阅读说明：本技术 一种网版的制备方法 (Preparation method of screen printing plate ) 是由 黄子祐 于 2021-01-19 设计创作，主要内容包括：本发明公开了本发明提供一种网版的制备方法,包括如下步骤：1)在钢丝网覆高分子膜之前,对钢丝网进行表面处理,使钢丝表面覆盖用于提高钢丝网反射率的反射层；2)在雷射后,对可印刷区域的钢丝网进行表面处理,使可印刷区域的钢丝覆盖用于提高钢丝网强度的强化层；3)在雷射后,对高分子膜进行表面处理,使高分子膜的贴印面和刮刀面覆盖用于提高高分子膜强度的强化层。本发明网版的制备方法,其能增加雷射对材料的选择性,克服长期印刷下刮刀磨损所造成的印刷不良,在细线印刷时提升印刷性。(The invention discloses a preparation method of a screen printing plate, which comprises the following steps: 1) before the steel wire mesh is coated with the polymer film, carrying out surface treatment on the steel wire mesh to enable the surface of the steel wire to be coated with a reflecting layer for improving the reflectivity of the steel wire mesh; 2) after the laser, carrying out surface treatment on the steel wire mesh in the printable area, so that the steel wires in the printable area cover a strengthening layer for improving the strength of the steel wire mesh; 3) after the laser treatment, the polymer film is subjected to surface treatment, so that the printing surface and the scraper surface of the polymer film are covered with a strengthening layer for improving the strength of the polymer film. The preparation method of the screen printing plate can increase the selectivity of laser to materials, overcome poor printing caused by abrasion of a scraper under long-term printing and improve the printing performance during fine line printing.)

1. A method for preparing a screen printing plate comprises the steps of fixing a polymer film on a steel wire mesh of the screen printing plate, and cutting a printable area on the polymer film through laser to expose the steel wire mesh of the printable area; it is characterized by also comprising the following steps:

1) before the steel wire mesh is coated with the polymer film, carrying out surface treatment on the steel wire mesh to enable the surface of the steel wire to be coated with a reflecting layer for improving the reflectivity of the steel wire mesh;

2) after the laser, carrying out surface treatment on the steel wire mesh in the printable area, so that the steel wires in the printable area cover a strengthening layer for improving the strength of the steel wire mesh;

3) after the laser treatment, the polymer film is subjected to surface treatment, so that the printing surface and the scraper surface of the polymer film are covered with a strengthening layer for improving the strength of the polymer film.

2. The method for producing a screen according to claim 1, wherein the reflective layer is made of a metal material.

3. The method for preparing a screen printing plate according to claim 2, wherein the metal material adopted by the strengthening layer is Cu, Al, Ag or Cr.

4. The method for preparing a screen printing plate according to claim 1, wherein the reinforcing layer is made of a polymer material, a metal material or a ceramic material.

5. The method for preparing a screen printing plate according to claim 4, wherein the polymer material adopted by the strengthening layer is PEEK, PAI, PI, PPS, PPSU, PSU, PEI, PTFE or PVDF.

6. The method for preparing a screen printing plate according to claim 4, wherein the metal material adopted by the strengthening layer is Ti, Cu, Al, Ag, Cr, Zn or Mo.

7. The method for preparing a screen printing plate according to claim 4, wherein the ceramic material adopted by the strengthening layer is TiO₂、SiO₂、ZnS、ZrO₂Or MgF₂。

8. The method for preparing a screen printing plate according to claim 1, wherein the surface treatment is electroplating, evaporation, spraying or chemical vapor deposition.

9. The method for producing a screen printing plate according to claim 8, wherein in the step 1):

when the electroplating process is adopted to carry out surface treatment on the steel wire mesh, ions in the electrolyte are reduced on the cathode steel wire mesh, the cathode needs to be in uniform contact with the surface of the steel wire mesh and is in contact with an article with good conductivity, and poor electroplating uniformity caused by different current densities is prevented;

when the evaporation process is adopted to carry out surface treatment on the steel wire mesh, an evaporation source is arranged on a heater in a vacuum environment to evaporate the steel wire mesh, a coating is formed on the steel wire mesh of the screen plate, the rotation of the screen plate is controlled or the evaporation source is increased, and the uniformity of evaporation is improved;

when the chemical vapor deposition process is adopted to carry out surface treatment on the steel wire mesh, the precursor is injected into the reaction cavity, the precursor reacts with the steel wires on the screen printing plate to form a coating, and reaction byproducts are discharged along with air flow.

