A high-tensile white pad for display screen polishing and its production process

Abstract

The present invention discloses a high-tensile white pad for display screen polishing and its production process, belonging to the technical field of polishing pads. A high-tensile white pad for display screen polishing of the present invention comprises a base layer, an adsorption layer and a polishing layer. The adsorption layer includes a supporting mesh member, an adsorption main body and a filter screen layer. The supporting mesh member is bonded to the base layer, the adsorption main body is filled between the supporting mesh members, and the polishing layer is arranged on the upper surface of the filter screen layer. The present invention solves the problem of low tensile property of the existing white pads. The high-tensile white pad for display screen polishing and its production process proposed by the present invention are provided with a supporting mesh member on the adsorption layer. The mesh holes of the supporting mesh member are in a rhombus shape, which improves the tensile property of the supporting mesh member. At the same time, air holes are arranged in the adsorption main body, which increases the tensile property of the white pad. At the same time, the longitudinal structure of the supporting mesh member is not pressed and deformed, reducing the compression rate of the white pad and avoiding excessive height at the corners.

Description

Technical Field

[0001] The present invention relates to the technical field of polishing pads, and particularly to a high-tensile white pad for display screen polishing and its production process. Background Art

[0002] Before leaving the factory, liquid crystal display screens also need to go through a polishing and grinding process. Generally, the equipment for this process usually uses horizontal and vertical axial polishing. This polishing method has a small polishing area, and the fine waste chips generated during polishing are not easily discharged, which is likely to reduce the polishing effect on the surface of the display screen. At the same time, during the polishing process, it is also easy to have a situation where the corners are too high, resulting in the contact between the corners and the polishing surface of the display screen, causing additional damage.

[0003] Chinese Patent with Publication No. CN214559921U discloses a dust-absorbing display screen polishing white pad, which includes a polishing unit, a dust-absorbing layer, an adhesive layer, a support layer, and an outer ring. The polishing unit is connected to the dust-absorbing layer through a pad net. The polishing unit includes a felt layer, a polishing base circle, and a buffer pad. The polishing unit is connected to the dust-absorbing layer through a pad net. The adhesive layer and the support layer are provided below the dust-absorbing layer. The dust-absorbing layer is connected to the support layer through the adhesive layer. The outer edges of the dust-absorbing layer and the support layer are both connected to the outer ring. The polishing units are evenly distributed inside the outer ring.

[0004] Although this patent solves to a certain extent the problem in the background art that the corners are too high, resulting in the contact between the corners and the polishing surface of the display screen, causing additional damage, the tensile property of the white pad in this application is relatively low. During the polishing process, the dust-absorbing layer is easily deformed under extrusion, and the polishing unit is prone to sink, and there will still be a problem of too high corners. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-tensile white pad for display screen polishing and its production process. By setting a support mesh member on the adsorption layer, the mesh shape of the support mesh member is rhombus-shaped, which improves the tensile property of the support mesh member. At the same time, air holes are provided in the adsorption main body, which increases the tensile property of the white pad. At the same time, the longitudinal structure of the support mesh member is not pressed and deformed, reducing the compression rate of the white pad and avoiding too high corners, thus solving the problems raised in the above background art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a high-stretchability white pad for polishing a display screen, comprising a base layer, an adsorption layer and a polishing layer, wherein the adsorption layer comprises a supporting mesh component, an adsorption body and a filter layer, the supporting mesh component is bonded to the base layer, the adsorption body is filled between the supporting mesh components, the filter layer is bonded to the upper surface of the adsorption body, and the polishing layer is arranged on the upper surface of the filter layer, wherein the supporting mesh component is made of the following materials in parts by weight: 10-30 parts of polyurethane rubber, 5-15 parts of natural rubber, 3-5 parts of nano-alumina dispersion, 6-12 parts of mixed fiber material, 1-2 parts of antistatic agent and 2-5 parts of coupling agent.

