Optical Fiber Polishing and Grinding Liquid, Preparation Method Thereof, and Optical Fiber Polishing and Grinding Process

Abstract

The present invention relates to an optical fiber polishing and grinding liquid, a preparation method thereof, and an optical fiber polishing and grinding process, belonging to the technical field of optical fiber processing. The optical fiber polishing and grinding liquid comprises nano cerium oxide powder, purified water, a hydrophilic dispersant, a water-soluble suspending agent, and a diol monomer humectant; wherein, the weight ratio of the nano cerium oxide powder, the purified water, and the diol monomer humectant is (2-4):(4-8):(1-3), the dispersant is 3%-15% of the weight of the purified water, and the suspending agent is 5%-10% of the weight of the purified water; the particle size range of the nano cerium oxide powder is 0.2 μm ≤ α ≤ 0.7 μm. With this grinding liquid, good optical fiber polishing and grinding effects and good optical properties can be achieved. In addition, the particle size range of the nano cerium oxide powder is set to 0.2 μm ≤ α ≤ 0.7 μm, 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, so as 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 polishing and grinding fluid, a preparation method thereof, and an optical fiber polishing and grinding process. Background Art

[0002] Optical fiber communication is a communication method that uses optical fibers as transmission media and optical signals as information carriers. 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. An optical fiber line consists of optical fibers, optical fiber connectors, and optical fiber adapters. The function of the optical fiber line 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 at present. 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 are hard and brittle materials, the theoretical values of the elastic limit and strength limit of such materials are very close. During the machining 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 machining surface, affecting the surface quality and optical properties of the material. Therefore, it is difficult to control the machining 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 machining surface at the nanoscale and maintain good material properties. In this case, there are high requirements for the core polishing and grinding fluid formula in the MT connector machining process. After grinding with the existing polishing and grinding fluid, the fiber core is prone to depression, and there is a gap during the physical docking of the connectors, increasing the return loss of the product.

[0005] Therefore, it is necessary to provide an optical fiber polishing and grinding fluid, a preparation method thereof, and an optical fiber polishing 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 polishing and grinding fluid, a preparation method thereof, and an optical fiber polishing and grinding process to improve the polishing and 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 polishing and grinding fluid, comprising nano cerium oxide powder, purified water, a hydrophilic dispersant, a water-soluble suspending agent, and a diol monomer humectant;

[0008] Among them, the weight ratio of the nano cerium oxide powder, the purified water, and the diol monomer humectant is (2 - 4):(4 - 8):(1 - 3), the dispersant is 3% - 15% of the weight of the purified water, and the suspending agent is 5% - 10% of the weight of the purified water;

[0009] The particle size range of the nano cerium oxide powder is 0.2μm ≤ α ≤ 0.7μm.

[0010] In some embodiments, the particle size range of the nano cerium oxide powder is 0.3μm ≤ α ≤ 0.5μm.

[0011] In some embodiments, the dispersant includes a modified polyether phosphate compound containing a hydrophilic group.

[0012] In some embodiments, the dispersant is the dispersant with model number 8605 from Guangzhou Runhong Chemical Co., Ltd.

[0013] In some embodiments, the suspending agent includes a water-soluble liquid polymer, an emulsifier, and a water-soluble cellulose.

[0014] In some embodiments, it is characterized in that the diol monomer humectant includes ethylene glycol.

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

[0016] Step 1: Weigh according to the weight ratio as follows: 20 - 40 parts by weight of nano cerium oxide powder, 40 - 80 parts by weight of purified water, 10 - 30 parts by weight of diol monomer humectant, the dispersant is 3% - 15% of the weight of the purified water, and the suspending agent is 5% - 10% 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 cerium oxide 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 into the purified water and stir at a medium speed for 8 - 12 minutes;

[0022] Step 7: After the proportioning is completed, package and store in the warehouse.

[0023] In some embodiments, in the said Step 3, the dispersant is stirred at a low speed for 5 minutes.

[0024] In the said Step 4, the nano-ceria powder is stirred at a medium speed for 10 minutes.

[0025] In the said Step 5, the suspending agent is stirred at a medium speed for 15 minutes.

[0026] In the said Step 6, the diol monomer humectant is stirred at a medium speed for 10 minutes.

[0027] The third aspect of the present invention provides an optical fiber polishing and grinding process, using the above-mentioned preparation method to prepare the above-mentioned optical fiber polishing and grinding liquid to polish and grind the optical fiber.

