KR20160037815A

KR20160037815A - Blanket for printing and manufacturing the same

Info

Publication number: KR20160037815A
Application number: KR1020150137892A
Authority: KR
Inventors: 명지은; 김주연; 이승헌; 손용구; 구범모
Original assignee: 주식회사 엘지화학
Priority date: 2014-09-29
Filing date: 2015-09-30
Publication date: 2016-04-06

Abstract

The disclosure includes: a substrate; A silicon-based resin layer provided on the substrate; And a pressure-sensitive adhesive film provided between the base material and the silicone-based resin layer, wherein the base material and the silicone-based resin layer are bonded to each other via an adhesive film, and a method for producing the same.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a blanket for printing,

The present disclosure relates to a printing blanket and a method of making the same.

2. Description of the Related Art Generally, electronic devices such as a liquid crystal display device and a semiconductor device are fabricated by forming patterns of numerous layers on a substrate. In order to form such a pattern, a photolithography process has been mainly used so far. However, in the photolithography process, a predetermined pattern mask must be prepared, chemical etching, and stripping processes must be repeated. Therefore, the fabrication process is complicated, and a large amount of chemical waste harmful to the environment is generated. This leads to an increase in production 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 shortcomings of such a photolithography process.

There are various methods of roll printing, but roughly classified into gravure printing and reverse offset printing.

Gravure printing is a printing method in which extra ink is scraped off by printing ink on a concave plate and is known as a method suitable for printing in various fields such as printing, packaging, cellophane, vinyl, and polyethylene. Studies have been conducted to apply the gravure printing method to the production of active elements or circuit patterns to be applied. Since gravure printing transfers an ink onto a substrate using a transfer roll, by using a transfer roll corresponding to a desired display element area, even in the case of a large-area display element, a pattern can be formed by one transfer . Such gravure printing not only forms an ink pattern for a resist on a substrate but also forms various patterns of a display element, for example, in the case of a liquid crystal display element, a gate line and a data line connected to the TFT, Can be used to pattern metal patterns for capacitors.

However, since the blanket used for gravure printing is manufactured by casting a silicone resin to a hard master mold, the blanket thus manufactured has a limit to be manufactured so as to have a uniform thickness, and it is also difficult to mass-produce it on a pilot scale have. Therefore, a reverse offset printing method is mainly employed for precise fine pattern formation.

The blanket used in the present printing process is generally prepared by coating on a flexible substrate, and due to the low adhesion of the silicone resin to the substrate, a step of treating the primer or the additional adhesive component is added.

However, the volume expansion of the silicone resin occurs due to the organic solvent accumulated in the blanket during the continuous printing, and the peeling phenomenon occurs between the two interfaces due to the difference in the expansion ratio with the lower substrate. When such a phenomenon occurs, coating unevenness of the blanket and printing failure phenomenon appear, and this is a main cause of lowering the life of the blanket.

The reverse offset printing method is a technique that is costly in terms of cost reduction and improved production speed in pattern formation. However, in order to obtain a precise pattern, research on techniques for improving adhesion between a silicone resin and a substrate is required have.

Korean Patent Publication No. 10-2008-0090890 Korean Patent Publication No. 10-2009-0020076 Korean Patent Publication No. 10-2009-0003883

The present disclosure provides a printing blanket and a method of making the same.

One embodiment of the present disclosure includes a substrate; A silicon-based resin layer provided on the substrate; And a pressure-sensitive adhesive film provided between the substrate and the silicone-based resin layer, wherein the substrate and the silicone-based resin layer are bonded via the pressure-sensitive adhesive film.

In addition, one embodiment of the present disclosure includes a method comprising: laminating an adhesive film on a substrate; And a step of forming a silicone resin layer on the adhesive film.

An embodiment of the present disclosure also includes a blanket shim; And a blanket provided on an outer surface of the blanket shim, wherein the blanket is the printing blanket.

Another embodiment of the present disclosure relates to the printing roll; A coater for coating the surface of the blanket with ink; And a cliche.

One embodiment of the present invention provides a printing method using the printing apparatus.

The printing blanket according to one embodiment of the present disclosure exhibits improved adhesion with the substrate of the silicone-based resin layer. Moreover, the improved adhesion is advantageous in that it can be selectively applied to the part where adhesion characteristics are required.

In addition, the printing blanket according to one embodiment of the present invention is excellent in terms of life and durability, and has the advantage that a continuous printing process is possible.

In addition, the manufacturing method of the printing blanket according to the embodiment of the present invention does not require a separate heat drying step, and thus the process efficiency is excellent.

