Optical fiber drawing and polishing liquid, preparation method and optical fiber drawing and polishing process

Abstract

The present invention relates to an optical fiber drawing and grinding liquid, a preparation method thereof, and an optical fiber drawing and grinding process, belonging to the technical field of optical fiber processing. The optical fiber drawing and grinding liquid includes nano silicon carbide powder, purified water, hydrophilic dispersant, water-soluble suspending agent, and diol monomer humectant; wherein, the weight ratio of nano silicon carbide powder, purified water, and diol monomer humectant is (2-4):(4-8):(1-3), the dispersant is 10%-30% of the weight of purified water, and the suspending agent is 5%-20% of the weight of purified water; the particle size range of the nano silicon carbide powder is 0.3um≤α<1um. With this grinding liquid, good grinding effect and good optical properties of the optical fiber drawing can be achieved. The particle size range of the nano silicon carbide powder is set to 0.3um≤α<1um, and the component dosages of purified water, hydrophilic dispersant, water-soluble suspending agent, and diol monomer humectant are adaptively adjusted based on this particle size range to achieve the expected optical fiber grinding effect while reducing costs.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical fiber processing. Specifically, it relates to an optical fiber drawing and grinding liquid, a preparation method, and an optical fiber drawing and grinding process. Background Art

[0002] Optical fiber communication is a communication method that uses optical fibers as the transmission medium and optical signals as the information carrier. The three major pillars of modern communication networks are optical fiber communication, satellite communication, and radio communication, and optical fiber communication is the main body among them. Optical fibers play an irreplaceable role in the infrastructure construction of the information superhighway.

[0003] Optical fiber communication mainly conducts communication through optical fiber lines. Among them, optical fiber lines are composed of optical fibers, optical fiber connectors, and optical fiber adapters. The function of optical fiber lines is to transmit the optical signals from the optical transmitter to the optical receiver with as little distortion and attenuation as possible. Optical fiber connectors, commonly known as flexible connectors, are mainly used to achieve non-permanent fixed connections between devices in the system, between devices and instruments, between devices and optical fibers, and between optical fibers and optical fibers. They are essential devices for connecting various devices in optical fiber communication systems and are also the optical fiber devices with the largest usage amount currently. Optical fiber connectors include FC, SC, ST, LC, D4, DIN, MU, MT, etc.

[0004] Currently, the insertion loss of MT active optical fiber connectors has been able to reach less than 0.2 dB, and the multimode return loss can also reach more than 40 dB (PC surface) and 65 dB (APC surface). However, since optical fibers belong to hard and brittle materials, the theoretical values of the elastic limit and strength limit of such materials are very close. During the mechanical processing process, when the load it bears is slightly higher than the elastic limit, it will undergo fracture failure, resulting in cracks, breakage, and pits on the processed surface, affecting the surface quality and optical properties of the material. Therefore, it is difficult to control the processing quality of MT connectors, seriously affecting product performance and production costs. For high-end application fields, MT connectors are required to have a super-smooth processing surface at the nanoscale and maintain good material properties. In this case, there are high requirements for the formula of the core fine grinding and drawing grinding liquid in the MT connector processing process. After grinding with the existing drawing grinding liquid, the edge of the optical fiber end face is prone to chipping, and the optical fiber height is too high, resulting in easy damage to the end face during the physical docking of the connector, affecting the optical performance of the product.

[0005] Therefore, it is necessary to provide an optical fiber drawing and grinding liquid, a preparation method, and an optical fiber drawing and grinding process to overcome the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide an optical fiber drawing and grinding liquid, a preparation method, and an optical fiber drawing and grinding process to improve the grinding quality of the optical fiber end face and the optical performance of the optical fiber connector.

[0007] To achieve the above object, a first aspect of the present invention provides an optical fiber drawing and grinding liquid, comprising nano silicon carbide powder, purified water, hydrophilic dispersant, water-soluble suspending agent, and diol monomer humectant;

[0008] Among them, the weight ratio of the nano silicon carbide powder, the purified water, and the diol monomer humectant is (2 - 4):(4 - 8):(1 - 3), the dispersant is 10% - 30% of the weight of the purified water, and the suspending agent is 5% - 20% of the weight of the purified water;

[0009] The particle size range of the nano silicon carbide powder is 0.3um ≤ α < 1um.

[0010] In some embodiments, the particle size range of the nano silicon carbide powder is 0.5um ≤ α ≤ 0.8um.

[0011] In some embodiments, the dispersant includes modified polyether phosphate ester compounds containing hydrophilic groups.

[0012] In some embodiments, the suspending agent includes water-soluble liquid polymers, emulsifiers, and water-soluble celluloses.

[0013] In some embodiments, the diol monomer humectant includes ethylene glycol.

[0014] In some embodiments, an antifoaming agent is further included, and the antifoaming agent is 1‰ - 10‰ of the weight of the purified water. The antifoaming agent includes organopolysiloxane complexes, long-chain alkane carboxylates, dispersants, and non-ionic surfactants.

[0015] A second aspect of the present invention provides a method for preparing an optical fiber drawing and grinding liquid, comprising the following steps:

[0016] Step 1: Weigh the following in parts by weight: 20 - 40 parts by weight of nano silicon carbide powder, 40 - 80 parts by weight of purified water, 10 - 30 parts by weight of diol monomer humectant, the dispersant is 10% - 30% of the weight of the purified water, and the suspending agent is 5% - 20% of the weight of the purified water, and set aside;

[0017] Step 2: Add the purified water into a stirring barrel and stir at a low speed;

[0018] Step 3: Add the dispersant into the purified water and stir at a low speed for 3 - 8 minutes;

[0019] Step 4: Add the nano silicon carbide powder into the purified water and stir at a medium speed for 8 - 12 minutes;

[0020] Step 5: Add the suspending agent into the purified water and stir at a medium speed for 12 - 18 minutes;

[0021] Step 6: Add the diol monomer humectant to the purified water and stir at medium speed for 8 - 12 minutes;

[0022] Step 7: Complete the proportioning, encapsulate, and store in the warehouse.

