A waterproof single-sided felt polishing pad for glass polishing and its production process

Abstract

The present invention discloses a waterproof single-sided felt polishing pad for glass polishing and its production process, belonging to the technical field of polishing pads. A waterproof single-sided felt polishing pad for glass polishing according to the present invention comprises a base layer, a waterproof layer and a polishing layer. The waterproof layer is provided with a curved surface top and a lower surrounding ring. The lower end of the curved surface top is integrally formed with the upper end of the lower surrounding ring. The base layer is arranged inside the lower surrounding ring. The upper surface of the curved surface top is fixedly connected with the polishing layer. The polishing layer comprises a non-woven fabric base layer and a flocking layer. The present invention solves the problems of rapid wear and short service life of the existing base pads. A waterproof single-sided felt polishing pad for glass polishing and its production process proposed by the present invention have the flocking layer arranged on the side of the non-woven fabric base layer away from the waterproof layer. The gaps in the flocking layer are relatively large. The impregnation method is adopted to enable the non-woven fabric base layer and the flocking layer to adhere to more abrasive adhesives, improving the hardness of the polishing pad and reducing the wear of the polishing pad.

Description

Technical Field

[0001] The present invention relates to the technical field of polishing pads, and particularly to a waterproof single-sided felted wool polishing pad for glass polishing and its production process. Background Art

[0002] Rare earth cerium polishing powder is widely used in the polishing of camera lenses, camera lenses, television picture tubes, spectacle lenses, etc. In recent years, with the rapid development of the 3C electronic product field such as glass mobile phone cases, screens, integrated circuit boards, etc., glass polishing materials have broad application prospects.

[0003] Chinese Patent with Publication No. CN111941271B discloses a glass polishing pad and its preparation method, including a carrier pad and an abrasive adhesive attached to the surface and gaps of the carrier pad. The abrasive adhesive comprises the following raw materials in parts by weight: 15 - 30 parts of polyether monomer, 1 - 5 parts of isocyanate, 25 - 40 parts of abrasive, 3 - 7 parts of pore-forming agent, and 15 - 30 parts of solvent.

[0004] Although this application solves to a certain extent the technical problem of using cerium oxide polishing powder in the background art, preparing it into a solution and then polishing with a polishing pad, the overall structure of this application is simple, the base pad wears quickly, the service life is short, and at the same time, it does not have a waterproof function and the base pad ages quickly. Summary of the Invention

[0005] The purpose of the present invention is to provide a waterproof single-sided felted wool polishing pad for glass polishing and its production process. By providing a waterproof layer, the service life of the base layer is extended. The impregnation method is adopted to enable the non-woven fabric base layer and the flocked layer to adhere to more abrasive adhesives, improving the hardness of the polishing pad and reducing the wear of the polishing pad, thus solving the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A waterproof single-sided felted wool polishing pad for glass polishing, including a base layer, a waterproof layer, and a polishing layer. The waterproof layer is provided with a curved surface top and a lower surrounding ring. The lower end of the curved surface top is integrally formed with the upper end of the lower surrounding ring. The base layer is arranged inside the lower surrounding ring. The upper surface of the curved surface top is fixedly connected to the polishing layer. The polishing layer includes a non-woven fabric base layer and a flocked layer. Abrasive adhesives are attached to the surfaces and gaps of the non-woven fabric base layer and the flocked layer. The abrasive adhesive is made from the following raw materials in parts by weight: 20 - 40 parts of water-based epoxy resin glue, 10 - 20 parts of polyurethane rubber, 15 - 20 parts of cerium oxide, 10 - 15 parts of alumina, 2 - 3 parts of titanium dioxide, 1 - 2 parts of zinc oxide, and 1 - 2 parts of calcium carbonate.

[0007] Preferably, the non-woven fabric base layer is made of polypropylene pellets and polyurethane particles. They are respectively heated, melted, and extruded into a melt by a screw extruder. The two melts are extruded from the spinneret holes of the die head in opposite directions and are blown by hot air currents on both sides of the spinneret holes. The melt is stretched into warp ultra-fine fibers and forms a non-woven fabric base layer through self-bonding.

