28 results about "Oxygen permeability" patented technology

The invention provides a degradable contact lens and a preparation method thereof, and belongs to the technical field of contact lenses. The preparation method comprises the following steps: firstly, dissolving collagen in an acetic acid solution to obtain a collagen solution; dissolving hyaluronic acid in water to obtain a hyaluronic acid solution; the hyaluronic acid is formed by mixing first hyaluronic acid and second hyaluronic acid, the molecular weight of the first hyaluronic acid is 50-300 kDa, and the molecular weight of the second hyaluronic acid is 800-1500 kDa; and finally, mixing the collagen solution and the hyaluronic acid solution, and sequentially carrying out first crosslinking, second crosslinking and post-treatment to obtain the contact lens. The contact lens prepared by the invention has high oxygen permeability, proper mechanical properties and controllable degradability.

The present invention provides a contact lens monomer composition using a small molecular weight organosilicon compound, a polymer of the composition, and a contact lens using the polymer, which can produce a contact lens having excellent oxygen permeability, mechanical strength, transparency, durability, and wearing sensation. Specifically, a composition containing (A) a methacrylate monomer containing a phosphoryl choline group, (B) an itaconic acid diester monomer containing a siloxane group, (C) a specific hydrophilic monomer, (D) a (meth)acrylate containing a siloxane group, and (E) a specific crosslinking agent in specific proportions, a polymer thereof, and a contact lens using the polymer.

The embodiment of the present application relates to the technical field of optical material manufacturing, and specifically discloses a medical optical material, a preparation method and application thereof, the medical optical material comprises the following raw materials: photosensitive resin, crosslinking agent, photoinitiator, inhibitor and ultraviolet blocking monomer. The embodiment of the present application adopts a continuous liquid surface photocuring technology based on a 405nm light source, realizes steep polymerization threshold and stable inhibition layer through O2 / TEMPO double inhibition, significantly reduces ghosting and window sticking, and completes deep layer crosslinking in an N2 environment while inhibiting yellowing and haze through secondary UV irradiation and heat post-curing, thereby solving the problem that most existing orthokeratology lenses adopt a traditional layered photocuring process and are prone to defects such as ghosting and yellowing. Moreover, the preparation method provided by the embodiment of the present application is simple, can be used for preparing orthokeratology lenses and other optical components with high optical quality, high oxygen permeability and biocompatibility, and has a broad market prospect.

The invention discloses a fixed-axis contact lens capable of preventing highlight patterns from rotating. The fixed-axis contact lens comprises an optical area located in the center, a balance area arranged around the optical area, auxiliary supporting areas symmetrically arranged on the left side and the right side below the balance area, a thinning area arranged above the balance area and a vertical weight area arranged below the auxiliary supporting areas. Transition buffer areas are arranged on the peripheries of the thinning area, the auxiliary supporting area and the vertical weight area, and edge areas are arranged on the peripheries of the transition buffer areas. According to the invention, the thinning area and the vertical weight area are oppositely arranged in the vertical direction, and the asymmetric thickness structure of the auxiliary supporting area is combined, so that a vertical and horizontal two-dimensional anti-rotation locking mechanism is formed, the angle deviation of the highlight pattern can be controlled within + / -1 degree, and meanwhile, the oxygen permeation rate and the wearing comfort are ensured; the contact lens is suitable for highlight decoration and astigmatism correction.

The invention discloses a biodegradable film which is of a four-layer composite structure and sequentially comprises a heat sealing layer, a core base material layer, a blocking layer and an anti-scraping coating from inside to outside. The 60-day biodegradation rate of the biodegradable film is larger than or equal to 90%, the haze is smaller than or equal to 3%, the oxygen permeability is smaller than or equal to 50 cc / (m < 2 >. Day. Atm), the water vapor permeability is smaller than or equal to 5 g / (m < 2 >. Day. Atm), the heat sealing strength is larger than or equal to 3 kgf / 15 mm, the heat shrinkage rate is 4-6%, and the longitudinal and transverse shrinkage difference is smaller than 0.5%. The invention further discloses a preparation method and application of the biodegradable film.