[0023] In some embodiments, in Step 1, the defoaming agent is also weighed at 1‰ - 10‰ of the purified water.

[0024] Between Step 6 and Step 7, the following is also included: Add the defoaming agent to the purified water and stir at medium speed for 8 - 12 minutes.

[0025] In some embodiments, in Step 3, the dispersant is stirred at low speed for 5 minutes;

[0026] In Step 4, the nano - silicon carbide powder is stirred at medium speed for 10 minutes;

[0027] In Step 5, the suspending agent is stirred at medium speed for 15 minutes;

[0028] In Step 6, the diol monomer humectant is stirred at medium speed for 10 minutes;

[0029] After Step 6, the defoaming agent is stirred at medium speed for 10 minutes.

[0030] The third aspect of the present invention provides an optical fiber drawing and grinding process, which is characterized in that: The above - prepared optical fiber drawing and grinding liquid is used to grind the drawn optical fiber by using the above - mentioned preparation method;

[0031] During the grinding process, the grinding pressure is 4000 - 6000 grams, the grinding speed is 160 - 200 r / s, and the grinding time is 100 - 120 s.

[0032] The beneficial effects of the present invention:

[0033] In the solution of the present invention, when the particle size α of the nano - silicon carbide powder is less than 1 um, the particle size of the silicon carbide powder is relatively small, which is beneficial to reducing the condensation degree of the nano - silicon carbide powder and reducing the impact force on the drawn optical fiber. In addition, when the particle size α of the nano - silicon carbide powder is greater than or equal to 0.3 um, the particle size of the nano - silicon carbide powder is not too small, ensuring a certain optical fiber grinding force and making the grinding efficiency relatively high. When the particle size of the nano - silicon carbide powder is too small, the grinding force is insufficient, resulting in a lower height of the optical fiber, which cannot meet the industry IEC standard of 1000 nm - 3500 nm.

[0034] The dispersant is conducive to uniformly dispersing the nano silicon carbide powder in the grinding fluid; the function of the suspending agent is to uniformly disperse the nano silicon carbide particles in water to keep them in a suspended state so that they do not sink rapidly, thereby maintaining the concentration of the grinding fluid and uniformly dispersing the nano silicon carbide particles in the grinding fluid; usually, the dispersant and the suspending agent are prone to oxidation, and after oxidation, they will lose or reduce the original dispersing and suspending effects, resulting in the aggregation of nano silicon carbide particles in the drawn fiber grinding fluid to form large particles or poor suspension, directly affecting the drawn fiber grinding effect and causing the fiber height to be too high. In this case, by configuring a diol monomer humectant, it can prevent water evaporation, absorb moisture and maintain humidity during fiber grinding, reduce and delay the oxidation of the dispersant and the suspending agent, so that during the grinding process, the grinding fluid can maintain a good grinding effect.

[0035] In addition, the weight ratio of the nano silicon carbide powder to the diol monomer humectant is (2 - 4):(4 - 8), which is conducive to the nano silicon carbide powder having a higher concentration in water and achieving a good grinding effect on the optical fiber; the dispersant is 10% - 30% of the weight of the purified water, which is conducive to dispersing the nano silicon carbide powder with a higher concentration, so as to better uniformly disperse the nano silicon carbide powder in the grinding fluid; the suspending agent is 5% - 20% of the weight of the purified water, which is conducive to uniformly dispersing the nano silicon carbide particles with a higher concentration in water to keep them in a suspended state so that they do not sink rapidly, thereby maintaining a higher concentration of nano silicon carbide particles in the grinding fluid and uniformly dispersing them in the grinding fluid; the weight ratio of the purified water to the diol monomer humectant is (4 - 8):(1 - 3), which is conducive to the diol monomer humectant having a larger content to better prevent water evaporation, thereby absorbing moisture and maintaining humidity, reducing and delaying the oxidation of the dispersant and the suspending agent, so that during the grinding process, the grinding fluid can maintain a good grinding effect.

[0036] Based on the above, during the grinding process, the force on the end face of the optical fiber is relatively uniform and the impact force is small, resulting in a good drawn fiber grinding effect and thus good optical properties. In addition, considering cost, the particle size range of the nano silicon carbide powder is set to 0.3um ≤ α < 1um, and the component dosages of the purified water, the hydrophilic dispersant, the water-soluble suspending agent, and the diol monomer humectant are adaptively adjusted based on this particle size range to achieve the expected optical fiber grinding effect while reducing costs. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0038] In the prior art, the maximum particle size of the silicon carbide powder used in the optical fiber drawing and grinding liquid is 1-2 μm. During the grinding process, due to the relatively large particle size of the silicon carbide powder, which is prone to agglomeration and uneven distribution, and the relatively high grinding speed, in this case, the optical fiber end face is prone to being subjected to large and uneven forces, resulting in easy chipping at the edge of the end face after grinding, which affects the optical performance of the product.

[0039] Based on the above problems, the present invention provides an optical fiber drawing and grinding liquid, comprising nano-silicon carbide powder, purified water, a hydrophilic dispersant, a water-soluble suspending agent, and a diol monomer humectant; wherein, the weight ratio of the nano-silicon carbide powder, purified water, and diol monomer humectant is (2-4):(4-8):(1-3), the dispersant is 10%-30% of the weight of the purified water, and the suspending agent is 5%-20% of the weight of the purified water; the particle size range of the nano-silicon carbide powder is 0.3 μm ≤ α < 1 μm.

