JP2004067938A - Addition curing type silicone rubber composition,blanket for offset printing, offset printing method and offset printed artticle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a silicone rubber composition suitable to produce a blanket having constant ink acceptable stability and excellent printing resistance, a blanket for the same, a printing method by the blanket and also a thick film. <P>SOLUTION: The addition curing type silicone rubber composition comprises the following components A to E;the component A comprising 60-20 wt pts. of a straight chained organopolysiloxane containing at least two vinyl groups binding to a silicon atom per molecule, 90 % or more of the total organic groups including an alkenyl group of the same being a methyl group, the component B comprising 40-80 wt pts. of a resinous copolymer containing as the main ingredients R<SB>3</SB>SiO<SB>1/2</SB>unit (in which R is an unsubstituted or substituted monovalent hydrocarbon group) and SiO<SB>2</SB>unit, a molar ratio of [R<SB>3</SB>SiO<SB>1/2</SB>/SiO<SB>2</SB>] being 0.5-1.2<SB>,</SB>and also containing at least two vinyl groups per molecule, the component C comprising an organo hydrogenpolysiloxane, the component D comprising an inorganic filler and the component E comprising a reaction catalyst. <P>COPYRIGHT: (C)2004,JPO

Description

【００５６】
上記組成の導電性インキの粘度は、２３℃、ズリ速度１０（１／Ｓ）において、約７０００Ｐの高粘度であった。上記組成の導電性インキの有機成分は、焼成により除去可能である。
【００５７】
印刷
図３及び図４に示す平凹版オフセット印刷機（（株）紅羊社製作所製）を用いて、２．８ｍｍ厚×４２インチサイズのガラス基板上にウエットオンウエットで重ねて印刷を行った。印刷条件は、印刷版へのインキを詰める充填速度及びインキをガラス基板へ転移する転移速度を各５００ｍｍ／秒とし、印刷版からブランケットに受ける受理速度を５０ｍｍ／秒とし、印刷版及びガラス印圧を０．２ｍｍ、印刷版及びガラス温度を２０℃とし、印刷パターンとしてＬ／Ｓ＝１００／１００μ（但し、Ｌは印刷部分、Ｓはスペースを意味する）とした。使用するブランケットは前記工程で得られたものを使用した。印刷版は、水なし版で版溝が４μｍのＤＧ２（商品名：東レ（株）製）を使用した。
【００５８】
印刷後、２００℃で１０分間乾燥し、ピーク温度６００℃で焼成を行い、ＰＤＰ用アドレス電極を形成した。得られた電極は、線幅１００±５μ、厚み２±１μであった。得られた印刷物について観察したところ、細線の乱れ（うねり）の発生や、細線の断線の発生が無く、面内バラツキの小さいものが形成でき、２０００枚以上の安定した印刷を確認した。
【００５９】
その結果を下記の表１に示す。
【００６０】
【表１】

【００６１】
【発明の効果】
本発明の付加硬化型シリコーンゴム組成物を用いて形成したオフセット印刷用ブランケットは、印刷を繰返して続けても、インキの受理性が常に安定し、耐刷性に優れている。
【図面の簡単な説明】
【図１】本発明のブランケットの層構成の一例を示す断面図である。
【図２】本発明のブランケットを用いた微細パターン形成を説明する図である。
【図３】本発明のブランケットを用いた、微細な電極パターンを形成するための平凹版オフセット印刷機の一例を示す側面図である。
【図４】図３に示される平凹版オフセット印刷機の平面図である。
【図５】基布の積層構造を示す。
【図６】図６は支持フィルム５の剥離前のラミネート体の層構成を示す。
【符号の説明】
１　　ブランケット
２　　基布
３　　接着層
４　　表面ゴム層
５　　支持フィルム
１０　凹版
１１　凹部
１２　インキ
１３　ブランケット胴
１４　透明ガラス基板
２１　平凹版オフセット印刷機
２２　基台
２３　印刷定盤
２４　印刷版盤
２５　ガイドレール
２６　印刷ヘッド
２７　ブランケットロール
２８　第１のインキングロール群
２９　第２のインキングロール群
３０　インキブレード
３１　電極パターン被形成体
３２　印刷版
２０１、２０３、２０５　綿布
２０２　接着層
２０４　圧縮層[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a silicone rubber composition suitable for producing a blanket having a stable ink receptivity and excellent press life, a blanket produced using the silicone rubber composition, and a blanket using the silicone rubber composition. The present invention relates to a printing method, a thick film pattern, a member for a plasma display, a color filter, and an electromagnetic wave shielding member to which the printing method is applied.
