Novel silicone hydrogel contact lens and preparation method thereof

Abstract

The present invention provides a novel silicone hydrogel contact lens and a preparation method thereof, and relates to the technical field of contact lenses, the novel silicone hydrogel contact lens comprises a material A, a material B, a material C, a cross-linking agent, an initiator and an ultraviolet light absorber according to a target weight part ratio of (10-35): (1-10): (40-80): (0.1-0.5): (0.3-0.8): (0.5-1.8), and the material C is two or more hydrophilic monomers, so that the silicone hydrogel contact lens prepared by the invention has better surface hydrophilicity, smoothness and wearing comfort.

Description

Technical Field

[0001] The invention relates to the technical field of contact lenses, in particular to a novel silicone hydrogel contact lens and a preparation method thereof. Background Art

[0002] An important indicator of contact lenses is the user's wearing comfort. In this regard, silicone hydrogel lenses have their unique advantages: soft, breathable, and comfortable. They are bound to be the way forward for the development of the industry. However, silicone hydrogel products still have certain shortcomings in the current technical level. If the existing molds are used to prepare silicone hydrogel lenses, there will be obvious stickiness, sticking and adsorption problems. It is difficult to separate the mold from the silicone hydrogel lens, and it is easy to cause a decrease in wearing comfort. In addition, mechanical methods, such as extruding the bottom of the plastic positive mold or the negative mold to separate the silicone hydrogel lens from the mold, are likely to cause wear to the silicone hydrogel lens. Summary of the invention

[0003] The present invention provides a novel silicone hydrogel contact lens and a preparation method thereof, which are used to solve at least one of the following technical problems: obvious stickiness, sticking and adsorption problems will occur when silicone hydrogel lenses are prepared using existing molds; it is difficult to separate the mold from the silicone hydrogel lens, which may easily lead to a decrease in wearing comfort; and mechanical methods such as squeezing the bottom of a plastic male mold or female mold to separate the silicone hydrogel lens from the mold may easily cause wear to the silicone hydrogel lens.

[0004] In order to solve the above technical problems, the present invention discloses a novel silicone hydrogel contact lens, comprising target weight portions of material A, material B, material C, a crosslinking agent, an initiator and an ultraviolet absorber, and the weight proportions of material A, material B, material C, the crosslinking agent, the initiator and the ultraviolet absorber are: 10-35: 1-10: 40-80: 0.1-0.5: 0.3-0.8: 0.5-1.8.

[0005] Preferably, material A is a siloxane monomer substance, and the general formula of material A is:

[0006] Where R1 is H or CH3; R2 is C 2～3 An alkyl group or an alkyl group containing one -OH substituent group; R3, R4 and R5 are

[0007] Preferably, material B is a siloxane polymerization cross-linking agent, and the general formula of the siloxane polymerization cross-linking agent is: Wherein R1 is CH2-CH2 or C3H6, R2 is a polyethylene glycol group with a molecular weight of less than 2000, R3 is an aliphatic diisocyanate group, and R4 is a polydimethylsiloxane group with a molecular weight of less than 4000.

[0008] Preferably, material C is two or more hydrophilic monomers, one of which is N-methyl-N-vinylacetamide, and the other hydrophilic monomers are any one or more combinations of N-vinylpyrrolidone and N,N-dimethylacrylamide.

[0009] Preferably, the crosslinking agent is ethylene glycol dimethacrylate, the initiator is azobisisobutyronitrile, and the ultraviolet absorber is 2-(4-benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate.

[0010] Preferably, the method comprises the following steps:

[0011] Step 1: uniformly mix target weight portions of material A, material B, material C, a crosslinking agent, an initiator and a UV absorber, and then filter the mixture using a microporous filter membrane, add the filtrate into the cavity of the lower mold and close the mold;

[0012] Step 2: The molded filtrate is polymerized and cured under the initiator conditions to form the lens;

[0013] Step 3: Using a separation device to separate the lower mold from the lens;

[0014] Step 4: Wash the separated lenses with an alcohol-water mixture, then place them in a saline buffer, sterilize, and package.

[0015] Preferably, a plurality of lower molds are evenly distributed on the lower substrate, a mold cavity is provided at the upper end of the lower mold, the lower end of the lower substrate is fixedly connected to the sealing shell, a sealing cavity is provided inside the sealing shell, an upper substrate is correspondingly provided on the upper side of the lower substrate, a plurality of upper molds are evenly distributed at the lower end of the upper substrate, and the plurality of upper molds and the plurality of lower molds are arranged in one-to-one correspondence.