[0040] Among them, the particle size range of 0.3 μm ≤ α < 1 μm of the nano-silicon carbide powder represents the particle size range of the maximum particle size of the nano-silicon carbide powder, and most of the particle sizes of the nano-silicon carbide powder are controlled to be 0.3 μm ≤ α < 1 μm. For example, the particle sizes of more than 50% of the nano-silicon carbide powder are controlled to be 0.3 μm ≤ α < 1 μm. Of course, according to the selection, it can also be 60% or 70% or more or other ratios of the nano-silicon carbide powder whose particle sizes are controlled to be 0.3 μm ≤ α < 1 μm. The other ratio is selected in the range greater than 50% so that most of the particle sizes of the nano-silicon carbide powder are controlled to be 0.3 μm ≤ α < 1 μm. The particle size α of the nano-silicon carbide powder being less than 1 μm can make the particle size of the silicon carbide powder smaller, which is beneficial to reducing the agglomeration degree of the nano-silicon carbide powder and reducing the impact force on the optical fiber after drawing. In addition, the particle size α of the nano-silicon carbide powder being greater than or equal to 0.3 μm ensures that the particle size of the nano-silicon carbide powder is not too small, guaranteeing a certain optical fiber grinding force and making the grinding efficiency relatively high. When the particle size of the nano-silicon carbide powder is too small, the grinding force is insufficient, resulting in the optical fiber height being too low to meet the industry IEC standard of 1000 nm - 3500 nm.

[0041] The dispersant is beneficial to uniformly disperse the nano-silicon carbide powder in the grinding liquid; the function of the suspending agent is to uniformly disperse the nano-silicon carbide particles in water to keep them in a suspended state so that they do not sink rapidly, thereby maintaining the concentration of the grinding liquid and uniformly dispersing the nano-silicon carbide particles in the grinding liquid; generally, the dispersant and the suspending agent are prone to oxidation. After oxidation, they will lose or reduce the original dispersion and suspension functions, resulting in the aggregation of nano-silicon carbide particles in the prepared drawing and grinding liquid to form large particles or poor suspension, directly affecting the drawing and grinding effect and causing the optical fiber height to be too high. In this case, by configuring the diol monomer humectant, moisture evaporation is prevented and moisture is absorbed and retained during the grinding of the optical fiber, reducing and delaying the oxidation of the dispersant and the suspending agent, so that during the grinding process, the grinding liquid can maintain a good grinding effect.

[0042] In addition, the weight ratio of nano silicon carbide powder to diol monomer humectant is (2 - 4):(4 - 8), which is beneficial to the nano silicon carbide powder having a high concentration in water and achieving a good grinding effect on the optical fiber; the dispersant is 10% - 30% of the weight of purified water, which is beneficial to the dispersion of the nano silicon carbide powder with a high concentration, so as to better disperse the nano silicon carbide powder evenly in the grinding fluid; the suspending agent is 5% - 20% of the weight of purified water, which is beneficial to evenly dispersing the nano silicon carbide particles with a high concentration in water and keeping them in a suspended state so that they do not sink rapidly, thereby keeping the concentration of nano silicon carbide particles in the grinding fluid high and evenly dispersed in the grinding fluid; the weight ratio of purified water to diol monomer humectant is (4 - 8):(1 - 3), which is beneficial to the diol monomer humectant having a large content to better prevent water evaporation, thus absorbing moisture and keeping it moist, reducing and delaying the oxidation of the dispersant and the suspending agent, so that during the grinding process, the grinding fluid can maintain a good grinding effect.

[0043] The water is purified water, such as distilled water, deionized water, high-purity water, etc., to prevent more impurities in the water from affecting the uniformity of the nano silicon carbide powder in the water and improve the grinding effect.

[0044] The dispersant is a modified polyether phosphate compound containing a hydrophilic group, or other dispersants having a hydrophilic group, which is not limited herein and is set according to needs.

[0045] The water-soluble suspending agent includes at least one of water-soluble liquid polymers, water-soluble celluloses, etc. This is the prior art and will not be elaborated herein one by one. Substances such as emulsifiers or dispersants can be added according to needs.

[0046] The diol monomer humectant includes at least one of monomolecular humectant diols such as ethylene glycol and propylene glycol, which is not limited herein as long as it has a moisture absorption and moisture retention effect and reduces and delays the oxidation of the dispersant and the suspending agent.

[0047] Based on the above, during the grinding process, the force on the end face of the optical fiber is relatively uniform and the impact force received is small, so that the drawing and grinding effect of the optical fiber is good, and thus it has good optical properties. In addition, considering cost, the particle size range of the nano silicon carbide powder is set to 0.3um ≤ α < 1um, and the component dosages of purified water, hydrophilic dispersant, water-soluble suspending agent, and diol monomer humectant are adjusted adaptively based on this particle size range to achieve the expected optical fiber grinding effect while reducing costs.

[0048] In some embodiments, the particle size range of the nano silicon carbide powder is 0.5um ≤ α ≤ 0.8um, which is beneficial to making the nano silicon carbide powder smaller and more uniform in size. The dispersant and the suspending agent can more easily act on the nano silicon carbide particles, enabling the nano silicon carbide particles to be more uniformly distributed in water. During the grinding process, it further has a better optical fiber grinding effect and improves the optical performance of the fiber optic connector.