The invention relates generally to an insert intended to be embedded in a silicone hydrogel contact lens. The insert is made of crosslinked materials that are rigid in the dry state at room temperature (approximately 22°C to approximately 26°C), have high oxygen permeability and a high refractive index in the fully hydrated state, and can be softened at temperatures above 32°C. Such materials are useful in the manufacture of embedded contact lens inserts for correcting corneal astigmatism, presbyopia, and color blindness, and for imparting photochromic characteristics to the lenses. The invention also relates to a method for manufacturing embedded silicone hydrogel contact lenses comprising an insert of the invention, and embedded silicone hydrogel contact lenses comprising an insert of the invention.

The present invention provides a hard contact lens that has high oxygen permeability and a large bending deformation capacity, making it resistant to breakage from bending deformation, and a hard contact lens material that can be used to manufacture such a hard contact lens. [Solution] According to one aspect of the present invention, a hard contact lens material is provided, comprising a substituted methacrylate (A) having a molecular structure in which the ratio of the number of fluorine atoms to the number of carbon atoms is 0.6 or more and 0.9 or less, a substituted styrene (B), a methacryloyl group-containing silicone monomer (C), a (meth)acryloyl group-containing monomer (D), an unsaturated double bond-containing hydrophilic monomer (E), and a methacryloyl group-containing monomer (F), wherein the molar ratio of (meth)acryloyl group-containing monomer (D) to methacryloyl group-containing monomer (F) is 0.12 or more and 0.2 or less.

The invention belongs to the technical field of contact lens materials, and discloses a high-moisture-retention contact lens material and a preparation method thereof. The raw materials of the invention comprise 50-70 parts of a silicon-based monomer, 40-60 parts of a hydrophilic monomer, 5-15 parts of hyaluronic acid, 3-10 parts of water-soluble collagen, 2-8 parts of modified chitosan, 1-5 parts of a moisturizing aid, 0.5-3 parts of a cross-linking agent, 0.1-1 part of a photoinitiator and 10-20 parts of water. The contact lens material prepared by the invention is low in water loss rate, long in moisturizing time, excellent in biocompatibility, excellent in oxygen permeability, simple in preparation process and easy to industrialize.

To provide a multilayer film that allows for the heat sealing of containers that have high oxygen permeability and are resistant to tearing from impacts such as dropping when containing liquid. [Solution] The device comprises a heat-seal layer containing polyolefin, a core layer containing styrene-based elastomer, and an outer layer containing 4-methyl-1-pentene copolymer, with an oxygen permeability of 3.0 L / (m³) at 23°C. 2 ·day · atm) or more 100.0L / (m 2 A multilayer film that is less than or equal to (day·atm).

This invention provides a soft hydrophilic contact lens and its preparation method, belonging to the technical field of soft hydrophilic contact lenses. This invention combines monomers such as hydroxyethyl methacrylate, N-vinylpyrrolidone, N,N-dimethylacrylamide, and methyl acrylate with moisturizing components such as polydeoxyribonucleotides, polyethylene glycol 400, and polyvinylpyrrolidone K90, and employs a specific crosslinking agent and initiator system. The resulting soft hydrophilic contact lens exhibits excellent initial water content and water retention capacity after prolonged wear. The synergistic effect of polydeoxyribonucleotides, polyethylene glycol 400, and polyvinylpyrrolidone K90 significantly enhances the lens's hydrophilicity and moisturizing properties, effectively alleviating problems such as dry eyes, increased lens deposits, and low oxygen permeability caused by water loss during wear.

The utility model provides a corneal contact lens oxygen permeability performance detection device, which comprises a box body, an execution part and a control part, the execution part comprises a lower cavity body, the top of the lower cavity body is provided with an arc-shaped concave surface and a convex ring, and the middle of the arc-shaped concave surface is provided with a lower air hole; an arc-shaped protruding face and a groove are formed in the bottom of the upper cavity body, a sealing ring is arranged in the groove, an upper air hole is formed in the middle of the arc-shaped protruding face, and an oxygen sensor is arranged in the upper cavity body; the upper cavity body is configured to move up and down relative to the lower cavity body; the arc-shaped convex surface, the groove and the upper air hole are respectively matched with the arc-shaped concave surface, the convex ring and the lower air hole correspondingly; and the lower chamber body and the upper chamber body are correspondingly communicated with a lower gas pipe interface for externally connecting oxygen and an upper gas pipe interface for externally connecting nitrogen respectively. The novel corneal contact lens is simple in structural design, convenient to operate and suitable for being used as a soft or hard corneal contact lens, and the lens cannot be damaged.

