Negative image thermosensitive type treatment-free offset plate material

Abstract

A negative image thermosensitive type treatment-free offset plate material comprises a plate base, an ultra-fine sand mesh layer is arranged at the upper end of the plate base, a thermosensitive coating is arranged at the upper end of the ultra-fine sand mesh layer, and an indentation protection layer is arranged at the upper end of the thermosensitive coating. And inferior printing plates caused in the transportation process are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of offset printing plate technology, and in particular to a negative thermal type non-processable offset printing plate. Background Technology

[0002] Offset printing is a type of planar printing. Simply put, offset printing is a printing method that uses a rubber blanket (printer blanket) to transfer the image from the printing plate to the substrate. The rubber blanket is the source of the name of this printing method. It plays an irreplaceable role in printing, such as effectively compensating for unevenness on the substrate surface, ensuring full ink transfer, and reducing the transfer of water from the printing plate (the role of water in printing will be discussed later) to the substrate. This is just a general concept. The term offset printing usually refers to a narrower range, specifically a planar printing method with three cylinders (printing plate, rubber blanket, and impression cylinder). In southern my country, this printing method is called offset printing.

[0003] Patent No. CN201420666291.3 discloses a field of offset printing plate technology, entitled "An Offset Printing Plate," comprising an aluminum substrate. Its key feature is that the aluminum substrate has an adhesive coating layer, a photosensitive material layer is coated on the adhesive coating layer, and an aluminum sulfate powder layer is coated on the adhesive coating layer, with a thickness of 0.5-1 gram / square meter. This offset printing plate has the advantages of simple equipment and low cost; the aluminum sulfate powder layer on the adhesive coating layer, with a thickness of 0.5-1 gram / square meter, also offers the advantage of good offset printing quality. However, this plate has the following problems: firstly, the plate is prone to surface indentations during group transportation, affecting plate quality; secondly, the plate base has limited resistance to pressure and friction during printing. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by setting an anti-indentation protective layer on the printing plate to solve the technical problem that indentations are easily generated on the surface of the printing plate during collective transportation, and by setting an aluminum support plate inside the printing plate base to solve the technical problem that the base layer of the printing plate can only withstand limited pressure and friction during the printing process.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A negative thermally sensitive, pre-treated offset printing plate, characterized in that: it includes a plate base, an ultra-fine mesh layer is provided on the upper end of the plate base, a thermal coating layer is provided on the upper end of the ultra-fine mesh layer, and an indentation-resistant protective layer is provided on the upper end of the thermal coating layer;

[0007] The base plate has a filling layer inside, and aluminum support plates are uniformly arranged inside the filling layer. Aluminum alloy plates are arranged at both the top and bottom of the filling layer.

[0008] As a preferred embodiment, the ultrafine sand mesh layer is an electrolytic composite sand mesh layer, and an electrolytic oxide film is provided on the upper end of the ultrafine sand mesh layer.

[0009] As a preferred embodiment, the upper end of the thermal coating is provided with a protective layer, the lower end of the protective layer is provided with a convertible phase change polymer layer, and the lower end of the convertible phase change polymer layer is provided with an anti-glare layer.

[0010] As a preferred embodiment, the indentation-resistant protective layer is entirely a transparent acrylic layer resistant to indentation.

[0011] As another preferred embodiment, the aluminum support plate supports each other from top to bottom, forming a triangular shape.

[0012] The beneficial effects of this utility model are:

[0013] (1) In this utility model, by setting an aluminum support plate for the internal filling layer of the plate base, the pressure and friction that the plate base can withstand during the printing process are increased. The upper and lower aluminum support plates support each other to form a triangular shape. The triangle has extremely high stability. During the printing process, gravity will press on the plate material. The triangular aluminum support plate will enhance the pressure and friction that the plate material can withstand, increase durability, and achieve the effect of multiple reprints and consistent printing plate quality.