[0049] In some embodiments, the dispersant includes a modified polyether phosphate compound containing a hydrophilic group, such as the dispersant with the model number 8605 from Guangzhou Runhong Chemical Co., Ltd. Among them, the modified polyether phosphate compound containing a hydrophilic group can have good dispersibility and adhesion. When the modified polyether phosphate compound is dissolved in water, it adsorbs and drives the nano silicon carbide particles to disperse in water, making the nano silicon carbide particles more uniformly distributed in water. In addition, the modified polyether phosphate compound has a certain moisturizing property, making the oxidation property of the modified polyether phosphate compound lower, which is beneficial to the more persistent uniform dispersion of the nano silicon carbide particles.

[0050] In some embodiments, the suspending agent component is composed of a water-soluble liquid polymer, an emulsifier, a water-soluble cellulose, etc., such as the suspending agent with the model number M-205 from Qingdao Wanjiahuixin Surface Materials Technology Co., Ltd., to better combine with the nano silicon carbide particles, thereby better uniformly dispersing the nano silicon carbide particles in water and keeping them in a suspended state so that they do not sink rapidly, and the suspension effect is better.

[0051] In some embodiments, the diol monomer humectant includes ethylene glycol. This ethylene glycol has a moisturizing effect, is easily soluble in water and has good dissolution and penetration effects. It can better dissolve and diffuse the organic matter in the suspending agent and the modified polyether phosphate compound, has a stronger moisturizing effect on the suspending agent and the dispersant. The formed grinding liquid can better enhance the dispersion effect of the dispersant and the suspension effect of the suspending agent, thereby further enhancing the uniform dispersion of the nano silicon carbide particles and improving the optical fiber grinding effect. Also, ethylene glycol is a neutral substance and has weak corrosiveness to the human body, which is beneficial for the operation of the operator.

[0052] In some embodiments, since the grinding liquid needs to be shaken well before grinding to make the nano silicon carbide in the grinding liquid evenly distributed, and because the nano silicon carbide is usually obtained by artificial means and contains more impurities, the grinding liquid is prone to generate more foam during the shaking process. Therefore, the grinding liquid also includes an antifoaming agent. The antifoaming agent is 1‰ - 10‰ of the weight of the purified water. The antifoaming agent includes an organopolysiloxane complex, a long-chain alkane carboxylate, a dispersant, and a non-ionic surfactant to quickly remove the foam. In this embodiment, the antifoaming agent uses the antifoaming agent with the model number KR-XP98 / 500ml from Jiangsu Kuorun Chemical Co., Ltd.

[0053] In some embodiments, the present invention also provides a method for preparing an optical fiber drawing and grinding liquid, comprising the following steps:

[0054] Step 1: Weigh the following in parts by weight: 20 - 40 parts by weight of nano silicon carbide powder, 40 - 80 parts by weight of purified water, 10 - 30 parts by weight of diol monomer humectant, the dispersant is 10% - 30% of the weight of purified water, and the suspending agent is 5% - 20% of the weight of purified water, for later use; Step 2: Add the purified water into a stirring barrel and stir at a low speed; Step 3: Add the dispersant into the purified water and stir at a low speed for 3 - 8 minutes; Step 4: Add the nano silicon carbide powder into the purified water and stir at a medium speed for 8 - 12 minutes; Step 5: Add the suspending agent into the purified water and stir at a medium speed for 12 - 18 minutes; Step 6: Add the diol monomer humectant into the purified water and stir at a medium speed for 8 - 12 minutes; Step 7: After the proportioning is completed, package and store in the warehouse.

[0055] Among them, stirring the dispersant at a low speed for 3 - 8 minutes is beneficial for the dispersant to better dissolve in water; the dispersant dissolves in water prior to the nano silicon carbide powder, which is beneficial for the dispersant to fully disperse the nano silicon carbide evenly; the suspending agent is added to water after the nano silicon carbide powder, which is beneficial for the suspending agent to have a good suspending effect on the dispersed nano silicon carbide; and the diol monomer humectant is added to water after the suspending agent and the dispersant, which is beneficial for reducing and delaying the oxidation of the suspending agent and the dispersant; stirring the nano silicon carbide powder, the suspending agent and the diol monomer humectant at a medium speed in purified water is beneficial for accelerating the diffusion speed. When stirring too fast or too slow, the silicon carbide particles are likely to aggregate.

[0056] In some embodiments, step 1 further includes weighing the defoaming agent at 1‰ - 10‰ of the purified water,

[0057] Between step 6 and step 7, it further includes: adding the defoaming agent into the purified water and stirring at a medium speed for 8 - 12 minutes.

[0058] In some embodiments, in step 3, the dispersant is stirred at a low speed for 5 minutes; in step 4, the nano silicon carbide powder is stirred at a medium speed for 10 minutes; in step 5, the suspending agent is stirred at a medium speed for 15 minutes; in step 6, the diol monomer humectant is stirred at a medium speed for 10 minutes; after step 6, the defoaming agent is stirred at a medium speed for 10 minutes.

[0059] In some embodiments, the present invention also provides an optical fiber drawing and grinding process, using the optical fiber drawing and grinding liquid prepared according to the above preparation method to grind the drawn optical fiber; during the grinding process, the grinding pressure is 4000 - 6000 grams, the grinding speed is 160 - 200 r / s, and the grinding time is 100 - 120 s, which is beneficial for the good uniformity of nano silicon carbide in the grinding liquid, thereby having a good grinding effect on the optical fiber.

[0060] Among them, the grinding machine used in the grinding process is Shengming MT central pressure grinding machine, Hanxin MT central pressure grinding machine or Boles MT central pressure grinding machine.

[0061] Preferably, the grinding pressure is 5000 grams, the grinding speed is 180 r / s, and the grinding time is 110 s to achieve better grinding effect.