[0028] During the grinding process, the grinding pressure is 2000 - 3000 grams, the grinding speed is 120 - 180 r / s, and the grinding time is 20 - 40 s.

[0029] In some embodiments, the grinding pressure is 2500 grams, the grinding speed is 150 r / s, and the grinding time is 30 s.

[0030] Advantages of the present invention:

[0031] In the solution of the present invention, when the particle size α of the nano-ceria powder is less than or equal to 0.7 μm, the particle size of the ceria powder is relatively small, which is beneficial to reducing the condensation degree of the nano-ceria powder and the impact force on the optical fiber end face, improving the polishing and grinding accuracy. In addition, when the particle size α of the nano-ceria powder is greater than or equal to 0.2 μm, the particle size of the nano-ceria powder is not too small, ensuring a certain polishing and grinding force and a relatively high grinding efficiency. When the nano-ceria powder is too small, it is easy to cause property changes, resulting in unpredictable reactions between other additives in the grinding liquid and the nano-ceria powder during the grinding process, affecting the grinding effect of the grinding liquid and increasing the research and development difficulty of the grinding liquid. In addition, too small particles affect the grinding rate, require a longer time, affect the production efficiency, and too small particles will increase the cost of the nano-ceria powder. And, when the nano-ceria powder is 0.2 μm ≤ α ≤ 0.7 μm, it can be provided by domestic manufacturers, reducing the cost.

[0032] The dispersant is beneficial to uniformly disperse the nano-ceria powder in the grinding fluid; the function of the suspending agent is to uniformly disperse the nano-ceria 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 making the nano-ceria particles uniformly dispersed 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 dispersion and suspension effects, resulting in the nano-ceria particles in the formulated polishing and grinding fluid aggregating to form large particles or having poor suspension, directly affecting the polishing and grinding effect and causing the fiber height to be too high. In this case, by configuring a diol monomer humectant, moisture evaporation can be prevented during fiber grinding, moisture can be absorbed and retained, and the oxidation of the dispersant and the suspending agent can be reduced and delayed, so that during the grinding process, the grinding fluid can maintain a good grinding effect.

[0033] In addition, the weight ratio of the nano-ceria powder to the diol monomer humectant is (2 - 4):(4 - 8), which is beneficial for the nano-ceria powder to have a higher concentration in water and achieve a good grinding effect on the optical fiber; the dispersant is 3% - 15% of the weight of the purified water, which is beneficial for dispersing the nano-ceria powder with a higher concentration, so as to better uniformly disperse the nano-ceria powder in the grinding fluid; the suspending agent is 5% - 10% of the weight of the purified water, which is beneficial for uniformly dispersing the nano-ceria 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-ceria particles in the grinding fluid and being uniformly dispersed in the grinding fluid; the weight ratio of the purified water to the diol monomer humectant is (4 - 8):(1 - 3), which is beneficial for the diol monomer humectant to have a larger content to better prevent moisture evaporation, thereby absorbing and retaining moisture, 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.

[0034] 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 polishing and grinding effect of the optical fiber, and thus having good optical properties. In addition, considering cost, the particle size range of the nano-ceria powder is set to 0.2μm ≤ α ≤ 0.7μm, 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 mode

[0035] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0036] In the prior art, the particle size of the cerium oxide powder used in the optical fiber polishing abrasive is 0.8 - 1.5 μm. During the grinding process, due to the relatively large particle size of the cerium oxide 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 large and uneven forces, resulting in easy depression of the fiber core after grinding and having gaps during the physical docking of the connector, increasing the return loss of the product.

[0037] Based on the above problems, the present invention provides an optical fiber polishing abrasive, which includes nano - cerium oxide powder, purified water, hydrophilic dispersant, water - soluble suspending agent, and diol monomer humectant; wherein, the weight ratio of nano - cerium oxide powder, purified water, and diol monomer humectant is (2 - 4):(4 - 8):(1 - 3), the dispersant is 3% - 15% of the weight of purified water, and the suspending agent is 5% - 10% of the weight of purified water; the particle size range of the nano - cerium oxide powder is 0.2μm ≤ α ≤ 0.7μm.