[0016] Preferably, the separation device includes a base shell, a working chamber is provided inside the base shell, a lower base plate is provided on the upper side of the working chamber, a sealing plate is slidably provided in the sealing chamber, the lower end of the sealing plate is fixedly connected to the pushing block 1, the pushing block 1 passes through the lower end of the sealing chamber and is communicated with the outside, the inclined end of the pushing block 1 is slidably connected to the pushing block 2, the pushing block 2 is fixedly connected to the sliding sleeve, a guide ball is provided in the internal through hole of the sliding sleeve, the guide ball is slidably connected to the arc groove section on the movable rod, the movable rod is fixedly connected to the left end of the working chamber, a telescopic spring rod is fixedly provided between the sliding sleeve and the sealing shell, the right end of the sealing shell is fixedly connected to the driving rod, the driving rod passes through the right end of the working chamber and is fixedly connected to the motor, and the motor The machine is fixedly connected to the base shell through a mounting plate 1, the movable rod is rotatably connected to the guide sleeve and the left end of the sealing shell, the guide sleeve is rotatably connected to a groove 2 at the left end of the working chamber, and a torsion spring 1 is fixedly arranged between the guide sleeve and the groove 2, the inclined end of the guide sleeve is slidably connected to a push block 3, the push block 3 is fixedly connected to the sliding sleeve, a torsion spring set is arranged on the movable rod, the guide sleeve is fixedly connected to the fixed block, the fixed block is in corresponding contact with the guide rod, the guide rod is rotatably connected to the mounting seat at the lower end of the lower base plate, and a torsion spring 2 is arranged between the guide rod and the mounting seat, the guide rod is in corresponding contact with the push rod, the push rod is fixedly connected to the left end of the working chamber through a mounting block 2, and the mounting block 2 is distributed on the lower side of the guide sleeve.

[0017] Preferably, an air outlet is provided at the lower end of the mold cavity, a blocking block 1 is slidably provided in the air outlet, air vents are symmetrically provided at the left and right ends of the air outlet, the air vent is connected to the cavity, a blocking block 2 is slidably provided in the air outlet, the blocking block 2 is fixedly connected to the sliding plate, the blocking block 1 is fixedly connected to the connecting block 1, the connecting block 1 passes through the lower end of the air outlet and the upper end of the cavity into the cavity and is fixedly connected to the sliding plate, the cavity is arranged in the lower base plate, the sliding plate is slidably connected to the cavity, a plurality of springs 3 are fixedly provided between the sliding plate and the cavity, and the sliding plate Limit blocks are correspondingly provided on the left and right sides of the lower end, grooves 1 are symmetrically provided on the left and right sides of the cavity, a plurality of springs 1 are fixedly provided between the limit blocks and the grooves 1, the inclined ends of the limit blocks are in corresponding contact with the contact blocks on the lower side, the contact blocks on the lower side are fixedly connected to the contact blocks on the upper side through connecting blocks 2, connecting blocks 2 are symmetrically provided on the left and right sides of the sliding plate, a plurality of springs 2 are fixedly provided between the contact blocks on the lower side and the connecting blocks 2, the springs 2 are sleeved on the connecting blocks 2, the cavity is connected with the air supply channel, and the air supply channel is connected with the sealing cavity.

[0018] Preferably, the driving rod is connected to a cleaning mechanism, the cleaning mechanism includes a bevel gear 1 fixedly connected to the driving rod, the bevel gear 1 meshes with the bevel gear 2, the bevel gear 2 is fixedly connected to the threaded rod, the threaded rod is threadedly connected to the threaded sleeve, the threaded sleeve is slidably connected to the right end of the base shell, the threaded rod is fixedly connected to the right end of the base shell through the mounting plate 2, the threaded sleeve is fixedly connected to the connecting block 3, the connecting block 3 is slidably connected to the sliding cavity at the right end of the base shell, the connecting block 3 is fixedly connected to the connecting plate 1 through the connecting block 4, the upper end of the connecting plate 1 is symmetrically provided with connecting frames on both sides, the connecting frame passes through the lower end of the cleaning shell and enters the cleaning cavity, the upper end of the connecting frame is slidably provided with a plurality of support rods, and support inclined blocks are correspondingly provided between adjacent support rods, the support inclined blocks are fixedly connected to the side ends of the cleaning cavity through the mounting block 1, the internal through holes of the connecting frame are correspondingly provided with support inclined blocks, and spring rods are fixedly provided between adjacent support rods.

[0019] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 is a process flow chart of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the separation device of the present invention;

[0023] Figure 3 It is a schematic diagram of the connection structure of the cleaning shell of the present invention;

[0024] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of region A;

[0025] Figure 5 for Figure 2 A schematic diagram of the enlarged structure of the B region;

[0026] Figure 6 The side view of the base shell structure of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 7 The side view structure of the base shell of the present invention is shown in FIG. Figure 2 .