[0062] The following are the embodiments of the preparation method of the optical fiber drawing grinding fluid and the optical fiber drawing grinding process, as follows:

[0063] Example 1

[0064] Step 1: Weigh the following in parts by weight: 20 parts by weight of nano silicon carbide powder with a maximum particle size of 0.3 um, 40 parts by weight of distilled water, 10 parts by weight of ethylene glycol, the dispersant of model 8605 from Guangzhou Runhong Chemical Co., Ltd. is 10% of the weight of distilled water, the suspending agent of model M-205 from Qingdao Wanjiahuixin Surface Material Technology Co., Ltd. is 5% of the weight of distilled water, and the defoaming agent of model KR-XP98 / 500ml is 1‰ of the weight of distilled water, for later use;

[0065] Step 2: Add distilled water into the stirring barrel and stir at low speed.

[0066] Step 3: Add the modified polyether phosphate compound with hydrophilic group into the distilled water and stir at low speed for 3 minutes.

[0067] Step 4: Add nano silicon carbide powder into the distilled water and stir at medium speed for 8 minutes.

[0068] Step 5: Add the suspending agent into the distilled water and stir at medium speed for 12 minutes.

[0069] Step 6: Add ethylene glycol into the distilled water and stir at medium speed for 8 minutes.

[0070] Step 7: Add the defoaming agent into the distilled water and stir at medium speed for 8 minutes.

[0071] Step 8: After the proportioning is completed, package and store in the warehouse.

[0072] For grinding the MT12-core multimode fiber optic connector product, place the prepared optical fiber grinding fluid on the grinding platform, drive the MT12-core connector clamped by the grinding machine to move to contact the optical fiber grinding fluid on the grinding platform, and drive the grinding platform to rotate.

[0073] During the grinding process, the grinding pressure is 4000 grams, the grinding speed is 160 r / s, and the grinding time is 100 s.

[0074] Example 2

[0075] Step 1: Weigh the following in parts by weight: 40 parts by weight of nano silicon carbide powder with a maximum particle size of 0.9 um, 80 parts by weight of distilled water, 30 parts by weight of ethylene glycol, the dispersant of model 8605 from Guangzhou Runhong Chemical Industry Co., Ltd. is 30% of the weight of distilled water, the suspending agent of model M-205 from Qingdao Wanjiahuixin Surface Material Technology Co., Ltd. is 20% of the weight of distilled water, and the defoaming agent of model KR-XP98 / 500ml is 10‰ of the weight of distilled water, and set aside for use;

[0076] Step 2: Add distilled water into the stirring barrel and stir at a low speed;

[0077] Step 3: Add the dispersant into the distilled water and stir at a low speed for 8 minutes;

[0078] Step 4: Add the nano silicon carbide powder into the distilled water and stir at a medium speed for 12 minutes;

[0079] Step 5: Add the suspending agent into the distilled water and stir at a medium speed for 18 minutes;

[0080] Step 6: Add ethylene glycol into the distilled water and stir at a medium speed for 12 minutes;

[0081] Step 7: Add the defoaming agent into the distilled water and stir at a medium speed for 12 minutes;

[0082] Step 8: After the proportioning is completed, package and store in the warehouse.

[0083] Grind the MT12 core multimode fiber optic connector product. Take the prepared fiber optic grinding liquid and place it on the grinding platform. Drive the MT12 core connector clamped by the grinding machine to move to contact the fiber optic grinding liquid on the grinding platform, and drive the grinding platform to rotate.

[0084] During the grinding process, the grinding pressure is 6000 grams, the grinding speed is 200 r / s, and the grinding time is 120 s.

[0085] Example 3

[0086] Step 1: Weigh the following in parts by weight: 25 parts by weight of nano silicon carbide powder with a maximum particle size of 0.5 um, 50 parts by weight of distilled water, 15 parts by weight of ethylene glycol, the dispersant of model 8605 from Guangzhou Runhong Chemical Industry Co., Ltd. is 15% of the weight of distilled water, the suspending agent of model M-205 from Qingdao Wanjiahuixin Surface Material Technology Co., Ltd. is 9% of the weight of distilled water, and the defoaming agent of model KR-XP98 / 500ml is 4‰ of the weight of distilled water, and set aside for use;

[0087] Step 2: Add distilled water into the stirring barrel and stir at a low speed;

[0088] Step 3: Add the dispersant into the distilled water and stir at a low speed for 5 minutes;

[0089] Step 4: Add nano silicon carbide powder to distilled water and stir at medium speed for 10 minutes;

[0090] Step 5: Add a suspending agent to distilled water and stir at medium speed for 15 minutes;

[0091] Step 6: Add ethylene glycol to distilled water and stir at medium speed for 10 minutes;

[0092] Step 7: Add a defoaming agent to distilled water and stir at medium speed for 10 minutes;

[0093] Step 8: After the formulation is completed, package and store in the warehouse.

[0094] For the MT12-core multimode fiber optic connector product, conduct grinding. Take the prepared fiber optic grinding fluid and place it on the grinding platform. Drive the MT12-core connector held by the grinding machine to move until the fiber end face contacts the fiber optic grinding fluid on the grinding platform, and drive the grinding platform to rotate.

[0095] During the grinding process, the grinding pressure is 4500 grams, the grinding speed is 180 r / s, and the grinding time is 110 s.