A packaging material (2) according to the present disclosure comprises a first base material layer (3), a barrier layer (4), and a sealant layer (5) in the stated order, the packaging material (2) being characterized in that: the first base material layer (3) contains a polyester-based resin; the barrier layer (4) is a vapor-deposited film of a metal oxide; the sealant layer (5) contains a heat-sealable resin; in order that the color tone in a CIE 1976 color space, as calculated from a reflection spectrum measured in conformance with JIS Z 8722:2009 under a D65 light source and a viewing angle of 2°, is comparable to the color tone of a specific packaging film used in the prior art, the color difference ΔE*ab from the color tone of the specific prior-art film within a specific numeric range or the color difference ΔE*ab from the color tone of the D65 light source is 1.20-1.80; and the oxygen permeability measured in conformance with JIS K 7126-2:2006 is 1.5 mL / m2⋅day⋅MPa or lower.

An oxygen permeable contact lens has a convex arc-shaped outer surface and a concave arc-shaped inner surface located on an opposite side of the outer surface; wherein the contact lens is processed by a 5 laser straight line penetrating the outer surface and the inner surface to provide at least one oxygen permeable hole. 8 20 25 20 00 45 04 J an 2 02 5 A B S T R A C T 2 0 2 5 2 0 0 0 4 5 0 4 J a n 2 0 2 5 - 8 - - 2 / 72 / 7 12 13 103 11 12 102 13 11 101 10 FIG. 2 20 25 20 00 45 04 J an 2 02 5 2 / 7 2 0 2 5 2 0 0 0 4 5 0 4 J a n 2 0 2 5

The invention relates to a silage film with a total thickness between 75 µm and 150 µm, comprising at least one outer and at least one inner layer, wherein the middle layer consists of a soft polyethylene (PE) selected from linear low-density polyethylene (LLDPE) or low-density polyethylene (LDPE), at least one functional layer arranged on both sides of the central layer, and at least one intermediate layer situated between each functional layer and the outer or inner layer. At least one functional layer consists of a special polyethylene that replaces conventional barrier layers. The silage film has an oxygen permeability of less than 150 cm³. 3 / m 2 / 24h at 23 °C and 50% relative humidity, measured according to ASTM D3985. The silo film is completely free of barrier layers, including polyamide (PA) or ethylene vinyl alcohol (EVOH).

The invention provides a contact lens moisturizing coating and a preparation method thereof, and belongs to the technical field of contact lenses. The coating is of a three-layer composite structure and sequentially comprises a substrate bonding layer, an intelligent response layer and a surface functional layer from inside to outside, and the total thickness is 350-800 nm; the substrate bonding layer improves adhesive force, the intelligent response layer takes humidity sensitive hydrogel and MXene nanosheets as cores to realize dynamic moisturizing adjustment, and the surface functional layer integrates a bionic nanostructure and has antibacterial and ultraviolet blocking functions. According to the method, the self-assembly and nanoimprint lithography combined technology is adopted, the process is simple and convenient, and the automation degree is high. The coating provided by the invention has long-acting moisture retention for more than or equal to 16 hours, broad-spectrum antibiosis of more than or equal to 99.9%, ultraviolet barrier of more than or equal to 95% and oxygen permeability of more than or equal to 100 Dk / t, has excellent biocompatibility and strong stability, can adapt to contact lenses in different periods and different scenes, reduces the industrialization cost by 20-30% compared with the traditional technology, and has extremely high practical value and market prospect.

The invention is related to a hydrated silicone hydrogel contact lens having a layered structural configuration: a lower water content silicone hydrogel core (or bulk material) completely covered with a layer of a higher water content hydrogel totally or substantially free of silicone. A hydrated silicone hydrogel contact lens of the invention possesses high oxygen permeability for maintaining the corneal health and a soft, water-rich, lubricious surface for wearing comfort.