1 is a cross-sectional view of a printing blanket according to one embodiment of the present disclosure;
2 is a microscope image of a cross section of a printing blanket according to one embodiment of the present disclosure;
3 is a view showing a printing blanket according to an embodiment of the present invention attached to a blanket core. 3 is a cross-sectional view of a printing roll according to an embodiment of the present invention.
4 is a schematic view of a blanket manufacturing step according to Embodiment 1 of the present invention.
FIG. 5 is a diagram illustrating a blanket manufacturing step according to Comparative Example 1 of the present invention. FIG.

When a member is referred to herein as being "on " another member, it includes not only a member in contact with another member but also another member between the two members.

Whenever a component is referred to as "comprising ", it is to be understood that the component may include other components as well, without departing from the scope of the present invention.

Hereinafter, the present invention will be described in more detail.

One embodiment of the present disclosure includes a substrate; A silicon-based resin layer provided on the substrate; And an adhesive film provided between the substrate and the silicon-based resin layer, wherein the substrate and the silicon-based resin layer are bonded via an adhesive film.

In this specification, the substrate may refer to a film located between the blanket core and the silicone-based resin layer, referring to Fig.

In the present specification, the substrate serves as a support layer, and as the substrate, it is preferable to use a film having small stretchability in order to suppress elongation and shrinkage of the surface print layer and to improve printing precision. According to one embodiment of the present invention, the substrate may be a film of a resin having a tensile modulus at room temperature of 1,000 MPa or more, specifically, 2,000 MPa to 5,000 MPa.

According to one embodiment of the present disclosure, the substrate may be a polyester film such as polyethylene terephthalate (PET) or a polycarbonate film.

According to one embodiment of the present disclosure, the thickness of the substrate may be 0.1 mm or more and 0.5 mm or less, and specifically 0.2 mm or more and 0.45 mm or less. However, it is not limited thereto. If the thickness of the substrate is not within the above range and is too thin, the role of the substrate as a support layer may be insufficient. Specifically, the effect of reinforcing and supporting the surface print layer by the substrate may be insufficient.

According to one embodiment of the present disclosure, the substrate may have the form of a film. The base film may be a plastic film.

According to the printing blanket according to one embodiment of the present specification, the adhesive property between the silicone-based resin layer and the substrate can be improved by applying an adhesive film between the silicone-based resin layer and the substrate. In other words, the above-mentioned pressure-sensitive adhesive film can serve to enhance the adhesion between the substrate and the silicone-based resin layer used for producing the printing blanket.

The blanket for printing according to an embodiment of the present invention can selectively enhance the adhesion property only to a desired portion of the blanket according to one embodiment of the present invention. The blanket for printing according to one embodiment of the present invention can improve adhesion properties selectively without changing the composition and / or physical properties of the silicone resin layer. There is an advantage that only the attachment characteristics can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows the structure of a printing blanket section according to one embodiment of the present disclosure. Specifically, the adhesive film 2 is provided between the substrate 3 and the silicone-based resin layer 1. 1 is for illustrating the structure of a printing blanket according to an embodiment of the present invention, and the thickness ratio thereof may be different from that shown in Fig.

2 is a micrographic image of a cross-sectional view of a print blanket according to one embodiment of the present disclosure; Referring to FIG. 2, it can be seen that the printing blanket according to one embodiment of the present invention is composed of a substrate, an adhesive film, and a silicone-based resin layer. However, the thickness of each component is not limited to the numerical values shown in Fig.

3 shows the structure of a printing roll cross section according to one embodiment of the present invention. Specifically, the substrate 3 is provided on the surface of the blanket core 4, the adhesive film 2 is adhered to the surface of the substrate 3, and the silicon-based resin layer 1 ) Are provided. Fig. 3 is one example showing the configuration of the printing roll according to one embodiment of the present invention, and the thickness ratio thereof may be different from that shown in Fig.

According to one embodiment of the present specification, the adhesive film may be attached to a part of the surface of the silicon-based resin layer that faces the base material.

According to one embodiment of the present specification, the adhesive film may be attached to the entire surface of the silicon-based resin layer that faces the base material.

According to one embodiment of the present specification, the adhesive film may be attached to a part of the opposite surface of the silicon-based resin layer of the substrate.

According to one embodiment of the present disclosure, the adhesive film may be attached to the entire opposite surface of the silicon-based resin layer of the substrate.

According to one embodiment of the present invention, the pressure-sensitive adhesive film may include at least one selected from the group consisting of an acrylic type, a urethane type, and an epoxy type.

According to one embodiment of the present invention, the thickness of the adhesive film may be 20 μm or more and 200 μm or less.

According to one embodiment of the present invention, the thickness of the silicon-based resin layer may be about 400 탆.

According to another embodiment, the thickness ratio of the silicon-based resin layer to the pressure-sensitive adhesive film is 5: 100 to 50: 100.