[0096] Example 4

[0097] Step 1: Weigh the following in parts by weight: 35 parts by weight of nano silicon carbide powder with a maximum particle size of 0.8 um, 70 parts by weight of distilled water, 25 parts by weight of ethylene glycol, 25% of the weight of distilled water of the dispersant with the model number 8605 from Guangzhou Runhong Chemical Co., Ltd., 16% of the weight of distilled water of the suspending agent with the model number M-205 from Qingdao Wanjiahuixin Surface Materials Technology Co., Ltd., and 8‰ of the weight of distilled water of the defoaming agent with the model number KR-XP98 / 500ml, for later use;

[0098] Step 2: Add distilled water to the stirring barrel and stir at low speed;

[0099] Step 3: Add a dispersant to distilled water and stir at low speed for 5 minutes;

[0100] Step 4: Add nano silicon carbide powder to distilled water and stir at medium speed for 10 minutes;

[0101] Step 5: Add a suspending agent to distilled water and stir at medium speed for 15 minutes;

[0102] Step 6: Add ethylene glycol to distilled water and stir at medium speed for 10 minutes;

[0103] Step 7: Add a defoaming agent to distilled water and stir at medium speed for 10 minutes;

[0104] Step 8: After the formulation is completed, package and store in the warehouse.

[0105] Grind the MT12-core multimode fiber optic connector product. Place the prepared fiber optic grinding fluid on the grinding platform. Drive the MT12-core connector held by the grinding machine to move until the fiber end face contacts the fiber optic grinding fluid on the grinding platform, and drive the grinding platform to rotate.

[0106] During the grinding process, the grinding pressure is 5500 grams, the grinding speed is 180 r / s, and the grinding time is 110 s.

[0107] Example 5

[0108] Step 1: Weigh the following in parts by weight: 30 parts by weight of nano silicon carbide powder with a maximum particle size of 0.6 um, 60 parts by weight of distilled water, 20 parts by weight of ethylene glycol, the dispersant with the model number 8605 from Guangzhou Runhong Chemical Co., Ltd. is 20% of the weight of distilled water, the suspending agent with the model number M-205 from Qingdao Wanjiahuixin Surface Material Technology Co., Ltd. is 12% of the weight of distilled water, and the defoaming agent with the model number KR-XP98 / 500ml is 6‰ of the weight of distilled water. Set aside for use.

[0109] Step 2: Add distilled water to the stirring barrel and stir at a low speed.

[0110] Step 3: Add the dispersant to the distilled water and stir at a low speed for 5 minutes.

[0111] Step 4: Add the nano silicon carbide powder to the distilled water and stir at a medium speed for 10 minutes.

[0112] Step 5: Add the suspending agent to the distilled water and stir at a medium speed for 15 minutes.

[0113] Step 6: Add ethylene glycol to the distilled water and stir at a medium speed for 10 minutes.

[0114] Step 7: Add the defoaming agent to the distilled water and stir at a medium speed for 10 minutes.

[0115] Step 8: After the proportioning is completed, package and store in the warehouse.

[0116] Grind the MT12-core multimode fiber optic connector product. Place the prepared fiber optic grinding fluid on the grinding platform. Drive the MT12-core connector held by the grinding machine to move until the fiber end face contacts the fiber optic grinding fluid on the grinding platform, and drive the grinding platform to rotate.

[0117] During the grinding process, the grinding pressure is 5000 grams, the grinding speed is 180 r / s, and the grinding time is 110 s.

[0118] Example 6

[0119] Step 1: Weigh the following in parts by weight: 30 parts by weight of nano silicon carbide powder with a maximum particle size of 0.6 um, 60 parts by weight of distilled water, 20 parts by weight of ethylene glycol, 10% of the weight of distilled water of the dispersant with the model number 8605 from Guangzhou Runhong Chemical Co., Ltd., 5% of the weight of distilled water of the suspending agent with the model number M-205 from Qingdao Wanjiahuixin Surface Material Technology Co., Ltd., and 4‰ of the weight of distilled water of the defoaming agent with the model number KR-XP98 / 500ml, and set aside for use;

[0120] Step 2: Add distilled water into the stirring barrel and stir at a low speed;

[0121] Step 3: Add the dispersant into the distilled water and stir at a low speed for 5 minutes;

[0122] Step 4: Add the nano silicon carbide powder into the distilled water and stir at a medium speed for 10 minutes;

[0123] Step 5: Add the suspending agent into the distilled water and stir at a medium speed for 15 minutes;

[0124] Step 6: Add ethylene glycol into the distilled water and stir at a medium speed for 10 minutes;

[0125] Step 7: Add the defoaming agent into the distilled water and stir at a medium speed for 10 minutes;

[0126] Step 8: After the ratio is completed, package and store in the warehouse.

[0127] For the MT12 core multimode fiber optic connector product, perform grinding. Take the prepared fiber optic grinding liquid and place it on the grinding platform. Drive the MT12 core connector held by the grinding machine to move to contact the fiber optic grinding liquid on the grinding platform, and drive the grinding platform to rotate.

[0128] During the grinding process, the grinding pressure is 5000 grams, the grinding speed is 180 r / s, and the grinding time is 110 s.

[0129] Example 7

[0130] Step 1: Weigh the following in parts by weight: 30 parts by weight of nano silicon carbide powder with a maximum particle size of 0.6 um, 60 parts by weight of distilled water, 20 parts by weight of ethylene glycol, 9% of the weight of distilled water of the dispersant with the model number 8605 from Guangzhou Runhong Chemical Co., Ltd., 7% of the weight of distilled water of the suspending agent with the model number M-205 from Qingdao Wanjiahuixin Surface Material Technology Co., Ltd., and set aside for use;

[0131] Step 2: Add distilled water into the stirring barrel and stir at a low speed;

[0132] Step 3: Add the dispersant into the distilled water and stir at a low speed for 5 minutes;

[0133] Step 4: Add the nano silicon carbide powder into the distilled water and stir at a medium speed for 10 minutes;

[0134] Step 5: Add a suspending agent to distilled water and stir at a medium speed for 15 minutes.