[0038] Among them, the particle size range of 0.2μm ≤ α ≤ 0.7μm for the nano - cerium oxide powder represents the particle size range of the maximum particle size of the nano - cerium oxide powder, and most of the particle sizes of the nano - cerium oxide powder are controlled to be 0.2μm ≤ α ≤ 0.7μm. For example, the particle sizes of more than 50% of the nano - cerium oxide powder are controlled to be 0.2μm ≤ α ≤ 0.7μm. Of course, according to the selection, it can also be 60% or 70% or more or other ratios that the particle sizes of the nano - cerium oxide powder are controlled to be 0.2μm ≤ α ≤ 0.7μm, and this other ratio is selected in the range greater than 50% to make most of the particle sizes of the nano - cerium oxide powder be controlled to be 0.2μm ≤ α ≤ 0.7μm. The particle size α of the nano - cerium oxide powder being less than or equal to 0.7μm can make the particle size of the cerium oxide powder smaller, which is conducive to reducing the agglomeration degree of the nano - cerium oxide powder and reducing the impact force on the optical fiber end face, improving the polishing and grinding accuracy. In addition, the particle size α of the nano - cerium oxide powder being greater than or equal to 0.2μm makes the particle size of the nano - cerium oxide powder not too small, ensuring a certain polishing and grinding force and making the grinding efficiency higher. When the particle size of the nano - cerium oxide powder is too small, property changes are likely to occur, resulting in unpredictable reactions between other additives in the abrasive and the nano - cerium oxide powder during the grinding process, affecting the grinding effect of the abrasive and increasing the development difficulty of the abrasive. In addition, too small particles affect the grinding rate, require a longer time, affect production efficiency, and too small particles will increase the cost of the nano - cerium oxide powder. And the nano - cerium oxide powder with 0.2μm ≤ α ≤ 0.7μm can be provided by domestic manufacturers, reducing costs.

[0039] The dispersant is conducive to uniformly dispersing the nano cerium oxide powder in the grinding fluid; the suspending agent functions to uniformly disperse the nano cerium oxide 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 making the nano cerium oxide particles uniformly dispersed in the grinding fluid; generally, the dispersant and the suspending agent are prone to oxidation. After oxidation, they will lose or reduce the original dispersion and suspension effects, resulting in the aggregation of nano cerium oxide particles in the prepared polishing grinding fluid to form large particles or poor suspension, directly affecting the polishing 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 keep humidity during the grinding of the optical fiber, 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.

[0040] In addition, the weight ratio of the nano cerium oxide powder to the diol monomer humectant is (2 - 4):(4 - 8), which is conducive to the nano cerium oxide powder having a higher concentration in water and achieving a good grinding effect on the optical fiber; the dispersant is 3% - 15% of the weight of the purified water, which is conducive to dispersing the nano cerium oxide powder with a higher concentration, so as to better uniformly disperse the nano cerium oxide powder in the grinding fluid; the suspending agent is 5% - 10% of the weight of the purified water, which is conducive to uniformly dispersing the nano cerium oxide 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 cerium oxide 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 keeping 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.

[0041] 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 cerium oxide powder in water and improve the grinding effect.

[0042] The hydrophilic dispersant is a modified polyether phosphate ester compound with a hydrophilic group, or other dispersants with a hydrophilic group, which is not limited here and can be set according to needs.

[0043] 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 here one by one. Among them, substances such as emulsifiers or dispersants can be added according to needs.

[0044] The diol monomer humectant includes at least one of monomolecular humectant diols such as ethylene glycol and propylene glycol, which is not limited here as long as it has the function of absorbing moisture and keeping humidity and reducing and delaying the oxidation of the dispersant and the suspending agent.

[0045] 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 good polishing and grinding effects of the optical fiber, and thus having good optical performance. In addition, considering cost, the particle size range of the nano-ceria powder is set as 0.2μm ≤ α ≤ 0.7μm, 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.

[0046] In some embodiments, the particle size range of the nano-ceria powder is 0.3μm ≤ α ≤ 0.5μm, which is beneficial to making the nano-ceria powder smaller and more uniform in size. The dispersant and the suspending agent can more easily act on the nano-ceria particles, enabling the nano-ceria particles to be more evenly distributed in water. During the grinding process, it further has a better optical fiber grinding effect and improves the optical performance of the optical fiber connector.

[0047] In some embodiments, the dispersant includes modified polyether phosphate ester compounds containing hydrophilic groups, such as the dispersant with model number 8605 from Guangzhou Runhong Chemical Co., Ltd. Using modified polyether phosphate ester compounds containing hydrophilic groups can have good dispersing power and adhesion. When the modified polyether phosphate ester compounds are dissolved in water, they adsorb and drive the nano-ceria particles to disperse in water, making the nano-ceria particles more evenly distributed in water. In addition, the modified polyether phosphate ester compounds have a certain moisturizing property, making the oxidation property of the modified polyether phosphate ester compounds lower, which is beneficial to the more persistent uniform dispersion of the nano-ceria particles.