[0007] Preferably, the mesh shape of the supporting mesh member is diamond-shaped, and an arched hole is opened at the lower end of the supporting mesh member, and the adsorption body is filled in the arched hole.

[0008] Preferably, the mixed fiber material includes Kevlar fiber and carbon fiber, and the ratio of Kevlar fiber to carbon fiber is 1:3.

[0009] Preferably, the adsorption body is made of the following materials in parts by weight: 30-40 parts of toluene diisocyanate, 20-30 parts of polyether diol, 1-3 parts of leveling agent, 1-2 parts of surfactant and 2-5 parts of chain extender.

[0010] Preferably, the upper surface of the base layer is provided with first liquid drain grooves distributed in a mesh shape, and the intersection of the first liquid drain grooves is located at the center of the diamond-shaped mesh holes of the supporting mesh component.

[0011] Preferably, the base layer is made of the following materials in parts by weight: 20-30 parts of silica gel, 3-8 parts of nitrile rubber, 2-10 parts of polyurethane rubber, and 3-5 parts of rubber additives.

[0012] Preferably, the polishing layer is provided with obliquely staggered second drainage grooves, which are located directly above the supporting mesh member, and the second drainage grooves correspond to the distribution positions of the supporting mesh member, and the width of the second drainage grooves is smaller than the width of the supporting mesh member.

[0013] Preferably, the polishing layer is made of the following materials in parts by weight: 20-40 parts of water-based epoxy resin glue, 10-20 parts of polyurethane rubber, 2-3 parts of titanium dioxide, 1-2 parts of zinc oxide, 1-2 parts of calcium carbonate and 3-5 parts of aluminum oxide.

[0014] Preferably, the filter layer is woven from nylon fiber, aramid fiber and carbon fiber.

[0015] Another technical problem to be solved by the present invention is to provide a production process of a high-stretchability white pad for display screen polishing, comprising the following steps:

[0016] S1 Preparation of base layer:

[0017] After mixing the proportioned silica gel, nitrile rubber, polyurethane rubber, and rubber additives evenly, put them into a kneader for kneading. The kneading temperature is 80 - 150 °C. After kneading for 5 minutes, obtain the base layer;

[0018] S2 Prepare the adsorption layer:

[0019] S21: After mixing polyurethane rubber, natural rubber, nano-aluminum oxide dispersion, mixed fiber material, antistatic agent, and coupling agent evenly, pour them into a mold to make a support mesh member;

[0020] S22: Bond and fix the support mesh member to the base layer through TPU hot melt adhesive, and open arched holes and the first drain groove on the support mesh member and the base layer;

[0021] S23: Plain weave nylon fiber, aramid fiber, and carbon fiber with a warp density and weft density of 40 threads / cm to make a filter screen layer;

[0022] S24: Mix toluene diisocyanate, polyether diol, leveling agent, surfactant, and chain extender to make polyurethane foam stock solution for standby;

[0023] S3 Prepare the polishing layer:

[0024] After mixing water-based epoxy resin glue, polyurethane rubber, titanium dioxide, zinc oxide, calcium carbonate, and alumina materials evenly, put them into a mold for curing to obtain the polishing layer;

[0025] S4 Combine and process:

[0026] S41: Place the base layer, filter screen layer, and polishing layer in order from bottom to top and press them tightly. Flip the placed base layer, filter screen layer, and polishing layer as a whole so that the base layer is upward, put them into a mold and fix the position;

[0027] S42: Fill the space enclosed between the support mesh member and the filter screen layer with polyurethane foam stock solution through the first drain groove. Spray deionized water during the process of filling the polyurethane foam stock solution until the surface of the polyurethane foam stock solution is flush with the surface of the base layer;

[0028] S43: Dry and demold the whole mold to obtain the base layer, filter screen layer, and polishing layer connected together. Open the second drain groove on the surface of the polishing layer to obtain the manufactured white pad.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1. The present invention includes a base layer, an adsorption layer, and a polishing layer. A supporting mesh member is provided on the adsorption layer, and the mesh holes of the supporting mesh member are rhombus-shaped, which improves the stretchability of the supporting mesh member. At the same time, air holes are provided in the adsorption main body, increasing the stretchability of the white pad. Meanwhile, the longitudinal structure of the supporting mesh member is not pressed and deformed, reducing the compression rate of the white pad and avoiding excessive height at the corners.

