阅读说明：本技术 一种网版用网布及其编织方法和使用方法 (Screen cloth for screen printing plate and weaving method and using method thereof ) 是由 黄子祐 于 2021-01-19 设计创作，主要内容包括：本发明提供一种网版用网布的编织方法,将经线与纬线交错编织成网布,且将经线与纬线的夹角控制在15～75度。本发明还提供网版用网布的使用方法。本发明改变无网结织布角度,可提升印刷浆料塑形的完整性并保持网版强度。(The invention provides a weaving method of screen cloth for a screen printing plate, which weaves warps and wefts into the screen cloth in a staggered way, and controls the included angle of the warps and the wefts to be 15-75 degrees. The invention also provides a using method of the screen cloth for the screen printing plate. The invention changes the angle of the non-net knot woven fabric, can improve the shaping integrity of the printing slurry and keep the strength of the screen printing plate.)

1. The weaving method of the screen cloth for the screen plate weaves warps and wefts into the screen cloth in a staggered mode, and is characterized in that the included angle between the warps and the wefts is controlled to be 5-85 degrees.

2. A weaving method of a screen cloth for a screen printing plate according to claim 1, characterized in that an angle between a warp and a weft is controlled to be 15 to 75 degrees.

3. Mesh for screen printing produced by the weaving method according to claim 1 or 2.

4. The method of using the screen cloth for screen printing according to claim 3, comprising the steps of:

the net cloth is stretched on a net frame, and certain tension is given to the net cloth to finish the action of stretching the net; then compounding a polymer plate film on the net cloth after net stretching; then, making strip patterns for printing the finger-shaped electrodes on the polymer plate film, wherein the length direction of the strip patterns is parallel to the warp;

removing the net knots in the strip-shaped pattern area to obtain a net knot-free screen printing plate; or scanning to avoid the net knots when the strip-shaped patterns are manufactured on the polymer screen printing film, and manufacturing the net knot-free screen printing plate.

5. The method for using the screen cloth for the screen printing plate as claimed in claim 4, wherein the material of the polymer plate film layer is PEEK, PAI, PI, PPS, PPSU, PMMA, PSU, PEI, PTFE or PVDF.

6. The method of using the screen cloth for screen printing plate of claim 4, wherein the strip patterns for printing the finger electrodes are made on the polymer plate film by exposure development or laser engraving.

7. The method of using a screen cloth according to claim 4, wherein the knots in the bar pattern regions are removed by etching or laser removal of the screen cloth.

8. The method of using a screen cloth according to claim 4, wherein the non-screen mesh screen is used to print the finger electrodes on the silicon wafer.

9. The method of using a screen cloth for screen printing according to claim 8,

the included angle of the warp and weft is determined according to the rheological property of the sizing agent during printing:

if the rheological property of the sizing agent is that the sizing agent can flow to two sides of the strip-shaped pattern more easily, the included angle between the warp and the weft is controlled to be 5-45 degrees;

if the rheological property of the sizing agent is that the sizing agent can flow towards two ends of the strip-shaped pattern more easily, the included angle between the warp and the weft is controlled to be 45-85 degrees;

if the rheological property of the sizing agent is equal to that of the two sides and the two ends of the strip-shaped pattern, the included angle between the warp and the weft is controlled to be 45 degrees.

10. The method of using the screen cloth for screen printing plate according to claim 9, characterized in that:

if the rheological property of the sizing agent is that the sizing agent can flow to two sides of the strip-shaped pattern more easily, the included angle between the warp and the weft is controlled to be 15-45 degrees;

if the rheological property of the sizing agent is that the sizing agent can flow to two ends of the strip-shaped pattern more easily, the included angle between the warp and the weft is controlled to be 45-75 degrees.

Technical Field

The invention relates to the technical field of screens, in particular to screen cloth for a screen and a weaving method and a using method thereof.

Background

The screen cloth that current solar wafer printing half tone used is 90 degrees for the longitude and latitude contained angle. In response to the SE process of the solar cell, the screen knot in the SE region is removed when the screen printing plate without the screen knot is manufactured, so that the screen yarn in the SE opening forms an included angle of about 90 degrees with the opening. Such screens are limited by the rheological property of the conductive paste during printing, and the molding is easily incomplete under the obstruction of a steel wire mesh area, so that the current of the finally prepared battery piece is reduced and even EL defects are formed.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a weaving method of screen cloth for a screen plate, which weaves warps and wefts into the screen cloth in a staggered manner, and controls the included angle between the warps and the wefts to be 5-85 degrees.

Preferably, the included angle between the warp and the weft is controlled to be 15-75 degrees (more preferably 15-45 degrees or 45-75 degrees).

The invention also provides screen cloth for the screen printing plate, which is manufactured by the weaving method.

The invention provides a using method of the screen cloth for the screen printing plate, which comprises the following steps:

the net cloth is stretched on a net frame, and certain tension is given to the net cloth to finish the action of stretching the net; then compounding a polymer plate film on the net cloth after net stretching; then, making strip patterns for printing the finger-shaped electrodes on the polymer plate film, wherein the length direction of the strip patterns is parallel to the warp;

removing the net knots in the strip-shaped pattern area to obtain a net knot-free screen printing plate; or scanning to avoid the net knots when the strip-shaped patterns are manufactured on the polymer screen printing film, and manufacturing the net knot-free screen printing plate.