[0048] In some embodiments, the suspending agent includes water-soluble liquid polymers, emulsifiers, water-soluble celluloses, etc., such as the suspending agent with model number M-205 from Qingdao Wanjiahuixin Surface Materials Technology Co., Ltd., to better combine with the nano-ceria particles, so as to better disperse the nano-ceria particles evenly in water and keep them in a suspended state without sinking rapidly, and the suspending effect is better.

[0049] 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 substances and modified polyether phosphate ester compounds in the suspending agent, has a stronger moisturizing effect on the suspending agent and the dispersant, and the formed grinding liquid can better enhance the dispersing effect of the dispersant and the suspending effect of the suspending agent, thereby further enhancing the uniform dispersion of the nano-ceria particles and improving the optical fiber grinding effect. Moreover, ethylene glycol is a neutral substance with weak corrosiveness to the human body, which is beneficial for the operation of the operator.

[0050] In some embodiments, the present invention also provides a method for preparing an optical fiber polishing and grinding liquid, including the following steps:

[0051] Step 1: Weigh 20 - 40 parts by weight of cerium oxide powder, 40 - 80 parts by weight of purified water, and 10 - 30 parts by weight of diol monomer humectant. The dispersant is 3% - 15% of purified water, and the suspending agent is 5% - 10% of purified water, and set aside; Step 2: Add purified water into the stirring barrel and stir at low speed; Step 3: Add the dispersant into the purified water and stir at low speed for 3 - 8 minutes; Step 4: Add nano - cerium oxide powder into the purified water and stir at medium speed for 8 - 12 minutes; Step 5: Add the suspending agent into the purified water and stir at medium speed for 12 - 18 minutes; Step 6: Add the diol monomer humectant into the purified water and stir at medium speed for 8 - 12 minutes; Step 7: After the proportioning is completed, package and store in the warehouse.

[0052] Among them, stirring the dispersant at low speed for 3 - 8 minutes is beneficial to the better dissolution of the dispersant in water; the dispersant dissolves in water prior to the nano - cerium oxide powder, which is beneficial for the dispersant to fully disperse the nano - cerium oxide evenly; the suspending agent is added to water after the nano - cerium oxide powder, which is beneficial for the suspending agent to have a good suspending effect on the dispersed nano - cerium oxide; and the diol monomer humectant is added to water after the suspending agent and the dispersant, which is beneficial to reduce and delay the oxidation of the suspending agent and the dispersant; stirring the nano - cerium oxide powder, the suspending agent, and the diol monomer humectant at medium speed in purified water is beneficial to accelerating the diffusion speed and facilitating the full mixing of various materials.

[0053] In some embodiments, in Step 3, the dispersant is stirred at low speed for 5 minutes; in Step 4, the nano - cerium oxide powder is stirred at medium speed for 10 minutes; in Step 5, the suspending agent is stirred at medium speed for 15 minutes; in Step 6, the diol monomer humectant is stirred at medium speed for 10 minutes.

[0054] In some embodiments, the present invention also provides an optical fiber polishing and grinding process, using the above - prepared optical fiber polishing and grinding liquid to polish and grind the optical fiber according to the above - mentioned preparation method; during the grinding process, the grinding pressure is 2000 - 3000 grams, the grinding speed is 120 - 180 r / s, and the grinding time is 20 - 40 s, which is beneficial to the good uniformity of nano - cerium oxide in the grinding liquid, thus having a good grinding and polishing effect on the optical fiber.

[0055] Among them, the grinding machine used during the grinding process is Shengming MT central pressure grinding machine, Hanxin MT central pressure grinding machine, or Boles MT central pressure grinding machine.

[0056] Preferably, the grinding pressure is 2500 grams, the grinding speed is 150 r / s, and the grinding time is 30 s to have a better grinding effect.