[0028] In the figure: 1, base shell; 2, cleaning shell; 3, cleaning chamber; 4, support rod; 5, connecting plate 1; 6, connecting frame; 7, mounting block 1; 8, supporting tilting block; 9, connecting block 4; 10, connecting block 3; 11, sliding chamber; 12, mounting plate 2; 13, threaded sleeve; 14, threaded rod; 15, bevel gear 2; 16, bevel gear 1; 17, motor; 18, driving rod; 19, mounting plate 1; 20, sliding sleeve; 21, push block 2; 22, push block 1; 23, sealing shell; 24, lower base plate; 25, lower mold; 26, sealing chamber; 27, sealing plate; 28, guide ball; 29, extension 30. compression spring rod; 30. mounting block 2; 31. upper mold; 32. upper substrate; 33. mold cavity; 34. air supply channel; 35. torsion spring 1; 36. push rod; 37. spring rod; 38. cavity; 39. blocking block 1; 40. connecting block 1; 41. air outlet; 42. air vent; 43. blocking block 2; 44. spring 3; 45. sliding plate; 46. contact block; 47. connecting block 2; 48. spring 2; 49. limit block; 50. spring 1; 51. groove 1; 52. guide rod; 53. fixed block; 54. torsion spring 2; 55. guide sleeve; 56. movable rod; 57. push block 3. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0030] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention provides the following embodiments

[0032] Example 1

[0033] The embodiment of the present invention provides a novel silicone hydrogel contact lens, comprising target weight portions of material A, material B, material C, a crosslinking agent, an initiator, and an ultraviolet absorber, and the weight portion ratio of material A, material B, material C, the crosslinking agent, the initiator, and the ultraviolet absorber is: 10-35: 1-10: 40-80: 0.1-0.5: 0.3-0.8: 0.5-1.8;

[0034] Material A is a siloxane monomer substance, and the general formula of material A is:

[0035] Where R1 is H or CH3; R2 is C 2～3 An alkyl group or an alkyl group containing one -OH substituent group; R3, R4 and R5 are

[0036] Material B is a siloxane polymerization cross-linking agent, and the general formula of the siloxane polymerization cross-linking agent is:

[0037] Wherein R1 is CH2-CH2 or C3H6, R2 is a polyethylene glycol group with a molecular weight of less than 2000, R3 is an aliphatic diisocyanate group, and R4 is a polydimethylsiloxane group with a molecular weight of less than 4000;

[0038] Material C is two or more hydrophilic monomers, one of which is N-methyl-N-vinyl acetamide, and the other hydrophilic monomers are any one or more combinations of N-vinyl pyrrolidone and N,N-dimethylacrylamide;

[0039] The crosslinking agent is ethylene glycol dimethacrylate, the initiator is azobisisobutyronitrile, and the ultraviolet absorber is 2-(4-benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate.

[0040] The beneficial effects of the above technical solution are:

[0041] The fatty diisocyanate group is isophorone diisocyanate group, the siloxane monomer material is methacryloxypropyl tris(trimethylsiloxane)silane, the weight ratio of polyethylene glycol group to polydimethylsiloxane group in the siloxane polymerization cross-linking agent is 0.3-0.6:1, the optimal number average molecular weight of the siloxane polymerization cross-linking agent is 3000-6000, and the material C is two or more hydrophilic monomers, which can make the silicone hydrogel contact lens prepared by the present invention have better surface hydrophilicity, smoothness and wearing comfort, reduce the adhesion between the silicone hydrogel contact lens and the mold, and solve the above-mentioned problems of obvious stickiness, sticking and adsorption when using the existing mold to prepare the silicone hydrogel lens, and it is difficult to separate the mold from the silicone hydrogel lens, which is also easy to cause the technical problem of reduced wearing comfort.

[0042] Example 2

[0043] A novel method for preparing silicone hydrogel contact lenses, such as Figure 1 As shown, the following steps are included:

[0044] Step 1: uniformly mix target weight portions of material A, material B, material C, a cross-linking agent, an initiator and a UV absorber, and then filter the mixture using a microporous filter membrane. Add the filtrate into the mold cavity 33 of the lower mold 25 and close the mold.

[0045] Step 2: The molded filtrate is polymerized and cured under the initiator conditions to form the lens;

[0046] Step 3: Using a separation device to separate the lower mold 25 from the lens;

[0047] Step 4: Wash the separated lenses with an alcohol-water mixture, then place them in a saline buffer, sterilize, and package.

