JP2010076188A - Printing blanket, method for manufacturing printing blanket, and offset printing press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printing blanket which makes misalignment to the blanket cylinder difficult to occur and also enables good attachment. <P>SOLUTION: The printing blanket 900 is the printing blanket 900 of a square form, including a pair of insert ends Lb which are inserted into the attachment gap 611 of the blanket cylinder 610, a pair of the side ends La which form a circle by being attached to the blanket cylinder 610, and also a print surface and the opposite surface thereof which is the back surface 950, and having a non-slippery layer 500 in adjacent to the center of the back surface 950 from the side end La to the other side end La. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a printing blanket, a method for manufacturing a printing blanket, and an offset printing machine having a blanket cylinder to which the printing blanket is attached.

  The offset printing machine includes a plate cylinder in which a plate serving as a document is wound, a blanket cylinder that rotates in conjunction with the plate cylinder, and an impression cylinder that holds the printing paper together with the blanket cylinder.

  When the printing blanket is mounted on the blanket cylinder, the printing blanket is wound around the blanket cylinder, and then both ends thereof are inserted into a mounting gap provided on the blanket cylinder and are wound and mounted by a winding tool.

  Parts other than the both ends inserted into the mounting gap are fixed to the blanket cylinder by the tension between the both ends wound on the winding tool.

  When printing pressure and printing pressure are applied during printing, not only compressive stress in the vertical direction is applied to the surface of the printing blanket, but also shear stress is applied in the parallel direction.

  For this reason, not only vertical compression deformation but also parallel shear deformation occurs on the surface of the printing blanket.

  Then, especially when the printing area is large or the printing pressure is large, the printing blanket may slightly shift from the surface of the blanket cylinder due to shear stress generated in the parallel direction.

  Then, the printing pattern may be displaced from the pattern position on the plate due to the displacement of the printing blanket.

  Therefore, in order to prevent such a shift of the printing pattern, Patent Document 1 describes a printing blanket in which a non-slip layer is formed on the entire back surface.

  However, since this printing blanket has a non-slip layer formed on the entire back surface, when the printing blanket is mounted on the blanket cylinder, it is difficult for the printing blanket to slide against the blanket cylinder, so that the mounting is easy. There is a problem.

  Patent Document 2 describes a printing blanket in which a non-slip portion is formed on a part of the back surface thereof.

  According to this printing blanket, the mounting property when the printing blanket is mounted on the blanket cylinder is good.

  However, since this printing blanket is impregnated with a non-slip agent by spray coating on the back side thereof to form a non-slip part, the anti-skid agent is only exposed on the back side of the blanket. Therefore, the adhesive force of the printing blanket to the blanket cylinder is not sufficient, and the printing blanket may be displaced from the blanket cylinder.

Japanese Utility Model Publication No. 60-91454 Japanese Utility Model Publication No. 5-63869

  The present invention has been made in view of such problems, and an object of the present invention is to provide a printing blanket in which the printing blanket is not easily displaced from the blanket cylinder while maintaining the mounting property of the printing blanket. And Moreover, it aims at providing the manufacturing method of such a printing blanket. Moreover, it aims at providing the offset printing machine which uses such a printing blanket.

In order to achieve the above object, a printing blanket according to the first aspect of the present invention provides:
It has a pair of insertion ends inserted into the mounting gap of the blanket cylinder, and a pair of side ends that form a circle by being attached to the blanket cylinder, and has a printing surface and a back surface that is the opposite surface. A rectangular printing blanket,
In the vicinity of the center of the back surface, an anti-slip layer is provided from one side end to the other side end.

  In addition, the ratio of the length of the anti-slip layer on the side end portion side to the length of the side end portion of the printing blanket may be 1/13 or more and 5/13 or less.

  Further, the thickness of the anti-slip layer can be 0.001 mm or more and 0.01 mm or less.

  The anti-slip layer may have an aqueous emulsion type acrylic pressure-sensitive adhesive.

  Further, the insertion end portion may be a short end portion, and the side end portion may be a long end portion.