[0057] The following are examples of the preparation method of the optical fiber polishing and grinding liquid and the optical fiber polishing and grinding process, as follows:

[0058] Example 1

[0059] Step 1: Weigh the following components by weight: 20 parts by weight of nano-ceria powder with a maximum particle size of 0.2 μm, 40 parts by weight of distilled water, 10 parts by weight of ethylene glycol, 3% of the weight of distilled water of dispersant with the model number 8605 from Guangzhou Runhong Chemical Industry Co., Ltd., and 5% of the weight of distilled water of suspending agent with the model number M-205 from Qingdao Wanjiahuixin Surface Materials Technology Co., Ltd., and set aside for use;

[0060] Step 2: Add distilled water into the stirring bucket and stir at a low speed;

[0061] Step 3: Add the dispersant into the distilled water and stir at a low speed for 3 minutes;

[0062] Step 4: Add the nano-ceria powder into the distilled water and stir at a medium speed for 8 minutes;

[0063] Step 5: Add the suspending agent into the distilled water and stir at a medium speed for 12 minutes;

[0064] Step 6: Add ethylene glycol into the distilled water and stir at a medium speed for 8 minutes;

[0065] Step 7: After the proportioning is completed, package and store in the warehouse.

[0066] Polish and grind the MT12-core multimode fiber optic connector product. Take the configured MT fiber optic polishing and grinding liquid and place it on the grinding platform. Drive the MT connector clamped by the grinding machine to contact the MT fiber optic polishing and grinding liquid on the grinding platform, and drive the grinding platform to rotate.

[0067] During the grinding process, the grinding pressure is 2000 grams, the grinding speed is 120 r / s, and the grinding time is 20 s.

[0068] Example 2

[0069] Step 1: Weigh the following components by weight: 40 parts by weight of nano-ceria powder with a maximum particle size of 0.7 μm, 80 parts by weight of distilled water, 30 parts by weight of ethylene glycol, 15% of the weight of distilled water of dispersant with the model number 8605 from Guangzhou Runhong Chemical Industry Co., Ltd., and 10% of the weight of distilled water of suspending agent with the model number M-205 from Qingdao Wanjiahuixin Surface Materials Technology Co., Ltd., and set aside for use;

[0070] Step 2: Add distilled water into the stirring bucket and stir at a low speed;

[0071] Step 3: Add the dispersant into the distilled water and stir at a low speed for 8 minutes;

[0072] Step 4: Add the nano-ceria powder into the distilled water and stir at a medium speed for 12 minutes;

[0073] Step 5: Add the suspending agent into the distilled water and stir at a medium speed for 18 minutes;

[0074] Step 6: Add ethylene glycol to distilled water and stir at medium speed for 12 minutes;

[0075] Step 7: Complete the proportioning, package and store in the warehouse.

[0076] For the MT12-core multimode fiber optic connector product, perform polishing and grinding. Take the prepared MT fiber optic polishing and grinding fluid and place it on the grinding platform. Drive the MT connector clamped by the grinding machine to contact the fiber optic polishing and grinding fluid on the grinding platform, and drive the grinding platform to rotate.

[0077] During the grinding process, the grinding pressure is 3000 grams, the grinding speed is 180 r / s, and the grinding time is 40 s.

[0078] Example 3

[0079] Step 1: Weigh the following in parts by weight: 25 parts by weight of nano-ceria powder with a maximum particle size of 0.3 μm, 50 parts by weight of distilled water, 15 parts by weight of ethylene glycol, the dispersant with the model number 8605 from Guangzhou Runhong Chemical Co., Ltd. is 6% of the weight of distilled water, and the suspending agent with the model number M-205 from Qingdao Wanjiahuixin Surface Materials Technology Co., Ltd. is 6% of the weight of distilled water, for later use;

[0080] Step 2: Add distilled water to the stirring bucket and stir at low speed;

[0081] Step 3: Add the dispersant to distilled water and stir at low speed for 5 minutes;

[0082] Step 4: Add nano-ceria powder to distilled water and stir at medium speed for 10 minutes;

[0083] Step 5: Add the suspending agent to distilled water and stir at medium speed for 15 minutes;

[0084] Step 6: Add ethylene glycol to distilled water and stir at medium speed for 10 minutes;

[0085] Step 7: Complete the proportioning, package and store in the warehouse.

[0086] For the MT12-core multimode fiber optic connector product, perform polishing and grinding. Take the prepared MT fiber optic polishing and grinding fluid and place it on the grinding platform. Drive the MT connector clamped by the grinding machine to contact the fiber optic polishing and grinding fluid on the grinding platform, and drive the grinding platform to rotate.

[0087] During the grinding process, the grinding pressure is 2500 grams, the grinding speed is 150 r / s, and the grinding time is 30 s.

