KR20110021367A - Apparatus and method for manufacturing printing blanket - Google Patents

Abstract

PURPOSE: An apparatus and a method for manufacturing a printing blanket are provided to obtain the superior performance by securing the thickness uniformity less than 30um. CONSTITUTION: An apparatus for manufacturing a printing blanket includes a plate, a gantry, and a level foot. The plate includes a base film adhesive unit. The base film adhesive unit generates a negative pressure through fine holes on the surface of the plate. A coating unit is mounted at the gantry. The gantry horizontally moves on the plate. The level foot adjusts the height of the plate.

Description

Apparatus and method for manufacturing blankets for printing {APPARATUS AND METHOD FOR MANUFACTURING PRINTING BLANKET}

The present invention relates to a manufacturing apparatus and a manufacturing method using the same by coating the surface printing layer and the cushion layer integrally on both sides of the base film as a support layer to make a printing blanket.

In general, electronic devices such as liquid crystal display devices and semiconductor devices are fabricated by forming a pattern of numerous layers on a substrate. In order to form such a pattern, a photolithography process has been mainly used until now.

However, the photolithography process has to produce a predetermined pattern mask, and the chemical etching and stripping processes have to be repeated, thus making the manufacturing process complicated and generating a large amount of chemical waste harmful to the environment. This, in turn, leads to an increase in manufacturing costs, which reduces the competitiveness of the product.

A roll printing method using a printing roll has been proposed as a new pattern forming method for solving the disadvantages of the photolithography process.

There are various methods of roll printing, but it can be roughly divided into two types, gravure printing and reverse offset printing.

Gravure printing is a printing method that scrapes excess ink by printing ink on a concave plate and prints it. It is known as a method suitable for printing in various fields such as publishing, packaging, cellophane, vinyl, polyethylene, and the like. Research has been made to apply the gravure printing method to the fabrication of the active element or circuit pattern to be applied.

Since gravure printing transfers ink onto a substrate using a transfer roll, by using a transfer roll corresponding to the area of a desired display element, a pattern can be formed by one transfer even in a large-area display element. Will be. Such gravure printing not only forms an ink pattern for resist on a substrate, but also various patterns of the display device, for example, a TFT for gate lines and data lines, pixel electrodes, and capacitors connected to the TFT as well as a liquid crystal display device. It can be used to pattern metal patterns.

However, the blanket used for gravure printing is generally manufactured by casting a silicone-based resin into a rigid master mold. Thus, the blanket thus prepared is not only limited in manufacturing a uniform thickness, but also difficult to mass-produce on a pilot scale. have.

Thus, a reverse offset printing method is mainly employed for precise fine pattern formation.

For the prior art related to the reverse offset printing method and the printing apparatus, reference may be made to those of Documents 1 to 3, which are filed and published by the applicant of the present invention.

Document 1 is a printing roll; And a linear motor for moving in the front-rear direction while rotating the printing roll. The apparatus, by using a linear motor as a motor for driving printing rolls for coating and transfer, can minimize vibrations from the existing motors and provide a clean pattern without stains caused by vibrations.

Document 2 discloses a printing roll for a roll printing apparatus, and relates to a printing roll for a roll printing apparatus, characterized in that the cross-sectional area is reduced from the central region to both end regions.

Document 3 is a substrate; A substrate transfer device on which the substrate is mounted and which moves the substrate in one linear direction; A cliché disposed to face the plate surface of the substrate transfer device and having a pattern portion; A cliché on which the cliché is mounted so that the pattern portion of the cliché faces the plate surface of the substrate transfer device and moves the cliché in a straight line opposite the substrate transfer direction; A printing roll installed between the cliché feeder and the substrate feeder so as to be rotatable in the same direction as the cliché feed direction; And a coater for coating a coating on the printing roll, wherein the distance from the leading end of each of the substrate and the cliché to the central axis of the printing roll perpendicular to the linear direction is different from each other. At the initial positions of the substrate and the cliché spaced apart on both sides of the roll, the substrate and the cliché are linearly moved in opposite directions toward the printing roll on both sides of the printing roll simultaneously with the rotation of the printing roll. The coating is coated on the printing roll by the coater, and as the cliché passes over the rotating printing roll, the coating of the printing roll is transferred to the pattern portion of the cliché, and the printing roll is rotating on the printing roll. The process of transferring the coating pattern remaining on the printing roll to the substrate as the substrate passes by It discloses that on the roll printing device according to claim.