[0014] (2) In this utility model, a convertible phase change polymer layer and an anti-halo layer are set inside the thermosensitive coating. The molecules in the convertible phase change polymer layer contain groups that can undergo oleophilic and hydrophilic changes when exposed to light or heat. Through exposure, the oleophilic and hydrophilic properties of the polymer itself can be changed. Thus, without relying on the hydrophilicity of the aluminum plate base, the purpose of the oleophilic and hydrophilic transformation of the exposed coating can be achieved. The separation of image and text in the printing process is achieved by changing the physical state of the material. At the same time, the anti-halo layer absorbs and reduces reflection, preventing strong light from being reflected back from the aluminum plate base, avoiding the molecules in the convertible phase change polymer layer from being exposed to light again, which would lead to a decrease in image quality. This increases the overall effect of the printing plate, while improving production efficiency, reducing chemical processing costs, and reducing environmental pollution.

[0015] (3) In this utility model, by setting an anti-indentation protective layer, it is possible to avoid indentation on the surface of the plate material during collective transportation. When the plate material is transported in a collective manner, it will be transported in layers. When there is an external force pushing, the plate material will be pressured at the gravity source, thus producing indentation. Indentation will affect the offset printing effect of the plate material. The anti-indentation transparent layer is an anti-indentation acrylic transparent layer. The acrylic layer provides excellent anti-indentation performance through its chemical structure and physical properties. These characteristics enable the acrylic layer to maintain the integrity and functionality of the structure when facing external pressure, thereby protecting the plate material from indentation damage. This makes the plate material transportation simpler and reduces the damage to the plate material without complicated processing, greatly reducing the inferior plate material caused during transportation.

[0016] In summary, this printing plate material has the advantages of increased durability, improved production efficiency, and a significant reduction in the loss of inferior printing plates during transportation, making it particularly suitable for the field of offset printing plate technology. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the substrate in this utility model.

[0020] Figure 3 This is a schematic diagram of the internal structure of the heat-sensitive coating in this utility model. Detailed Implementation

[0021] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0022] Example 1

[0023] like Figures 1 to 3 As shown, this utility model provides a negative thermal type non-processing offset printing plate, characterized in that: it includes a plate base 1, an ultra-fine mesh layer 2 is provided on the upper end of the plate base 1, a thermal coating layer 3 is provided on the upper end of the ultra-fine mesh layer 2, and an indentation resistant protective layer 4 is provided on the upper end of the thermal coating layer 3.

[0024] The base plate 1 has a filling layer 11 inside, and aluminum support plates are uniformly provided inside the filling layer (11). Aluminum alloy plates (12) are provided at both the upper and lower ends of the filling layer (11).

[0025] Furthermore, the ultrafine abrasive layer 2 is an electrolytic composite abrasive layer, which improves the resolution of the printing plate, can reproduce the subtle details of the image and text, and establishes a good adsorption foundation. The upper end of the ultrafine abrasive layer 2 is provided with an electrolytic oxide film, which improves the corrosion resistance and mechanical properties of the plate base 1.

[0026] Furthermore, the upper end of the thermal coating 3 is provided with a protective layer 31, the lower end of the protective layer 31 is provided with a convertible phase change polymer layer 32, and the lower end of the convertible phase change polymer layer 32 is provided with an anti-halo layer 33. The molecules in the convertible phase change polymer layer 32 contain groups that can undergo oleophilic or hydrophilic changes when exposed to light or heat. Through exposure, the oleophilic and hydrophilic properties of the polymer itself can be changed, so that the purpose of oleophilic and hydrophilic transformation of the exposed coating can be achieved without relying on the hydrophilicity of the plate base 1. The separation of image and text in the printing process is achieved by changing the physical state of the material. At the same time, the anti-halo layer 33 absorbs and reduces reflection, preventing strong light from being reflected back from the plate base 1, avoiding the molecules in the convertible phase change polymer layer 32 from being exposed to light again, which would lead to a decrease in image quality, improve the overall effect of the printing plate, and at the same time improve production efficiency, reduce chemical processing costs, and reduce environmental pollution.

[0027] Furthermore, the indentation-resistant protective layer 4 is an integral indentation-resistant acrylic transparent layer, which provides excellent indentation resistance through its chemical structure and physical properties.