[0048] The beneficial effects of the above technical solution are:

[0049] The pore size of the microporous filter membrane in step 1 is less than or equal to 0.45 μm, the alcohol-water mixture in step 4 adopts an ethanol / water solution with a concentration of 50% to 90%, and the specific polymerization curing method in step 2 is: putting the lower mold 25 after mold closing into a nitrogen oven, heating it to 40° C. under nitrogen flow, and keeping it warm for 30 minutes; then, heating it to 80° C. at a uniform speed within 5 minutes, keeping it warm for 1 hour, then heating it to 105° C., keeping it warm for 3 hours, and finally, cooling it naturally to room temperature. The separation device in step 3 separates the novel silicone hydrogel contact lens prepared by the present invention from the mold by blowing with pressurized gas, avoiding wear on the novel silicone hydrogel contact lens during the separation process, and solving the technical problem that the silicone hydrogel lens is easily worn when the silicone hydrogel lens is separated from the mold by mechanical methods, such as extruding the bottom of the plastic male mold or female mold.

[0050] Example 3

[0051] On the basis of Example 2, Figure 2-Figure 7 As shown, a plurality of lower molds 25 are evenly distributed on the lower base plate 24, a mold cavity 33 is provided at the upper end of the lower mold 25, the lower end of the lower base plate 24 is fixedly connected to the sealing shell 23, a sealing cavity 26 is provided inside the sealing shell 23, an upper base plate 32 is correspondingly provided on the upper side of the lower base plate 24, a plurality of upper molds 31 are evenly distributed at the lower end of the upper base plate 32, and the plurality of upper molds 31 and the plurality of lower molds 25 are provided one by one;

[0052] The separation device includes a base shell 1, a working chamber is provided inside the base shell 1, a lower base plate 24 is provided on the upper side of the working chamber, a sealing plate 27 is slidably provided in the sealing chamber 26, the lower end of the sealing plate 27 is fixedly connected to the pushing block 1 22, the pushing block 1 22 passes through the lower end of the sealing chamber 26 and is communicated with the outside, the inclined end of the pushing block 1 22 is slidably connected to the pushing block 21, the pushing block 21 is fixedly connected to the sliding sleeve 20, a guide ball 28 is provided in the internal through hole of the sliding sleeve 20, the guide ball 28 is slidably connected to the arc groove section on the movable rod 56, the movable rod 56 is fixedly connected to the left end of the working chamber, a telescopic spring rod 29 is fixedly provided between the sliding sleeve 20 and the sealing shell 23, the right end of the sealing shell 23 is fixedly connected to the driving rod 18, the driving rod 18 passes through the right end of the working chamber and is fixedly connected to the motor 17, and the motor 17 is installed The mounting plate 19 is fixedly connected to the base shell 1, the movable rod 56 is rotatably connected to the guide sleeve 55 and the left end of the sealing shell 23, the guide sleeve 55 is rotatably connected to the groove 2 at the left end of the working chamber, and a torsion spring 1 35 is fixedly provided between the guide sleeve 55 and the groove 2, the inclined end of the guide sleeve 55 is slidably connected to the push block 3 57, the push block 3 57 is fixedly connected to the sliding sleeve 20, the torsion spring 1 35 is sleeved on the movable rod 56, the guide sleeve 55 is fixedly connected to the fixed block 53, the fixed block 53 is in corresponding contact with the guide rod 52, the guide rod 52 is rotatably connected to the mounting seat at the lower end of the lower base plate 24, and a torsion spring 2 54 is provided between the guide rod 52 and the mounting seat, the guide rod 52 is in corresponding contact with the push rod 36, the push rod 36 is fixedly connected to the left end of the working chamber through the mounting block 2 30, and the mounting block 2 30 is distributed on the lower side of the guide sleeve 55.

[0053] The beneficial effects of the above technical solution are:

