Glass mildew-proof isolation powder and preparation method thereof

Abstract

The invention discloses glass mildew-proof isolation powder and a preparation method, and relates to the technical field of glass manufacturing, and the glass mildew-proof isolation powder comprises the following components in parts by weight: 65-96 parts of polymer non-spherical particles and 4-35 parts of a mildew-proof additive. The invention can provide the glass mildew-proof isolation powder with better comprehensive performance.

Description

Technical Field

[0001] The present application relates to the technical field of glass manufacturing, and in particular to a glass mildew-proof isolation powder and a preparation method thereof. Background Art

[0002] Glass needs to be stacked after being sliced ​​and processed during production. Before stacking, a layer of glass anti-mildew isolation powder needs to be sprayed on the surface of each layer of glass. On the one hand, it can prevent scratches caused by friction between the two pieces of glass, and on the other hand, it can also prevent the glass from mildew.

[0003] In the related art, glass anti-mildew isolation powder is generally made of PMMA (polymethyl methacrylate) spherical particles. Although PMMA spheres have good compressive resistance and can effectively play a good isolation role, PMMA spherical particles are easily penetrated by water molecules in a high humidity environment, resulting in a decrease in the anti-mildew effect. Therefore, it is necessary to seek a glass anti-mildew isolation powder with better anti-mildew isolation effect. Summary of the Invention

[0004] The main purpose of the present application is to provide a glass anti-mildew isolation powder and a preparation method thereof, aiming to solve the technical problem of poor anti-mildew effect of glass anti-mildew isolation powder in the related art.

[0005] To achieve the above objectives, the present application proposes a glass mildew-proof isolation powder, which comprises the following components in parts by weight: 65 to 96 parts of polymer non-spherical particles and 4 to 35 parts of mildew-proof additives.

[0006] In one embodiment, the glass anti-mildew isolation powder includes the following components in parts by weight: 65-80 parts of polymer non-spherical particles and 20-35 parts of anti-mildew additives.

[0007] In one embodiment, the glass mildew-proof isolation powder comprises the following components in parts by weight: 80 parts of polymer non-spherical particles and 20 parts of mildew-proof additives; or

[0008] 65 parts of polymer non-spherical particles and 35 parts of anti-mildew additives.

[0009] In one embodiment, the compressive strength of the polymer non-spherical particles is 16 MPA to 24 MPA.

[0010] In one embodiment, the compressive strength of the polymer non-spherical particles is 19 MPA.

[0011] In one embodiment, the weight ratio of the polymer non-spherical particles to the mildew-proof additive is 65:35, and the compressive strength of the polymer non-spherical particles is 24 MPA; or

[0012] The weight ratio of the polymer non-spherical particles to the anti-mildew additive is 80:20, and the compressive strength of the polymer non-spherical particles is 19 MPA.

[0013] In one embodiment, the polymer non-spherical particles include at least one of polyethylene particles, polyvinyl chloride particles, and polypropylene particles; and / or

[0014] Anti-mold additives include organic acids and chelating agents.

[0015] In one embodiment, the organic acid includes anhydrous citric acid, and the chelating agent includes tetrasodium hydroxyethylidene diphosphonate (HEDP-4Na). The weight ratio of HEDP-4Na to anhydrous citric acid is (40-60): (40-60).

[0016] In one embodiment, the particle size of the polymer non-spherical particles is 0.1 mm to 0.3 mm; and / or

[0017] The particle size of the anti-mildew additive is not greater than 0.1 mm.

[0018] In addition, to achieve the above-mentioned purpose, the present application also proposes a method for preparing the above-mentioned glass mildew-proof isolation powder, which comprises:

[0019] The polymer non-spherical particles and the anti-mildew additive are evenly mixed to obtain the glass anti-mildew isolation powder.