[0002]
[Prior art]
Conventionally, there has been known a printing method in which ink held in an intaglio or planographic intaglio having a desired pattern formed thereon is received on a surface of a blanket, and further transferred from the blanket surface to a substrate. The characteristics of the blanket greatly affect the reproducibility of the print pixel shape and the stability during continuous printing.
[0003]
It has been reported that a color layer for a liquid crystal color filter is printed by intaglio offset printing using a silicone blanket (Japanese Patent Application Laid-Open No. 62-85202: a color filter having a color layer having a line width of about 100 to 300 μm). Manufacturing method). Since a silicone blanket generally has a low critical surface tension and low wettability to ink, it has the advantage of a high ink transfer rate from the blanket to the glass plate.
[0004]
However, a blanket with low wettability has poor ink receptivity from the plate to the blanket, and tends to repel ink on the blanket. Therefore, it is difficult to obtain the resolving power required to clearly reproduce a pattern with a narrow line width (about 20 μm) such as a black matrix layer. Japanese Patent No. 3153033 proposes that a blanket having both high ink transfer rate and fine line reproducibility can be realized by using a linear organosiloxane as a blanket material.
[0005]
[Problems to be solved by the invention]
However, blankets manufactured using linear organosiloxanes, when printing is repeated, when the ink held in the intaglio or planographic intaglio is received by the blanket, the amount of ink received gradually decreases, that is, In addition, the ink receptivity from the plate to the blanket deteriorates, and there is a disadvantage that turbulence (undulation) of the fine line is generated or the thin line is broken.
[0006]
Therefore, the present invention provides a silicone rubber composition suitable for producing a blanket having a stable ink receptivity and excellent printing durability even when printing is repeated, and a production process using the silicone rubber composition. An object of the present invention is to provide a blanket provided, a printing method using the blanket, and a thick film obtained by applying the printing method.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the addition-curable silicone rubber composition of the present invention contains the following components A to E as essential components, wherein the components A to E have the following compounding ratio, and a durometer after curing. A is an addition-curable silicone rubber composition having a hardness of 60 to 95 according to JIS (K6249).
[0008]
A component: having at least two vinyl groups bonded to a silicon atom in one molecule, and having a vinyl group content of 1 × 10 ⁻³ mol / g to 1 × 10 ⁻⁵ mol / g; And a linear organopolysiloxane in which 90% or more of all organic groups including alkenyl groups are methyl groups, 60 to 20 parts by weight,
[0009]
B component: R ₃ SiO _1/2 unit (where R is an unsubstituted or substituted monovalent hydrocarbon group) and SiO ₂ unit as main components, and R ₃ SiO _1/2 unit and SiO ₂ unit molar ratio is _[R 3 _SiO 1/2 / _{SiO 2]} is 0.5 to 1.2, and contain at least two vinyl groups in a molecule, the vinyl group content of 1 × ^{10 -2} mol / g to 1 × 10 ⁻⁴ mol / g in a range from 40 to 80 parts by weight,
The total amount of the components A and B: 100 parts by weight,
[0010]
Component C: an organohydrogenpolysiloxane containing at least two hydrogen atoms bonded to a silicon atom in one molecule and having a Si—H group content of 0.015 mol / g to 0.0025 mol / g. Is 2.0 to 30 parts by weight based on 100 parts by weight of the total of the components A and B,
[0011]
D component: an inorganic filler having an average particle diameter of 50 μm or less, 0 to 100 parts by weight based on 100 parts by weight of the total of the components A and B;
Component E: 0.5 to 100 ppm of an addition reaction catalyst.