[0031] 2. The base layer, adsorption layer, and polishing layer of the present invention all contain polyurethane rubber, which has good stretchability. And a nano-aluminum oxide dispersion liquid and a mixed fiber material are added to the supporting mesh member, further improving the stretchability of the supporting mesh member. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the overall structure diagram of the white pad of the present invention;

[0033] Figure 2 is the partial cross-sectional view of the white pad of the present invention;

[0034] Figure 3 is the exploded view of the white pad of the present invention;

[0035] Figure 4 is the partial cross-sectional view of the white pad of the present invention.

[0036] In the figure: 1. Base layer; 11. First liquid drainage groove; 2. Adsorption layer; 21. Supporting mesh member; 22. Adsorption main body; 23. Filter mesh layer; 3. Polishing layer; 31. Second liquid drainage groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment 1:

[0038] In order to solve the problem that the existing white pad has low stretchability, during the polishing process, the dust absorption layer is easily deformed under extrusion, and the polishing unit is prone to sink, and there is still a problem of excessive height at the corners. Please refer to Figures 1 - 4 , the following technical solutions are provided in this embodiment:

[0039] A high-stretchability white pad for polishing a display screen comprises a base layer 1, an adsorption layer 2 and a polishing layer 3, wherein the adsorption layer 2 comprises a supporting mesh member 21, an adsorption body 22 and a filter layer 23, the supporting mesh member 21 is bonded to the base layer 1, the adsorption body 22 is filled between the supporting mesh members 21, the filter layer 23 is bonded to the upper surface of the adsorption body 22, and the polishing layer 3 is arranged on the upper surface of the filter layer 23, wherein the supporting mesh member 21 is made of the following materials in parts by weight: 30 parts of polyurethane rubber, 5 parts of natural rubber, 3 parts of nano-alumina dispersion, 6 parts of mixed fiber material, 1 part of antistatic agent and 2 parts of coupling agent.

[0040] The mesh shape of the supporting mesh member 21 is a diamond shape, and an arched hole is opened at the lower end of the supporting mesh member 21, and the adsorption body 22 is filled in the arched hole.

[0041] Specifically, the adsorption body 22 is divided into a block structure by the supporting mesh component 21. The adsorption body 22 is filled in the arched hole, and the block-shaped adsorption body 22 can be connected into an integral structure. When the supporting mesh component 21 is stretched, the adsorption body 22 can be squeezed to squeeze out the adsorbed moisture.

[0042] The mixed fiber material includes Kevlar fiber and carbon fiber, and the ratio of Kevlar fiber to carbon fiber is 1:3. The high strength of Kevlar fiber and carbon fiber can help the longitudinal structure of the supporting mesh component 21 not be compressed and deformed. At the same time, with the shape of the supporting mesh component 21, the lateral tensile strength of the supporting mesh component 21 can be improved.

[0043] The adsorption body 22 is made of the following materials in parts by weight: 40 parts of toluene diisocyanate, 20 parts of polyether diol, 3 parts of leveling agent, 1 part of surfactant and 3 parts of chain extender. The prepared adsorption body 22 itself has certain pores, has strong adsorption performance, and also has tensile properties.

[0044] The upper surface of the base layer 1 is provided with first liquid drain grooves 11 distributed in a mesh shape, and the intersection of the first liquid drain grooves 11 is located at the center of the diamond-shaped mesh holes of the supporting mesh member 21 .