[0020] One or more technical solutions proposed in this application have at least the following technical effects:

[0021] The glass mildew-proof isolation powder provided in this application is made of 65 to 96 parts of polymer non-spherical particles and 4 to 35 parts of mildew-proof additives. The polymer non-spherical particles are generally certain types of polymer powder or resin powder, which can provide good compressive isolation. The polymer non-spherical particles usually have an irregular non-spherical structure. This irregular structure can increase the adhesion area of ​​the mildew-proof additive. As a result, the mildew-proof additive in the mildew-proof isolation powder of this application can be fully covered between the polymer non-spherical particles to form a denser mildew-proof protective layer. Under this dense mildew-proof protective layer, it is more difficult for external moisture to penetrate the glass. At the same time, chemical reactions on the glass surface are also more difficult to occur or occur at a slower rate due to the presence of the dense protective layer, thereby effectively improving the mildew-proof performance. Compared with high-performance materials such as PMMA, the materials of polymer non-spherical particles are simpler and easier to purchase. At the same time, the raw material cost of polymer non-spherical particles is relatively lower. Therefore, it can effectively reduce the production cost of glass mildew-proof isolation powder while meeting the performance requirements of glass mildew-proof isolation powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 A schematic flow chart of the preparation method of the glass mildew-proof isolation powder provided in this application.

[0025] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0027] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0028] The main solution of the embodiment of the present application is: providing a glass anti-mildew isolation powder, which may include the following components in parts by weight: 65 to 96 parts of polymer non-spherical particles and 4 to 35 parts of anti-mildew additives.

[0029] After glass is cut and manufactured, it needs to be stacked. Generally, a layer of insulation is added between the two sheets to prevent scratches caused by friction between the layers. Stacking also generates pressure, which requires the insulation to have sufficient compressive strength. Furthermore, the glass is typically stored for one to four months after being shipped to the customer, so it also requires the addition of anti-mold ingredients to prevent mold. Therefore, before stacking, a layer of anti-mold powder is applied to each layer of glass to provide insulation and prevent mold.

[0030] In the relevant technology, glass anti-mildew isolation powder can generally be made of PMMA (polymethyl methacrylate) spherical particles. Although PMMA spheres have good compressive resistance and can effectively play a good isolation role, PMMA spherical particles are easily penetrated by water molecules in a high humidity environment, resulting in a decrease in the anti-mildew effect. At the same time, PMMA is a high-performance spherical material, and its raw material cost is relatively high, which will increase the overall production cost of glass manufacturing companies. Therefore, it is necessary to seek a glass anti-mildew isolation powder with better comprehensive performance.

[0031] The present application provides a solution, which can be made into glass mildew-proof isolation powder by using 65 to 96 parts of polymer non-spherical particles and 4 to 35 parts of mildew-proof additives; wherein, the polymer non-spherical particles are generally certain types of polymer powder or resin powder, which can play a good isolation role; the polymer non-spherical particles are usually irregular non-spherical structures, and this irregular structure can increase the adhesion area of ​​the mildew-proof additive, so that the mildew-proof additive in the prepared mildew-proof isolation powder can be fully covered between the polymer non-spherical particles to form a denser mildew-proof protective layer, effectively preventing chemical reactions on the glass surface and preventing external moisture from penetrating, thereby improving its mildew-proof performance. On the other hand, compared with high-performance materials such as PMMA, the material of polymer non-spherical particles is simpler and easier to purchase, and the raw material cost of polymer non-spherical particles is relatively lower. Therefore, while meeting the performance requirements of glass mildew-proof isolation powder, it can effectively reduce the production cost of glass mildew-proof isolation powder and obtain glass mildew-proof isolation powder with better comprehensive performance.

[0032] The present application will be described and introduced in detail below through a number of embodiments.

[0033] The present application provides a first embodiment of a glass mildew-proof insulation powder. In this embodiment, the glass mildew-proof insulation powder may include components such as polymer non-spherical particles and mildew-proof additives, wherein the ratio of the components is 65-96 parts polymer non-spherical particles and 4-35 parts mildew-proof additives.

[0034] Specifically, polymer particles are generally tiny solid particles composed of long-chain polymer molecules, typically produced through polymerization reactions or other processes (such as melt extrusion). Compared to high-performance plastics like PMMA, polymer particles are easier to process and have a relatively mature production process, resulting in lower manufacturing costs. Polymer non-spherical particles are non-spherical and have other shapes (such as flakes, needles, and fibers). The production process for polymer non-spherical particles is relatively simple, and unlike spherical particles, they do not require the more sophisticated manufacturing process. Therefore, using polymer non-spherical particles can effectively reduce the production cost of glass mildew-proof insulation powder.