[0012]
The blanket of the present invention is characterized in that a surface rubber layer constituting the outermost surface of the blanket is formed using the above-mentioned addition-curable silicone rubber composition.
[0013]
In the printing method of the present invention, the ink held in the intaglio or planographic intaglio with the desired pattern is transferred to the surface rubber layer of the blanket mounted on the cylinder of the printing press, and then the glass, It is characterized in that ink is transferred onto a substrate such as a film.
[0014]
The method for manufacturing a thick film pattern according to the present invention is characterized in that a thick film pattern is manufactured by applying the printing method according to the present invention, and the product related to the thick film pattern includes, for example, a color filter and a plasma display Members (more specifically, electrodes for a plasma display) and an electromagnetic wave shielding member.
[0015]
A blanket obtained by using the addition-curable silicone rubber composition of the present invention for the surface rubber layer constituting the outermost surface of the blanket is to receive an ink held in an intaglio or planographic intaglio having a desired pattern formed on the blanket, Further, even in the transfer from the surface of the blanket to the substrate, the ink acceptability is always stable, and the printing durability is excellent.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Blanket FIG. 1 is a sectional view showing an example of the layer structure of the blanket of the present invention. In FIG. 1, a blanket 1 includes a base fabric 2 including a compression layer (not shown), and a surface rubber layer 4 formed on the base fabric 2 with an adhesive layer 3 interposed therebetween.
[0017]
The base fabric 2 serves to prevent the blanket 1 from being stretched under tension when the blanket 1 is mounted on a cylinder (not shown) of a printing press, and is a well-known base used for a conventional blanket. Cloth can be used. The base cloth 2 includes one or more layers of cloth (not shown) and a compression layer (not shown), and has an adhesive layer (not shown) for bonding the cloth (not shown). It may be provided.
[0018]
The compression layer (not shown) has a sponge-like structure. When pressure is applied to the surface rubber layer 4 from the outside, the compression layer is compressed and absorbs stress to deform the surface rubber layer 4 ( It prevents the occurrence of a bulge phenomenon and prevents a decrease in the dimensional accuracy of the print pattern. The surface rubber layer 4 has a function of receiving the ink held in the intaglio and then transferring the received ink to a substrate (substrate to be printed).
[0019]
The adhesive layer 3 provided on the base cloth 2 is provided to strengthen the adhesion between the base cloth 2 and the surface rubber layer 4. The adhesive layer 3 can be formed of a material such as a silicone resin. The thickness of the adhesive layer 3 is preferably about 0 to 500 μm, and may be omitted if there is an anchor effect between the base cloth 2 and the surface rubber layer 4.
[0020]
In the above example, the blanket 1 is a so-called compressible blanket, but the present invention is not limited to this, and may be a solid blanket without a compression layer. Further, a plastic film such as a PET film can be used instead of the base cloth 2.
[0021]
In the present invention, the silicone rubber that can be used to form the surface rubber layer 4 contains the above-mentioned components A to E in the above-described mixing ratio, and has a hardness of 60 to 95 according to a durometer A after curing (conforming to JIS (K6249)). An addition-curable silicone rubber composition is used.
[0022]
An example of a method for manufacturing the blanket 1 will be described below. A surface rubber layer 4 is formed by coating on a release film such as a PET film. On the other hand, the adhesive layer 3 is formed on the base fabric 2 including the compression layer by coating. Next, the surface rubber layer 4 on the support film is pressed and bonded to the adhesive layer 3, and then the surface rubber layer 4 is cured. Next, the support film is peeled off to obtain a blanket 1.