Document 1 KR 10-2008-0090890 (published) 2008.10.09.

Document 2 KR 10-2009-0020076 (published) 2009.02.26.

Document 3 KR 10-2009-0003883 (published) 2009.01.12.

All of the contents of the specification of Documents 1 to 3 are incorporated into the specification of the present invention as a description of the prior art of the present invention.

Fig. 1 shows a structural cross section of a blanket used for reverse offset printing. As shown in Figure 1, a conventional blanket is composed of a surface printing layer, a support layer, a cushion layer, may be further provided with a primer layer to secure the adhesion between the layers. The surface printing layer is a layer in which ink is directly buried and is transferred, and is mainly made of PDMS (Poly-Di-Methyl-Siloxane), and the support layer serves to support the surface printing layer and the cushion layer, and is mainly a PET film. Is produced by. In addition, the cushion layer, when the surface of the surface printing layer is not uniform, serves to compensate for such a thickness difference, and is mainly made of PDMS like the surface printing layer.

On the other hand, the prior art for producing a blanket for printing used in the reverse offset process will be described. 2A to 2B are diagrams schematically showing a conventional process of manufacturing a blanket for printing, which will be described with reference to this.

Figure 2a schematically shows a conventional blanket manufacturing process of the simplest form. As shown in FIG. 2A, a mold 50 having a recess 55 having a predetermined shape is prepared, the resin material 35 for the blanket is filled in the recess 55 of the mold 50, and then the pressurizing device 60 is provided. Press to make a blanket.

2B is a diagram schematically illustrating a process of manufacturing another conventional blanket. The process shown in FIG. 2B is invented to solve the problems of the technique shown in FIG. 2A and has been registered with the Korean Patent Office (registered KR 10-0617042). ).

As shown in FIG. 2B, a conventional blanket manufacturing apparatus includes a container 100, a preheating equipment 200, a rotary roll 300, and a curing equipment 400. The container 100 receives the blanket material 350 and serves to drop the received blanket material 350. The container 100 includes a body part 120 and a nozzle part 140, and includes a blanket material. An accommodating groove for accommodating the 350 is formed in the body portion 120, and a slit for connecting the accommodating groove to drop the blanket material 350 is formed in the nozzle portion 140.

Reverse offset printing is a very popular technique in terms of cost reduction and production speed in pattern formation, but a high quality blanket is required to obtain a precise pattern. That is, manufacturing a high quality blanket for printing is a very important technical problem in that the quality of the pattern may depend on the characteristics of the blanket.

In particular, since the reverse offset process is a micro process that must transfer a sub-micron size pattern over a large area, the surface of the blanket used therein is further required to be uniform over a large area. That is, the thickness uniformity of the blanket is particularly important for the blanket used in the printing process to coat the ink uniformly over the entire area and to transfer it to the cliché and the substrate.

The conventional blanket manufacturing apparatus and manufacturing method produce a blanket using the metal mold | die 50 and the pressurizing apparatus 60, as shown to FIG. 2A. In this case, the precision of the recess 55 or the pressure uniformity of the pressurizing device 60 may be degraded when the mold 50 is manufactured. In this case, the blanket may not be manufactured precisely in a desired shape. When the blanket is not manufactured precisely as described above, there is a fear that an unwanted pattern is formed in the process of transferring the to-be-printed material on the blanket.

Another conventional blanket manufacturing apparatus and manufacturing method is to form a blanket while dropping the blanket material from the container, as shown in Fig. 2B. In this case, unlike the prior art shown in Fig. 2A, there is an advantage that a uniform blanket can be produced without being affected by the precision of the mold or the pressure uniformity of the pressurizing device.

