Flexible glass and manufacturing process thereof
阅读说明：本技术 一种柔性玻璃及其制作工艺 (Flexible glass and manufacturing process thereof ) 是由 陆永刚 于 2020-06-17 设计创作，主要内容包括：本发明公开了一种柔性玻璃及其制作工艺,涉及柔性玻璃技术领域,包括玻璃层、基材层,所述玻璃层设置有两层,两层所述玻璃层分别设置在所述基材层上表面或下表面。其中玻璃层通过二次拉伸展薄,且通过化学减薄处理,使玻璃层厚度达到0.025～0.05mm；并通过扩散焊接技术将玻璃层焊接固定设置在基材层上,实现柔性玻璃的制作。本发明提供了玻璃厚度薄、柔韧性强、透光性及耐热性好的一种柔性玻璃及其制作工艺。(The invention discloses flexible glass and a manufacturing process thereof, and relates to the technical field of flexible glass. Wherein the glass layer is stretched and thinned for the second time, and the thickness of the glass layer reaches 0.025-0.05 mm through chemical thinning treatment; and fixedly welding the glass layer on the substrate layer by a diffusion welding technology to realize the manufacture of the flexible glass. The invention provides flexible glass with thin glass thickness, strong flexibility, good light transmission and heat resistance and a manufacturing process thereof.)
1. The utility model provides a flexible glass, its characterized in that includes glass layer (2), substrate layer (1), glass layer (2) are provided with two-layerly, two-layerly glass layer (2) set up respectively substrate layer (1) upper surface or lower surface, glass layer (2) deviate from substrate layer (1) one side is provided with protective layer (3).
2. The flexible glass according to claim 1, wherein the material of the substrate layer (1) is PET, PA or PI.
3. The flexible glass according to claim 1, wherein the substrate layer (1) has a thickness of 0.05-0.4 mm.
4. The flexible glass according to claim 1, wherein a welding-aid layer is arranged between the glass layer (2) and the substrate layer (1), wherein the welding-aid layer is a silica gel coating.
5. A flexible glass according to claim 1, characterised in that the protective layer (3) is PET.
6. A process according to claim 1, comprising the steps of:
s1, heating and melting the glass powder into molten glass, and discharging the molten glass into a forming pool;
s2, enabling the molten glass to flow out of the bottom of the forming pool and performing secondary drawing and stretching by a glass roller to be thin;
s3, chemically thinning the glass in the S2 by hydrofluoric acid;
s4, performing pretreatment on the upper surface and the lower surface of the base material layer (1), wherein the pretreatment comprises the step of coating a silica gel coating on the upper surface and the lower surface of the base layer to form a welding assistant layer;
and S5, laying the thinned glass on the substrate layer, and welding the glass on the substrate layer (1) by using a diffusion welding technology.
7. The process of claim 6, wherein the glass forming thickness is controlled to be 0.2-0.33 mm in step S1.
8. The process of claim 6, wherein in step S2, the glass is drawn and thinned twice to a thickness of 0.08-1.2 mm.
9. The process of claim 6, wherein in step S3, the surface of the glass is chemically thinned by hydrofluoric acid to a thickness of 0.025-0.05 mm.
10. The manufacturing process of the flexible glass according to claim 6, wherein in step S5, the diffusion welding is performed in a vacuum environment, the temperature is controlled to be 180-280 ℃, and the pressure is controlled to be more than 200 MPa.
Technical Field
The invention relates to the technical field of flexible glass, in particular to flexible glass and a manufacturing process thereof.
Background
Glass is a brittle material and has relatively low mechanical strength and impact strength, so that the flexibility of the glass is closely related to the thickness of the glass and defects of the glass. Glass is traditionally considered to be rigid in nature and so alternative materials have been considered to be used in place of glass. For example, flexible films made of polymers have been considered and studied for use as a substitute for glass in flexible display devices. Flexible films do provide the necessary flexibility but do not meet the durability, scratch resistance, chemical resistance and optical properties necessary for such applications. With the gradual thinning of the glass thickness, the bending deformation amount of the glass becomes larger gradually, and the bending strength is increased, however, the elastic modulus and the hardness of the glass are not changed, the crack propagation speed is reduced in the bending process, and the preparation of high-strength flexible glass is facilitated. Thus, the manufacture of flexible glass presupposes that the glass is sufficiently thin and has a high surface quality.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide a flexible glass and a manufacturing process thereof, wherein the produced flexible glass has a thin thickness, a strong flexibility, and good light transmittance and heat resistance.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a flexible glass, includes glass layer, substrate layer, the glass layer is provided with two-layerly, two-layerly the glass layer sets up respectively substrate layer upper surface or lower surface, the glass layer deviates from substrate layer one side is provided with the protective layer.
The invention is further configured to: the material of the base material layer is PET, PA or PI.
The invention is further configured to: the thickness of the base material layer is 0.05-0.4 mm.
The invention is further configured to: the glass layer with be provided with between the substrate layer and help the solder layer, wherein help the solder layer and be the silica gel coating.
The invention is further configured to: the protective layer is PET.
The flexible glass manufacturing process is characterized by comprising the following steps:
s1, heating and melting the glass powder into molten glass, and discharging the molten glass into a forming pool;
s2, enabling the molten glass to flow out of the bottom of the forming pool and performing secondary drawing and stretching by a glass roller to be thin;
s3, chemically thinning the glass in the S2 by hydrofluoric acid;
s4, performing pretreatment on the upper surface and the lower surface of the base material layer, wherein the pretreatment comprises the step of coating a silica gel coating on the upper surface and the lower surface of the base layer to form a welding assistant layer;
and S5, laying the thinned glass on the substrate layer, and welding the glass on the substrate layer by using a diffusion welding technology.