According to one embodiment of the present invention, the adhesion between the substrate and the silicone-based resin layer is 500 gf / inch to 1100 gf / inch.

According to one embodiment of the present invention, the adhesion between the base material and the silicone-based resin layer is 600 gf / inch to 1100 gf / inch.

According to one embodiment of the present invention, the adhesion between the substrate and the silicone-based resin layer is 700 gf / inch to 1100 gf / inch.

According to one embodiment of the present invention, the adhesion between the substrate and the silicone-based resin layer is 800 gf / inch to 1100 gf / inch.

According to one embodiment of the present invention, the adhesive force between the substrate and the silicone-based resin layer is 900 gf / inch to 1100 gf / inch.

In the present specification, the adhesive force is a value measured by a 180 degree peel test method. The measurement equipment was TA.XT.PLUS Texture Analyzer, and the adhesive force was an average value calculated after 5 measurements. Specifically, the adhesive force was measured by making a measurement specimen having a size of 2.54 cm (1 inch) * 15 cm. Since the thickness of the silicone resin layer and the pressure-sensitive adhesive film are uniform during the preparation of the measurement specimen, it can be regarded as the same as the total adhesion force. Further, as described above, when measuring the adhesive force, various parts of the sample are cut and measured, and the average value is calculated. Since the measured value is also measured constantly, it can be regarded as the total adhesive force.

In the present specification, the adhesive force means the adhesive force between the substrate and the adhesive film and / or the adhesive force between the adhesive film and the silicone resin layer.

According to one embodiment of the present invention, the silicone resin may be a polymer including silicon. Specifically, the silicone resin may exhibit properties of a thermosetting property, a room temperature setting property and a catalyst setting property.

According to one embodiment of the present invention, the silicone-based resin may be those known in the art, and more specifically polydimethylsiloxane (PDMS) may be used.

According to one embodiment of the present invention, the silicon-based resin layer may be a polydimethylsiloxane (PDMS) layer.

According to one embodiment of the present invention, the silicon-based resin layer may further include a catalyst, a cross-linker, and an inhibitor.

According to one embodiment of the present invention, the hardness of the silicon-based resin layer may be 20 or more and 60 or less.

The hardness value means a Shore A hardness value. The Shore A hardness is a method of measuring the rubber hardness in general, and conforms to JIS K 6301 (Spring Type A) standard, and the test spring load is 539 to 8,379 mN.

According to one embodiment of the present disclosure, the printing blanket may be for offset printing.

One embodiment of the present disclosure includes the steps of: laminating an adhesive film on the substrate; And a step of forming a silicone resin layer on the adhesive film.

The method for producing a printing blanket according to the present invention may be any method known in the art, except for the step of applying an adhesive film between the substrate and the silicone-based resin layer.

Generally, the pressure-sensitive adhesive used is toluene, xylene or the like as a solvent for dissolving the pressure-sensitive adhesive, and the solvent has a high boiling point, so that a heat drying process is additionally required. However, the method for manufacturing a printing blanket according to one embodiment of the present invention does not require an additional step such as a heat drying process by applying an adhesive film other than a pressure-sensitive adhesive. Thus, the printing blanket according to one embodiment of the present disclosure has excellent process efficiency.

According to one embodiment of the present invention, the step of forming the silicon-based resin layer may be performed by a gap coating method.

The gap coating method is a method using a comma-type blade. The method includes applying a composition containing a silicone resin to be coated on the upper end of the blade in a traveling direction of the blade, positioning the blade at a predetermined distance (gap) The blade is moved in the horizontal direction so that the coating is uniformly carried out in the width direction in the traveling direction on the support layer. When the gap coating method is applied, since coating is performed with a certain gap, stable coating is possible, and reproducible results can be obtained.

According to one embodiment of the present disclosure, the manufacturing method may further include fixing the substrate. Specifically, it may further include a step of fixing the substrate on a stage having a vacuum adsorption function.

According to one embodiment of the present disclosure, the method may further include the step of removing dust on the substrate before or after the step of fixing the substrate.

According to an embodiment of the present invention, the manufacturing method may further include the step of laminating the silicon-based resin layer.

According to one embodiment of the present disclosure, the method of manufacturing the printing blanket may further include heating or curing by UV. Specifically, after the step of forming the silicone-based resin layer, the step of curing the silicone-based resin layer by heating or UV may be further included.

According to one embodiment of the present disclosure, the curing step may be performed at room temperature.

According to another embodiment, the method may further include a step of inspecting and cutting after the curing step.

According to one embodiment of the present disclosure, the method of manufacturing the blanket for printing may be a method of manufacturing the blanket for offset printing.