[0008] Preferably, the flocked layer is made of nylon fluff, the thickness of the flocked layer is 0.5 - 2 mm, and the flocked layer is arranged on the side of the non-woven fabric base layer away from the waterproof layer.

[0009] Preferably, both the arc-shaped top and the lower collar are composed of two layers of polypropylene waterproof membranes sandwiching a polyethylene high-molecular breathable membrane, and the surface of the arc-shaped top is a curved surface structure.

[0010] Preferably, a groove is provided on the inner wall of the lower collar.

[0011] Preferably, the lower surface of the base layer is flush with the lower end of the lower collar, and a raised ring is provided on the side wall of the base layer. The raised ring is engaged with the groove.

[0012] Preferably, the side of the base layer connected to the arc-shaped top is a curved surface structure with a central protrusion.

[0013] Preferably, the base layer is made of the following raw materials in parts by weight: 30 - 40 parts of nylon fiber, 15 - 25 parts of spandex fiber, and 20 - 30 parts of polyester fiber.

[0014] Another technical problem to be solved by the present invention is to provide a production process of a waterproof single-sided felt polishing pad for glass polishing, including the following steps:

[0015] S1 Preparation of the base layer: Stack the woven nylon fiber, spandex fiber, and polyester fiber cloth and bond them into a base layer;

[0016] S2 Waterproof layer:

[0017] Heat, melt, and extrude the polypropylene waterproof membrane material and the polyethylene high-molecular breathable membrane into a melt respectively, and spray a layer of polypropylene waterproof membrane material on the upper surface and the side wall of the base layer;

[0018] After the polypropylene waterproof membrane is dried, spray a layer of polyethylene high-molecular breathable membrane on the surface of the polypropylene waterproof membrane, and gradually increase the thickness of the polyethylene high-molecular breathable membrane at the central position of the polyethylene high-molecular breathable membrane on the upper surface of the base layer, so that its height gradually decreases from the center to the edge position;

[0019] Spray a layer of polypropylene waterproof membrane material on the surface of the dried polyethylene high-molecular breathable membrane, and thickly coat the polypropylene waterproof membrane at the corresponding position on the side wall of the lower collar 22, so that the outer surface of the outer layer of polypropylene waterproof membrane forms a smooth cylindrical shape;

[0020] S3 Polishing Layer:

[0021] Fluff nylon fibers with a thickness of 0.5 - 2 mm on one side of the surface of the non-woven fabric base layer, and then perform water washing and drying treatments to make a flocked layer;

[0022] Mix and stir water-based epoxy resin glue, polyurethane rubber, cerium oxide, alumina, titanium dioxide, zinc oxide, and calcium carbonate to make a liquid abrasive adhesive;

[0023] Immerse the non-woven fabric base layer with the flocked layer adhered to it as a whole into the abrasive adhesive. During the immersion process, extrude it, and after extruding 4 - 5 times repeatedly, take it out and extrude until no liquid comes out, and perform preliminary curing;

[0024] Immerse the cured polishing layer into the abrasive adhesive again. After immersing for 2 - 5 minutes, take it out, squeeze out the liquid, and perform drying and curing;

[0025] S4 Assembly: Coat the lower surface of the polishing layer with hot melt adhesive, and hot press the polishing layer onto the surface of the waterproof layer 2, and cut the upper surface of the polishing layer to ensure that the surface of the flocked layer is flat.