[0135] Step 6: Add ethylene glycol to distilled water and stir at a medium speed for 10 minutes.

[0136] Step 7: Complete the proportioning, package, and store in the warehouse.

[0137] For the MT12-core multimode fiber optic connector product, perform grinding. Place the prepared fiber optic grinding fluid on the grinding platform. Drive the MT12-core connector held by the grinding machine to move the fiber end face into contact with the fiber optic grinding fluid on the grinding platform, and drive the grinding platform to rotate.

[0138] During the grinding process, the grinding pressure is 5000 grams, the grinding speed is 180 r / s, and the grinding time is 110 s.

[0139] Comparative Example 1

[0140] Step 1: Weigh the following in parts by weight: 40 parts by weight of nano silicon carbide powder with a maximum particle size of 0.6 um, 30 parts by weight of distilled water, and 30 parts by weight of ethylene glycol, for later use.

[0141] Step 2: Add distilled water to the stirring bucket and stir at a low speed.

[0142] Step 3: Add nano silicon carbide powder to distilled water and stir at a medium speed for 10 minutes.

[0143] Step 4: Add ethylene glycol to distilled water and stir at a medium speed for 10 minutes.

[0144] Step 5: Complete the proportioning, package, and store in the warehouse.

[0145] For the MT12-core multimode fiber optic connector product, perform grinding. Place the prepared fiber optic grinding fluid on the grinding platform. Drive the MT12-core connector held by the grinding machine to move the fiber end face into contact with the fiber optic grinding fluid on the grinding platform, and drive the grinding platform to rotate.

[0146] During the grinding process, the grinding pressure is 5000 grams, the grinding speed is 180 r / s, and the grinding time is 120 s.

[0147] Comparative Example 2

[0148] Step 1: Weigh the following in parts by weight: 20 parts by weight of nano silicon carbide powder with a maximum particle size of 0.6 um, 60 parts by weight of distilled water, 20 parts by weight of ethylene glycol, 5% of the weight of distilled water of the dispersant with the model number 8605 of Guangzhou Runhong Chemical Co., Ltd., and 3‰ of the weight of distilled water of the defoamer with the model number KR-XP98 / 500ml, for later use.

[0149] Step 2: Add distilled water into the stirring tank and stir at a low speed;

[0150] Step 3: Add a dispersant into the distilled water and stir at a low speed for 5 minutes;

[0151] Step 4: Add nano-silicon carbide powder into the distilled water and stir at a medium speed for 10 minutes;

[0152] Step 5: Add ethylene glycol into the distilled water and stir at a medium speed for 10 minutes;

[0153] Step 6: Add a defoamer into the distilled water and stir at a medium speed for 10 minutes;

[0154] Step 7: After the proportioning is completed, package and store in the warehouse.

[0155] Grind the MT12 core multimode fiber optic connector product. Take the prepared fiber optic grinding liquid and place it on the grinding platform. Drive the MT12 core connector held by the grinding machine to move until the fiber end contacts the fiber optic grinding liquid on the grinding platform, and drive the grinding platform to rotate.

[0156] During the grinding process, the grinding pressure is 5000 grams, the grinding speed is 180 r / s, and the grinding time is 110 s.

[0157] Comparative Example 3

[0158] Step 1: Weigh the following in parts by weight: 30 parts by weight of nano-silicon carbide powder with a maximum particle size of 0.6 um, 60 parts by weight of distilled water, 20 parts by weight of ethylene glycol, 2% of the weight of distilled water of the dispersant with the model 8605 from Guangzhou Runhong Chemical Co., Ltd., and 2% of the weight of distilled water of the suspending agent. Set aside for use;

[0159] Step 2: Add distilled water into the stirring tank and stir at a low speed;

[0160] Step 3: Add a dispersant into the distilled water and stir at a low speed for 5 minutes;

[0161] Step 4: Add nano-silicon carbide powder into the distilled water and stir at a medium speed for 10 minutes;

[0162] Step 5: Add a suspending agent into the distilled water and stir at a medium speed for 15 minutes;

[0163] Step 6: Add ethylene glycol into the distilled water and stir at a medium speed for 10 minutes;

[0164] Step 7: After the proportioning is completed, package and store in the warehouse.

[0165] Grind the MT12 core multimode fiber optic connector product. Take the prepared fiber optic grinding liquid and place it on the grinding platform. Drive the MT12 core connector held by the grinding machine to move until the fiber end contacts the fiber optic grinding liquid on the grinding platform, and drive the grinding platform to rotate.

[0166] During the grinding process, the grinding pressure is 5000 grams, the grinding speed is 180 r / s, and the grinding time is 110 s.

[0167] Comparative Example 4

[0168] Step 1: Weigh the following in parts by weight: 30 parts by weight of nano silicon carbide powder with a maximum particle size of 0.6 um, 50 parts by weight of distilled water, 20 parts by weight of ethylene glycol, a dispersant of Model 8605 from Guangzhou Runhong Chemical Co., Ltd. is 3% of the weight of distilled water, a suspending agent of Model M-205 from Qingdao Wanjiahuixin Surface Materials Technology Co., Ltd. is 3% of the weight of distilled water, and a defoaming agent of Model KR-XP98 / 500ml is 2‰ of the weight of distilled water, and set aside for use;

[0169] Step 2: Add distilled water into the stirring barrel and stir at a low speed;

[0170] Step 3: Add the dispersant into the distilled water and stir at a low speed for 5 minutes;

[0171] Step 4: Add the nano silicon carbide powder into the distilled water and stir at a medium speed for 10 minutes;

[0172] Step 5: Add the suspending agent into the distilled water and stir at a medium speed for 15 minutes;

[0173] Step 6: Add ethylene glycol into the distilled water and stir at a medium speed for 10 minutes;

[0174] Step 7: Add the defoaming agent into the distilled water and stir at a medium speed for 10 minutes;

[0175] Step 8: After the proportioning is completed, package and store in the warehouse.