[0035] The particle size of the polymer non-spherical particles can be selected within the range of 0.1mm to 0.3mm; the polymer non-spherical particles within the above particle size range will not be too small, so they can effectively play a role in isolating between glass and glass. At the same time, the polymer non-spherical particles within the above particle size range can have a larger dispersion amount, thereby effectively reducing their usage per unit area of ​​glass, thereby reducing the cost of glass production companies on glass mildew-proof isolation powder; the polymer non-spherical particles can form a uniform isolation layer on the glass surface, which can effectively prevent direct contact between glasses, thereby reducing scratches and friction. At the same time, the shape and particle size distribution of the polymer non-spherical particles make them more adherent to the glass surface, further enhancing the isolation effect. In some feasible embodiments, the compressive strength of the polymer non-spherical particles can be 16MPA to 24MPA; because under normal circumstances, the thickness of photovoltaic glass is generally thin, about 2mm; the maximum stacking number of layers of 2mm rolled glass is 220 layers, and the compressive strength of the bottom layer is 0.1MPA, so the compressive strength of the polymer non-spherical particles is 16MPA to 24MPA. It can meet the compressive performance requirements in actual production. Preferably, the compressive strength of the polymer non-spherical particles can be 19MPA.

[0036] In addition, the polymer non-spherical particles may include at least one of PE polyethylene particles, PVC polyvinyl chloride particles, and PP polypropylene particles. That is, the polymer non-spherical particles may be any one of the above-mentioned PE particles, PVC particles, or PP particles, or a free combination of the above-mentioned particles. In actual production, the availability of polymer non-spherical particles is also relatively high. They can be obtained by directly purchasing polymer granular materials (such as PE, PVC, PP, etc. that meet the requirements) on the market, and then the polymer granular materials are screened through a 0.3mm sieve and a 0.1mm sieve in turn, thereby removing large particles larger than 0.3mm and fine particles smaller than 0.1mm. Through the above operation, polymer non-spherical particles with a particle size range of 0.1mm to 0.3mm can be obtained.

[0037] Anti-mildew additives are used to prevent glass from mildewing. Glass is generally alkaline (the pH of finely ground glass can reach around 11). So-called glass mildew does not refer to the growth of mold on the glass. Rather, it refers to the phenomenon in which alkaline ions (such as sodium and potassium ions) in the glass, under the influence of water for a long time, migrate to the glass surface and aggregate into clumps, forming visible white spots. Anti-mildew additives prevent these ions from aggregating, making it difficult for these white spots to form on the glass surface, thereby ensuring the quality of the glass. Based on the foregoing, it can be seen that polymer non-spherical particles typically have an irregular non-spherical structure. This irregular structure can increase the adhesion area of ​​the anti-mildew additive. Therefore, using a ratio of 65-96 parts polymer non-spherical particles to 4-35 parts anti-mildew additive to prepare glass anti-mildew isolation powder allows the anti-mildew additive to adhere to the polymer non-spherical particles to a greater extent, forming a more dense anti-mildew protective layer. This dense protective layer structure is less likely to penetrate external moisture, and chemical reactions on the glass surface are less likely to occur or occur more slowly, thereby significantly improving the anti-mildew performance of the glass anti-mildew isolation powder. In addition, since a smaller particle size of the anti-mildew additive is more conducive to improving its anti-mildew performance, in this embodiment, the particle size of the anti-mildew additive is generally no larger than 0.1 mm to achieve a better anti-mildew effect.

[0038] Specifically, the mildew-proof additive may include materials such as a chelating agent and an organic acid. The organic acid is generally a weak organic acid, preferably citric acid, which can provide a self-cleaning effect on glass surfaces. In one feasible embodiment, the organic acid may include anhydrous citric acid, and the chelating agent may include tetrasodium hydroxyethylidene diphosphonate (HEDP-4Na). In this embodiment, the mildew-proof additive is a combination of anhydrous citric acid and HEDP-4Na. The weight ratio of HEDP-4Na to anhydrous citric acid may be (40-60):(40-60).