However, in the prior art of FIG. 2, when the viscosity of the blanket material is too high, the flowability is not good to secure thickness uniformity. On the contrary, when the viscosity is low, the flowability is too good to drop down the roll. As a result, there may be a risk of not being excellent in terms of improving the uniformity.

Accordingly, the present invention is to provide a printing blanket manufacturing apparatus that can produce a printing blanket having a very good thickness uniformity and a blanket manufacturing method using such a manufacturing apparatus.

The present invention has been made to solve the above problems of the prior art,

A surface plate having a base film adhesion means;

A gantry capable of mounting a coating unit and horizontally moving the surface of the surface plate; And

Level foot to adjust the height of the surface plate

It provides a printing blanket manufacturing apparatus comprising a.

In addition, in the present invention, the substrate film contact means provides a printing blanket manufacturing apparatus, characterized in that the vacuum device capable of generating a negative pressure through the micro-pores on the surface of the surface plate and the like.

In addition, in the present invention, the substrate film contact means provides a printing blanket manufacturing apparatus, characterized in that the winder roll is provided at both ends of the surface plate.

In addition, in the present invention, the coating unit provides a printing blanket manufacturing apparatus, characterized in that the baker applicator.

In addition, the present invention provides a printing blanket manufacturing apparatus, characterized in that the gap deviation precision of the baker applicator is less than 20 ㎛.

In addition, in the present invention, the thickness uniformity of the surface plate is 20 ㎛ or less, the surface roughness is 800 nm or less to provide a printing blanket manufacturing apparatus.

In addition, in the printing blanket manufacturing method comprising a surface printing layer, a support layer, and a cushion layer,

Using the printing blanket manufacturing apparatus of the present invention,

A first step of bringing the base film as a support layer into close contact with the surface plate having a horizontal level;

A second step of applying a silicone resin including hollow microspheres on one surface of the base film;

A third step of forming a cushion layer by curing the silicone resin at room temperature;

After inverting the base film, bringing the base film back into close contact with the surface plate;

A fifth step of applying liquid silicone resin on the other side of the base film; And

It provides a printing blanket manufacturing method comprising the step of sequentially curing the silicone resin at room temperature to form a surface printing layer.

In addition, in the manufacturing method of the present invention, the third step and the sixth step, a method of applying a vacuum sound pressure through the fine hole of the surface plate until the pot life; And after the pot life time by winding the base film on the winder roll to apply a tensile force to the base film, it provides a printing blanket manufacturing method characterized in that at room temperature while maintaining close contact between the base film and the surface plate.

In addition, in the production method of the present invention, the room temperature curing time provides a printing blanket manufacturing method, characterized in that one or more days.

In addition, the manufacturing method of the present invention provides a printing blanket manufacturing method, further comprising the step of removing dust of the base film before the first step.

In addition, the manufacturing method of the present invention, after the third step before the fourth step, provides a printing blanket manufacturing method comprising the step of forming a slip layer on the cushion layer.

In addition, in the manufacturing method of the present invention, the slip layer provides a printing blanket manufacturing method, characterized in that formed by coating a coating liquid containing a silicone oil, a siloxane substituted with hydrogen, and microparticles.

In addition, in the manufacturing method of the present invention, the coating solution is a printing blanket manufacturing method, characterized in that the coating is applied by spray coating, bar coating, or doctor blade.

Also in the manufacturing method of the present invention, after the first step before the second step; Or it provides a printing blanket manufacturing method further comprising the step of applying a primer after the fourth step before the fifth step.

In addition, in the production method of the present invention, the primer provides a printing blanket manufacturing method, characterized in that the silane coupling agent.

The printing blanket manufacturing apparatus and manufacturing method of this invention can provide the blanket of the outstanding performance that the thickness uniformity of the printing blanket is less than 30 micrometers.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

As used herein, the term 'thickness uniformity' means a thickness variation between a maximum thickness value and a minimum thickness value.