In order to achieve the above object, a method for manufacturing a printing blanket according to the second aspect of the present invention includes:
It has a pair of insertion ends inserted into the mounting gap of the blanket cylinder, and a pair of side ends that form a circle by being attached to the blanket cylinder, and has a printing surface and a back surface that is the opposite surface. , A method for manufacturing a rectangular printing blanket,
In the vicinity of the center portion of the back surface, there is a slip layer forming step of forming a slip layer from one side end portion to the other side end portion.

  In the anti-slip layer forming step, an aqueous emulsion type acrylic pressure-sensitive adhesive can be applied and dried.

  Further, the dynamic viscosity at 50 ° C. of the aqueous emulsion-type acrylic pressure-sensitive adhesive can be 80 poise or more and 150 poise or less.

  Moreover, the drying temperature after application | coating of the said water-based emulsion type acrylic adhesive is 80 degreeC or more and 100 degrees C or less, and it is also possible that drying time is 10 minutes or more and 20 minutes or less.

  The aqueous emulsion acrylic resin contained in the aqueous emulsion acrylic adhesive is methyl acrylate, ethyl acrylate, n-butyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate. , Stearyl acrylate, 2,2,2-trifluoroethyl acrylate, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, t-butyl methacrylate, cyclohexyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate , Stearyl methacrylate, 2,2,2-trifluoroethyl methacrylate, acrylic acid, methacrylic acid, maleic acid, itaconic acid, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 4-hydroxybutyrate 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 4-hydroxybutyl methacrylate, glycidyl methacrylate, 3,4-epoxycyclohexylmethyl methacrylate, N, N-dimethylacrylamide, 2-hydroxyethylacrylamide, N, (Meth) acrylic acid ester containing at least one of N-dimethylaminoethyl methacrylate, γ-methacryloxypropyltrimethoxysilane, and γ-methacryloxypropyltriethoxysilane, and (meth) acrylic acid It is also possible to synthesize at least one of them by emulsion polymerization.

In order to achieve the above object, an offset printing machine according to the third aspect of the present invention provides:
A printing section having a blanket cylinder to which the printing blanket described above is attached;
A paper feeding unit for feeding paper to the printing unit;
A paper discharge unit that discharges the paper from the printing unit.

  The printing blanket according to the present invention has good mounting properties and is less likely to be displaced with respect to the blanket cylinder.

[Print blanket]
The printing blanket 900 according to the present embodiment has a rectangular shape as shown in FIG. 1 and has a pair of insertion end portions Lb and a pair of side end portions La.

  In the printing blanket 900 according to this embodiment, the insertion end Lb is a relatively short end, and the side end La is a relatively long end. Although not limited to such a length, for example, the length of the side end portion La is 130 cm, and the length of the insertion end portion Lb is 83 cm.

  As shown in FIG. 2, the pair of insertion end portions Lb are inserted into the mounting gap 611 of the blanket cylinder 610 and are wound and mounted by the winding tool 612.

  In addition, as shown in FIG. 2, the pair of side end portions La forms a circle by attaching the printing blanket 900 to the blanket cylinder 610.

  Returning to FIG. 1, the printing blanket 900 has a printing surface and a back surface 950 which is the opposite surface.

  Near the center of the back surface 950, a non-slip layer 500 is formed from one side end La to the other side end La. The length of the side end portion Ls of the non-slip layer 500 is 30 cm.

  As shown in FIG. 3, the printing blanket 900 includes a base material layer 550 and a surface rubber layer 300. The overall thickness of the printing blanket 900 is not particularly limited, but may be, for example, 1.6 mm to 2.4 mm.

  The surface rubber layer 300 is a layer for receiving and transferring ink, and is formed of, for example, acrylonitrile butadiene rubber (NBR). Although the thickness of the surface rubber layer 300 is not specifically limited, For example, it can be 0.2-0.5 mm.

  The surface rubber layer 300 is laminated on the surface of the base material layer 550. Here, the surface of the base material layer 550 is a surface on the side to which the ink attached to the plate mounted on the plate cylinder is transferred.

  The base material layer 550 is configured with an adhesive rubber layer 210 between the base fabrics 110 and 120. As the base fabric, those conventionally used for this kind of printing blanket can be used effectively. Examples thereof include cotton cloth and woven cloth such as polyester or rayon, but are not limited thereto. In addition, in FIG. 3, although the base fabric is comprised by 2 sheets, it is not limited to such embodiment, The base material layer 550 is comprised by laminating | stacking 3 or more base fabrics. It is also possible.

