Glass tube production protection method, production system and application thereof

Abstract

The invention relates to the field of glass manufacturing, in particular to a glass tube production protection method, a production system and application thereof. The problems that in the prior art, after a glass tube is drawn out of a muffle furnace, a Tween-80 solution is sprayed, and the environment, transmittance and friction performance are affected are solved. Comprising the following steps: dissolving polyvinyl alcohol and Tween 80 in ethanol, uniformly coating the surface of a substrate with a prepared vinyl alcohol and Tween 80 solution, and drying the substrate; coating a sodium silicate solution on the substrate; immersing the substrate coated with the sodium silicate solution into the organic silicon polymer, and drying to form a finished product protective film; and winding the finished product protective film outside the glass tube on line. According to the protection method provided by the invention, the wear resistance can be improved, the transmittance can be ensured, and the environment is not influenced.

Description

Technical Field

[0001] The 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 activity, which has adverse effects on human health and the environment. Its chemical properties may cause health risks such as allergic reactions, skin irritation, and respiratory problems. The existing spraying method, because it belongs to the online spraying method, also has the problem of uneven spraying, and uneven spraying leads to the risk of wear in the unsprayed areas.

[0004] In addition, the existing method of using water evaporation to leave Tween 80 to form a protective film will cause many pores after the water evaporates. 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 invention discloses a glass tube production protection method, a production system and application thereof, so as to solve the problem mentioned in the background technology 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] The finished protective film is wound 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 silicone polymer for 10-20 seconds.

[0022] Furthermore,

[0023] After the substrate coated with the sodium silicate solution was lifted up, a heat treatment was performed 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] In this scheme, vinyl alcohol and Tween 80 are first used to form a base layer, and then a sodium silicate solution is coated on the base layer, and then the substrate coated with the sodium silicate solution is immersed in an organic silicon polymer, and the finished protective film is obtained after being taken out. The finished protective film is wrapped around the outside of the glass tube. At this time, since the temperature of the glass tube is 180-220 degrees Celsius, the vinyl alcohol of the base layer evaporates after being heated, leaving Tween 80 evenly distributed on the outer surface of the glass tube.

[0030] After the ethylene alcohol evaporates, larger pores will be formed on the glass surface, which means that Tween 80 is not fully covered, so the risk of scratching the glass tube is high. This scheme first uses ethylene alcohol and Tween 80 to form a base layer (the mass ratio of polyvinyl alcohol and Tween 80 is 2:1), and then coats the base layer with sodium silicate solution. The glass surface treated with silica sol has a higher content of silanol and more reaction sites, resulting in good compatibility and better grafting efficiency of the polymer on the silica sol coating. After the silica sol is coated, the nano-defects on the glass are filled and become flat, reducing the diffuse reflection of the glass surface. The fully phobic surface prepared by this method can adhere well to the glass surface and has good light transmittance, while filling the defects on the substrate surface and improving the light transmittance.

[0031] Then the substrate coated with silica gel is immersed in the organosilicon polymer, which will form a wear-resistant polysiloxane hydrophobic surface on the surface of the sodium silicate solution. The organosilicon polymer and the sodium silicate solution are chemically bonded, and the prepared fully hydrophobic surface has good stability. In addition, the best synergistic effect is obtained when the composition of the organosilicon polymer is a mass ratio of polymethylsiloxane to polysilane of 1:1. In addition, the introduction of methyl groups can improve the wetting properties and surface tension adjustment properties of siloxane, making the film more hydrophilic. The silicon-oxygen bonds and methyl groups in the molecular structure of methylsiloxane make this compound have a higher transmittance, and the transmittance matching between air and other materials is better. DETAILED DESCRIPTION

[0032] Testing and Characterization

[0033] The transmittance test was conducted in accordance with GB / T 2410-2008, and the abrasion resistance test was conducted in accordance with AS TMF 735. The abrasion resistance was measured by the increase in haze after 200 strokes of quartz sand. The wettability was measured by microscopic images to test 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, and 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 wrapped around the glass tube online, and the temperature of the glass tube was set to 200°C. The glass tube cooled to room temperature was tested for wear resistance, wettability and transmittance.

[0037] Embodiment 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, and 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 wound online on the outside of the glass tube, and the temperature of the glass tube was set to 200°C. The glass tube cooled to room temperature was tested for wear resistance, wettability and transmittance.

[0040] Embodiment 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] The substrate coated with sodium silicate solution was immersed in a mixture of polymethylsiloxane and polysilane, with a mass ratio of polymethylsiloxane to polysilane of 1:1, and the immersion time was 15 seconds. It was heat treated in an oven at 120°C for 30 minutes, and dried to form a finished protective film. The finished protective film was wound online on the outside of a glass tube, and the temperature of the glass tube was set to 200 degrees Celsius. The glass tube cooled to room temperature was 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, which was then cooled to room temperature, was then 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 scheme first uses vinyl alcohol and Tween 80 to form a base layer (the mass ratio of polyvinyl alcohol and Tween 80 is 2:1), and then a sodium silicate solution is coated on the base layer. Then the substrate coated with silica gel is immersed in the organosilicon polymer. The organosilicon polymer will form a wear-resistant polysiloxane hydrophobic surface on the surface of the sodium silicate solution. The organosilicon polymer and the sodium silicate solution are chemically bonded, and the prepared fully hydrophobic surface has good stability. In addition, when the composition of the organosilicon polymer is a mass ratio of polymethylsiloxane and polysilane of 1:1, the best synergistic effect is obtained. In addition, the introduction of methyl groups can improve the wetting properties and surface tension adjustment properties of siloxane, making the film more hydrophilic. The silicon-oxygen bond and methyl group in the molecular structure of methylsiloxane make this compound have a higher transmittance, and the transmittance matching between air and other materials is better.

[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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A glass tube production protection method, characterized in that: The steps include: 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; The finished protective film is wound 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 silicone polymer for 10-20 seconds.

7. The glass tube production protection method according to claim 1, characterized in that: After the substrate coated with the sodium silicate solution was lifted up, a heat treatment was performed 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 as described in any one of claims 1 to 8 is adopted.

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