The invention is further configured to: in step S1, the glass forming thickness is controlled to be 0.2-0.33 mm.
The invention is further configured to: in step S2, the glass is drawn and thinned twice so that the thickness of the glass is 0.08 to 1.2 mm.
The invention is further configured to: in step S3, the surface of the glass is chemically thinned by hydrofluoric acid to make the thickness of the glass 0.025-0.05 mm.
The invention is further configured to: in step S5, diffusion welding is performed in a vacuum environment, the temperature is controlled to be 180-280 ℃, and the pressure is more than 200 Mpa.
In conclusion, the invention has the following beneficial effects:
1. through setting up the glass layer at the upper surface and the lower surface of substrate layer, this kind of structural style makes flexible glass's whole pliability reinforcing, and through the protective layer that sets up, flexible glass is when not using at flexible glass simultaneously, protects flexible glass, avoids flexible glass surface fish tail, contaminated.
2. The welding-assisting layer is arranged on the base material layer, so that the glass layer is firmly fixed on the surface of the base material layer, and the stability of the whole structure of the flexible glass is ensured.
3. The glass is stretched and thinned for the second time, and the hydrofluoric acid is used for further reducing the glass, so that the thickness of the glass layer is 0.08-1.2 mm, the glass layer is thinned in multiple modes, the whole thickness of the flexible glass is reduced, and the light transmittance of the flexible glass is improved.
4. In the vacuum environment, temperature control is at 180 ~ 280 degrees centigrade, and pressure maintains more than 200Mpa, and the mode through the diffusion welding is with glass layer welded fastening on the substrate layer, helps guaranteeing flexible glass overall structure's stability.
Drawings
FIG. 1 is a schematic structural view of a flexible glazing of the present invention;
FIG. 2 is a schematic view of a flexible glass processing flow of the present invention.
Reference numerals: 1. a substrate layer; 2. a glass layer; 3. and a protective layer.
Detailed Description
The invention provides flexible glass and a manufacturing process thereof, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail below by referring to the attached drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order, it being understood that the data so used may be interchanged under appropriate circumstances. Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such system, article, or apparatus.
Referring to fig. 1, the flexible glass comprises a
And silica gel coatings are coated on the upper surface and the lower surface of the base material layer 1 to form a welding-assistant layer. Namely, the solder mask layer is disposed between the
Referring to fig. 2, a glass making process includes the steps of:
and S1, heating and melting the glass powder into molten glass, and discharging the molten glass into a forming pool.
The temperature of the extruder is adjusted by using a film blowing forming technology and is controlled at 600 ℃ and 1000 ℃. The size of the outlet of the extruder die is controlled to be 0.2-0.33 mm. Then adding the heated and melted glass powder into an extruder, extruding the liquid glass by the thrust of the extruder, extruding the liquid glass from a die opening, and controlling a cooling air ring to ensure that the glass liquid has certain rigidity after being discharged from the die. In addition, the compressed air output by the air compressor is controlled, the storage tank is closed, the compressed air enters the central hole of the spiral core rod of the die head through the outlet valve of the storage tank, a pressure regulating valve is arranged in front of the die head of the agent pressing machine, the air quantity and the air pressure are regulated according to the thickness requirement of glass, and the compressed air enters the tubular center of an extrudate through the central hole of the core rod. Then, pressure is generated from the inside, and the glass liquid in the tubular shape is subjected to inflation extrusion to form a film in the shape of a bubble tube.
And S2, the molten glass flows out from the bottom of the forming pool and is drawn and stretched for a second time by a glass roller.
Subsequently, the tubular film is pulled by a pulling auxiliary machine. The auxiliary traction machine consists of main components such as a traction frame, a herringbone plate, a traction roller, a coiling mechanism, a traction motor and the like. And finally, driving the two pairs of traction rollers through the speed reduction part, driving the coiling mechanism at the same time, fixing the herringbone plate on a fixing frame below the traction rollers, controlling the size of the film by adjusting the size of the included angle, drawing the blown film by the traction rollers, preventing gas in the film in the shape of a bubble tube from overflowing, and coiling the blown film by a coiling machine to obtain the glass with the thickness of 0.08-1.2 mm.
And S3, performing chemical thinning treatment on the glass in the S2 by hydrofluoric acid.
And cleaning the stretched and thinned glass, and soaking the glass in deionized water for 8-12 minutes to remove foreign matters on the surface of the glass. And then, putting the cleaned glass into a hydrofluoric acid solution for etching, keeping the temperature at 30-35 ℃, etching for 50-60 minutes, taking the etched glass out of the hydrofluoric acid solution, and cleaning and drying the glass. The thickness of the glass is 0.025-0.05 mm.
And S4, preprocessing the upper surface and the lower surface of the base material layer 1, wherein the preprocessing process is to coat a silica gel coating on the upper surface and the lower surface of the base layer to form a welding assistant layer.
And S5, laying the thinned glass on the substrate layer, and welding the glass on the substrate layer 1 by using a diffusion welding technology.
And (3) tiling the thinned glass, paving a substrate layer 1 on the glass, and then paving a layer of glass on the upper surface of the substrate layer 1. The material to be welded is placed in a diffusion welding furnace and the furnace door is closed. And vacuumizing the furnace to maintain the vacuum degree in the furnace below-0.097, heating the furnace to 180-280 ℃, and maintaining the pressure in the furnace to be more than 200 Mpa. And (4) keeping the temperature for 10-15 minutes by considering the thickness of the base material and the structure of the product. And then slowly cooling the temperature in the furnace, and taking out the processed flexible glass.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.