A glass tube production protection method, production system and application thereof

Abstract

The present application relates to the field of glass manufacturing, in particular to a glass tube production protection method, a production system and application thereof, to solve the problem that the spraying of Tween 80 solution after the glass tube is drawn out from the muffle furnace will affect the environment, transmittance and friction performance in the prior art. The method comprises the following steps: dissolving polyvinyl alcohol and Tween 80 in ethanol, uniformly coating the prepared polyvinyl alcohol and Tween 80 solution on the surface of the substrate, and drying the substrate; coating sodium silicate solution on the substrate; immersing the substrate coated with sodium silicate solution into the organic silicon polymer, and forming a finished product protection film after drying; and winding the finished product protection film on the glass tube. The protection method provided by the present application can not only improve the wear resistance, but also ensure the transmittance and will not affect the environment.

Description

Technical Field

[0001] The present invention relates to the field of glass manufacturing, and in particular to a glass tube production protection method, a production system and applications thereof. Background Art

[0002] During the drawing process of neutral borosilicate glass tubes, the surface needs to be sprayed before rough cutting. The spraying liquid is made of Tween 80 and water. The glass tube at this position is about 200 degrees Celsius. After the spraying liquid is sprayed, the water is dried to form a protective layer on the surface of the glass tube to reduce scratches on the surface of the glass tube during transportation.

[0003] Tween 80 is a surfactant with certain chemical reactivity, which can have adverse effects on human health and the environment. Its chemical properties can cause health risks such as allergic reactions, skin irritation, and respiratory problems. Existing spraying methods, due to their in-line nature, also suffer from uneven application, which can lead to abrasion in unsprayed areas.

[0004] In addition, the existing method of forming a protective film by leaving Tween 80 after water evaporation will create many pores. In order to increase the distribution area of ​​Tween 80, it can only be achieved by increasing the concentration of Tween 80. However, if the concentration of Tween 80 is too high, it will not only affect the production environment, but also affect the transmittance of the glass. Summary of the Invention

[0005] The present invention discloses a glass tube production protection method, a production system and applications thereof, in order to solve the problem mentioned in the background art that spraying Tween 80 solution on the glass tube after it is drawn out of a muffle furnace will affect the environment, transmittance and friction performance.

[0006] The solution of the present invention is:

[0007] A glass tube production protection method comprises the following steps:

[0008] Dissolving polyvinyl alcohol and Tween 80 in ethanol, evenly coating the prepared polyvinyl alcohol and Tween 80 solution on the surface of the substrate, and drying the substrate;

[0009] coating a sodium silicate solution on a substrate;

[0010] The substrate coated with the sodium silicate solution is immersed in the organic silicon polymer and dried to form a finished protective film;

[0011] Wrap the finished protective film online around the glass tube.

[0012] Furthermore,

[0013] The mass ratio of the polyvinyl alcohol to Tween 80 is 2:1.

[0014] Furthermore,

[0015] Preparation method of sodium silicate solution: dissolve sodium silicate in deionized water and stir to completely dissolve it to form a sodium silicate solution.

[0016] Furthermore,

[0017] Silicone polymers include polymethylsiloxane and / or polysilane.

[0018] Furthermore,

[0019] The mass ratio of polymethylsiloxane to polysilane is 1:1.

[0020] Furthermore,

[0021] The substrate coated with the sodium silicate solution was immersed in the organosilicon polymer for 10-20 seconds.

[0022] Furthermore,

[0023] The substrate coated with the sodium silicate solution was lifted up and then heat-treated at 120° C. for 30 minutes.

[0024] Furthermore,

[0025] After the glass tube is drawn out of the muffle furnace, when the temperature drops to 180-220 degrees Celsius, the finished protective film is wrapped around the outer surface of the glass tube.

[0026] A glass tube production system is characterized by adopting the above-mentioned glass tube production protection method.

[0027] An application of the above-mentioned glass tube production protection method.