[0026] Preferably, the specific steps for preparing the base layer in S1 are as follows:

[0027] Take nylon fiber, spandex fiber, and polyester fiber materials with a diameter of 0.01 - 0.015 mm, and weave them according to a warp density and a weft density of 40 threads / cm to make nylon fiber cloth, spandex fiber cloth, and polyester fiber cloth;

[0028] Stack the nylon fiber cloth, spandex fiber cloth, and polyester fiber cloth in sequence, coat and adhere glue between each layer of fiber cloth, and hot press them into an integral base;

[0029] Perform curved surface cutting on the upper end of the integral base to make the center position of the upper end of the integral base high and the edge position low. At the same time, cut out a raised ring structure on the side wall of the integral base to make a base layer, and perform water washing and drying on the base layer to remove waste chips and particles.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] 1. By providing a waterproof layer in the present invention, the polyethylene polymer breathable film corresponding to the arc-shaped top has a center thickness towards the edge thickness, so that the side of the arc-shaped top connected to the non-woven fabric base layer is a curved surface structure, which improves the hydrophobicity of the surface of the arc-shaped top. The base layer and the arc-shaped top are connected through a curved surface, which can increase the connection area and enhance the firmness of the connection between the base layer and the arc-shaped top. The lower surrounding ring provides waterproofness for the side wall of the base layer and extends the service life of the base layer;

[0032] 2. The polishing layer of the present invention includes a non-woven fabric base layer and a flocked layer. The flocked layer is arranged on the side of the non-woven fabric base layer away from the waterproof layer. The gaps in the flocked layer are relatively large. By using the impregnation method, the non-woven fabric base layer and the flocked layer can adhere to more abrasive adhesives, improving the hardness of the polishing pad and reducing the wear of the polishing pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is an exploded view of the polishing pad of the present invention;

[0034] Figure 2 is a cross-sectional view of the polishing pad of the present invention;

[0035] Figure 3 is an enlarged view of part A of the present invention.

[0036] In the figure: 1, base layer; 11, raised ring; 2, waterproof layer; 21, arc top; 22, lower collar; 3, polishing layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to 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 of 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] To solve the existing problems, please refer to Figures 1 - 3 , the following technical solutions are provided in this embodiment:

[0039] A waterproof single-sided felt flocked polishing pad for glass polishing, including a base layer 1, a waterproof layer 2 and a polishing layer 3. The side of the base layer 1 connected to the arc top 21 is a curved surface structure that bulges in the center. The base layer 1 is connected to the arc top 21 through a curved surface, which can increase the connection area and enhance the firmness of the connection between the base layer 1 and the arc top 21.

[0040] The base layer 1 is made of the following raw materials in parts by weight: 40 parts of nylon fiber, 20 parts of spandex fiber, and 25 parts of polyester fiber. It has good elasticity and strong wrinkle resistance.

[0041] The waterproof layer 2 is provided with an arc top 21 and a lower collar 22. The lower end of the arc top 21 is integrally formed with the upper end of the lower collar 22. The base layer 1 is arranged inside the lower collar 22, and the upper surface of the arc top 21 is fixedly connected to the polishing layer 3.

[0042] Both the arc top 21 and the lower collar 22 are composed of two layers of polypropylene waterproof membranes sandwiching a polyethylene high-molecular breathable membrane, and the surface of the arc top 21 is a curved surface structure.

[0043] Specifically, both polypropylene and polyethylene have a certain elasticity. The main function of the polypropylene waterproof film is to enhance the tensile strength and hydrostatic pressure and protect the intermediate polyethylene polymer breathable film. The breathable performance is achieved through the polyethylene polymer breathable film. The polyethylene polymer breathable film corresponding to the arc-shaped top 21 has a central thickness that gradually decreases towards the edge thickness, so that the side of the arc-shaped top 21 connected to the non-woven fabric base layer is a curved surface structure, improving the hydrophobicity.

[0044] A groove is provided on the inner wall of the lower peripheral ring 22.

[0045] The lower surface of the base layer 1 is flush with the lower end of the lower peripheral ring 22. A raised ring 11 is provided on the side wall of the base layer 1, and the raised ring 11 is engaged with the groove.