[0088] Example 4

[0089] Step 1: Weigh the following in parts by weight: 35 parts by weight of nano-ceria powder with a maximum particle size of 0.5 μm, 70 parts by weight of distilled water, 25 parts by weight of ethylene glycol, 12% of the weight of distilled water of the dispersant with model number 8605 from Guangzhou Runhong Chemical Co., Ltd., and 9% of the weight of distilled water of the suspending agent with model number M-205 from Qingdao Wanjiahuixin Surface Materials Technology Co., Ltd., and set aside for use;

[0090] Step 2: Add distilled water to the stirring barrel and stir at a low speed;

[0091] Step 3: Add the dispersant to the distilled water and stir at a low speed for 5 minutes;

[0092] Step 4: Add the nano-ceria powder to the distilled water and stir at a medium speed for 10 minutes;

[0093] Step 5: Add the suspending agent to the distilled water and stir at a medium speed for 15 minutes;

[0094] Step 6: Add ethylene glycol to the distilled water and stir at a medium speed for 10 minutes;

[0095] Step 7: After the proportioning is completed, package and store in the warehouse.

[0096] For the MT12-core multimode fiber optic connector product, perform polishing and grinding. Take the configured MT fiber optic polishing and grinding liquid and place it on the grinding platform. Drive the MT connector clamped by the grinding machine to contact the fiber optic polishing and grinding liquid on the grinding platform, and drive the grinding platform to rotate.

[0097] During the grinding process, the grinding pressure is 2500 grams, the grinding speed is 150 r / s, and the grinding time is 30 s.

[0098] Example 5

[0099] Step 1: Weigh the following in parts by weight: 30 parts by weight of nano-ceria powder with a maximum particle size of 0.4 μm, 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 model number 8605 from Guangzhou Runhong Chemical Co., Ltd., and 7% of the weight of distilled water of the suspending agent with model number M-205 from Qingdao Wanjiahuixin Surface Materials Technology Co., Ltd., and set aside for use;

[0100] Step 2: Add distilled water to the stirring barrel and stir at a low speed;

[0101] Step 3: Add the dispersant to the distilled water and stir at a low speed for 5 minutes;

[0102] Step 4: Add the nano-ceria powder to the distilled water and stir at a medium speed for 10 minutes;

[0103] Step 5: Add the suspending agent to the distilled water and stir at a medium speed for 15 minutes;

[0104] Step 6: Add ethylene glycol to distilled water and stir at medium speed for 10 minutes;

[0105] Step 7: Complete the formulation, package and store in the warehouse.

[0106] Perform polishing and grinding on the MT12-core multimode fiber optic connector product. Take the configured MT fiber optic polishing and grinding fluid and place it on the grinding platform. Drive the MT connector clamped by the grinding machine to contact the fiber optic polishing and grinding fluid on the grinding platform, and drive the grinding platform to rotate.

[0107] During the grinding process, the grinding pressure is 2500 grams, the grinding speed is 150 r / s, and the grinding time is 30 s.

[0108] Example 6

[0109] Step 1: Weigh the following by weight: 30 parts by weight of nano-ceria powder with a particle size of 0.4 μm, 60 parts by weight of distilled water, 20 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, and the suspending agent of model M-205 from Qingdao Wanjiahuixin Surface Materials Technology Co., Ltd. is 5% of the weight of distilled water, and set aside;

[0110] Step 2: Add distilled water to the stirring barrel and stir at low speed;

[0111] Step 3: Add the dispersant to distilled water and stir at low speed for 5 minutes;

[0112] Step 4: Add nano-ceria powder to distilled water and stir at medium speed for 10 minutes;

[0113] Step 5: Add the suspending agent to distilled water and stir at medium speed for 15 minutes;

[0114] Step 6: Add ethylene glycol to distilled water and stir at medium speed for 10 minutes;

[0115] Step 7: Complete the formulation, package and store in the warehouse.

[0116] Perform polishing and grinding on the MT12-core multimode fiber optic connector product. Take the configured MT fiber optic polishing and grinding fluid and place it on the grinding platform. Drive the MT connector clamped by the grinding machine to contact the fiber optic polishing and grinding fluid on the grinding platform, and drive the grinding platform to rotate.

[0117] During the grinding process, the grinding pressure is 2500 grams, the grinding speed is 150 r / s, and the grinding time is 30 s.

[0118] Example 7

[0119] Step 1: Weigh the following in parts by weight: 30 parts by weight of nano-ceria powder with a particle size of 0.4 μm, 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., and 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;

[0120] Step 2: Add the 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-ceria 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 the ethylene glycol into the distilled water and stir at a medium speed for 10 minutes;

[0125] Step 7: After the ratio is completed, package and store in the warehouse.