[0028] The effect analysis is as follows:

[0029] This solution first forms a base layer using vinyl alcohol and Tween 80. A sodium silicate solution is then applied to the base layer. The substrate coated with the sodium silicate solution is then immersed in a silicone polymer solution and removed to create the finished protective film. The finished protective film is then wrapped around a glass tube. At this point, due to the temperature of the glass tube being between 180 and 220 degrees Celsius, the vinyl alcohol in the base layer evaporates upon heating, leaving the Tween 80 evenly distributed on the outer surface of the glass tube.

[0030] After the evaporation of vinyl alcohol, large pores form on the glass surface, which means that Tween 80 is not fully covered, resulting in a higher risk of scratching the glass tube. This solution first uses vinyl alcohol and Tween 80 to form a base layer (the mass ratio of polyvinyl alcohol to Tween 80 is 2:1). A sodium silicate solution is then applied to the base layer. The glass surface treated with silica sol has a higher content of silanol groups and more reactive sites, resulting in good compatibility and improved grafting efficiency of the polymer on the silica sol coating. After the silica sol coating, the nano-defects on the glass are filled and flattened, reducing the diffuse reflection of the glass surface. The fully hydrophobic surface prepared by this method can adhere well to the glass surface and has good light transmittance, while also filling the defects on the substrate surface and improving light transmittance.

[0031] The silica gel-coated substrate is then immersed in an organosilicon polymer, which forms a wear-resistant polysiloxane hydrophobic surface on the surface of the sodium silicate solution. Chemical bonding between the organosilicon polymer and the sodium silicate solution creates a fully hydrophobic surface with excellent stability. The optimal synergistic effect is achieved when the organosilicon polymer comprises polymethylsiloxane and polysilane in a 1:1 mass ratio. Furthermore, the introduction of methyl groups improves the wetting and surface tension regulation properties of the siloxane, making the film more hydrophilic. The silicon-oxygen bonds and methyl groups in the molecular structure of methylsiloxane give this compound a high transmittance, which matches well with the transmittance of air and other materials. DETAILED DESCRIPTION

[0032] Testing and Characterization

[0033] Transmittance testing was conducted in accordance with GB / T 2410-2008, and abrasion resistance testing was conducted in accordance with AS TMF 735. Abrasion resistance was determined by measuring the increase in haze after 200 strokes of quartz sand. Wettability was measured by microscopic imaging of the water contact angle.

[0034] Example 1

[0035] Dissolve polyvinyl alcohol and Tween 80 in ethanol, and evenly coat the prepared polyvinyl alcohol and Tween 80 solution on the surface of the substrate. The mass ratio of polyvinyl alcohol to Tween 80 is 2:1. Dry the substrate. Dissolve sodium silicate in deionized water, stir to completely dissolve it to form a sodium silicate solution, and coat the sodium silicate solution on the substrate.

[0036] The substrate coated with sodium silicate solution was immersed in polymethylsiloxane for 15 seconds, then heat-treated in an oven at 120°C for 30 minutes. After drying, the finished protective film was formed. The finished protective film was then wrapped around a glass tube set at 200°C. The glass tube, cooled to room temperature, was then tested for abrasion resistance, wettability, and transmittance.

[0037] Example 2

[0038] Dissolve polyvinyl alcohol and Tween 80 in ethanol, and evenly coat the prepared polyvinyl alcohol and Tween 80 solution on the surface of the substrate. The mass ratio of polyvinyl alcohol to Tween 80 is 2:1. Dry the substrate. Dissolve sodium silicate in deionized water, stir to completely dissolve it to form a sodium silicate solution, and coat the sodium silicate solution on the substrate.

[0039] The substrate coated with sodium silicate solution was immersed in polysilane for 15 seconds, then heat-treated in an oven at 120°C for 30 minutes. After drying, the finished protective film was formed. The finished protective film was then wrapped around a glass tube set at 200°C. The glass tube, cooled to room temperature, was then tested for wear resistance, wettability, and transmittance.