[0046] Specifically, the engagement of the raised ring 11 with the groove increases the connection area between the base layer 1 and the inner wall of the lower peripheral ring 22, enhances the firmness of the connection between the base layer 1 and the lower peripheral ring 22, and the lower peripheral ring 22 provides waterproofing for the side wall of the base layer 1, extending the service life of the base layer 1.

[0047] The polishing layer 3 includes a non-woven fabric base layer and a flocking layer. Abrasive adhesives are attached to the surfaces and gaps of the non-woven fabric base layer and the flocking layer. The abrasive adhesive is made from the following raw materials by weight:

[0048] 20 parts of water-based epoxy resin glue, 10 parts of polyurethane rubber, 20 parts of cerium oxide, 12 parts of alumina, 2 parts of titanium dioxide, 1 part of zinc oxide, and 2 parts of calcium carbonate.

[0049] The non-woven fabric base layer uses polypropylene pellets and polyurethane particles as raw materials. They are respectively heated, melted, and extruded into a melt by a screw extruder. The two melts are extruded towards each other from the spinneret holes of the die head and are blown by hot air flows on both sides of the spinneret holes. The melt is stretched into warp ultra-fine fibers and forms a non-woven fabric base layer through self-bonding. The material ratio of polypropylene and polyurethane materials is 2:1.

[0050] Specifically, the polypropylene material is light in weight, has excellent tensile strength, compressive strength, and hardness, and outstanding rigidity and flexural fatigue resistance. Adding polypropylene material to the polypropylene material can improve the stability of the non-woven fabric base layer, be wear-resistant and aging-resistant, and also enhance the elasticity of the non-woven fabric base layer.

[0051] The flocking layer is made of nylon fluff, and the thickness of the flocking layer is 1 mm. The flocking layer is arranged on the side of the non-woven fabric base layer away from the waterproof layer 2. The gaps in the flocking layer are relatively large, and it can adhere more abrasive adhesives.

[0052] In order to better demonstrate the production process of a waterproof single-sided felt flocking polishing pad for glass polishing, this embodiment now proposes a production process of a waterproof single-sided felt flocking polishing pad for glass polishing, including the following steps:

[0053] S1 Preparation of the base layer 1:

[0054] Take nylon fiber, spandex fiber and polyester fiber materials with a diameter of 0.01 - 0.015 mm, and weave them according to a warp density and a weft density of 40 threads / cm to make nylon fiber cloth, spandex fiber cloth and polyester fiber cloth;

[0055] Stack them in the order of nylon fiber cloth, spandex fiber cloth and polyester fiber cloth, coat adhesive glue between each layer of fiber cloth, and hot-press them into an integral base;

[0056] Perform curved surface cutting on the upper end of the integral base so that the center position of the upper end of the integral base is high and the edge position is low. At the same time, cut out the convex ring 11 structure on the side wall of the integral base to make the base layer 1, and wash and dry the base layer 1 to remove waste chips and particles.

[0057] S2 Waterproof layer 2:

[0058] Heat, melt and extrude the polypropylene waterproof membrane material and the polyethylene high molecular breathable membrane into a melt respectively, and spray a layer of polypropylene waterproof membrane material on the upper surface and the side wall of the base layer 1;

[0059] After the polypropylene waterproof membrane is dried, spray a layer of polyethylene high molecular breathable membrane on the surface of the polypropylene waterproof membrane, and gradually increase the thickness of the polyethylene high molecular breathable membrane at the center position of the upper surface of the base layer 1, so that its height gradually decreases from the center to the edge position;

[0060] Spray a layer of polypropylene waterproof membrane material on the surface of the dried polyethylene high molecular breathable membrane, and thickly coat the corresponding position of the polypropylene waterproof membrane on the side wall of the lower periphery 22, so that the outer surface of the outer layer of polypropylene waterproof membrane is in a smooth cylindrical shape;

[0061] S3 Polishing layer 3:

[0062] Flock 1 mm thick nylon fluff on one side of the non-woven fabric base layer, and then perform washing and drying treatment to make a flocked layer;