In FIG. 3, one example of an embodiment of the printing blanket manufacturing apparatus of the present invention is illustrated in a perspective view, which may be referred to below.

The present invention,

A surface plate having a base film adhesion means;

A gantry capable of mounting a coating unit and horizontally moving the surface of the surface plate; And

Level foot to adjust the height of the surface plate

It relates to a printing blanket manufacturing apparatus comprising a.

The base film contact means is a micro-hole on the surface surface of the surface plate and a vacuum device capable of generating a negative pressure through it; Or it may be a winder roll provided at both ends of the surface plate.

The surface plate refers to a solid block or table having a plane that is precisely and smoothly finished. Usually, it is used for the assembly and inspection of mechanical parts. There are various sizes, structures and precisions, and cast iron is common, but stone tablets are also made of stone.

The horizontal level of the surface plate is a very important factor. It is because thickness uniformity (meaning the maximum and minimum thickness variation of the thickness) of the blanket manufactured on such a surface plate can be ensured only when the surface plate is maintained horizontally. To this end, it is possible to further include a leveling device, which is well known in the art, such as a level bar that maintains horizontality on the surface plate, or a digital gauge whose level is measured as a numerical value. The horizontal level of the surface plate may be adjusted using the level foot.

In addition, the uniformity of the surface plate is also a very important factor. If the uniformity of the surface plate is not good, the uniformity of the blanket produced on such surface plate is also poor. Therefore, the uniformity of the surface plate is preferably at least 15 ~ 20 ㎛.

In addition, the surface roughness of the surface plate is also important. Surface roughness is a unit mainly showing roughness, because an appropriate degree of surface roughness can be provided to provide an appropriate slip property (ie, sliding property) for performing a blanket manufacturing process between the base film and the surface plate. Preferably, the surface roughness of the surface plate is 800 nm or less.

The surface plate has micropores on the surface. When the base film used as the support layer in the manufacturing process of the blanket is in close contact with the surface plate to increase the uniformity of the thickness of the surface printing layer, in order to ensure that the base film is in close contact with the surface plate is provided with micropores. In other words, if the base film is kept horizontal, placed on a surface plate with good uniformity, and a negative pressure is applied through the micropores, the adhesion between the surface plate and the base film can be greatly increased.

Preferably, the micropores are evenly distributed on the surface of the surface, and the density of the microholes on the surface of the surface can be appropriately increased or decreased according to the needs of those skilled in the art.

The size of the micropores may also be appropriately adjusted according to the needs of those skilled in the art and the density of the micropores, but if the size of the pores is too large, there is a possibility that uniform adhesion between the substrate and the surface may not occur. If too small, the sound pressure does not take as much as you want, there is a fear that the effect of securing adhesion. In general, a diameter of about 1 to 5 mm is appropriate.

The vacuum device for generating the negative pressure can be used conventionally without limitation.

The winder roll is a device for winding or unwinding the base film. The winder roll serves to apply an appropriate tensile force to the base film by pulling the ends of the base film at both ends.

As described above, the adhesion of the base film and the surface plate may be increased by applying a vacuum sound pressure through the micro holes provided in the surface plate. However, such a process may be a factor that lowers the uniformity of the surface printed layer when the same pressure does not occur in the entire base film. The thicker the base film used, the smaller the effect, but typically the thickness of the base film that can be used in the printing blanket, in particular the thickness of the PET film is limited to about 350 μm.

Therefore, preferably, in terms of thickness uniformity of the surface printed layer, it is more preferable to secure the adhesion between the base film and the surface plate without depending on the negative pressure through the micropores. In particular, since the pot life (the time when the viscosity increases twice the initial viscosity, which is widely used in the technical field related to the adhesive), the flowability of the composition including the silicone resin is weak. More attention is required.