The utility model relates to the field of contact lenses, and discloses a contact lens structure capable of improving ventilation effect, which comprises a lens, a first coating film and a second coating film, the first coating film and the second coating film are sequentially wrapped on the lens from inside to outside, one side surface of the first coating film is inserted into the second coating film, and the other side surface of the first coating film is inserted into the lens; the edge of the first coating film is provided with a continuous protrusion away from the lens, the edge of the second coating film is provided with a double-arch-shaped structure matched with the continuous protrusion in shape, and the double-arch-shaped structure is arranged on the eyeball in a supporting mode so that an air layer for air circulation can be transversely arranged between the second coating film and the eyeball in an attached mode. When the second coating film is in a pressed state, the double-arch-shaped structure is pressed and deformed, and the air layer is extruded, so that the second coating film is attached to the eyeball. According to the utility model, the static and dynamic double ventilation effects are realized in the wearing process of the lens, and the air on the eyeball surface and the external environment can rapidly and dynamically circulate in the wearing process, so that the oxygen permeability of the lens is improved.

The embodiment of the utility model provides a quantum dot composite membrane, a backlight module and a display device. The quantum dot composite film comprises a first base material layer, a quantum dot film layer and a first prism structure layer which are sequentially arranged in a stacked mode, and the quantum dot film layer comprises a base body and quantum dots dispersed in the base body. According to the quantum dot composite membrane, the quantum dot membrane layer is arranged between the first base material layer and the first prism structure layer, so that the quantum dot membrane layer can be protected by using the first base material layer and the first prism structure layer, water and oxygen are prevented from permeating or the water and oxygen permeability is reduced; the quantum dot composite film integrates the functions of a quantum dot film and a brightness enhancement film, integration of quantum dot light conversion and optical brightness enhancement is achieved, the thickness of the quantum dot composite film is small, light and thin display products can be achieved easily, a water and oxygen barrier film does not need to be arranged in the quantum dot composite film independently, and therefore the quantum dot composite film is convenient to use. Therefore, the production cost of the quantum dot composite membrane can be reduced.

A stretched film (10) comprises at least a substrate layer (3) and a barrier layer (5), wherein: the substrate layer (3) has, as the main component thereof, a high-density polyethylene which has a density of not less than 0.950 g / cm3; the barrier layer (5) has, as the main component thereof, an ethylene-vinyl alcohol copolymer which has an ethylene content of 27-38 mol%; oxygen permeability in an atmosphere with a humidity of 90% and a temperature of 25°C is not more than 2.5 cc / m2･day; and thermal shrinkage in the stretching direction of the film upon heating for 10 minutes at 120°C is not more than 5%.

The invention is related to a hydrated silicone hydrogel contact lens having a layered structural configuration: a lower water content silicone hydrogel core (or bulk material) completely covered with a layer of a higher water content hydrogel totally or substantially free of silicone. A hydrated silicone hydrogel contact lens of the invention possesses high oxygen permeability for maintaining the corneal health and a soft, water-rich, lubricious surface for wearing comfort.

The invention provides a silicone hydrogel lens as well as a preparation method and application thereof, and belongs to the technical field of contact lenses. According to the invention, an organic silicon monomer is taken as a main body, a composite formula system of a high-oxygen-permeability silicon-based skeleton and a hydrophilic functional monomer is adopted, and a physical mixing process is adopted to realize dual-advantage fusion and accurate proportion of each core component, so that a product system with both oxygen permeability and comfort is obtained, and safe, comfortable and healthy vision correction choices are provided for consumers.

The invention provides a novel silicone hydrogel contact lens and a preparation method thereof. The novel silicone hydrogel contact lens is prepared from the following raw materials in parts by weight: 5-30 parts of fluorine-containing siloxane monomer, 3-15 parts of polyether modified siloxane oligomer, 40-80 parts of composite hydrophilic monomer, a functional cross-linking agent, a photoinitiator, an anti-deposition agent and a natural moisturizing factor. The preparation method comprises the following steps: mixing and filtering the raw materials, performing ultraviolet prepolymerization and thermal polymerization, removing unreacted monomers through supercritical CO2 extraction, and performing post-treatment sterilization. Deposition resistance and oxygen permeability are improved through fluorine-containing siloxane, compatibility is optimized through polyether modified oligomer, wearing comfort is enhanced through an anti-deposition agent and a natural moisturizing factor, the oxygen permeability coefficient reaches 140-180 barrs, the protein adsorption quantity is reduced, the continuous wearing comfort is prolonged, and the contact lens is suitable for the field of high-performance contact lenses.