  The base material layer 550 has a sponge layer (compressed layer) 400. The sponge layer 400 is an arbitrary layer that is formed in order to give a suitable compression property to the printing blanket 900 and to reduce the printing pressure to enable good printing. The thickness of the sponge layer 400 can be set to 0.1 mm to 0.6 mm, for example.

  A non-slip layer 500 is formed on the back surface 950 of the printing blanket 900 (that is, the surface of the base material layer 550 that is in contact with the blanket cylinder 610). As shown in FIG. 3, the anti-slip layer 500 is a layered structure having a thickness.

  The thickness of the non-slip layer 500 is not particularly limited, but can be, for example, 0.001 mm or more and 0.01 mm or less.

  When the thickness of the non-slip layer 500 is smaller than 0.001 mm, the thickness of the anti-slip layer 500 is small, and the adhesive force of the printing blanket 900 to the blanket cylinder 610 becomes insufficient, so that a deviation from the blanket cylinder 610 occurs. There is a possibility.

  On the other hand, when the thickness of the non-slip layer 500 is larger than 0.01 mm, the thickness of the anti-slip layer 500 is large, and a portion where the anti-slip layer 500 is provided protrudes to form a non-uniform printing surface. This is because there is a possibility.

  The anti-slip layer 500 contains an adhesive to adhere the back surface 950 of the printing blanket 900 to the blanket cylinder 610.

  The pressure-sensitive adhesive for the non-slip layer 500 is not particularly limited, and for example, an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, a vinyl acetate-based pressure-sensitive adhesive, or the like can be used.

  In this embodiment, an aqueous emulsion type acrylic pressure-sensitive adhesive is used. Since the water-based emulsion type acrylic pressure-sensitive adhesive does not contain an organic solvent, there is a low possibility of adversely affecting workers working indoors in the process of manufacturing the printing blanket 900. Therefore, the printing blanket 900 can be manufactured safely.

  The ratio of the length of the side end portion Ls of the non-slip layer 500 to the length of the side end portion La of the printing blanket 900 is not particularly limited, but is, for example, 1/13 or more and 5/13 or less. be able to.

  When the ratio of the length of the side end portion Ls of the non-slip layer 500 to the length of the side end portion La of the printing blanket 900 is smaller than 1/13, the adhesive strength of the printing blanket 900 to the blanket cylinder 610 is increased. Due to the insufficiency, the blanket cylinder 610 may be displaced.

  On the other hand, if the ratio of the length of the side end portion Ls of the non-slip layer 500 to the length of the side end portion La of the printing blanket 900 is greater than 5/13, the printing blanket 900 is mounted on the blanket cylinder 610. In doing so, the slipperiness with respect to the blanket cylinder 610 may be poor, and the mounting property may be insufficient.

  In this embodiment, since the side end portion Ls of the anti-slip layer 500 is, for example, 30 cm, the ratio of the length of the side end portion Ls of the anti-slip layer 500 to the length of the side end portion La of the printing blanket 900 is 3/13.

  As shown in FIG. 4A, the central portion of the back surface 950 of the printing blanket 900 includes a central line 920 located at a half-divided position of the side end portion La of the printing blanket 900, and the anti-slip layer 500. This means that the center line 510 located at the half-divided position of the side end portion Ls overlaps.

  Further, the vicinity of the center portion of the back surface 950 of the printing blanket 900 is a concept including not only the back surface 950 but also the vicinity of the center portion of the back surface 950.

  For example, the vicinity of the central portion of the back surface 950 of the printing blanket 900 is not limited to such a range, but as shown by an arrow in FIG. It means that the center line 510 of the non-slip layer 500 exists between the minute position (La × 0.5) and the position (La × 0.4) that is 0.4 times the side end portion La.

  The printing blanket 900 has a rectangular shape, but the rectangular shape is not limited to a rectangle. For example, as shown in FIG. 5, a triangular notch is formed at each corner portion of the printing blanket 900. It is a concept including shape.