However, even after the pot life, the base film serving as the surface plate and the support layer should be in close contact with each other as much as possible. After fixing both ends of the base film to the winder roll, respectively, applying a tensile force on both sides, securing adhesion between the surface plate and the base film You can do it.

The gantry is a support in the form of a vertical beam provided on both sides of the surface plate. The gantry may be provided at a position near the side of the surface plate and serves to fix the applicator and move it to coat the substrate surface.

The gantry moves along a rail provided in parallel with the surface plate, and may include a sub-motor for this purpose, but may be moved manually.

4 shows that the gantry is coupled with a baker applicator on the surface plate.

The coating unit is an independent coating unit used in the gap coating (gap coating) method.

Examples of the coating unit that can be used in the present invention include all coating units widely used in cap coating methods such as a baker applicator, a doctor blade, a bird applicator, and the like.

The coating unit may be used by being fixed to the gantry. That is, as shown in Figure 4, the baker applicator is fixed to the gantry, it is possible to coat the silicone resin or the like on the surface of the substrate while the gantry moves back and forth.

In particular, the baker applicator is more preferred as the coating unit of the present invention. The baker applicator is a device having square blocks on both sides of a cylinder, and is a bar-type coating member capable of adjusting the coating thickness by blocks on both sides. In FIG. 5, the baker applicator exemplarily shows how the silicone resin is coated.

In particular, in the present invention, it is preferable that the gap deviation precision of the baker applicator (the gap deviation precision means a thickness variation of both ends of the baker applicator and is similar in concept to 'uniformity') is less than 20 μm. This is because the precision of the applicator can directly affect the thickness uniformity of the blanket, as is the horizontal level of the surface plate.

The level-foot is provided below the frame. The level foot serves to adjust the height and horizontality of the surface plate. As long as the level foot is able to adjust height and height firmly and precisely, a level foot widely used in the art can be used without limitation, but in terms of thickness uniformity, it is preferable to use a level foot that can be adjusted very precisely in height and thickness. Do.

In addition, the present invention,

In the printing blanket manufacturing method comprising a surface printing layer, a support layer, and a cushion layer,

Using the above-described printing blanket manufacturing apparatus of the present invention,

A first step of bringing the base film as a support layer into close contact with the surface plate having a horizontal level;

A second step of applying a liquid silicone resin including hollow microspheres on one surface of the base film;

A third step of forming a cushion layer by curing the silicone resin at room temperature;

After inverting the base film, bringing the base film back into close contact with the surface plate;

A fifth step of applying liquid silicone resin on the other side of the base film; And

It relates to a printing blanket manufacturing method comprising the step of sequentially curing the silicone resin at room temperature to form a surface printing layer.

6 shows the manufacturing method of the present invention in a flow chart.

Securing adhesion between the base film and the surface plate is very important in securing the uniformity of the blanket for printing. However, as described above, when the negative pressure is not generated equally in the entire base film, it may be a factor to lower the uniformity of the surface printed layer, and the flowability of the silicone resin after the pot life has passed. Weaknesses require more attention.

 Therefore, the third step and the sixth step, using a method of applying a vacuum sound pressure through the minute hole of the surface plate until the pot life, and after the pot time wound the base film on the winder roll to close contact with the surface plate By the method of making it, it is preferable to carry out normal temperature hardening, maintaining close_contact | adherence between the said base film and the said surface plate.

In the manufacturing method of the present invention, the room temperature curing time is preferably at least 1 day, more preferably 3 days or more, but if the curing time is too long productivity is lowered by those skilled in the art You will have to adjust accordingly.

In the manufacturing method of the present invention, the method may further include removing dust of the base film before the first step. This is because removing dust helps to improve adhesion between the surface plate and the base film.

The method of removing dust on a base film can use the conventional technique, such as spraying high pressure air in the range which does not damage the said base film, without limitation.

In the manufacturing method of the present invention, after the third step before the fourth step, may further comprise the step of forming a slip layer on the cushion layer.