[Problem] To provide: a hard contact lens that has high oxygen permeability and, as a result of having a large bending deformation amount, is not easily damaged by bending deformation; and a hard contact lens material with which it is possible to manufacture the hard contact lens. [Solution] One aspect of the present invention provides a hard contact lens material which comprises a substituted methacrylate (A) having a molecular structure where the ratio of the number of fluorine atoms to the number of carbon atoms is 0.6-0.9, a substituted styrene (B), a methacryloyl group-containing silicone monomer (C), a (meth)acryloyl group-containing monomer (D), an unsaturated double bond-containing hydrophilic monomer (E), and a methacryloyl group-containing monomer (F), and in which the mole ratio of the (meth)acryloyl group-containing monomer (D) to the methacryloyl group-containing monomer (F) is 0.12-0.2.

The application provides a moisturizing anti-fouling contact lens and a preparation method thereof, and belongs to the technical field of contact lenses. The application adopts a silicon hydrogel as a substrate, and adopts sulfobetaine, carboxybetaine and polymethyl carboxybetaine to construct a gradient functional layer. Through semi-solidification pre-polymerization, low-temperature impregnation and two-stage photopolymerization, the functional layer is firmly combined with the substrate. The obtained product has high oxygen permeability, excellent moisturizing property and anti-protein contamination capacity, and has stable structure and comfortable wearing, and can effectively solve the problems of easy contamination, poor moisturizing property and easy falling of the functional layer of the traditional contact lens.

The invention is related to a hydrated silicone hydrogel contact lens having a layered structural configuration: a lower water content silicone hydrogel core (or bulk material) completely covered with a layer of a higher water content hydrogel totally or substantially free of silicone. A hydrated silicone hydrogel contact lens of the invention possesses high oxygen permeability for maintaining the corneal health and a soft, water-rich, lubricious surface for wearing comfort.

The embodiment of the invention relates to the technical field of optical material manufacturing, and particularly discloses a medical optical material and a preparation method and application thereof, and the medical optical material comprises the following raw materials: photosensitive resin, a cross-linking agent, a photoinitiator, an inhibitor and an ultraviolet blocking monomer. According to the embodiment of the invention, a continuous liquid level photocuring technology based on a 405nm light source is adopted, a steep polymerization threshold value and a stable inhibition layer are realized through O2 / TEMPO dual inhibition, ghosting and window sticking are remarkably reduced, meanwhile, deep crosslinking is completed and yellowing and haze are inhibited in an N2 environment in cooperation with secondary UV irradiation and heat post-curing, and the product quality is improved. The problems that most of existing orthokeratology lenses adopt a traditional layered light curing process, and the defects of ghosting, yellowing and the like of products are prone to occurring are solved. Moreover, the preparation method provided by the embodiment of the invention is simple, can be used for preparing orthokeratology lenses and other optical components with high optical quality, high oxygen permeability and biocompatibility, and has a wide market prospect.

The present application discloses a contact lens. The contact lens comprises a lens body, an electronic component and a circuit structure. The lens body comprises an optical part and a ring-shaped wearing part surrounding the optical part, the ring-shaped wearing part has a layout area in C shape and a lower eyelid area between two ends of the layout area. The electronic component is embedded in the lower eyelid area. The circuit structure is embedded in the ring-shaped wearing part. The circuit structure comprises a carrier plate and a circuit formed on the carrier plate and connected to the electronic component. The carrier plate has a C-shaped section embedded in the layout area. The C-shaped section is formed with at least one through hole, the area of which occupies 1% to 85% of the area surrounded by the outer contour of the C-shaped section. Accordingly, by the contact lens through at least one of the through holes, the situation that the carrier plate generates wrinkles or stress concentration is effectively reduced, and the oxygen permeability of the contact lens can be further improved.