[0039] In practical applications, HEDP-4Na, a chelating agent, and anhydrous citric acid can be mixed in the aforementioned ratio and ground into a powder with a particle size of less than 0.1 mm. This mixture can produce an anti-mildew additive for preparing glass insulation and anti-mildew powder. This combination allows HEDP-4Na to lock multiple alkali metal ions through chelation, while the anhydrous citric acid also disrupts the aggregated state of the alkali metal ions. This allows the organic acid to react with the sodium and potassium ions on the glass surface and disperse them on the glass surface, making it difficult for the sodium and potassium ions to form salt aggregates on the glass surface. Furthermore, the protective film formed by the chelation of HEDP-4Na prevents further water penetration, achieving an anti-mildew effect on the glass through the dual effects of dispersion and protection.

[0040] It is worth mentioning that organic acids such as citric acid are acidic and can react with mineral deposits on the surface of the glass (such as scale, calcium salts and magnesium salts, etc.) to dissolve these scale, calcified substances and other deposits. Therefore, during the glass cleaning stage, organic acids can help glass fragments or other debris mentioned above to quickly separate from the glass, play a role in cleaning, and speed up the cleaning process.

[0041] In addition, the glass anti-mildew isolation powder of the present application is also better for subsequent water treatment; it is understandable that in the relevant technology, the anti-mildew isolation powder is usually commercial anti-mildew powder prepared from adipic acid, and a large amount of adipic acid is required to achieve an anti-mildew effect. The pH value of the commercial anti-mildew powder prepared from adipic acid is generally 3.4 (high organic acid content and strong acidity). Therefore, during the edge grinding and cleaning process of the subsequent deep processing steps, the commercial isolation powder enters the circulating water, which will greatly reduce the pH value of the water body. In order to maintain the pH value of the water body within the range of 6-8, alkaline substances such as sodium hydroxide need to be added to balance the pH value of the water body; therefore, when using the commercial anti-mildew powder in the relevant technology, due to the strong acidity of the anti-mildew powder, more alkaline substances need to be added to the water body, which will cause the complexity of the water body, resulting in an increase in the total number of ions in the water body, affecting the water quality.

[0042] In the combination of HEDP-4Na and anhydrous citric acid in this application, HEDP-4Na can anchor calcium and magnesium ions in glass, forming a hydrophobic layer on the glass surface, preventing moisture from accumulating on the glass surface. This ensures that the mildew-proof additive using this combination can achieve the desired mildew-proof effect at a relatively low dosage. In actual water treatment operations, the extent to which the pH of the water decreases is primarily affected by factors such as the degree of dissociation of the acidic substance and the dosage used. For example, HEDP-4Na is a salt substance that dissolves in water and is weakly acidic, thus having a relatively small effect on the pH of the water. Furthermore, anhydrous citric acid is a ternary organic weak acid. The mildew-proof powder produced from this combination of HEDP-4Na and anhydrous citric acid has a pH of approximately 6.8. Therefore, the mildew-proof glass powder produced from this combination has a minimal impact on the pH of the water when it enters the circulating water. Furthermore, less alkaline substances need to be added during water treatment, or even no alkaline substances need to be added, thus ensuring a certain degree of water quality. In addition, the mildew-proof powder only uses a combination of HEDP-4Na and anhydrous citric acid, and there is no other soluble organic matter. Therefore, there will be no water corruption problem caused by the accumulation of organic matter. When treating the grinding circulating water, the treatment process can be reduced to only treat the debris-type sediments, thereby improving the treatment efficiency of the grinding circulating water.

[0043] It should be noted that, in the current production of photovoltaic glass, the transportation distance of the glass is generally about 500m (that is, from the cold end of the glass production line to the deep processing loading point), and the corresponding storage time is generally 3 to 20 days. The storage distance and time are relatively short, so the glass anti-mildew isolation powder can focus more on the isolation effect of the glass. Therefore, the weight ratio of polymer non-spherical particles and anti-mildew additives can be (65 to 96): (4 to 35), that is, the anti-mildew additives are slightly less than the polymer non-spherical particles, which ensures the short-term anti-mildew storage needs of the glass before leaving the factory while reducing the production cost of the glass anti-mildew isolation powder.