After the cushion layer is manufactured, when the film is inverted and the surface printed layer is to be manufactured, due to the sticky property of the silicone resin itself of the cushion layer, the cushion layer may not be uniformly adhered to the surface plate. This is because there is a possibility that the uniformity may not be secured.

The slip layer may be formed by applying a coating liquid including a silicone oil, a siloxane substituted at the end of hydrogen, and microparticles. The silicone oil in the coating solution may reduce the stickiness of the cushion layer, and the siloxane substituted at the end of hydrogen increases the bonding strength with the cushion layer. In addition, the coating liquid may include microparticles having a size that may give a moderate roughness to the slip layer and do not affect printing characteristics.

The coating solution may be applied by a method such as spray coating, bar coating, or doctor blade.

Hereinafter, the manufacturing method of the present invention will be described in more detail in the step of forming each layer of the blanket of the present invention.

First, a base film to be used for the printing blanket is prepared. As a base film, it is preferable to use the film with a small elasticity in order to suppress the expansion | contraction of the chain layer and cushion layer which are surfaces, and to improve the precision of printing. In particular, a film of a resin having a tensile modulus of at least 1000 MPa at room temperature, particularly 2000 to 5000 MPa, is suitable. Examples of such films include polyester films such as polyethylene terephthalate (PET), polycarbonate films, and the like.

Although the thickness of a base film is not restrict | limited, It is suitable that it is 0.1-0.5 mm, and 0.2-0.45 mm is preferable. If the thickness of the base film is less than this range, the effect of reinforcing and supporting the cushion layer or the surface printed layer by the base material may be insufficient.

The base film is brought into close contact with the surface plate (the contact method is as described above).

Next, a liquid mixture for forming a cushion layer provided on one side of the substrate is prepared. The mixture is prepared by blending the liquid silicone resin and the hollow microspheres, and mixing the hollow microspheres to be uniformly dispersed in the liquid silicone resin.

The hollow microspheres are not particularly limited and may be those disclosed in US Pat. No. 4,770,928 or the like. In particular, a homopolymer of polymerizable monomers such as polymerizable monomers such as vinylylidene chloride and (meth) acrylonitrile, or a shell containing two or more of these monomers may be shelled. Hollow microspheres in which a sieve is formed are preferable.

Although the particle diameter of a hollow microsphere is not specifically limited, In order to exhibit the effect of adjusting the phosphorus pressure by a cushion layer favorably, it is preferable that the average particle diameter is 20-200 micrometers, especially 40-150 micrometers.

The hollow microspheres are suitably blended in an amount of 1 to 30 parts by weight based on 100 parts by weight of the liquid silicone resin. If the blending ratio of the hollow microspheres is less than this range, the effect of adjusting the pressure by the cushion layer is not obtained. In addition, when the blending ratio of the hollow microspheres exceeds this range, the cushioning layer becomes soft, the printing accuracy is lowered, and the viscosity of the mixture is high, which makes it impossible to uniformly apply the mixture to a desired thickness.

Next, at the same time, the mixture is applied to one surface of the substrate, and the silicone resin containing the hollow microspheres is room temperature cured to form a cushion layer while the substrate is kept horizontal. In this way, when curing at room temperature, the mixture is uniformly formed and cured by its own weight, and at the same time, the hollow microspheres have a gradient in the thickness direction.

In order to apply the mixture to one surface of the substrate, a roll coater, bar coater, flow coater, gravure coater, spray, applicator, or the like may be used. In addition, the substrate is preferably in a state where the horizontal is completely maintained, it is preferable that the substrate film is in close contact with the horizontal object.

The silicone resin may be of a thermosetting type, a room temperature curing type, a catalyst curing type, or the like. After the mixture is applied, it is allowed to stand for a certain period of time in a room temperature environment (23 ± 3 ° C.) without heating and to be cured. This is preferable because the heat energy required for the curing step can be saved.

The thickness of the cushion layer is not particularly limited, but is preferably 0.05 to 2 mm, more preferably 0.3 to 1 mm. If the thickness of the cushion layer is less than this range, there may be a possibility that the pressure control effect of the cushion layer may not be sufficiently obtained. If the thickness of the cushion layer is exceeded, the thickness of the base film may be relatively small. There is concern.