  Further, the square shape of the printing blanket 900 is not limited to one in which the side end portion La or the insertion end portion Lb is formed in a straight line, and either or both of the side end portion La and the insertion end portion Lb are on the outside. It is a concept including what forms a convex curved surface.

[Method of manufacturing printing blanket]
Next, a method for manufacturing the above-described printing blanket 900 will be described. The manufacturing method of the printing blanket 900 according to the present embodiment is a slipping layer in which a non-slip layer is formed from one side end La to the other side end La near the center of the back surface 950 of the printing blanket 900. A stop layer forming step.

  The pressure-sensitive adhesive used in the anti-slip layer forming step is not particularly limited, and for example, an acrylic pressure-sensitive adhesive, a rubber pressure-sensitive adhesive, a silicone pressure-sensitive adhesive, a vinyl acetate pressure-sensitive adhesive, or the like can be used.

  In this embodiment, an aqueous emulsion type acrylic pressure-sensitive adhesive is used. Then, an aqueous emulsion type acrylic pressure-sensitive adhesive is applied to the vicinity of the center of the back surface 950 and then dried to form the non-slip layer 500. The aqueous emulsion type acrylic pressure-sensitive adhesive can be applied using, for example, a brush, a spray, a roll, a bar coater or the like.

  The dynamic viscosity at 50 ° C. of the aqueous emulsion type acrylic pressure-sensitive adhesive is not particularly limited, but can be, for example, 80 poise or more and 150 poise or less.

  This is because if the dynamic viscosity at 50 ° C. is larger than 150 poise, the viscosity is too high and the work efficiency when performing the coating work may be lowered. On the other hand, if the dynamic viscosity at 50 ° C. is less than 80 poise, it may be difficult to form the layer structure of the non-slip layer 500.

  Although the drying temperature after apply | coating an aqueous emulsion type acrylic adhesive is not specifically limited, For example, it can be 80 degreeC or more and 100 degrees C or less. This is because if the drying temperature is lower than 80 ° C., the drying efficiency may be insufficient. On the other hand, if the drying temperature is higher than 100 ° C., the work site becomes hot, causing problems in the work environment. Because it is possible.

  Moreover, the drying time after apply | coating an aqueous emulsion type acrylic adhesive is although it does not specifically limit, For example, it can be 10 to 20 minutes. If the drying time is shorter than 10 minutes, the drying may be insufficient depending on the drying temperature. On the other hand, if the drying time is longer than 20 minutes, the yield of the work process is deteriorated. This is because there is a possibility.

  The aqueous emulsion acrylic resin used for the aqueous emulsion acrylic pressure-sensitive adhesive is obtained by emulsion polymerization.

  The monomer used for emulsion polymerization is not particularly limited, and various (meth) acrylic acid, (meth) acrylic acid ester, and the like can be used. For example, (meth) acrylic acid ester monomers include methyl acrylate, ethyl acrylate, n-butyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, stearyl acrylate, acrylic acid 2, 2,2-trifluoroethyl, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, t-butyl methacrylate, cyclohexyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, stearyl methacrylate, 2, methacrylate 2,2-trifluoroethyl, acrylic acid, methacrylic acid, maleic acid, itaconic acid, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 4-hydroxybutyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl tacrylate, 4-hydroxybutyl methacrylate, glycidyl methacrylate, 3,4-epoxycyclohexylmethyl methacrylate, N, N-dimethylacrylamide, 2-hydroxyethylacrylamide, N, N-dimethylaminoethyl methacrylate, γ -Methacryloxypropyltrimethoxysilane, γ-methacryloxypropyltriethoxysilane, and combinations thereof can be used. The aqueous emulsion acrylic resin may be a copolymer of these.

  The surfactant used for the emulsion polymerization can be a known reactive surfactant, a non-reactive surfactant, or the like, or a mixture of two or more types.

  The average particle diameter of the resin emulsion of the water-based emulsion type acrylic pressure-sensitive adhesive is not particularly limited, but may be, for example, 80 nm to 150 nm. When the average particle diameter is smaller than 80 nm, the viscosity of the resin emulsion becomes too high, and there is a possibility that the working efficiency when coating is reduced. On the other hand, when the average particle size is larger than 150 nm, the reaction time of emulsion polymerization may be long and the yield may be lowered.

