CN114634306A - Preparation method of four-fiber tubule - Google Patents
Preparation method of four-fiber tubule Download PDFInfo
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- CN114634306A CN114634306A CN202210268071.4A CN202210268071A CN114634306A CN 114634306 A CN114634306 A CN 114634306A CN 202210268071 A CN202210268071 A CN 202210268071A CN 114634306 A CN114634306 A CN 114634306A
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- glass
- inner hole
- glass fiber
- steel wire
- mother rod
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- 210000005239 tubule Anatomy 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims description 6
- 239000000835 fiber Substances 0.000 title description 4
- 239000011521 glass Substances 0.000 claims abstract description 69
- 230000007797 corrosion Effects 0.000 claims abstract description 28
- 238000005260 corrosion Methods 0.000 claims abstract description 28
- 239000002904 solvent Substances 0.000 claims abstract description 27
- 238000000227 grinding Methods 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 14
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims abstract description 13
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims abstract description 13
- 235000013871 bee wax Nutrition 0.000 claims abstract description 13
- 238000005520 cutting process Methods 0.000 claims abstract description 13
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012166 beeswax Substances 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 239000003365 glass fiber Substances 0.000 claims description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 13
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 239000012459 cleaning agent Substances 0.000 claims description 11
- 238000004381 surface treatment Methods 0.000 claims description 9
- 238000005498 polishing Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 6
- 229910017604 nitric acid Inorganic materials 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 239000013307 optical fiber Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000004891 communication Methods 0.000 abstract description 3
- 238000005491 wire drawing Methods 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 210000004081 cilia Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/0256—Drawing hollow fibres
Abstract
The invention belongs to the technical field of optical fiber communication, in particular to a method for preparing a four-cilium tubule, which comprises the steps of enabling a steel wire to penetrate through an inner hole of a glass mother rod and clamping two ends of the glass mother rod by a clamp; coating grinding micro powder on the surface of the steel wire, expanding the inner hole to a proper size by rotating or linearly moving the steel wire in the inner hole, and grinding the outer diameter of the glass mother rod to meet preset parameters by processing through a cylindrical grinding machine; and drawing the glass master rod into proper glass filaments on a drawing tower. According to the invention, the inner hole of the glass mother rod is processed by using the steel wire and the grinding micro powder, so that the inner hole is expanded and formed, the operation and control are easier, the corrosion forming of the inner hole is realized through the physicochemical reaction between the corrosion solvent and the glass filaments, the internal stress of the product can be reduced, the problems of cracks and the like on the product can be prevented, the glass filaments after wire drawing forming are mutually adhered through the rosin and the beeswax, the subsequent integral cutting of the glass filaments is facilitated, and the production efficiency of the product is improved.
Description
Technical Field
The invention relates to the technical field of optical fiber communication, in particular to a method for preparing four cilium tubules.
Background
In order to reduce the loss of signals in connection or realize specific functions in an optical fiber communication device, a single or a plurality of optical fibers need to be accurately positioned by adopting an optical fiber capillary tube, the optical fiber capillary tube has the advantages of high positioning precision (the tolerance of the outer diameter dimension is +/-0.005 mm, the tolerance of the inner diameter dimension is +/-0.002 mm), good process performance, high cost performance, transparency, visibility and the like, and is used for optical high-speed analog devices, optical fiber collimators, tail fiber assembly, limited television networks, the adjustment and collimation of optical active and optical passive devices, DWFM and interface parts of photoelectric equipment which need to be connected in a conversion way.
1. The conventional optical fiber capillary is usually produced by adopting a traditional blowing forming process, so that the inner wall of a product has strong stress, the product is easy to crack, and the adverse effect on optical signal transmission is generated.
2. In addition, the production efficiency of the existing equipment for producing the optical fiber capillary is low, and the large-batch processing cannot be realized.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a preparation method of four ciliated tubules, which solves the problem of strong stress on the inner wall of a product by a corrosion forming method.