Next, in order to form a surface printing layer on the other side of the base film, the base film is inverted and wound on a winder roll, and then brought into close contact with the surface plate (as described above for the adhesion method). The surface printing layer is a non-porous layer unlike the cushion layer. Such a surface printing layer can be formed by applying liquid silicone resin to the opposite surface of the substrate and curing the liquid silicone resin at room temperature while keeping the substrate horizontal.

The surface printing layer is a non-porous layer unlike the cushion layer. Such a surface printing layer can be formed by applying liquid silicone resin to the opposite surface of the substrate and curing the liquid silicone resin at room temperature while keeping the substrate horizontal.

Although the thickness of the said surface printing layer is not limited to this, 0.01-1.2 mm is preferable and it is more preferable that it is 0.1-1 mm. In order to form a surface printed layer having a thickness of less than this range, the application amount of the liquid silicone resin must be made in a very small amount, which is undesirable because there is a possibility that the leveling property is degraded and the uniformity of the thickness of the surface printed layer may be impaired. not. Moreover, when thickness exceeds this range, there exists a possibility that the effect of adjusting the pressure by a cushion layer may not fully be acquired.

It is preferable that the total thickness of the printing blanket which has each said layer is 0.7-3 mm, and it is more preferable that it is 0.9-2 mm. It is because it is necessary to match the total thickness of a blanket, in order to match the precision of a printing pattern, and to fully adhere to a printing roll without the tension of a blanket. When the total thickness of the blanket including the printing layer or the cushion layer is thicker than the thickness within the above range, the size and positional accuracy of the pattern are inferior, and adhesion to the printing roll is poor, so that precise printing is difficult. On the contrary, when it is thinner than the thickness within the above range, it is difficult to compensate for the thickness variation of the blanket (particularly when the cushion layer is thin) and it is difficult to control the swelling property of the ink (particularly when the thickness of the printing layer is thin).

A primer layer may be formed between the substrate and the layers to increase adhesion and integrity between the substrate and the layers. The primer layer may be formed in any thickness to suit the purpose without limitation. The material of a primer layer can be used as what contains a silane coupling agent with favorable affinity with silicone resin. When the cushion layer and the surface printing layer are formed without the primer layer, the surface of the substrate is physically or chemically treated to give affinity for the silicone resin and the mixture is applied to one side of the substrate to secure the adhesion to the substrate. It is desirable to.

EMBODIMENT OF THE INVENTION Hereinafter, the Example which produced the printing blanket actually as a manufacturing method of this invention using the manufacturing apparatus of this invention is demonstrated. The embodiments in the present specification are only for the detailed description of the present invention, and are not intended to limit the scope of the rights.

Example

[ Blanket  Produce]

A primer (X-33-312, manufactured by Shintsu) was coated on a 350 μm-thick PET film to a thickness of 10 μm, and then volatilized at room temperature for about 30 minutes.

After the PET film was brought into close contact with the surface plate, 100 parts by weight of liquid silicone resin (mixed about 1 wt% of EXPANCEL's 920DET 80 d20 particles to KE1606 of Shintetsu) and 10 parts by weight of a curing agent were mixed with a baker applicator. After coating to a thickness of about 900 ㎛, it was cured at room temperature for about 3 days. Thereafter, the slip coating solution mixed with 30 wt% silica particles was coated to have a wet thickness of about 30 to 40 μm, and the resultant was cured at room temperature for about 1 day to form a slip layer and a cushion layer.

After the cushion layer production was completed, the film was inverted and brought into close contact with the surface plate again, and the same primer was coated with 10 µm and volatilized at room temperature for about 30 minutes.

After adding 10 parts by weight of a curing agent to 100 parts by weight of liquid silicone resin (KE1606 manufactured by Shintsu), it was coated on the PET film with a thickness of about 400 μm using a baker applicator, and the surface printed layer was cured at room temperature for about 3 days or more. Was completed.