[0023]
As the base cloth, cotton cloth, polyester cloth, nylon cloth, vinylon cloth, etc. can be used. As the base film instead of the base cloth, PET film, PP film, polyimide film, PEN film, PPS film, metal foil, etc. are used. it can. As the adhesive layer of the blanket, silicone rubber having a Type A hardness of 30 to 80 ° in a JIS (K6253) durometer hardness test, NBR (acrylonitrile-butadiene rubber), CR (chloroprene rubber), IIR (butyl rubber), EPDM (ethylene -Propylene rubber) and the like.
[0024]
Addition-curable silicone rubber composition A component: The A component has at least two vinyl groups bonded to a silicon atom in one molecule, and has a vinyl group content of 1 × 10 ⁻³ mol / g to 1 ×. It is a linear organopolysiloxane in the range of 10 ⁻⁵ mol / g and 90% or more of all organic groups including alkenyl groups are methyl groups. The linear organopolysiloxane lowers the critical surface tension of the blanket, lowers the wettability of the blanket with the ink, and gives the ink a transfer property.
[0025]
If the amount of the component A is less than 20 parts by weight, a decrease in wettability with respect to the ink cannot be expected, and the transferability of the ink becomes inferior. If the amount exceeds 60 parts by weight, the acceptability of the ink deteriorates with an increase in the number of printed sheets. Therefore, the printing durability is inferior. In the linear organopolysiloxane of the component A, if the vinyl group content is less than 1 × 10 ⁻⁵ mol / g, the transferability of the ink becomes inferior and more than 1 × 10 ⁻³ mol / g. And poor printing durability.
[0026]
B component: The B component is mainly composed of R ₃ SiO _1/2 unit (where R is an unsubstituted or substituted monovalent hydrocarbon group) and SiO ₂ unit, and R ₃ SiO _1/2 unit and SiO ₂ unit. The molar ratio [R ₃ SiO _1/2 / SiO ₂ ] with respect to ₂ units is 0.5 to 1.2, and at least two vinyl groups are contained in one molecule, and the vinyl group content is 1 It is a resinous copolymer in the range of × 10 ⁻² mol / g to 1 × 10 ⁻⁴ mol / g.
[0027]
Since the component B is a resinous copolymer, it gives strength to the blanket and imparts printing durability. That is, even if printing is repeatedly performed with a blanket using the addition-curable silicone rubber composition containing the component B, the transfer ink amount is always stable. That is, the ink receiving property from the plate to the blanket is deteriorated, thereby preventing the inconvenience of disorder (undulation) of the fine line or disconnection of the fine line. If the B component is less than 40 parts by weight, the printing durability is poor, and if it exceeds 80 parts by weight, the transferability of the ink from the blanket to the substrate is poor.
[0028]
In the resinous copolymer of the B component, [R ₃ SiO _1/2 / SiO ₂ ] is used to represent the balance between ink transferability and printing durability. If it exceeds 1.2, the printing durability will be poor. In the resinous copolymer of the component B, at least two vinyl groups are contained in one molecule, and the vinyl group content is in the range of 1 × 10 ⁻² mol / g to 1 × 10 ⁻⁴ mol / g. Something is necessary for press life and ink transfer. If the vinyl group content is less than 1 × 10 ⁻⁴ mol / g, the transferability of the ink will be poor, and if it exceeds 1 × 10 ⁻² mol / g, the printing durability will be poor.
[0029]
C component: The C component contains at least two hydrogen atoms bonded to a silicon atom in one molecule, and has an Si—H group content of 0.015 mol / g to 0.0025 mol / g. Genpolysiloxane.
[0030]
SiH in the component C is a cross-linking group, functions as a cross-linking agent, and copolymerizes with the vinyl group contained in the component A and the component B. By using the component C, the liquid rubber material is cured by an addition reaction, and can be used as a surface rubber layer constituting the outermost surface of the blanket. If the amount of the component C is less than 2.0 parts by weight based on 100 parts by weight of the total amount of the components A and B, the crosslinking is insufficient and sufficient rubber properties cannot be obtained. The C component of the reaction deteriorates the ink acceptability and transferability. When the Si—H group content of the addition-crosslinking silicone rubber of the component C exceeds 0.015 mol / g, the unreacted component C deteriorates the ink acceptability and transferability, and is less than 0.0025 mol / g. In such a case, crosslinking is insufficient and sufficient rubber properties cannot be obtained.