(II) technical scheme
The invention specifically adopts the following technical scheme for realizing the purpose:
a preparation method of four ciliated tubules comprises the following steps:
s1: a steel wire is taken to penetrate through an inner hole of the glass mother rod, and two ends of the glass mother rod are clamped by a clamp;
s2: coating grinding micro powder on the surface of the steel wire, and enabling the steel wire to rotate or linearly move in the inner hole to expand the inner hole to a proper size;
s3: grinding the outer diameter of the glass mother rod to meet preset parameters through the machining of a cylindrical grinding machine;
s4: drawing the glass mother rod into proper glass filaments on a drawing tower;
s5: adhering a plurality of glass filaments by rosin and beeswax to form a cylindrical structure, and cutting the cylindrical structure into required lengths by an inner circle cutting machine;
s6: according to the hydrofluoric acid: nitric acid: sulfuric acid ═ 3: 3: 4, preparing a corrosion solvent, wherein the concentration of hydrofluoric acid is 50%, and the concentrations of nitric acid and sulfuric acid are 100%;
s7: soaking the glass fiber obtained in the step S5 in a corrosion solvent for corrosion;
s8: cleaning the corroded glass fiber and carrying out surface treatment to obtain the glass fiber to be detected;
s9: the parameters of the glass filaments obtained in S8 were examined by microscope and recorded.
Further, the S8 specifically includes the following steps:
s81: preliminarily washing the corroded glass fiber with water;
s82: cleaning the preliminarily washed glass fibers with a cleaning agent until the cylindrical glass fibers are mutually separated, wherein the temperature of the cleaning agent is 60 ℃, and the cleaning time is 3 min;
s83: drying the separated glass fibers by a dryer;
s84: carrying out surface treatment on the dried glass fiber by using a surface polishing device to ensure that the outer diameter of the glass fiber is 1.795-1.805mm and the length of the glass fiber is 6.8-7.1 mm;
s85: and repeating the steps S81 and S83 in sequence to obtain the glass fiber to be detected.
Further, the specification of the inner hole in S2 is a square hole of 0.250X0.250mm, the preset parameters of the glass mother rod in S3 are 2.0-2.1mm of outer diameter, and the length in S5 is 7.0-7.5 mm.
Further, the temperature of the corrosion solvent in S7 is 30-35 ℃, and the soaking time is controlled at 100-120 minutes.
Furthermore, the grinding micro powder is prepared by taking aluminum oxide powder as a raw material and smelting and crystallizing the aluminum oxide powder in an electric arc furnace at 2800 ℃.
Further, the temperature of the dryer in S83 is set to 200 degrees celsius, and the drying time is 3 min.
(III) advantageous effects
Compared with the prior art, the invention provides a preparation method of a four-cilium tubule, which has the following beneficial effects:
1. according to the invention, the inner hole of the glass mother rod is processed by using the steel wire and the grinding micro powder, so that the inner hole is expanded and formed, the operation and control are easier, the inner hole is corroded and formed through the physicochemical reaction between the corrosive solvent and the glass fiber, the internal stress of the product can be reduced, and the problems of cracking and the like on the product can be prevented.
2. According to the invention, the glass filaments after wire drawing forming are adhered to each other through the rosin and the beeswax, so that the subsequent integral cutting of the glass filaments is facilitated, the production efficiency of the product is improved, the corroded glass filaments are cleaned and subjected to surface treatment, the influence of impurities on the appearance of the product can be prevented, and the attractiveness of the product is improved.