[0126] For the MT12-core multimode fiber optic connector product, perform polishing and grinding. Take the prepared MT fiber optic polishing and grinding liquid and place it on the grinding platform. Drive the MT connector clamped by the grinding machine to contact the fiber optic polishing and grinding liquid on the grinding platform, and drive the grinding platform to rotate.

[0127] During the grinding process, the grinding pressure is 2000 grams, the grinding speed is 120 r / s, and the grinding time is 20 s.

[0128] Comparative Example 1

[0129] Step 1: Weigh the following in parts by weight: 40 parts by weight of nano-ceria powder with a particle size of 0.4 μm, 30 parts by weight of distilled water, 30 parts by weight of ethylene glycol, and set aside for use;

[0130] Step 2: Add the distilled water into the stirring barrel and stir at a low speed;

[0131] Step 3: Add the nano-ceria powder into the distilled water and stir at a medium speed for 10 minutes;

[0132] Step 4: Add the ethylene glycol into the distilled water and stir at a medium speed for 10 minutes;

[0133] Step 5: After the ratio is completed, package and store in the warehouse.

[0134] For the MT12-core multimode fiber optic connector product, perform polishing and grinding. Take the prepared MT fiber optic polishing and grinding liquid and place it on the grinding platform. Drive the MT connector clamped by the grinding machine to contact the fiber optic polishing and grinding liquid on the grinding platform, and drive the grinding platform to rotate.

[0135] During the grinding process, the grinding pressure is 2500 grams, the grinding speed is 150 r / s, and the grinding time is 30 s.

[0136] Comparative Example 2

[0137] Step 1: Weigh the following in parts by weight: 20 parts by weight of nano-ceria powder with a particle size of 0.4 μm, 60 parts by weight of distilled water, 20 parts by weight of ethylene glycol, and the dispersant with the model number 8605 from Guangzhou Runhong Chemical Co., Ltd. is 5% of the weight of distilled water, and set aside for use;

[0138] Step 2: Add distilled water into the stirring barrel and stir at a low speed;

[0139] Step 3: Add the dispersant into the distilled water and stir at a low speed for 5 minutes;

[0140] Step 4: Add the nano-ceria powder into the distilled water and stir at a medium speed for 10 minutes;

[0141] Step 5: Add ethylene glycol into the distilled water and stir at a medium speed for 10 minutes;

[0142] Step 6: After the proportioning is completed, package and store in the warehouse.

[0143] For the MT12-core multimode fiber optic connector product, perform polishing and grinding. Take the configured MT fiber optic polishing and grinding liquid and place it on the grinding platform. Drive the MT connector clamped by the grinding machine to contact the MT fiber optic polishing and grinding liquid on the grinding platform, and drive the grinding platform to rotate.

[0144] During the grinding process, the grinding pressure is 2500 grams, the grinding speed is 150 r / s, and the grinding time is 30 s.

[0145] Comparative Example 3

[0146] Step 1: Weigh the following in parts by weight: 30 parts by weight of nano-ceria powder with a particle size of 0.4 μm, 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 2% of the weight of distilled water, and the suspending agent with the model number M-205 from Qingdao Wanjiahuixin Surface Materials Technology Co., Ltd. is 2% of the weight of distilled water, and set aside for use;

[0147] Step 2: Add distilled water into the stirring barrel and stir at a low speed;

[0148] Step 3: Add the dispersant into the distilled water and stir at a low speed for 5 minutes;

[0149] Step 4: Add the nano-ceria powder into the distilled water and stir at a medium speed for 10 minutes;

[0150] Step 5: Add the suspending agent into the distilled water and stir at a medium speed for 15 minutes;

[0151] Step 6: Add ethylene glycol to distilled water and stir at a medium speed for 10 minutes;

[0152] Step 7: After the proportioning is completed, package and store in the warehouse.

[0153] For the MT12-core multimode fiber optic connector product, perform polishing and grinding. Take the prepared MT fiber polishing and grinding liquid and place it on the grinding platform. Drive the MT connector clamped by the grinding machine to contact the fiber polishing and grinding liquid on the grinding platform, and drive the grinding platform to rotate.

[0154] During the grinding process, the grinding pressure is 2500 grams, the grinding speed is 150 r / s, and the grinding time is 40 s.