[0040] Example 3

[0041] Dissolve polyvinyl alcohol and Tween 80 in ethanol, and evenly coat the prepared polyvinyl alcohol and Tween 80 solution on the surface of the substrate. The mass ratio of polyvinyl alcohol to Tween 80 is 2:1. Dry the substrate. Dissolve sodium silicate in deionized water, stir to completely dissolve it to form a sodium silicate solution, and coat the sodium silicate solution on the substrate.

[0042] A substrate coated with a sodium silicate solution was immersed in a mixture of polymethylsiloxane and polysilane at a mass ratio of 1:1 for 15 seconds. The mixture was then heat-treated in an oven at 120°C for 30 minutes and dried to form a finished protective film. The finished film was then wrapped around a glass tube set at 200°C. The glass tube, cooled to room temperature, was then tested for wear resistance, wettability, and transmittance.

[0043] Comparative Example 1

[0044] Tween 80 and water were mixed in a ratio of 1:10 to form a mixture, which was sprayed on the outside of a glass tube at 200 degrees Celsius. The glass tube was then cooled to room temperature and tested for wear resistance, wettability and transmittance.

[0045] Results and Discussion

[0046] Wear resistance% Wettability Transmittance% Example 1 4.26 103° 96.8 Example 2 4.19 101° 96.5 Example 3 3.27 105° 97.2 Comparative Example 1 5.39 30° 96.1

[0047] This approach first forms a base layer using vinyl alcohol and Tween 80 (in a 2:1 mass ratio). A sodium silicate solution is then applied to this base layer. The silica gel-coated substrate is then immersed in an organosilicon polymer. The organosilicon polymer forms a wear-resistant polysiloxane hydrophobic surface on the surface of the sodium silicate solution. Chemical bonds form between the organosilicon polymer and the sodium silicate solution, resulting in a fully hydrophobic surface with excellent stability. The optimal synergistic effect is achieved when the organosilicon polymer comprises polymethylsiloxane and polysilane in a 1:1 mass ratio. Furthermore, the introduction of methyl groups improves the wetting and surface tension-regulating properties of the siloxane, making the film more hydrophilic. The silicon-oxygen bonds and methyl groups in the molecular structure of methylsiloxane give this compound a high transmittance, providing good transmittance compatibility with air and other materials.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A glass tube production protection method, characterized by: The process includes the following steps: Dissolving polyvinyl alcohol and Tween 80 in ethanol, evenly coating the prepared polyvinyl alcohol and Tween 80 solution on the surface of the substrate, and drying the substrate; coating a sodium silicate solution on a substrate; The substrate coated with the sodium silicate solution is immersed in the organic silicon polymer and dried to form a finished protective film; Wrap the finished protective film online around the glass tube.

2. The glass tube production protection method according to claim 1, characterized in that: The mass ratio of the polyvinyl alcohol to Tween 80 is 2:

1.

3. The glass tube production protection method according to claim 1, characterized in that: Preparation method of sodium silicate solution: dissolve sodium silicate in deionized water and stir to completely dissolve it to form a sodium silicate solution.

4. The glass tube production protection method according to claim 1, characterized in that ， Silicone polymers include polymethylsiloxane and / or polysilane.

5. The glass tube production protection method according to claim 4, characterized in that: The mass ratio of polymethylsiloxane to polysilane is 1:

1.

6. The glass tube production protection method according to claim 1, characterized in that: The substrate coated with the sodium silicate solution was immersed in the organosilicon polymer for 10-20 seconds.

7. The glass tube production protection method according to claim 1, characterized in that: The substrate coated with the sodium silicate solution was lifted up and then heat-treated at 120° C. for 30 minutes.

8. The glass tube production protection method according to claim 1, characterized in that: After the glass tube is drawn out of the muffle furnace, when the temperature drops to 180-220 degrees Celsius, the finished protective film is wrapped around the outer surface of the glass tube.

9. A glass tube production system, characterized in that: The glass tube production protection method according to any one of claims 1 to 8 is adopted.

10. Use of the glass tube production protection method according to any one of claims 1 to 8.