Claims
- 1. A cleaning member for removing foreign matter deposited on an ink discharging outlet face of an ink jet recording head for conducting recording on a recording medium by discharging ink, said cleaning member comprising an ether series polyurethane rubber elastic body comprised of:a polyether polyurethane prepolymer, a curing agent component for said polyether polyurethane prepolymer consisting only of a bifunctional component, and a water repellency-adding material having an active group for chemically bonding to said polyurethane rubber, wherein said curing agent comprises a compound selected from the group consisting of diols, glycols, bisphenols, and diamines, and said water repellency-adding material comprises a compound selected from the group consisting of modified silicone compounds and reactive fluorine-containing compounds.
- 2. A cleaning member according claim 1, wherein the ink is aqueous ink.
- 3. A cleaning member according to claim 1, wherein an ink contact angle at a surface of the cleaning member is 80° or above.
- 4. A cleaning member according to claim 1, wherein an amount of a sum of an active element of the curing agent component and the active group of the water repellency-adding material is present in a molar ratio of 0.8 to 1.05 of an amount of the isocyanate group contained in the polyurethane rubber.
- 5. A cleaning member according to claim 1, wherein the recording head comprises an ink jet recording system in which recording is conducted by discharging liquid droplets through a discharging element using thermal energy, said ink jet recording system being provided with an electrothermal converting body as a means for generating said thermal energy.
- 6. A cleaning member according to claim 1, wherein the water repellency-adding material is contained in the polyurethane rubber and the water repellency-adding material is compatible with the polyurethane rubber of the elastic body.
- 7. A cleaning member according to claim 1, wherein the water repellency-adding material is a fluorine-containing compound.
- 8. A cleaning member according to claim 1, wherein the water repellency-adding material is present in an amount in a range from 0.1 to 20 parts by weight versus 100 parts by weight of a total amount of the polyurethane rubber and the curing agent component.
- 9. A cleaning member according to claim 1, wherein said water repellency-adding material is contained in and is compatible with said polyurethane rubber of said elastic body, and said cleaning member has a surface of 80° or above in ink contact angle.
- 10. A cleaning member according to claim 9, wherein the bifunctional component is a straight-chain diol.
- 11. A cleaning member according to claim 9, wherein the ink is aqueous ink.
- 12. A cleaning member according to claim 9, wherein an amount of a sum of an active element of the curing agent component and the active group of the water repellency-adding material is present in a molar ratio of 0.8 to 1.05 of an amount of the isocyanate group contained in the polyurethane rubber.
- 13. A cleaning member according to claim 9, wherein the water repellency-adding material is a fluorine-containing compound.
- 14. A cleaning member according to claim 9, wherein the water repellency-adding material is present in an amount in a range of 0.1 to 20 parts by weight versus 100 parts by weight of a total amount of the polyurethane rubber and the curing agent component.
- 15. An ink jet apparatus provided with a support member for holding an ink jet head for conducting recording on a recording medium by discharging aqueous ink, said support member being provided with a means for scanning between a recording zone wherein said recording medium is transported and a non-recording zone outside said recording zone, and a cleaning blade for cleaning a discharging outlet face of said ink jet head in said non-recording zone, said cleaning blade comprising an ether series polyurethane rubber elastic body comprised of:a polyether polyurethane prepolymer, a curing agent component for said polyether polyurethane prepolymer consisting only of a bifunctional component, and a water repellency-adding material having an active group for chemically bonding to said polyurethane rubber, wherein said curing agent comprises a compound selected from the group consisting of diols, glycols, bisphenols, and diamines, and said water repellency-adding material comprises a compound selected from the group consisting of modified silicone compounds and reactive fluorine-containing compounds.
- 16. An ink jet apparatus according to claim 15, wherein said water repellency-adding material is contained in and is compatible with said polyurethane rubber of said elastic body, and said cleaning blade has a surface of 80° or above in ink contact angle.
Priority Claims (1)
Number |
Date |
Country |
Kind |
PCT/JP92/01163 |
Sep 1992 |
WO |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/050,451 filed Oct. 4, 1993.
US Referenced Citations (3)
Continuations (1)
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Number |
Date |
Country |
Parent |
08/050451 |
Oct 1993 |
US |
Child |
08/631885 |
|
US |