Drawings
FIG. 1 is a flow chart of a method of making four ciliated tubules;
FIG. 2 is a detailed flowchart of S8 in a method of making four ciliated tubules;
fig. 3 is a detailed flowchart of S8 in the second embodiment of the method for making four ciliated tubules.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1 and fig. 2, a method for preparing a four-ciliated tubule according to an embodiment of the present invention includes the following steps:
s1: a steel wire is taken to penetrate through an inner hole of the glass mother rod, and two ends of the glass mother rod are clamped by a clamp;
s2: coating grinding micro powder on the surface of the steel wire, and enabling the steel wire to rotate or linearly move in the inner hole to expand the inner hole to a proper size;
s3: grinding the outer diameter of the glass mother rod to meet preset parameters through the machining of a cylindrical grinding machine;
s4: drawing the glass mother rod into a proper glass fiber on a drawing tower;
s5: adhering a plurality of glass filaments by rosin and beeswax to form a cylindrical structure, and cutting the cylindrical structure into required lengths by an inner circle cutting machine;
s6: according to the following steps of hydrofluoric acid: nitric acid: sulfuric acid ═ 3: 3: 4, preparing a corrosion solvent, wherein the concentration of hydrofluoric acid is 50%, and the concentrations of nitric acid and sulfuric acid are 100%;
s7: soaking the glass fiber obtained in the step S5 in a corrosion solvent for corrosion;
s8: cleaning the corroded glass fiber and carrying out surface treatment to obtain the glass fiber to be detected;
s9: the parameters of the glass filaments obtained in S8 were examined by microscope and recorded.
In this embodiment, the steel wire is required to rotate or slide in the inner hole of the glass mother rod, so that the steel wire generates a large friction force with the inner hole under the action of the grinding micro powder, thereby expanding the inner hole, and after expanding the inner hole to a square hole of 0.250x0.250mm, the outer surface of the glass mother rod is processed by using a cylindrical grinder, thereby the outer diameter of the glass mother rod reaches 2.0-2.1mm, and then the glass mother rod is elongated by a drawing tower, on the way of elongation, the wall thickness of the glass mother rod is reduced, and after enough time of pulling, the glass rod is suitable for preset outer diameter parameters, and then the formed glass wires are adhered together by using rosin and beeswax, the glass wires are cut into required lengths by an inner circle cutting machine, and the glass wires after wire drawing are adhered together by using the rosin and beeswax, thereby being beneficial to subsequent integral cutting of the glass wires, and improving the production efficiency of products, allocate the corrosion solvent immediately, and put into the corrosion solvent with the glass silk after the cutting, through the materialization reaction between corrosion solvent and the glass silk, realize the corrosion molding of hole, but then the internal stress of reducible product, prevent to produce the crack scheduling problem on the product, through rinsing the glass silk after will corroding, get rid of corrosion solvent, rosin and beeswax, avoid its outward appearance that influences the product, through surface treatment, obtain the glass silk that waits to detect, observe and record the parameter of product through the microscope, select qualified product.
As shown in fig. 2, in some embodiments: s8 specifically includes the following steps:
s81: preliminarily washing the corroded glass fiber with water;
s82: cleaning the preliminarily washed glass fibers with a cleaning agent until the cylindrical glass fibers are mutually separated, wherein the temperature of the cleaning agent is 60 ℃, and the cleaning time is 3 min;
s83: drying the separated glass fibers by a dryer;
s84: carrying out surface treatment on the dried glass fiber by using a surface polishing device to ensure that the outer diameter of the glass fiber is 1.795-1.805mm and the length of the glass fiber is 6.8-7.1 mm;
s85: and repeating the steps S81 and S83 in sequence to obtain the glass fiber to be detected.
In the embodiment, the corrosive solvent on the surface of the glass fiber needs to be washed by water firstly to avoid the adhesion of the corrosive solvent on the surface of the glass fiber and reduce the influence of the corrosive solvent on the subsequent operation, then the glass fiber is washed by the cleaning agent, the temperature of the cleaning agent is controlled to be 60 ℃, the cleaning time is 3min, the removal of rosin and beeswax can be effectively realized, so that the glass fiber which is mutually adhered forms an independent individual body, the subsequent processing is convenient, the washed glass fiber is dried to reduce the influence of water stain, after the glass fiber is dried, each parameter of the glass fiber is further adjusted by a surface polishing device to reach the preset parameter and improve the aesthetic degree of the appearance of the product, the polished glass fiber is further washed by water to remove the scraps on the surface of the glass fiber, and then the glass fiber is dried again by a dryer to ensure the drying of the surface of the product, and the water stain is prevented from influencing the detection result.