[0176] For the MT12-core multimode fiber optic connector product, perform grinding. Take the prepared fiber optic grinding fluid and place it on the grinding platform. Drive the MT12-core connector clamped by the grinding machine to move until the fiber end contacts the fiber optic grinding fluid on the grinding platform, and drive the grinding platform to rotate.

[0177] During the grinding process, the grinding pressure is 5000 grams, the grinding speed is 180 r / s, and the grinding time is 110 s.

[0178] Comparative Example 5

[0179] Compared with Example 6, replace the equal parts by weight of ethylene glycol with polyethylene glycol, and the rest are the same.

[0180] The ground optical fiber end faces obtained from the above Examples 1-7 and Comparative Examples 1-5 were subjected to 3D interference testing in accordance with the IEC industry standard. The brands of the interference testers included Dimension, DASI, or Sumix, and the test results are shown in Table 1. The fiber drawing liquid only affects the fiber height, maximum fiber height difference, core depression, and end face effect in the 3D interference value. Only these data items were collected for the experimental comparison data.

[0181]

[0182]

[0183] In Table 1, based on the experimental data and result analysis, the weight ratio of nano-silicon carbide powder, purified water, and diol monomer humectant is (2-4):(4-8):(1-3), the dispersant is 10%-30% of the weight of purified water, and the suspending agent is 5%-20% of the weight of purified water; the particle size range of the nano-silicon carbide powder is 0.3um ≤ α < 1um. The optical fiber drawing and grinding liquid obtained through this ratio can fully meet the industry specifications in terms of the end face and interference.

[0184] In the description of the specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0185] The above content is only an example and illustration of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the invention or exceed the scope defined by the claims of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. An optical fiber drawing and grinding liquid, characterized in that: It includes nano silicon carbide powder, purified water, hydrophilic dispersant, water-soluble suspending agent, and diol monomer humectant; Among them, the weight ratio of the nano silicon carbide powder, the purified water, and the diol monomer humectant is (2 - 4):(4 - 8):(1 - 3), the hydrophilic dispersant is 10% - 30% of the weight of the purified water, and the water-soluble suspending agent is 5% - 20% of the weight of the purified water; The particle size range of the nano silicon carbide powder is 0.3μm ≤ α < 1μm; Among them, the hydrophilic dispersant is dispersant model 8605 of Guangzhou Runhong Chemical Co., Ltd., the water-soluble suspending agent is suspending agent model M - 205 of Qingdao Wanjiahuixin Surface Materials Technology Co., Ltd., and the diol monomer humectant includes ethylene glycol; the moisture absorption and moisture retention ability of the optical fiber drawing grinding liquid is enhanced by the ethylene glycol to reduce the oxidation of the hydrophilic dispersant and the water-soluble suspending agent; The optical fiber drawing grinding liquid further includes a defoaming agent, and the defoaming agent is defoaming agent model KR - XP98 / 500ml of Jiangsu Kuorun Chemical Co., Ltd., so as to reduce the foam in the optical fiber drawing grinding liquid through the defoaming agent.

2. The optical fiber drawing and grinding liquid according to claim 1, wherein: The particle size range of the nano silicon carbide powder is 0.5μm ≤ α ≤ 0.8μm.

3. The method for preparing an optical fiber drawing and grinding liquid according to claim 1, characterized in that: It includes the following steps: Step 1: Weigh the following in parts by weight: 20 - 40 parts by weight of nano silicon carbide powder, 40 - 80 parts by weight of purified water, 10 - 30 parts by weight of diol monomer humectant, the hydrophilic dispersant is 10% - 30% of the weight of the purified water, the water-soluble suspending agent is 5% - 20% of the weight of the purified water, and the defoaming agent is 1‰ - 10‰ of the purified water, for later use; Step 2: Add the purified water into the stirring barrel and stir at a low speed; Step 3: Add the hydrophilic dispersant into the purified water and stir at a low speed for 3 - 8 minutes; Step 4: Add the nano silicon carbide powder into the purified water and stir at a medium speed for 8 - 12 minutes; Step 5: Add the water-soluble suspending agent into the purified water and stir at a medium speed for 12 - 18 minutes; Step 6: Add the diol monomer humectant into the purified water and stir at a medium speed for 8 - 12 minutes; Step 7: After the proportioning is completed, package and store in the warehouse; Among them: between Step 6 and Step 7, it further includes: adding the defoaming agent into the purified water and stirring at a medium speed for 8 - 12 minutes, so as to reduce the foam in the optical fiber drawing grinding liquid through the defoaming agent.

4. The method for preparing an optical fiber drawing and grinding liquid according to claim 3, wherein: In Step 3, the hydrophilic dispersant is stirred at a low speed for 5 minutes; In Step 4, the nano silicon carbide powder is stirred at a medium speed for 10 minutes; In Step 5, the water-soluble suspending agent is stirred at a medium speed for 15 minutes; In Step 6, the diol monomer humectant is stirred at a medium speed for 10 minutes; After Step 6, the defoaming agent is stirred at a medium speed for 10 minutes.

5. A fiber drawing and grinding process, characterized in that: Use the optical fiber drawing grinding liquid according to any one of claims 1 - 2 prepared by the preparation method according to any one of claims 3 - 4 to grind the drawn optical fiber; During the grinding process, the grinding pressure is 4000 - 6000 grams, the grinding speed is 160 - 200 r / s, and the grinding time is 100 - 120 s.

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