[0045] Specifically, the first liquid drain groove 11 corresponds to the position of the arch hole. When the supporting mesh member 21 is stretched, it can drive the adsorption body 22 to stretch. The squeezed adsorption body 22 deforms to squeeze out the adsorbed water and discharge it through the first liquid drain groove 11.

[0046] The base layer 1 is made of the following materials in parts by weight: 30 parts of silicone, 8 parts of nitrile rubber, 2 parts of polyurethane rubber, and 3 parts of rubber additives. The prepared base layer 1 has strong elasticity, can improve the stretchability of the entire white pad, and can prevent the problem of excessively high corners during the polishing process.

[0047] The polishing layer 3 is provided with second drain grooves 31 which are arranged obliquely and staggered. The second drain grooves 31 are located directly above the supporting mesh member 21, and the distribution positions of the second drain grooves 31 correspond to those of the supporting mesh member 21. The width of the second drain grooves 31 is smaller than the width of the supporting mesh member 21.

[0048] Specifically, when the polishing layer 3 is polishing, it is in direct contact with the surface of the display screen. The polishing layer 3 is divided into block structures by the second drain grooves 31. Dust and polishing liquid generated during the polishing process are discharged through the second drain grooves 31. The supporting mesh member 21 is not connected to the block-shaped polishing layer 3. When the supporting mesh member 21 is stretched, it affects the polishing layer 3 through the adsorption main body 22. The supporting mesh member 21 undergoes tensile deformation without deforming the polishing layer 3, thus improving the service life of the polishing layer 3.

[0049] The polishing layer 3 is made of the following materials in parts by weight: 20 parts of water-based epoxy resin glue, 10 parts of polyurethane rubber, 2 parts of titanium dioxide, 2 parts of zinc oxide, 1 part of calcium carbonate, and 3 parts of aluminum oxide.

[0050] The filter screen layer 23 is woven from nylon fiber, aramid fiber, and carbon fiber.

[0051] In order to better show the production process of a highly stretchable white pad for display screen polishing, the present embodiment now proposes a production process of a highly stretchable white pad for display screen polishing, including the following steps:

[0052] S1 Prepare the base layer 1:

[0053] After mixing the proportioned silica gel, nitrile rubber, polyurethane rubber, and rubber additives evenly, put them into a kneader for kneading. The kneading temperature is 120 °C. After kneading for 5 minutes, the base layer 1 is obtained;

[0054] S2 Prepare the adsorption layer 2:

[0055] S21: After mixing polyurethane rubber, natural rubber, nano-aluminum oxide dispersion liquid, mixed fiber material, antistatic agent, and coupling agent evenly, pour them into a mold to make the supporting mesh member 21;

[0056] S22: Bond and fix the supporting mesh member 21 to the base layer 1 through TPU hot melt adhesive, and open arched holes and first drain grooves 11 on the supporting mesh member 21 and the base layer 1;

[0057] S23: Weave nylon fiber, aramid fiber, and carbon fiber according to a plain weave with a warp density and a weft density of 40 roots / cm to make the filter screen layer 23;

[0058] S24: Mix toluene diisocyanate, polyether glycol, leveling agent, surfactant, and chain extender to make polyurethane foam stock solution for standby;

[0059] S3 Prepare the polishing layer 3:

[0060] After uniformly mixing water-based epoxy resin glue, polyurethane rubber, titanium dioxide, zinc oxide, calcium carbonate and alumina materials, put them into a mold for curing to obtain the polishing layer 3;

[0061] S4 Consolidation process:

[0062] S41: Place the base layer 1, the filter screen layer 23 and the polishing layer 3 in order from bottom to top and press them tightly. Then turn the assembled base layer 1, filter screen layer 23 and polishing layer 3 over so that the base layer 1 is facing up, put them into a mold and fix their positions;

[0063] S42: Fill the space enclosed between the support mesh member 21 and the filter screen layer 23 with polyurethane foam stock solution through the first drain tank 11. During the filling process of the polyurethane foam stock solution, spray deionized water until the surface of the polyurethane foam stock solution is flush with the surface of the base layer 1;

[0064] S43: Dry and demold the whole mold to obtain the base layer 1, the filter screen layer 23 and the polishing layer 3 connected together. Open a second drain tank 31 on the surface of the polishing layer 3 to obtain the finished white pad. Example 2:

[0065] Use the following material ratio and prepare the white pad by the method in Example 1.