  In the anti-slip layer forming step, application and drying of the aqueous emulsion type acrylic pressure-sensitive adhesive can be repeated a plurality of times. For example, an aqueous emulsion type acrylic pressure-sensitive adhesive is applied near the center of the back surface 950 and dried. Next, the aqueous emulsion acrylic adhesive is applied again on the dried aqueous emulsion acrylic adhesive and dried. Thus, by repeating application and drying of the water-based emulsion type acrylic pressure-sensitive adhesive a plurality of times, it becomes easy to form the non-slip layer 500 having a uniform thickness without unevenness.

[Offset printing machine]
Next, an offset printing machine 910 using the printing blanket 900 according to the above-described embodiment will be described with reference to FIG.

  The offset printer 910 includes a printing unit 710 that performs printing, a paper feeding unit 720 that feeds paper to the printing unit 710, and a paper discharge unit 730 that ejects paper from the printing unit 710. As the paper to be printed, for example, it is possible to use a sheet, a web, or the like.

  The printing unit 710 includes a plate cylinder 630, a blanket cylinder 610 that is connected to the plate cylinder 630 to print on paper, a pressure cylinder 620 that is connected to the blanket cylinder 610, conveys paper, and presses the paper against the blanket cylinder 610. And having.

  The blanket 900 for printing according to the present embodiment can be attached to the blanket cylinder 610 with good wearability. Further, since the printing blanket 900 according to the present embodiment is attached to the blanket cylinder 610, the printing blanket 900 is not easily displaced with respect to the blanket cylinder 610 even when performing high-speed printing at 1000 rpm, for example.

[Print blanket]
A printing blanket 900 having the structure shown in FIGS. 1 and 3 was formed. The side end La was 130 cm, and the insertion end Lb was 83 cm. The length of the side end portion Ls of the non-slip layer 500 was 30 cm (Example 1).

  NBR was used as a material for forming the surface rubber layer. The thickness of the surface rubber layer was 0.4 mm. The material for forming the sponge layer 400 was NBR. The sponge layer 400 was a continuous foam type, and the thickness of the sponge layer 400 was 0.2 mm. The base fabric 110 and the base fabric 120 were made of cotton. For the adhesive rubber layer 210, medium and high nitrile type NBR was used as a main component. The thickness of the base material layer 550 was 2.2 mm.

  The non-slip layer 500 was formed by using an aqueous emulsion type acrylic pressure-sensitive adhesive (manufactured by Soken Chemical Co., Ltd .: RE-4) diluted in water. The dynamic viscosity at 50 ° C. of the aqueous emulsion type acrylic pressure-sensitive adhesive was 90 to 100 poise.

  The non-slip layer 500 was formed by applying an aqueous emulsion type acrylic pressure-sensitive adhesive to the central portion of the back surface 950 with a brush, then drying, applying again with a brush, and then drying. The drying time was 12 minutes each. Moreover, the drying temperature was 85 degreeC, respectively.

  The thickness of the non-slip layer 500 thus formed was 0.005 mm.

  Next, as Comparative Example 1, a printing blanket without the non-slip layer 500 was formed. Other configurations and materials were the same as in Example 1.

  Next, as Comparative Example 2, unlike the non-slip layer 500 in Example 1, an acrylic adhesive is impregnated by spray application using spray adhesive 55 (manufactured by Sumitomo 3M), which is an acrylic adhesive. Thus, a printing blanket having a non-slip portion was formed. In the printing blanket according to Comparative Example 2, since the acrylic pressure-sensitive adhesive is impregnated in the base material layer, the non-slip portion does not form a layer structure. The length of the side end portion Ls of the non-slip portion 500 was 30 cm. Other configurations and materials were the same as in Example 1.

[Adhesion test]
Example 1, Comparative Example 1, and Comparative Example 2 were tested for adhesion to the blanket cylinder 610. In the adhesive strength test, a printing blanket is mounted on the blanket cylinder 610, rotated a predetermined number of times, and then the printing blanket mounted on the blanket cylinder 610 meanders from the mounting position as indicated by an arrow in FIG. It was determined by measuring whether or not. The test conditions were a printing pressure of 0.30 mm, a rotational speed of 900 rpm, and a total rotational speed of 10,000.

