayer paper. According to claim 1, wherein the waste paper layer has a thickness of 35 ㎛ to 60 ㎛, basis weight of 8.5g / m ² to 15g / m ² , 0.9 denier to 1.5 denier PET main fiber 50 to 90% by weight, 0.1 5 to 30% by weight of PET auxiliary fibers of denier to 0.7 denier and 5 to 20% by weight of natural hemp hold fibers of 0.1 denier to 0.8 denier. The biaxially oriented film according to claim 1, wherein the film layer has a thickness of 0.05 μm to 5 μm, a melting temperature of 170 ° C. to 230 ° C., a melting energy of 2 cal / g to 12 cal / g, and a surface roughness of 0.05 μm to 0.1 μm. Multi-layered paper for printing, characterized in that the PET film layer. The method of claim 1, wherein the adhesive layer has a thickness of 0.01 μm to 1.0 μm, and is selected from the group consisting of an acid dye, an azoic dye, a basic dye, a direct dye, a disperse dye, a mordant dye, and a sulfide dye with respect to 100 parts by weight of the adhesive layer. 0.05 to 5 parts by weight of the selected dye, 5 to 25 parts by weight of an electrolyte solution containing ammonium salt, 0.1 to 10 parts by weight of a lithium ion-containing charge solution, and 0.1 to 10 parts by weight of an ammonium acrylate-containing charge solution. Circle. delete (a) A vinyl resin, an acrylic resin, or a polyurethane on any one side of a film layer composed of any one or more selected from the group consisting of polyamide resins, polyolefin resins, vinyl resins, polyester resins, acrylic resins, and polyurethane resins. Coating an adhesive layer made of at least one selected from the group consisting of a resin, a polyester resin, and an epoxy resin, and preliminarily drying at a temperature of 20 ° C. to 90 ° C. for 0.1 seconds to 20 seconds; (b) a paper layer made of at least one selected from the group consisting of polyester fibers, polypropylene fibers, natural cellulose fibers, and regenerated cellulose fibers, laminated on the adhesive layer and compressed, at a temperature of 30 ° C. to 90 ° C., Primary drying for 5 seconds to 60 seconds; And (c) a slip agent layer made of at least one selected from the group consisting of silicone resins, silicone copolymers and silicone acrylic copolymers is coated on the film layer, and at a temperature of 30 ° C. to 90 ° C. for 2 seconds to 0.5 seconds to 20 seconds. Tea drying; Method for producing a multi-layered paper for printing comprising a. The method of claim 6, wherein steps (a) to (c) are performed in one direction or in both directions by a pair of rollers composed of a feed roller part of a paper layer and a winding roller part of a multi-layered paper for printing, and are continuously performed. Characterized in that the method. 8. The method of claim 7, wherein the tension between the feed roller portion and the take-up roller portion is 0.5kgf to 15kgf. 7. The method of claim 6, wherein the method is impregnated with a resin layer selected from the group consisting of an acrylic resin, an epoxy resin, and a urethane resin in the paper layer before step (a) and the printing multilayer paper after step (c). And impregnating the liquid.

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