[0054] After the mold cavity 33 of the lower mold 25 and the upper mold 31 are matched, the mold closing step is completed. The arrangement of the lower substrate 24 and the upper substrate 32 can prepare multiple new silicone hydrogel contact lenses at the same time. A heater can be placed in the lower substrate 24 to make the temperature in the mold cavity 33 reach the target temperature. After the mold is closed, a ventilation hood is installed at the upper end of the base shell 1, and nitrogen is introduced into the working cavity through the ventilation hood, which reduces the process of transferring the mold and makes the mold cavity 33 also in a nitrogen environment. When the lower mold 25 is separated from the new silicone hydrogel contact lens of the present invention, after the upper mold 31 is separated from the mold cavity 33, the motor 17 is started, and the motor 17 drives the driving rod 18 to rotate, and the driving rod 18 drives The dynamic sealing shell 23 rotates, and the sealing shell 23 drives the lower base plate 24 and the telescopic spring rod 29 to rotate around the driving rod 18. The movable rod 56 and the driving rod 18 are coaxially arranged, and the telescopic spring rod 29 drives the sliding sleeve 20 to rotate. In this process, since the movable rod 56 remains fixed, and a limit spring is arranged between the arc groove section on the movable rod 56 and the smooth section of the movable rod 56, the arc groove section on the movable rod 56 remains stationary when the sliding sleeve 20 rotates. Therefore, the guide ball 28 in the sliding sleeve 20 slides along the arc groove section on the movable rod 56, and the sliding sleeve 20 drives the push block 21 to move, the telescopic spring rod 29 is compressed, and the push block 21 pushes the push block 1 22 toward the sealing chamber 2 6 moves, the push block 1 22 drives the sealing plate 27 to slide along the sealing cavity 26 until the lower base plate 24 rotates 180 degrees, so that the mold cavity 33 is vertically downward. During the rotation of the lower base plate 24, the guide rod 52 is driven to rotate, the guide rod 52 drives the fixed block 53 to rotate, the fixed block 53 drives the guide sleeve 55 to rotate, and the torsion spring 1 35 is deformed. During this process, the sliding sleeve 20, the push block 21, the push block 3 57 and the guide sleeve 55 rotate synchronously. The guide sleeve 55 is provided with an opening for the movable rod 56 to pass through. After the lower base plate 24 rotates 180 degrees, the push rod 36 just pushes the guide rod 52 to a tilted state, and causes the fixed block 53 to be out of contact with the guide rod 52. 5, the guide sleeve 55 returns to its original position under the elastic action of the guide sleeve 55. In the process of the guide sleeve 55 returning to its original position, the push block 3 57 will continue to move, and the push block 3 57 will push the sliding sleeve 20 to move. The sliding sleeve 20 drives the arc groove section on the movable rod 56 to move along the length direction of the movable rod 56, and the limit spring is deformed. The sliding sleeve 20 drives the push block 1 22 to continue to move toward the sealing chamber 26. When the motor 17 works in the reverse direction, it drives the driving rod 18 to rotate in the reverse direction. Under the elastic action of the telescopic spring rod 29 and the limit spring, the sliding sleeve 20 can be restored to its original position, and the arc groove and the push block 2 21 on the movable rod 56 will also return to their original positions with the movement of the sliding sleeve 20, and finally the sealing plate 27 is restored to its original position.

[0055] Example 4

[0056] On the basis of Example 3, Figure 2-Figure 7As shown, the lower end of the mold cavity 33 is provided with an air outlet 41, a block 39 is slidably provided in the air outlet 41, and vent holes 42 are symmetrically provided at the left and right ends of the air outlet 41, the vent hole 42 is connected with the cavity 38, a block 43 is slidably provided in the vent hole 42, the block 43 is fixedly connected to the sliding plate 45, the block 39 is fixedly connected to the connecting block 40, the connecting block 40 passes through the lower end of the air outlet 41 and the upper end of the cavity 38 to enter the cavity 38 and is fixedly connected to the sliding plate 45, the cavity 38 is arranged in the lower base plate 24, the sliding plate 45 is slidably connected to the cavity 38, and a plurality of springs 44 are fixedly provided between the sliding plate 45 and the cavity 38, and the sliding plate 45 is fixedly connected to the cavity 38. Limit blocks 49 are correspondingly provided on the left and right sides of the lower end of the movable plate 45, and grooves 51 are symmetrically provided on the left and right sides of the cavity 38. A plurality of springs 50 are fixedly provided between the limit blocks 49 and the grooves 51. The inclined end of the limit block 49 contacts with the contact block 46 on the lower side, and the contact block 46 on the lower side is fixedly connected to the contact block 46 on the upper side through a connecting block 47. Connecting blocks 47 are symmetrically provided on the left and right sides of the sliding plate 45, and a plurality of springs 48 are fixedly provided between the contact block 46 on the lower side and the connecting block 47. The springs 48 are sleeved on the connecting blocks 47. The cavity 38 is connected with the air supply channel 34, and the air supply channel 34 is connected with the sealing chamber 26.