[0066] The base layer 1 is made of the following materials by weight: 30 parts of silica gel, 8 parts of nitrile rubber, 2 parts of polyurethane rubber, 3 parts of rubber additives;

[0067] The support mesh member 21 is made of the following materials by weight: 30 parts of polyurethane rubber, 5 parts of natural rubber, 5 parts of nano-alumina dispersion liquid, 6 parts of mixed fiber material, 1 part of antistatic agent and 2 parts of coupling agent;

[0068] The adsorption main body 22 is made of the following materials by weight: 40 parts of toluene diisocyanate, 20 parts of polyether diol, 3 parts of leveling agent, 1 part of surfactant and 3 parts of chain extender;

[0069] The polishing layer 3 is made of the following materials by weight: 20 parts of water-based epoxy resin glue, 10 parts of polyurethane rubber, 2 parts of titanium dioxide, 2 parts of zinc oxide, 1 part of calcium carbonate and 3 parts of alumina. Example 3:

[0070] Use the following material ratio and prepare the white pad by the method in Example 1.

[0071] The base layer 1 is made of the following materials by weight: 30 parts of silica gel, 8 parts of nitrile rubber, 2 parts of polyurethane rubber, 3 parts of rubber additives;

[0072] The supporting mesh member 21 is made of the following materials by weight: 30 parts of polyurethane rubber, 5 parts of natural rubber, 3 parts of nano-aluminum oxide dispersion, 12 parts of mixed fiber material, 1 part of antistatic agent, and 2 parts of coupling agent;

[0073] The adsorption main body 22 is made of the following materials by weight: 40 parts of toluene diisocyanate, 20 parts of polyether diol, 3 parts of leveling agent, 1 part of surfactant, and 3 parts of chain extender;

[0074] The polishing layer 3 is made of the following materials by weight: 20 parts of water-based epoxy resin glue, 10 parts of polyurethane rubber, 2 parts of titanium dioxide, 2 parts of zinc oxide, 1 part of calcium carbonate, and 3 parts of alumina.

[0075] Comparative Example 1:

[0076] In this comparative example, the base layer 1 is made of the following materials by weight: 30 parts of silica gel, 8 parts of nitrile rubber, 2 parts of polyurethane rubber, and 3 parts of rubber additives;

[0077] The adsorption main body 22 is made of the following materials by weight: 40 parts of toluene diisocyanate, 20 parts of polyether diol, 3 parts of leveling agent, 1 part of surfactant, and 3 parts of chain extender;

[0078] The polishing layer 3 is made of the following materials by weight: 20 parts of water-based epoxy resin glue, 10 parts of polyurethane rubber, 2 parts of titanium dioxide, 2 parts of zinc oxide, 1 part of calcium carbonate, and 3 parts of alumina.

[0079] Steps S21 and S22 in Example 1 are omitted in the method for preparing the white pad. In the combined treatment of step S4, the adsorption main body 22 is directly sprayed on the surface of the base layer 1 through a mold, and the filter screen layer 23 is covered on the adsorption main body 22 and connected to the coated adsorption main body 22. The polishing layer 3 is connected to the surface of the filter screen layer 23, and then drying and demolding treatment is carried out to make the white pad.

[0080] The component comparisons of the above Example 1, Example 2, Example 3, and Comparative Example 1 are shown in Table 1 below.