[0063] Mix and stir water-based epoxy resin glue, polyurethane rubber, cerium oxide, alumina, titanium dioxide, zinc oxide and calcium carbonate to make a liquid abrasive adhesive;

[0064] Immerse the non-woven fabric base layer bonded with the flocked layer as a whole into the abrasive adhesive. During the immersion process, extrude it, and after extruding 4 - 5 times, take it out and extrude until no liquid comes out, and perform preliminary curing;

[0065] Immerse the cured polishing layer 3 into the abrasive adhesive again. After immersing for 3 minutes, take it out, squeeze out the liquid, and dry and cure it;

[0066] S4 combination: Coat the lower surface of the polishing layer 3 with hot melt adhesive, and hot press the polishing layer 3 onto the surface of the waterproof layer 2. Cut the upper surface of the polishing layer 3 to ensure that the surface of the flocking layer is flush. Example 2:

[0067] A waterproof single-sided felt and velvet polishing pad for glass polishing, comprising a base layer 1, a waterproof layer 2 and a polishing layer 3. The side of the base layer 1 connected to the arc-shaped top 21 is a curved surface structure protruding in the center.

[0068] The base layer 1 is made of the following raw materials in parts by weight: 40 parts of nylon fiber, 20 parts of spandex fiber, and 25 parts of polyester fiber.

[0069] The waterproof layer 2 is provided with an arc-shaped top 21 and a lower collar 22. The lower end of the arc-shaped top 21 is integrally formed with the upper end of the lower collar 22. Both the arc-shaped top 21 and the lower collar 22 are composed of two layers of polypropylene waterproof membranes sandwiching a polyethylene high molecular breathable membrane, and the surface of the arc-shaped top 21 is a curved surface structure.

[0070] The polishing layer 3 includes a non-woven fabric base layer and a flocking layer. Abrasive adhesives are attached to the surfaces and gaps of the non-woven fabric base layer and the flocking layer. The abrasive adhesive is made of the following raw materials in parts by weight:

[0071] 30 parts of water-based epoxy resin adhesive, 10 parts of polyurethane rubber, 20 parts of cerium oxide, 12 parts of alumina, 2 parts of titanium dioxide, 1 part of zinc oxide, and 2 parts of calcium carbonate.

[0072] The non-woven fabric base layer uses polypropylene pellets and polyurethane particles as raw materials, and the material ratio of polypropylene and polyurethane materials is 2:1.

[0073] The flocking layer is nylon fluff, the thickness of the flocking layer is 1 mm, and the flocking layer is arranged on the side of the non-woven fabric base layer away from the waterproof layer 2.

[0074] The polishing pad is prepared by the same method as in Example 1, and the difference from Example 1 is that the amount of water-based epoxy resin adhesive contained in the abrasive adhesive in Example 2 is increased. Example 3:

[0075] A waterproof single-sided felt and velvet polishing pad for glass polishing, comprising a base layer 1, a waterproof layer 2 and a polishing layer 3. The side of the base layer 1 connected to the arc-shaped top 21 is a curved surface structure protruding in the center.

[0076] The base layer 1 is made of the following raw materials in parts by weight: 40 parts of nylon fiber, 20 parts of spandex fiber, and 25 parts of polyester fiber.

[0077] The waterproof layer 2 is provided with an arc-shaped top 21 and a lower collar 22. Both the arc-shaped top 21 and the lower collar 22 are composed of two layers of polypropylene waterproof membranes sandwiching a polyethylene high molecular breathable membrane, and the surface of the arc-shaped top 21 is a curved surface structure.

[0078] The polishing layer 3 includes a non-woven fabric base layer and a flocked layer. Abrasive adhesives are attached to the surfaces and gaps of the non-woven fabric base layer and the flocked layer. The abrasive adhesive is made from the following raw materials in parts by weight:

[0079] 40 parts of water-based epoxy resin glue, 10 parts of polyurethane rubber, 20 parts of cerium oxide, 12 parts of alumina, 2 parts of titanium dioxide, 1 part of zinc oxide, and 2 parts of calcium carbonate.