Technical Field

The invention relates to a preparation method of a screen printing plate.

Background

With the development of solar cells pursuing low cost and high efficiency, screens used in printing are increasingly refined, and the traditional exposure screens cannot meet the trend of fine line trend. Therefore, the laser processing screen is produced in response to the environment.

The screen printing plate structure processed by laser is mainly composed of a steel wire mesh and a high polymer film layer, the high polymer film layer is covered on the steel wire mesh, a printable area is cut on the high polymer film layer, and the steel wire mesh of the printable area is exposed.

Because the steel wire mesh and the polymer film are made of different materials, the selectivity of laser to the materials during laser processing becomes a difficult problem. When the laser is not selective, the polymer material and the steel wire will be damaged during processing, which will limit the service life of the client, and will cause the screen to break directly.

In addition, when the solar screen printing plate is used for printing, the scraper is rubbed with the polymer film layer of the screen printing plate and the steel wire mesh in the printable area for a long time, so that the polymer film layer and the steel wire mesh in the printable area are easily worn, and the printing performance is further reduced.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides a method for preparing a screen printing plate, which comprises the steps of fixing a polymer film on a steel wire mesh of the screen printing plate, and cutting a printable area on the polymer film by laser to expose the steel wire mesh of the printable area; also comprises the following steps:

1) before the steel wire mesh is coated with the polymer film, carrying out surface treatment on the steel wire mesh to enable the surface of the steel wire to be coated with a reflecting layer for improving the reflectivity of the steel wire mesh;

during laser, the reflectivity of the steel wire mesh can be improved by the reflecting layer covered on the surface of the steel wire, the laser energy absorbed by the steel wire is reduced, the selectivity of a laser process is further improved, and the service life of the screen printing plate can be prolonged;

2) after the laser, carrying out surface treatment on the steel wire mesh in the printable area, so that the steel wires in the printable area cover a strengthening layer for improving the strength of the steel wire mesh;

when in printing, the reinforcing layer covered by the steel wires of the printable area (particularly the steel wires of the printable area of the paste printing surface) can reinforce the steel wire mesh, thereby prolonging the service life of the screen printing plate;

3) after laser, carrying out surface treatment on the polymer film in the non-printable area, and covering a strengthening layer for improving the strength of the polymer film on the printing surface and the scraper surface of the polymer film;

when printing, the strengthening layer covered by the pasting surface and the scraper surface of the polymer film in the non-printable area can strengthen the polymer film, thereby prolonging the service life of the screen printing plate.

Preferably, the reflecting layer is made of a metal material.

Preferably, the metal material adopted by the strengthening layer is Cu, Al, Ag or Cr.

Preferably, the strengthening layer is made of a high polymer material, a metal material or a ceramic material.

Preferably, the polymer material adopted by the strengthening layer is PEEK, PAI, PI, PPS, PPSU, PSU, PEI, PTFE or PVDF.

Preferably, the metal material adopted by the strengthening layer is Ti, Cu, Al, Ag, Cr, Zn or Mo.

Preferably, the ceramic material adopted by the strengthening layer is TiO₂、SiO₂、ZnS、ZrO₂Or MgF₂。

Preferably, the surface treatment adopts electroplating, evaporation, spraying or chemical vapor deposition and other processes.

Preferably, in step 1):

when the electroplating process is adopted to carry out surface treatment on the steel wire mesh, ions in the electrolyte are reduced on the cathode steel wire mesh, the cathode needs to be in uniform contact with the surface of the steel wire mesh, and can be contacted with an article with good conductivity (such as platinum), so that poor electroplating uniformity caused by different current densities is prevented;

when the evaporation process is adopted to carry out surface treatment on the steel wire mesh, an evaporation source is arranged on a heater in a vacuum environment to evaporate the steel wire mesh, a coating is formed on the steel wire mesh, the rotation of the screen can be controlled or the evaporation source is increased, and the uniformity of evaporation is improved;

when the chemical vapor deposition process is adopted to carry out surface treatment on the steel wire mesh, the precursor is injected into the reaction cavity, the precursor reacts with the steel wires on the screen printing plate to form a coating, and reaction byproducts are discharged along with air flow.