[0081] Table 1: Composition comparison results of each example and comparative example

[0082]

[0083] As can be seen from Table 1 above, compared with Example 1, the share of nano-aluminum oxide dispersion is increased in Example 2, and the share of mixed fiber material is increased in Example 3 compared with Example 1. In Comparative Example 1, the component of the supporting mesh member 21 is cancelled.

[0084] The white pads prepared above are tested, and the following data are obtained, as shown in Table 2:

[0085] Table 2: Performance test results of each example and comparative example

[0086] Example 1 Example 2 Example 3 Comparative Example 1 Extrusion force (N) 40 40 40 40 Compression ratio (%) 25 24 23 35 Compression resilience ratio (%) 95 96 97 72 Tensile force (N) 25 25 25 25 Tensile ratio (%) 225 226 229 152 Tensile resilience ratio (%) 97 98 98 70

[0087] It can be seen from Table 2 above that the white pads made in Examples 1 to 3 have lower compressibility and higher stretchability compared with the white pads made in Comparative Example 1. When pressing the white pads made in Examples 1 to 3, the white pads made in Examples 1 to 3 are not easily deformed by pressing and can have a higher rebound rate after stretching, indicating that the supporting mesh member 21 has strong stretchability.

[0088] The proportions of nano-aluminum oxide dispersion liquid and mixed fiber material are respectively increased in Example 2 and Example 3. Compared with Example 1, the white pads in Example 2 and Example 3 have lower compression rates and are not easily deformed by pressing. At the same time, the white pads in Example 2 and Example 3 have higher stretch rates. Both the nano-aluminum oxide dispersion liquid and the mixed fiber material can improve the stretchability of the white pads.

[0089] In summary: A high-stretchability white pad for display screen polishing and its production process proposed by the present invention include a base layer 1, an adsorption layer 2 and a polishing layer 3. A supporting mesh member 21 is arranged on the adsorption layer 2. The mesh holes of the supporting mesh member 21 are rhombus-shaped, which improves the stretchability of the supporting mesh member 21. At the same time, air holes are arranged in the adsorption main body 22, which increases the stretchability of the white pad. At the same time, the longitudinal structure of the supporting mesh member 21 is not deformed by pressing, reducing the compression rate of the white pad and avoiding excessive height at the corners; the base layer 1, the adsorption layer 2 and the polishing layer 3 all contain polyurethane rubber, which has good stretchability, and a nano-aluminum oxide dispersion liquid and a mixed fiber material are added to the supporting mesh member 21, further improving the stretchability of the supporting mesh member 21.

[0090] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to this process, method, article or device.

[0091] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-tensile white pad for polishing a display screen, comprising a base layer (1), an adsorption layer (2) and a polishing layer (3), characterized in that: The adsorption layer (2) includes a supporting mesh member (21), an adsorption main body (22), and a filter screen layer (23). The supporting mesh member (21) is bonded to the base layer (1). The adsorption main body (22) is filled between the supporting mesh members (21). The filter screen layer (23) is bonded to the upper surface of the adsorption main body (22). A polishing layer (3) is provided on the upper surface of the filter screen layer (23). Among them, the supporting mesh member (21) is made of the following parts by weight of materials: 10-30 parts of polyurethane rubber, 5-15 parts of natural rubber, 3-5 parts of nano-aluminum oxide dispersion liquid, 6-12 parts of mixed fiber material, 1-2 parts of antistatic agent, and 2-5 parts of coupling agent; the mesh hole shape of the supporting mesh member (21) is rhomboid, an arched hole is opened at the lower end of the supporting mesh member (21), and the adsorption main body (22) is filled in the arched hole. A first drainage groove (11) distributed in a mesh shape is opened on the upper surface of the base layer (1), and the intersection point of the first drainage grooves (11) is located at the center of the rhomboid mesh hole of the supporting mesh member (21).