[0057] The beneficial effects of the above technical solution are:

[0058] When the sealing plate 27 slides along the sealing cavity 26, the air in the sealing cavity 26 can be pushed into the air supply channel 34, and then into the cavity 38 through the air supply channel 34. The pressurized gas first pushes the connecting block 2 47 to slide along the sliding plate 45 through the upper contact block 46. The connecting block 2 47 drives the lower contact block 46 to move, and the spring 2 48 is deformed. The arrangement of the contact blocks 46 on the upper and lower sides makes it impossible for the connecting block 2 47 to separate from the sliding plate 45. When the lower contact block 46 moves, it pushes the limit block 49 to move toward the groove 1 51, and the spring 1 50 is deformed. At this time, the limit block 49 contacts the inclined end of the sliding plate 45 and no longer limits the sliding plate 45. At this time, the pressurized gas will push the sliding plate 45 to slide along the cavity 38, and the inclined end of the sliding plate 45 can push the limit block 49 to move toward the groove 1 51. The spring 3 44 is stretched, and the sliding plate 45 drives the blocking block 2 43 and the blocking block 1 39 to move until The second blocking block 43 no longer blocks the vent 42. At this time, the first blocking block 39 moves to the lower end of the outlet hole 41 and no longer blocks the connection between the vent 42 and the outlet hole 41. At the same time, the lower substrate 24 just rotates to 180 degrees, and the pushing block 37 starts to push the sliding sleeve 20 to move. The air entering the cavity 38 again passes through the vent 42 and the outlet hole 41, and finally enters the mold cavity 33, blowing the new silicone hydrogel contact lens to separate from the mold cavity 33, avoiding blowing the new silicone hydrogel contact lens away from the mold cavity 33 before the lower substrate 24 rotates to 180 degrees, making it difficult to control the position where the new silicone hydrogel contact lens falls out, and using pressurized gas to blow the new silicone hydrogel contact lens away from the mold cavity 33, avoiding using a mechanical method to separate the new silicone hydrogel contact lens from the mold cavity 33, which is easy to cause wear of the new silicone hydrogel contact lens.

[0059] Example 5

[0060] On the basis of Example 3, Figure 2-Figure 7As shown, the driving rod 18 is connected to a cleaning mechanism, which includes a bevel gear 16 fixedly connected to the driving rod 18, the bevel gear 16 meshes with the bevel gear 2 15, the bevel gear 2 15 is fixedly connected to the threaded rod 14, the threaded rod 14 is threadedly connected to the threaded sleeve 13, the threaded sleeve 13 is slidably connected to the right end of the base shell 1, the threaded rod 14 is fixedly connected to the right end of the base shell 1 through the mounting plate 2 12, the threaded sleeve 13 is fixedly connected to the connecting block 3 10, and the connecting block 3 10 is slidably connected to the sliding cavity 11 at the right end of the base shell 1 The connecting block three 10 is fixedly connected to the connecting plate one 5 through the connecting block four 9. The upper end of the connecting plate one 5 is symmetrically provided with connecting frames 6 on both sides. The connecting frame 6 penetrates the lower end of the cleaning shell 2 and enters the cleaning chamber 3. A plurality of support rods 4 are slidably provided at the upper end of the connecting frame 6. Support tilting blocks 8 are correspondingly provided between adjacent support rods 4. The support tilting blocks 8 are fixedly connected to the side ends of the cleaning chamber 3 through the mounting block one 7. Support tilting blocks 8 are correspondingly provided in the internal through holes of the connecting frame 6. Spring rods 37 are fixedly provided between adjacent support rods 4.

[0061] The beneficial effects of the above technical solution are:

[0062] When the driving rod 18 rotates, it drives the bevel gear 16 to rotate, the bevel gear 16 drives the bevel gear 2 15 to rotate, the bevel gear 2 15 drives the threaded rod 14 to rotate, when the threaded rod 14 rotates, the threaded sleeve 13 slides upward along the right end of the base shell 1, the threaded sleeve 13 drives the connecting plate 15 to move upward through the connecting block 3 10 and the connecting block 4 9, the sliding cavity 11 guides the sliding of the connecting block 3 10, the connecting plate 15 drives the connecting frame 6 to move upward, the connecting frame 6 drives a number of support rods 4 to move upward, after the lower base plate 24 rotates 180 degrees, the support rod 4 just moves to the uppermost end, at this time the distance between the support rod 4 and the lower base plate 24 is the shortest, so that the new silicone hydrogel contact lens can gently fall on the support rod 4, when the driving rod 18 rotates in the opposite direction and the lower base plate 24 rotates in the opposite direction to 180 degrees to restore to its original position, the bevel gear 16 drives the connecting plate 15 ... the supporting rods 4 to move upward, and the supporting rods 4 move upward. The gear 16 rotates in the opposite direction, and finally the connection frame 6 moves downward into the cleaning chamber 3. After the connection frame 6 drives the support rods 4 to contact the support tilting block 8, the adjacent support rods 4 move away from each other, and the spring rods 37 are stretched, so that the new silicone hydrogel contact lenses on the support rods 4 fall into the alcohol-water mixture in the cleaning chamber 3. When the connection frame 6 moves upward again, under the elastic action of the spring rods 37, the support rods 4 return to their original positions. At this time, the gaps between the support rods 4 are small, and the new silicone hydrogel contact lenses cannot pass through. The setting of the cleaning mechanism can cooperate with the separation device. Only the motor 17 needs to work to separate the new silicone hydrogel contact lenses and automatically send them into the alcohol-water mixture. There is no need to transfer the new silicone hydrogel contact lenses to the alcohol-water mixture separately, which saves time and effort.

