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US 2009/0212450 A1Published application
Method of manufacturing contact lens material and method of manufacturing soft contact lens
OwnerSuguru Imafukuinventor
Life of this patent
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Abstract
Provided is a contact lens material having a smooth surface with good water wettability and durability. In the method of manufacturing a contact lens material comprising a contact lens base material and a coating formed on at least a portion of a surface of the above base material, the contact lens base material is processed by plasma polymerization in a mixed gas atmosphere of methane and moist air, and then treated with plasma in a nonpolymerizable gas atmosphere to form the above coating. Further provided is a method of manufacturing a soft contact lens wherein water is introduced into the contact lens material manufactured by the above method to obtain a soft contact lens.
Claims17
1:
- A method of manufacturing a contact lens material comprising a contact lens base material and a coating formed on at least a portion of a surface of said base material, wherein said contact lens base material is processed by plasma polymerization in a mixed gas atmosphere of methane and moist air, and then treated with plasma in a nonpolymerizable gas atmosphere to form said coating.
2:
- The method of manufacturing according to claim 1, wherein said contact lens base material comprises silicone.
3:
- The method of manufacturing according to claim 1, wherein said moist air comprises equal to or greater than 150 ppm of moisture.
4:
- The method of manufacturing according to claim 1, wherein the mixing ratio of methane and moisture air, methane:moist air, in said mixed gas ranges from 50:50 to 70:30.
5:
- The method of manufacturing according to claim 1, wherein said nonpolymerizable gas is at least one selected from the group consisting of oxygen, argon, and air.
6:
- A method of manufacturing a soft contact lens, wherein water is introduced into the contact lens material manufactured by the method according to claim 1 to obtain a soft contact lens.
7:
- The method of manufacturing according to claim 6, which comprises subjecting the contact lens material prior to said water introduction to extraction treatment with an organic solvent.
8:
- The method of manufacturing according to claim 2, wherein said moist air comprises equal to or greater than 150 ppm of moisture.
9:
- The method of manufacturing according to claim 2, wherein the mixing ratio of methane and moisture air, methane:moist air, in said mixed gas ranges from 50:50 to 70:30.
10:
- The method of manufacturing according to claim 3, wherein the mixing ratio of methane and moisture air, methane:moist air, in said mixed gas ranges from 50:50 to 70:30.
11:
- The method of manufacturing according to claim 2, wherein said nonpolymerizable gas is at least one selected from the group consisting of oxygen, argon, and air.
12:
- The method of manufacturing according to claim 3, wherein said nonpolymerizable gas is at least one selected from the group consisting of oxygen, argon, and air.
13:
- The method of manufacturing according to claim 4, wherein said nonpolymerizable gas is at least one selected from the group consisting of oxygen, argon, and air.
14:
- A method of manufacturing a soft contact lens, wherein water is introduced into the contact lens material manufactured by the method according to claim 2 to obtain a soft contact lens.
15:
- A method of manufacturing a soft contact lens, wherein water is introduced into the contact lens material manufactured by the method according to claim 3 to obtain a soft contact lens.
16:
- A method of manufacturing a soft contact lens, wherein water is introduced into the contact lens material manufactured by the method according to claim 4 to obtain a soft contact lens.
17:
- A method of manufacturing a soft contact lens, wherein water is introduced into the contact lens material manufactured by the method according to claim 5 to obtain a soft contact lens.