2. The high-tensile white pad for polishing a display screen according to claim 1, wherein: The mixed fiber material includes Kevlar fiber and carbon fiber, and the ratio of Kevlar fiber to carbon fiber is 1:

3.

3. The high-tensile white pad for polishing a display screen according to claim 2, wherein: The adsorption main body (22) is made of the following parts by weight of materials: 30-40 parts of toluene diisocyanate, 20-30 parts of polyether diol, 1-3 parts of leveling agent, 1-2 parts of surfactant, and 2-5 parts of chain extender.

4. The high-tensile white pad for polishing a display screen according to claim 3, characterized in that: The base layer (1) is made of the following parts by weight of materials: 20-30 parts of silica gel, 3-8 parts of nitrile rubber, 2-10 parts of polyurethane rubber, and 3-5 parts of rubber additives.

5. The high-tensile white pad for polishing a display screen according to claim 4, characterized in that: Oblique and staggered second drainage grooves (31) are opened on the polishing layer (3). The second drainage grooves (31) are located directly above the supporting mesh member (21), and the distribution positions of the second drainage grooves (31) correspond to those of the supporting mesh member (21). The width of the second drainage grooves (31) is smaller than the width of the supporting mesh member (21).

6. The high-tensile white pad for polishing a display screen according to claim 5, wherein: The polishing layer (3) is made of the following parts by weight of materials: 20-40 parts of water-based epoxy resin glue, 10-20 parts of polyurethane rubber, 2-3 parts of titanium dioxide, 1-2 parts of zinc oxide, 1-2 parts of calcium carbonate, and 3-5 parts of aluminum oxide.

7. The high-tensile white pad for polishing a display screen according to claim 6, characterized in that: The filter screen layer (23) is woven from nylon fiber, aramid fiber, and carbon fiber.

8. The production process of a high-tensile white pad for display screen polishing as described in claim 7, characterized in that, Including the following steps: S1 Prepare the base layer (1): After mixing the proportioned silica gel, nitrile rubber, polyurethane rubber, and rubber additives evenly, put them into a kneader for kneading. The kneading temperature is 80-150 °C. After kneading for 5 minutes, the base layer (1) is obtained; S2 Prepare the adsorption layer (2): S21: After mixing the polyurethane rubber, natural rubber, nano-aluminum oxide dispersion liquid, mixed fiber material, antistatic agent, and coupling agent evenly, pour them into a mold to make the supporting mesh member (21); S22: Bond and fix the supporting mesh member (21) to the base layer (1) through TPU hot melt adhesive, and open an arched hole and a first drainage groove (11) on the supporting mesh member (21) and the base layer (1); S23: Weave nylon fiber, aramid fiber, and carbon fiber into a plain weave with both the warp density and the weft density of 40 threads / cm to make the filter screen layer (23); S24: Mix toluene diisocyanate, polyether diol, leveling agent, surfactant and chain extender to prepare polyurethane foaming stock solution for standby; S3 Prepare the polishing layer (3): After uniformly mixing waterborne epoxy resin glue, polyurethane rubber, titanium dioxide, zinc oxide, calcium carbonate and alumina materials, put them into a mold for curing to obtain the polishing layer (3); S4 Combine and process: S41: Place the base layer (1), the filter screen layer (23) and the polishing layer (3) in order from bottom to top and press them tightly. Then turn the placed base layer (1), filter screen layer (23) and polishing layer (3) as a whole so that the base layer (1) faces upward, put them into a mold and fix their positions; S42: Fill the space enclosed between the support mesh member (21) and the filter screen layer (23) with polyurethane foaming stock solution through the first drain groove (11). During the process of filling the polyurethane foaming stock solution, spray deionized water until the polyurethane foaming stock solution is flush with the surface of the base layer (1); S43: Dry and demold the whole mold to obtain the base layer (1), the filter screen layer (23) and the polishing layer (3) connected together. Open a second drain groove (31) on the surface of the polishing layer (3) to obtain the finished white pad.

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