[0063] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A novel silicone hydrogel contact lens, characterized in that: It includes target weight portions of material A, material B, material C, a crosslinking agent, an initiator and an ultraviolet absorber, and the weight proportions of material A, material B, material C, the crosslinking agent, the initiator and the ultraviolet absorber are: 10-35: 1-10: 40-80: 0.1-0.5: 0.3-0.8: 0.5-1.

8.

2. A novel silicone hydrogel contact lens according to claim 1, characterized in that: Material A is a siloxane monomer substance, and the general formula of material A is: Where R1 is H or CH3; R2 is C 2～3 An alkyl group or an alkyl group containing one -OH substituent group; R3, R4 and R5 are 3. A novel silicone hydrogel contact lens according to claim 1, characterized in that: Material B is a siloxane polymerization cross-linking agent, and the general formula of the siloxane polymerization cross-linking agent is: Wherein R1 is CH2-CH2 or C3H6, R2 is a polyethylene glycol group with a molecular weight of less than 2000, R3 is an aliphatic diisocyanate group, and R4 is a polydimethylsiloxane group with a molecular weight of less than 4000.

4. A novel silicone hydrogel contact lens according to claim 1, characterized in that: Material C is two or more hydrophilic monomers, one of which is N-methyl-N-vinylacetamide, and the other hydrophilic monomers are any one or more combinations of N-vinylpyrrolidone and N,N-dimethylacrylamide.

5. A novel silicone hydrogel contact lens according to claim 1, characterized in that: The crosslinking agent is ethylene glycol dimethacrylate, the initiator is azobisisobutyronitrile, and the ultraviolet absorber is 2-(4-benzoyl-3-hydroxyphenoxy)ethyl 2-acrylate.

6. A method for preparing a novel silicone hydrogel contact lens according to any one of claims 1 to 5, characterized in that: The steps include: Step 1: uniformly mix target weight portions of material A, material B, material C, a cross-linking agent, an initiator and an ultraviolet absorber, and then filter the mixture using a microporous filter membrane. Add the filtrate into the mold cavity (33) of the lower mold (25) and close the mold. Step 2: The molded filtrate is polymerized and cured under the initiator condition to form the lens; Step 3: Using a separation device to separate the lower mold (25) from the lens; Step 4: The separated lenses are washed with an alcohol-water mixture, then placed in a saline buffer, sterilized, and packaged.

7. The method for preparing a novel silicone hydrogel contact lens according to claim 6, characterized in that: A plurality of lower molds (25) are evenly spaced on a lower base plate (24); a mold cavity (33) is provided at the upper end of the lower mold (25); the lower end of the lower base plate (24) is fixedly connected to a sealing shell (23); a sealing cavity (26) is provided inside the sealing shell (23); an upper base plate (32) is correspondingly provided on the upper side of the lower base plate (24); a plurality of upper molds (31) are evenly spaced at the lower end of the upper base plate (32); and the plurality of upper molds (31) and the plurality of lower molds (25) are arranged one by one in correspondence.