[0031]
[R ₂ HSiO _1/2 / SiO ₂ ] in the component C is used to indicate the strength of the function as a cross-linking agent. If it is less than 0.5, insufficient crosslinking will occur, and if it exceeds 2.0, ink will be accepted. -It deteriorates metastatic property.
[0032]
Component D: Component D is an inorganic filler having an average particle size of 50 μm or less. The D component, like the B component, imparts strength to the blanket and imparts printing durability. That is, even if printing is repeatedly performed with a blanket using the addition-curable silicone rubber composition containing the D component, the transfer ink amount is always stable. Since the D component is an optional component, it may be zero parts by weight. If the D component exceeds 100 parts by weight based on 100 parts by weight of the total of the A component and the B component, the rubber becomes brittle, and rubber properties such as tensile strength are undesirably reduced. If the particle size of the inorganic filler exceeds 50 μm, the smoothness of the surface rubber layer of the blanket deteriorates, which is not preferable.
[0033]
As the inorganic filler of the D component, one or two or more selected from fumed silica, precipitated silica, quartz powder, diatomaceous earth, talc, clay, mica, alumina, titanium oxide, iron oxide, and carbon can be used.
[0034]
E component: The E component is a catalyst for accelerating the addition reaction between the C component, the A component and the B component, and includes, for example, platinum black, chloroplatinic chloride, chloroplatinic acid, chloroplatinic acid and a monohydric alcohol. And platinum group metal catalysts such as platinum-based catalysts such as platinum bisacetoacetate, palladium-based catalysts and rhodium-based catalysts.
[0035]
Printing method By using the blanket cylinder on which the blanket 1 of the present invention is mounted as described above, the ink held in the intaglio or planographic printing plate on which the desired pattern is formed is transferred to the surface rubber layer of the blanket cylinder. Thereafter, printing is performed by transferring ink from the blanket cylinder onto a substrate (glass, film, or the like).
[0036]
For example, FIG. 2 is a diagram illustrating the formation of a fine pattern in the formation of a thick film using the blanket of the present invention by intaglio offset printing. In FIG. 2, first, ink 12 is filled into a concave portion 11 formed in a predetermined pattern in an intaglio plate 10 (FIG. 2A). Next, the blanket cylinder 13 on which the blanket of the present invention is mounted is pressed onto the intaglio plate 10 while being rotationally moved to transfer the ink 12 in the concave portion 11 onto the blanket cylinder 13 (FIG. 2B). Then, by pressing this blanket cylinder 13 against a transparent glass substrate 14 which is a printing material, the ink 12 on the blanket cylinder 13 is transferred to the transparent glass substrate 14 to form a fine pattern (FIG. 2C).
[0037]
The intaglio plate depth in such intaglio offset printing is preferably 50 μm or less, more preferably in the range of 1 to 30 μm.
[0038]
FIG. 3 is a side view showing an example of a planographic intaglio offset printing press for forming a fine electrode pattern using the blanket of the present invention as another printing method, and FIG. 4 is a planographic intaglio plate shown in FIG. It is a top view of an offset printing machine. 3 and 4, a planographic intaglio offset printing press 21 includes a base 22 on which a printing platen 23 and a printing plate 24 are arranged at predetermined intervals, and two guide rails 25, 25 are laid in parallel. And a print head 26 which can be freely moved on the guide rails 25 by a moving mechanism (not shown).
[0039]
The print head 26 is provided with a blanket roll 27 that can be moved up and down and a first inking roll group 28. The first inking roll group 28 includes a kneading roller that swings in the rotation axis direction of the roll and an inking roll that applies ink to a printing plate. The base 22 is provided with a second inking roll group 29 and an ink blade 30 for storing conductive ink. The second inking roll group 29 includes an ink discharging roll for discharging ink from the ink blade 30, and a kneading roller that swings in the rotation axis direction of the roll.