[0080] The non-woven fabric base layer uses polypropylene pellets and polyurethane particles as raw materials, and the material ratio of polypropylene to polyurethane is 2:1.

[0081] The flocked layer is nylon fluff, the thickness of the flocked layer is 1 mm, and the flocked layer is arranged on the side of the non-woven fabric base layer away from the waterproof layer 2.

[0082] The polishing pad is prepared by the same method as in Example 1. The difference from Example 2 is that the amount of water-based epoxy resin glue contained in the abrasive adhesive in Example 2 is increased. Example 4:

[0083] A waterproof single-sided felted and flocked polishing pad for glass polishing, including a base layer 1, a waterproof layer 2, and a polishing layer 3. The side of the base layer 1 connected to the arc-shaped top 21 is a curved surface structure with a central protrusion.

[0084] The base layer 1 is made from the following raw materials in parts by weight: 40 parts of nylon fiber, 20 parts of spandex fiber, and 25 parts of polyester fiber.

[0085] The waterproof layer 2 is provided with an arc-shaped top 21 and a lower collar 22, and the surface of the arc-shaped top 21 is a curved surface structure.

[0086] The polishing layer 3 includes a non-woven fabric base layer and a flocked layer. Abrasive adhesives are attached to the surfaces and gaps of the non-woven fabric base layer and the flocked layer. The abrasive adhesive is made from the following raw materials in parts by weight:

[0087] 30 parts of water-based epoxy resin glue, 15 parts of polyurethane rubber, 20 parts of cerium oxide, 12 parts of alumina, 2 parts of titanium dioxide, 1 part of zinc oxide, and 2 parts of calcium carbonate.

[0088] The non-woven fabric base layer uses polypropylene pellets and polyurethane particles as raw materials, and the material ratio of polypropylene to polyurethane is 2:1.

[0089] The flocked layer is nylon fluff, the thickness of the flocked layer is 1 mm, and the flocked layer is arranged on the side of the non-woven fabric base layer away from the waterproof layer 2.

[0090] The polishing pad is prepared by the same method as in Example 1. The difference from Example 2 is that the amount of polyurethane rubber contained in the abrasive adhesive in Example 2 is increased.

[0091] Comparative Example 1:

[0092] A waterproof single-sided felt polishing pad for glass polishing, comprising a base layer 1, a waterproof layer 2 and a polishing layer 3. One side of the base layer 1 connected to the arc surface top 21 is a curved surface structure with a central protrusion.

[0093] The polishing layer 3 includes a non-woven fabric base layer, and abrasive adhesives are attached to the gaps of the non-woven fabric base layer. The abrasive adhesive is made of the following raw materials in parts by weight:

[0094] 30 parts of water-based epoxy resin glue, 15 parts of polyurethane rubber, 20 parts of cerium oxide, 12 parts of alumina, 2 parts of titanium dioxide, 1 part of zinc oxide and 2 parts of calcium carbonate.

[0095] The non-woven fabric base layer is made of polypropylene pellets and polyurethane particles, and the material ratio of polypropylene and polyurethane materials is 2:1.

[0096] Compared with Example 4, the flocking layer structure was cancelled in this comparative example. The polishing pad was prepared by the method of Example 1 in the preparation process, and at the same time, the flocking step of the flocking layer was cancelled accordingly.