Preferably, the material of the polymer plate film layer is PEEK, PAI, PI, PPS, PPSU, PMMA, PSU, PEI, PTFE or PVDF.

Preferably, the strip-shaped patterns for printing the finger electrodes are made on the polymer plate film by means of exposure development or laser engraving.

Preferably, the network knots in the bar pattern areas are removed by etching or laser de-weaving.

Preferably, the finger electrodes are printed on the silicon wafer using a non-mesh screen.

Preferably, the angle between the warp and weft is determined according to the rheology of the paste when printing:

if the rheological property of the sizing agent is that the sizing agent can flow to two sides of the strip-shaped pattern more easily, the included angle between the warp and the weft is controlled to be 5-45 degrees (more preferably 15-45 degrees);

if the rheological property of the sizing agent is that the sizing agent can flow to two ends of the strip-shaped pattern more easily, the included angle between the warp and the weft is controlled to be 45-85 degrees (more preferably 45-75 degrees);

if the rheological property of the sizing agent is equal to that of the two sides and the two ends of the strip-shaped pattern, the included angle between the warp and the weft is controlled to be close to 45 degrees.

The invention has the advantages and beneficial effects that: the invention provides screen cloth for a screen printing plate, a weaving method and a using method thereof.

The invention changes the structure and the manufacturing mode of the screen printing plate without the mesh knots, so that the screen printing plate is more matched with the conductive slurry, and the efficiency of the solar cell is further improved.

The invention has the following characteristics:

1. the included angle of warp and weft when the mesh cloth is woven is changed from 90 degrees to 15-75 degrees, so that the strength of the screen printing plate can be maintained when the finger-shaped electrodes and the steel wires form a certain included angle.

2. The present invention can remove the net junction located in the stripe pattern (finger electrode) region by laser or chemical etching.

3. The invention can also avoid the net knot in a scanning mode to manufacture strip patterns for printing the finger-shaped electrodes.

4. The included angle of the warp and the weft is an appropriate angle, so that the molding integrity of the printing paste can be improved.

Drawings

FIG. 1 is a schematic view of a prior art web;

fig. 2 is a schematic view of a conventional screen;

FIG. 3 is a schematic representation of the paste flow after printing using a prior art screen to print finger electrodes on a silicon wafer;

FIG. 4 is a schematic view of a web of the present invention;

fig. 5 and 6 are schematic views of a screen according to the present invention;

fig. 7 is a schematic representation of the paste rheology after printing using the screen of the present invention to print finger electrodes on a silicon wafer.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. 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.

As shown in fig. 1 to 3, the mesh used by the conventional screen printing plate for printing solar cells has an included angle of 90 degrees between warp and weft, and the screen is limited by the rheological property of the conductive paste during printing, so that incomplete shaping is easily caused by the obstruction of a steel wire mesh region, which leads to the reduction of the current of the finally prepared cell and even the formation of EL defects.

As shown in fig. 4 to 7, the invention provides a method for weaving a mesh cloth for a screen printing plate, wherein warps and wefts are woven into the mesh cloth in a staggered manner, and an included angle between the warps and the wefts is controlled to be 5 to 85 degrees (preferably 15 to 75 degrees, more preferably 15 to 45 degrees or 45 to 75 degrees).

The invention also provides screen cloth for the screen printing plate, which is manufactured by the weaving method, and is shown in figure 4.

The invention provides a using method of the screen cloth for the screen printing plate, which comprises the following steps:

the net cloth is stretched on a net frame, and certain tension is given to the net cloth to finish the action of stretching the net;

then compounding a polymer plate film on the net cloth after net stretching; specifically, the polymer plate film layer is made of PEEK, PAI, PI, PPS, PPSU, PMMA, PSU, PEI, PTFE or PVDF;

then, making strip-shaped patterns for printing the finger-shaped electrodes on the polymer plate film in an exposure development or laser engraving mode, wherein the length direction of the strip-shaped patterns is parallel to the warp;

removing the net knots in the strip-shaped pattern area by etching or laser yarn removal to obtain a net knot-free screen plate, as shown in fig. 5;

or scanning to avoid the net knots when manufacturing the strip-shaped patterns on the polymer screen printing film, and manufacturing the net knot-free screen printing plate as shown in fig. 6.

The non-mesh screen printing plate of the invention can be used for printing finger electrodes on a silicon wafer.

Preferably, the angle between the warp and weft is determined according to the rheology of the paste when printing:

if the rheological property of the sizing agent is that the sizing agent can flow to two sides of the strip-shaped pattern more easily, the included angle between the warp and the weft is controlled to be 5-45 degrees (more preferably 15-45 degrees);

if the rheological property of the sizing agent is that the sizing agent can flow to two ends of the strip-shaped pattern more easily, the included angle between the warp and the weft is controlled to be 45-85 degrees (more preferably 45-75 degrees);

if the rheological property of the sizing agent is equal to that of the two sides and the two ends of the strip-shaped pattern, the included angle between the warp and the weft is controlled to be close to 45 degrees.

Comparing fig. 3 and 7, it can be seen that the present invention can improve the integrity of the printing paste shaping.

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.