[0040]
In the planographic intaglio offset printing press 21, an electrode pattern forming body 31 (shown by a dashed line in FIG. 4) is placed on a printing platen 23, and a printing plate 32 (shown by a dashed line in FIG. 4) is formed. It is mounted on the printing plate 24. Then, the print head 26 first moves on the guide rails 25, 25 onto the second inking roll group 29. Here, the conductive ink kneaded and uniformed in the second inking roll group 29 is transferred to the first inking roll group 28 of the print head 26. Next, the print head 26 moves on the guide rails 25, 25 toward the printing plate 24, and applies the conductive ink to the printing plate 32 by the inking rolls of the first inking roll group 28. After that, the print head 26 returns to the second inking roll group 29 side on the guide rails 25, 25, and the conductive ink kneaded and uniformized by the second inking roll group 29 is again printed. Transferred to a first inking roll group 28 of 26. During this time, the blanket roll 27 has risen to a position where it does not contact the printing plate 32. This ink application operation may be performed a plurality of times.
[0041]
Next, the print head 26 moves toward the printing platen 23 with the blanket roll 27 lowered to the printing position. Then, when the print head 26 passes through the printing plate 24, the conductive ink on the image portion of the printing plate 32 is transferred to the blanket roll 27, and at the same time, by the inking rolls of the first inking roll group 28. The printing plate 32 is newly coated with the conductive ink. The print head 26 further moves toward the printing platen 23, and the conductive ink is printed from the blanket roll 27 on the electrode pattern forming body 31 placed on the printing platen 23. Thereafter, the print head 26 returns to the second inking roll group 29 side.
[0042]
When the print head 26 returns to the second inking roll group 29 side, the printing may be performed on the electrode pattern forming body 31 by the blanket roll 27 so as to overlap. When the print head 26 returns to the second inking roll group 29 side, the print head 26 returns while transferring the conductive ink from the printing plate 32 to the blanket roll 27, and the print head 26 moves toward the printing platen 23 again. At this time, the conductive ink may be transferred onto the blanket roll 27 while being superposed. By doing so, it is possible to print the electrode pattern thickly and to prevent the generation of holes.
[0043]
【Example】
Addition-curable silicone rubber composition The following components A to E were mixed to prepare an addition-curable silicone rubber composition. The mixing ratios (parts by weight) of the components A to E were the combinations shown in Table 1.
[0044]
A component: The viscosity at 25 ° C. is 5000 mPa.s. A dimethylpolysiloxane in which both ends of the molecular chain s are blocked with a dimethylvinylsiloxy group.
[0045]
B component: (CH ₃ ) ₃ SiO _1/2 unit, (CH ₂ ＣＨCH) (CH ₃ ) ₂ SiO _1/2 unit and SiO ₂ unit, and in the molar ratio of the following formula and the following vinyl group content: Some resinous copolymers.
[Sum of (CH ₃ ) ₃ SiO _1/2 unit and (CH ₂ ＣＨCH) (CH ₃ ) ₂ SiO _1/2 unit] / SiO ₂ unit = 0.8 (molar ratio)
Vinyl group content = 0.0008 mol / g
[0046]
Component C: a copolymer composed of (CH ₃ ) ₂ HSiO _1/2 units and SiO ₂ units and having the following molar ratio and the following SiH group content.
(CH ₃ ) ₂ HSiO _1/2 unit / SiO ₂ unit = 1.4 (molar ratio)
SiH group content = 0.0092 mol / g
[0047]
D component: quartz powder having an average particle diameter of 1.5 μm
E component: 1% propyl alcohol solution of chloroplatinic acid (0.2 parts by weight, that is, 20 ppm based on 100 parts by weight of the total amount of the above components A and B)
[0049]
Production of blanket and its configuration Step 1: A PET film (Lumirror T60: trade name, manufactured by Toray Industries, Inc.) having a film thickness of 125 μm was used as the releasable support film 5 (shown in FIG. 6). On the support film 5, the addition-curable silicone rubber composition prepared in the above step is applied, and dried and crosslinked at 120 ° C. for 10 minutes in a drying oven to form the surface rubber layer 4 (shown in FIG. 6). Formed.