[0097] The polishing pads prepared in the above examples and comparative examples were subjected to performance tests, and the results are as follows:

[0098] Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Hardness (D) 65 67 69 65 49 Wear (g) 0.18 0.17 0.13 0.11 0.32 <![CDATA[Water permeability of the polishing layer (mL / cm 2 h)]]> 2676 2684 2675 2689 2693

[0099] As can be seen from the above table, the polishing pads prepared in Examples 1 to 4 all have good hardness and low wear amount. The addition of water-based epoxy resin glue in Examples 2 and 3 increases the hardness of the prepared polishing pads. The addition of polyurethane rubber in Example 4 results in less wear of the polishing pad prepared in Example 4. In Comparative Example 1, due to the lack of the flocking layer structure, the absorption amount of the abrasive adhesive is small, and the hardness of the prepared polishing pad is low and the abrasion amount is large. However, the water permeability gap of the polishing layer 31 in Comparative Example 1 and Examples 1 to 4 is not large, indicating that the flocking layer in Examples 1 to 4 does not cause a decrease in water permeability.

[0100] In summary, a waterproof single-sided felt polishing pad for glass polishing and its production process proposed by the present invention are provided with a waterproof layer 2. The polyethylene polymer breathable film corresponding to the arc-shaped top 21 has a central thickness that gradually decreases towards the edge thickness, such that the side of the arc-shaped top 21 connected to the non-woven fabric base layer is a curved surface structure, improving the hydrophobicity of the surface of the arc-shaped top 21. The base layer 1 and the arc-shaped top 21 are connected through a curved surface, which can increase the connection area and enhance the firmness of the connection between the base layer 1 and the arc-shaped top 21. The lower peripheral ring 22 provides waterproofing for the side wall of the base layer 1, extending the service life of the base layer 1. The polishing layer 3 includes a non-woven fabric base layer and a flocking layer. The flocking layer is arranged on the side of the non-woven fabric base layer away from the waterproof layer 2. The gaps in the flocking layer are relatively large. By using the impregnation method, the non-woven fabric base layer and the flocking layer can adhere to more abrasive adhesives, increasing the hardness of the polishing pad and reducing the wear of the polishing pad.

[0101] 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0102] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A production process of a waterproof single-sided felt polishing pad for glass polishing. The polishing pad includes a base layer (1), a waterproof layer (2), and a polishing layer (3). The waterproof layer (2) is provided with a curved surface top (21) and a lower surrounding ring (22). The lower end of the curved surface top (21) is integrally formed with the upper end of the lower surrounding ring (22). The base layer (1) is arranged inside the lower surrounding ring (22). The upper surface of the curved surface top (21) is fixedly connected to the polishing layer (3). The polishing layer (3) includes a non-woven fabric base layer and a flocking layer. Abrasive adhesives are attached to the surfaces and gaps of the non-woven fabric base layer and the flocking layer. The abrasive adhesive is made from the following raw materials by weight: 20 - 40 parts of water-based epoxy resin glue, 10 - 20 parts of polyurethane rubber, 15 - 20 parts of cerium oxide, 10 - 15 parts of alumina, 2 - 3 parts of titanium dioxide, 1 - 2 parts of zinc oxide, and 1 - 2 parts of calcium carbonate. It is characterized in that, It includes the following steps: S1 Preparation of the base layer (1): Stack the woven nylon fibers, spandex fibers, and polyester fiber cloth, and then bond them together to form the base layer (1); S2 Waterproof layer (2): Heat, melt, and extrude the polypropylene waterproof membrane material and the polyethylene high molecular breathable membrane into melts respectively, and spray a layer of polypropylene waterproof membrane material on the upper surface and side walls of the base layer (1); After the polypropylene waterproof membrane is dried, spray a layer of polyethylene high molecular breathable membrane on the surface of the polypropylene waterproof membrane, and gradually increase the thickness of the polyethylene high molecular breathable membrane at the center position of the polyethylene high molecular breathable membrane on the upper surface of the base layer (1), so that the height gradually decreases from the center to the edge position; Spray a layer of polypropylene waterproof membrane material on the surface of the dried polyethylene high molecular breathable membrane, and thickly coat the polypropylene waterproof membrane at the corresponding position on the side wall of the lower collar (22), so that the outer surface of the outer layer of polypropylene waterproof membrane forms a smooth cylindrical shape; S3 Polishing layer (3): Flock nylon fluff with a thickness of 0.5 - 2 mm on one side of the non-woven fabric base layer, and then wash and dry it to form a flocked layer; Mix and stir water-based epoxy resin glue, polyurethane rubber, cerium oxide, alumina, titanium dioxide, zinc oxide, and calcium carbonate to make a liquid abrasive adhesive; Immerse the non-woven fabric base layer with the flocked layer bonded to it into the abrasive adhesive. During the immersion process, extrude it, extrude it 4 - 5 times repeatedly, then take it out, extrude until no liquid comes out, and preliminarily cure it; Immerse the cured polishing layer (3) into the abrasive adhesive again. After immersing for 2 - 5 minutes, take it out, squeeze out the liquid, and dry and cure it; S4 Assembly: Coat the lower surface of the polishing layer (3) with hot melt adhesive, and hot press the polishing layer (3) onto the surface of the waterproof layer (2), and cut and polish the upper surface of the polishing layer (3) to ensure that the surface of the flocked layer is flat.