[ Blanket  Performance measurement result]

* Uniformity measurement result

The prepared blanket for printing had a thickness uniformity percentage of less than 1%. The thickness was measured using a thickness measuring device of the LVDT (The linear variable differential transformer) method, the error is less than 5㎛ maximum. Thickness uniformity percentage was defined as Equation 1 below.

* Cliché Off-Process Print Results

Using the manufactured blanket for printing, it was mounted on a printing roll of a reverse off set printer, and the blanket for printing was uniformly in close contact with the slip coating layer.

In addition, in this printing process, a cliché-off process having a line width of 3 to 7 μm and a step of 3 to 4 μm was performed, and a set process was performed on a printed board. The printing result was able to apply the pressure up to 30 ㎛, the printing result was also good.

Based on the above description with reference to the drawings and described in detail with reference to the embodiments, those skilled in the art will be able to perform a variety of applications and modifications within the scope of the present invention.

1 is a structural cross-sectional view of a blanket used for reverse offset printing.

2A to 2B are schematic diagrams showing a step of manufacturing a conventional blanket.

Figure 3 is a perspective view of the embodiment of the printing blanket manufacturing apparatus of the present invention.

Figure 4 is a partial view showing the gantry of the manufacturing apparatus of the present invention.

5 is a schematic diagram showing an example of a baker applicator coating a silicone resin.

6 is a flowchart illustrating a manufacturing method of the present invention.

Claims (15)

A surface plate having a base film adhesion means; A gantry capable of mounting a coating unit and horizontally moving the surface of the surface plate; And Level foot to adjust the height of the surface plate Printing blanket manufacturing apparatus comprising a. The printing blanket manufacturing apparatus according to claim 1, wherein the base film contacting means is a vacuum device capable of generating a negative pressure through the micropores on the surface of the surface plate. The printing blanket manufacturing apparatus according to claim 1, wherein the base film contacting means is a winder roll provided at both ends of the surface plate. The apparatus of claim 1, wherein the coating unit is a baker applicator. The apparatus of claim 4, wherein the gap deviation precision of the baker applicator is less than 20 μm. A printing blanket manufacturing apparatus according to claim 1, wherein the thickness uniformity of the surface plate is 20 µm or less, and the surface roughness is 800 nm or less. In the printing blanket manufacturing method comprising a surface printing layer, a support layer, and a cushion layer, Using the printing blanket manufacturing apparatus of any one of claims 1 to 6, A first step of bringing the base film as a support layer into close contact with the surface plate having a horizontal level; A second step of applying a silicone resin including hollow microspheres on one surface of the base film; A third step of forming a cushion layer by curing the silicone resin at room temperature; After inverting the base film, bringing the base film back into close contact with the surface plate; A fifth step of applying liquid silicone resin on the other side of the base film; And And a sixth step of sequentially curing the silicone resin to form a surface printing layer. 8. The method of claim 7, wherein the third and sixth steps comprise: applying a vacuum sound pressure through the micropores of the plate until the pot life; And a method of applying a tensile force to the base film by winding the base film on a winder roll after the pot life, and maintaining the adhesion between the base film and the surface plate at room temperature and curing the printing blanket manufacturing method. 8. The method of claim 7, wherein the room temperature curing time is at least one day. 8. The method of claim 7 further comprising the step of removing dust from the base film prior to the first step. 8. The method of claim 7, further comprising forming a slip layer on the cushion layer after the third step and before the fourth step. 12. The method of claim 11, wherein the slip layer is formed by applying a coating liquid containing a silicone oil, a siloxane substituted at the end of hydrogen, and microparticles. 13. The method of claim 12, wherein the coating liquid is applied by spray coating, bar coating, or doctor blade. 8. The method of claim 7, further comprising: after the first step before the second step; Or after the fourth step and before the fifth step, applying the primer. 15. The method of claim 14 wherein the primer is a silane coupling agent.

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