[0155] Comparative Example 4

[0156] Step 1: Weigh the following in parts by weight: 30 parts by weight of nano-ceria powder with a particle size of 0.4 μm, 50 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 3% of the weight of distilled water, and the suspending agent with the model number M-205 from Qingdao Wanjiahuixin Surface Material Technology Co., Ltd. is 3% of the weight of distilled water, and set aside;

[0157] Step 2: Add distilled water to the stirring bucket and stir at a low speed;

[0158] Step 3: Add the dispersant to distilled water and stir at a low speed for 5 minutes;

[0159] Step 4: Add nano-ceria powder to distilled water and stir at a medium speed for 10 minutes;

[0160] Step 5: Add the suspending agent to distilled water and stir at a medium speed for 15 minutes;

[0161] Step 6: Add ethylene glycol to distilled water and stir at a medium speed for 10 minutes;

[0162] Step 7: After the proportioning is completed, package and store in the warehouse.

[0163] For the MT12-core multimode fiber optic connector product, perform polishing and grinding. Take the prepared MT fiber polishing and grinding liquid and place it on the grinding platform. Drive the MT connector clamped by the grinding machine to contact the fiber polishing and grinding liquid on the grinding platform, and drive the grinding platform to rotate.

[0164] During the grinding process, the grinding pressure is 2500 grams, the grinding speed is 150 r / s, and the grinding time is 40 s.

[0165] Comparative Example 5

[0166] Compared with Example 6, replace the equal parts by weight of ethylene glycol with polyethylene glycol, and the rest are the same.

[0167] The polished 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, Daisi, and Sumix. The test results are shown in Table 1. The polishing liquid only affects the core depression and the end face effect in the 3D interference value. The experimental comparison data only collected two items of data, namely the core depression and the end face effect.

[0168]

[0169] In Table 1, based on the experimental data and result analysis, the weight ratio of nano-ceria powder, purified water, and diol monomer humectant is (2-4):(4-8):(1-3), the dispersant is 3%-15% of the weight of purified water, and the suspending agent is 5%-10% of the weight of purified water; the particle size range of nano-ceria powder is 0.2μm ≤ α ≤ 0.7μm. The optical fiber polishing and grinding liquid obtained by this ratio can fully meet the industry specifications in terms of the end face and interference.

[0170] In the description of the specification, the description referring to terms such as "an 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 representations of the above terms do 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.

[0171] The above content is only an example and explanation 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 fall within the protection scope of the present invention.

Claims

1. An optical fiber polishing and grinding liquid, characterized in that: It is composed of nano-cerium oxide powder, purified water, hydrophilic dispersant, water-soluble suspending agent and diol monomer humectant; Among them, the weight ratio of the nano-cerium oxide powder, the purified water, and the diol monomer humectant is (2-4):(4-8):(1-3), the hydrophilic dispersant is 3%-15% of the weight of the purified water, and the water-soluble suspending agent is 5%-10% of the weight of the purified water; The particle size range of the nano-cerium oxide powder is 0.2μm ≤ α ≤ 0.3μm; The water-soluble suspending agent includes water-soluble liquid polymer, emulsifier and water-soluble cellulose; The hydrophilic dispersant includes modified polyether phosphate ester compounds containing hydrophilic groups; The diol monomer humectant includes ethylene glycol.

2. The optical fiber polishing and grinding liquid according to claim 1, wherein: The hydrophilic dispersant is the dispersant with model number 8605 produced by Guangzhou Runhong Chemical Co., Ltd.

3. A method for preparing an optical fiber polishing and grinding liquid, which is used to prepare the optical fiber polishing and grinding liquid described in any one of claims 1-2, and is characterized in that: It includes the following steps: Step 1: Weigh according to the weight ratio as follows: 20-40 parts by weight of nano-cerium oxide powder, 40-80 parts by weight of purified water, 10-30 parts by weight of diol monomer humectant, the hydrophilic dispersant is 3%-15% of the weight of the purified water, and the water-soluble suspending agent is 5%-10% of the weight of the purified water, for later use; Step 2: Add the purified water into the stirring tank 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-cerium oxide 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.

4. The method for preparing the optical fiber polishing 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-cerium oxide 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.

5. An optical fiber polishing and grinding process, characterized in that: Polish and grind the optical fiber with the optical fiber polishing and grinding liquid prepared by the preparation method according to any one of Claims 3-4; During the grinding process, the grinding speed is 120-180 r / s, and the grinding time is 20-40 s.

6. The optical fiber polishing and grinding process according to claim 5, wherein: The grinding speed is 150 r / s, and the grinding time is 30 s.

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