2. The production process of the waterproof single-sided felt polishing pad for glass polishing according to claim 1, characterized in that: The non-woven fabric base layer is made of polypropylene pellets and polyurethane particles as raw materials. They are respectively heated, melted, and extruded into melts by a screw extruder. The two melts are extruded from the spinneret holes of the die head towards each other, and are blown by hot air currents on both sides of the spinneret holes. The melts are stretched into warp ultra-fine fibers and form the non-woven fabric base layer through self-bonding.

3. The production process of the waterproof single-sided felt polishing pad for glass polishing according to claim 2, characterized in that: The flocked layer is nylon fluff, the thickness of the flocked layer is 0.5 - 2 mm, and the flocked layer is arranged on the side of the non-woven fabric base layer away from the waterproof layer (2).

4. The production process of the waterproof single-sided felt polishing pad for glass polishing according to claim 3, characterized in that: Both the arc-shaped top (21) and the lower collar (22) are composed of two layers of polypropylene waterproof membrane sandwiching a polyethylene high molecular breathable membrane, and the surface of the arc-shaped top (21) is a curved surface structure.

5. The production process of the waterproof single-sided felt polishing pad for glass polishing according to claim 4, characterized in that: There are grooves provided on the inner wall of the lower collar (22).

6. The production process of the waterproof single-sided felt polishing pad for glass polishing according to claim 5, characterized in that: The lower surface of the base layer (1) is flush with the lower end of the lower collar (22), and a raised ring (11) is provided on the side wall of the base layer (1), and the raised ring (11) is engaged with the groove.

7. The production process of the waterproof single-sided felt polishing pad for glass polishing according to claim 6, characterized in that: One side of the base layer (1) connected to the arc-shaped top (21) is a curved surface structure with a central protrusion.

8. The production process of the waterproof single-sided felt polishing pad for glass polishing according to claim 7, characterized in that: The base layer (1) is made of the following raw materials in parts by weight: 30 - 40 parts of nylon fibers, 15 - 25 parts of spandex fibers, and 20 - 30 parts of polyester fibers.

9. The production process of the waterproof single-sided felt polishing pad for glass polishing according to claim 8, characterized in that: The specific steps of S1 for preparing the base layer (1) include the following: Take nylon fiber, spandex fiber and polyester fiber materials with a diameter of 0.01 - 0.015 mm, and weave them according to a warp density and a weft density of 40 threads / cm to make nylon fiber cloth, spandex fiber cloth and polyester fiber cloth; Stack them in the order of nylon fiber cloth, spandex fiber cloth and polyester fiber cloth, apply and adhere glue between each layer of fiber cloth, and hot press them into an integral base; Perform curved surface cutting on the upper end of the integral base so that the center position of the upper end of the integral base is high and the edge position is low. At the same time, cut out a raised ring (11) structure on the side wall of the integral base to make a base layer (1), and wash and dry the base layer (1) to remove waste chips and particles.

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