  As shown in FIG. 8, the measurement location for testing the presence or absence of meandering was a location rotated 180 degrees and half from the mounting gap 611 of the blanket cylinder 610. This is because the vicinity of the mounting gap 611 is fixed by the entrainment tool 612, so that the printing blanket is less likely to meander.

  As shown in FIGS. 9 (a) and 9 (b), the meandering amount defines a reference line that is a position rotated 180 degrees and half from the mounting gap 611 of the blanket cylinder 610, and the blanket shown in FIG. 9 (a). Compared with the state before rotation of the cylinder 610, the degree of deviation of the printing blanket position from the one end on the reference line in the state after rotation of the blanket cylinder 610 shown in FIG. 9B is measured. Decided.

  The test under the conditions described above was performed three times for each of Example 1, Comparative Example 1, and Comparative Example 2. The meandering amount was evaluated as an average value.

  As a result, the average meandering amount of the printing blanket 900 according to Example 1 was 0.0 mm. The meandering amount of the printing blanket according to Comparative Example 1 was 3.0 mm. The meandering amount of the printing blanket according to Comparative Example 2 was 2.5 mm.

  From the above, it was found that the printing blanket 900 according to Example 1 is less likely to be displaced with respect to the blanket cylinder 610.

[Mountability test]
Next, the mounting property to the blanket cylinder 610 was tested. As Example 2, a printing blanket 900 in which the length of the side end portion Ls of the non-slip portion 500 was 10 cm was prepared. As Example 3, a printing blanket 900 in which the length of the side end portion Ls of the anti-slip portion 500 was 50 cm was prepared. Further, as Comparative Example 3, a printing blanket having a non-slip layer was prepared on the entire back surface (the coating width of the aqueous emulsion type acrylic pressure-sensitive adhesive is equal to the length of the side end portion La of 130 cm).

  When the printing blanket is mounted on the blanket cylinder 610, one insertion end Lb of the printing blanket is inserted into the mounting gap 611, and the other blanking end Lb is used to attach the printing blanket to the blanket cylinder 610. Winding, sliding, and wrapping and mounting are performed by the wrapping tool 612. However, if the printing blanket 900 is slippery with respect to the blanket cylinder 610, the mounting property to the blanket cylinder is deteriorated. As described above, the mounting property to the blanket cylinder means the ease of workability when the printing blanket 900 is wound around the blanket cylinder 610 and slid and mounted.

  When Example 1, Example 2, Example 3, and Comparative Example 3 were tested for wearability, as shown in Table 1, Example 1, Example 2, and Example 3 were all wearable. It was good. However, in Comparative Example 3, the mountability was insufficient.

  In addition, also about Example 2 and Example 3, the adhesive force test was done on condition mentioned above. As shown in Table 1, in Example 2, the meandering amount was 1.5 mm, and the meandering amount was slightly seen, but the deviation from the blanket cylinder 610 was slight. In Example 3, the average meandering amount was 0.0 mm.

  From the above, it was found that the printing blanket 900 according to the example 1, the example 2, and the example 3 has good mounting properties. Further, it was found that the printing blanket 900 according to Examples 2 and 3 is less likely to be displaced with respect to the blanket cylinder 610.

  As demonstrated in the present embodiment, the printing blanket 900 according to the present invention is less likely to be displaced with respect to the blanket cylinder 610 and has good wearability. For this reason, even when used in an offset printing machine that prints at high speed, such as printing for business forms, the printing blanket is less likely to be displaced with respect to the blanket cylinder, and the printed image is hardly displaced. Furthermore, the printing blanket 900 according to the present invention has very good mounting properties with respect to the blanket cylinder 610, and the working efficiency is extremely good. Furthermore, when the non-slip layer is formed with an aqueous emulsion type acrylic pressure-sensitive adhesive, since it does not contain an organic solvent, there is little possibility of adversely affecting workers, which is advantageous in terms of safety. Thus, the benefits obtained from the printing blanket 900 according to the present invention are significant.