[0044] It can be understood that the glass anti-mildew isolation powder provided in this embodiment is made of 65 to 96 parts by weight of polymer non-spherical particles and 4 to 35 parts of anti-mildew additives; among them, the polymer non-spherical particles are generally certain types of polymer powder or resin powder, which can play a better isolation role, and compared with high-performance plastics such as PMMA, the material of polymer non-spherical particles is simpler and easier to purchase, and its raw material cost is lower. Therefore, while meeting the performance requirements of the glass anti-mildew isolation powder, it can effectively reduce the production cost of the glass anti-mildew isolation powder and improve its economic efficiency.

[0045] Based on the same application concept, this application also provides a second embodiment of glass mildew-proof isolation powder.

[0046] In this embodiment, the glass anti-mildew isolation powder may include the following components in parts by weight: 65 to 80 parts of polymer non-spherical particles and 20 to 35 parts of anti-mildew additives.

[0047] Detailed descriptions of the polymer non-spherical particles and mildew-proof additive can be found in the first embodiment of the glass mildew-proof insulation powder and are omitted here. In one embodiment, the glass mildew-proof insulation powder may include the following components by weight: 80 parts polymer non-spherical particles and 20 parts mildew-proof additive; or 65 parts polymer non-spherical particles and 35 parts mildew-proof additive.

[0048] In this embodiment, 65 to 80 parts by weight of polymer non-spherical particles and 20 to 35 parts of anti-mildew additives are used to prepare glass anti-mildew isolation powder. Through appropriate proportions, the isolation and anti-mildew effects of the glass are improved. At the same time, compared with glass anti-mildew isolation powder made of high-performance plastic such as PMMA, the cost is reduced and better economic efficiency can be achieved.

[0049] The present application also provides a third embodiment of a glass mildew-proof isolation powder.

[0050] In the glass mildew-proof isolation powder provided in this embodiment, the weight ratio of the polymer non-spherical particles and the mildew-proof additive is 65:35, and the compressive strength of the polymer non-spherical particles is 24 MPA; or the weight ratio of the polymer non-spherical particles and the mildew-proof additive is 80:20, and the compressive strength of the polymer non-spherical particles is 19 MPA.

[0051] Specifically, in this embodiment, a glass mildew-proof isolation powder can be made by using polymer non-spherical particles with a compressive strength of 24 MPA and a mildew-proof additive in a weight ratio of 65:35. The 24 MPA polymer non-spherical particles can form a relatively stable protective film on the glass surface, which is not easily damaged by external pressure, ensuring the stability of the isolation film during transportation and storage. Alternatively, a glass mildew-proof isolation powder can be made by using polymer non-spherical particles with a compressive strength of 19 MPA and a mildew-proof additive in a weight ratio of 80:20. The 80:20 ratio means that the polymer non-spherical particles occupy a larger proportion, and the isolation film formed is stronger and thicker, which can provide a more stable protective effect. Therefore, the compressive strength of the polymer non-spherical particles can be lower than that of the glass mildew-proof isolation powder with a 65:35 ratio, and 19 MPA is selected.

[0052] In this embodiment, by selecting a suitable ratio of polymer non-spherical particles with a certain compressive strength and anti-mildew additives, the isolation and anti-mildew effects of the glass are improved. Compared with the glass anti-mildew isolation powder made of high-performance plastic such as PMMA, the preparation cost is reduced and it has better economy.

[0053] In addition, to achieve the above-mentioned purpose, the present application also proposes a method for preparing the above-mentioned glass mildew-proof isolation powder, which comprises:

[0054] Step S100 : Evenly mix the polymer non-spherical particles and the mildew-proof additive to obtain the glass mildew-proof isolation powder.

[0055] Specifically, high-speed stirring equipment (such as a double-helix conical mixer, etc.) can be used to mix and stir the polymer non-spherical particles and anti-mildew additives in appropriate proportions. The purpose of mixing is to make the polymer non-spherical particles and the anti-mildew additives fully and evenly distributed, thereby obtaining glass anti-mildew isolation powder with relatively consistent performance. It is understandable that if the mixing is uneven, it may lead to unstable anti-mildew isolation effect or poor local effect.