[0050]
Step 2: On the other hand, a base fabric having a laminated structure shown in FIG. 5 was prepared. In FIG. 5, 2 is a base cloth, 201 is a cotton cloth having a thickness of 0.3 mm, 203 is a cotton cloth having a thickness of 0.3 mm, 205 is a cotton cloth having a thickness of 0.2 mm, and 202 is a film for bonding the cotton cloths to each other. An adhesive layer of acrylonitrile-butadiene rubber having a thickness of 0.3 mm is formed, and a compression layer 204 having a sponge structure of acrylonitrile-butadiene rubber having a thickness of 0.5 mm is formed.
[0051]
The following adhesive layer was formed on the base fabric 2 having the above laminated structure. That is, paramethylbenzoyl peroxide (C-23, trade name, manufactured by Shin-Etsu Chemical Co., Ltd.) was added to 100 parts by weight of silicone rubber (KE-571-U, trade name, manufactured by Shin-Etsu Chemical Co., Ltd.). One part by weight of 1.5 parts by weight was prepared, and the preparation was calender-molded on the cotton cloth 205 of the base cloth 2 to form an adhesive layer 3 (shown in FIG. 6) having a thickness of 200 μm.
[0052]
Step 3: The surface rubber layer 4 formed on the support film 5 obtained in the above step 1 and the adhesive layer 3 formed on the base fabric 2 obtained in the above step 2 are bonded to such an extent that bubbles do not engage. The laminate was laminated.
[0053]
Step 4: The laminate obtained in the above step 3 was pressed with a flat heat press under the conditions of 1 kgf / cm ² , 120 ° C. and 20 minutes. Thereby, the adhesive layer 3 was cross-linked, and the laminate was completely bonded.
[0054]
Step 5: The support film 5 was peeled off from the laminate obtained in the step 4 to obtain a blanket of this example. FIG. 6 shows the layer structure of the laminate before the support film 5 is peeled off. In FIG. 6, 3 indicates an adhesive layer made of silicone rubber, 4 indicates a surface rubber layer, and 5 indicates a support film.
[0055]

[0056]
The viscosity of the conductive ink having the above composition was a high viscosity of about 7,000 P at 23 ° C. and a shear rate of 10 (1 / S). The organic components of the conductive ink having the above composition can be removed by firing.
[0057]
Printing Using a planographic intaglio offset printing machine (manufactured by Kobei Seisakusho Co., Ltd.) shown in FIG. 3 and FIG. 4, a 2.8 mm thick × 42 inch size glass substrate is wet-on-wet. Printing was done. The printing conditions were as follows: the filling speed for filling the printing plate with the ink and the transferring speed for transferring the ink to the glass substrate were each 500 mm / sec, the receiving speed received from the printing plate to the blanket was 50 mm / sec, and the printing plate and the glass printing pressure were used. Was 0.2 mm, the printing plate and glass temperatures were 20 ° C., and the printing pattern was L / S = 100/100 μ (where L means a printed portion and S means a space). The blanket used was the one obtained in the above step. As a printing plate, DG2 (trade name: manufactured by Toray Industries, Inc.) having a plate groove of 4 μm without water was used.
[0058]
After printing, it was dried at 200 ° C. for 10 minutes and baked at a peak temperature of 600 ° C. to form a PDP address electrode. The obtained electrode had a line width of 100 ± 5μ and a thickness of 2 ± 1μ. Observation of the obtained printed matter showed that there was no occurrence of turbulence (undulation) of the fine line and no breakage of the fine line, a small in-plane variation was formed, and stable printing of 2,000 or more sheets was confirmed.
[0059]
The results are shown in Table 1 below.
[0060]
[Table 1]

[0061]
【The invention's effect】
The blanket for offset printing formed using the addition-curable silicone rubber composition of the present invention always has stable ink receptivity and excellent printing durability even when printing is repeated.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating an example of a layer configuration of a blanket of the present invention.