The invention has the advantages and beneficial effects that: the invention provides a preparation method of a screen printing plate, which can increase the selectivity of laser to materials, overcome poor printing caused by abrasion of a scraper in long-term printing and improve the printing performance in fine line printing.

The invention increases the selectivity of laser, enables plate making to have more choices of high polymer materials, changes the material characteristics, can lead fine line printing to advance to a new milestone, and has remarkable effect of reducing cost and improving efficiency of high-unit-price raw materials of customers.

The invention has the following characteristics:

1. the invention utilizes different surface treatment technologies to improve the printing performance of the screen printing plate, so that the screen printing plate has more possibilities on the practical surface, and the printing technology can be expanded to achieve a new milestone.

2. The present invention utilizes different surface treatment techniques to increase laser selectivity.

3. The invention changes the material characteristics, reduces the abrasion among objects, and improves the printing property.

Detailed Description

The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

The technical scheme of the specific implementation of the invention is as follows:

a method for preparing a screen printing plate comprises the steps of fixing a polymer film on a steel wire mesh of the screen printing plate, and cutting a printable area on the polymer film through laser to expose the steel wire mesh of the printable area; also comprises the following steps:

1) before the steel wire mesh is coated with the polymer film, the steel wire mesh is subjected to surface treatment by adopting the processes of electroplating, evaporation, spraying, chemical vapor deposition and the like, so that the surface of the steel wire is covered with a reflecting layer for improving the reflectivity of the steel wire mesh;

the reflecting layer is made of metal materials such as Cu, Al, Ag, Cr and the like;

during laser, the reflectivity of the steel wire mesh can be improved by the reflecting layer covered on the surface of the steel wire, the laser energy absorbed by the steel wire is reduced, the selectivity of a laser process is further improved, and the service life of the screen printing plate can be prolonged;

2) after the laser, the steel wire mesh in the printable area is subjected to surface treatment by adopting the processes of electroplating, evaporation, spraying, chemical vapor deposition and the like, so that the steel wires in the printable area cover a strengthening layer for improving the strength of the steel wire mesh;

the strengthening layer is made of PEEK, PAI, PI, PPS, PPSU, PSU, PEI, PTFE, PVDF and other polymer materials, or Ti, Cu, Al, Ag, Cr, Zn, Mo and other metal materials, or TiO₂、SiO₂、ZnS、ZrO₂、MgF₂And the like ceramic materials;

when in printing, the reinforcing layer covered by the steel wires of the printable area (particularly the steel wires of the printable area of the paste printing surface) can reinforce the steel wire mesh, thereby prolonging the service life of the screen printing plate;

3) after laser, the surface of the polymer film in the non-printable area is treated by adopting the processes of electroplating, evaporation, spraying, chemical vapor deposition and the like, so that the printing surface and the scraper surface of the polymer film are covered with a strengthening layer for improving the strength of the polymer film;

the strengthening layer is made of PEEK, PAI, PI, PPS, PPSU, PSU, PEI, PTFE, PVDF and other polymer materials, or Ti, Cu, Al, Ag, Cr, Zn, Mo and other metal materials, or TiO₂、SiO₂、ZnS、ZrO₂、MgF₂And the like ceramic materials;

when printing, the strengthening layer covered by the pasting surface and the scraper surface of the polymer film in the non-printable area can strengthen the polymer film, thereby prolonging the service life of the screen printing plate.

Specifically, in step 1):

when the electroplating process is adopted to carry out surface treatment on the steel wire mesh, ions in the electrolyte are reduced on the cathode steel wire mesh, the cathode needs to be in uniform contact with the surface of the steel wire mesh, and can be contacted with an article with good conductivity (such as platinum), so that poor electroplating uniformity caused by different current densities is prevented;

when the evaporation process is adopted to carry out surface treatment on the steel wire mesh, an evaporation source is arranged on a heater in a vacuum environment to evaporate the steel wire mesh, a coating is formed on the steel wire mesh, the rotation of the screen can be controlled or the evaporation source is increased, and the uniformity of evaporation is improved;

when the chemical vapor deposition process is adopted to carry out surface treatment on the steel wire mesh, the precursor is injected into the reaction cavity, the precursor reacts with the steel wires on the screen printing plate to form a coating, and reaction byproducts are discharged along with air flow.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.