As shown in fig. 1, in some embodiments: the specification of the inner hole in the S2 is a square hole with the diameter of 0.250X0.250mm, the preset parameters of the glass mother rod in the S3 are 2.0-2.1mm of outer diameter and 7.0-7.5mm of length in the S5.
As shown in fig. 1, in some embodiments: the temperature of the corrosion solvent in the S7 is 30-35 ℃, the soaking time is controlled at 100-120 minutes, and the corrosion forming of the inner hole is realized through the physicochemical reaction between the corrosion solvent and the glass fiber, so that the internal stress of the product can be reduced, and the problems of cracking and the like on the product can be prevented.
As shown in fig. 1, in some embodiments: the grinding micro powder is prepared by smelting and crystallizing aluminum oxide powder serving as a raw material in an electric arc furnace at 2800 ℃, so that the grinding effect between a steel wire and an inner hole is improved, and the expansion of the inner hole is facilitated.
As shown in fig. 2, in some embodiments: and the temperature of the dryer in the S83 is set to be 200 ℃, and the drying time is 3min, so that the surface of the product is ensured to be dried, and the influence of water stains on the subsequent operation is avoided.
Example two
The embodiment provides a method for preparing a four-fiber capillary, and the technical scenario realized by the embodiment is the same as that realized by the first embodiment, which is not described herein again. As shown in fig. 3, the method specifically includes the following steps:
s81: preliminarily washing the corroded glass fiber with water;
s82: cleaning the preliminarily washed glass fibers with a cleaning agent until the cylindrical glass fibers are mutually separated, stirring the cleaning solution at 20r/min by using stirring equipment, and obtaining a single glass fiber after the stirring lasts for 1 min;
s83: drying the separated glass fibers by a dryer;
s84: carrying out surface treatment on the dried glass fiber by using a surface polishing device to ensure that the outer diameter of the glass fiber is 1.795-1.805mm and the length of the glass fiber is 6.8-7.1 mm;
s85: and repeating the steps S81 and S83 in sequence to obtain the glass fiber to be detected.
In the embodiment, the corrosive solvent on the surface of the glass fiber needs to be washed by water firstly to avoid adhesion to the surface of the glass fiber and reduce the influence of the corrosive solvent on subsequent operation, then the glass fiber is washed by a cleaning agent, the cleaning solution is stirred for 1min by stirring equipment, and the rosin and the beeswax can be effectively removed, so that the glass fiber which is mutually adhered forms an independent individual body, the subsequent processing is convenient, the washed glass fiber is dried to reduce the influence of water stain, after drying, each parameter of the glass fiber is further adjusted by a surface polishing device to reach the preset parameter and improve the attractiveness of the appearance of the product, the polished glass fiber is further washed by water to remove chips on the surface of the glass fiber, and then the glass fiber is dried again by a dryer to ensure the drying of the surface of the product, avoid water stain influence detection result
The working principle is as follows: when the device is used, a steel wire is required to rotate or slide in an inner hole of the glass mother rod, so that the steel wire generates a larger friction force with the inner hole under the action of micro powder grinding, the inner hole is reamed to a square hole of 0.250X0.250mm, the outer surface of the glass mother rod is processed by using a cylindrical grinder, so that the outer diameter of the glass mother rod reaches 2.0-2.1mm, the glass mother rod is drawn out by a drawing tower, the wall thickness of the glass mother rod is reduced in the drawing process, the glass mother rod is drawn for enough time to be suitable for preset outer diameter parameters, formed glass wires are adhered together by using rosin and beewax, the glass wires are cut into required lengths by an inner circle cutting machine, the drawn and formed glass wires are adhered together by using the rosin and the beewax, the subsequent integral cutting is facilitated, the production efficiency of products is improved, and a corrosive solvent is prepared, putting the cut glass filaments into a corrosion solvent, realizing corrosion molding of an inner hole through