[0028] Furthermore, the aluminum support plates support each other from top to bottom, forming a triangular shape. Triangles have extremely high stability. During the printing process, gravity will press on the printing plate, and the triangular aluminum support plates will enhance the pressure and friction that the printing plate can withstand, increasing durability and achieving the effect of multiple reprints and consistent printing plate quality.

[0029] Working process: First, a sandblasting electrolytic treatment is performed on the substrate 1, forming an ultra-fine sandblasted layer 2 on the upper part of the substrate 1. An electrolytic oxide film forms on the upper part of the ultra-fine sandblasted layer 2, improving the corrosion resistance and mechanical properties of the substrate 1. Next, a thermosensitive coating 3 is applied to the upper part of the ultra-fine sandblasted layer 2. The molecules in the convertible phase change polymer layer 3232 inside the thermosensitive coating 3 contain groups that can undergo oleophilic-hydrophilic changes when exposed to light or heat. Through exposure, the oleophilic-hydrophilic properties of the polymer itself can be changed, thus achieving the purpose of oleophilic-hydrophilic transformation of the exposed coating without relying on the hydrophilicity of the substrate 1. By changing the physical state of the material, the separation of image and text in the printing process is achieved. At the same time, the anti-halo layer 33 absorbs and reduces reflection, preventing strong light from being reflected back from the substrate 1 and avoiding the conversion of phase change polymer layer 3232. The molecules within the phase change polymer layer 32 are re-photosensitive, leading to a decrease in image quality and an increase in the overall effect of the printing plate. Then, an anti-indentation protective layer 4 is applied to the top of the thermal coating 3. When the plates are transported together, they are transported in overlapping layers. When there is an external force pushing, the plates will be pressured at the gravity source, resulting in indentations. Indentations will affect the offset printing effect of the plates. The anti-indentation transparent layer 4 is an anti-indentation acrylic transparent layer. The acrylic layer provides excellent anti-indentation performance through its chemical structure and physical properties. These characteristics enable the acrylic layer to maintain the integrity and functionality of its structure when facing external pressure, thereby protecting the plates from indentation damage. This makes the plate transportation simpler and reduces plate damage without complicated handling, greatly reducing the number of inferior plates caused during transportation.

[0030] Secondly, the aluminum support plate of the inner filling layer 11 of the plate base 1 increases the pressure and friction that the plate base 1 can withstand during the printing process. The upper and lower aluminum support plates support each other to form a triangular shape. Triangles have extremely high stability. During the printing process, gravity will press on the plate material. The triangular aluminum support plate will enhance the pressure and friction that the plate material can withstand, increase durability, and achieve the effect of multiple reprints and consistent printing plate quality.

[0031] In the description of this utility model, it should be understood that the terms "front and back", "left and right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0032] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0033] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A negative thermal-sensitive, pre-processed offset printing plate, characterized in that: Includes a base plate (1), the upper end of which is provided with an ultra-fine sand mesh layer (2), the upper end of which is provided with a heat-sensitive coating layer (3), and the upper end of which is provided with an indentation-resistant protective layer (4); The base plate (1) has a filling layer (11) inside, and an aluminum support plate is uniformly provided inside the filling layer (11). The upper and lower ends of the filling layer (11) are provided with aluminum alloy plates (12).

2. The negative thermal-sensitive, pre-treatment-free offset printing plate according to claim 1, characterized in that, The ultrafine sand layer (2) is an electrolytic composite sand layer, and an electrolytic oxide film is provided on the upper end of the ultrafine sand layer (2).

3. The negative thermal-sensitive, pre-treatment-free offset printing plate according to claim 1, characterized in that, The thermal coating (3) has a protective layer (31) at its upper end, a convertible phase change polymer layer (32) at its lower end, and an anti-glare layer (33) at its lower end.

4. The negative thermal-sensitive, pre-treatment-free offset printing plate according to claim 1, characterized in that, The indentation-resistant protective layer (4) is an integral indentation-resistant transparent acrylic layer.

5. The negative thermal-sensitive, pre-treatment-free offset printing plate according to claim 1, characterized in that, The aluminum support plates support each other vertically, forming a triangular shape.

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