[0056] In a feasible embodiment, polymer granules such as PE, PVC, PP, etc. that meet the requirements can be purchased directly from the market; the polymer granules are screened through a 0.3mm sieve to remove polymer granules larger than 0.3mm to obtain screened granules; and then the screened granules are further subdivided through a 0.1mm sieve to remove fine particles below 0.1mm, thereby obtaining polymer non-spherical particles with a particle size between 0.1mm and 0.3mm, which are used to prepare glass anti-mildew isolation powder. A mildew-proof additive is then obtained by combining HEDP-4Na and anhydrous citric acid. HEDP-4Na and anhydrous citric acid can be mixed in a suitable ratio (see the Examples section of the aforementioned mildew-proof isolation powder for glass) to obtain a mixture, which is then ground into a powder having a particle size of less than 0.1 mm using a ball mill or a grinder. The ground HEDP-4Na and anhydrous citric acid composition is the mildew-proof additive that can be used to prepare mildew-proof isolation powder for glass. Polymer non-spherical particles having a particle size of 0.1 mm to 0.3 mm and the mildew-proof additive having a particle size of less than 0.1 mm are uniformly mixed in a suitable ratio (see the Examples section of the aforementioned mildew-proof isolation powder for glass) to obtain mildew-proof isolation powder for glass.

[0057] It can be understood that the preparation method of the glass anti-mildew isolation powder of this embodiment adopts a mixture of polymer non-spherical particles and anti-mildew additives to form the glass anti-mildew isolation powder; wherein, the polymer non-spherical particles are generally certain types of polymer powder or resin powder, which can play a better isolation role, and the polymer non-spherical particles usually have an irregular non-spherical structure. This irregular structure can increase the adhesion area of ​​the anti-mildew additive, so that the anti-mildew additive in the prepared anti-mildew isolation powder can be fully covered between the polymer non-spherical particles to form a denser anti-mildew protective layer, effectively preventing chemical reactions on the glass surface and preventing external moisture from penetrating, thereby improving its anti-mildew performance; and compared with high-performance plastics such as PMMA, the material of the polymer non-spherical particles is simpler and easier to purchase, and its raw material cost is lower, thereby meeting the performance requirements of the glass anti-mildew isolation powder while effectively reducing the production cost of the glass anti-mildew isolation powder.

[0058] In order to better understand the technical solution of the present application, the above-mentioned glass mildew-proof isolation powder is described below through several specific examples (Example 1 to Example 3).

[0059] Example 1: The specific formula of glass mildew-proof isolation powder is shown in Table 1.

[0060] Table 1:

[0061] composition Polymer non-spherical particles Anti-mildew additives Ratio 65 35

[0062] As shown in Table 1 above, in Example 1, the weight ratio of the polymer non-spherical particles to the anti-mildew additive is 65:35; wherein the compressive strength of the polymer non-spherical particles is approximately 24 MPA; the anti-mildew additive includes a combination of HEDP-4Na and anhydrous citric acid, and the weight ratio of HEDP-4Na to anhydrous citric acid is selected to be 40:60.

[0063] Since the transportation distance of glass in photovoltaic glass production is generally about 500m (i.e. from the cold end to the deep processing loading place), and the storage time is generally 3 to 20 days, the storage distance and time are relatively short, so the glass anti-mildew isolation powder can focus more on the isolation effect of the glass. Therefore, compared with the previous usage requirements, the current usage of glass anti-mildew isolation powder can be increased from 250mg / m 2 Reduce to 200 mg / m 2 .

[0064] The compressive properties of the powder balls in the glass mildew-proof isolation powder obtained according to the ratio of Example 1 are shown in Table 2.