8. The method for preparing a novel silicone hydrogel contact lens according to claim 7, characterized in that: The separation device comprises a base shell (1), a working chamber is provided inside the base shell (1), a lower base plate (24) is provided on the upper side of the working chamber, a sealing plate (27) is slidably provided in the sealing chamber (26), the lower end of the sealing plate (27) is fixedly connected to a push block 1 (22), the push block 1 (22) passes through the lower end of the sealing chamber (26) and communicates with the outside, the inclined end of the push block 1 (22) is slidably connected to a push block 2 (21), the push block 2 (21) is fixedly connected to a sliding sleeve (20), A guide ball (28) is provided in the internal through hole of the sliding sleeve (20), the guide ball (28) is slidably connected to the arc groove section on the movable rod (56), the movable rod (56) is fixedly connected to the left end of the working chamber, a telescopic spring rod (29) is fixedly provided between the sliding sleeve (20) and the sealing shell (23), the right end of the sealing shell (23) is fixedly connected to the driving rod (18), the driving rod (18) passes through the right end of the working chamber and is fixedly connected to the motor (17), and the motor (17) is connected to the motor (17) through the mounting plate The first (19) is fixedly connected to the base shell (1), the movable rod (56) is rotatably connected to the guide sleeve (55) and the left end of the sealing shell (23), the guide sleeve (55) is rotatably connected to the groove 2 at the left end of the working chamber, and a torsion spring 1 (35) is fixedly arranged between the guide sleeve (55) and the groove 2, the inclined end of the guide sleeve (55) is slidably connected to the push block 3 (57), the push block 3 (57) is fixedly connected to the sliding sleeve (20), the torsion spring 1 (35) is sleeved on the movable rod (56), and the guide sleeve (55) is rotatably connected to the groove 2 at the left end of the working chamber. The guide sleeve (55) is fixedly connected to the fixed block (53), the fixed block (53) is in corresponding contact with the guide rod (52), the guide rod (52) is rotatably connected to the mounting seat at the lower end of the lower base plate (24), and a second torsion spring (54) is provided between the guide rod (52) and the mounting seat, the guide rod (52) is in corresponding contact with the push rod (36), the push rod (36) is fixedly connected to the left end of the working chamber through the second mounting block (30), and the second mounting block (30) is distributed on the lower side of the guide sleeve (55).

9. The method for preparing a novel silicone hydrogel contact lens according to claim 7, characterized in that: The lower end of the mold cavity (33) is provided with an air outlet hole (41), a blocking block (39) is slidably provided in the air outlet hole (41), air vents (42) are symmetrically provided at the left and right ends of the air outlet hole (41), the air vent (42) is communicated with the cavity (38), a blocking block (43) is slidably provided in the air vent (42), the blocking block (43) is fixedly connected to the sliding plate (45), the blocking block (39) is fixedly connected to the connecting block (40), the connecting block (40) penetrates the lower end of the air outlet hole (41) and the upper end of the cavity (38) into the cavity (38) and is fixedly connected to the sliding plate (45), the cavity (38) is arranged in the lower base plate (24), the sliding plate (45) is slidably connected to the cavity (38), and a plurality of springs (44) are fixedly provided between the sliding plate (45) and the cavity (38) The left and right sides of the lower end of the sliding plate (45) are correspondingly provided with limit blocks (49), the left and right sides of the cavity (38) are symmetrically provided with grooves (51), a plurality of springs (50) are fixedly provided between the limit blocks (49) and the grooves (51), the inclined end of the limit blocks (49) is in corresponding contact with the contact block (46) on the lower side, the contact block (46) on the lower side is fixedly connected to the contact block (46) on the upper side through the connecting block (47), the left and right sides of the sliding plate (45) are symmetrically provided with connecting blocks (47), a plurality of springs (48) are fixedly provided between the contact block (46) on the lower side and the connecting block (47), the springs (48) are sleeved on the connecting block (47), the cavity (38) is communicated with the air supply channel (34), and the air supply channel (34) is communicated with the sealing cavity (26).

10. The method for preparing a novel silicone hydrogel contact lens according to claim 8, characterized in that: The driving rod (18) is connected with a cleaning mechanism, which comprises a bevel gear 1 (16) fixedly connected to the driving rod (18), the bevel gear 1 (16) meshing with a bevel gear 2 (15), the bevel gear 2 (15) fixedly connected to a threaded rod (14), the threaded rod (14) threadedly connected to a threaded sleeve (13), the threaded sleeve (13) slidably connected to the right end of the base shell (1), the threaded rod (14) fixedly connected to the right end of the base shell (1) through a mounting plate 2 (12), the threaded sleeve (13) fixedly connected to a connecting block 3 (10), the connecting block 3 (10) slidably connected to a sliding cavity (11) at the right end of the base shell (1), and the connecting block 3 (10) is connected to the sliding cavity (11) at the right end of the base shell (1). The connection block three (10) is fixedly connected to the connection plate one (5) through the connection block four (9); connection frames (6) are symmetrically provided on the left and right sides of the upper end of the connection plate one (5); the connection frame (6) penetrates the lower end of the cleaning shell (2) and enters the cleaning chamber (3); a plurality of support rods (4) are slidably provided on the upper end of the connection frame (6); support tilting blocks (8) are correspondingly provided between adjacent support rods (4); the support tilting blocks (8) are fixedly connected to the side end of the cleaning chamber (3) through the mounting block one (7); support tilting blocks (8) are correspondingly provided in the internal through holes of the connection frame (6); and spring rods (37) are fixedly provided between adjacent support rods (4).

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