physicochemical reaction between the corrosion solvent and the glass filaments, further reducing the internal stress of a product, preventing the product from generating cracks and the like, further washing the corrosion solvent on the surface of the glass filaments by water, avoiding the adhesion of the corrosion solvent on the surface of the glass filaments, reducing the influence of the corrosion solvent on subsequent operation, then washing the glass filaments by a cleaning agent, effectively realizing the removal of rosin and beeswax, so that the mutually adhered glass filaments form independent individuals, facilitating subsequent processing, drying the washed glass filaments, reducing the influence of water stains, further adjusting each parameter of the glass filaments through a surface polishing device after drying, leading the glass filaments to reach preset parameters and improve the aesthetic degree of the appearance of the product, further washing the polished glass filaments by water, the glass fiber drying device comprises a dryer, a water stain detector, a microscope, a water stain detector, a controller and a controller.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A preparation method of four ciliated tubules is characterized by comprising the following steps:
s1: a steel wire is taken to penetrate through an inner hole of the glass mother rod, and two ends of the glass mother rod are clamped by a clamp;
s2: coating grinding micro powder on the surface of the steel wire, and enabling the steel wire to rotate or linearly move in the inner hole to expand the inner hole to a proper size;
s3: grinding the outer diameter of the glass mother rod to meet preset parameters through the machining of a cylindrical grinding machine;
s4: drawing the glass mother rod into proper glass filaments on a drawing tower;
s5: adhering a plurality of glass filaments by rosin and beeswax to form a cylindrical structure, and cutting the cylindrical structure into required lengths by an inner circle cutting machine;
s6: according to the following steps of hydrofluoric acid: nitric acid: sulfuric acid 3: 3: 4, preparing a corrosion solvent, wherein the concentration of hydrofluoric acid is 50%, and the concentrations of nitric acid and sulfuric acid are 100%;
s7: soaking the glass fiber obtained in the step S5 in a corrosion solvent for corrosion;
s8: cleaning the corroded glass fiber and carrying out surface treatment to obtain the glass fiber to be detected;
s9: the parameters of the glass filaments obtained in S8 were examined by microscope and recorded.
2. The method of claim 1, wherein the four ciliated tubules are formed by: the S8 specifically includes the following steps:
s81: preliminarily washing the corroded glass fiber with water;
s82: cleaning the preliminarily washed glass fibers with a cleaning agent until the cylindrical glass fibers are mutually separated, wherein the temperature of the cleaning agent is 60 ℃, and the cleaning time is 3 min;
s83: drying the separated glass fibers by a dryer;
s84: carrying out surface treatment on the dried glass fiber by using a surface polishing device to ensure that the outer diameter of the glass fiber is 1.795-1.805mm and the length of the glass fiber is 6.8-7.1 mm;
s85: and repeating the steps S81 and S83 in sequence to obtain the glass fiber to be detected.
3. The method of claim 1, wherein the four ciliated tubules are formed by: the specification of the inner hole in S2 is a square hole with the diameter of 0.250X0.250mm, the preset parameters of the glass mother rod in S3 are 2.0-2.1mm of outer diameter, and the length in S5 is 7.0-7.5 mm.
4. The method of claim 1, wherein the four ciliated tubules are formed by: the temperature of the corrosion solvent in the S7 is 30-35 ℃, and the soaking time is controlled at 100-120 minutes.
5. The method of claim 1, wherein the four ciliated tubules are formed by: the grinding micro powder is prepared by taking alumina as a raw material and smelting and crystallizing at 2800 ℃ in an electric arc furnace.
6. The method of claim 2, wherein the method comprises the following steps: and the temperature of the dryer in the S83 is set to be 200 ℃, and the drying time is 3 min.
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| CN1089580A (en) * | 1992-11-19 | 1994-07-20 | 信越石英株式会社 | Large size quartz glass tube, preform and manufacture method thereof and quartz glass optical fibre |
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Application publication date: 20220617 |