Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Surface Plasma Hydrophilic Modification Method of Fluorosilicone Rigid Contact Lens

A surface plasma, contact lens technology, applied in the direction of plasma, glasses/goggles, optics, etc., can solve the problems of affecting deposition, poor hydrophilicity, affecting wearing comfort of glasses, etc., to reduce deposition, hydrophilicity, etc. Improves and facilitates the effect of mass production

Active Publication Date: 2011-12-14
SCHOOL OF OPHTHALMOLOGY & OPTOMETRY WENZHOU MEDICAL COLLEGE +1
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the RGP contact lens uses a resin material containing fluorine-silicon, the surface energy of this material is low, which makes the surface of the material less hydrophilic, and this phenomenon will change due to the migration of fluorine-silicon groups to the surface. The surface hydrophilicity is a very important factor for contact lenses, which directly affects the wearing comfort of the glasses, and also affects the deposition of substances such as proteins and lipids in tears on the lens surface

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Surface Plasma Hydrophilic Modification Method of Fluorosilicone Rigid Contact Lens
  • Surface Plasma Hydrophilic Modification Method of Fluorosilicone Rigid Contact Lens
  • Surface Plasma Hydrophilic Modification Method of Fluorosilicone Rigid Contact Lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] §1, including the following steps: (1) flush the plasma processing system several times with Ar gas; (2) put the fluorosilicon contact lens into the system, and start vacuuming; (3) after the system vacuum reaches below 5Pa, pass Gas flow controller into the atmosphere, such as Ar, O 2 or N 2 , to increase the system pressure to the required pressure and stabilize it for a period of time; (4) set the required plasma treatment power; (5) set the required plasma treatment time; (6) turn on the plasma discharge power supply, and carry out surface After the processing is completed, close the intake valve, and then vacuum for a period of time.

[0031] §2. The process parameters of the plasma treatment system are as follows:

[0032] Handling Atmosphere: Ar

[0033] Plasma Frequency: 40kHz

[0034] Power size: 100W

[0035] Processing time: 120s

[0036] Atmospheric pressure: 30Pa.

Embodiment 2

[0038] Concrete processing step is identical with embodiment 1 (§1), and the technological parameter of present embodiment plasma treatment system is as follows:

[0039] Handling atmosphere: O 2

[0040] Plasma frequency: 40kHz

[0041] Power size: 100W

[0042] Processing time: 120s

[0043] Atmospheric pressure: 30Pa.

Embodiment 3

[0045] Concrete processing step is identical with embodiment 1 (§1), and the technological parameter of present embodiment plasma processing system is as follows:

[0046] Handling atmosphere: N 2

[0047] Plasma Frequency: 40kHz

[0048] Power size: 100W

[0049] Processing time: 120s

[0050] Atmospheric pressure: 30Pa.

[0051] Measure the contact angle of the surface hydrophilic fluorosilicon contact lens surface that each above-mentioned implementation example makes as shown in Table 1:

[0052] Table I

[0053] Example 1 Example 2 Example 3 untreated sample Surface contact angle (°) 32 41 40 107

[0054] Through Table 1 and the attached figure 1 and attached figure 2 It can be clearly found that the contact angle of the surface of the fluorosilicon hard contact lens treated by the process of the present invention is obviously improved.

[0055] From attached image 3 And attached Figure 4 The Si2p XPS test result figure...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for modifying the surface hydrophilicity of a fluorosilicon hard corneal contact lens. The main process is to use low-temperature plasma to treat the surface of the contact lens to improve the surface hydrophilicity of the contact lens. The surface is hydrophilic Sexual modification is beneficial to reduce the deposition of protein and lipid on the contact lens surface, improve the wearing comfort of the lens, and prolong the wearing time. The gas used is non-reactive inert gas, such as O2, Ar and N2, etc., the plasma frequency is 40kHz, the power is 50-150W, and the processing time is 30-150s. The change of the chemical state of the silicon element on the surface is the main reason for the improvement of hydrophilicity. The surface modification method of the rigid contact lens has simple process, simple equipment, no need of other chemical reagents, energy saving and environmental protection, and has good application prospect and scientific significance.

Description

technical field [0001] The invention relates to a method for modifying the hydrophilicity of a hard contact lens, in particular to a method for modifying the surface plasma hydrophilicity of a fluorosilicon hard contact lens. Background technique [0002] Gas permeable rigid contact lens, referred to as RGP, is the latest generation of contact lens, which is made of a special resin material containing fluorine silicon through CNC lathe precision machining. Due to its unique high oxygen permeability, RGP ensures sufficient oxygen metabolism on the corneal surface, reduces the common complications of ordinary soft contact lenses, is safer to wear, and has better optical quality, especially for eyes with large anisometropia and high astigmatism , Irregular astigmatism, and aphakic eyes will also be well corrected. It also has good results in the correction of refractive errors and in therapeutic indications. RGP glasses are easy to use, easy to care for, and have a longer ser...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G02C7/04H05H1/24
Inventor 陈浩瞿佳尹诗衡任力赵连娜王迎军
Owner SCHOOL OF OPHTHALMOLOGY & OPTOMETRY WENZHOU MEDICAL COLLEGE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com