[0065] Table 2

[0066]

[0067] In Table 2 above, the pressure of 220 layers of glass is the weight of 11,000 layers of glass when stacked at an angle of 10 degrees, that is, 11,000 × sin (10°); the total effective area of ​​the anti-mildew powder is determined based on the number of anti-mildew powders per unit area, the effective area of ​​the balls, and the proportion of polymer non-spherical particles (that is, 1769.73 × 0.07 × 0.65 = 80.52); the required compressive strength of the anti-mildew powder balls is the ratio of the pressure of 220 layers of glass to the total effective area of ​​the anti-mildew powder (that is, 1910.13 / 80.52 = 23.72). As shown in Table 2, the glass anti-mildew isolation powder can meet the mechanical property requirements.

[0068] The formulation of the glass mildew-proof isolation powder of Example 2 is shown in Table 3.

[0069] Table 3:

[0070] composition Polymer non-spherical particles Anti-mildew additives Ratio 96 4

[0071] In Example 2 above, the weight ratio of the polymer non-spherical particles to the mildew-proof additive is 96:4, wherein the compressive strength of the polymer non-spherical particles is approximately 16 MPA; the mildew-proof additive includes HEDP-4Na and anhydrous citric acid, and the weight ratio of HEDP-4Na and anhydrous citric acid is 50:50; the amount of glass mildew-proof isolation powder used is 200 mg / m 2 .

[0072] The compressive properties of the powder balls in the glass mildew-proof isolation powder obtained according to the ratio of Example 2 are shown in Table 4.

[0073] Table 4

[0074]

[0075]

[0076] The total effective area of ​​the anti-mildew powder and the required compressive strength of the anti-mildew powder balls in Table 4 above can be calculated by referring to the relevant calculation method in Table 2. As shown in Table 4, the glass anti-mildew isolation powder can meet the mechanical performance requirements.

[0077] The formulation of the glass mildew-proof isolation powder of Example 3 is shown in Table 5.

[0078] Table 5:

[0079] composition Polymer non-spherical particles Anti-mildew additives Ratio 80 20

[0080] In Example 3 above, the weight ratio of the polymer non-spherical particles to the mildew-proof additive is 80:20, wherein the compressive strength of the polymer non-spherical particles is approximately 19 MPA; the mildew-proof additive includes HEDP-4Na and anhydrous citric acid, and the weight ratio of HEDP-4Na to anhydrous citric acid is 60:55; the amount of the glass mildew-proof isolation powder used is 200 mg / m 2 .

[0081] The compressive properties of the powder balls in the glass mildew-proof isolation powder obtained according to the ratio of Example 3 are shown in Table 6.

[0082] Table 6

[0083]

[0084]

[0085] As shown in Table 6, the glass mildew-proof isolation powder can meet the mechanical property requirements.

[0086] In order to more intuitively demonstrate the anti-mildew performance of the glass anti-mildew isolation powder of this application, the following experimental comparisons were conducted:

[0087] Multiple groups of glass samples of the same specifications (200mm×200mm) were selected, and each group of glass samples included 5 pieces of glass with no powder spraying on the surface and no cracking defects; the 5 pieces of glass in each group of glass were numbered from 1 to 5 in sequence, and all glass samples were wiped clean and left to dry naturally. The treated groups of glass samples were divided into experimental and control groups; wherein, the experimental groups were treated with the glass mildew-proof isolation powders in the aforementioned Examples 1, 2, and 3 respectively; the control groups included Comparative Example 1 (mildew-proof powder with model FG-05 produced by Langfang Development Zone Topology Technology Development Co., Ltd.), Comparative Example 2 (mildew-proof powder with model HNB-35SG produced by Zhongshan Polyco New Materials Co., Ltd.), and Comparative Example 3 (no mildew-proof powder added); Comparative Examples 1 and 2 were both glass mildew-proof isolation powders made of PMMA.

[0088] For each set of glass samples, the anti-mildew powder was evenly sprayed on the air side of the glass sample (Comparative Example 3 did not spray the anti-mildew powder). The glass samples were stacked in the order of the glass number, with the top glass not sprayed with the powder. The stacked glass samples were fixed with yellow cardboard and tape, and the type of anti-mildew powder was marked on the yellow cardboard. The treated anti-mildew powder was placed under the same environmental conditions (for example, a constant temperature and constant chamber temperature of 65±2°C and 90±2% humidity can be used) and the mold growth of each set of glass was observed. The final experimental results are shown in Table 7.