FIG. 2 is a diagram illustrating formation of a fine pattern using a blanket of the present invention.
FIG. 3 is a side view showing an example of a planographic intaglio offset printing press for forming a fine electrode pattern using the blanket of the present invention.
FIG. 4 is a plan view of the planographic printing press shown in FIG. 3;
FIG. 5 shows a laminated structure of a base fabric.
FIG. 6 shows a layer structure of a laminate before peeling of a support film 5;
[Explanation of symbols]
REFERENCE SIGNS LIST 1 blanket 2 base cloth 3 adhesive layer 4 surface rubber layer 5 support film 10 intaglio 11 recess 12 ink 13 blanket cylinder 14 transparent glass substrate 21 planographic intaglio offset printing machine 22 base 23 printing platen 24 printing plate 25 guide rail 26 printing Head 27 Blanket roll 28 First inking roll group 29 Second inking roll group 30 Ink blade 31 Electrode pattern forming body 32 Printing plates 201, 203, 205 Cotton cloth 202 Adhesive layer 204 Compressed layer

Claims (7)

An addition-curable silicone containing the following components A to E as essential components, the components A to E having the following compounding ratio, and having a hardness of 60 to 95 according to a durometer A (conforming to JIS (K6249)) after curing. Rubber composition:
A component: having at least two vinyl groups bonded to a silicon atom in one molecule, and having a vinyl group content of 1 × 10 ⁻³ mol / g to 1 × 10 ⁻⁵ mol / g; And a linear organopolysiloxane in which 90% or more of all organic groups including alkenyl groups are methyl groups, 60 to 20 parts by weight,
B component: R ₃ SiO _1/2 unit (where R is an unsubstituted or substituted monovalent hydrocarbon group) and SiO ₂ unit as main components, and R ₃ SiO _1/2 unit and SiO ₂ unit molar ratio is _[R 3 _SiO 1/2 / _{SiO 2]} is 0.5 to 1.2, and contain at least two vinyl groups in a molecule, the vinyl group content of 1 × ^{10 -2} mol / g to 1 × 10 ⁻⁴ mol / g in a range from 40 to 80 parts by weight,
The total amount of the components A and B: 100 parts by weight,
Component C: an organohydrogenpolysiloxane containing at least two hydrogen atoms bonded to silicon atoms in one molecule and having a Si—H group content in the range of 0.015 mol / g to 0.0025 mol / g. Is 2.0 to 30 parts by weight based on 100 parts by weight of the total amount of the components A and B,
Component D: an inorganic filler having an average particle diameter of 50 μm or less, 0 to 100 parts by weight based on 100 parts by weight of the total amount of the components A and B;
Component E: 0.5 to 100 ppm of an addition reaction catalyst. The C component is mainly composed of an R ₂ HSiO _1/2 unit (where R is an unsubstituted or substituted monovalent hydrocarbon group) and a SiO ₂ unit, and an R ₂ HSiO _1/2 unit and an SiO ₂ unit. _2. The addition-curable silicone rubber composition according to claim 1, wherein the molar ratio [R ₂ HSiO _1/2 / SiO ₂ ] is in the range of 0.5 to 2.0. The D component is one or more selected from fumed silica, precipitated silica, quartz powder, diatomaceous earth, talc, clay, mica, alumina, titanium oxide, iron oxide, and carbon. 2. The addition-curable silicone rubber composition according to 1. A blanket, wherein a surface rubber layer constituting the outermost surface of the blanket is formed using the addition-curable silicone rubber composition according to claim 1. The ink held in the intaglio or planographic intaglio having the desired pattern formed thereon is transferred to a surface rubber layer of a blanket according to claim 4, which is mounted on a cylinder of a printing press, and thereafter the ink is transferred from the blanket onto a substrate. A printing method characterized by transferring a color. A thick film pattern formed by the printing method according to claim 5. An electrode for a plasma display formed by the printing method according to claim 5.

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