It is a top view of the blanket for printing concerning this embodiment. It is a figure explaining the state which mounted | wore the blanket cylinder with the printing blanket which concerns on this embodiment. It is sectional drawing of the printing blanket which concerns on this embodiment. It is a figure explaining the back surface of the printing blanket which concerns on this embodiment, among which (a) is a figure explaining a center part, (b) is a figure explaining the center part vicinity. It is a figure explaining the form of the square shape of the blanket for printing concerning this embodiment. It is a figure explaining the offset printing machine concerning this embodiment. It is a figure explaining a meandering test. It is a figure explaining the measurement location of a meandering test. It is a figure explaining the measuring method of the meandering amount of a meandering test, (a) is a state before rotation, (b) is a state after rotation.

Explanation of symbols

500 Non-slip layer 610 Blanket cylinder 611 Mounting gap 612 Roll-in tool 620 Impression cylinder 630 Plate cylinder 710 Printing unit 720 Paper feeding unit 730 Paper discharging unit 900 Printing blanket 910 Offset printing machine 950 Back side

Claims (11)

It has a pair of insertion ends inserted into the mounting gap of the blanket cylinder, and a pair of side ends that form a circle by being attached to the blanket cylinder, and has a printing surface and a back surface that is the opposite surface. A rectangular printing blanket,
Near the center of the back surface, from one side edge to the other side edge, has a non-slip layer,
A blanket for printing. The ratio of the length of the side end portion side of the anti-slip layer to the length of the side end portion of the printing blanket is 1/13 or more and 5/13 or less.
The printing blanket according to claim 1. The thickness of the non-slip layer is 0.001 mm or more and 0.01 mm or less,
The printing blanket according to claim 1 or 2. The non-slip layer has an aqueous emulsion-type acrylic adhesive.
The printing blanket according to any one of claims 1 to 3, wherein: The insertion end is a short end, and the side end is a long end.
The printing blanket according to any one of claims 1 to 4, wherein the printing blanket is provided. It has a pair of insertion ends inserted into the mounting gap of the blanket cylinder, and a pair of side ends that form a circle by being attached to the blanket cylinder, and has a printing surface and a back surface that is the opposite surface. , A method for manufacturing a rectangular printing blanket,
Near the center of the back surface, from one side end to the other side end, forming a non-slip layer, and having a non-slip layer forming step,
A method for producing a printing blanket. In the anti-slip layer forming step, an aqueous emulsion type acrylic pressure-sensitive adhesive is applied and dried.
The method for producing a printing blanket according to claim 6. The dynamic viscosity at 50 ° C. of the aqueous emulsion-type acrylic pressure-sensitive adhesive is 80 poise or more and 150 poise or less.
The method for producing a printing blanket according to claim 7. The drying temperature after application of the aqueous emulsion-type acrylic pressure-sensitive adhesive is 80 ° C. or more and 100 ° C. or less, and the drying time is 10 minutes or more and 20 minutes or less.
The method for producing a printing blanket according to claim 7 or 8. The water-based emulsion type acrylic resin contained in the water-based emulsion type acrylic pressure-sensitive adhesive includes methyl acrylate, ethyl acrylate, n-butyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, acrylic Stearyl acid, 2,2,2-trifluoroethyl acrylate, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, t-butyl methacrylate, cyclohexyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, methacryl Stearyl acid, 2,2,2-trifluoroethyl methacrylate, acrylic acid, methacrylic acid, maleic acid, itaconic acid, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 4-hydroxybutyl acrylate, 2-hydroxyethyl crylate, 2-hydroxypropyl methacrylate, 4-hydroxybutyl methacrylate, glycidyl methacrylate, 3,4-epoxycyclohexylmethyl methacrylate, N, N-dimethylacrylamide, 2-hydroxyethylacrylamide, N, N -Among the (meth) acrylic acid ester and (meth) acrylic acid containing at least any one of dimethylaminoethyl methacrylate, γ-methacryloxypropyltrimethoxysilane, and γ-methacryloxypropyltriethoxysilane Synthesizing at least one of them by emulsion polymerization,
A method for manufacturing a printing blanket according to any one of claims 7 to 9. A printing unit having a blanket cylinder to which the printing blanket according to any one of claims 1 to 5 is attached;
A paper feeding unit for feeding paper to the printing unit;
A paper discharge unit for discharging the paper from the printing unit,
An offset printing machine characterized by that.