[0089] Table 7

[0090] Anti-mildew powder group model Day 3 Day 14 Day 18 Comparative Example 1 FG-05 normal normal normal Comparative Example 2 HNB-35SG normal normal Moldy Comparative Example 3 none Moldy / / Example 1 (65：35) normal normal normal Example 2 (96：4) normal normal Moldy Example 3 (80：20) normal normal Moldy

[0091] As shown in Table 7, Comparative Example 3, which did not add glass anti-mildew powder, had obvious mildew on the 3rd day. Examples 1, 2, and 3 provided in this application have certain anti-mildew effects compared to Comparative Example 3, which did not add anti-mildew powder. Among them, the anti-mildew powder with a ratio of (65:35) has a better anti-mildew effect, and no obvious mildew appeared on the 18th day. Referring to Comparative Example 2 and Example 1 of this application, it can be seen that the glass of Comparative Example 2 had mildewed on the 18th day, while the glass of Example 1 was still in normal condition and had better anti-mildew performance. It can be seen that by optimizing the ratio of polymer non-spherical particles and anti-mildew additives, this application can achieve a synergistic effect between the two to effectively improve the anti-mildew performance.

[0092] In addition, the glass mildew-proof isolation powder in this application is made of polymer non-spherical particles with low purchase cost, so the total cost required for its preparation is relatively lower than the total cost of PMMA glass mildew-proof isolation powder in related technologies. It can save a large amount of production capital investment for glass kilns and has better overall economic efficiency.

[0093] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A glass mildew-proof isolation powder, characterized in that: The glass mildew-proof isolation powder comprises the following components in parts by weight: 65 to 96 parts of polymer non-spherical particles and 4 to 35 parts of mildew-proof additives.

2. The glass mildew-proof isolation powder according to claim 1, characterized in that: The glass mildew-proof isolation powder comprises the following components in parts by weight: 65 to 80 parts of the polymer non-spherical particles and 20 to 35 parts of the mildew-proof additive.

3. The glass mildew-proof isolation powder according to claim 1, characterized in that: The glass mildew-proof isolation powder comprises the following components in parts by weight: 80 parts of the polymer non-spherical particles and 20 parts of the mildew-proof additive; or 65 parts of the polymer non-spherical particles and 35 parts of the anti-mildew additive.

4. The glass mildew-proof isolation powder according to claim 1, characterized in that: The compressive strength of the polymer non-spherical particles is 16 MPA to 24 MPA.

5. The glass mildew-proof isolation powder according to claim 4, characterized in that: The compressive strength of the polymer non-spherical particles is 19 MPA.

6. The glass mildew proof isolation powder according to any one of claims 1 to 3, characterized in that: The weight ratio of the polymer non-spherical particles to the mildew-proof additive is 65:35, and the compressive strength of the polymer non-spherical particles is 24 MPA; or The weight ratio of the polymer non-spherical particles to the anti-mildew additive is 80:20, and the compressive strength of the polymer non-spherical particles is 19 MPA.

7. The glass mildew proof isolation powder according to any one of claims 1 to 3, characterized in that: The polymer non-spherical particles include at least one of polyethylene particles, polyvinyl chloride particles and polypropylene particles; and / or The anti-mildew additive includes an organic acid and a chelating agent.

8. The glass mildew-proof isolation powder according to claim 7, characterized in that: The organic acid includes anhydrous citric acid, and the chelating agent includes tetrasodium hydroxyethylidene diphosphonate HEDP-4Na; the weight ratio of the HEDP-4Na to the anhydrous citric acid is (40-60): (40-60).

9. The glass mildew-proof isolation powder according to claim 7, characterized in that: The particle size of the non-spherical polymer particles is 0.1 mm to 0.3 mm; and / or The particle size of the anti-mildew additive is no more than 0.1 mm.

10. A method for preparing the glass mildew-proof isolation powder according to any one of claims 1 to 9, characterized in that: The preparation method comprises: The polymer non-spherical particles and the mildew-proof additive are mixed evenly to obtain the glass mildew-proof isolation powder.

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