One embodiment of the present disclosure relates to a blanket shim; And a blanket provided on an outer surface of the blanket shim, wherein the blanket is a blanket for printing according to the above-described one embodiment.

Another embodiment of the present disclosure is a printing roll according to the above-described one embodiment; A coater for coating the surface of the blanket with ink; And a cliche.

According to one embodiment of the present disclosure, the printing apparatus may be any element as long as the elements of the printing apparatus are known in the art, except that they include the printing blanket according to the above-described one embodiment .

The printing method may be any method known in the art, except that a printing apparatus including a printing blanket according to one embodiment of the present disclosure is used.

Hereinafter, the present invention will be described in detail by way of examples with reference to the drawings. However, the embodiments according to the present disclosure can be modified in various other forms, and the scope of the present specification is not construed as being limited to the embodiments described below. Embodiments of the present disclosure are provided to more fully describe the present disclosure to those of ordinary skill in the art.

[Example 1]

After removing the dust from the substrate in the form of a film, the film was fixed on a stage having a vacuum adsorption function. After laminating an adhesive film on a fixed film, a mixed solution of PDMS, which is a silicone resin, was prepared and defoamed, and the solution was coated on the adhesive film and cured. After the surface visual inspection and the foreign matter removal process, finally, a printing blanket was produced.

The blanket production steps of Example 1 are schematically shown in FIG.

[Comparative Example 1]

A printing blanket was prepared in the same manner as in Example 1 except that a step of coating and drying a primer including a silane coupling agent was performed in place of the step of laminating the adhesive film.

5 is a schematic representation of the blanket production step of Comparative Example 1;

Table 1 below shows the results of a 180 ° peel test in which the adhesion between the blanket produced by Example 1 and the blanket produced by Comparative Example 1 were compared. The measurement equipment was TA.XT.PLUS Texture Analyzer, and the following values were calculated after 5 measurements.

Processing method Force (gf / inch) Example 1 Adhesive film lamination 994 Comparative Example 1 Primer coating and drying 348

As can be seen from the above Table 1, it can be seen that the blanket manufactured by applying the adhesive film has a higher adhesive force than the blanket prepared by adding a separate primer. Thus, it can be seen that the printing blanket according to one embodiment of the present disclosure exhibits improved adhesion properties.

1: a silicon-based resin layer
2: Adhesive film
3: substrate
4: blanket core

Claims

materials;
A silicon-based resin layer provided on the substrate; And
And an adhesive film provided between the base material and the silicone resin layer,
Wherein the base material and the silicon-based resin layer are bonded to each other through the adhesive film.

The method according to claim 1,
Wherein the adhesive film is attached to a part of the surface of the silicon-based resin layer which faces the base material.

The method according to claim 1,
Wherein the adhesive film is adhered to a part of the surface of the substrate opposite to the silicon-based resin layer.

The method according to claim 1,
Wherein the pressure-sensitive adhesive film comprises at least one selected from the group consisting of an acrylic type, a urethane type, and an epoxy type.

The method according to claim 1,
Wherein the thickness of the adhesive film is 20 占 퐉 or more and 200 占 퐉 or less.

The method according to claim 1,
Wherein the thickness ratio of the silicon-based resin layer to the pressure-sensitive adhesive film is 5: 100 to 50: 100.

The method according to claim 1,
Wherein the adhesion between the base material and the silicone resin layer is 500 gf / inch to 1100 gf / inch.

The method according to claim 1,
Wherein the adhesion between the substrate and the silicone resin layer is from 700 gf / inch to 1100 gf / inch.

The method according to claim 1,
Wherein the silicon-based resin layer is a polydimethylsiloxane (PDMS) layer.

The method according to claim 1,
Wherein the hardness of the silicone-based resin layer is 20 or more and 60 or less.

The method according to claim 1,
Characterized in that the printing blanket is for offset printing.

Laminating an adhesive film on a substrate; And
A method for manufacturing a printing blanket according to any one of claims 1 to 11, comprising the step of forming a silicone resin layer on the adhesive film.

The method of claim 12,
Further comprising fixing the substrate prior to the step of lamination. &Lt; RTI ID = 0.0 > 11. < / RTI >

The method of claim 12,
Wherein the step of forming the silicon-based resin layer is performed by a gap coating method.

The method of claim 12,
Further comprising a step of curing the silicone-based resin layer by heating or UV after the step of forming the silicone-based resin layer.

The method of claim 12,
Wherein the printing blanket is an offset printing blanket.

Blanket shim; And a blanket provided on an outer surface of the blanket shim, wherein the blanket is the printing blanket of any one of claims 1-11.

A printing roll according to claim 17;
A coater for coating the surface of the blanket with ink; And
And a cliche.

A printing method using the printing apparatus according to claim 18.